diff options
Diffstat (limited to 'bin/dash/src')
79 files changed, 0 insertions, 24555 deletions
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uninstall-binPROGRAMS uninstall-man uninstall-man1 - -.PRECIOUS: Makefile - - -token.h token_vars.h: mktokens - $(AM_V_GEN)$(SHELL) mktokens - -builtins.def: builtins.def.in $(top_builddir)/config.h - $(AM_V_CC)$(COMPILE) -E -x c -o $@ builtins.def.in - -builtins.c builtins.h: mkbuiltins builtins.def - $(AM_V_GEN)$(SHELL) mkbuiltins builtins.def - -init.c: mkinit $(dash_CFILES) - $(AM_V_GEN)./mkinit $(dash_CFILES) - -nodes.c nodes.h: mknodes nodetypes nodes.c.pat - $(AM_V_GEN)./mknodes nodetypes nodes.c.pat - -syntax.c syntax.h: mksyntax - $(AM_V_GEN)./mksyntax - -signames.c: mksignames - $(AM_V_GEN)./mksignames - -mksyntax: token.h - -$(HELPERS): - $(AM_V_CC)$(COMPILE_FOR_BUILD) -o $@ $@.c - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/bin/dash/src/TOUR b/bin/dash/src/TOUR deleted file mode 100644 index e30836e1..00000000 --- a/bin/dash/src/TOUR +++ /dev/null @@ -1,343 +0,0 @@ -# @(#)TOUR 8.1 (Berkeley) 5/31/93 - -NOTE -- This is the original TOUR paper distributed with ash and -does not represent the current state of the shell. It is provided anyway -since it provides helpful information for how the shell is structured, -but be warned that things have changed -- the current shell is -still under development. - -================================================================ - - A Tour through Ash - - Copyright 1989 by Kenneth Almquist. - - -DIRECTORIES: The subdirectory bltin contains commands which can -be compiled stand-alone. The rest of the source is in the main -ash directory. - -SOURCE CODE GENERATORS: Files whose names begin with "mk" are -programs that generate source code. A complete list of these -programs is: - - program intput files generates - ------- ------------ --------- - mkbuiltins builtins builtins.h builtins.c - mkinit *.c init.c - mknodes nodetypes nodes.h nodes.c - mksignames - signames.h signames.c - mksyntax - syntax.h syntax.c - mktokens - token.h - bltin/mkexpr unary_op binary_op operators.h operators.c - -There are undoubtedly too many of these. Mkinit searches all the -C source files for entries looking like: - - INIT { - x = 1; /* executed during initialization */ - } - - RESET { - x = 2; /* executed when the shell does a longjmp - back to the main command loop */ - } - -It pulls this code out into routines which are when particular -events occur. The intent is to improve modularity by isolating -the information about which modules need to be explicitly -initialized/reset within the modules themselves. - -Mkinit recognizes several constructs for placing declarations in -the init.c file. - INCLUDE "file.h" -includes a file. The storage class MKINIT makes a declaration -available in the init.c file, for example: - MKINIT int funcnest; /* depth of function calls */ -MKINIT alone on a line introduces a structure or union declara- -tion: - MKINIT - struct redirtab { - short renamed[10]; - }; -Preprocessor #define statements are copied to init.c without any -special action to request this. - -INDENTATION: The ash source is indented in multiples of six -spaces. The only study that I have heard of on the subject con- -cluded that the optimal amount to indent is in the range of four -to six spaces. I use six spaces since it is not too big a jump -from the widely used eight spaces. If you really hate six space -indentation, use the adjind (source included) program to change -it to something else. - -EXCEPTIONS: Code for dealing with exceptions appears in -exceptions.c. The C language doesn't include exception handling, -so I implement it using setjmp and longjmp. The global variable -exception contains the type of exception. EXERROR is raised by -calling error. EXINT is an interrupt. - -INTERRUPTS: In an interactive shell, an interrupt will cause an -EXINT exception to return to the main command loop. (Exception: -EXINT is not raised if the user traps interrupts using the trap -command.) The INTOFF and INTON macros (defined in exception.h) -provide uninterruptable critical sections. Between the execution -of INTOFF and the execution of INTON, interrupt signals will be -held for later delivery. INTOFF and INTON can be nested. - -MEMALLOC.C: Memalloc.c defines versions of malloc and realloc -which call error when there is no memory left. It also defines a -stack oriented memory allocation scheme. Allocating off a stack -is probably more efficient than allocation using malloc, but the -big advantage is that when an exception occurs all we have to do -to free up the memory in use at the time of the exception is to -restore the stack pointer. The stack is implemented using a -linked list of blocks. - -STPUTC: If the stack were contiguous, it would be easy to store -strings on the stack without knowing in advance how long the -string was going to be: - p = stackptr; - *p++ = c; /* repeated as many times as needed */ - stackptr = p; -The following three macros (defined in memalloc.h) perform these -operations, but grow the stack if you run off the end: - STARTSTACKSTR(p); - STPUTC(c, p); /* repeated as many times as needed */ - grabstackstr(p); - -We now start a top-down look at the code: - -MAIN.C: The main routine performs some initialization, executes -the user's profile if necessary, and calls cmdloop. Cmdloop is -repeatedly parses and executes commands. - -OPTIONS.C: This file contains the option processing code. It is -called from main to parse the shell arguments when the shell is -invoked, and it also contains the set builtin. The -i and -j op- -tions (the latter turns on job control) require changes in signal -handling. The routines setjobctl (in jobs.c) and setinteractive -(in trap.c) are called to handle changes to these options. - -PARSING: The parser code is all in parser.c. A recursive des- -cent parser is used. Syntax tables (generated by mksyntax) are -used to classify characters during lexical analysis. There are -three tables: one for normal use, one for use when inside single -quotes, and one for use when inside double quotes. The tables -are machine dependent because they are indexed by character vari- -ables and the range of a char varies from machine to machine. - -PARSE OUTPUT: The output of the parser consists of a tree of -nodes. The various types of nodes are defined in the file node- -types. - -Nodes of type NARG are used to represent both words and the con- -tents of here documents. An early version of ash kept the con- -tents of here documents in temporary files, but keeping here do- -cuments in memory typically results in significantly better per- -formance. It would have been nice to make it an option to use -temporary files for here documents, for the benefit of small -machines, but the code to keep track of when to delete the tem- -porary files was complex and I never fixed all the bugs in it. -(AT&T has been maintaining the Bourne shell for more than ten -years, and to the best of my knowledge they still haven't gotten -it to handle temporary files correctly in obscure cases.) - -The text field of a NARG structure points to the text of the -word. The text consists of ordinary characters and a number of -special codes defined in parser.h. The special codes are: - - CTLVAR Variable substitution - CTLENDVAR End of variable substitution - CTLBACKQ Command substitution - CTLESC Escape next character - -A variable substitution contains the following elements: - - CTLVAR type name '=' [ alternative-text CTLENDVAR ] - -The type field is a single character specifying the type of sub- -stitution. The possible types are: - - VSNORMAL $var - VSMINUS ${var-text} - VSMINUS|VSNUL ${var:-text} - VSPLUS ${var+text} - VSPLUS|VSNUL ${var:+text} - VSQUESTION ${var?text} - VSQUESTION|VSNUL ${var:?text} - VSASSIGN ${var=text} - VSASSIGN|VSNUL ${var=text} - -The name of the variable comes next, terminated by an equals -sign. If the type is not VSNORMAL, then the text field in the -substitution follows, terminated by a CTLENDVAR byte. - -Commands in back quotes are parsed and stored in a linked list. -The locations of these commands in the string are indicated by -the CTLBACKQ character. - -The character CTLESC escapes the next character, so that in case -any of the CTL characters mentioned above appear in the input, -they can be passed through transparently. CTLESC is also used to -escape '*', '?', '[', and '!' characters which were quoted by the -user and thus should not be used for file name generation. - -CTLESC characters have proved to be particularly tricky to get -right. In the case of here documents which are not subject to -variable and command substitution, the parser doesn't insert any -CTLESC characters to begin with (so the contents of the text -field can be written without any processing). Other here docu- -ments, and words which are not subject to splitting and file name -generation, have the CTLESC characters removed during the vari- -able and command substitution phase. Words which are subject -splitting and file name generation have the CTLESC characters re- -moved as part of the file name phase. - -EXECUTION: Command execution is handled by the following files: - eval.c The top level routines. - redir.c Code to handle redirection of input and output. - jobs.c Code to handle forking, waiting, and job control. - exec.c Code to path searches and the actual exec sys call. - expand.c Code to evaluate arguments. - var.c Maintains the variable symbol table. Called from expand.c. - -EVAL.C: Evaltree recursively executes a parse tree. The exit -status is returned in the global variable exitstatus. The alter- -native entry evalbackcmd is called to evaluate commands in back -quotes. It saves the result in memory if the command is a buil- -tin; otherwise it forks off a child to execute the command and -connects the standard output of the child to a pipe. - -JOBS.C: To create a process, you call makejob to return a job -structure, and then call forkshell (passing the job structure as -an argument) to create the process. Waitforjob waits for a job -to complete. These routines take care of process groups if job -control is defined. - -REDIR.C: Ash allows file descriptors to be redirected and then -restored without forking off a child process. This is accom- -plished by duplicating the original file descriptors. The redir- -tab structure records where the file descriptors have be dupli- -cated to. - -EXEC.C: The routine find_command locates a command, and enters -the command in the hash table if it is not already there. The -third argument specifies whether it is to print an error message -if the command is not found. (When a pipeline is set up, -find_command is called for all the commands in the pipeline be- -fore any forking is done, so to get the commands into the hash -table of the parent process. But to make command hashing as -transparent as possible, we silently ignore errors at that point -and only print error messages if the command cannot be found -later.) - -The routine shellexec is the interface to the exec system call. - -EXPAND.C: Arguments are processed in three passes. The first -(performed by the routine argstr) performs variable and command -substitution. The second (ifsbreakup) performs word splitting -and the third (expandmeta) performs file name generation. If the -"/u" directory is simulated, then when "/u/username" is replaced -by the user's home directory, the flag "didudir" is set. This -tells the cd command that it should print out the directory name, -just as it would if the "/u" directory were implemented using -symbolic links. - -VAR.C: Variables are stored in a hash table. Probably we should -switch to extensible hashing. The variable name is stored in the -same string as the value (using the format "name=value") so that -no string copying is needed to create the environment of a com- -mand. Variables which the shell references internally are preal- -located so that the shell can reference the values of these vari- -ables without doing a lookup. - -When a program is run, the code in eval.c sticks any environment -variables which precede the command (as in "PATH=xxx command") in -the variable table as the simplest way to strip duplicates, and -then calls "environment" to get the value of the environment. -There are two consequences of this. First, if an assignment to -PATH precedes the command, the value of PATH before the assign- -ment must be remembered and passed to shellexec. Second, if the -program turns out to be a shell procedure, the strings from the -environment variables which preceded the command must be pulled -out of the table and replaced with strings obtained from malloc, -since the former will automatically be freed when the stack (see -the entry on memalloc.c) is emptied. - -BUILTIN COMMANDS: The procedures for handling these are scat- -tered throughout the code, depending on which location appears -most appropriate. They can be recognized because their names al- -ways end in "cmd". The mapping from names to procedures is -specified in the file builtins, which is processed by the mkbuil- -tins command. - -A builtin command is invoked with argc and argv set up like a -normal program. A builtin command is allowed to overwrite its -arguments. Builtin routines can call nextopt to do option pars- -ing. This is kind of like getopt, but you don't pass argc and -argv to it. Builtin routines can also call error. This routine -normally terminates the shell (or returns to the main command -loop if the shell is interactive), but when called from a builtin -command it causes the builtin command to terminate with an exit -status of 2. - -The directory bltins contains commands which can be compiled in- -dependently but can also be built into the shell for efficiency -reasons. The makefile in this directory compiles these programs -in the normal fashion (so that they can be run regardless of -whether the invoker is ash), but also creates a library named -bltinlib.a which can be linked with ash. The header file bltin.h -takes care of most of the differences between the ash and the -stand-alone environment. The user should call the main routine -"main", and #define main to be the name of the routine to use -when the program is linked into ash. This #define should appear -before bltin.h is included; bltin.h will #undef main if the pro- -gram is to be compiled stand-alone. - -CD.C: This file defines the cd and pwd builtins. The pwd com- -mand runs /bin/pwd the first time it is invoked (unless the user -has already done a cd to an absolute pathname), but then -remembers the current directory and updates it when the cd com- -mand is run, so subsequent pwd commands run very fast. The main -complication in the cd command is in the docd command, which -resolves symbolic links into actual names and informs the user -where the user ended up if he crossed a symbolic link. - -SIGNALS: Trap.c implements the trap command. The routine set- -signal figures out what action should be taken when a signal is -received and invokes the signal system call to set the signal ac- -tion appropriately. When a signal that a user has set a trap for -is caught, the routine "onsig" sets a flag. The routine dotrap -is called at appropriate points to actually handle the signal. -When an interrupt is caught and no trap has been set for that -signal, the routine "onint" in error.c is called. - -OUTPUT: Ash uses it's own output routines. There are three out- -put structures allocated. "Output" represents the standard out- -put, "errout" the standard error, and "memout" contains output -which is to be stored in memory. This last is used when a buil- -tin command appears in backquotes, to allow its output to be col- -lected without doing any I/O through the UNIX operating system. -The variables out1 and out2 normally point to output and errout, -respectively, but they are set to point to memout when appropri- -ate inside backquotes. - -INPUT: The basic input routine is pgetc, which reads from the -current input file. There is a stack of input files; the current -input file is the top file on this stack. The code allows the -input to come from a string rather than a file. (This is for the --c option and the "." and eval builtin commands.) The global -variable plinno is saved and restored when files are pushed and -popped from the stack. The parser routines store the number of -the current line in this variable. - -DEBUGGING: If DEBUG is defined in shell.h, then the shell will -write debugging information to the file $HOME/trace. Most of -this is done using the TRACE macro, which takes a set of printf -arguments inside two sets of parenthesis. Example: -"TRACE(("n=%d0, n))". The double parenthesis are necessary be- -cause the preprocessor can't handle functions with a variable -number of arguments. Defining DEBUG also causes the shell to -generate a core dump if it is sent a quit signal. The tracing -code is in show.c. diff --git a/bin/dash/src/alias.c b/bin/dash/src/alias.c deleted file mode 100644 index daeacbb8..00000000 --- a/bin/dash/src/alias.c +++ /dev/null @@ -1,227 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <stdlib.h> -#include "shell.h" -#include "input.h" -#include "output.h" -#include "error.h" -#include "memalloc.h" -#include "mystring.h" -#include "alias.h" -#include "options.h" /* XXX for argptr (should remove?) */ - -#define ATABSIZE 39 - -struct alias *atab[ATABSIZE]; - -STATIC void setalias(const char *, const char *); -STATIC struct alias *freealias(struct alias *); -STATIC struct alias **__lookupalias(const char *); - -STATIC -void -setalias(const char *name, const char *val) -{ - struct alias *ap, **app; - - app = __lookupalias(name); - ap = *app; - INTOFF; - if (ap) { - if (!(ap->flag & ALIASINUSE)) { - ckfree(ap->val); - } - ap->val = savestr(val); - ap->flag &= ~ALIASDEAD; - } else { - /* not found */ - ap = ckmalloc(sizeof (struct alias)); - ap->name = savestr(name); - ap->val = savestr(val); - ap->flag = 0; - ap->next = 0; - *app = ap; - } - INTON; -} - -int -unalias(const char *name) -{ - struct alias **app; - - app = __lookupalias(name); - - if (*app) { - INTOFF; - *app = freealias(*app); - INTON; - return (0); - } - - return (1); -} - -void -rmaliases(void) -{ - struct alias *ap, **app; - int i; - - INTOFF; - for (i = 0; i < ATABSIZE; i++) { - app = &atab[i]; - for (ap = *app; ap; ap = *app) { - *app = freealias(*app); - if (ap == *app) { - app = &ap->next; - } - } - } - INTON; -} - -struct alias * -lookupalias(const char *name, int check) -{ - struct alias *ap = *__lookupalias(name); - - if (check && ap && (ap->flag & ALIASINUSE)) - return (NULL); - return (ap); -} - -/* - * TODO - sort output - */ -int -aliascmd(int argc, char **argv) -{ - char *n, *v; - int ret = 0; - struct alias *ap; - - if (argc == 1) { - int i; - - for (i = 0; i < ATABSIZE; i++) - for (ap = atab[i]; ap; ap = ap->next) { - printalias(ap); - } - return (0); - } - while ((n = *++argv) != NULL) { - if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */ - if ((ap = *__lookupalias(n)) == NULL) { - outfmt(out2, "%s: %s not found\n", "alias", n); - ret = 1; - } else - printalias(ap); - } else { - *v++ = '\0'; - setalias(n, v); - } - } - - return (ret); -} - -int -unaliascmd(int argc, char **argv) -{ - int i; - - while ((i = nextopt("a")) != '\0') { - if (i == 'a') { - rmaliases(); - return (0); - } - } - for (i = 0; *argptr; argptr++) { - if (unalias(*argptr)) { - outfmt(out2, "%s: %s not found\n", "unalias", *argptr); - i = 1; - } - } - - return (i); -} - -STATIC struct alias * -freealias(struct alias *ap) { - struct alias *next; - - if (ap->flag & ALIASINUSE) { - ap->flag |= ALIASDEAD; - return ap; - } - - next = ap->next; - ckfree(ap->name); - ckfree(ap->val); - ckfree(ap); - return next; -} - -void -printalias(const struct alias *ap) { - out1fmt("%s=%s\n", ap->name, single_quote(ap->val)); -} - -STATIC struct alias ** -__lookupalias(const char *name) { - unsigned int hashval; - struct alias **app; - const char *p; - unsigned int ch; - - p = name; - - ch = (unsigned char)*p; - hashval = ch << 4; - while (ch) { - hashval += ch; - ch = (unsigned char)*++p; - } - app = &atab[hashval % ATABSIZE]; - - for (; *app; app = &(*app)->next) { - if (equal(name, (*app)->name)) { - break; - } - } - - return app; -} diff --git a/bin/dash/src/alias.h b/bin/dash/src/alias.h deleted file mode 100644 index fb841d64..00000000 --- a/bin/dash/src/alias.h +++ /dev/null @@ -1,52 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)alias.h 8.2 (Berkeley) 5/4/95 - */ - -#define ALIASINUSE 1 -#define ALIASDEAD 2 - -struct alias { - struct alias *next; - char *name; - char *val; - int flag; -}; - -struct alias *lookupalias(const char *, int); -int aliascmd(int, char **); -int unaliascmd(int, char **); -void rmaliases(void); -int unalias(const char *); -void printalias(const struct alias *); diff --git a/bin/dash/src/arith_yacc.c b/bin/dash/src/arith_yacc.c deleted file mode 100644 index 1a087c32..00000000 --- a/bin/dash/src/arith_yacc.c +++ /dev/null @@ -1,304 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 2007 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <inttypes.h> -#include <stdlib.h> -#include "arith_yacc.h" -#include "expand.h" -#include "shell.h" -#include "error.h" -#include "output.h" -#include "var.h" - -#if ARITH_BOR + 11 != ARITH_BORASS || ARITH_ASS + 11 != ARITH_EQ -#error Arithmetic tokens are out of order. -#endif - -static const char *arith_startbuf; - -const char *arith_buf; -union yystype yylval; - -static int last_token; - -#define ARITH_PRECEDENCE(op, prec) [op - ARITH_BINOP_MIN] = prec - -static const char prec[ARITH_BINOP_MAX - ARITH_BINOP_MIN] = { - ARITH_PRECEDENCE(ARITH_MUL, 0), - ARITH_PRECEDENCE(ARITH_DIV, 0), - ARITH_PRECEDENCE(ARITH_REM, 0), - ARITH_PRECEDENCE(ARITH_ADD, 1), - ARITH_PRECEDENCE(ARITH_SUB, 1), - ARITH_PRECEDENCE(ARITH_LSHIFT, 2), - ARITH_PRECEDENCE(ARITH_RSHIFT, 2), - ARITH_PRECEDENCE(ARITH_LT, 3), - ARITH_PRECEDENCE(ARITH_LE, 3), - ARITH_PRECEDENCE(ARITH_GT, 3), - ARITH_PRECEDENCE(ARITH_GE, 3), - ARITH_PRECEDENCE(ARITH_EQ, 4), - ARITH_PRECEDENCE(ARITH_NE, 4), - ARITH_PRECEDENCE(ARITH_BAND, 5), - ARITH_PRECEDENCE(ARITH_BXOR, 6), - ARITH_PRECEDENCE(ARITH_BOR, 7), -}; - -#define ARITH_MAX_PREC 8 - -static void yyerror(const char *s) __attribute__ ((noreturn)); -static void yyerror(const char *s) -{ - sh_error("arithmetic expression: %s: \"%s\"", s, arith_startbuf); - /* NOTREACHED */ -} - -static inline int arith_prec(int op) -{ - return prec[op - ARITH_BINOP_MIN]; -} - -static inline int higher_prec(int op1, int op2) -{ - return arith_prec(op1) < arith_prec(op2); -} - -static intmax_t do_binop(int op, intmax_t a, intmax_t b) -{ - switch (op) { - default: - case ARITH_REM: - case ARITH_DIV: - if (!b) - yyerror("division by zero"); - return op == ARITH_REM ? a % b : a / b; - case ARITH_MUL: - return a * b; - case ARITH_ADD: - return a + b; - case ARITH_SUB: - return a - b; - case ARITH_LSHIFT: - return a << b; - case ARITH_RSHIFT: - return a >> b; - case ARITH_LT: - return a < b; - case ARITH_LE: - return a <= b; - case ARITH_GT: - return a > b; - case ARITH_GE: - return a >= b; - case ARITH_EQ: - return a == b; - case ARITH_NE: - return a != b; - case ARITH_BAND: - return a & b; - case ARITH_BXOR: - return a ^ b; - case ARITH_BOR: - return a | b; - } -} - -static intmax_t assignment(int var, int noeval); - -static intmax_t primary(int token, union yystype *val, int op, int noeval) -{ - intmax_t result; - -again: - switch (token) { - case ARITH_LPAREN: - result = assignment(op, noeval); - if (last_token != ARITH_RPAREN) - yyerror("expecting ')'"); - last_token = yylex(); - return result; - case ARITH_NUM: - last_token = op; - return val->val; - case ARITH_VAR: - last_token = op; - return noeval ? val->val : lookupvarint(val->name); - case ARITH_ADD: - token = op; - *val = yylval; - op = yylex(); - goto again; - case ARITH_SUB: - *val = yylval; - return -primary(op, val, yylex(), noeval); - case ARITH_NOT: - *val = yylval; - return !primary(op, val, yylex(), noeval); - case ARITH_BNOT: - *val = yylval; - return ~primary(op, val, yylex(), noeval); - default: - yyerror("expecting primary"); - } -} - -static intmax_t binop2(intmax_t a, int op, int prec, int noeval) -{ - for (;;) { - union yystype val; - intmax_t b; - int op2; - int token; - - token = yylex(); - val = yylval; - - b = primary(token, &val, yylex(), noeval); - - op2 = last_token; - if (op2 >= ARITH_BINOP_MIN && op2 < ARITH_BINOP_MAX && - higher_prec(op2, op)) { - b = binop2(b, op2, arith_prec(op), noeval); - op2 = last_token; - } - - a = noeval ? b : do_binop(op, a, b); - - if (op2 < ARITH_BINOP_MIN || op2 >= ARITH_BINOP_MAX || - arith_prec(op2) >= prec) - return a; - - op = op2; - } -} - -static intmax_t binop(int token, union yystype *val, int op, int noeval) -{ - intmax_t a = primary(token, val, op, noeval); - - op = last_token; - if (op < ARITH_BINOP_MIN || op >= ARITH_BINOP_MAX) - return a; - - return binop2(a, op, ARITH_MAX_PREC, noeval); -} - -static intmax_t and(int token, union yystype *val, int op, int noeval) -{ - intmax_t a = binop(token, val, op, noeval); - intmax_t b; - - op = last_token; - if (op != ARITH_AND) - return a; - - token = yylex(); - *val = yylval; - - b = and(token, val, yylex(), noeval | !a); - - return a && b; -} - -static intmax_t or(int token, union yystype *val, int op, int noeval) -{ - intmax_t a = and(token, val, op, noeval); - intmax_t b; - - op = last_token; - if (op != ARITH_OR) - return a; - - token = yylex(); - *val = yylval; - - b = or(token, val, yylex(), noeval | !!a); - - return a || b; -} - -static intmax_t cond(int token, union yystype *val, int op, int noeval) -{ - intmax_t a = or(token, val, op, noeval); - intmax_t b; - intmax_t c; - - if (last_token != ARITH_QMARK) - return a; - - b = assignment(yylex(), noeval | !a); - - if (last_token != ARITH_COLON) - yyerror("expecting ':'"); - - token = yylex(); - *val = yylval; - - c = cond(token, val, yylex(), noeval | !!a); - - return a ? b : c; -} - -static intmax_t assignment(int var, int noeval) -{ - union yystype val = yylval; - int op = yylex(); - intmax_t result; - - if (var != ARITH_VAR) - return cond(var, &val, op, noeval); - - if (op != ARITH_ASS && (op < ARITH_ASS_MIN || op >= ARITH_ASS_MAX)) - return cond(var, &val, op, noeval); - - result = assignment(yylex(), noeval); - if (noeval) - return result; - - return setvarint(val.name, - op == ARITH_ASS ? result : - do_binop(op - 11, lookupvarint(val.name), result), 0); -} - -intmax_t arith(const char *s) -{ - intmax_t result; - - arith_buf = arith_startbuf = s; - - result = assignment(yylex(), 0); - - if (last_token) - yyerror("expecting EOF"); - - return result; -} diff --git a/bin/dash/src/arith_yacc.h b/bin/dash/src/arith_yacc.h deleted file mode 100644 index ff34d524..00000000 --- a/bin/dash/src/arith_yacc.h +++ /dev/null @@ -1,89 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 2007 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#define ARITH_ASS 1 - -#define ARITH_OR 2 -#define ARITH_AND 3 -#define ARITH_BAD 4 -#define ARITH_NUM 5 -#define ARITH_VAR 6 -#define ARITH_NOT 7 - -#define ARITH_BINOP_MIN 8 -#define ARITH_LE 8 -#define ARITH_GE 9 -#define ARITH_LT 10 -#define ARITH_GT 11 -#define ARITH_EQ 12 -#define ARITH_REM 13 -#define ARITH_BAND 14 -#define ARITH_LSHIFT 15 -#define ARITH_RSHIFT 16 -#define ARITH_MUL 17 -#define ARITH_ADD 18 -#define ARITH_BOR 19 -#define ARITH_SUB 20 -#define ARITH_BXOR 21 -#define ARITH_DIV 22 -#define ARITH_NE 23 -#define ARITH_BINOP_MAX 24 - -#define ARITH_ASS_MIN 24 -#define ARITH_REMASS 24 -#define ARITH_BANDASS 25 -#define ARITH_LSHIFTASS 26 -#define ARITH_RSHIFTASS 27 -#define ARITH_MULASS 28 -#define ARITH_ADDASS 29 -#define ARITH_BORASS 30 -#define ARITH_SUBASS 31 -#define ARITH_BXORASS 32 -#define ARITH_DIVASS 33 -#define ARITH_ASS_MAX 34 - -#define ARITH_LPAREN 34 -#define ARITH_RPAREN 35 -#define ARITH_BNOT 36 -#define ARITH_QMARK 37 -#define ARITH_COLON 38 - -union yystype { - intmax_t val; - char *name; -}; - -extern union yystype yylval; - -int yylex(void); diff --git a/bin/dash/src/arith_yylex.c b/bin/dash/src/arith_yylex.c deleted file mode 100644 index ec5b5b25..00000000 --- a/bin/dash/src/arith_yylex.c +++ /dev/null @@ -1,240 +0,0 @@ -/*- - * Copyright (c) 2002 - * Herbert Xu. - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <inttypes.h> -#include <stdlib.h> -#include <string.h> -#include "arith_yacc.h" -#include "expand.h" -#include "error.h" -#include "shell.h" -#include "memalloc.h" -#include "syntax.h" -#include "system.h" - -#if ARITH_BOR + 11 != ARITH_BORASS || ARITH_ASS + 11 != ARITH_EQ -#error Arithmetic tokens are out of order. -#endif - -extern const char *arith_buf; - -int -yylex() -{ - int value; - const char *buf = arith_buf; - const char *p; - - for (;;) { - value = *buf; - switch (value) { - case ' ': - case '\t': - case '\n': - buf++; - continue; - default: - return ARITH_BAD; - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': - yylval.val = strtoimax(buf, (char **)&arith_buf, 0); - return ARITH_NUM; - case 'A': - case 'B': - case 'C': - case 'D': - case 'E': - case 'F': - case 'G': - case 'H': - case 'I': - case 'J': - case 'K': - case 'L': - case 'M': - case 'N': - case 'O': - case 'P': - case 'Q': - case 'R': - case 'S': - case 'T': - case 'U': - case 'V': - case 'W': - case 'X': - case 'Y': - case 'Z': - case '_': - case 'a': - case 'b': - case 'c': - case 'd': - case 'e': - case 'f': - case 'g': - case 'h': - case 'i': - case 'j': - case 'k': - case 'l': - case 'm': - case 'n': - case 'o': - case 'p': - case 'q': - case 'r': - case 's': - case 't': - case 'u': - case 'v': - case 'w': - case 'x': - case 'y': - case 'z': - p = buf; - while (buf++, is_in_name(*buf)) - ; - yylval.name = stalloc(buf - p + 1); - *(char *)mempcpy(yylval.name, p, buf - p) = 0; - value = ARITH_VAR; - goto out; - case '=': - value += ARITH_ASS - '='; -checkeq: - buf++; -checkeqcur: - if (*buf != '=') - goto out; - value += 11; - break; - case '>': - switch (*++buf) { - case '=': - value += ARITH_GE - '>'; - break; - case '>': - value += ARITH_RSHIFT - '>'; - goto checkeq; - default: - value += ARITH_GT - '>'; - goto out; - } - break; - case '<': - switch (*++buf) { - case '=': - value += ARITH_LE - '<'; - break; - case '<': - value += ARITH_LSHIFT - '<'; - goto checkeq; - default: - value += ARITH_LT - '<'; - goto out; - } - break; - case '|': - if (*++buf != '|') { - value += ARITH_BOR - '|'; - goto checkeqcur; - } - value += ARITH_OR - '|'; - break; - case '&': - if (*++buf != '&') { - value += ARITH_BAND - '&'; - goto checkeqcur; - } - value += ARITH_AND - '&'; - break; - case '!': - if (*++buf != '=') { - value += ARITH_NOT - '!'; - goto out; - } - value += ARITH_NE - '!'; - break; - case 0: - goto out; - case '(': - value += ARITH_LPAREN - '('; - break; - case ')': - value += ARITH_RPAREN - ')'; - break; - case '*': - value += ARITH_MUL - '*'; - goto checkeq; - case '/': - value += ARITH_DIV - '/'; - goto checkeq; - case '%': - value += ARITH_REM - '%'; - goto checkeq; - case '+': - value += ARITH_ADD - '+'; - goto checkeq; - case '-': - value += ARITH_SUB - '-'; - goto checkeq; - case '~': - value += ARITH_BNOT - '~'; - break; - case '^': - value += ARITH_BXOR - '^'; - goto checkeq; - case '?': - value += ARITH_QMARK - '?'; - break; - case ':': - value += ARITH_COLON - ':'; - break; - } - break; - } - - buf++; -out: - arith_buf = buf; - return value; -} diff --git a/bin/dash/src/bltin/bltin.h b/bin/dash/src/bltin/bltin.h deleted file mode 100644 index f5ac06f2..00000000 --- a/bin/dash/src/bltin/bltin.h +++ /dev/null @@ -1,89 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)bltin.h 8.1 (Berkeley) 5/31/93 - */ - -/* - * This file is included by programs which are optionally built into the - * shell. If SHELL is defined, we try to map the standard UNIX library - * routines to ash routines using defines. - */ - -#include "../shell.h" -#include "../mystring.h" -#include "../options.h" -#ifdef SHELL -#include "../memalloc.h" -#include "../output.h" -#include "../error.h" -#ifndef USE_GLIBC_STDIO -#undef stdout -#undef stderr -#undef putc -#undef putchar -#undef fileno -#define stdout out1 -#define stderr out2 -#define printf out1fmt -#define putc(c, file) outc(c, file) -#define putchar(c) out1c(c) -#define FILE struct output -#define fprintf outfmt -#define fputs outstr -#define fflush flushout -#define fileno(f) ((f)->fd) -#define ferror outerr -#endif -#define INITARGS(argv) -#define error sh_error -#define warn sh_warn -#define warnx sh_warnx -#define exit sh_exit -#define setprogname(s) -#define getprogname() commandname -#define setlocate(l,s) 0 - -#define getenv(p) bltinlookup((p),0) - -#else -#undef NULL -#include <stdio.h> -#undef main -#define INITARGS(argv) if ((commandname = argv[0]) == NULL) {fputs("Argc is zero\n", stderr); exit(2);} else -#endif - -int echocmd(int, char **); - - -extern const char *commandname; diff --git a/bin/dash/src/bltin/echo.1 b/bin/dash/src/bltin/echo.1 deleted file mode 100644 index fbc7fb43..00000000 --- a/bin/dash/src/bltin/echo.1 +++ /dev/null @@ -1,109 +0,0 @@ -.\" Copyright (c) 1991, 1993 -.\" The Regents of the University of California. All rights reserved. -.\" Copyright (c) 1997-2005 -.\" Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" Kenneth Almquist. -.\" Copyright 1989 by Kenneth Almquist -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)echo.1 8.1 (Berkeley) 5/31/93 -.\" -.Dd May 31, 1993 -.Dt ECHO 1 -.Os -.Sh NAME -.Nm echo -.Nd produce message in a shell script -.Sh SYNOPSIS -.Nm -.Op Fl n | Fl e -.Ar args ... -.Sh DESCRIPTION -.Nm -prints its arguments on the standard output, separated by spaces. -Unless the -.Fl n -option is present, a newline is output following the arguments. -The -.Fl e -option causes -.Nm -to treat the escape sequences specially, as described in the following -paragraph. -The -.Fl e -option is the default, and is provided solely for compatibility with -other systems. -Only one of the options -.Fl n -and -.Fl e -may be given. -.Pp -If any of the following sequences of characters is encountered during -output, the sequence is not output. Instead, the specified action is -performed: -.Bl -tag -width indent -.It Li \eb -A backspace character is output. -.It Li \ec -Subsequent output is suppressed. This is normally used at the end of the -last argument to suppress the trailing newline that -.Nm -would otherwise output. -.It Li \ef -Output a form feed. -.It Li \en -Output a newline character. -.It Li \er -Output a carriage return. -.It Li \et -Output a (horizontal) tab character. -.It Li \ev -Output a vertical tab. -.It Li \e0 Ns Ar digits -Output the character whose value is given by zero to three digits. -If there are zero digits, a nul character is output. -.It Li \e\e -Output a backslash. -.El -.Sh HINTS -Remember that backslash is special to the shell and needs to be escaped. -To output a message to standard error, say -.Pp -.D1 echo message \*[Gt]\*[Am]2 -.Sh BUGS -The octal character escape mechanism -.Pq Li \e0 Ns Ar digits -differs from the -C language mechanism. -.Pp -There is no way to force -.Nm -to treat its arguments literally, rather than interpreting them as -options and escape sequences. diff --git a/bin/dash/src/bltin/printf.1 b/bin/dash/src/bltin/printf.1 deleted file mode 100644 index 38731732..00000000 --- a/bin/dash/src/bltin/printf.1 +++ /dev/null @@ -1,354 +0,0 @@ -.\" Copyright (c) 1989, 1990, 1993 -.\" The Regents of the University of California. All rights reserved. -.\" Copyright (c) 1997-2005 -.\" Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" the Institute of Electrical and Electronics Engineers, Inc. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" from: @(#)printf.1 8.1 (Berkeley) 6/6/93 -.\" -.Dd November 5, 1993 -.Dt PRINTF 1 -.Os -.Sh NAME -.Nm printf -.Nd formatted output -.Sh SYNOPSIS -.Nm -.Ar format -.Op Ar arguments ... -.Sh DESCRIPTION -.Nm -formats and prints its arguments, after the first, under control -of the -.Ar format . -The -.Ar format -is a character string which contains three types of objects: plain characters, -which are simply copied to standard output, character escape sequences which -are converted and copied to the standard output, and format specifications, -each of which causes printing of the next successive -.Ar argument . -.Pp -The -.Ar arguments -after the first are treated as strings if the corresponding format is -either -.Cm b , -.Cm B , -.Cm c -or -.Cm s ; -otherwise it is evaluated as a C constant, with the following extensions: -.Pp -.Bl -bullet -offset indent -compact -.It -A leading plus or minus sign is allowed. -.It -If the leading character is a single or double quote, the value is the -.Tn ASCII -code of the next character. -.El -.Pp -The format string is reused as often as necessary to satisfy the -.Ar arguments . -Any extra format specifications are evaluated with zero or the null -string. -.Pp -Character escape sequences are in backslash notation as defined in -.St -ansiC . -The characters and their meanings are as follows: -.Bl -tag -width Ds -offset indent -.It Cm \ee -Write an \*[Lt]escape\*[Gt] character. -.It Cm \ea -Write a \*[Lt]bell\*[Gt] character. -.It Cm \eb -Write a \*[Lt]backspace\*[Gt] character. -.It Cm \ef -Write a \*[Lt]form-feed\*[Gt] character. -.It Cm \en -Write a \*[Lt]new-line\*[Gt] character. -.It Cm \er -Write a \*[Lt]carriage return\*[Gt] character. -.It Cm \et -Write a \*[Lt]tab\*[Gt] character. -.It Cm \ev -Write a \*[Lt]vertical tab\*[Gt] character. -.It Cm \e\' -Write a \*[Lt]single quote\*[Gt] character. -.It Cm \e" -Write a \*[Lt]double quote\*[Gt] character. -.It Cm \e\e -Write a backslash character. -.It Cm \e Ns Ar num -Write an 8\-bit character whose -.Tn ASCII -value is the 1\-, 2\-, or 3\-digit octal number -.Ar num . -.It Cm \ex Ns Ar xx -Write an 8\-bit character whose -.Tn ASCII -value is the 1\- or 2\-digit hexadecimal number -.Ar xx . -.El -.Pp -Each format specification is introduced by the percent character -(``%''). -The remainder of the format specification includes, -in the following order: -.Bl -tag -width Ds -.It "Zero or more of the following flags:" -.Bl -tag -width Ds -.It Cm # -A `#' character -specifying that the value should be printed in an ``alternative form''. -For -.Cm b , -.Cm c , -.Cm d , -and -.Cm s -formats, this option has no effect. -For the -.Cm o -format the precision of the number is increased to force the first -character of the output string to a zero. -For the -.Cm x -.Pq Cm X -format, a non-zero result has the string -.Li 0x -.Pq Li 0X -prepended to it. -For -.Cm e , -.Cm E , -.Cm f , -.Cm g , -and -.Cm G -formats, the result will always contain a decimal point, even if no -digits follow the point (normally, a decimal point only appears in the -results of those formats if a digit follows the decimal point). -For -.Cm g -and -.Cm G -formats, trailing zeros are not removed from the result as they -would otherwise be. -.\" I turned this off - decided it isn't a valid use of '#' -.\" For the -.\" .Cm B -.\" format, backslash-escape sequences are expanded first; -.It Cm \&\- -A minus sign `\-' which specifies -.Em left adjustment -of the output in the indicated field; -.It Cm \&+ -A `+' character specifying that there should always be -a sign placed before the number when using signed formats. -.It Sq \&\ \& -A space specifying that a blank should be left before a positive number -for a signed format. -A `+' overrides a space if both are used; -.It Cm \&0 -A zero `0' character indicating that zero-padding should be used -rather than blank-padding. -A `\-' overrides a `0' if both are used; -.El -.It "Field Width:" -An optional digit string specifying a -.Em field width ; -if the output string has fewer characters than the field width it will -be blank-padded on the left (or right, if the left-adjustment indicator -has been given) to make up the field width (note that a leading zero -is a flag, but an embedded zero is part of a field width); -.It Precision : -An optional period, -.Sq Cm \&.\& , -followed by an optional digit string giving a -.Em precision -which specifies the number of digits to appear after the decimal point, -for -.Cm e -and -.Cm f -formats, or the maximum number of characters to be printed -from a string -.Sm off -.Pf ( Cm b No , -.Sm on -.Cm B -and -.Cm s -formats); if the digit string is missing, the precision is treated -as zero; -.It Format : -A character which indicates the type of format to use (one of -.Cm diouxXfwEgGbBcs ) . -.El -.Pp -A field width or precision may be -.Sq Cm \&* -instead of a digit string. -In this case an -.Ar argument -supplies the field width or precision. -.Pp -The format characters and their meanings are: -.Bl -tag -width Fl -.It Cm diouXx -The -.Ar argument -is printed as a signed decimal (d or i), unsigned octal, unsigned decimal, -or unsigned hexadecimal (X or x), respectively. -.It Cm f -The -.Ar argument -is printed in the style -.Sm off -.Pf [\-]ddd Cm \&. No ddd -.Sm on -where the number of d's -after the decimal point is equal to the precision specification for -the argument. -If the precision is missing, 6 digits are given; if the precision -is explicitly 0, no digits and no decimal point are printed. -.It Cm eE -The -.Ar argument -is printed in the style -.Sm off -.Pf [\-]d Cm \&. No ddd Cm e No \\*(Pmdd -.Sm on -where there -is one digit before the decimal point and the number after is equal to -the precision specification for the argument; when the precision is -missing, 6 digits are produced. -An upper-case E is used for an `E' format. -.It Cm gG -The -.Ar argument -is printed in style -.Cm f -or in style -.Cm e -.Pq Cm E -whichever gives full precision in minimum space. -.It Cm b -Characters from the string -.Ar argument -are printed with backslash-escape sequences expanded. -.br -The following additional backslash-escape sequences are supported: -.Bl -tag -width Ds -.It Cm \ec -Causes -.Nm -to ignore any remaining characters in the string operand containing it, -any remaining string operands, and any additional characters in -the format operand. -.It Cm \e0 Ns Ar num -Write an 8\-bit character whose -.Tn ASCII -value is the 1\-, 2\-, or 3\-digit -octal number -.Ar num . -.It Cm \e^ Ns Ar c -Write the control character -.Ar c . -Generates characters `\e000' through `\e037`, and `\e177' (from `\e^?'). -.It Cm \eM\- Ns Ar c -Write the character -.Ar c -with the 8th bit set. -Generates characters `\e241' through `\e376`. -.It Cm \eM^ Ns Ar c -Write the control character -.Ar c -with the 8th bit set. -Generates characters `\e000' through `\e037`, and `\e177' (from `\eM^?'). -.El -.It Cm B -Characters from the string -.Ar argument -are printed with unprintable characters backslash-escaped using the -.Sm off -.Pf ` Cm \e Ar c No ', -.Pf ` Cm \e^ Ar c No ', -.Pf ` Cm \eM\- Ar c No ' -or -.Pf ` Cm \eM^ Ar c No ', -.Sm on -formats described above. -.It Cm c -The first character of -.Ar argument -is printed. -.It Cm s -Characters from the string -.Ar argument -are printed until the end is reached or until the number of characters -indicated by the precision specification is reached; if the -precision is omitted, all characters in the string are printed. -.It Cm \&% -Print a `%'; no argument is used. -.El -.Pp -In no case does a non-existent or small field width cause truncation of -a field; padding takes place only if the specified field width exceeds -the actual width. -.Sh EXIT STATUS -.Nm -exits 0 on success, 1 on failure. -.Sh SEE ALSO -.Xr echo 1 , -.Xr printf 3 , -.Xr printf 9 -.Xr vis 3 -.Sh STANDARDS -The -.Nm -utility conforms to -.St -p1003.1-2001 . -.Pp -Support for the floating point formats and `*' as a field width and precision -are optional in POSIX. -.Pp -The behaviour of the %B format and the \e', \e", \exxx, \ee and -\e[M][\-|^]c escape sequences are undefined in POSIX. -.Sh BUGS -Since the floating point numbers are translated from -.Tn ASCII -to floating-point and -then back again, floating-point precision may be lost. -.Pp -Hexadecimal character constants are restricted to, and should be specified -as, two character constants. This is contrary to the ISO C standard but -does guarantee detection of the end of the constant. diff --git a/bin/dash/src/bltin/printf.c b/bin/dash/src/bltin/printf.c deleted file mode 100644 index 7785735b..00000000 --- a/bin/dash/src/bltin/printf.c +++ /dev/null @@ -1,478 +0,0 @@ -/* - * Copyright (c) 1989, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/types.h> - -#include <ctype.h> -#include <errno.h> -#include <inttypes.h> -#include <limits.h> -#include <stdarg.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -static int conv_escape_str(char *, char **); -static char *conv_escape(char *, int *); -static int getchr(void); -static double getdouble(void); -static uintmax_t getuintmax(int); -static char *getstr(void); -static char *mklong(const char *, const char *); -static void check_conversion(const char *, const char *); - -static int rval; -static char **gargv; - -#define isodigit(c) ((c) >= '0' && (c) <= '7') -#define octtobin(c) ((c) - '0') - -#include "bltin.h" -#include "system.h" - -#define PF(f, func) { \ - switch ((char *)param - (char *)array) { \ - default: \ - (void)printf(f, array[0], array[1], func); \ - break; \ - case sizeof(*param): \ - (void)printf(f, array[0], func); \ - break; \ - case 0: \ - (void)printf(f, func); \ - break; \ - } \ -} - -#define ASPF(sp, f, func) ({ \ - int ret; \ - switch ((char *)param - (char *)array) { \ - default: \ - ret = xasprintf(sp, f, array[0], array[1], func); \ - break; \ - case sizeof(*param): \ - ret = xasprintf(sp, f, array[0], func); \ - break; \ - case 0: \ - ret = xasprintf(sp, f, func); \ - break; \ - } \ - ret; \ -}) - - -static int print_escape_str(const char *f, int *param, int *array, char *s) -{ - struct stackmark smark; - char *p, *q; - int done; - int len; - int total; - - setstackmark(&smark); - done = conv_escape_str(s, &q); - p = stackblock(); - len = q - p; - total = len - 1; - - q[-1] = (!!((f[1] - 's') | done) - 1) & f[2]; - total += !!q[-1]; - if (f[1] == 's') - goto easy; - - p = makestrspace(len, q); - memset(p, 'X', total); - p[total] = 0; - - q = stackblock(); - total = ASPF(&p, f, p); - - len = strchrnul(p, 'X') - p; - memcpy(p + len, q, strspn(p + len, "X")); - -easy: - out1mem(p, total); - - popstackmark(&smark); - return done; -} - - -int printfcmd(int argc, char *argv[]) -{ - char *fmt; - char *format; - int ch; - - rval = 0; - - nextopt(nullstr); - - argv = argptr; - format = *argv; - - if (!format) - error("usage: printf format [arg ...]"); - - gargv = ++argv; - -#define SKIP1 "#-+ 0" -#define SKIP2 "*0123456789" - do { - /* - * Basic algorithm is to scan the format string for conversion - * specifications -- once one is found, find out if the field - * width or precision is a '*'; if it is, gather up value. - * Note, format strings are reused as necessary to use up the - * provided arguments, arguments of zero/null string are - * provided to use up the format string. - */ - - /* find next format specification */ - for (fmt = format; (ch = *fmt++) ;) { - char *start; - char nextch; - int array[2]; - int *param; - - if (ch == '\\') { - int c_ch; - fmt = conv_escape(fmt, &c_ch); - ch = c_ch; - goto pc; - } - if (ch != '%' || (*fmt == '%' && (++fmt || 1))) { -pc: - putchar(ch); - continue; - } - - /* Ok - we've found a format specification, - Save its address for a later printf(). */ - start = fmt - 1; - param = array; - - /* skip to field width */ - fmt += strspn(fmt, SKIP1); - if (*fmt == '*') { - ++fmt; - *param++ = getuintmax(1); - } else { - /* skip to possible '.', - * get following precision - */ - fmt += strspn(fmt, SKIP2); - } - - if (*fmt == '.') { - ++fmt; - if (*fmt == '*') { - ++fmt; - *param++ = getuintmax(1); - } else - fmt += strspn(fmt, SKIP2); - } - - ch = *fmt; - if (!ch) - error("missing format character"); - /* null terminate format string to we can use it - as an argument to printf. */ - nextch = fmt[1]; - fmt[1] = 0; - switch (ch) { - - case 'b': - *fmt = 's'; - /* escape if a \c was encountered */ - if (print_escape_str(start, param, array, - getstr())) - goto out; - *fmt = 'b'; - break; - case 'c': { - int p = getchr(); - PF(start, p); - break; - } - case 's': { - char *p = getstr(); - PF(start, p); - break; - } - case 'd': - case 'i': { - uintmax_t p = getuintmax(1); - start = mklong(start, fmt); - PF(start, p); - break; - } - case 'o': - case 'u': - case 'x': - case 'X': { - uintmax_t p = getuintmax(0); - start = mklong(start, fmt); - PF(start, p); - break; - } - case 'a': - case 'A': - case 'e': - case 'E': - case 'f': - case 'F': - case 'g': - case 'G': { - double p = getdouble(); - PF(start, p); - break; - } - default: - error("%s: invalid directive", start); - } - *++fmt = nextch; - } - } while (gargv != argv && *gargv); - -out: - return rval; -} - - -/* - * Print SysV echo(1) style escape string - * Halts processing string if a \c escape is encountered. - */ -static int -conv_escape_str(char *str, char **sp) -{ - int c; - int ch; - char *cp; - - /* convert string into a temporary buffer... */ - STARTSTACKSTR(cp); - - do { - c = ch = *str++; - if (ch != '\\') - continue; - - c = *str++; - if (c == 'c') { - /* \c as in SYSV echo - abort all processing.... */ - c = ch = 0x100; - continue; - } - - /* - * %b string octal constants are not like those in C. - * They start with a \0, and are followed by 0, 1, 2, - * or 3 octal digits. - */ - if (c == '0' && isodigit(*str)) - str++; - - /* Finally test for sequences valid in the format string */ - str = conv_escape(str - 1, &c); - } while (STPUTC(c, cp), (char)ch); - - *sp = cp; - - return ch; -} - -/* - * Print "standard" escape characters - */ -static char * -conv_escape(char *str, int *conv_ch) -{ - int value; - int ch; - - ch = *str; - - switch (ch) { - default: - if (!isodigit(*str)) { - value = '\\'; - goto out; - } - - ch = 3; - value = 0; - do { - value <<= 3; - value += octtobin(*str++); - } while (isodigit(*str) && --ch); - goto out; - - case '\\': value = '\\'; break; /* backslash */ - case 'a': value = '\a'; break; /* alert */ - case 'b': value = '\b'; break; /* backspace */ - case 'f': value = '\f'; break; /* form-feed */ - case 'n': value = '\n'; break; /* newline */ - case 'r': value = '\r'; break; /* carriage-return */ - case 't': value = '\t'; break; /* tab */ - case 'v': value = '\v'; break; /* vertical-tab */ - } - - str++; -out: - *conv_ch = value; - return str; -} - -static char * -mklong(const char *str, const char *ch) -{ - /* - * Replace a string like "%92.3u" with "%92.3"PRIuMAX. - * - * Although C99 does not guarantee it, we assume PRIiMAX, - * PRIoMAX, PRIuMAX, PRIxMAX, and PRIXMAX are all the same - * as PRIdMAX with the final 'd' replaced by the corresponding - * character. - */ - - char *copy; - size_t len; - - len = ch - str + sizeof(PRIdMAX); - STARTSTACKSTR(copy); - copy = makestrspace(len, copy); - memcpy(copy, str, len - sizeof(PRIdMAX)); - memcpy(copy + len - sizeof(PRIdMAX), PRIdMAX, sizeof(PRIdMAX)); - copy[len - 2] = *ch; - return (copy); -} - -static int -getchr(void) -{ - int val = 0; - - if (*gargv) - val = **gargv++; - return val; -} - -static char * -getstr(void) -{ - char *val = nullstr; - - if (*gargv) - val = *gargv++; - return val; -} - -static uintmax_t -getuintmax(int sign) -{ - uintmax_t val = 0; - char *cp, *ep; - - cp = *gargv; - if (cp == NULL) - goto out; - gargv++; - - val = (unsigned char) cp[1]; - if (*cp == '\"' || *cp == '\'') - goto out; - - errno = 0; - val = sign ? strtoimax(cp, &ep, 0) : strtoumax(cp, &ep, 0); - check_conversion(cp, ep); -out: - return val; -} - -static double -getdouble(void) -{ - double val; - char *cp, *ep; - - cp = *gargv; - if (cp == NULL) - return 0; - gargv++; - - if (*cp == '\"' || *cp == '\'') - return (unsigned char) cp[1]; - - errno = 0; - val = strtod(cp, &ep); - check_conversion(cp, ep); - return val; -} - -static void -check_conversion(const char *s, const char *ep) -{ - if (*ep) { - if (ep == s) - warnx("%s: expected numeric value", s); - else - warnx("%s: not completely converted", s); - rval = 1; - } else if (errno == ERANGE) { - warnx("%s: %s", s, strerror(ERANGE)); - rval = 1; - } -} - -int -echocmd(int argc, char **argv) -{ - const char *lastfmt = snlfmt; - int nonl; - - if (*++argv && equal(*argv, "-n")) { - argv++; - lastfmt = "%s"; - } - - do { - const char *fmt = "%s "; - char *s = *argv; - - if (!s || !*++argv) - fmt = lastfmt; - - nonl = print_escape_str(fmt, NULL, NULL, s ?: nullstr); - } while (!nonl && *argv); - return 0; -} diff --git a/bin/dash/src/bltin/test.1 b/bin/dash/src/bltin/test.1 deleted file mode 100644 index 42435fb3..00000000 --- a/bin/dash/src/bltin/test.1 +++ /dev/null @@ -1,309 +0,0 @@ -.\" Copyright (c) 1991, 1993 -.\" The Regents of the University of California. All rights reserved. -.\" Copyright (c) 1997-2005 -.\" Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" the Institute of Electrical and Electronics Engineers, Inc. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)test.1 8.1 (Berkeley) 5/31/93 -.\" -.Dd May 31, 1993 -.Dt TEST 1 -.Os -.Sh NAME -.Nm test , -.Nm \&[ -.Nd condition evaluation utility -.Sh SYNOPSIS -.Nm test -.Ar expression -.Nm \&[ -.Ar expression Cm ] -.Sh DESCRIPTION -The -.Nm test -utility evaluates the expression and, if it evaluates -to true, returns a zero (true) exit status; otherwise -it returns 1 (false). -If there is no expression, test also -returns 1 (false). -.Pp -All operators and flags are separate arguments to the -.Nm test -utility. -.Pp -The following primaries are used to construct expression: -.Bl -tag -width Ar -.It Fl b Ar file -True if -.Ar file -exists and is a block special -file. -.It Fl c Ar file -True if -.Ar file -exists and is a character -special file. -.It Fl d Ar file -True if -.Ar file -exists and is a directory. -.It Fl e Ar file -True if -.Ar file -exists (regardless of type). -.It Fl f Ar file -True if -.Ar file -exists and is a regular file. -.It Fl g Ar file -True if -.Ar file -exists and its set group ID flag -is set. -.It Fl h Ar file -True if -.Ar file -exists and is a symbolic link. -.It Fl k Ar file -True if -.Ar file -exists and its sticky bit is set. -.It Fl n Ar string -True if the length of -.Ar string -is nonzero. -.It Fl p Ar file -True if -.Ar file -is a named pipe -.Po Tn FIFO Pc . -.It Fl r Ar file -True if -.Ar file -exists and is readable. -.It Fl s Ar file -True if -.Ar file -exists and has a size greater -than zero. -.It Fl t Ar file_descriptor -True if the file whose file descriptor number -is -.Ar file_descriptor -is open and is associated with a terminal. -.It Fl u Ar file -True if -.Ar file -exists and its set user ID flag -is set. -.It Fl w Ar file -True if -.Ar file -exists and is writable. -True -indicates only that the write flag is on. -The file is not writable on a read-only file -system even if this test indicates true. -.It Fl x Ar file -True if -.Ar file -exists and is executable. -True -indicates only that the execute flag is on. -If -.Ar file -is a directory, true indicates that -.Ar file -can be searched. -.It Fl z Ar string -True if the length of -.Ar string -is zero. -.It Fl L Ar file -True if -.Ar file -exists and is a symbolic link. -This operator is retained for compatibility with previous versions of -this program. -Do not rely on its existence; use -.Fl h -instead. -.It Fl O Ar file -True if -.Ar file -exists and its owner matches the effective user id of this process. -.It Fl G Ar file -True if -.Ar file -exists and its group matches the effective group id of this process. -.It Fl S Ar file -True if -.Ar file -exists and is a socket. -.It Ar file1 Fl nt Ar file2 -True if -.Ar file1 -exists and is newer than -.Ar file2 . -.It Ar file1 Fl ot Ar file2 -True if -.Ar file1 -exists and is older than -.Ar file2 . -.It Ar file1 Fl ef Ar file2 -True if -.Ar file1 -and -.Ar file2 -exist and refer to the same file. -.It Ar string -True if -.Ar string -is not the null -string. -.It Ar \&s\&1 Cm \&= Ar \&s\&2 -True if the strings -.Ar \&s\&1 -and -.Ar \&s\&2 -are identical. -.It Ar \&s\&1 Cm \&!= Ar \&s\&2 -True if the strings -.Ar \&s\&1 -and -.Ar \&s\&2 -are not identical. -.It Ar \&s\&1 Cm \&\*[Lt] Ar \&s\&2 -True if string -.Ar \&s\&1 -comes before -.Ar \&s\&2 -based on the ASCII value of their characters. -.It Ar \&s\&1 Cm \&\*[Gt] Ar \&s\&2 -True if string -.Ar \&s\&1 -comes after -.Ar \&s\&2 -based on the ASCII value of their characters. -.It Ar \&n\&1 Fl \&eq Ar \&n\&2 -True if the integers -.Ar \&n\&1 -and -.Ar \&n\&2 -are algebraically -equal. -.It Ar \&n\&1 Fl \&ne Ar \&n\&2 -True if the integers -.Ar \&n\&1 -and -.Ar \&n\&2 -are not -algebraically equal. -.It Ar \&n\&1 Fl \> Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically -greater than the integer -.Ar \&n\&2 . -.It Ar \&n\&1 Fl \&ge Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically -greater than or equal to the integer -.Ar \&n\&2 . -.It Ar \&n\&1 Fl \< Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically less -than the integer -.Ar \&n\&2 . -.It Ar \&n\&1 Fl \&le Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically less -than or equal to the integer -.Ar \&n\&2 . -.El -.Pp -These primaries can be combined with the following operators: -.Bl -tag -width Ar -.It Cm \&! Ar expression -True if -.Ar expression -is false. -.It Ar expression1 Fl a Ar expression2 -True if both -.Ar expression1 -and -.Ar expression2 -are true. -.It Ar expression1 Fl o Ar expression2 -True if either -.Ar expression1 -or -.Ar expression2 -are true. -.It Cm \&( Ns Ar expression Ns Cm \&) -True if expression is true. -.El -.Pp -The -.Fl a -operator has higher precedence than the -.Fl o -operator. -.Sh GRAMMAR AMBIGUITY -The -.Nm test -grammar is inherently ambiguous. -In order to assure a degree of consistency, the cases described in -.St -p1003.2 -section 4.62.4, -are evaluated consistently according to the rules specified in the -standards document. -All other cases are subject to the ambiguity in the command semantics. -.Sh EXIT STATUS -The -.Nm test -utility exits with one of the following values: -.Bl -tag -width Ds -.It 0 -expression evaluated to true. -.It 1 -expression evaluated to false or expression was -missing. -.It \*[Gt]1 -An error occurred. -.El -.Sh STANDARDS -The -.Nm test -utility implements a superset of the -.St -p1003.2 -specification. diff --git a/bin/dash/src/bltin/test.c b/bin/dash/src/bltin/test.c deleted file mode 100644 index c7fc479d..00000000 --- a/bin/dash/src/bltin/test.c +++ /dev/null @@ -1,700 +0,0 @@ -/* - * test(1); version 7-like -- author Erik Baalbergen - * modified by Eric Gisin to be used as built-in. - * modified by Arnold Robbins to add SVR3 compatibility - * (-x -c -b -p -u -g -k) plus Korn's -L -nt -ot -ef and new -S (socket). - * modified by J.T. Conklin for NetBSD. - * - * This program is in the Public Domain. - */ - -#include <sys/stat.h> -#include <sys/types.h> - -#include <fcntl.h> -#include <inttypes.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <stdarg.h> -#include "bltin.h" - -/* test(1) accepts the following grammar: - oexpr ::= aexpr | aexpr "-o" oexpr ; - aexpr ::= nexpr | nexpr "-a" aexpr ; - nexpr ::= primary | "!" primary - primary ::= unary-operator operand - | operand binary-operator operand - | operand - | "(" oexpr ")" - ; - unary-operator ::= "-r"|"-w"|"-x"|"-f"|"-d"|"-c"|"-b"|"-p"| - "-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|"-L"|"-S"; - - binary-operator ::= "="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"| - "-nt"|"-ot"|"-ef"; - operand ::= <any legal UNIX file name> -*/ - -enum token { - EOI, - FILRD, - FILWR, - FILEX, - FILEXIST, - FILREG, - FILDIR, - FILCDEV, - FILBDEV, - FILFIFO, - FILSOCK, - FILSYM, - FILGZ, - FILTT, - FILSUID, - FILSGID, - FILSTCK, - FILNT, - FILOT, - FILEQ, - FILUID, - FILGID, - STREZ, - STRNZ, - STREQ, - STRNE, - STRLT, - STRGT, - INTEQ, - INTNE, - INTGE, - INTGT, - INTLE, - INTLT, - UNOT, - BAND, - BOR, - LPAREN, - RPAREN, - OPERAND -}; - -enum token_types { - UNOP, - BINOP, - BUNOP, - BBINOP, - PAREN -}; - -static struct t_op { - const char *op_text; - short op_num, op_type; -} const ops [] = { - {"-r", FILRD, UNOP}, - {"-w", FILWR, UNOP}, - {"-x", FILEX, UNOP}, - {"-e", FILEXIST,UNOP}, - {"-f", FILREG, UNOP}, - {"-d", FILDIR, UNOP}, - {"-c", FILCDEV,UNOP}, - {"-b", FILBDEV,UNOP}, - {"-p", FILFIFO,UNOP}, - {"-u", FILSUID,UNOP}, - {"-g", FILSGID,UNOP}, - {"-k", FILSTCK,UNOP}, - {"-s", FILGZ, UNOP}, - {"-t", FILTT, UNOP}, - {"-z", STREZ, UNOP}, - {"-n", STRNZ, UNOP}, - {"-h", FILSYM, UNOP}, /* for backwards compat */ - {"-O", FILUID, UNOP}, - {"-G", FILGID, UNOP}, - {"-L", FILSYM, UNOP}, - {"-S", FILSOCK,UNOP}, - {"=", STREQ, BINOP}, - {"!=", STRNE, BINOP}, - {"<", STRLT, BINOP}, - {">", STRGT, BINOP}, - {"-eq", INTEQ, BINOP}, - {"-ne", INTNE, BINOP}, - {"-ge", INTGE, BINOP}, - {"-gt", INTGT, BINOP}, - {"-le", INTLE, BINOP}, - {"-lt", INTLT, BINOP}, - {"-nt", FILNT, BINOP}, - {"-ot", FILOT, BINOP}, - {"-ef", FILEQ, BINOP}, - {"!", UNOT, BUNOP}, - {"-a", BAND, BBINOP}, - {"-o", BOR, BBINOP}, - {"(", LPAREN, PAREN}, - {")", RPAREN, PAREN}, - {0, 0, 0} -}; - -static char **t_wp; -static struct t_op const *t_wp_op; - -static void syntax(const char *, const char *); -static int oexpr(enum token); -static int aexpr(enum token); -static int nexpr(enum token); -static int primary(enum token); -static int binop(void); -static int filstat(char *, enum token); -static enum token t_lex(char **); -static int isoperand(char **); -static int newerf(const char *, const char *); -static int olderf(const char *, const char *); -static int equalf(const char *, const char *); -#ifdef HAVE_FACCESSAT -static int test_file_access(const char *, int); -#else -static int test_access(const struct stat64 *, int); -#endif - -#ifdef HAVE_FACCESSAT -# ifdef HAVE_TRADITIONAL_FACCESSAT -static inline int faccessat_confused_about_superuser(void) { return 1; } -# else -static inline int faccessat_confused_about_superuser(void) { return 0; } -# endif -#endif - -static inline intmax_t getn(const char *s) -{ - return atomax10(s); -} - -static const struct t_op *getop(const char *s) -{ - const struct t_op *op; - - for (op = ops; op->op_text; op++) { - if (strcmp(s, op->op_text) == 0) - return op; - } - - return NULL; -} - -int -testcmd(int argc, char **argv) -{ - const struct t_op *op; - enum token n; - int res = 1; - - if (*argv[0] == '[') { - if (*argv[--argc] != ']') - error("missing ]"); - argv[argc] = NULL; - } - - t_wp_op = NULL; - -recheck: - argv++; - argc--; - - if (argc < 1) - return res; - - /* - * POSIX prescriptions: he who wrote this deserves the Nobel - * peace prize. - */ - switch (argc) { - case 3: - op = getop(argv[1]); - if (op && op->op_type == BINOP) { - n = OPERAND; - goto eval; - } - /* fall through */ - - case 4: - if (!strcmp(argv[0], "(") && !strcmp(argv[argc - 1], ")")) { - argv[--argc] = NULL; - argv++; - argc--; - } else if (!strcmp(argv[0], "!")) { - res = 0; - goto recheck; - } - } - - n = t_lex(argv); - -eval: - t_wp = argv; - res ^= oexpr(n); - argv = t_wp; - - if (argv[0] != NULL && argv[1] != NULL) - syntax(argv[0], "unexpected operator"); - - return res; -} - -static void -syntax(const char *op, const char *msg) -{ - if (op && *op) - error("%s: %s", op, msg); - else - error("%s", msg); -} - -static int -oexpr(enum token n) -{ - int res = 0; - - for (;;) { - res |= aexpr(n); - n = t_lex(t_wp + 1); - if (n != BOR) - break; - n = t_lex(t_wp += 2); - } - return res; -} - -static int -aexpr(enum token n) -{ - int res = 1; - - for (;;) { - if (!nexpr(n)) - res = 0; - n = t_lex(t_wp + 1); - if (n != BAND) - break; - n = t_lex(t_wp += 2); - } - return res; -} - -static int -nexpr(enum token n) -{ - if (n != UNOT) - return primary(n); - - n = t_lex(t_wp + 1); - if (n != EOI) - t_wp++; - return !nexpr(n); -} - -static int -primary(enum token n) -{ - enum token nn; - int res; - - if (n == EOI) - return 0; /* missing expression */ - if (n == LPAREN) { - if ((nn = t_lex(++t_wp)) == RPAREN) - return 0; /* missing expression */ - res = oexpr(nn); - if (t_lex(++t_wp) != RPAREN) - syntax(NULL, "closing paren expected"); - return res; - } - if (t_wp_op && t_wp_op->op_type == UNOP) { - /* unary expression */ - if (*++t_wp == NULL) - syntax(t_wp_op->op_text, "argument expected"); - switch (n) { - case STREZ: - return strlen(*t_wp) == 0; - case STRNZ: - return strlen(*t_wp) != 0; - case FILTT: - return isatty(getn(*t_wp)); -#ifdef HAVE_FACCESSAT - case FILRD: - return test_file_access(*t_wp, R_OK); - case FILWR: - return test_file_access(*t_wp, W_OK); - case FILEX: - return test_file_access(*t_wp, X_OK); -#endif - default: - return filstat(*t_wp, n); - } - } - - if (t_lex(t_wp + 1), t_wp_op && t_wp_op->op_type == BINOP) { - return binop(); - } - - return strlen(*t_wp) > 0; -} - -static int -binop(void) -{ - const char *opnd1, *opnd2; - struct t_op const *op; - - opnd1 = *t_wp; - (void) t_lex(++t_wp); - op = t_wp_op; - - if ((opnd2 = *++t_wp) == (char *)0) - syntax(op->op_text, "argument expected"); - - switch (op->op_num) { - default: -#ifdef DEBUG - abort(); - /* NOTREACHED */ -#endif - case STREQ: - return strcmp(opnd1, opnd2) == 0; - case STRNE: - return strcmp(opnd1, opnd2) != 0; - case STRLT: - return strcmp(opnd1, opnd2) < 0; - case STRGT: - return strcmp(opnd1, opnd2) > 0; - case INTEQ: - return getn(opnd1) == getn(opnd2); - case INTNE: - return getn(opnd1) != getn(opnd2); - case INTGE: - return getn(opnd1) >= getn(opnd2); - case INTGT: - return getn(opnd1) > getn(opnd2); - case INTLE: - return getn(opnd1) <= getn(opnd2); - case INTLT: - return getn(opnd1) < getn(opnd2); - case FILNT: - return newerf (opnd1, opnd2); - case FILOT: - return olderf (opnd1, opnd2); - case FILEQ: - return equalf (opnd1, opnd2); - } -} - -static int -filstat(char *nm, enum token mode) -{ - struct stat64 s; - - if (mode == FILSYM ? lstat64(nm, &s) : stat64(nm, &s)) - return 0; - - switch (mode) { -#ifndef HAVE_FACCESSAT - case FILRD: - return test_access(&s, R_OK); - case FILWR: - return test_access(&s, W_OK); - case FILEX: - return test_access(&s, X_OK); -#endif - case FILEXIST: - return 1; - case FILREG: - return S_ISREG(s.st_mode); - case FILDIR: - return S_ISDIR(s.st_mode); - case FILCDEV: - return S_ISCHR(s.st_mode); - case FILBDEV: - return S_ISBLK(s.st_mode); - case FILFIFO: - return S_ISFIFO(s.st_mode); - case FILSOCK: - return S_ISSOCK(s.st_mode); - case FILSYM: - return S_ISLNK(s.st_mode); - case FILSUID: - return (s.st_mode & S_ISUID) != 0; - case FILSGID: - return (s.st_mode & S_ISGID) != 0; - case FILSTCK: - return (s.st_mode & S_ISVTX) != 0; - case FILGZ: - return !!s.st_size; - case FILUID: - return s.st_uid == geteuid(); - case FILGID: - return s.st_gid == getegid(); - default: - return 1; - } -} - -static enum token t_lex(char **tp) -{ - struct t_op const *op; - char *s = *tp; - - if (s == 0) { - t_wp_op = (struct t_op *)0; - return EOI; - } - - op = getop(s); - if (op && !(op->op_type == UNOP && isoperand(tp)) && - !(op->op_num == LPAREN && !tp[1])) { - t_wp_op = op; - return op->op_num; - } - - t_wp_op = (struct t_op *)0; - return OPERAND; -} - -static int isoperand(char **tp) -{ - struct t_op const *op; - char *s; - - if (!(s = tp[1])) - return 1; - if (!tp[2]) - return 0; - - op = getop(s); - return op && op->op_type == BINOP; -} - -static int -newerf (const char *f1, const char *f2) -{ - struct stat64 b1, b2; - -#ifdef HAVE_ST_MTIM - return (stat64(f1, &b1) == 0 && - stat64(f2, &b2) == 0 && - ( b1.st_mtim.tv_sec > b2.st_mtim.tv_sec || - (b1.st_mtim.tv_sec == b2.st_mtim.tv_sec && (b1.st_mtim.tv_nsec > b2.st_mtim.tv_nsec ))) - ); -#else - return (stat64(f1, &b1) == 0 && - stat64(f2, &b2) == 0 && - b1.st_mtime > b2.st_mtime); -#endif -} - -static int -olderf (const char *f1, const char *f2) -{ - struct stat64 b1, b2; - -#ifdef HAVE_ST_MTIM - return (stat64(f1, &b1) == 0 && - stat64(f2, &b2) == 0 && - (b1.st_mtim.tv_sec < b2.st_mtim.tv_sec || - (b1.st_mtim.tv_sec == b2.st_mtim.tv_sec && (b1.st_mtim.tv_nsec < b2.st_mtim.tv_nsec ))) - ); -#else - return (stat64(f1, &b1) == 0 && - stat64(f2, &b2) == 0 && - b1.st_mtime < b2.st_mtime); -#endif -} - -static int -equalf (const char *f1, const char *f2) -{ - struct stat64 b1, b2; - - return (stat64(f1, &b1) == 0 && - stat64(f2, &b2) == 0 && - b1.st_dev == b2.st_dev && - b1.st_ino == b2.st_ino); -} - -#ifdef HAVE_FACCESSAT -static int has_exec_bit_set(const char *path) -{ - struct stat64 st; - - if (stat64(path, &st)) - return 0; - return st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH); -} - -static int test_file_access(const char *path, int mode) -{ - if (faccessat_confused_about_superuser() && - mode == X_OK && geteuid() == 0 && !has_exec_bit_set(path)) - return 0; - return !faccessat(AT_FDCWD, path, mode, AT_EACCESS); -} -#else /* HAVE_FACCESSAT */ -/* - * The manual, and IEEE POSIX 1003.2, suggests this should check the mode bits, - * not use access(): - * - * True shall indicate only that the write flag is on. The file is not - * writable on a read-only file system even if this test indicates true. - * - * Unfortunately IEEE POSIX 1003.1-2001, as quoted in SuSv3, says only: - * - * True shall indicate that permission to read from file will be granted, - * as defined in "File Read, Write, and Creation". - * - * and that section says: - * - * When a file is to be read or written, the file shall be opened with an - * access mode corresponding to the operation to be performed. If file - * access permissions deny access, the requested operation shall fail. - * - * and of course access permissions are described as one might expect: - * - * * If a process has the appropriate privilege: - * - * * If read, write, or directory search permission is requested, - * access shall be granted. - * - * * If execute permission is requested, access shall be granted if - * execute permission is granted to at least one user by the file - * permission bits or by an alternate access control mechanism; - * otherwise, access shall be denied. - * - * * Otherwise: - * - * * The file permission bits of a file contain read, write, and - * execute/search permissions for the file owner class, file group - * class, and file other class. - * - * * Access shall be granted if an alternate access control mechanism - * is not enabled and the requested access permission bit is set for - * the class (file owner class, file group class, or file other class) - * to which the process belongs, or if an alternate access control - * mechanism is enabled and it allows the requested access; otherwise, - * access shall be denied. - * - * and when I first read this I thought: surely we can't go about using - * open(O_WRONLY) to try this test! However the POSIX 1003.1-2001 Rationale - * section for test does in fact say: - * - * On historical BSD systems, test -w directory always returned false - * because test tried to open the directory for writing, which always - * fails. - * - * and indeed this is in fact true for Seventh Edition UNIX, UNIX 32V, and UNIX - * System III, and thus presumably also for BSD up to and including 4.3. - * - * Secondly I remembered why using open() and/or access() are bogus. They - * don't work right for detecting read and write permissions bits when called - * by root. - * - * Interestingly the 'test' in 4.4BSD was closer to correct (as per - * 1003.2-1992) and it was implemented efficiently with stat() instead of - * open(). - * - * This was apparently broken in NetBSD around about 1994/06/30 when the old - * 4.4BSD implementation was replaced with a (arguably much better coded) - * implementation derived from pdksh. - * - * Note that modern pdksh is yet different again, but still not correct, at - * least not w.r.t. 1003.2-1992. - * - * As I think more about it and read more of the related IEEE docs I don't like - * that wording about 'test -r' and 'test -w' in 1003.1-2001 at all. I very - * much prefer the original wording in 1003.2-1992. It is much more useful, - * and so that's what I've implemented. - * - * (Note that a strictly conforming implementation of 1003.1-2001 is in fact - * totally useless for the case in question since its 'test -w' and 'test -r' - * can never fail for root for any existing files, i.e. files for which 'test - * -e' succeeds.) - * - * The rationale for 1003.1-2001 suggests that the wording was "clarified" in - * 1003.1-2001 to align with the 1003.2b draft. 1003.2b Draft 12 (July 1999), - * which is the latest copy I have, does carry the same suggested wording as is - * in 1003.1-2001, with its rationale saying: - * - * This change is a clarification and is the result of interpretation - * request PASC 1003.2-92 #23 submitted for IEEE Std 1003.2-1992. - * - * That interpretation can be found here: - * - * http://www.pasc.org/interps/unofficial/db/p1003.2/pasc-1003.2-23.html - * - * Not terribly helpful, unfortunately. I wonder who that fence sitter was. - * - * Worse, IMVNSHO, I think the authors of 1003.2b-D12 have mis-interpreted the - * PASC interpretation and appear to be gone against at least one widely used - * implementation (namely 4.4BSD). The problem is that for file access by root - * this means that if test '-r' and '-w' are to behave as if open() were called - * then there's no way for a shell script running as root to check if a file - * has certain access bits set other than by the grotty means of interpreting - * the output of 'ls -l'. This was widely considered to be a bug in V7's - * "test" and is, I believe, one of the reasons why direct use of access() was - * avoided in some more recent implementations! - * - * I have always interpreted '-r' to match '-w' and '-x' as per the original - * wording in 1003.2-1992, not the other way around. I think 1003.2b goes much - * too far the wrong way without any valid rationale and that it's best if we - * stick with 1003.2-1992 and test the flags, and not mimic the behaviour of - * open() since we already know very well how it will work -- existance of the - * file is all that matters to open() for root. - * - * Unfortunately the SVID is no help at all (which is, I guess, partly why - * we're in this mess in the first place :-). - * - * The SysV implementation (at least in the 'test' builtin in /bin/sh) does use - * access(name, 2) even though it also goes to much greater lengths for '-x' - * matching the 1003.2-1992 definition (which is no doubt where that definition - * came from). - * - * The ksh93 implementation uses access() for '-r' and '-w' if - * (euid==uid&&egid==gid), but uses st_mode for '-x' iff running as root. - * i.e. it does strictly conform to 1003.1-2001 (and presumably 1003.2b). - */ -static int test_access(const struct stat64 *sp, int stmode) -{ - gid_t *groups; - register int n; - uid_t euid; - int maxgroups; - - /* - * I suppose we could use access() if not running as root and if we are - * running with ((euid == uid) && (egid == gid)), but we've already - * done the stat() so we might as well just test the permissions - * directly instead of asking the kernel to do it.... - */ - euid = geteuid(); - if (euid == 0) { - if (stmode != X_OK) - return 1; - - /* any bit is good enough */ - stmode = (stmode << 6) | (stmode << 3) | stmode; - } else if (sp->st_uid == euid) - stmode <<= 6; - else if (sp->st_gid == getegid()) - stmode <<= 3; - else { - /* XXX stolen almost verbatim from ksh93.... */ - /* on some systems you can be in several groups */ - maxgroups = getgroups(0, NULL); - groups = stalloc(maxgroups * sizeof(*groups)); - n = getgroups(maxgroups, groups); - while (--n >= 0) { - if (groups[n] == sp->st_gid) { - stmode <<= 3; - break; - } - } - } - - return sp->st_mode & stmode; -} -#endif /* HAVE_FACCESSAT */ diff --git a/bin/dash/src/bltin/times.c b/bin/dash/src/bltin/times.c deleted file mode 100644 index 1166a68e..00000000 --- a/bin/dash/src/bltin/times.c +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Copyright (c) 1999 Herbert Xu <herbert@gondor.apana.org.au> - * This file contains code for the times builtin. - */ - -#include <sys/times.h> -#include <unistd.h> -#ifdef USE_GLIBC_STDIO -#include <stdio.h> -#else -#include "bltin.h" -#endif -#include "system.h" - -int timescmd() { - struct tms buf; - long int clk_tck = sysconf(_SC_CLK_TCK); - int mutime, mstime, mcutime, mcstime; - double utime, stime, cutime, cstime; - - times(&buf); - - utime = (double)buf.tms_utime / clk_tck; - mutime = utime / 60; - utime -= mutime * 60.0; - - stime = (double)buf.tms_stime / clk_tck; - mstime = stime / 60; - stime -= mstime * 60.0; - - cutime = (double)buf.tms_cutime / clk_tck; - mcutime = cutime / 60; - cutime -= mcutime * 60.0; - - cstime = (double)buf.tms_cstime / clk_tck; - mcstime = cstime / 60; - cstime -= mcstime * 60.0; - - printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n", mutime, utime, mstime, stime, - mcutime, cutime, mcstime, cstime); - return 0; -} diff --git a/bin/dash/src/builtins.def.in b/bin/dash/src/builtins.def.in deleted file mode 100644 index 95e420cc..00000000 --- a/bin/dash/src/builtins.def.in +++ /dev/null @@ -1,94 +0,0 @@ -/* - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)builtins.def 8.4 (Berkeley) 5/4/95 - */ - -/* - * This file lists all the builtin commands. The first column is the name - * of a C routine. - * The -a flag specifies that this is a posix 'assignment builtin' command. - * The -s flag specifies that this is a posix 'special builtin' command. - * The -u flag specifies that this is a posix 'standard utility'. - * The -n flag specifies that this command has a special entry point. - * The rest of the line specifies the command name or names used to run - * the command. - */ - -#ifndef JOBS -#define JOBS 1 -#endif - -#if JOBS -bgcmd -u bg -fgcmd -u fg -#endif - -#ifndef SMALL -histcmd -u fc -#endif - -breakcmd -s break -s continue -cdcmd -u cd chdir -commandcmd -u command -dotcmd -s . -echocmd echo -evalcmd -ns eval -execcmd -s exec -exitcmd -s exit -exportcmd -as export -as readonly -falsecmd -u false -getoptscmd -u getopts -hashcmd -u hash -jobscmd -u jobs -localcmd -as local -printfcmd printf -pwdcmd -u pwd -readcmd -u read -returncmd -s return -setcmd -s set -shiftcmd -s shift -timescmd -s times -trapcmd -s trap -truecmd -s : -u true -typecmd -u type -umaskcmd -u umask -unaliascmd -u unalias -unsetcmd -s unset -waitcmd -u wait -aliascmd -au alias -#ifdef HAVE_GETRLIMIT -ulimitcmd -u ulimit -#endif -testcmd test [ -killcmd -u kill diff --git a/bin/dash/src/cd.c b/bin/dash/src/cd.c deleted file mode 100644 index 1ef1dc56..00000000 --- a/bin/dash/src/cd.c +++ /dev/null @@ -1,332 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <limits.h> -#ifdef __CYGWIN__ -#include <sys/cygwin.h> -#endif - -/* - * The cd and pwd commands. - */ - -#include "shell.h" -#include "var.h" -#include "nodes.h" /* for jobs.h */ -#include "jobs.h" -#include "options.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "exec.h" -#include "redir.h" -#include "main.h" -#include "mystring.h" -#include "show.h" -#include "cd.h" - -#define CD_PHYSICAL 1 -#define CD_PRINT 2 - -STATIC int docd(const char *, int); -STATIC const char *updatepwd(const char *); -STATIC char *getpwd(void); -STATIC int cdopt(void); - -STATIC char *curdir = nullstr; /* current working directory */ -STATIC char *physdir = nullstr; /* physical working directory */ - -STATIC int -cdopt() -{ - int flags = 0; - int i, j; - - j = 'L'; - while ((i = nextopt("LP"))) { - if (i != j) { - flags ^= CD_PHYSICAL; - j = i; - } - } - - return flags; -} - -int -cdcmd(int argc, char **argv) -{ - const char *dest; - const char *path; - const char *p; - char c; - struct stat64 statb; - int flags; - int len; - - flags = cdopt(); - dest = *argptr; - if (!dest) - dest = bltinlookup(homestr); - else if (dest[0] == '-' && dest[1] == '\0') { - dest = bltinlookup("OLDPWD"); - flags |= CD_PRINT; - } - if (!dest) - dest = nullstr; - if (*dest == '/') - goto step6; - if (*dest == '.') { - c = dest[1]; -dotdot: - switch (c) { - case '\0': - case '/': - goto step6; - case '.': - c = dest[2]; - if (c != '.') - goto dotdot; - } - } - if (!*dest) - dest = "."; - path = bltinlookup("CDPATH"); - while (p = path, (len = padvance_magic(&path, dest, 0)) >= 0) { - c = *p; - p = stalloc(len); - - if (stat64(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) { - if (c && c != ':') - flags |= CD_PRINT; -docd: - if (!docd(p, flags)) - goto out; - goto err; - } - } - -step6: - p = dest; - goto docd; - -err: - sh_error("can't cd to %s", dest); - /* NOTREACHED */ -out: - if (flags & CD_PRINT) - out1fmt(snlfmt, curdir); - return 0; -} - - -/* - * Actually do the chdir. We also call hashcd to let the routines in exec.c - * know that the current directory has changed. - */ - -STATIC int -docd(const char *dest, int flags) -{ - const char *dir = 0; - int err; - - TRACE(("docd(\"%s\", %d) called\n", dest, flags)); - - INTOFF; - if (!(flags & CD_PHYSICAL)) { - dir = updatepwd(dest); - if (dir) - dest = dir; - } - err = chdir(dest); - if (err) - goto out; - setpwd(dir, 1); - hashcd(); -out: - INTON; - return err; -} - - -/* - * Update curdir (the name of the current directory) in response to a - * cd command. - */ - -STATIC const char * -updatepwd(const char *dir) -{ - char *new; - char *p; - char *cdcomppath; - const char *lim; - -#ifdef __CYGWIN__ - /* On cygwin, thanks to drive letters, some absolute paths do - not begin with slash; but cygwin includes a function that - forces normalization to the posix form */ - char pathbuf[PATH_MAX]; - if (cygwin_conv_path(CCP_WIN_A_TO_POSIX | CCP_RELATIVE, dir, pathbuf, - sizeof(pathbuf)) < 0) - sh_error("can't normalize %s", dir); - dir = pathbuf; -#endif - - cdcomppath = sstrdup(dir); - STARTSTACKSTR(new); - if (*dir != '/') { - if (curdir == nullstr) - return 0; - new = stputs(curdir, new); - } - new = makestrspace(strlen(dir) + 2, new); - lim = stackblock() + 1; - if (*dir != '/') { - if (new[-1] != '/') - USTPUTC('/', new); - if (new > lim && *lim == '/') - lim++; - } else { - USTPUTC('/', new); - cdcomppath++; - if (dir[1] == '/' && dir[2] != '/') { - USTPUTC('/', new); - cdcomppath++; - lim++; - } - } - p = strtok(cdcomppath, "/"); - while (p) { - switch(*p) { - case '.': - if (p[1] == '.' && p[2] == '\0') { - while (new > lim) { - STUNPUTC(new); - if (new[-1] == '/') - break; - } - break; - } else if (p[1] == '\0') - break; - /* fall through */ - default: - new = stputs(p, new); - USTPUTC('/', new); - } - p = strtok(0, "/"); - } - if (new > lim) - STUNPUTC(new); - *new = 0; - return stackblock(); -} - - -/* - * Find out what the current directory is. If we already know the current - * directory, this routine returns immediately. - */ -inline -STATIC char * -getpwd() -{ -#ifdef __GLIBC__ - char *dir = getcwd(0, 0); - - if (dir) - return dir; -#else - char buf[PATH_MAX]; - - if (getcwd(buf, sizeof(buf))) - return savestr(buf); -#endif - - sh_warnx("getcwd() failed: %s", strerror(errno)); - return nullstr; -} - -int -pwdcmd(int argc, char **argv) -{ - int flags; - const char *dir = curdir; - - flags = cdopt(); - if (flags) { - if (physdir == nullstr) - setpwd(dir, 0); - dir = physdir; - } - out1fmt(snlfmt, dir); - return 0; -} - -void -setpwd(const char *val, int setold) -{ - char *oldcur, *dir; - - oldcur = dir = curdir; - - if (setold) { - setvar("OLDPWD", oldcur, VEXPORT); - } - INTOFF; - if (physdir != nullstr) { - if (physdir != oldcur) - free(physdir); - physdir = nullstr; - } - if (oldcur == val || !val) { - char *s = getpwd(); - physdir = s; - if (!val) - dir = s; - } else - dir = savestr(val); - if (oldcur != dir && oldcur != nullstr) { - free(oldcur); - } - curdir = dir; - INTON; - setvar("PWD", dir, VEXPORT); -} diff --git a/bin/dash/src/cd.h b/bin/dash/src/cd.h deleted file mode 100644 index 87631619..00000000 --- a/bin/dash/src/cd.h +++ /dev/null @@ -1,35 +0,0 @@ -/*- - * Copyright (c) 1995 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -int cdcmd(int, char **); -int pwdcmd(int, char **); -void setpwd(const char *, int); diff --git a/bin/dash/src/dash.1 b/bin/dash/src/dash.1 deleted file mode 100644 index 9bc51cd6..00000000 --- a/bin/dash/src/dash.1 +++ /dev/null @@ -1,2361 +0,0 @@ -.\" Copyright (c) 1991, 1993 -.\" The Regents of the University of California. All rights reserved. -.\" Copyright (c) 1997-2005 -.\" Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" Kenneth Almquist. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)sh.1 8.6 (Berkeley) 5/4/95 -.\" -.Dd December 22, 2020 -.Os -.Dt DASH 1 -.Sh NAME -.Nm dash -.Nd command interpreter (shell) -.Sh SYNOPSIS -.Nm -.Bk -words -.Op Fl aCefnuvxIimqVEb -.Op Cm +aCefnuvxIimqVEb -.Ek -.Bk -words -.Op Fl o Ar option_name -.Op Cm +o Ar option_name -.Ek -.Bk -words -.Op Ar command_file Oo Ar argument ... Oc -.Ek -.Nm -.Fl c -.Bk -words -.Op Fl aCefnuvxIimqVEb -.Op Cm +aCefnuvxIimqVEb -.Ek -.Bk -words -.Op Fl o Ar option_name -.Op Cm +o Ar option_name -.Ek -.Bk -words -.Ar command_string -.Op Ar command_name Oo Ar argument ... Oc -.Ek -.Nm -.Fl s -.Bk -words -.Op Fl aCefnuvxIimqVEb -.Op Cm +aCefnuvxIimqVEb -.Ek -.Bk -words -.Op Fl o Ar option_name -.Op Cm +o Ar option_name -.Ek -.Bk -words -.Op Ar argument ... -.Ek -.Sh DESCRIPTION -.Nm -is the standard command interpreter for the system. -The current version of -.Nm -is in the process of being changed to conform with the -.Tn POSIX -1003.2 and 1003.2a specifications for the shell. -This version has many -features which make it appear similar in some respects to the Korn shell, -but it is not a Korn shell clone (see -.Xr ksh 1 ) . -Only features designated by -.Tn POSIX , -plus a few Berkeley extensions, are being incorporated into this shell. -This man page is not intended -to be a tutorial or a complete specification of the shell. -.Ss Overview -The shell is a command that reads lines from either a file or the -terminal, interprets them, and generally executes other commands. -It is the program that is running when a user logs into the system -(although a user can select a different shell with the -.Xr chsh 1 -command). -The shell implements a language that has flow control -constructs, a macro facility that provides a variety of features in -addition to data storage, along with built in history and line editing -capabilities. -It incorporates many features to aid interactive use and -has the advantage that the interpretative language is common to both -interactive and non-interactive use (shell scripts). -That is, commands -can be typed directly to the running shell or can be put into a file and -the file can be executed directly by the shell. -.Ss Invocation -If no args are present and if the standard input of the shell -is connected to a terminal (or if the -.Fl i -flag is set), -and the -.Fl c -option is not present, the shell is considered an interactive shell. -An interactive shell generally prompts before each command and handles -programming and command errors differently (as described below). -When first starting, -the shell inspects argument 0, and if it begins with a dash -.Sq - , -the shell is also considered -a login shell. -This is normally done automatically by the system -when the user first logs in. -A login shell first reads commands -from the files -.Pa /etc/profile -and -.Pa .profile -if they exist. -If the environment variable -.Ev ENV -is set on entry to an interactive shell, or is set in the -.Pa .profile -of a login shell, the shell next reads -commands from the file named in -.Ev ENV . -Therefore, a user should place commands that are to be executed only at -login time in the -.Pa .profile -file, and commands that are executed for every interactive shell inside the -.Ev ENV -file. -To set the -.Ev ENV -variable to some file, place the following line in your -.Pa .profile -of your home directory -.Pp -.Dl ENV=$HOME/.shinit; export ENV -.Pp -substituting for -.Dq .shinit -any filename you wish. -.Pp -If command line arguments besides the options have been specified, then -the shell treats the first argument as the name of a file from which to -read commands (a shell script), and the remaining arguments are set as the -positional parameters of the shell ($1, $2, etc). -Otherwise, the shell -reads commands from its standard input. -.Ss Argument List Processing -All of the single letter options that have a corresponding name can be -used as an argument to the -.Fl o -option. -The set -.Fl o -name is provided next to the single letter option in -the description below. -Specifying a dash -.Dq - -turns the option on, while using a plus -.Dq + -disables the option. -The following options can be set from the command line or -with the -.Ic set -builtin (described later). -.Bl -tag -width aaaallexportfoo -offset indent -.It Fl a Em allexport -Export all variables assigned to. -.It Fl c -Read commands from the -.Ar command_string -operand instead of from the standard input. -Special parameter 0 will be set from the -.Ar command_name -operand and the positional parameters ($1, $2, etc.) -set from the remaining argument operands. -.It Fl C Em noclobber -Don't overwrite existing files with -.Dq \*[Gt] . -.It Fl e Em errexit -If not interactive, exit immediately if any untested command fails. -The exit status of a command is considered to be -explicitly tested if the command is used to control an -.Ic if , -.Ic elif , -.Ic while , -or -.Ic until ; -or if the command is the left hand operand of an -.Dq && -or -.Dq || -operator. -.It Fl f Em noglob -Disable pathname expansion. -.It Fl n Em noexec -If not interactive, read commands but do not execute them. -This is useful for checking the syntax of shell scripts. -.It Fl u Em nounset -Write a message to standard error when attempting to expand a variable -that is not set, and if the shell is not interactive, exit immediately. -.It Fl v Em verbose -The shell writes its input to standard error as it is read. -Useful for debugging. -.It Fl x Em xtrace -Write each command to standard error (preceded by a -.Sq +\ ) -before it is executed. -Useful for debugging. -.It Fl I Em ignoreeof -Ignore EOF's from input when interactive. -.It Fl i Em interactive -Force the shell to behave interactively. -.It Fl l -Make dash act as if it had been invoked as a login shell. -.It Fl m Em monitor -Turn on job control (set automatically when interactive). -.It Fl s Em stdin -Read commands from standard input (set automatically if no file arguments -are present). -This option has no effect when set after the shell has -already started running (i.e. with -.Ic set ) . -.It Fl V Em vi -Enable the built-in -.Xr vi 1 -command line editor (disables -.Fl E -if it has been set). -.It Fl E Em emacs -Enable the built-in -.Xr emacs 1 -command line editor (disables -.Fl V -if it has been set). -.It Fl b Em notify -Enable asynchronous notification of background job completion. -(UNIMPLEMENTED for 4.4alpha) -.El -.Ss Lexical Structure -The shell reads input in terms of lines from a file and breaks it up into -words at whitespace (blanks and tabs), and at certain sequences of -characters that are special to the shell called -.Dq operators . -There are two types of operators: control operators and redirection -operators (their meaning is discussed later). -Following is a list of operators: -.Bl -ohang -offset indent -.It "Control operators:" -.Dl & && \&( \&) \&; ;; | || \*[Lt]newline\*[Gt] -.It "Redirection operators:" -.Dl \*[Lt] \*[Gt] \*[Gt]| \*[Lt]\*[Lt] \*[Gt]\*[Gt] \*[Lt]& \*[Gt]& \*[Lt]\*[Lt]- \*[Lt]\*[Gt] -.El -.Ss Quoting -Quoting is used to remove the special meaning of certain characters or -words to the shell, such as operators, whitespace, or keywords. -There are three types of quoting: matched single quotes, -matched double quotes, and backslash. -.Ss Backslash -A backslash preserves the literal meaning of the following -character, with the exception of -.Aq newline . -A backslash preceding a -.Aq newline -is treated as a line continuation. -.Ss Single Quotes -Enclosing characters in single quotes preserves the literal meaning of all -the characters (except single quotes, making it impossible to put -single-quotes in a single-quoted string). -.Ss Double Quotes -Enclosing characters within double quotes preserves the literal -meaning of all characters except dollarsign -.Pq $ , -backquote -.Pq ` , -and backslash -.Pq \e . -The backslash inside double quotes is historically weird, and serves to -quote only the following characters: -.Dl $ ` \*q \e \*[Lt]newline\*[Gt] . -Otherwise it remains literal. -.Ss Reserved Words -Reserved words are words that have special meaning to the -shell and are recognized at the beginning of a line and -after a control operator. -The following are reserved words: -.Bl -column while while while while while -offset indent -.It ! Ta elif Ta fi Ta while Ta case -.It else Ta for Ta then Ta { Ta } -.It do Ta done Ta until Ta if Ta esac -.El -.Pp -Their meaning is discussed later. -.Ss Aliases -An alias is a name and corresponding value set using the -.Xr alias 1 -builtin command. -Whenever a reserved word may occur (see above), -and after checking for reserved words, the shell -checks the word to see if it matches an alias. -If it does, it replaces it in the input stream with its value. -For example, if there is an alias called -.Dq lf -with the value -.Dq "ls -F" , -then the input: -.Pp -.Dl lf foobar Aq return -.Pp -would become -.Pp -.Dl ls -F foobar Aq return -.Pp -Aliases provide a convenient way for naive users to create shorthands for -commands without having to learn how to create functions with arguments. -They can also be used to create lexically obscure code. -This use is discouraged. -.Ss Commands -The shell interprets the words it reads according to a language, the -specification of which is outside the scope of this man page (refer to the -BNF in the -.Tn POSIX -1003.2 document). -Essentially though, a line is read and if the first -word of the line (or after a control operator) is not a reserved word, -then the shell has recognized a simple command. -Otherwise, a complex -command or some other special construct may have been recognized. -.Ss Simple Commands -If a simple command has been recognized, the shell performs -the following actions: -.Bl -enum -offset indent -.It -Leading words of the form -.Dq name=value -are stripped off and assigned to the environment of the simple command. -Redirection operators and their arguments (as described below) are -stripped off and saved for processing. -.It -The remaining words are expanded as described in -the section called -.Dq Expansions , -and the first remaining word is considered the command name and the -command is located. -The remaining words are considered the arguments of the command. -If no command name resulted, then the -.Dq name=value -variable assignments recognized in item 1 affect the current shell. -.It -Redirections are performed as described in the next section. -.El -.Ss Redirections -Redirections are used to change where a command reads its input or sends -its output. -In general, redirections open, close, or duplicate an -existing reference to a file. -The overall format used for redirection is: -.Pp -.Dl [n] Va redir-op Ar file -.Pp -where -.Va redir-op -is one of the redirection operators mentioned previously. -Following is a list of the possible redirections. -The -.Bq n -is an optional number between 0 and 9, as in -.Sq 3 -(not -.Sq Bq 3 ) , -that refers to a file descriptor. -.Bl -tag -width aaabsfiles -offset indent -.It [n] Ns \*[Gt] file -Redirect standard output (or n) to file. -.It [n] Ns \*[Gt]| file -Same, but override the -.Fl C -option. -.It [n] Ns \*[Gt]\*[Gt] file -Append standard output (or n) to file. -.It [n] Ns \*[Lt] file -Redirect standard input (or n) from file. -.It [n1] Ns \*[Lt]& Ns n2 -Copy file descriptor n2 as stdout (or fd n1). -fd n2. -.It [n] Ns \*[Lt]&- -Close standard input (or n). -.It [n1] Ns \*[Gt]& Ns n2 -Copy file descriptor n2 as stdin (or fd n1). -fd n2. -.It [n] Ns \*[Gt]&- -Close standard output (or n). -.It [n] Ns \*[Lt]\*[Gt] file -Open file for reading and writing on standard input (or n). -.El -.Pp -The following redirection is often called a -.Dq here-document . -.Bl -item -offset indent -.It -.Li [n]\*[Lt]\*[Lt] delimiter -.Dl here-doc-text ... -.Li delimiter -.El -.Pp -All the text on successive lines up to the delimiter is saved away and -made available to the command on standard input, or file descriptor n if -it is specified. -If the delimiter as specified on the initial line is -quoted, then the here-doc-text is treated literally, otherwise the text is -subjected to parameter expansion, command substitution, and arithmetic -expansion (as described in the section on -.Dq Expansions ) . -If the operator is -.Dq \*[Lt]\*[Lt]- -instead of -.Dq \*[Lt]\*[Lt] , -then leading tabs in the here-doc-text are stripped. -.Ss Search and Execution -There are three types of commands: shell functions, builtin commands, and -normal programs -- and the command is searched for (by name) in that order. -They each are executed in a different way. -.Pp -When a shell function is executed, all of the shell positional parameters -(except $0, which remains unchanged) are set to the arguments of the shell -function. -The variables which are explicitly placed in the environment of -the command (by placing assignments to them before the function name) are -made local to the function and are set to the values given. -Then the command given in the function definition is executed. -The positional parameters are restored to their original values -when the command completes. -This all occurs within the current shell. -.Pp -Shell builtins are executed internally to the shell, without spawning a -new process. -.Pp -Otherwise, if the command name doesn't match a function or builtin, the -command is searched for as a normal program in the file system (as -described in the next section). -When a normal program is executed, the shell runs the program, -passing the arguments and the environment to the program. -If the program is not a normal executable file (i.e., if it does -not begin with the "magic number" whose -.Tn ASCII -representation is "#!", so -.Xr execve 2 -returns -.Er ENOEXEC -then) the shell will interpret the program in a subshell. -The child shell will reinitialize itself in this case, -so that the effect will be as if a -new shell had been invoked to handle the ad-hoc shell script, except that -the location of hashed commands located in the parent shell will be -remembered by the child. -.Pp -Note that previous versions of this document and the source code itself -misleadingly and sporadically refer to a shell script without a magic -number as a "shell procedure". -.Ss Path Search -When locating a command, the shell first looks to see if it has a shell -function by that name. -Then it looks for a builtin command by that name. -If a builtin command is not found, one of two things happen: -.Bl -enum -.It -Command names containing a slash are simply executed without performing -any searches. -.It -The shell searches each entry in -.Ev PATH -in turn for the command. -The value of the -.Ev PATH -variable should be a series of entries separated by colons. -Each entry consists of a directory name. -The current directory may be indicated -implicitly by an empty directory name, or explicitly by a single period. -.El -.Ss Command Exit Status -Each command has an exit status that can influence the behaviour -of other shell commands. -The paradigm is that a command exits -with zero for normal or success, and non-zero for failure, -error, or a false indication. -The man page for each command -should indicate the various exit codes and what they mean. -Additionally, the builtin commands return exit codes, as does -an executed shell function. -.Pp -If a command consists entirely of variable assignments then the -exit status of the command is that of the last command substitution -if any, otherwise 0. -.Ss Complex Commands -Complex commands are combinations of simple commands with control -operators or reserved words, together creating a larger complex command. -More generally, a command is one of the following: -.Bl -bullet -.It -simple command -.It -pipeline -.It -list or compound-list -.It -compound command -.It -function definition -.El -.Pp -Unless otherwise stated, the exit status of a command is that of the last -simple command executed by the command. -.Ss Pipelines -A pipeline is a sequence of one or more commands separated -by the control operator |. -The standard output of all but -the last command is connected to the standard input -of the next command. -The standard output of the last -command is inherited from the shell, as usual. -.Pp -The format for a pipeline is: -.Pp -.Dl [!] command1 [ | command2 ...] -.Pp -The standard output of command1 is connected to the standard input of -command2. -The standard input, standard output, or both of a command is -considered to be assigned by the pipeline before any redirection specified -by redirection operators that are part of the command. -.Pp -If the pipeline is not in the background (discussed later), the shell -waits for all commands to complete. -.Pp -If the reserved word ! does not precede the pipeline, the exit status is -the exit status of the last command specified in the pipeline. -Otherwise, the exit status is the logical NOT of the exit status of the -last command. -That is, if the last command returns zero, the exit status -is 1; if the last command returns greater than zero, the exit status is -zero. -.Pp -Because pipeline assignment of standard input or standard output or both -takes place before redirection, it can be modified by redirection. -For example: -.Pp -.Dl $ command1 2\*[Gt]&1 | command2 -.Pp -sends both the standard output and standard error of command1 -to the standard input of command2. -.Pp -A ; or -.Aq newline -terminator causes the preceding AND-OR-list (described -next) to be executed sequentially; a & causes asynchronous execution of -the preceding AND-OR-list. -.Pp -Note that unlike some other shells, each process in the pipeline is a -child of the invoking shell (unless it is a shell builtin, in which case -it executes in the current shell -- but any effect it has on the -environment is wiped). -.Ss Background Commands -- & -If a command is terminated by the control operator ampersand (&), the -shell executes the command asynchronously -- that is, the shell does not -wait for the command to finish before executing the next command. -.Pp -The format for running a command in background is: -.Pp -.Dl command1 & [command2 & ...] -.Pp -If the shell is not interactive, the standard input of an asynchronous -command is set to -.Pa /dev/null . -.Ss Lists -- Generally Speaking -A list is a sequence of zero or more commands separated by newlines, -semicolons, or ampersands, and optionally terminated by one of these three -characters. -The commands in a list are executed in the order they are written. -If command is followed by an ampersand, the shell starts the -command and immediately proceeds onto the next command; otherwise it waits -for the command to terminate before proceeding to the next one. -.Ss Short-Circuit List Operators -.Dq && -and -.Dq || -are AND-OR list operators. -.Dq && -executes the first command, and then executes the second command if and only -if the exit status of the first command is zero. -.Dq || -is similar, but executes the second command if and only if the exit status -of the first command is nonzero. -.Dq && -and -.Dq || -both have the same priority. -.Ss Flow-Control Constructs -- if, while, for, case -The syntax of the if command is -.Bd -literal -offset indent -if list -then list -[ elif list -then list ] ... -[ else list ] -fi -.Ed -.Pp -The syntax of the while command is -.Bd -literal -offset indent -while list -do list -done -.Ed -.Pp -The two lists are executed repeatedly while the exit status of the -first list is zero. -The until command is similar, but has the word -until in place of while, which causes it to -repeat until the exit status of the first list is zero. -.Pp -The syntax of the for command is -.Bd -literal -offset indent -for variable [ in [ word ... ] ] -do list -done -.Ed -.Pp -The words following -.Pa in -are expanded, and then the list is executed repeatedly with the -variable set to each word in turn. -Omitting in word ... is equivalent to in "$@". -.Pp -The syntax of the break and continue command is -.Bd -literal -offset indent -break [ num ] -continue [ num ] -.Ed -.Pp -Break terminates the num innermost for or while loops. -Continue continues with the next iteration of the innermost loop. -These are implemented as builtin commands. -.Pp -The syntax of the case command is -.Bd -literal -offset indent -case word in -[(]pattern) list ;; -\&... -esac -.Ed -.Pp -The pattern can actually be one or more patterns (see -.Sx Shell Patterns -described later), separated by -.Dq \*(Ba -characters. -The -.Do -( -.Dc -character before the pattern is optional. -.Ss Grouping Commands Together -Commands may be grouped by writing either -.Pp -.Dl (list) -.Pp -or -.Pp -.Dl { list; } -.Pp -The first of these executes the commands in a subshell. -Builtin commands grouped into a (list) will not affect the current shell. -The second form does not fork another shell so is slightly more efficient. -Grouping commands together this way allows you to redirect -their output as though they were one program: -.Pp -.Bd -literal -offset indent -{ printf \*q hello \*q ; printf \*q world\\n" ; } \*[Gt] greeting -.Ed -.Pp -Note that -.Dq } -must follow a control operator (here, -.Dq \&; ) -so that it is recognized as a reserved word and not as another command argument. -.Ss Functions -The syntax of a function definition is -.Pp -.Dl name ( ) command -.Pp -A function definition is an executable statement; when executed it -installs a function named name and returns an exit status of zero. -The command is normally a list enclosed between -.Dq { -and -.Dq } . -.Pp -Variables may be declared to be local to a function by using a local -command. -This should appear as the first statement of a function, and the syntax is -.Pp -.Dl local [ variable | - ] ... -.Pp -Local is implemented as a builtin command. -.Pp -When a variable is made local, it inherits the initial value and exported -and readonly flags from the variable with the same name in the surrounding -scope, if there is one. -Otherwise, the variable is initially unset. -The shell uses dynamic scoping, so that if you make the variable x local to -function f, which then calls function g, references to the variable x made -inside g will refer to the variable x declared inside f, not to the global -variable named x. -.Pp -The only special parameter that can be made local is -.Dq - . -Making -.Dq - -local any shell options that are changed via the set command inside the -function to be restored to their original values when the function -returns. -.Pp -The syntax of the return command is -.Pp -.Dl return [ exitstatus ] -.Pp -It terminates the currently executing function. -Return is implemented as a builtin command. -.Ss Variables and Parameters -The shell maintains a set of parameters. -A parameter denoted by a name is called a variable. -When starting up, the shell turns all the environment -variables into shell variables. -New variables can be set using the form -.Pp -.Dl name=value -.Pp -Variables set by the user must have a name consisting solely of -alphabetics, numerics, and underscores - the first of which must not be -numeric. -A parameter can also be denoted by a number or a special -character as explained below. -.Ss Positional Parameters -A positional parameter is a parameter denoted by a number (n \*[Gt] 0). -The shell sets these initially to the values of its command line arguments -that follow the name of the shell script. -The -.Ic set -builtin can also be used to set or reset them. -.Ss Special Parameters -A special parameter is a parameter denoted by one of the following special -characters. -The value of the parameter is listed next to its character. -.Bl -tag -width thinhyphena -.It * -Expands to the positional parameters, starting from one. -When the -expansion occurs within a double-quoted string it expands to a single -field with the value of each parameter separated by the first character of -the -.Ev IFS -variable, or by a -.Aq space -if -.Ev IFS -is unset. -.It @ -Expands to the positional parameters, starting from one. -When the expansion occurs within double-quotes, each positional -parameter expands as a separate argument. -If there are no positional parameters, the -expansion of @ generates zero arguments, even when @ is -double-quoted. -What this basically means, for example, is -if $1 is -.Dq abc -and $2 is -.Dq def ghi , -then -.Qq $@ -expands to -the two arguments: -.Pp -.Sm off -.Dl \*q abc \*q \ \*q def\ ghi \*q -.Sm on -.It # -Expands to the number of positional parameters. -.It ? -Expands to the exit status of the most recent pipeline. -.It - (Hyphen.) -Expands to the current option flags (the single-letter -option names concatenated into a string) as specified on -invocation, by the set builtin command, or implicitly -by the shell. -.It $ -Expands to the process ID of the invoked shell. -A subshell retains the same value of $ as its parent. -.It ! -Expands to the process ID of the most recent background -command executed from the current shell. -For a pipeline, the process ID is that of the last command in the pipeline. -.It 0 (Zero.) -Expands to the name of the shell or shell script. -.El -.Ss Word Expansions -This clause describes the various expansions that are performed on words. -Not all expansions are performed on every word, as explained later. -.Pp -Tilde expansions, parameter expansions, command substitutions, arithmetic -expansions, and quote removals that occur within a single word expand to a -single field. -It is only field splitting or pathname expansion that can -create multiple fields from a single word. -The single exception to this -rule is the expansion of the special parameter @ within double-quotes, as -was described above. -.Pp -The order of word expansion is: -.Bl -enum -.It -Tilde Expansion, Parameter Expansion, Command Substitution, -Arithmetic Expansion (these all occur at the same time). -.It -Field Splitting is performed on fields -generated by step (1) unless the -.Ev IFS -variable is null. -.It -Pathname Expansion (unless set -.Fl f -is in effect). -.It -Quote Removal. -.El -.Pp -The $ character is used to introduce parameter expansion, command -substitution, or arithmetic evaluation. -.Ss Tilde Expansion (substituting a user's home directory) -A word beginning with an unquoted tilde character (~) is -subjected to tilde expansion. -All the characters up to -a slash (/) or the end of the word are treated as a username -and are replaced with the user's home directory. -If the username is missing (as in -.Pa ~/foobar ) , -the tilde is replaced with the value of the -.Va HOME -variable (the current user's home directory). -.Ss Parameter Expansion -The format for parameter expansion is as follows: -.Pp -.Dl ${expression} -.Pp -where expression consists of all characters until the matching -.Dq } . -Any -.Dq } -escaped by a backslash or within a quoted string, and characters in -embedded arithmetic expansions, command substitutions, and variable -expansions, are not examined in determining the matching -.Dq } . -.Pp -The simplest form for parameter expansion is: -.Pp -.Dl ${parameter} -.Pp -The value, if any, of parameter is substituted. -.Pp -The parameter name or symbol can be enclosed in braces, which are -optional except for positional parameters with more than one digit or -when parameter is followed by a character that could be interpreted as -part of the name. -If a parameter expansion occurs inside double-quotes: -.Bl -enum -.It -Pathname expansion is not performed on the results of the expansion. -.It -Field splitting is not performed on the results of the -expansion, with the exception of @. -.El -.Pp -In addition, a parameter expansion can be modified by using one of the -following formats. -.Bl -tag -width aaparameterwordaaaaa -.It ${parameter:-word} -Use Default Values. -If parameter is unset or null, the expansion of word -is substituted; otherwise, the value of parameter is substituted. -.It ${parameter:=word} -Assign Default Values. -If parameter is unset or null, the expansion of -word is assigned to parameter. -In all cases, the final value of parameter is substituted. -Only variables, not positional parameters or special -parameters, can be assigned in this way. -.It ${parameter:?[word]} -Indicate Error if Null or Unset. -If parameter is unset or null, the -expansion of word (or a message indicating it is unset if word is omitted) -is written to standard error and the shell exits with a nonzero exit status. -Otherwise, the value of parameter is substituted. -An interactive shell need not exit. -.It ${parameter:+word} -Use Alternative Value. -If parameter is unset or null, null is -substituted; otherwise, the expansion of word is substituted. -.El -.Pp -In the parameter expansions shown previously, use of the colon in the -format results in a test for a parameter that is unset or null; omission -of the colon results in a test for a parameter that is only unset. -.Bl -tag -width aaparameterwordaaaaa -.It ${#parameter} -String Length. -The length in characters of the value of parameter. -.El -.Pp -The following four varieties of parameter expansion provide for substring -processing. -In each case, pattern matching notation (see -.Sx Shell Patterns ) , -rather than regular expression notation, is used to evaluate the patterns. -If parameter is * or @, the result of the expansion is unspecified. -Enclosing the full parameter expansion string in double-quotes does not -cause the following four varieties of pattern characters to be quoted, -whereas quoting characters within the braces has this effect. -.Bl -tag -width aaparameterwordaaaaa -.It ${parameter%word} -Remove Smallest Suffix Pattern. -The word is expanded to produce a pattern. -The parameter expansion then results in parameter, with the -smallest portion of the suffix matched by the pattern deleted. -.It ${parameter%%word} -Remove Largest Suffix Pattern. -The word is expanded to produce a pattern. -The parameter expansion then results in parameter, with the largest -portion of the suffix matched by the pattern deleted. -.It ${parameter#word} -Remove Smallest Prefix Pattern. -The word is expanded to produce a pattern. -The parameter expansion then results in parameter, with the -smallest portion of the prefix matched by the pattern deleted. -.It ${parameter##word} -Remove Largest Prefix Pattern. -The word is expanded to produce a pattern. -The parameter expansion then results in parameter, with the largest -portion of the prefix matched by the pattern deleted. -.El -.Ss Command Substitution -Command substitution allows the output of a command to be substituted in -place of the command name itself. -Command substitution occurs when the command is enclosed as follows: -.Pp -.Dl $(command) -.Pp -or -.Po -.Dq backquoted -version -.Pc : -.Pp -.Dl `command` -.Pp -The shell expands the command substitution by executing command in a -subshell environment and replacing the command substitution with the -standard output of the command, removing sequences of one or more -.Ao newline Ac Ns s -at the end of the substitution. -(Embedded -.Ao newline Ac Ns s -before -the end of the output are not removed; however, during field splitting, -they may be translated into -.Ao space Ac Ns s , -depending on the value of -.Ev IFS -and quoting that is in effect.) -.Ss Arithmetic Expansion -Arithmetic expansion provides a mechanism for evaluating an arithmetic -expression and substituting its value. -The format for arithmetic expansion is as follows: -.Pp -.Dl $((expression)) -.Pp -The expression is treated as if it were in double-quotes, except -that a double-quote inside the expression is not treated specially. -The shell expands all tokens in the expression for parameter expansion, -command substitution, and quote removal. -.Pp -Next, the shell treats this as an arithmetic expression and -substitutes the value of the expression. -.Ss White Space Splitting (Field Splitting) -After parameter expansion, command substitution, and -arithmetic expansion the shell scans the results of -expansions and substitutions that did not occur in double-quotes for -field splitting and multiple fields can result. -.Pp -The shell treats each character of the -.Ev IFS -as a delimiter and uses the delimiters to split the results of parameter -expansion and command substitution into fields. -.Ss Pathname Expansion (File Name Generation) -Unless the -.Fl f -flag is set, file name generation is performed after word splitting is -complete. -Each word is viewed as a series of patterns, separated by slashes. -The process of expansion replaces the word with the names of all -existing files whose names can be formed by replacing each pattern with a -string that matches the specified pattern. -There are two restrictions on -this: first, a pattern cannot match a string containing a slash, and -second, a pattern cannot match a string starting with a period unless the -first character of the pattern is a period. -The next section describes the -patterns used for both Pathname Expansion and the -.Ic case -command. -.Ss Shell Patterns -A pattern consists of normal characters, which match themselves, -and meta-characters. -The meta-characters are -.Dq \&! , -.Dq * , -.Dq \&? , -and -.Dq \&[ . -These characters lose their special meanings if they are quoted. -When command or variable substitution is performed -and the dollar sign or back quotes are not double quoted, -the value of the variable or the output of -the command is scanned for these characters and they are turned into -meta-characters. -.Pp -An asterisk -.Pq Dq * -matches any string of characters. -A question mark matches any single character. -A left bracket -.Pq Dq \&[ -introduces a character class. -The end of the character class is indicated by a -.Pq Dq \&] ; -if the -.Dq \&] -is missing then the -.Dq \&[ -matches a -.Dq \&[ -rather than introducing a character class. -A character class matches any of the characters between the square brackets. -A range of characters may be specified using a minus sign. -The character class may be complemented -by making an exclamation point the first character of the character class. -.Pp -To include a -.Dq \&] -in a character class, make it the first character listed (after the -.Dq \&! , -if any). -To include a minus sign, make it the first or last character listed. -.Ss Builtins -This section lists the builtin commands which are builtin because they -need to perform some operation that can't be performed by a separate -process. -In addition to these, there are several other commands that may -be builtin for efficiency (e.g. -.Xr printf 1 , -.Xr echo 1 , -.Xr test 1 , -etc). -.Bl -tag -width 5n -.It : -.It true -A null command that returns a 0 (true) exit value. -.It \&. file -The commands in the specified file are read and executed by the shell. -.It alias Op Ar name Ns Op Ar "=string ..." -If -.Ar name=string -is specified, the shell defines the alias -.Ar name -with value -.Ar string . -If just -.Ar name -is specified, the value of the alias -.Ar name -is printed. -With no arguments, the -.Ic alias -builtin prints the -names and values of all defined aliases (see -.Ic unalias ) . -.It bg [ Ar job ] ... -Continue the specified jobs (or the current job if no -jobs are given) in the background. -.It Xo command -.Op Fl p -.Op Fl v -.Op Fl V -.Ar command -.Op Ar arg ... -.Xc -Execute the specified command but ignore shell functions when searching -for it. -(This is useful when you -have a shell function with the same name as a builtin command.) -.Bl -tag -width 5n -.It Fl p -search for command using a -.Ev PATH -that guarantees to find all the standard utilities. -.It Fl V -Do not execute the command but -search for the command and print the resolution of the -command search. -This is the same as the type builtin. -.It Fl v -Do not execute the command but -search for the command and print the absolute pathname -of utilities, the name for builtins or the expansion of aliases. -.El -.It cd Ar - -.It Xo cd Op Fl LP -.Op Ar directory -.Xc -Switch to the specified directory (default -.Ev HOME ) . -If an entry for -.Ev CDPATH -appears in the environment of the -.Ic cd -command or the shell variable -.Ev CDPATH -is set and the directory name does not begin with a slash, then the -directories listed in -.Ev CDPATH -will be searched for the specified directory. -The format of -.Ev CDPATH -is the same as that of -.Ev PATH . -If a single dash is specified as the argument, it will be replaced by the -value of -.Ev OLDPWD . -The -.Ic cd -command will print out the name of the -directory that it actually switched to if this is different from the name -that the user gave. -These may be different either because the -.Ev CDPATH -mechanism was used or because the argument is a single dash. -The -.Fl P -option causes the physical directory structure to be used, that is, all -symbolic links are resolved to their respective values. The -.Fl L -option turns off the effect of any preceding -.Fl P -options. -.It Xo echo Op Fl n -.Ar args... -.Xc -Print the arguments on the standard output, separated by spaces. -Unless the -.Fl n -option is present, a newline is output following the arguments. -.Pp -If any of the following sequences of characters is encountered during -output, the sequence is not output. Instead, the specified action is -performed: -.Bl -tag -width indent -.It Li \eb -A backspace character is output. -.It Li \ec -Subsequent output is suppressed. This is normally used at the end of the -last argument to suppress the trailing newline that -.Ic echo -would otherwise output. -.It Li \ef -Output a form feed. -.It Li \en -Output a newline character. -.It Li \er -Output a carriage return. -.It Li \et -Output a (horizontal) tab character. -.It Li \ev -Output a vertical tab. -.It Li \e0 Ns Ar digits -Output the character whose value is given by zero to three octal digits. -If there are zero digits, a nul character is output. -.It Li \e\e -Output a backslash. -.El -.Pp -All other backslash sequences elicit undefined behaviour. -.It eval Ar string ... -Concatenate all the arguments with spaces. -Then re-parse and execute the command. -.It exec Op Ar command arg ... -Unless command is omitted, the shell process is replaced with the -specified program (which must be a real program, not a shell builtin or -function). -Any redirections on the -.Ic exec -command are marked as permanent, so that they are not undone when the -.Ic exec -command finishes. -.It exit Op Ar exitstatus -Terminate the shell process. -If -.Ar exitstatus -is given it is used as the exit status of the shell; otherwise the -exit status of the preceding command is used. -.It export Ar name ... -.It export Fl p -The specified names are exported so that they will appear in the -environment of subsequent commands. -The only way to un-export a variable is to unset it. -The shell allows the value of a variable to be set at the -same time it is exported by writing -.Pp -.Dl export name=value -.Pp -With no arguments the export command lists the names of all exported variables. -With the -.Fl p -option specified the output will be formatted suitably for non-interactive use. -.It Xo fc Op Fl e Ar editor -.Op Ar first Op Ar last -.Xc -.It Xo fc Fl l -.Op Fl nr -.Op Ar first Op Ar last -.Xc -.It Xo fc Fl s Op Ar old=new -.Op Ar first -.Xc -The -.Ic fc -builtin lists, or edits and re-executes, commands previously entered -to an interactive shell. -.Bl -tag -width 5n -.It Fl e No editor -Use the editor named by editor to edit the commands. -The editor string is a command name, subject to search via the -.Ev PATH -variable. -The value in the -.Ev FCEDIT -variable is used as a default when -.Fl e -is not specified. -If -.Ev FCEDIT -is null or unset, the value of the -.Ev EDITOR -variable is used. -If -.Ev EDITOR -is null or unset, -.Xr ed 1 -is used as the editor. -.It Fl l No (ell) -List the commands rather than invoking an editor on them. -The commands are written in the sequence indicated by -the first and last operands, as affected by -.Fl r , -with each command preceded by the command number. -.It Fl n -Suppress command numbers when listing with -l. -.It Fl r -Reverse the order of the commands listed (with -.Fl l ) -or edited (with neither -.Fl l -nor -.Fl s ) . -.It Fl s -Re-execute the command without invoking an editor. -.It first -.It last -Select the commands to list or edit. -The number of previous commands that -can be accessed are determined by the value of the -.Ev HISTSIZE -variable. -The value of first or last or both are one of the following: -.Bl -tag -width 5n -.It [+]number -A positive number representing a command number; command numbers can be -displayed with the -.Fl l -option. -.It Fl number -A negative decimal number representing the command that was executed -number of commands previously. -For example, \-1 is the immediately previous command. -.El -.It string -A string indicating the most recently entered command that begins with -that string. -If the old=new operand is not also specified with -.Fl s , -the string form of the first operand cannot contain an embedded equal sign. -.El -.Pp -The following environment variables affect the execution of fc: -.Bl -tag -width HISTSIZE -.It Ev FCEDIT -Name of the editor to use. -.It Ev HISTSIZE -The number of previous commands that are accessible. -.El -.It fg Op Ar job -Move the specified job or the current job to the foreground. -.It getopts Ar optstring var -The -.Tn POSIX -.Ic getopts -command, not to be confused with the -.Em Bell Labs --derived -.Xr getopt 1 . -.Pp -The first argument should be a series of letters, each of which may be -optionally followed by a colon to indicate that the option requires an -argument. -The variable specified is set to the parsed option. -.Pp -The -.Ic getopts -command deprecates the older -.Xr getopt 1 -utility due to its handling of arguments containing whitespace. -.Pp -The -.Ic getopts -builtin may be used to obtain options and their arguments -from a list of parameters. -When invoked, -.Ic getopts -places the value of the next option from the option string in the list in -the shell variable specified by -.Va var -and its index in the shell variable -.Ev OPTIND . -When the shell is invoked, -.Ev OPTIND -is initialized to 1. -For each option that requires an argument, the -.Ic getopts -builtin will place it in the shell variable -.Ev OPTARG . -If an option is not allowed for in the -.Va optstring , -then -.Ev OPTARG -will be unset. -.Pp -.Va optstring -is a string of recognized option letters (see -.Xr getopt 3 ) . -If a letter is followed by a colon, the option is expected to have an -argument which may or may not be separated from it by white space. -If an option character is not found where expected, -.Ic getopts -will set the variable -.Va var -to a -.Dq \&? ; -.Ic getopts -will then unset -.Ev OPTARG -and write output to standard error. -By specifying a colon as the first character of -.Va optstring -all errors will be ignored. -.Pp -After the last option -.Ic getopts -will return a non-zero value and set -.Va var -to -.Dq \&? . -.Pp -The following code fragment shows how one might process the arguments -for a command that can take the options -.Op a -and -.Op b , -and the option -.Op c , -which requires an argument. -.Pp -.Bd -literal -offset indent -while getopts abc: f -do - case $f in - a | b) flag=$f;; - c) carg=$OPTARG;; - \\?) echo $USAGE; exit 1;; - esac -done -shift `expr $OPTIND - 1` -.Ed -.Pp -This code will accept any of the following as equivalent: -.Pp -.Bd -literal -offset indent -cmd \-acarg file file -cmd \-a \-c arg file file -cmd \-carg -a file file -cmd \-a \-carg \-\- file file -.Ed -.It hash Fl rv Ar command ... -The shell maintains a hash table which remembers the -locations of commands. -With no arguments whatsoever, -the -.Ic hash -command prints out the contents of this table. -Entries which have not been looked at since the last -.Ic cd -command are marked with an asterisk; it is possible for these entries -to be invalid. -.Pp -With arguments, the -.Ic hash -command removes the specified commands from the hash table (unless -they are functions) and then locates them. -With the -.Fl v -option, hash prints the locations of the commands as it finds them. -The -.Fl r -option causes the hash command to delete all the entries in the hash table -except for functions. -.It pwd Op Fl LP -builtin command remembers what the current directory -is rather than recomputing it each time. -This makes it faster. -However, if the current directory is renamed, the builtin version of -.Ic pwd -will continue to print the old name for the directory. -The -.Fl P -option causes the physical value of the current working directory to be shown, -that is, all symbolic links are resolved to their respective values. The -.Fl L -option turns off the effect of any preceding -.Fl P -options. -.It Xo read Op Fl p Ar prompt -.Op Fl r -.Ar variable -.Op Ar ... -.Xc -The prompt is printed if the -.Fl p -option is specified and the standard input is a terminal. -Then a line is read from the standard input. -The trailing newline is deleted from the -line and the line is split as described in the section on word splitting -above, and the pieces are assigned to the variables in order. -At least one variable must be specified. -If there are more pieces than variables, the remaining pieces -(along with the characters in -.Ev IFS -that separated them) are assigned to the last variable. -If there are more variables than pieces, -the remaining variables are assigned the null string. -The -.Ic read -builtin will indicate success unless EOF is encountered on input, in -which case failure is returned. -.Pp -By default, unless the -.Fl r -option is specified, the backslash -.Dq \e -acts as an escape character, causing the following character to be treated -literally. -If a backslash is followed by a newline, the backslash and the -newline will be deleted. -.It readonly Ar name ... -.It readonly Fl p -The specified names are marked as read only, so that they cannot be -subsequently modified or unset. -The shell allows the value of a variable -to be set at the same time it is marked read only by writing -.Pp -.Dl readonly name=value -.Pp -With no arguments the readonly command lists the names of all read only -variables. -With the -.Fl p -option specified the output will be formatted suitably for non-interactive use. -.Pp -.It Xo printf Ar format -.Op Ar arguments ... -.Xc -.Ic printf -formats and prints its arguments, after the first, under control -of the -.Ar format . -The -.Ar format -is a character string which contains three types of objects: plain characters, -which are simply copied to standard output, character escape sequences which -are converted and copied to the standard output, and format specifications, -each of which causes printing of the next successive -.Ar argument . -.Pp -The -.Ar arguments -after the first are treated as strings if the corresponding format is -either -.Cm b , -.Cm c -or -.Cm s ; -otherwise it is evaluated as a C constant, with the following extensions: -.Pp -.Bl -bullet -offset indent -compact -.It -A leading plus or minus sign is allowed. -.It -If the leading character is a single or double quote, the value is the -.Tn ASCII -code of the next character. -.El -.Pp -The format string is reused as often as necessary to satisfy the -.Ar arguments . -Any extra format specifications are evaluated with zero or the null -string. -.Pp -Character escape sequences are in backslash notation as defined in -.St -ansiC . -The characters and their meanings are as follows: -.Bl -tag -width Ds -offset indent -.It Cm \ea -Write a \*[Lt]bell\*[Gt] character. -.It Cm \eb -Write a \*[Lt]backspace\*[Gt] character. -.It Cm \ef -Write a \*[Lt]form-feed\*[Gt] character. -.It Cm \en -Write a \*[Lt]new-line\*[Gt] character. -.It Cm \er -Write a \*[Lt]carriage return\*[Gt] character. -.It Cm \et -Write a \*[Lt]tab\*[Gt] character. -.It Cm \ev -Write a \*[Lt]vertical tab\*[Gt] character. -.It Cm \e\e -Write a backslash character. -.It Cm \e Ns Ar num -Write an 8\-bit character whose -.Tn ASCII -value is the 1\-, 2\-, or 3\-digit -octal number -.Ar num . -.El -.Pp -Each format specification is introduced by the percent character -(``%''). -The remainder of the format specification includes, -in the following order: -.Bl -tag -width Ds -.It "Zero or more of the following flags:" -.Bl -tag -width Ds -.It Cm # -A `#' character -specifying that the value should be printed in an ``alternative form''. -For -.Cm b , -.Cm c , -.Cm d , -and -.Cm s -formats, this option has no effect. -For the -.Cm o -format the precision of the number is increased to force the first -character of the output string to a zero. -For the -.Cm x -.Pq Cm X -format, a non-zero result has the string -.Li 0x -.Pq Li 0X -prepended to it. -For -.Cm e , -.Cm E , -.Cm f , -.Cm g , -and -.Cm G -formats, the result will always contain a decimal point, even if no -digits follow the point (normally, a decimal point only appears in the -results of those formats if a digit follows the decimal point). -For -.Cm g -and -.Cm G -formats, trailing zeros are not removed from the result as they -would otherwise be. -.It Cm \&\- -A minus sign `\-' which specifies -.Em left adjustment -of the output in the indicated field; -.It Cm \&+ -A `+' character specifying that there should always be -a sign placed before the number when using signed formats. -.It Sq \&\ \& -A space specifying that a blank should be left before a positive number -for a signed format. -A `+' overrides a space if both are used; -.It Cm \&0 -A zero `0' character indicating that zero-padding should be used -rather than blank-padding. -A `\-' overrides a `0' if both are used; -.El -.It "Field Width:" -An optional digit string specifying a -.Em field width ; -if the output string has fewer characters than the field width it will -be blank-padded on the left (or right, if the left-adjustment indicator -has been given) to make up the field width (note that a leading zero -is a flag, but an embedded zero is part of a field width); -.It Precision : -An optional period, -.Sq Cm \&.\& , -followed by an optional digit string giving a -.Em precision -which specifies the number of digits to appear after the decimal point, -for -.Cm e -and -.Cm f -formats, or the maximum number of bytes to be printed -from a string -.Sm off -.Pf ( Cm b -.Sm on -and -.Cm s -formats); if the digit string is missing, the precision is treated -as zero; -.It Format : -A character which indicates the type of format to use (one of -.Cm diouxXfwEgGbcs ) . -.El -.Pp -A field width or precision may be -.Sq Cm \&* -instead of a digit string. -In this case an -.Ar argument -supplies the field width or precision. -.Pp -The format characters and their meanings are: -.Bl -tag -width Fl -.It Cm diouXx -The -.Ar argument -is printed as a signed decimal (d or i), unsigned octal, unsigned decimal, -or unsigned hexadecimal (X or x), respectively. -.It Cm f -The -.Ar argument -is printed in the style -.Sm off -.Pf [\-]ddd Cm \&. No ddd -.Sm on -where the number of d's -after the decimal point is equal to the precision specification for -the argument. -If the precision is missing, 6 digits are given; if the precision -is explicitly 0, no digits and no decimal point are printed. -.It Cm eE -The -.Ar argument -is printed in the style -.Sm off -.Pf [\-]d Cm \&. No ddd Cm e No \*(Pmdd -.Sm on -where there -is one digit before the decimal point and the number after is equal to -the precision specification for the argument; when the precision is -missing, 6 digits are produced. -An upper-case E is used for an `E' format. -.It Cm gG -The -.Ar argument -is printed in style -.Cm f -or in style -.Cm e -.Pq Cm E -whichever gives full precision in minimum space. -.It Cm b -Characters from the string -.Ar argument -are printed with backslash-escape sequences expanded. -.br -The following additional backslash-escape sequences are supported: -.Bl -tag -width Ds -.It Cm \ec -Causes -.Nm -to ignore any remaining characters in the string operand containing it, -any remaining string operands, and any additional characters in -the format operand. -.It Cm \e0 Ns Ar num -Write an 8\-bit character whose -.Tn ASCII -value is the 1\-, 2\-, or 3\-digit -octal number -.Ar num . -.El -.It Cm c -The first character of -.Ar argument -is printed. -.It Cm s -Characters from the string -.Ar argument -are printed until the end is reached or until the number of bytes -indicated by the precision specification is reached; if the -precision is omitted, all characters in the string are printed. -.It Cm \&% -Print a `%'; no argument is used. -.El -.Pp -In no case does a non-existent or small field width cause truncation of -a field; padding takes place only if the specified field width exceeds -the actual width. -.It Xo set -.Oo { -.Fl options | Cm +options | Cm -- } -.Oc Ar arg ... -.Xc -The -.Ic set -command performs three different functions. -.Pp -With no arguments, it lists the values of all shell variables. -.Pp -If options are given, it sets the specified option -flags, or clears them as described in the section called -.Sx Argument List Processing . -As a special case, if the option is -o or +o and no argument is -supplied, the shell prints the settings of all its options. If the -option is -o, the settings are printed in a human-readable format; if -the option is +o, the settings are printed in a format suitable for -reinput to the shell to affect the same option settings. -.Pp -The third use of the set command is to set the values of the shell's -positional parameters to the specified args. -To change the positional -parameters without changing any options, use -.Dq -- -as the first argument to set. -If no args are present, the set command -will clear all the positional parameters (equivalent to executing -.Dq shift $# . ) -.It shift Op Ar n -Shift the positional parameters n times. -A -.Ic shift -sets the value of -.Va $1 -to the value of -.Va $2 , -the value of -.Va $2 -to the value of -.Va $3 , -and so on, decreasing -the value of -.Va $# -by one. -If n is greater than the number of positional parameters, -.Ic shift -will issue an error message, and exit with return status 2. -.It test Ar expression -.It \&[ Ar expression Cm \&] -The -.Ic test -utility evaluates the expression and, if it evaluates -to true, returns a zero (true) exit status; otherwise -it returns 1 (false). -If there is no expression, test also -returns 1 (false). -.Pp -All operators and flags are separate arguments to the -.Ic test -utility. -.Pp -The following primaries are used to construct expression: -.Bl -tag -width Ar -.It Fl b Ar file -True if -.Ar file -exists and is a block special -file. -.It Fl c Ar file -True if -.Ar file -exists and is a character -special file. -.It Fl d Ar file -True if -.Ar file -exists and is a directory. -.It Fl e Ar file -True if -.Ar file -exists (regardless of type). -.It Fl f Ar file -True if -.Ar file -exists and is a regular file. -.It Fl g Ar file -True if -.Ar file -exists and its set group ID flag -is set. -.It Fl h Ar file -True if -.Ar file -exists and is a symbolic link. -.It Fl k Ar file -True if -.Ar file -exists and its sticky bit is set. -.It Fl n Ar string -True if the length of -.Ar string -is nonzero. -.It Fl p Ar file -True if -.Ar file -is a named pipe -.Po Tn FIFO Pc . -.It Fl r Ar file -True if -.Ar file -exists and is readable. -.It Fl s Ar file -True if -.Ar file -exists and has a size greater -than zero. -.It Fl t Ar file_descriptor -True if the file whose file descriptor number -is -.Ar file_descriptor -is open and is associated with a terminal. -.It Fl u Ar file -True if -.Ar file -exists and its set user ID flag -is set. -.It Fl w Ar file -True if -.Ar file -exists and is writable. -True -indicates only that the write flag is on. -The file is not writable on a read-only file -system even if this test indicates true. -.It Fl x Ar file -True if -.Ar file -exists and is executable. -True -indicates only that the execute flag is on. -If -.Ar file -is a directory, true indicates that -.Ar file -can be searched. -.It Fl z Ar string -True if the length of -.Ar string -is zero. -.It Fl L Ar file -True if -.Ar file -exists and is a symbolic link. -This operator is retained for compatibility with previous versions of -this program. -Do not rely on its existence; use -.Fl h -instead. -.It Fl O Ar file -True if -.Ar file -exists and its owner matches the effective user id of this process. -.It Fl G Ar file -True if -.Ar file -exists and its group matches the effective group id of this process. -.It Fl S Ar file -True if -.Ar file -exists and is a socket. -.It Ar file1 Fl nt Ar file2 -True if -.Ar file1 -and -.Ar file2 -exist and -.Ar file1 -is newer than -.Ar file2 . -.It Ar file1 Fl ot Ar file2 -True if -.Ar file1 -and -.Ar file2 -exist and -.Ar file1 -is older than -.Ar file2 . -.It Ar file1 Fl ef Ar file2 -True if -.Ar file1 -and -.Ar file2 -exist and refer to the same file. -.It Ar string -True if -.Ar string -is not the null -string. -.It Ar \&s\&1 Cm \&= Ar \&s\&2 -True if the strings -.Ar \&s\&1 -and -.Ar \&s\&2 -are identical. -.It Ar \&s\&1 Cm \&!= Ar \&s\&2 -True if the strings -.Ar \&s\&1 -and -.Ar \&s\&2 -are not identical. -.It Ar \&s\&1 Cm \&\*[Lt] Ar \&s\&2 -True if string -.Ar \&s\&1 -comes before -.Ar \&s\&2 -based on the ASCII value of their characters. -.It Ar \&s\&1 Cm \&\*[Gt] Ar \&s\&2 -True if string -.Ar \&s\&1 -comes after -.Ar \&s\&2 -based on the ASCII value of their characters. -.It Ar \&n\&1 Fl \&eq Ar \&n\&2 -True if the integers -.Ar \&n\&1 -and -.Ar \&n\&2 -are algebraically -equal. -.It Ar \&n\&1 Fl \&ne Ar \&n\&2 -True if the integers -.Ar \&n\&1 -and -.Ar \&n\&2 -are not -algebraically equal. -.It Ar \&n\&1 Fl \> Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically -greater than the integer -.Ar \&n\&2 . -.It Ar \&n\&1 Fl \&ge Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically -greater than or equal to the integer -.Ar \&n\&2 . -.It Ar \&n\&1 Fl \< Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically less -than the integer -.Ar \&n\&2 . -.It Ar \&n\&1 Fl \&le Ar \&n\&2 -True if the integer -.Ar \&n\&1 -is algebraically less -than or equal to the integer -.Ar \&n\&2 . -.El -.Pp -These primaries can be combined with the following operators: -.Bl -tag -width Ar -.It Cm \&! Ar expression -True if -.Ar expression -is false. -.It Ar expression1 Fl a Ar expression2 -True if both -.Ar expression1 -and -.Ar expression2 -are true. -.It Ar expression1 Fl o Ar expression2 -True if either -.Ar expression1 -or -.Ar expression2 -are true. -.It Cm \&( Ns Ar expression Ns Cm \&) -True if expression is true. -.El -.Pp -The -.Fl a -operator has higher precedence than the -.Fl o -operator. -.It times -Print the accumulated user and system times for the shell and for processes -run from the shell. The return status is 0. -.It Xo trap -.Op Ar action Ar signal ... -.Xc -Cause the shell to parse and execute action when any of the specified -signals are received. -The signals are specified by signal number or as the name of the signal. -If -.Ar signal -is -.Li 0 -or -.Li EXIT , -the action is executed when the shell exits. -.Ar action -may be empty -.Li ( "''" ) , -which causes the specified signals to be ignored. -With -.Ar action -omitted or set to `-' the specified signals are set to their default action. -When the shell forks off a subshell, it resets trapped (but not ignored) -signals to the default action. -The -.Ic trap -command has no effect on signals that were -ignored on entry to the shell. -.Ic trap -without any arguments cause it to write a list of signals and their -associated action to the standard output in a format that is suitable -as an input to the shell that achieves the same trapping results. -.Pp -Examples: -.Pp -.Dl trap -.Pp -List trapped signals and their corresponding action -.Pp -.Dl trap '' INT QUIT tstp 30 -.Pp -Ignore signals INT QUIT TSTP USR1 -.Pp -.Dl trap date INT -.Pp -Print date upon receiving signal INT -.It type Op Ar name ... -Interpret each name as a command and print the resolution of the command -search. -Possible resolutions are: -shell keyword, alias, shell builtin, -command, tracked alias and not found. -For aliases the alias expansion is -printed; for commands and tracked aliases the complete pathname of the -command is printed. -.It ulimit Xo -.Op Fl H \*(Ba Fl S -.Op Fl a \*(Ba Fl tfdscmlpnv Op Ar value -.Xc -Inquire about or set the hard or soft limits on processes or set new -limits. -The choice between hard limit (which no process is allowed to -violate, and which may not be raised once it has been lowered) and soft -limit (which causes processes to be signaled but not necessarily killed, -and which may be raised) is made with these flags: -.Bl -tag -width Fl -.It Fl H -set or inquire about hard limits -.It Fl S -set or inquire about soft limits. -If neither -.Fl H -nor -.Fl S -is specified, the soft limit is displayed or both limits are set. -If both are specified, the last one wins. -.El -.Pp -The limit to be interrogated or set, then, is chosen by specifying -any one of these flags: -.Bl -tag -width Fl -.It Fl a -show all the current limits -.It Fl t -show or set the limit on CPU time (in seconds) -.It Fl f -show or set the limit on the largest file that can be created -(in 512-byte blocks) -.It Fl d -show or set the limit on the data segment size of a process (in kilobytes) -.It Fl s -show or set the limit on the stack size of a process (in kilobytes) -.It Fl c -show or set the limit on the largest core dump size that can be produced -(in 512-byte blocks) -.It Fl m -show or set the limit on the total physical memory that can be -in use by a process (in kilobytes) -.It Fl l -show or set the limit on how much memory a process can lock with -.Xr mlock 2 -(in kilobytes) -.It Fl p -show or set the limit on the number of processes this user can -have at one time -.It Fl n -show or set the limit on the number files a process can have open at once -.It Fl v -show or set the limit on the total virtual memory that can be -in use by a process (in kilobytes) -.It Fl r -show or set the limit on the real-time scheduling priority of a process -.El -.Pp -If none of these is specified, it is the limit on file size that is shown -or set. -If value is specified, the limit is set to that number; otherwise -the current limit is displayed. -.Pp -Limits of an arbitrary process can be displayed or set using the -.Xr sysctl 8 -utility. -.Pp -.It umask Op Ar mask -Set the value of umask (see -.Xr umask 2 ) -to the specified octal value. -If the argument is omitted, the umask value is printed. -.It unalias Xo -.Op Fl a -.Op Ar name -.Xc -If -.Ar name -is specified, the shell removes that alias. -If -.Fl a -is specified, all aliases are removed. -.It unset Xo -.Op Fl fv -.Ar name ... -.Xc -The specified variables and functions are unset and unexported. -If -.Fl f -or -.Fl v -is specified, the corresponding function or variable is unset, respectively. -If a given name corresponds to both a variable and a function, and no -options are given, only the variable is unset. -.It wait Op Ar job -Wait for the specified job to complete and return the exit status of the -last process in the job. -If the argument is omitted, wait for all jobs to -complete and return an exit status of zero. -.El -.Ss Command Line Editing -When -.Nm -is being used interactively from a terminal, the current command -and the command history (see -.Ic fc -in -.Sx Builtins ) -can be edited using vi-mode command-line editing. -This mode uses commands, described below, -similar to a subset of those described in the vi man page. -The command -.Ql set -o vi -enables vi-mode editing and places sh into vi insert mode. -With vi-mode -enabled, sh can be switched between insert mode and command mode. -It is similar to vi: typing -.Aq ESC -enters vi command mode. -Hitting -.Aq return -while in command mode will pass the line to the shell. -.Sh EXIT STATUS -Errors that are detected by the shell, such as a syntax error, will cause the -shell to exit with a non-zero exit status. -If the shell is not an -interactive shell, the execution of the shell file will be aborted. -Otherwise -the shell will return the exit status of the last command executed, or -if the exit builtin is used with a numeric argument, it will return the -argument. -.Sh ENVIRONMENT -.Bl -tag -width MAILCHECK -.It Ev HOME -Set automatically by -.Xr login 1 -from the user's login directory in the password file -.Pq Xr passwd 4 . -This environment variable also functions as the default argument for the -cd builtin. -.It Ev PATH -The default search path for executables. -See the above section -.Sx Path Search . -.It Ev CDPATH -The search path used with the cd builtin. -.It Ev MAIL -The name of a mail file, that will be checked for the arrival of new mail. -Overridden by -.Ev MAILPATH . -.It Ev MAILCHECK -The frequency in seconds that the shell checks for the arrival of mail -in the files specified by the -.Ev MAILPATH -or the -.Ev MAIL -file. -If set to 0, the check will occur at each prompt. -.It Ev MAILPATH -A colon -.Dq \&: -separated list of file names, for the shell to check for incoming mail. -This environment setting overrides the -.Ev MAIL -setting. -There is a maximum of 10 mailboxes that can be monitored at once. -.It Ev PS1 -The primary prompt string, which defaults to -.Dq $\ , -unless you are the superuser, in which case it defaults to -.Dq #\ . -.It Ev PS2 -The secondary prompt string, which defaults to -.Dq \*[Gt]\ . -.It Ev PS4 -Output before each line when execution trace (set -x) is enabled, -defaults to -.Dq +\ . -.It Ev RPS1 -The primary right prompt string. -.It Ev RPS2 -The secondary right prompt string. -.It Ev IFS -Input Field Separators. -This is normally set to -.Aq space , -.Aq tab , -and -.Aq newline . -See the -.Sx White Space Splitting -section for more details. -.It Ev TERM -The default terminal setting for the shell. -This is inherited by -children of the shell, and is used in the history editing modes. -.It Ev HISTSIZE -The number of lines in the history buffer for the shell. -.It Ev PWD -The logical value of the current working directory. This is set by the -.Ic cd -command. -.It Ev OLDPWD -The previous logical value of the current working directory. This is set by -the -.Ic cd -command. -.It Ev PPID -The process ID of the parent process of the shell. -.El -.Sh FILES -.Bl -item -width HOMEprofilexxxx -.It -.Pa $HOME/.profile -.It -.Pa /etc/profile -.El -.Sh SEE ALSO -.Xr csh 1 , -.Xr echo 1 , -.Xr getopt 1 , -.Xr ksh 1 , -.Xr login 1 , -.Xr printf 1 , -.Xr test 1 , -.Xr getopt 3 , -.Xr passwd 5 , -.\" .Xr profile 4 , -.Xr environ 7 , -.Xr sysctl 8 -.Sh HISTORY -.Nm -is a POSIX-compliant implementation of /bin/sh that aims to be as small as -possible. -.Nm -is a direct descendant of the NetBSD version of ash (the Almquist SHell), -ported to Linux in early 1997. -It was renamed to -.Nm -in 2002. -.Sh BUGS -Setuid shell scripts should be avoided at all costs, as they are a -significant security risk. -.Pp -PS1, PS2, and PS4 should be subject to parameter expansion before -being displayed. diff --git a/bin/dash/src/error.c b/bin/dash/src/error.c deleted file mode 100644 index 728ff885..00000000 --- a/bin/dash/src/error.c +++ /dev/null @@ -1,238 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Errors and exceptions. - */ - -#include <signal.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <stdio.h> -#include <string.h> - -#include "jobs.h" -#include "shell.h" -#include "main.h" -#include "options.h" -#include "output.h" -#include "error.h" -#include "show.h" -#include "eval.h" -#include "parser.h" -#include "system.h" - - -/* - * Code to handle exceptions in C. - */ - -struct jmploc *handler; -int exception; -int suppressint; -volatile sig_atomic_t intpending; -int errlinno; - - -static void exverror(int, const char *, va_list) - __attribute__((__noreturn__)); - -/* - * Called to raise an exception. Since C doesn't include exceptions, we - * just do a longjmp to the exception handler. The type of exception is - * stored in the global variable "exception". - */ - -void -exraise(int e) -{ -#ifdef DEBUG - if (handler == NULL) - abort(); -#endif - - if (vforked) - _exit(exitstatus); - - INTOFF; - - exception = e; - longjmp(handler->loc, 1); -} - - -/* - * Called from trap.c when a SIGINT is received. (If the user specifies - * that SIGINT is to be trapped or ignored using the trap builtin, then - * this routine is not called.) Suppressint is nonzero when interrupts - * are held using the INTOFF macro. (The test for iflag is just - * defensive programming.) - */ - -void -onint(void) { - - intpending = 0; - sigclearmask(); - if (!(rootshell && iflag)) { - signal(SIGINT, SIG_DFL); - raise(SIGINT); - } - exitstatus = SIGINT + 128; - exraise(EXINT); - /* NOTREACHED */ -} - -static void -exvwarning2(const char *msg, va_list ap) -{ - struct output *errs; - const char *name; - const char *fmt; - - errs = out2; - name = arg0 ? arg0 : "sh"; - if (!commandname) - fmt = "%s: %d: "; - else - fmt = "%s: %d: %s: "; - outfmt(errs, fmt, name, errlinno, commandname); - doformat(errs, msg, ap); -#if FLUSHERR - outc('\n', errs); -#else - outcslow('\n', errs); -#endif -} - -#define exvwarning(a, b, c) exvwarning2(b, c) - -/* - * Exverror is called to raise the error exception. If the second argument - * is not NULL then error prints an error message using printf style - * formatting. It then raises the error exception. - */ -static void -exverror(int cond, const char *msg, va_list ap) -{ -#ifdef DEBUG - if (msg) { - va_list aq; - TRACE(("exverror(%d, \"", cond)); - va_copy(aq, ap); - TRACEV((msg, aq)); - va_end(aq); - TRACE(("\") pid=%d\n", getpid())); - } else - TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid())); - if (msg) -#endif - exvwarning(-1, msg, ap); - - flushall(); - exraise(cond); - /* NOTREACHED */ -} - - -void -sh_error(const char *msg, ...) -{ - va_list ap; - - exitstatus = 2; - - va_start(ap, msg); - exverror(EXERROR, msg, ap); - /* NOTREACHED */ - va_end(ap); -} - - -void -exerror(int cond, const char *msg, ...) -{ - va_list ap; - - va_start(ap, msg); - exverror(cond, msg, ap); - /* NOTREACHED */ - va_end(ap); -} - -/* - * error/warning routines for external builtins - */ - -void -sh_warnx(const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - exvwarning(-1, fmt, ap); - va_end(ap); -} - - -/* - * Return a string describing an error. The returned string may be a - * pointer to a static buffer that will be overwritten on the next call. - * Action describes the operation that got the error. - */ - -const char * -errmsg(int e, int action) -{ - if (e != ENOENT && e != ENOTDIR) - return strerror(e); - - if (action & E_OPEN) - return "No such file"; - else if (action & E_CREAT) - return "Directory nonexistent"; - else - return "not found"; -} - - -#ifdef REALLY_SMALL -void -__inton() { - if (--suppressint == 0 && intpending) { - onint(); - } -} -#endif diff --git a/bin/dash/src/error.h b/bin/dash/src/error.h deleted file mode 100644 index 94e30a27..00000000 --- a/bin/dash/src/error.h +++ /dev/null @@ -1,129 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)error.h 8.2 (Berkeley) 5/4/95 - */ - -#include <setjmp.h> -#include <signal.h> - -/* - * Types of operations (passed to the errmsg routine). - */ - -#define E_OPEN 01 /* opening a file */ -#define E_CREAT 02 /* creating a file */ -#define E_EXEC 04 /* executing a program */ - - -/* - * We enclose jmp_buf in a structure so that we can declare pointers to - * jump locations. The global variable handler contains the location to - * jump to when an exception occurs, and the global variable exception - * contains a code identifying the exeception. To implement nested - * exception handlers, the user should save the value of handler on entry - * to an inner scope, set handler to point to a jmploc structure for the - * inner scope, and restore handler on exit from the scope. - */ - -struct jmploc { - jmp_buf loc; -}; - -extern struct jmploc *handler; -extern int exception; - -/* exceptions */ -#define EXINT 0 /* SIGINT received */ -#define EXERROR 1 /* a generic error */ -#define EXEND 3 /* exit the shell */ -#define EXEXIT 4 /* exit the shell via exitcmd */ - - -/* - * These macros allow the user to suspend the handling of interrupt signals - * over a period of time. This is similar to SIGHOLD to or sigblock, but - * much more efficient and portable. (But hacking the kernel is so much - * more fun than worrying about efficiency and portability. :-)) - */ - -extern int suppressint; -extern volatile sig_atomic_t intpending; - -#define barrier() ({ __asm__ __volatile__ ("": : :"memory"); }) -#define INTOFF \ - ({ \ - suppressint++; \ - barrier(); \ - 0; \ - }) -#ifdef REALLY_SMALL -void __inton(void); -#define INTON __inton() -#else -#define INTON \ - ({ \ - barrier(); \ - if (--suppressint == 0 && intpending) onint(); \ - 0; \ - }) -#endif -#define FORCEINTON \ - ({ \ - barrier(); \ - suppressint = 0; \ - if (intpending) onint(); \ - 0; \ - }) -#define SAVEINT(v) ((v) = suppressint) -#define RESTOREINT(v) \ - ({ \ - barrier(); \ - if ((suppressint = (v)) == 0 && intpending) onint(); \ - 0; \ - }) -#define CLEAR_PENDING_INT intpending = 0 -#define int_pending() intpending - -void exraise(int) __attribute__((__noreturn__)); -#ifdef USE_NORETURN -void onint(void) __attribute__((__noreturn__)); -#else -void onint(void); -#endif -extern int errlinno; -void sh_error(const char *, ...) __attribute__((__noreturn__)); -void exerror(int, const char *, ...) __attribute__((__noreturn__)); -const char *errmsg(int, int); - -void sh_warnx(const char *, ...); diff --git a/bin/dash/src/eval.c b/bin/dash/src/eval.c deleted file mode 100644 index d4190f95..00000000 --- a/bin/dash/src/eval.c +++ /dev/null @@ -1,1139 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <stdlib.h> -#include <signal.h> -#include <unistd.h> -#include <sys/types.h> - -/* - * Evaluate a command. - */ - -#include "init.h" -#include "main.h" -#include "shell.h" -#include "nodes.h" -#include "syntax.h" -#include "expand.h" -#include "parser.h" -#include "jobs.h" -#include "eval.h" -#include "builtins.h" -#include "options.h" -#include "exec.h" -#include "redir.h" -#include "input.h" -#include "output.h" -#include "trap.h" -#include "var.h" -#include "memalloc.h" -#include "error.h" -#include "show.h" -#include "mystring.h" -#ifndef SMALL -#include "myhistedit.h" -#endif - - -int evalskip; /* set if we are skipping commands */ -STATIC int skipcount; /* number of levels to skip */ -MKINIT int loopnest; /* current loop nesting level */ -static int funcline; /* starting line number of current function, or 0 if not in a function */ - - -char *commandname; -int exitstatus; /* exit status of last command */ -int back_exitstatus; /* exit status of backquoted command */ -int savestatus = -1; /* exit status of last command outside traps */ - - -#if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3) -STATIC -#endif -void evaltreenr(union node *, int) __attribute__ ((__noreturn__)); -STATIC int evalloop(union node *, int); -STATIC int evalfor(union node *, int); -STATIC int evalcase(union node *, int); -STATIC int evalsubshell(union node *, int); -STATIC void expredir(union node *); -STATIC int evalpipe(union node *, int); -#ifdef notyet -STATIC int evalcommand(union node *, int, struct backcmd *); -#else -STATIC int evalcommand(union node *, int); -#endif -STATIC int evalbltin(const struct builtincmd *, int, char **, int); -STATIC int evalfun(struct funcnode *, int, char **, int); -STATIC void prehash(union node *); -STATIC int eprintlist(struct output *, struct strlist *, int); -STATIC int bltincmd(int, char **); - - -STATIC const struct builtincmd bltin = { - .name = nullstr, - .builtin = bltincmd, - .flags = BUILTIN_REGULAR, -}; - - -/* - * Called to reset things after an exception. - */ - -#ifdef mkinit -INCLUDE "eval.h" - -EXITRESET { - if (savestatus >= 0) { - if (exception == EXEXIT || evalskip == SKIPFUNCDEF) - exitstatus = savestatus; - savestatus = -1; - } - evalskip = 0; - loopnest = 0; -} -#endif - - - -/* - * The eval commmand. - */ - -static int evalcmd(int argc, char **argv, int flags) -{ - char *p; - char *concat; - char **ap; - - if (argc > 1) { - p = argv[1]; - if (argc > 2) { - STARTSTACKSTR(concat); - ap = argv + 2; - for (;;) { - concat = stputs(p, concat); - if ((p = *ap++) == NULL) - break; - STPUTC(' ', concat); - } - STPUTC('\0', concat); - p = grabstackstr(concat); - } - return evalstring(p, flags & EV_TESTED); - } - return 0; -} - - -/* - * Execute a command or commands contained in a string. - */ - -int -evalstring(char *s, int flags) -{ - union node *n; - struct stackmark smark; - int status; - - s = sstrdup(s); - setinputstring(s); - setstackmark(&smark); - - status = 0; - for (; (n = parsecmd(0)) != NEOF; popstackmark(&smark)) { - int i; - - i = evaltree(n, flags & ~(parser_eof() ? 0 : EV_EXIT)); - if (n) - status = i; - - if (evalskip) - break; - } - popstackmark(&smark); - popfile(); - stunalloc(s); - - return status; -} - - - -/* - * Evaluate a parse tree. The value is left in the global variable - * exitstatus. - */ - -int -evaltree(union node *n, int flags) -{ - int checkexit = 0; - int (*evalfn)(union node *, int); - struct stackmark smark; - unsigned isor; - int status = 0; - - setstackmark(&smark); - - if (n == NULL) { - TRACE(("evaltree(NULL) called\n")); - goto out; - } - - dotrap(); - -#ifndef SMALL - displayhist = 1; /* show history substitutions done with fc */ -#endif - TRACE(("pid %d, evaltree(%p: %d, %d) called\n", - getpid(), n, n->type, flags)); - switch (n->type) { - default: -#ifdef DEBUG - out1fmt("Node type = %d\n", n->type); -#ifndef USE_GLIBC_STDIO - flushout(out1); -#endif - break; -#endif - case NNOT: - status = !evaltree(n->nnot.com, EV_TESTED); - goto setstatus; - case NREDIR: - errlinno = lineno = n->nredir.linno; - if (funcline) - lineno -= funcline - 1; - expredir(n->nredir.redirect); - pushredir(n->nredir.redirect); - status = redirectsafe(n->nredir.redirect, REDIR_PUSH) ?: - evaltree(n->nredir.n, flags & EV_TESTED); - if (n->nredir.redirect) - popredir(0); - goto setstatus; - case NCMD: - evalfn = evalcommand; -checkexit: - checkexit = ~flags & EV_TESTED; - goto calleval; - case NFOR: - evalfn = evalfor; - goto calleval; - case NWHILE: - case NUNTIL: - evalfn = evalloop; - goto calleval; - case NSUBSHELL: - case NBACKGND: - evalfn = evalsubshell; - goto checkexit; - case NPIPE: - evalfn = evalpipe; - goto checkexit; - case NCASE: - evalfn = evalcase; - goto calleval; - case NAND: - case NOR: - case NSEMI: -#if NAND + 1 != NOR -#error NAND + 1 != NOR -#endif -#if NOR + 1 != NSEMI -#error NOR + 1 != NSEMI -#endif - isor = n->type - NAND; - status = evaltree(n->nbinary.ch1, - (flags | ((isor >> 1) - 1)) & EV_TESTED); - if ((!status) == isor || evalskip) - break; - n = n->nbinary.ch2; -evaln: - evalfn = evaltree; -calleval: - status = evalfn(n, flags); - goto setstatus; - case NIF: - status = evaltree(n->nif.test, EV_TESTED); - if (evalskip) - break; - if (!status) { - n = n->nif.ifpart; - goto evaln; - } else if (n->nif.elsepart) { - n = n->nif.elsepart; - goto evaln; - } - status = 0; - goto setstatus; - case NDEFUN: - defun(n); -setstatus: - exitstatus = status; - break; - } -out: - dotrap(); - - if (eflag && checkexit && status) - goto exexit; - - if (flags & EV_EXIT) { -exexit: - exraise(EXEND); - } - - popstackmark(&smark); - - return exitstatus; -} - - -#if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3) -STATIC -#endif -void evaltreenr(union node *n, int flags) -#ifdef HAVE_ATTRIBUTE_ALIAS - __attribute__ ((alias("evaltree"))); -#else -{ - evaltree(n, flags); - abort(); -} -#endif - - -static int skiploop(void) -{ - int skip = evalskip; - - switch (skip) { - case 0: - break; - - case SKIPBREAK: - case SKIPCONT: - if (likely(--skipcount <= 0)) { - evalskip = 0; - break; - } - - skip = SKIPBREAK; - break; - } - - return skip; -} - - -STATIC int -evalloop(union node *n, int flags) -{ - int skip; - int status; - - loopnest++; - status = 0; - flags &= EV_TESTED; - do { - int i; - - i = evaltree(n->nbinary.ch1, EV_TESTED); - skip = skiploop(); - if (skip == SKIPFUNC) - status = i; - if (skip) - continue; - if (n->type != NWHILE) - i = !i; - if (i != 0) - break; - status = evaltree(n->nbinary.ch2, flags); - skip = skiploop(); - } while (!(skip & ~SKIPCONT)); - loopnest--; - - return status; -} - - - -STATIC int -evalfor(union node *n, int flags) -{ - struct arglist arglist; - union node *argp; - struct strlist *sp; - int status; - - errlinno = lineno = n->nfor.linno; - if (funcline) - lineno -= funcline - 1; - - arglist.lastp = &arglist.list; - for (argp = n->nfor.args ; argp ; argp = argp->narg.next) { - expandarg(argp, &arglist, EXP_FULL | EXP_TILDE); - } - *arglist.lastp = NULL; - - status = 0; - loopnest++; - flags &= EV_TESTED; - for (sp = arglist.list ; sp ; sp = sp->next) { - setvar(n->nfor.var, sp->text, 0); - status = evaltree(n->nfor.body, flags); - if (skiploop() & ~SKIPCONT) - break; - } - loopnest--; - - return status; -} - - - -STATIC int -evalcase(union node *n, int flags) -{ - union node *cp; - union node *patp; - struct arglist arglist; - int status = 0; - - errlinno = lineno = n->ncase.linno; - if (funcline) - lineno -= funcline - 1; - - arglist.lastp = &arglist.list; - expandarg(n->ncase.expr, &arglist, EXP_TILDE); - for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) { - for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) { - if (casematch(patp, arglist.list->text)) { - /* Ensure body is non-empty as otherwise - * EV_EXIT may prevent us from setting the - * exit status. - */ - if (evalskip == 0 && cp->nclist.body) { - status = evaltree(cp->nclist.body, - flags); - } - goto out; - } - } - } -out: - return status; -} - - - -/* - * Kick off a subshell to evaluate a tree. - */ - -STATIC int -evalsubshell(union node *n, int flags) -{ - struct job *jp; - int backgnd = (n->type == NBACKGND); - int status; - - errlinno = lineno = n->nredir.linno; - if (funcline) - lineno -= funcline - 1; - - expredir(n->nredir.redirect); - INTOFF; - if (!backgnd && flags & EV_EXIT && !have_traps()) { - forkreset(); - goto nofork; - } - jp = makejob(n, 1); - if (forkshell(jp, n, backgnd) == 0) { - flags |= EV_EXIT; - if (backgnd) - flags &=~ EV_TESTED; -nofork: - INTON; - redirect(n->nredir.redirect, 0); - evaltreenr(n->nredir.n, flags); - /* never returns */ - } - status = 0; - if (! backgnd) - status = waitforjob(jp); - INTON; - return status; -} - - - -/* - * Compute the names of the files in a redirection list. - */ - -STATIC void -expredir(union node *n) -{ - union node *redir; - - for (redir = n ; redir ; redir = redir->nfile.next) { - struct arglist fn; - fn.lastp = &fn.list; - switch (redir->type) { - case NFROMTO: - case NFROM: - case NTO: - case NCLOBBER: - case NAPPEND: - expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR); - redir->nfile.expfname = fn.list->text; - break; - case NFROMFD: - case NTOFD: - if (redir->ndup.vname) { - expandarg(redir->ndup.vname, &fn, EXP_TILDE | EXP_REDIR); - fixredir(redir, fn.list->text, 1); - } - break; - } - } -} - - - -/* - * Evaluate a pipeline. All the processes in the pipeline are children - * of the process creating the pipeline. (This differs from some versions - * of the shell, which make the last process in a pipeline the parent - * of all the rest.) - */ - -STATIC int -evalpipe(union node *n, int flags) -{ - struct job *jp; - struct nodelist *lp; - int pipelen; - int prevfd; - int pip[2]; - int status = 0; - - TRACE(("evalpipe(0x%lx) called\n", (long)n)); - pipelen = 0; - for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) - pipelen++; - flags |= EV_EXIT; - INTOFF; - jp = makejob(n, pipelen); - prevfd = -1; - for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { - prehash(lp->n); - pip[1] = -1; - if (lp->next) { - if (pipe(pip) < 0) { - close(prevfd); - sh_error("Pipe call failed"); - } - } - if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) { - INTON; - if (pip[1] >= 0) { - close(pip[0]); - } - if (prevfd > 0) { - dup2(prevfd, 0); - close(prevfd); - } - if (pip[1] > 1) { - dup2(pip[1], 1); - close(pip[1]); - } - evaltreenr(lp->n, flags); - /* never returns */ - } - if (prevfd >= 0) - close(prevfd); - prevfd = pip[0]; - close(pip[1]); - } - if (n->npipe.backgnd == 0) { - status = waitforjob(jp); - TRACE(("evalpipe: job done exit status %d\n", status)); - } - INTON; - - return status; -} - - - -/* - * Execute a command inside back quotes. If it's a builtin command, we - * want to save its output in a block obtained from malloc. Otherwise - * we fork off a subprocess and get the output of the command via a pipe. - * Should be called with interrupts off. - */ - -void -evalbackcmd(union node *n, struct backcmd *result) -{ - int pip[2]; - struct job *jp; - - result->fd = -1; - result->buf = NULL; - result->nleft = 0; - result->jp = NULL; - if (n == NULL) { - goto out; - } - - if (pipe(pip) < 0) - sh_error("Pipe call failed"); - jp = makejob(n, 1); - if (forkshell(jp, n, FORK_NOJOB) == 0) { - FORCEINTON; - close(pip[0]); - if (pip[1] != 1) { - dup2(pip[1], 1); - close(pip[1]); - } - ifsfree(); - evaltreenr(n, EV_EXIT); - /* NOTREACHED */ - } - close(pip[1]); - result->fd = pip[0]; - result->jp = jp; - -out: - TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n", - result->fd, result->buf, result->nleft, result->jp)); -} - -static struct strlist *fill_arglist(struct arglist *arglist, - union node **argpp) -{ - struct strlist **lastp = arglist->lastp; - union node *argp; - - while ((argp = *argpp)) { - expandarg(argp, arglist, EXP_FULL | EXP_TILDE); - *argpp = argp->narg.next; - if (*lastp) - break; - } - - return *lastp; -} - -static int parse_command_args(struct arglist *arglist, union node **argpp, - const char **path) -{ - struct strlist *sp = arglist->list; - char *cp, c; - - for (;;) { - sp = unlikely(sp->next) ? sp->next : - fill_arglist(arglist, argpp); - if (!sp) - return 0; - cp = sp->text; - if (*cp++ != '-') - break; - if (!(c = *cp++)) - break; - if (c == '-' && !*cp) { - if (likely(!sp->next) && !fill_arglist(arglist, argpp)) - return 0; - sp = sp->next; - break; - } - do { - switch (c) { - case 'p': - *path = defpath; - break; - default: - /* run 'typecmd' for other options */ - return 0; - } - } while ((c = *cp++)); - } - - arglist->list = sp; - return DO_NOFUNC; -} - -/* - * Execute a simple command. - */ - -STATIC int -#ifdef notyet -evalcommand(union node *cmd, int flags, struct backcmd *backcmd) -#else -evalcommand(union node *cmd, int flags) -#endif -{ - struct localvar_list *localvar_stop; - struct parsefile *file_stop; - struct redirtab *redir_stop; - union node *argp; - struct arglist arglist; - struct arglist varlist; - char **argv; - int argc; - struct strlist *osp; - struct strlist *sp; -#ifdef notyet - int pip[2]; -#endif - struct cmdentry cmdentry; - struct job *jp; - char *lastarg; - const char *path; - int spclbltin; - int cmd_flag; - int execcmd; - int status; - char **nargv; - int vflags; - int vlocal; - - errlinno = lineno = cmd->ncmd.linno; - if (funcline) - lineno -= funcline - 1; - - /* First expand the arguments. */ - TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags)); - file_stop = parsefile; - back_exitstatus = 0; - - cmdentry.cmdtype = CMDBUILTIN; - cmdentry.u.cmd = &bltin; - varlist.lastp = &varlist.list; - *varlist.lastp = NULL; - arglist.lastp = &arglist.list; - *arglist.lastp = NULL; - - cmd_flag = 0; - execcmd = 0; - spclbltin = -1; - vflags = 0; - vlocal = 0; - path = NULL; - - argc = 0; - argp = cmd->ncmd.args; - if ((osp = fill_arglist(&arglist, &argp))) { - int pseudovarflag = 0; - - for (;;) { - find_command(arglist.list->text, &cmdentry, - cmd_flag | DO_REGBLTIN, pathval()); - - vlocal++; - - /* implement bltin and command here */ - if (cmdentry.cmdtype != CMDBUILTIN) - break; - - pseudovarflag = cmdentry.u.cmd->flags & BUILTIN_ASSIGN; - if (likely(spclbltin < 0)) { - spclbltin = - cmdentry.u.cmd->flags & - BUILTIN_SPECIAL - ; - vlocal = spclbltin ^ BUILTIN_SPECIAL; - } - execcmd = cmdentry.u.cmd == EXECCMD; - if (likely(cmdentry.u.cmd != COMMANDCMD)) - break; - - cmd_flag = parse_command_args(&arglist, &argp, &path); - if (!cmd_flag) - break; - } - - for (; argp; argp = argp->narg.next) - expandarg(argp, &arglist, - pseudovarflag && - isassignment(argp->narg.text) ? - EXP_VARTILDE : EXP_FULL | EXP_TILDE); - - for (sp = arglist.list; sp; sp = sp->next) - argc++; - - if (execcmd && argc > 1) - vflags = VEXPORT; - } - - localvar_stop = pushlocalvars(vlocal); - - /* Reserve one extra spot at the front for shellexec. */ - nargv = stalloc(sizeof (char *) * (argc + 2)); - argv = ++nargv; - for (sp = arglist.list ; sp ; sp = sp->next) { - TRACE(("evalcommand arg: %s\n", sp->text)); - *nargv++ = sp->text; - } - *nargv = NULL; - - lastarg = NULL; - if (iflag && funcline == 0 && argc > 0) - lastarg = nargv[-1]; - - preverrout.fd = 2; - expredir(cmd->ncmd.redirect); - redir_stop = pushredir(cmd->ncmd.redirect); - status = redirectsafe(cmd->ncmd.redirect, REDIR_PUSH|REDIR_SAVEFD2); - - if (unlikely(status)) { -bail: - exitstatus = status; - - /* We have a redirection error. */ - if (spclbltin > 0) - exraise(EXERROR); - - goto out; - } - - for (argp = cmd->ncmd.assign; argp; argp = argp->narg.next) { - struct strlist **spp; - - spp = varlist.lastp; - expandarg(argp, &varlist, EXP_VARTILDE); - - if (vlocal) - mklocal((*spp)->text, VEXPORT); - else - setvareq((*spp)->text, vflags); - } - - /* Print the command if xflag is set. */ - if (xflag) { - struct output *out; - int sep; - - out = &preverrout; - outstr(expandstr(ps4val()), out); - sep = 0; - sep = eprintlist(out, varlist.list, sep); - eprintlist(out, osp, sep); - outcslow('\n', out); -#ifdef FLUSHERR - flushout(out); -#endif - } - - /* Now locate the command. */ - if (cmdentry.cmdtype != CMDBUILTIN || - !(cmdentry.u.cmd->flags & BUILTIN_REGULAR)) { - path = unlikely(path) ? path : pathval(); - find_command(argv[0], &cmdentry, cmd_flag | DO_ERR, path); - } - - jp = NULL; - - /* Execute the command. */ - switch (cmdentry.cmdtype) { - case CMDUNKNOWN: - status = 127; -#ifdef FLUSHERR - flushout(&errout); -#endif - goto bail; - - default: - /* Fork off a child process if necessary. */ - if (!(flags & EV_EXIT) || have_traps()) { - INTOFF; - jp = vforkexec(cmd, argv, path, cmdentry.u.index); - break; - } - shellexec(argv, path, cmdentry.u.index); - /* NOTREACHED */ - - case CMDBUILTIN: - if (evalbltin(cmdentry.u.cmd, argc, argv, flags) && - !(exception == EXERROR && spclbltin <= 0)) { -raise: - longjmp(handler->loc, 1); - } - break; - - case CMDFUNCTION: - if (evalfun(cmdentry.u.func, argc, argv, flags)) - goto raise; - break; - } - - status = waitforjob(jp); - FORCEINTON; - -out: - if (cmd->ncmd.redirect) - popredir(execcmd); - unwindredir(redir_stop); - unwindfiles(file_stop); - unwindlocalvars(localvar_stop); - if (lastarg) - /* dsl: I think this is intended to be used to support - * '_' in 'vi' command mode during line editing... - * However I implemented that within libedit itself. - */ - setvar("_", lastarg, 0); - - return status; -} - -STATIC int -evalbltin(const struct builtincmd *cmd, int argc, char **argv, int flags) -{ - char *volatile savecmdname; - struct jmploc *volatile savehandler; - struct jmploc jmploc; - int status; - int i; - - savecmdname = commandname; - savehandler = handler; - if ((i = setjmp(jmploc.loc))) - goto cmddone; - handler = &jmploc; - commandname = argv[0]; - argptr = argv + 1; - optptr = NULL; /* initialize nextopt */ - if (cmd == EVALCMD) - status = evalcmd(argc, argv, flags); - else - status = (*cmd->builtin)(argc, argv); - flushall(); - if (outerr(out1)) - sh_warnx("%s: I/O error", commandname); - status |= outerr(out1); - exitstatus = status; -cmddone: - freestdout(); - commandname = savecmdname; - handler = savehandler; - - return i; -} - -STATIC int -evalfun(struct funcnode *func, int argc, char **argv, int flags) -{ - volatile struct shparam saveparam; - struct jmploc *volatile savehandler; - struct jmploc jmploc; - int e; - int savefuncline; - int saveloopnest; - - saveparam = shellparam; - savefuncline = funcline; - saveloopnest = loopnest; - savehandler = handler; - if ((e = setjmp(jmploc.loc))) { - goto funcdone; - } - INTOFF; - handler = &jmploc; - shellparam.malloc = 0; - func->count++; - funcline = func->n.ndefun.linno; - loopnest = 0; - INTON; - shellparam.nparam = argc - 1; - shellparam.p = argv + 1; - shellparam.optind = 1; - shellparam.optoff = -1; - evaltree(func->n.ndefun.body, flags & EV_TESTED); -funcdone: - INTOFF; - loopnest = saveloopnest; - funcline = savefuncline; - freefunc(func); - freeparam(&shellparam); - shellparam = saveparam; - handler = savehandler; - INTON; - evalskip &= ~(SKIPFUNC | SKIPFUNCDEF); - return e; -} - - -/* - * Search for a command. This is called before we fork so that the - * location of the command will be available in the parent as well as - * the child. The check for "goodname" is an overly conservative - * check that the name will not be subject to expansion. - */ - -STATIC void -prehash(union node *n) -{ - struct cmdentry entry; - - if (n->type == NCMD && n->ncmd.args) - if (goodname(n->ncmd.args->narg.text)) - find_command(n->ncmd.args->narg.text, &entry, 0, - pathval()); -} - - - -/* - * Builtin commands. Builtin commands whose functions are closely - * tied to evaluation are implemented here. - */ - -/* - * No command given. - */ - -STATIC int -bltincmd(int argc, char **argv) -{ - /* - * Preserve exitstatus of a previous possible redirection - * as POSIX mandates - */ - return back_exitstatus; -} - - -/* - * Handle break and continue commands. Break, continue, and return are - * all handled by setting the evalskip flag. The evaluation routines - * above all check this flag, and if it is set they start skipping - * commands rather than executing them. The variable skipcount is - * the number of loops to break/continue, or the number of function - * levels to return. (The latter is always 1.) It should probably - * be an error to break out of more loops than exist, but it isn't - * in the standard shell so we don't make it one here. - */ - -int -breakcmd(int argc, char **argv) -{ - int n = argc > 1 ? number(argv[1]) : 1; - - if (n <= 0) - badnum(argv[1]); - if (n > loopnest) - n = loopnest; - if (n > 0) { - evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK; - skipcount = n; - } - return 0; -} - - -/* - * The return command. - */ - -int -returncmd(int argc, char **argv) -{ - int skip; - int status; - - /* - * If called outside a function, do what ksh does; - * skip the rest of the file. - */ - if (argv[1]) { - skip = SKIPFUNC; - status = number(argv[1]); - } else { - skip = SKIPFUNCDEF; - status = exitstatus; - } - evalskip = skip; - - return status; -} - - -int -falsecmd(int argc, char **argv) -{ - return 1; -} - - -int -truecmd(int argc, char **argv) -{ - return 0; -} - - -int -execcmd(int argc, char **argv) -{ - if (argc > 1) { - iflag = 0; /* exit on error */ - mflag = 0; - optschanged(); - shellexec(argv + 1, pathval(), 0); - } - return 0; -} - - -STATIC int -eprintlist(struct output *out, struct strlist *sp, int sep) -{ - while (sp) { - const char *p; - - p = " %s"; - p += (1 - sep); - sep |= 1; - outfmt(out, p, sp->text); - sp = sp->next; - } - - return sep; -} diff --git a/bin/dash/src/eval.h b/bin/dash/src/eval.h deleted file mode 100644 index 63e7d865..00000000 --- a/bin/dash/src/eval.h +++ /dev/null @@ -1,65 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)eval.h 8.2 (Berkeley) 5/4/95 - */ - -extern char *commandname; /* currently executing command */ -extern int exitstatus; /* exit status of last command */ -extern int back_exitstatus; /* exit status of backquoted command */ -extern int savestatus; /* exit status of last command outside traps */ - - -struct backcmd { /* result of evalbackcmd */ - int fd; /* file descriptor to read from */ - char *buf; /* buffer */ - int nleft; /* number of chars in buffer */ - struct job *jp; /* job structure for command */ -}; - -/* flags in argument to evaltree */ -#define EV_EXIT 01 /* exit after evaluating tree */ -#define EV_TESTED 02 /* exit status is checked; ignore -e flag */ - -int evalstring(char *, int); -union node; /* BLETCH for ansi C */ -int evaltree(union node *, int); -void evalbackcmd(union node *, struct backcmd *); - -extern int evalskip; - -/* reasons for skipping commands (see comment on breakcmd routine) */ -#define SKIPBREAK (1 << 0) -#define SKIPCONT (1 << 1) -#define SKIPFUNC (1 << 2) -#define SKIPFUNCDEF (1 << 3) diff --git a/bin/dash/src/exec.c b/bin/dash/src/exec.c deleted file mode 100644 index 87354d49..00000000 --- a/bin/dash/src/exec.c +++ /dev/null @@ -1,908 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include <fcntl.h> -#include <stdlib.h> -#ifdef HAVE_PATHS_H -#include <paths.h> -#endif - -/* - * When commands are first encountered, they are entered in a hash table. - * This ensures that a full path search will not have to be done for them - * on each invocation. - * - * We should investigate converting to a linear search, even though that - * would make the command name "hash" a misnomer. - */ - -#include "shell.h" -#include "main.h" -#include "nodes.h" -#include "parser.h" -#include "redir.h" -#include "eval.h" -#include "exec.h" -#include "builtins.h" -#include "var.h" -#include "options.h" -#include "output.h" -#include "syntax.h" -#include "memalloc.h" -#include "error.h" -#include "init.h" -#include "mystring.h" -#include "show.h" -#include "jobs.h" -#include "alias.h" -#include "system.h" - - -#define CMDTABLESIZE 31 /* should be prime */ -#define ARB 1 /* actual size determined at run time */ - - - -struct tblentry { - struct tblentry *next; /* next entry in hash chain */ - union param param; /* definition of builtin function */ - short cmdtype; /* index identifying command */ - char rehash; /* if set, cd done since entry created */ - char cmdname[ARB]; /* name of command */ -}; - - -STATIC struct tblentry *cmdtable[CMDTABLESIZE]; -STATIC int builtinloc = -1; /* index in path of %builtin, or -1 */ - - -STATIC void tryexec(char *, char **, char **); -STATIC void printentry(struct tblentry *); -STATIC void clearcmdentry(void); -STATIC struct tblentry *cmdlookup(const char *, int); -STATIC void delete_cmd_entry(void); -STATIC void addcmdentry(char *, struct cmdentry *); -STATIC int describe_command(struct output *, char *, const char *, int); - - -/* - * Exec a program. Never returns. If you change this routine, you may - * have to change the find_command routine as well. - */ - -void -shellexec(char **argv, const char *path, int idx) -{ - char *cmdname; - int e; - char **envp; - int exerrno; - - envp = environment(); - if (strchr(argv[0], '/') != NULL) { - tryexec(argv[0], argv, envp); - e = errno; - } else { - e = ENOENT; - while (padvance(&path, argv[0]) >= 0) { - cmdname = stackblock(); - if (--idx < 0 && pathopt == NULL) { - tryexec(cmdname, argv, envp); - if (errno != ENOENT && errno != ENOTDIR) - e = errno; - } - } - } - - /* Map to POSIX errors */ - switch (e) { - default: - exerrno = 126; - break; - case ELOOP: - case ENAMETOOLONG: - case ENOENT: - case ENOTDIR: - exerrno = 127; - break; - } - exitstatus = exerrno; - TRACE(("shellexec failed for %s, errno %d, suppressint %d\n", - argv[0], e, suppressint )); - exerror(EXEND, "%s: %s", argv[0], errmsg(e, E_EXEC)); - /* NOTREACHED */ -} - - -STATIC void -tryexec(char *cmd, char **argv, char **envp) -{ - char *const path_bshell = _PATH_BSHELL; - -repeat: -#ifdef SYSV - do { - execve(cmd, argv, envp); - } while (errno == EINTR); -#else - execve(cmd, argv, envp); -#endif - if (cmd != path_bshell && errno == ENOEXEC) { - *argv-- = cmd; - *argv = cmd = path_bshell; - goto repeat; - } -} - -static const char *legal_pathopt(const char *opt, const char *term, int magic) -{ - switch (magic) { - case 0: - opt = NULL; - break; - - case 1: - opt = prefix(opt, "builtin") ?: prefix(opt, "func"); - break; - - default: - opt += strcspn(opt, term); - break; - } - - if (opt && *opt == '%') - opt++; - - return opt; -} - -/* - * Do a path search. The variable path (passed by reference) should be - * set to the start of the path before the first call; padvance will update - * this value as it proceeds. Successive calls to padvance will return - * the possible path expansions in sequence. If an option (indicated by - * a percent sign) appears in the path entry then the global variable - * pathopt will be set to point to it; otherwise pathopt will be set to - * NULL. - * - * If magic is 0 then pathopt recognition will be disabled. If magic is - * 1 we shall recognise %builtin/%func. Otherwise we shall accept any - * pathopt. - */ - -const char *pathopt; - -int padvance_magic(const char **path, const char *name, int magic) -{ - const char *term = "%:"; - const char *lpathopt; - const char *p; - char *q; - const char *start; - size_t qlen; - size_t len; - - if (*path == NULL) - return -1; - - lpathopt = NULL; - start = *path; - - if (*start == '%' && (p = legal_pathopt(start + 1, term, magic))) { - lpathopt = start + 1; - start = p; - term = ":"; - } - - len = strcspn(start, term); - p = start + len; - - if (*p == '%') { - size_t extra = strchrnul(p, ':') - p; - - if (legal_pathopt(p + 1, term, magic)) - lpathopt = p + 1; - else - len += extra; - - p += extra; - } - - pathopt = lpathopt; - *path = *p == ':' ? p + 1 : NULL; - - /* "2" is for '/' and '\0' */ - qlen = len + strlen(name) + 2; - q = growstackto(qlen); - - if (likely(len)) { - q = mempcpy(q, start, len); - *q++ = '/'; - } - strcpy(q, name); - - return qlen; -} - - - -/*** Command hashing code ***/ - - -int -hashcmd(int argc, char **argv) -{ - struct tblentry **pp; - struct tblentry *cmdp; - int c; - struct cmdentry entry; - char *name; - - while ((c = nextopt("r")) != '\0') { - clearcmdentry(); - return 0; - } - if (*argptr == NULL) { - for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) { - for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { - if (cmdp->cmdtype == CMDNORMAL) - printentry(cmdp); - } - } - return 0; - } - c = 0; - while ((name = *argptr) != NULL) { - if ((cmdp = cmdlookup(name, 0)) && - (cmdp->cmdtype == CMDNORMAL || - (cmdp->cmdtype == CMDBUILTIN && - !(cmdp->param.cmd->flags & BUILTIN_REGULAR) && - builtinloc > 0))) - delete_cmd_entry(); - find_command(name, &entry, DO_ERR, pathval()); - if (entry.cmdtype == CMDUNKNOWN) - c = 1; - argptr++; - } - return c; -} - - -STATIC void -printentry(struct tblentry *cmdp) -{ - int idx; - const char *path; - char *name; - - idx = cmdp->param.index; - path = pathval(); - do { - padvance(&path, cmdp->cmdname); - } while (--idx >= 0); - name = stackblock(); - out1str(name); - out1fmt(snlfmt, cmdp->rehash ? "*" : nullstr); -} - - - -/* - * Resolve a command name. If you change this routine, you may have to - * change the shellexec routine as well. - */ - -void -find_command(char *name, struct cmdentry *entry, int act, const char *path) -{ - struct tblentry *cmdp; - int idx; - int prev; - char *fullname; - struct stat64 statb; - int e; - int updatetbl; - struct builtincmd *bcmd; - int len; - - /* If name contains a slash, don't use PATH or hash table */ - if (strchr(name, '/') != NULL) { - entry->u.index = -1; - if (act & DO_ABS) { - while (stat64(name, &statb) < 0) { -#ifdef SYSV - if (errno == EINTR) - continue; -#endif - entry->cmdtype = CMDUNKNOWN; - return; - } - } - entry->cmdtype = CMDNORMAL; - return; - } - - updatetbl = (path == pathval()); - if (!updatetbl) - act |= DO_ALTPATH; - - /* If name is in the table, check answer will be ok */ - if ((cmdp = cmdlookup(name, 0)) != NULL) { - int bit; - - switch (cmdp->cmdtype) { - default: -#if DEBUG - abort(); -#endif - case CMDNORMAL: - bit = DO_ALTPATH | DO_REGBLTIN; - break; - case CMDFUNCTION: - bit = DO_NOFUNC; - break; - case CMDBUILTIN: - bit = cmdp->param.cmd->flags & BUILTIN_REGULAR ? - 0 : DO_REGBLTIN; - break; - } - if (act & bit) { - if (act & bit & DO_REGBLTIN) - goto fail; - - updatetbl = 0; - cmdp = NULL; - } else if (cmdp->rehash == 0) - /* if not invalidated by cd, we're done */ - goto success; - } - - /* If %builtin not in path, check for builtin next */ - bcmd = find_builtin(name); - if (bcmd && ((bcmd->flags & BUILTIN_REGULAR) | (act & DO_ALTPATH) | - (builtinloc <= 0))) - goto builtin_success; - - if (act & DO_REGBLTIN) - goto fail; - - /* We have to search path. */ - prev = -1; /* where to start */ - if (cmdp && cmdp->rehash) { /* doing a rehash */ - if (cmdp->cmdtype == CMDBUILTIN) - prev = builtinloc; - else - prev = cmdp->param.index; - } - - e = ENOENT; - idx = -1; -loop: - while ((len = padvance(&path, name)) >= 0) { - const char *lpathopt = pathopt; - - fullname = stackblock(); - idx++; - if (lpathopt) { - if (*lpathopt == 'b') { - if (bcmd) - goto builtin_success; - continue; - } else if (!(act & DO_NOFUNC)) { - /* handled below */ - } else { - /* ignore unimplemented options */ - continue; - } - } - /* if rehash, don't redo absolute path names */ - if (fullname[0] == '/' && idx <= prev) { - if (idx < prev) - continue; - TRACE(("searchexec \"%s\": no change\n", name)); - goto success; - } - while (stat64(fullname, &statb) < 0) { -#ifdef SYSV - if (errno == EINTR) - continue; -#endif - if (errno != ENOENT && errno != ENOTDIR) - e = errno; - goto loop; - } - e = EACCES; /* if we fail, this will be the error */ - if (!S_ISREG(statb.st_mode)) - continue; - if (lpathopt) { /* this is a %func directory */ - stalloc(len); - readcmdfile(fullname); - if ((cmdp = cmdlookup(name, 0)) == NULL || - cmdp->cmdtype != CMDFUNCTION) - sh_error("%s not defined in %s", name, - fullname); - stunalloc(fullname); - goto success; - } -#ifdef notdef - /* XXX this code stops root executing stuff, and is buggy - if you need a group from the group list. */ - if (statb.st_uid == geteuid()) { - if ((statb.st_mode & 0100) == 0) - goto loop; - } else if (statb.st_gid == getegid()) { - if ((statb.st_mode & 010) == 0) - goto loop; - } else { - if ((statb.st_mode & 01) == 0) - goto loop; - } -#endif - TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname)); - if (!updatetbl) { - entry->cmdtype = CMDNORMAL; - entry->u.index = idx; - return; - } - INTOFF; - cmdp = cmdlookup(name, 1); - cmdp->cmdtype = CMDNORMAL; - cmdp->param.index = idx; - INTON; - goto success; - } - - /* We failed. If there was an entry for this command, delete it */ - if (cmdp && updatetbl) - delete_cmd_entry(); - if (act & DO_ERR) - sh_warnx("%s: %s", name, errmsg(e, E_EXEC)); -fail: - entry->cmdtype = CMDUNKNOWN; - return; - -builtin_success: - if (!updatetbl) { - entry->cmdtype = CMDBUILTIN; - entry->u.cmd = bcmd; - return; - } - INTOFF; - cmdp = cmdlookup(name, 1); - cmdp->cmdtype = CMDBUILTIN; - cmdp->param.cmd = bcmd; - INTON; -success: - cmdp->rehash = 0; - entry->cmdtype = cmdp->cmdtype; - entry->u = cmdp->param; -} - - - -/* - * Search the table of builtin commands. - */ - -struct builtincmd * -find_builtin(const char *name) -{ - struct builtincmd *bp; - - bp = bsearch( - &name, builtincmd, NUMBUILTINS, sizeof(struct builtincmd), - pstrcmp - ); - return bp; -} - - - -/* - * Called when a cd is done. Marks all commands so the next time they - * are executed they will be rehashed. - */ - -void -hashcd(void) -{ - struct tblentry **pp; - struct tblentry *cmdp; - - for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) { - for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { - if (cmdp->cmdtype == CMDNORMAL || ( - cmdp->cmdtype == CMDBUILTIN && - !(cmdp->param.cmd->flags & BUILTIN_REGULAR) && - builtinloc > 0 - )) - cmdp->rehash = 1; - } - } -} - - - -/* - * Fix command hash table when PATH changed. - * Called before PATH is changed. The argument is the new value of PATH; - * pathval() still returns the old value at this point. - * Called with interrupts off. - */ - -void -changepath(const char *newval) -{ - const char *new; - int idx; - int bltin; - - new = newval; - idx = 0; - bltin = -1; - for (;;) { - if (*new == '%' && prefix(new + 1, "builtin")) { - bltin = idx; - break; - } - new = strchr(new, ':'); - if (!new) - break; - idx++; - new++; - } - builtinloc = bltin; - clearcmdentry(); -} - - -/* - * Clear out command entries. The argument specifies the first entry in - * PATH which has changed. - */ - -STATIC void -clearcmdentry(void) -{ - struct tblentry **tblp; - struct tblentry **pp; - struct tblentry *cmdp; - - INTOFF; - for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) { - pp = tblp; - while ((cmdp = *pp) != NULL) { - if (cmdp->cmdtype == CMDNORMAL || - (cmdp->cmdtype == CMDBUILTIN && - !(cmdp->param.cmd->flags & BUILTIN_REGULAR) && - builtinloc > 0)) { - *pp = cmdp->next; - ckfree(cmdp); - } else { - pp = &cmdp->next; - } - } - } - INTON; -} - - - -/* - * Locate a command in the command hash table. If "add" is nonzero, - * add the command to the table if it is not already present. The - * variable "lastcmdentry" is set to point to the address of the link - * pointing to the entry, so that delete_cmd_entry can delete the - * entry. - * - * Interrupts must be off if called with add != 0. - */ - -struct tblentry **lastcmdentry; - - -STATIC struct tblentry * -cmdlookup(const char *name, int add) -{ - unsigned int hashval; - const char *p; - struct tblentry *cmdp; - struct tblentry **pp; - - p = name; - hashval = (unsigned char)*p << 4; - while (*p) - hashval += (unsigned char)*p++; - hashval &= 0x7FFF; - pp = &cmdtable[hashval % CMDTABLESIZE]; - for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { - if (equal(cmdp->cmdname, name)) - break; - pp = &cmdp->next; - } - if (add && cmdp == NULL) { - cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB - + strlen(name) + 1); - cmdp->next = NULL; - cmdp->cmdtype = CMDUNKNOWN; - strcpy(cmdp->cmdname, name); - } - lastcmdentry = pp; - return cmdp; -} - -/* - * Delete the command entry returned on the last lookup. - */ - -STATIC void -delete_cmd_entry(void) -{ - struct tblentry *cmdp; - - INTOFF; - cmdp = *lastcmdentry; - *lastcmdentry = cmdp->next; - if (cmdp->cmdtype == CMDFUNCTION) - freefunc(cmdp->param.func); - ckfree(cmdp); - INTON; -} - - - -#ifdef notdef -void -getcmdentry(char *name, struct cmdentry *entry) -{ - struct tblentry *cmdp = cmdlookup(name, 0); - - if (cmdp) { - entry->u = cmdp->param; - entry->cmdtype = cmdp->cmdtype; - } else { - entry->cmdtype = CMDUNKNOWN; - entry->u.index = 0; - } -} -#endif - - -/* - * Add a new command entry, replacing any existing command entry for - * the same name - except special builtins. - */ - -STATIC void -addcmdentry(char *name, struct cmdentry *entry) -{ - struct tblentry *cmdp; - - cmdp = cmdlookup(name, 1); - if (cmdp->cmdtype == CMDFUNCTION) { - freefunc(cmdp->param.func); - } - cmdp->cmdtype = entry->cmdtype; - cmdp->param = entry->u; - cmdp->rehash = 0; -} - - -/* - * Define a shell function. - */ - -void -defun(union node *func) -{ - struct cmdentry entry; - - INTOFF; - entry.cmdtype = CMDFUNCTION; - entry.u.func = copyfunc(func); - addcmdentry(func->ndefun.text, &entry); - INTON; -} - - -/* - * Delete a function if it exists. - */ - -void -unsetfunc(const char *name) -{ - struct tblentry *cmdp; - - if ((cmdp = cmdlookup(name, 0)) != NULL && - cmdp->cmdtype == CMDFUNCTION) - delete_cmd_entry(); -} - -/* - * Locate and print what a word is... - */ - -int -typecmd(int argc, char **argv) -{ - int i; - int err = 0; - - for (i = 1; i < argc; i++) { - err |= describe_command(out1, argv[i], NULL, 1); - } - return err; -} - -STATIC int -describe_command(out, command, path, verbose) - struct output *out; - char *command; - const char *path; - int verbose; -{ - struct cmdentry entry; - struct tblentry *cmdp; - const struct alias *ap; - - if (verbose) { - outstr(command, out); - } - - /* First look at the keywords */ - if (findkwd(command)) { - outstr(verbose ? " is a shell keyword" : command, out); - goto out; - } - - /* Then look at the aliases */ - if ((ap = lookupalias(command, 0)) != NULL) { - if (verbose) { - outfmt(out, " is an alias for %s", ap->val); - } else { - outstr("alias ", out); - printalias(ap); - return 0; - } - goto out; - } - - /* Then if the standard search path is used, check if it is - * a tracked alias. - */ - if (path == NULL) { - path = pathval(); - cmdp = cmdlookup(command, 0); - } else { - cmdp = NULL; - } - - if (cmdp != NULL) { - entry.cmdtype = cmdp->cmdtype; - entry.u = cmdp->param; - } else { - /* Finally use brute force */ - find_command(command, &entry, DO_ABS, path); - } - - switch (entry.cmdtype) { - case CMDNORMAL: { - int j = entry.u.index; - char *p; - if (j == -1) { - p = command; - } else { - do { - padvance(&path, command); - } while (--j >= 0); - p = stackblock(); - } - if (verbose) { - outfmt( - out, " is%s %s", - cmdp ? " a tracked alias for" : nullstr, p - ); - } else { - outstr(p, out); - } - break; - } - - case CMDFUNCTION: - if (verbose) { - outstr(" is a shell function", out); - } else { - outstr(command, out); - } - break; - - case CMDBUILTIN: - if (verbose) { - outfmt( - out, " is a %sshell builtin", - entry.u.cmd->flags & BUILTIN_SPECIAL ? - "special " : nullstr - ); - } else { - outstr(command, out); - } - break; - - default: - if (verbose) { - outstr(": not found\n", out); - } - return 127; - } - -out: - outc('\n', out); - return 0; -} - -int -commandcmd(argc, argv) - int argc; - char **argv; -{ - char *cmd; - int c; - enum { - VERIFY_BRIEF = 1, - VERIFY_VERBOSE = 2, - } verify = 0; - const char *path = NULL; - - while ((c = nextopt("pvV")) != '\0') - if (c == 'V') - verify |= VERIFY_VERBOSE; - else if (c == 'v') - verify |= VERIFY_BRIEF; -#ifdef DEBUG - else if (c != 'p') - abort(); -#endif - else - path = defpath; - - cmd = *argptr; - if (verify && cmd) - return describe_command(out1, cmd, path, verify - VERIFY_BRIEF); - - return 0; -} diff --git a/bin/dash/src/exec.h b/bin/dash/src/exec.h deleted file mode 100644 index 423b07e6..00000000 --- a/bin/dash/src/exec.h +++ /dev/null @@ -1,84 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)exec.h 8.3 (Berkeley) 6/8/95 - */ - -/* values of cmdtype */ -#define CMDUNKNOWN -1 /* no entry in table for command */ -#define CMDNORMAL 0 /* command is an executable program */ -#define CMDFUNCTION 1 /* command is a shell function */ -#define CMDBUILTIN 2 /* command is a shell builtin */ - - -struct cmdentry { - int cmdtype; - union param { - int index; - const struct builtincmd *cmd; - struct funcnode *func; - } u; -}; - - -/* action to find_command() */ -#define DO_ERR 0x01 /* prints errors */ -#define DO_ABS 0x02 /* checks absolute paths */ -#define DO_NOFUNC 0x04 /* don't return shell functions, for command */ -#define DO_ALTPATH 0x08 /* using alternate path */ -#define DO_REGBLTIN 0x10 /* regular built-ins and functions only */ - -union node; - -extern const char *pathopt; /* set by padvance */ - -void shellexec(char **, const char *, int) - __attribute__((__noreturn__)); -int padvance_magic(const char **path, const char *name, int magic); -int hashcmd(int, char **); -void find_command(char *, struct cmdentry *, int, const char *); -struct builtincmd *find_builtin(const char *); -void hashcd(void); -void changepath(const char *); -#ifdef notdef -void getcmdentry(char *, struct cmdentry *); -#endif -void defun(union node *); -void unsetfunc(const char *); -int typecmd(int, char **); -int commandcmd(int, char **); - -static inline int padvance(const char **path, const char *name) -{ - return padvance_magic(path, name, 1); -} diff --git a/bin/dash/src/expand.c b/bin/dash/src/expand.c deleted file mode 100644 index 1730670e..00000000 --- a/bin/dash/src/expand.c +++ /dev/null @@ -1,1753 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/types.h> -#include <sys/time.h> -#include <sys/stat.h> -#include <dirent.h> -#include <unistd.h> -#ifdef HAVE_GETPWNAM -#include <pwd.h> -#endif -#include <stdlib.h> -#include <stdio.h> -#include <inttypes.h> -#include <limits.h> -#include <string.h> -#ifdef HAVE_FNMATCH -#include <fnmatch.h> -#endif -#ifdef HAVE_GLOB -#include <glob.h> -#endif -#include <ctype.h> -#include <stdbool.h> - -/* - * Routines to expand arguments to commands. We have to deal with - * backquotes, shell variables, and file metacharacters. - */ - -#include "shell.h" -#include "main.h" -#include "nodes.h" -#include "eval.h" -#include "expand.h" -#include "syntax.h" -#include "parser.h" -#include "jobs.h" -#include "options.h" -#include "var.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "mystring.h" -#include "show.h" -#include "system.h" - -/* - * _rmescape() flags - */ -#define RMESCAPE_ALLOC 0x1 /* Allocate a new string */ -#define RMESCAPE_GLOB 0x2 /* Add backslashes for glob */ -#define RMESCAPE_GROW 0x8 /* Grow strings instead of stalloc */ -#define RMESCAPE_HEAP 0x10 /* Malloc strings instead of stalloc */ - -/* Add CTLESC when necessary. */ -#define QUOTES_ESC (EXP_FULL | EXP_CASE) - -/* - * Structure specifying which parts of the string should be searched - * for IFS characters. - */ - -struct ifsregion { - struct ifsregion *next; /* next region in list */ - int begoff; /* offset of start of region */ - int endoff; /* offset of end of region */ - int nulonly; /* search for nul bytes only */ -}; - -/* output of current string */ -static char *expdest; -/* list of back quote expressions */ -static struct nodelist *argbackq; -/* first struct in list of ifs regions */ -static struct ifsregion ifsfirst; -/* last struct in list */ -static struct ifsregion *ifslastp; -/* holds expanded arg list */ -static struct arglist exparg; - -static char *argstr(char *p, int flag); -static char *exptilde(char *startp, int flag); -static char *expari(char *start, int flag); -STATIC void expbackq(union node *, int); -STATIC char *evalvar(char *, int); -static size_t strtodest(const char *p, int flags); -static size_t memtodest(const char *p, size_t len, int flags); -STATIC ssize_t varvalue(char *, int, int, int); -STATIC void expandmeta(struct strlist *); -#ifdef HAVE_GLOB -STATIC void addglob(const glob_t *); -#else -STATIC void expmeta(char *, unsigned, unsigned); -STATIC struct strlist *expsort(struct strlist *); -STATIC struct strlist *msort(struct strlist *, int); -#endif -STATIC void addfname(char *); -STATIC int patmatch(char *, const char *); -#ifndef HAVE_FNMATCH -STATIC int pmatch(const char *, const char *); -#else -#define pmatch(a, b) !fnmatch((a), (b), 0) -#endif -static size_t cvtnum(intmax_t num, int flags); -STATIC size_t esclen(const char *, const char *); -STATIC char *scanleft(char *, char *, char *, char *, int, int); -STATIC char *scanright(char *, char *, char *, char *, int, int); -STATIC void varunset(const char *, const char *, const char *, int) - __attribute__((__noreturn__)); - - -/* - * Prepare a pattern for a glob(3) call. - * - * Returns an stalloced string. - */ - -STATIC inline char * -preglob(const char *pattern, int flag) { - flag |= RMESCAPE_GLOB; - return _rmescapes((char *)pattern, flag); -} - - -STATIC size_t -esclen(const char *start, const char *p) { - size_t esc = 0; - - while (p > start && *--p == (char)CTLESC) { - esc++; - } - return esc; -} - - -static inline const char *getpwhome(const char *name) -{ -#ifdef HAVE_GETPWNAM - struct passwd *pw = getpwnam(name); - return pw ? pw->pw_dir : 0; -#else - return 0; -#endif -} - - -/* - * Perform variable substitution and command substitution on an argument, - * placing the resulting list of arguments in arglist. If EXP_FULL is true, - * perform splitting and file name expansion. When arglist is NULL, perform - * here document expansion. - */ - -void -expandarg(union node *arg, struct arglist *arglist, int flag) -{ - struct strlist *sp; - char *p; - - argbackq = arg->narg.backquote; - STARTSTACKSTR(expdest); - argstr(arg->narg.text, flag); - if (arglist == NULL) { - /* here document expanded */ - goto out; - } - p = grabstackstr(expdest); - exparg.lastp = &exparg.list; - /* - * TODO - EXP_REDIR - */ - if (flag & EXP_FULL) { - ifsbreakup(p, -1, &exparg); - *exparg.lastp = NULL; - exparg.lastp = &exparg.list; - expandmeta(exparg.list); - } else { - sp = (struct strlist *)stalloc(sizeof (struct strlist)); - sp->text = p; - *exparg.lastp = sp; - exparg.lastp = &sp->next; - } - *exparg.lastp = NULL; - if (exparg.list) { - *arglist->lastp = exparg.list; - arglist->lastp = exparg.lastp; - } - -out: - ifsfree(); -} - - - -/* - * Perform variable and command substitution. If EXP_FULL is set, output CTLESC - * characters to allow for further processing. Otherwise treat - * $@ like $* since no splitting will be performed. - */ - -static char *argstr(char *p, int flag) -{ - static const char spclchars[] = { - '=', - ':', - CTLQUOTEMARK, - CTLENDVAR, - CTLESC, - CTLVAR, - CTLBACKQ, - CTLARI, - CTLENDARI, - 0 - }; - const char *reject = spclchars; - int c; - int breakall = (flag & (EXP_WORD | EXP_QUOTED)) == EXP_WORD; - int inquotes; - size_t length; - int startloc; - - reject += !!(flag & EXP_VARTILDE2); - reject += flag & EXP_VARTILDE ? 0 : 2; - inquotes = 0; - length = 0; - if (flag & EXP_TILDE) { - flag &= ~EXP_TILDE; -tilde: - if (*p == '~') - p = exptilde(p, flag); - } -start: - startloc = expdest - (char *)stackblock(); - for (;;) { - int end; - - length += strcspn(p + length, reject); - end = 0; - c = (signed char)p[length]; - if (!(c & 0x80) || c == CTLENDARI || c == CTLENDVAR) { - /* - * c == '=' || c == ':' || c == '\0' || - * c == CTLENDARI || c == CTLENDVAR - */ - length++; - /* c == '\0' || c == CTLENDARI || c == CTLENDVAR */ - end = !!((c - 1) & 0x80); - } - if (length > 0 && !(flag & EXP_DISCARD)) { - int newloc; - char *q; - - q = stnputs(p, length, expdest); - q[-1] &= end - 1; - expdest = q - (flag & EXP_WORD ? end : 0); - newloc = q - (char *)stackblock() - end; - if (breakall && !inquotes && newloc > startloc) { - recordregion(startloc, newloc, 0); - } - startloc = newloc; - } - p += length + 1; - length = 0; - - if (end) - break; - - switch (c) { - case '=': - flag |= EXP_VARTILDE2; - reject++; - /* fall through */ - case ':': - /* - * sort of a hack - expand tildes in variable - * assignments (after the first '=' and after ':'s). - */ - if (*--p == '~') { - goto tilde; - } - continue; - case CTLQUOTEMARK: - /* "$@" syntax adherence hack */ - if (!inquotes && !memcmp(p, dolatstr + 1, - DOLATSTRLEN - 1)) { - p = evalvar(p + 1, flag | EXP_QUOTED) + 1; - goto start; - } - inquotes ^= EXP_QUOTED; -addquote: - if (flag & QUOTES_ESC) { - p--; - length++; - startloc++; - } - break; - case CTLESC: - startloc++; - length++; - goto addquote; - case CTLVAR: - p = evalvar(p, flag | inquotes); - goto start; - case CTLBACKQ: - expbackq(argbackq->n, flag | inquotes); - goto start; - case CTLARI: - p = expari(p, flag | inquotes); - goto start; - } - } - return p - 1; -} - -static char *exptilde(char *startp, int flag) -{ - signed char c; - char *name; - const char *home; - char *p; - - p = startp; - name = p + 1; - - while ((c = *++p) != '\0') { - switch(c) { - case CTLESC: - return (startp); - case CTLQUOTEMARK: - return (startp); - case ':': - if (flag & EXP_VARTILDE) - goto done; - break; - case '/': - case CTLENDVAR: - goto done; - } - } -done: - if (flag & EXP_DISCARD) - goto out; - *p = '\0'; - if (*name == '\0') { - home = lookupvar(homestr); - } else { - home = getpwhome(name); - } - *p = c; - if (!home) - goto lose; - strtodest(home, flag | EXP_QUOTED); -out: - return (p); -lose: - return (startp); -} - - -void -removerecordregions(int endoff) -{ - if (ifslastp == NULL) - return; - - if (ifsfirst.endoff > endoff) { - while (ifsfirst.next != NULL) { - struct ifsregion *ifsp; - INTOFF; - ifsp = ifsfirst.next->next; - ckfree(ifsfirst.next); - ifsfirst.next = ifsp; - INTON; - } - if (ifsfirst.begoff > endoff) - ifslastp = NULL; - else { - ifslastp = &ifsfirst; - ifsfirst.endoff = endoff; - } - return; - } - - ifslastp = &ifsfirst; - while (ifslastp->next && ifslastp->next->begoff < endoff) - ifslastp=ifslastp->next; - while (ifslastp->next != NULL) { - struct ifsregion *ifsp; - INTOFF; - ifsp = ifslastp->next->next; - ckfree(ifslastp->next); - ifslastp->next = ifsp; - INTON; - } - if (ifslastp->endoff > endoff) - ifslastp->endoff = endoff; -} - - -/* - * Expand arithmetic expression. Backup to start of expression, - * evaluate, place result in (backed up) result, adjust string position. - */ -static char *expari(char *start, int flag) -{ - struct stackmark sm; - int begoff; - int endoff; - int len; - intmax_t result; - char *p; - - p = stackblock(); - begoff = expdest - p; - p = argstr(start, flag & EXP_DISCARD); - - if (flag & EXP_DISCARD) - goto out; - - start = stackblock(); - endoff = expdest - start; - start += begoff; - STADJUST(start - expdest, expdest); - - removerecordregions(begoff); - - if (likely(flag & QUOTES_ESC)) - rmescapes(start); - - pushstackmark(&sm, endoff); - result = arith(start); - popstackmark(&sm); - - len = cvtnum(result, flag); - - if (likely(!(flag & EXP_QUOTED))) - recordregion(begoff, begoff + len, 0); - -out: - return p; -} - - -/* - * Expand stuff in backwards quotes. - */ - -STATIC void -expbackq(union node *cmd, int flag) -{ - struct backcmd in; - int i; - char buf[128]; - char *p; - char *dest; - int startloc; - struct stackmark smark; - - if (flag & EXP_DISCARD) - goto out; - - INTOFF; - startloc = expdest - (char *)stackblock(); - pushstackmark(&smark, startloc); - evalbackcmd(cmd, (struct backcmd *) &in); - popstackmark(&smark); - - p = in.buf; - i = in.nleft; - if (i == 0) - goto read; - for (;;) { - memtodest(p, i, flag); -read: - if (in.fd < 0) - break; - do { - i = read(in.fd, buf, sizeof buf); - } while (i < 0 && errno == EINTR); - TRACE(("expbackq: read returns %d\n", i)); - if (i <= 0) - break; - p = buf; - } - - if (in.buf) - ckfree(in.buf); - if (in.fd >= 0) { - close(in.fd); - back_exitstatus = waitforjob(in.jp); - } - INTON; - - /* Eat all trailing newlines */ - dest = expdest; - for (; dest > ((char *)stackblock() + startloc) && dest[-1] == '\n';) - STUNPUTC(dest); - expdest = dest; - - if (!(flag & EXP_QUOTED)) - recordregion(startloc, dest - (char *)stackblock(), 0); - TRACE(("evalbackq: size=%d: \"%.*s\"\n", - (dest - (char *)stackblock()) - startloc, - (dest - (char *)stackblock()) - startloc, - stackblock() + startloc)); - -out: - argbackq = argbackq->next; -} - - -STATIC char * -scanleft( - char *startp, char *rmesc, char *rmescend, char *str, int quotes, - int zero -) { - char *loc; - char *loc2; - char c; - - loc = startp; - loc2 = rmesc; - do { - int match; - const char *s = loc2; - c = *loc2; - if (zero) { - *loc2 = '\0'; - s = rmesc; - } - match = pmatch(str, s); - *loc2 = c; - if (match) - return loc; - if (quotes && *loc == (char)CTLESC) - loc++; - loc++; - loc2++; - } while (c); - return 0; -} - - -STATIC char * -scanright( - char *startp, char *rmesc, char *rmescend, char *str, int quotes, - int zero -) { - int esc = 0; - char *loc; - char *loc2; - - for (loc = str - 1, loc2 = rmescend; loc >= startp; loc2--) { - int match; - char c = *loc2; - const char *s = loc2; - if (zero) { - *loc2 = '\0'; - s = rmesc; - } - match = pmatch(str, s); - *loc2 = c; - if (match) - return loc; - loc--; - if (quotes) { - if (--esc < 0) { - esc = esclen(startp, loc); - } - if (esc % 2) { - esc--; - loc--; - } - } - } - return 0; -} - -static char *subevalvar(char *start, char *str, int strloc, int startloc, - int varflags, int flag) -{ - int subtype = varflags & VSTYPE; - int quotes = flag & QUOTES_ESC; - char *startp; - char *loc; - long amount; - char *rmesc, *rmescend; - int zero; - char *(*scan)(char *, char *, char *, char *, int , int); - char *p; - - p = argstr(start, (flag & EXP_DISCARD) | EXP_TILDE | - (str ? 0 : EXP_CASE)); - if (flag & EXP_DISCARD) - return p; - - startp = stackblock() + startloc; - - switch (subtype) { - case VSASSIGN: - setvar(str, startp, 0); - - loc = startp; - goto out; - - case VSQUESTION: - varunset(start, str, startp, varflags); - /* NOTREACHED */ - } - - subtype -= VSTRIMRIGHT; -#ifdef DEBUG - if (subtype < 0 || subtype > 3) - abort(); -#endif - - rmesc = startp; - rmescend = stackblock() + strloc; - if (quotes) { - rmesc = _rmescapes(startp, RMESCAPE_ALLOC | RMESCAPE_GROW); - if (rmesc != startp) { - rmescend = expdest; - startp = stackblock() + startloc; - } - } - rmescend--; - str = stackblock() + strloc; - preglob(str, 0); - - /* zero = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX */ - zero = subtype >> 1; - /* VSTRIMLEFT/VSTRIMRIGHTMAX -> scanleft */ - scan = (subtype & 1) ^ zero ? scanleft : scanright; - - loc = scan(startp, rmesc, rmescend, str, quotes, zero); - if (loc) { - if (zero) { - memmove(startp, loc, str - loc); - loc = startp + (str - loc) - 1; - } - *loc = '\0'; - } else - loc = str - 1; - -out: - amount = loc - expdest; - STADJUST(amount, expdest); - - /* Remove any recorded regions beyond start of variable */ - removerecordregions(startloc); - - return p; -} - - -/* - * Expand a variable, and return a pointer to the next character in the - * input string. - */ -STATIC char * -evalvar(char *p, int flag) -{ - int subtype; - int varflags; - char *var; - int patloc; - int startloc; - ssize_t varlen; - int discard; - int quoted; - - varflags = *p++; - subtype = varflags & VSTYPE; - - quoted = flag & EXP_QUOTED; - var = p; - startloc = expdest - (char *)stackblock(); - p = strchr(p, '=') + 1; - -again: - varlen = varvalue(var, varflags, flag, quoted); - if (varflags & VSNUL) - varlen--; - - discard = varlen < 0 ? EXP_DISCARD : 0; - - switch (subtype) { - case VSPLUS: - discard ^= EXP_DISCARD; - /* fall through */ - - case 0: - case VSMINUS: - p = argstr(p, flag | EXP_TILDE | EXP_WORD | - (discard ^ EXP_DISCARD)); - goto record; - - case VSASSIGN: - case VSQUESTION: - p = subevalvar(p, var, 0, startloc, varflags, - (flag & ~QUOTES_ESC) | - (discard ^ EXP_DISCARD)); - - if ((flag | ~discard) & EXP_DISCARD) - goto record; - - varflags &= ~VSNUL; - subtype = VSNORMAL; - goto again; - } - - if ((discard & ~flag) && uflag) - varunset(p, var, 0, 0); - - if (subtype == VSLENGTH) { - p++; - if (flag & EXP_DISCARD) - return p; - cvtnum(varlen > 0 ? varlen : 0, flag); - goto really_record; - } - - if (subtype == VSNORMAL) - goto record; - -#ifdef DEBUG - switch (subtype) { - case VSTRIMLEFT: - case VSTRIMLEFTMAX: - case VSTRIMRIGHT: - case VSTRIMRIGHTMAX: - break; - default: - abort(); - } -#endif - - flag |= discard; - if (!(flag & EXP_DISCARD)) { - /* - * Terminate the string and start recording the pattern - * right after it - */ - STPUTC('\0', expdest); - } - - patloc = expdest - (char *)stackblock(); - p = subevalvar(p, NULL, patloc, startloc, varflags, flag); - -record: - if ((flag | discard) & EXP_DISCARD) - return p; - -really_record: - if (quoted) { - quoted = *var == '@' && shellparam.nparam; - if (!quoted) - return p; - } - recordregion(startloc, expdest - (char *)stackblock(), quoted); - return p; -} - - -/* - * Put a string on the stack. - */ - -static size_t memtodest(const char *p, size_t len, int flags) -{ - const char *syntax = flags & EXP_QUOTED ? DQSYNTAX : BASESYNTAX; - char *q; - char *s; - - if (unlikely(!len)) - return 0; - - q = makestrspace(len * 2, expdest); - s = q; - - do { - int c = (signed char)*p++; - if (c) { - if ((flags & QUOTES_ESC) && - ((syntax[c] == CCTL) || - (flags & EXP_QUOTED && syntax[c] == CBACK))) - USTPUTC(CTLESC, q); - } else if (!(flags & EXP_KEEPNUL)) - continue; - USTPUTC(c, q); - } while (--len); - - expdest = q; - return q - s; -} - - -static size_t strtodest(const char *p, int flags) -{ - size_t len = strlen(p); - memtodest(p, len, flags); - return len; -} - - - -/* - * Add the value of a specialized variable to the stack string. - */ - -STATIC ssize_t -varvalue(char *name, int varflags, int flags, int quoted) -{ - int num; - char *p; - int i; - int sep; - char sepc; - char **ap; - int subtype = varflags & VSTYPE; - int discard = (subtype == VSPLUS || subtype == VSLENGTH) | - (flags & EXP_DISCARD); - ssize_t len = 0; - char c; - - if (!subtype) { - if (discard) - return -1; - - sh_error("Bad substitution"); - } - - flags |= EXP_KEEPNUL; - flags &= discard ? ~QUOTES_ESC : ~0; - sep = (flags & EXP_FULL) << CHAR_BIT; - - switch (*name) { - case '$': - num = rootpid; - goto numvar; - case '?': - num = exitstatus; - goto numvar; - case '#': - num = shellparam.nparam; - goto numvar; - case '!': - num = backgndpid; - if (num == 0) - return -1; -numvar: - len = cvtnum(num, flags); - break; - case '-': - p = makestrspace(NOPTS, expdest); - for (i = NOPTS - 1; i >= 0; i--) { - if (optlist[i] && optletters[i]) { - USTPUTC(optletters[i], p); - len++; - } - } - expdest = p; - break; - case '@': - if (quoted && sep) - goto param; - /* fall through */ - case '*': - /* We will set c to 0 or ~0 depending on whether - * we're doing field splitting. We won't do field - * splitting if either we're quoted or sep is zero. - * - * Instead of testing (quoted || !sep) the following - * trick optimises away any branches by using the - * fact that EXP_QUOTED (which is the only bit that - * can be set in quoted) is the same as EXP_FULL << - * CHAR_BIT (which is the only bit that can be set - * in sep). - */ -#if EXP_QUOTED >> CHAR_BIT != EXP_FULL -#error The following two lines expect EXP_QUOTED == EXP_FULL << CHAR_BIT -#endif - c = !((quoted | ~sep) & EXP_QUOTED) - 1; - sep &= ~quoted; - sep |= ifsset() ? (unsigned char)(c & ifsval()[0]) : ' '; -param: - sepc = sep; - if (!(ap = shellparam.p)) - return -1; - while ((p = *ap++)) { - len += strtodest(p, flags); - - if (*ap && sep) { - len++; - memtodest(&sepc, 1, flags); - } - } - break; - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': - num = atoi(name); - if (num < 0 || num > shellparam.nparam) - return -1; - p = num ? shellparam.p[num - 1] : arg0; - goto value; - default: - p = lookupvar(name); -value: - if (!p) - return -1; - - len = strtodest(p, flags); - break; - } - - if (discard) - STADJUST(-len, expdest); - - return len; -} - - - -/* - * Record the fact that we have to scan this region of the - * string for IFS characters. - */ - -void -recordregion(int start, int end, int nulonly) -{ - struct ifsregion *ifsp; - - if (ifslastp == NULL) { - ifsp = &ifsfirst; - } else { - INTOFF; - ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion)); - ifsp->next = NULL; - ifslastp->next = ifsp; - INTON; - } - ifslastp = ifsp; - ifslastp->begoff = start; - ifslastp->endoff = end; - ifslastp->nulonly = nulonly; -} - - - -/* - * Break the argument string into pieces based upon IFS and add the - * strings to the argument list. The regions of the string to be - * searched for IFS characters have been stored by recordregion. - * If maxargs is non-negative, at most maxargs arguments will be created, by - * joining together the last arguments. - */ -void -ifsbreakup(char *string, int maxargs, struct arglist *arglist) -{ - struct ifsregion *ifsp; - struct strlist *sp; - char *start; - char *p; - char *q; - char *r = NULL; - const char *ifs, *realifs; - int ifsspc; - int nulonly; - - - start = string; - if (ifslastp != NULL) { - ifsspc = 0; - nulonly = 0; - realifs = ifsset() ? ifsval() : defifs; - ifsp = &ifsfirst; - do { - int afternul; - - p = string + ifsp->begoff; - afternul = nulonly; - nulonly = ifsp->nulonly; - ifs = nulonly ? nullstr : realifs; - ifsspc = 0; - while (p < string + ifsp->endoff) { - int c; - bool isifs; - bool isdefifs; - - q = p; - c = *p++; - if (c == (char)CTLESC) - c = *p++; - - isifs = strchr(ifs, c); - isdefifs = false; - if (isifs) - isdefifs = strchr(defifs, c); - - /* If only reading one more argument: - * If we have exactly one field, - * read that field without its terminator. - * If we have more than one field, - * read all fields including their terminators, - * except for trailing IFS whitespace. - * - * This means that if we have only IFS - * characters left, and at most one - * of them is non-whitespace, we stop - * reading here. - * Otherwise, we read all the remaining - * characters except for trailing - * IFS whitespace. - * - * In any case, r indicates the start - * of the characters to remove, or NULL - * if no characters should be removed. - */ - if (!maxargs) { - if (isdefifs) { - if (!r) - r = q; - continue; - } - - if (!(isifs && ifsspc)) - r = NULL; - - ifsspc = 0; - continue; - } - - if (ifsspc) { - if (isifs) - q = p; - - start = q; - - if (isdefifs) - continue; - - isifs = false; - } - - if (isifs) { - if (!(afternul || nulonly)) - ifsspc = isdefifs; - /* Ignore IFS whitespace at start */ - if (q == start && ifsspc) { - start = p; - ifsspc = 0; - continue; - } - if (maxargs > 0 && !--maxargs) { - r = q; - continue; - } - *q = '\0'; - sp = (struct strlist *)stalloc(sizeof *sp); - sp->text = start; - *arglist->lastp = sp; - arglist->lastp = &sp->next; - start = p; - continue; - } - - ifsspc = 0; - } - } while ((ifsp = ifsp->next) != NULL); - if (nulonly) - goto add; - } - - if (r) - *r = '\0'; - - if (!*start) - return; - -add: - sp = (struct strlist *)stalloc(sizeof *sp); - sp->text = start; - *arglist->lastp = sp; - arglist->lastp = &sp->next; -} - -void ifsfree(void) -{ - struct ifsregion *p = ifsfirst.next; - - if (!p) - goto out; - - INTOFF; - do { - struct ifsregion *ifsp; - ifsp = p->next; - ckfree(p); - p = ifsp; - } while (p); - ifsfirst.next = NULL; - INTON; - -out: - ifslastp = NULL; -} - - - -/* - * Expand shell metacharacters. At this point, the only control characters - * should be escapes. The results are stored in the list exparg. - */ - -#ifdef HAVE_GLOB -STATIC void -expandmeta(struct strlist *str) -{ - /* TODO - EXP_REDIR */ - - while (str) { - const char *p; - glob_t pglob; - int i; - - if (fflag) - goto nometa; - INTOFF; - p = preglob(str->text, RMESCAPE_ALLOC | RMESCAPE_HEAP); - i = glob(p, GLOB_NOMAGIC, 0, &pglob); - if (p != str->text) - ckfree(p); - switch (i) { - case 0: - if ((pglob.gl_flags & (GLOB_NOMAGIC | GLOB_NOCHECK)) == - (GLOB_NOMAGIC | GLOB_NOCHECK)) - goto nometa2; - addglob(&pglob); - globfree(&pglob); - INTON; - break; - case GLOB_NOMATCH: -nometa2: - globfree(&pglob); - INTON; -nometa: - *exparg.lastp = str; - rmescapes(str->text); - exparg.lastp = &str->next; - break; - default: /* GLOB_NOSPACE */ - sh_error("Out of space"); - } - str = str->next; - } -} - - -/* - * Add the result of glob(3) to the list. - */ - -STATIC void -addglob(pglob) - const glob_t *pglob; -{ - char **p = pglob->gl_pathv; - - do { - addfname(*p); - } while (*++p); -} - - -#else /* HAVE_GLOB */ -STATIC char *expdir; -STATIC unsigned expdir_max; - - -STATIC void -expandmeta(struct strlist *str) -{ - static const char metachars[] = { - '*', '?', '[', 0 - }; - /* TODO - EXP_REDIR */ - - while (str) { - struct strlist **savelastp; - struct strlist *sp; - char *p; - unsigned len; - - if (fflag) - goto nometa; - if (!strpbrk(str->text, metachars)) - goto nometa; - savelastp = exparg.lastp; - - INTOFF; - p = preglob(str->text, RMESCAPE_ALLOC | RMESCAPE_HEAP); - len = strlen(p); - expdir_max = len + PATH_MAX; - expdir = ckmalloc(expdir_max); - - expmeta(p, len, 0); - ckfree(expdir); - if (p != str->text) - ckfree(p); - INTON; - if (exparg.lastp == savelastp) { - /* - * no matches - */ -nometa: - *exparg.lastp = str; - rmescapes(str->text); - exparg.lastp = &str->next; - } else { - *exparg.lastp = NULL; - *savelastp = sp = expsort(*savelastp); - while (sp->next != NULL) - sp = sp->next; - exparg.lastp = &sp->next; - } - str = str->next; - } -} - - -/* - * Do metacharacter (i.e. *, ?, [...]) expansion. - */ - -STATIC void -expmeta(char *name, unsigned name_len, unsigned expdir_len) -{ - char *enddir = expdir + expdir_len; - char *p; - const char *cp; - char *start; - char *endname; - int metaflag; - struct stat64 statb; - DIR *dirp; - struct dirent64 *dp; - int atend; - int matchdot; - int esc; - - metaflag = 0; - start = name; - for (p = name; esc = 0, *p; p += esc + 1) { - if (*p == '*' || *p == '?') - metaflag = 1; - else if (*p == '[') { - char *q = p + 1; - if (*q == '!') - q++; - for (;;) { - if (*q == '\\') - q++; - if (*q == '/' || *q == '\0') - break; - if (*++q == ']') { - metaflag = 1; - break; - } - } - } else { - if (*p == '\\' && p[1]) - esc++; - if (p[esc] == '/') { - if (metaflag) - break; - start = p + esc + 1; - } - } - } - if (metaflag == 0) { /* we've reached the end of the file name */ - if (!expdir_len) - return; - p = name; - do { - if (*p == '\\' && p[1]) - p++; - *enddir++ = *p; - } while (*p++); - if (lstat64(expdir, &statb) >= 0) - addfname(expdir); - return; - } - endname = p; - if (name < start) { - p = name; - do { - if (*p == '\\' && p[1]) - p++; - *enddir++ = *p++; - } while (p < start); - } - *enddir = 0; - cp = expdir; - expdir_len = enddir - cp; - if (!expdir_len) - cp = "."; - if ((dirp = opendir(cp)) == NULL) - return; - if (*endname == 0) { - atend = 1; - } else { - atend = 0; - *endname = '\0'; - endname += esc + 1; - } - name_len -= endname - name; - matchdot = 0; - p = start; - if (*p == '\\') - p++; - if (*p == '.') - matchdot++; - while (! int_pending() && (dp = readdir64(dirp)) != NULL) { - if (dp->d_name[0] == '.' && ! matchdot) - continue; - if (pmatch(start, dp->d_name)) { - if (atend) { - scopy(dp->d_name, enddir); - addfname(expdir); - } else { - unsigned offset; - unsigned len; - - p = stpcpy(enddir, dp->d_name); - *p = '/'; - - offset = p - expdir + 1; - len = offset + name_len + NAME_MAX; - if (len > expdir_max) { - len += PATH_MAX; - expdir = ckrealloc(expdir, len); - expdir_max = len; - } - - expmeta(endname, name_len, offset); - enddir = expdir + expdir_len; - } - } - } - closedir(dirp); - if (! atend) - endname[-esc - 1] = esc ? '\\' : '/'; -} -#endif /* HAVE_GLOB */ - - -/* - * Add a file name to the list. - */ - -STATIC void -addfname(char *name) -{ - struct strlist *sp; - - sp = (struct strlist *)stalloc(sizeof *sp); - sp->text = sstrdup(name); - *exparg.lastp = sp; - exparg.lastp = &sp->next; -} - - -#ifndef HAVE_GLOB -/* - * Sort the results of file name expansion. It calculates the number of - * strings to sort and then calls msort (short for merge sort) to do the - * work. - */ - -STATIC struct strlist * -expsort(struct strlist *str) -{ - int len; - struct strlist *sp; - - len = 0; - for (sp = str ; sp ; sp = sp->next) - len++; - return msort(str, len); -} - - -STATIC struct strlist * -msort(struct strlist *list, int len) -{ - struct strlist *p, *q = NULL; - struct strlist **lpp; - int half; - int n; - - if (len <= 1) - return list; - half = len >> 1; - p = list; - for (n = half ; --n >= 0 ; ) { - q = p; - p = p->next; - } - q->next = NULL; /* terminate first half of list */ - q = msort(list, half); /* sort first half of list */ - p = msort(p, len - half); /* sort second half */ - lpp = &list; - for (;;) { - if (strcmp(p->text, q->text) < 0) { - *lpp = p; - lpp = &p->next; - if ((p = *lpp) == NULL) { - *lpp = q; - break; - } - } else { - *lpp = q; - lpp = &q->next; - if ((q = *lpp) == NULL) { - *lpp = p; - break; - } - } - } - return list; -} -#endif - - -/* - * Returns true if the pattern matches the string. - */ - -STATIC inline int -patmatch(char *pattern, const char *string) -{ - return pmatch(preglob(pattern, 0), string); -} - - -#ifndef HAVE_FNMATCH -STATIC int ccmatch(const char *p, int chr, const char **r) -{ - static const struct class { - char name[10]; - int (*fn)(int); - } classes[] = { - { .name = ":alnum:]", .fn = isalnum }, - { .name = ":cntrl:]", .fn = iscntrl }, - { .name = ":lower:]", .fn = islower }, - { .name = ":space:]", .fn = isspace }, - { .name = ":alpha:]", .fn = isalpha }, - { .name = ":digit:]", .fn = isdigit }, - { .name = ":print:]", .fn = isprint }, - { .name = ":upper:]", .fn = isupper }, - { .name = ":blank:]", .fn = isblank }, - { .name = ":graph:]", .fn = isgraph }, - { .name = ":punct:]", .fn = ispunct }, - { .name = ":xdigit:]", .fn = isxdigit }, - }; - const struct class *class, *end; - - end = classes + sizeof(classes) / sizeof(classes[0]); - for (class = classes; class < end; class++) { - const char *q; - - q = prefix(p, class->name); - if (!q) - continue; - *r = q; - return class->fn(chr); - } - - *r = 0; - return 0; -} - -STATIC int -pmatch(const char *pattern, const char *string) -{ - const char *p, *q; - char c; - - p = pattern; - q = string; - for (;;) { - switch (c = *p++) { - case '\0': - goto breakloop; - case '\\': - if (*p) { - c = *p++; - } - goto dft; - case '?': - if (*q++ == '\0') - return 0; - break; - case '*': - c = *p; - while (c == '*') - c = *++p; - if (c != '\\' && c != '?' && c != '*' && c != '[') { - while (*q != c) { - if (*q == '\0') - return 0; - q++; - } - } - do { - if (pmatch(p, q)) - return 1; - } while (*q++ != '\0'); - return 0; - case '[': { - const char *startp; - int invert, found; - char chr; - - startp = p; - invert = 0; - if (*p == '!') { - invert++; - p++; - } - found = 0; - chr = *q; - if (chr == '\0') - return 0; - c = *p++; - do { - if (!c) { - p = startp; - c = '['; - goto dft; - } - if (c == '[') { - const char *r; - - found |= !!ccmatch(p, chr, &r); - if (r) { - p = r; - continue; - } - } else if (c == '\\') - c = *p++; - if (*p == '-' && p[1] != ']') { - p++; - if (*p == '\\') - p++; - if (chr >= c && chr <= *p) - found = 1; - p++; - } else { - if (chr == c) - found = 1; - } - } while ((c = *p++) != ']'); - if (found == invert) - return 0; - q++; - break; - } -dft: default: - if (*q++ != c) - return 0; - break; - } - } -breakloop: - if (*q != '\0') - return 0; - return 1; -} -#endif - - - -/* - * Remove any CTLESC characters from a string. - */ - -char * -_rmescapes(char *str, int flag) -{ - char *p, *q, *r; - int notescaped; - int globbing; - - p = strpbrk(str, qchars); - if (!p) { - return str; - } - q = p; - r = str; - if (flag & RMESCAPE_ALLOC) { - size_t len = p - str; - size_t fulllen = len + strlen(p) + 1; - - if (flag & RMESCAPE_GROW) { - int strloc = str - (char *)stackblock(); - - r = makestrspace(fulllen, expdest); - str = (char *)stackblock() + strloc; - p = str + len; - } else if (flag & RMESCAPE_HEAP) { - r = ckmalloc(fulllen); - } else { - r = stalloc(fulllen); - } - q = r; - if (len > 0) { - q = mempcpy(q, str, len); - } - } - globbing = flag & RMESCAPE_GLOB; - notescaped = globbing; - while (*p) { - if (*p == (char)CTLQUOTEMARK) { - p++; - notescaped = globbing; - continue; - } - if (*p == '\\') { - /* naked back slash */ - notescaped = 0; - goto copy; - } - if (*p == (char)CTLESC) { - p++; - if (notescaped) - *q++ = '\\'; - } - notescaped = globbing; -copy: - *q++ = *p++; - } - *q = '\0'; - if (flag & RMESCAPE_GROW) { - expdest = r; - STADJUST(q - r + 1, expdest); - } - return r; -} - - - -/* - * See if a pattern matches in a case statement. - */ - -int -casematch(union node *pattern, char *val) -{ - struct stackmark smark; - int result; - - setstackmark(&smark); - argbackq = pattern->narg.backquote; - STARTSTACKSTR(expdest); - argstr(pattern->narg.text, EXP_TILDE | EXP_CASE); - ifsfree(); - result = patmatch(stackblock(), val); - popstackmark(&smark); - return result; -} - -/* - * Our own itoa(). - */ - -static size_t cvtnum(intmax_t num, int flags) -{ - int len = max_int_length(sizeof(num)); - char buf[len]; - - len = fmtstr(buf, len, "%" PRIdMAX, num); - return memtodest(buf, len, flags); -} - -STATIC void -varunset(const char *end, const char *var, const char *umsg, int varflags) -{ - const char *msg; - const char *tail; - - tail = nullstr; - msg = "parameter not set"; - if (umsg) { - if (*end == (char)CTLENDVAR) { - if (varflags & VSNUL) - tail = " or null"; - } else - msg = umsg; - } - sh_error("%.*s: %s%s", end - var - 1, var, msg, tail); -} - -#ifdef mkinit - -INCLUDE "expand.h" - -EXITRESET { - ifsfree(); -} - -#endif diff --git a/bin/dash/src/expand.h b/bin/dash/src/expand.h deleted file mode 100644 index c44b8481..00000000 --- a/bin/dash/src/expand.h +++ /dev/null @@ -1,83 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)expand.h 8.2 (Berkeley) 5/4/95 - */ - -#include <inttypes.h> - -struct strlist { - struct strlist *next; - char *text; -}; - - -struct arglist { - struct strlist *list; - struct strlist **lastp; -}; - -/* - * expandarg() flags - */ -#define EXP_FULL 0x1 /* perform word splitting & file globbing */ -#define EXP_TILDE 0x2 /* do normal tilde expansion */ -#define EXP_VARTILDE 0x4 /* expand tildes in an assignment */ -#define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */ -#define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */ -#define EXP_VARTILDE2 0x40 /* expand tildes after colons only */ -#define EXP_WORD 0x80 /* expand word in parameter expansion */ -#define EXP_QUOTED 0x100 /* expand word in double quotes */ -#define EXP_KEEPNUL 0x200 /* do not skip NUL characters */ -#define EXP_DISCARD 0x400 /* discard result of expansion */ - - -union node; -void expandarg(union node *, struct arglist *, int); -#define rmescapes(p) _rmescapes((p), 0) -char *_rmescapes(char *, int); -int casematch(union node *, char *); -void recordregion(int, int, int); -void removerecordregions(int); -void ifsbreakup(char *, int, struct arglist *); -void ifsfree(void); - -/* From arith.y */ -intmax_t arith(const char *); -int expcmd(int , char **); -#ifdef USE_LEX -void arith_lex_reset(void); -#else -#define arith_lex_reset() -#endif -int yylex(void); diff --git a/bin/dash/src/funcs/cmv b/bin/dash/src/funcs/cmv deleted file mode 100644 index 91a67c53..00000000 --- a/bin/dash/src/funcs/cmv +++ /dev/null @@ -1,47 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)cmv 8.2 (Berkeley) 5/4/95 - -# Conditional move--don't replace an existing file. - -cmv() { - if test $# != 2 - then echo "cmv: arg count" - return 2 - fi - if test -f "$2" -o -w "$2" - then echo "$2 exists" - return 2 - fi - /bin/mv "$1" "$2" -} diff --git a/bin/dash/src/funcs/dirs b/bin/dash/src/funcs/dirs deleted file mode 100644 index 5f6ce635..00000000 --- a/bin/dash/src/funcs/dirs +++ /dev/null @@ -1,71 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)dirs 8.2 (Berkeley) 5/4/95 - -# pushd, popd, and dirs --- written by Chris Bertin -# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris -# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW - -pushd () { - SAVE=`pwd` - if [ "$1" = "" ] - then if [ "$DSTACK" = "" ] - then echo "pushd: directory stack empty." - return 1 - fi - set $DSTACK - cd $1 || return - shift 1 - DSTACK="$*" - else cd $1 > /dev/null || return - fi - DSTACK="$SAVE $DSTACK" - dirs -} - -popd () { - if [ "$DSTACK" = "" ] - then echo "popd: directory stack empty." - return 1 - fi - set $DSTACK - cd $1 - shift - DSTACK=$* - dirs -} - -dirs () { - echo "`pwd` $DSTACK" - return 0 -} diff --git a/bin/dash/src/funcs/kill b/bin/dash/src/funcs/kill deleted file mode 100644 index c5df95f5..00000000 --- a/bin/dash/src/funcs/kill +++ /dev/null @@ -1,47 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)kill 8.2 (Berkeley) 5/4/95 - -# Convert job names to process ids and then run /bin/kill. - -kill() { - local args x - args= - for x in "$@" - do case $x in - %*) x=`jobid "$x"` ;; - esac - args="$args $x" - done - /bin/kill $args -} diff --git a/bin/dash/src/funcs/login b/bin/dash/src/funcs/login deleted file mode 100644 index 215e5352..00000000 --- a/bin/dash/src/funcs/login +++ /dev/null @@ -1,36 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)login 8.2 (Berkeley) 5/4/95 - -# replaces the login builtin in the BSD shell -login () exec login "$@" diff --git a/bin/dash/src/funcs/newgrp b/bin/dash/src/funcs/newgrp deleted file mode 100644 index ec0e7e5a..00000000 --- a/bin/dash/src/funcs/newgrp +++ /dev/null @@ -1,35 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)newgrp 8.2 (Berkeley) 5/4/95 - -newgrp() exec newgrp "$@" diff --git a/bin/dash/src/funcs/popd b/bin/dash/src/funcs/popd deleted file mode 100644 index 7bccf50d..00000000 --- a/bin/dash/src/funcs/popd +++ /dev/null @@ -1,71 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)popd 8.2 (Berkeley) 5/4/95 - -# pushd, popd, and dirs --- written by Chris Bertin -# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris -# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW - -pushd () { - SAVE=`pwd` - if [ "$1" = "" ] - then if [ "$DSTACK" = "" ] - then echo "pushd: directory stack empty." - return 1 - fi - set $DSTACK - cd $1 || return - shift 1 - DSTACK="$*" - else cd $1 > /dev/null || return - fi - DSTACK="$SAVE $DSTACK" - dirs -} - -popd () { - if [ "$DSTACK" = "" ] - then echo "popd: directory stack empty." - return 1 - fi - set $DSTACK - cd $1 - shift - DSTACK=$* - dirs -} - -dirs () { - echo "`pwd` $DSTACK" - return 0 -} diff --git a/bin/dash/src/funcs/pushd b/bin/dash/src/funcs/pushd deleted file mode 100644 index 19ac8e08..00000000 --- a/bin/dash/src/funcs/pushd +++ /dev/null @@ -1,71 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)pushd 8.2 (Berkeley) 5/4/95 - -# pushd, popd, and dirs --- written by Chris Bertin -# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris -# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW - -pushd () { - SAVE=`pwd` - if [ "$1" = "" ] - then if [ "$DSTACK" = "" ] - then echo "pushd: directory stack empty." - return 1 - fi - set $DSTACK - cd $1 || return - shift 1 - DSTACK="$*" - else cd $1 > /dev/null || return - fi - DSTACK="$SAVE $DSTACK" - dirs -} - -popd () { - if [ "$DSTACK" = "" ] - then echo "popd: directory stack empty." - return 1 - fi - set $DSTACK - cd $1 - shift - DSTACK=$* - dirs -} - -dirs () { - echo "`pwd` $DSTACK" - return 0 -} diff --git a/bin/dash/src/funcs/suspend b/bin/dash/src/funcs/suspend deleted file mode 100644 index 44844678..00000000 --- a/bin/dash/src/funcs/suspend +++ /dev/null @@ -1,39 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)suspend 8.2 (Berkeley) 5/4/95 - -suspend() { - local - - set +j - kill -TSTP 0 -} diff --git a/bin/dash/src/histedit.c b/bin/dash/src/histedit.c deleted file mode 100644 index 1b7ad238..00000000 --- a/bin/dash/src/histedit.c +++ /dev/null @@ -1,504 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/param.h> -#ifdef HAVE_PATHS_H -#include <paths.h> -#endif -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <getopt.h> -/* - * Editline and history functions (and glue). - */ -#include "shell.h" -#include "parser.h" -#include "var.h" -#include "options.h" -#include "main.h" -#include "output.h" -#include "mystring.h" -#include "error.h" -#ifndef SMALL -#include "myhistedit.h" -#include "eval.h" -#include "memalloc.h" - -#define MAXHISTLOOPS 4 /* max recursions through fc */ -#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ - -History *hist; /* history cookie */ -EditLine *el; /* editline cookie */ -int displayhist; -static FILE *el_in, *el_out; - -STATIC const char *fc_replace(const char *, char *, char *); - -#ifdef DEBUG -extern FILE *tracefile; -#endif - -/* - * Set history and editing status. Called whenever the status may - * have changed (figures out what to do). - */ -void -histedit(void) -{ - FILE *el_err; - -#define editing (Eflag || Vflag) - - if (iflag) { - if (!hist) { - /* - * turn history on - */ - INTOFF; - hist = history_init(); - INTON; - - if (hist != NULL) - sethistsize(histsizeval()); - else - out2str("sh: can't initialize history\n"); - } - if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ - /* - * turn editing on - */ - INTOFF; - if (el_in == NULL) - el_in = fdopen(0, "r"); - if (el_out == NULL) - el_out = fdopen(2, "w"); - if (el_in == NULL || el_out == NULL) - goto bad; - el_err = el_out; -#if DEBUG - if (tracefile) - el_err = tracefile; -#endif - el = el_init(arg0, el_in, el_out, el_err); - if (el != NULL) { - if (hist) - el_set(el, EL_HIST, history, hist); - el_set(el, EL_PROMPT, getprompt); - el_set(el, EL_RPROMPT, getrprompt); -#ifdef HAVE__EL_FN_SH_COMPLETE - el_set(el, EL_ADDFN, "sh-complete", "Filename completion", - _el_fn_sh_complete); -#else - el_set(el, EL_ADDFN, "sh-complete", "Filename completion", - _el_fn_complete); -#endif - } else { -bad: - out2str("sh: can't initialize editing\n"); - } - INTON; - } else if (!editing && el) { - INTOFF; - el_end(el); - el = NULL; - INTON; - } - if (el) { - if (Vflag) - el_set(el, EL_EDITOR, "vi"); - else if (Eflag) - el_set(el, EL_EDITOR, "emacs"); - el_source(el, NULL); - el_set(el, EL_BIND, "^I", "sh-complete", NULL); - } - } else { - INTOFF; - if (el) { /* no editing if not interactive */ - el_end(el); - el = NULL; - } - if (hist) { - history_end(hist); - hist = NULL; - } - INTON; - } -} - - -void -sethistsize(const char *hs) -{ - int histsize; - HistEvent he; - - if (hist != NULL) { - if (hs == NULL || *hs == '\0' || - (histsize = atoi(hs)) < 0) - histsize = 100; - history(hist, &he, H_SETSIZE, histsize); - history(hist, &he, H_SETUNIQUE, 1); - } -} - -void -setterm(const char *term) -{ - if (el != NULL && term != NULL) - if (el_set(el, EL_TERMINAL, term) != 0) { - outfmt(out2, "sh: Can't set terminal type %s\n", term); - outfmt(out2, "sh: Using dumb terminal settings.\n"); - } -} - -/* - * This command is provided since POSIX decided to standardize - * the Korn shell fc command. Oh well... - */ -int -histcmd(int argc, char **argv) -{ - int ch; - const char *editor = NULL; - HistEvent he; - int lflg = 0, nflg = 0, rflg = 0, sflg = 0; - int i, retval; - const char *firststr, *laststr; - int first, last, direction; - char *pat = NULL, *repl; /* ksh "fc old=new" crap */ - static int active = 0; - struct jmploc jmploc; - struct jmploc *volatile savehandler; - char editfile[MAXPATHLEN + 1]; - FILE *efp; -#ifdef __GNUC__ - /* Avoid longjmp clobbering */ - (void) &editor; - (void) &lflg; - (void) &nflg; - (void) &rflg; - (void) &sflg; - (void) &firststr; - (void) &laststr; - (void) &pat; - (void) &repl; - (void) &efp; - (void) &argc; - (void) &argv; -#endif - - if (hist == NULL) - sh_error("history not active"); - - if (argc == 1) - sh_error("missing history argument"); - -#ifdef __GLIBC__ - optind = 0; -#else - optreset = 1; optind = 1; /* initialize getopt */ -#endif - while (not_fcnumber(argv[optind]) && - (ch = getopt(argc, argv, ":e:lnrs")) != -1) - switch ((char)ch) { - case 'e': - editor = optionarg; - break; - case 'l': - lflg = 1; - break; - case 'n': - nflg = 1; - break; - case 'r': - rflg = 1; - break; - case 's': - sflg = 1; - break; - case ':': - sh_error("option -%c expects argument", optopt); - /* NOTREACHED */ - case '?': - default: - sh_error("unknown option: -%c", optopt); - /* NOTREACHED */ - } - argc -= optind, argv += optind; - - /* - * If executing... - */ - if (lflg == 0 || editor || sflg) { - lflg = 0; /* ignore */ - editfile[0] = '\0'; - /* - * Catch interrupts to reset active counter and - * cleanup temp files. - */ - if (setjmp(jmploc.loc)) { - active = 0; - if (*editfile) - unlink(editfile); - handler = savehandler; - longjmp(handler->loc, 1); - } - savehandler = handler; - handler = &jmploc; - if (++active > MAXHISTLOOPS) { - active = 0; - displayhist = 0; - sh_error("called recursively too many times"); - } - /* - * Set editor. - */ - if (sflg == 0) { - if (editor == NULL && - (editor = bltinlookup("FCEDIT")) == NULL && - (editor = bltinlookup("EDITOR")) == NULL) - editor = DEFEDITOR; - if (editor[0] == '-' && editor[1] == '\0') { - sflg = 1; /* no edit */ - editor = NULL; - } - } - } - - /* - * If executing, parse [old=new] now - */ - if (lflg == 0 && argc > 0 && - ((repl = strchr(argv[0], '=')) != NULL)) { - pat = argv[0]; - *repl++ = '\0'; - argc--, argv++; - } - /* - * determine [first] and [last] - */ - switch (argc) { - case 0: - firststr = lflg ? "-16" : "-1"; - laststr = "-1"; - break; - case 1: - firststr = argv[0]; - laststr = lflg ? "-1" : argv[0]; - break; - case 2: - firststr = argv[0]; - laststr = argv[1]; - break; - default: - sh_error("too many args"); - /* NOTREACHED */ - } - /* - * Turn into event numbers. - */ - first = str_to_event(firststr, 0); - last = str_to_event(laststr, 1); - - if (rflg) { - i = last; - last = first; - first = i; - } - /* - * XXX - this should not depend on the event numbers - * always increasing. Add sequence numbers or offset - * to the history element in next (diskbased) release. - */ - direction = first < last ? H_PREV : H_NEXT; - - /* - * If editing, grab a temp file. - */ - if (editor) { - int fd; - INTOFF; /* easier */ - sprintf(editfile, "%s_shXXXXXX", _PATH_TMP); - if ((fd = mkstemp(editfile)) < 0) - sh_error("can't create temporary file %s", editfile); - if ((efp = fdopen(fd, "w")) == NULL) { - close(fd); - sh_error("can't allocate stdio buffer for temp"); - } - } - - /* - * Loop through selected history events. If listing or executing, - * do it now. Otherwise, put into temp file and call the editor - * after. - * - * The history interface needs rethinking, as the following - * convolutions will demonstrate. - */ - history(hist, &he, H_FIRST); - retval = history(hist, &he, H_NEXT_EVENT, first); - for (;retval != -1; retval = history(hist, &he, direction)) { - if (lflg) { - if (!nflg) - out1fmt("%5d ", he.num); - out1str(he.str); - } else { - const char *s = pat ? - fc_replace(he.str, pat, repl) : he.str; - - if (sflg) { - if (displayhist) { - out2str(s); - } - - evalstring(s, 0); - if (displayhist && hist) { - /* - * XXX what about recursive and - * relative histnums. - */ - history(hist, &he, H_ENTER, s); - } - } else - fputs(s, efp); - } - /* - * At end? (if we were to lose last, we'd sure be - * messed up). - */ - if (he.num == last) - break; - } - if (editor) { - char *editcmd; - - fclose(efp); - editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); - sprintf(editcmd, "%s %s", editor, editfile); - /* XXX - should use no JC command */ - evalstring(editcmd, 0); - INTON; - readcmdfile(editfile); /* XXX - should read back - quick tst */ - unlink(editfile); - } - - if (lflg == 0 && active > 0) - --active; - if (displayhist) - displayhist = 0; - return 0; -} - -STATIC const char * -fc_replace(const char *s, char *p, char *r) -{ - char *dest; - int plen = strlen(p); - - STARTSTACKSTR(dest); - while (*s) { - if (*s == *p && strncmp(s, p, plen) == 0) { - while (*r) - STPUTC(*r++, dest); - s += plen; - *p = '\0'; /* so no more matches */ - } else - STPUTC(*s++, dest); - } - STACKSTRNUL(dest); - dest = grabstackstr(dest); - - return (dest); -} - -int -not_fcnumber(char *s) -{ - if (s == NULL) - return 0; - if (*s == '-') - s++; - return (!is_number(s)); -} - -int -str_to_event(const char *str, int last) -{ - HistEvent he; - const char *s = str; - int relative = 0; - int i, retval; - - retval = history(hist, &he, H_FIRST); - switch (*s) { - case '-': - relative = 1; - /*FALLTHROUGH*/ - case '+': - s++; - } - if (is_number(s)) { - i = atoi(s); - if (relative) { - while (retval != -1 && i--) { - retval = history(hist, &he, H_NEXT); - } - if (retval == -1) - retval = history(hist, &he, H_LAST); - } else { - retval = history(hist, &he, H_NEXT_EVENT, i); - if (retval == -1) { - /* - * the notion of first and last is - * backwards to that of the history package - */ - retval = history(hist, &he, - last ? H_FIRST : H_LAST); - } - } - if (retval == -1) - sh_error("history number %s not found (internal error)", - str); - } else { - /* - * pattern - */ - retval = history(hist, &he, H_PREV_STR, str); - if (retval == -1) - sh_error("history pattern not found: %s", str); - } - return (he.num); -} -#endif diff --git a/bin/dash/src/init.h b/bin/dash/src/init.h deleted file mode 100644 index d56fb28e..00000000 --- a/bin/dash/src/init.h +++ /dev/null @@ -1,40 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)init.h 8.2 (Berkeley) 5/4/95 - */ - -void init(void); -void exitreset(void); -void forkreset(void); -void reset(void); diff --git a/bin/dash/src/input.c b/bin/dash/src/input.c deleted file mode 100644 index 4167bd18..00000000 --- a/bin/dash/src/input.c +++ /dev/null @@ -1,498 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <stdio.h> /* defines BUFSIZ */ -#include <fcntl.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> - -/* - * This file implements the input routines used by the parser. - */ - -#include "eval.h" -#include "shell.h" -#include "redir.h" -#include "syntax.h" -#include "input.h" -#include "output.h" -#include "options.h" -#include "memalloc.h" -#include "error.h" -#include "alias.h" -#include "parser.h" -#include "main.h" -#ifndef SMALL -#include "myhistedit.h" -#endif - -#define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */ -#define IBUFSIZ (BUFSIZ + 1) - - -MKINIT struct parsefile basepf; /* top level input file */ -MKINIT char basebuf[IBUFSIZ]; /* buffer for top level input file */ -struct parsefile *parsefile = &basepf; /* current input file */ -int whichprompt; /* 1 == PS1, 2 == PS2 */ - -STATIC void pushfile(void); -static int preadfd(void); -static void setinputfd(int fd, int push); -static int preadbuffer(void); - -#ifdef mkinit -INCLUDE <stdio.h> -INCLUDE <unistd.h> -INCLUDE "input.h" -INCLUDE "error.h" - -INIT { - basepf.nextc = basepf.buf = basebuf; - basepf.linno = 1; -} - -RESET { - /* clear input buffer */ - basepf.lleft = basepf.nleft = 0; - popallfiles(); -} - -FORKRESET { - popallfiles(); - if (parsefile->fd > 0) { - close(parsefile->fd); - parsefile->fd = 0; - } -} -#endif - - -/* - * Read a character from the script, returning PEOF on end of file. - * Nul characters in the input are silently discarded. - */ - -int -pgetc(void) -{ - int c; - - if (parsefile->unget) - return parsefile->lastc[--parsefile->unget]; - - if (--parsefile->nleft >= 0) - c = (signed char)*parsefile->nextc++; - else - c = preadbuffer(); - - parsefile->lastc[1] = parsefile->lastc[0]; - parsefile->lastc[0] = c; - - return c; -} - - -/* - * Same as pgetc(), but ignores PEOA. - */ - -int -pgetc2() -{ - int c; - do { - c = pgetc(); - } while (c == PEOA); - return c; -} - - -static int -preadfd(void) -{ - int nr; - char *buf = parsefile->buf; - parsefile->nextc = buf; - -retry: -#ifndef SMALL - if (parsefile->fd == 0 && el) { - static const char *rl_cp; - static int el_len; - - if (rl_cp == NULL) - rl_cp = el_gets(el, &el_len); - if (rl_cp == NULL) - nr = 0; - else { - nr = el_len; - if (nr > IBUFSIZ - 1) - nr = IBUFSIZ - 1; - memcpy(buf, rl_cp, nr); - if (nr != el_len) { - el_len -= nr; - rl_cp += nr; - } else - rl_cp = 0; - } - - } else -#endif - nr = read(parsefile->fd, buf, IBUFSIZ - 1); - - - if (nr < 0) { - if (errno == EINTR) - goto retry; - if (parsefile->fd == 0 && errno == EWOULDBLOCK) { - int flags = fcntl(0, F_GETFL, 0); - if (flags >= 0 && flags & O_NONBLOCK) { - flags &=~ O_NONBLOCK; - if (fcntl(0, F_SETFL, flags) >= 0) { - out2str("sh: turning off NDELAY mode\n"); - goto retry; - } - } - } - } - return nr; -} - -/* - * Refill the input buffer and return the next input character: - * - * 1) If a string was pushed back on the input, pop it; - * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading - * from a string so we can't refill the buffer, return EOF. - * 3) If the is more stuff in this buffer, use it else call read to fill it. - * 4) Process input up to the next newline, deleting nul characters. - */ - -static int preadbuffer(void) -{ - char *q; - int more; -#ifndef SMALL - int something; -#endif - char savec; - - if (unlikely(parsefile->strpush)) { - if ( - parsefile->nleft == -1 && - parsefile->strpush->ap && - parsefile->nextc[-1] != ' ' && - parsefile->nextc[-1] != '\t' - ) { - return PEOA; - } - popstring(); - return pgetc(); - } - if (unlikely(parsefile->nleft == EOF_NLEFT || - parsefile->buf == NULL)) - return PEOF; - flushall(); - - more = parsefile->lleft; - if (more <= 0) { -again: - if ((more = preadfd()) <= 0) { - parsefile->lleft = parsefile->nleft = EOF_NLEFT; - return PEOF; - } - } - - q = parsefile->nextc; - - /* delete nul characters */ -#ifndef SMALL - something = 0; -#endif - for (;;) { - int c; - - more--; - c = *q; - - if (!c) - memmove(q, q + 1, more); - else { - q++; - - if (c == '\n') { - parsefile->nleft = q - parsefile->nextc - 1; - break; - } - -#ifndef SMALL - switch (c) { - default: - something = 1; - /* fall through */ - case '\t': - case ' ': - break; - } -#endif - } - - if (more <= 0) { - parsefile->nleft = q - parsefile->nextc - 1; - if (parsefile->nleft < 0) - goto again; - break; - } - } - parsefile->lleft = more; - - savec = *q; - *q = '\0'; - -#ifndef SMALL - if (parsefile->fd == 0 && hist && something) { - HistEvent he; - INTOFF; - history(hist, &he, whichprompt == 1? H_ENTER : H_APPEND, - parsefile->nextc); - INTON; - } -#endif - - if (vflag) { - out2str(parsefile->nextc); -#ifdef FLUSHERR - flushout(out2); -#endif - } - - *q = savec; - - return (signed char)*parsefile->nextc++; -} - -/* - * Undo a call to pgetc. Only two characters may be pushed back. - * PEOF may be pushed back. - */ - -void -pungetc(void) -{ - parsefile->unget++; -} - -/* - * Push a string back onto the input at this current parsefile level. - * We handle aliases this way. - */ -void -pushstring(char *s, void *ap) -{ - struct strpush *sp; - size_t len; - - len = strlen(s); - INTOFF; -/*dprintf("*** calling pushstring: %s, %d\n", s, len);*/ - if (parsefile->strpush) { - sp = ckmalloc(sizeof (struct strpush)); - sp->prev = parsefile->strpush; - parsefile->strpush = sp; - } else - sp = parsefile->strpush = &(parsefile->basestrpush); - sp->prevstring = parsefile->nextc; - sp->prevnleft = parsefile->nleft; - sp->unget = parsefile->unget; - memcpy(sp->lastc, parsefile->lastc, sizeof(sp->lastc)); - sp->ap = (struct alias *)ap; - if (ap) { - ((struct alias *)ap)->flag |= ALIASINUSE; - sp->string = s; - } - parsefile->nextc = s; - parsefile->nleft = len; - parsefile->unget = 0; - INTON; -} - -void -popstring(void) -{ - struct strpush *sp = parsefile->strpush; - - INTOFF; - if (sp->ap) { - if (parsefile->nextc[-1] == ' ' || - parsefile->nextc[-1] == '\t') { - checkkwd |= CHKALIAS; - } - if (sp->string != sp->ap->val) { - ckfree(sp->string); - } - sp->ap->flag &= ~ALIASINUSE; - if (sp->ap->flag & ALIASDEAD) { - unalias(sp->ap->name); - } - } - parsefile->nextc = sp->prevstring; - parsefile->nleft = sp->prevnleft; - parsefile->unget = sp->unget; - memcpy(parsefile->lastc, sp->lastc, sizeof(sp->lastc)); -/*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/ - parsefile->strpush = sp->prev; - if (sp != &(parsefile->basestrpush)) - ckfree(sp); - INTON; -} - -/* - * Set the input to take input from a file. If push is set, push the - * old input onto the stack first. - */ - -int -setinputfile(const char *fname, int flags) -{ - int fd; - - INTOFF; - if ((fd = open64(fname, O_RDONLY)) < 0) { - if (flags & INPUT_NOFILE_OK) - goto out; - exitstatus = 127; - exerror(EXERROR, "Can't open %s", fname); - } - if (fd < 10) - fd = savefd(fd, fd); - setinputfd(fd, flags & INPUT_PUSH_FILE); -out: - INTON; - return fd; -} - - -/* - * Like setinputfile, but takes an open file descriptor. Call this with - * interrupts off. - */ - -static void -setinputfd(int fd, int push) -{ - if (push) { - pushfile(); - parsefile->buf = 0; - } - parsefile->fd = fd; - if (parsefile->buf == NULL) - parsefile->buf = ckmalloc(IBUFSIZ); - parsefile->lleft = parsefile->nleft = 0; - plinno = 1; -} - - -/* - * Like setinputfile, but takes input from a string. - */ - -void -setinputstring(char *string) -{ - INTOFF; - pushfile(); - parsefile->nextc = string; - parsefile->nleft = strlen(string); - parsefile->buf = NULL; - plinno = 1; - INTON; -} - - - -/* - * To handle the "." command, a stack of input files is used. Pushfile - * adds a new entry to the stack and popfile restores the previous level. - */ - -STATIC void -pushfile(void) -{ - struct parsefile *pf; - - pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile)); - pf->prev = parsefile; - pf->fd = -1; - pf->strpush = NULL; - pf->basestrpush.prev = NULL; - pf->unget = 0; - parsefile = pf; -} - - -void -popfile(void) -{ - struct parsefile *pf = parsefile; - - INTOFF; - if (pf->fd >= 0) - close(pf->fd); - if (pf->buf) - ckfree(pf->buf); - while (pf->strpush) - popstring(); - parsefile = pf->prev; - ckfree(pf); - INTON; -} - - -void unwindfiles(struct parsefile *stop) -{ - while (parsefile != stop) - popfile(); -} - - -/* - * Return to top level. - */ - -void -popallfiles(void) -{ - unwindfiles(&basepf); -} diff --git a/bin/dash/src/input.h b/bin/dash/src/input.h deleted file mode 100644 index 8acc6e9f..00000000 --- a/bin/dash/src/input.h +++ /dev/null @@ -1,101 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)input.h 8.2 (Berkeley) 5/4/95 - */ - -/* PEOF (the end of file marker) is defined in syntax.h */ - -enum { - INPUT_PUSH_FILE = 1, - INPUT_NOFILE_OK = 2, -}; - -struct alias; - -struct strpush { - struct strpush *prev; /* preceding string on stack */ - char *prevstring; - int prevnleft; - struct alias *ap; /* if push was associated with an alias */ - char *string; /* remember the string since it may change */ - - /* Remember last two characters for pungetc. */ - int lastc[2]; - - /* Number of outstanding calls to pungetc. */ - int unget; -}; - -/* - * The parsefile structure pointed to by the global variable parsefile - * contains information about the current file being read. - */ - -struct parsefile { - struct parsefile *prev; /* preceding file on stack */ - int linno; /* current line */ - int fd; /* file descriptor (or -1 if string) */ - int nleft; /* number of chars left in this line */ - int lleft; /* number of chars left in this buffer */ - char *nextc; /* next char in buffer */ - char *buf; /* input buffer */ - struct strpush *strpush; /* for pushing strings at this level */ - struct strpush basestrpush; /* so pushing one is fast */ - - /* Remember last two characters for pungetc. */ - int lastc[2]; - - /* Number of outstanding calls to pungetc. */ - int unget; -}; - -extern struct parsefile *parsefile; - -/* - * The input line number. Input.c just defines this variable, and saves - * and restores it when files are pushed and popped. The user of this - * package must set its value. - */ -#define plinno (parsefile->linno) - -int pgetc(void); -int pgetc2(void); -void pungetc(void); -void pushstring(char *, void *); -void popstring(void); -int setinputfile(const char *, int); -void setinputstring(char *); -void popfile(void); -void unwindfiles(struct parsefile *); -void popallfiles(void); diff --git a/bin/dash/src/jobs.c b/bin/dash/src/jobs.c deleted file mode 100644 index 8fb9d4b2..00000000 --- a/bin/dash/src/jobs.c +++ /dev/null @@ -1,1547 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <fcntl.h> -#include <signal.h> -#include <unistd.h> -#include <stdlib.h> -#ifdef HAVE_PATHS_H -#include <paths.h> -#endif -#include <sys/types.h> -#include <sys/param.h> -#ifdef BSD -#include <sys/wait.h> -#include <sys/time.h> -#include <sys/resource.h> -#endif -#include <sys/ioctl.h> - -#include "shell.h" -#if JOBS -#include <termios.h> -#undef CEOF /* syntax.h redefines this */ -#endif -#include "exec.h" -#include "eval.h" -#include "init.h" -#include "redir.h" -#include "show.h" -#include "main.h" -#include "parser.h" -#include "nodes.h" -#include "jobs.h" -#include "options.h" -#include "trap.h" -#include "syntax.h" -#include "input.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "mystring.h" -#include "system.h" - -/* mode flags for set_curjob */ -#define CUR_DELETE 2 -#define CUR_RUNNING 1 -#define CUR_STOPPED 0 - -/* mode flags for dowait */ -#define DOWAIT_NONBLOCK 0 -#define DOWAIT_BLOCK 1 -#define DOWAIT_WAITCMD 2 -#define DOWAIT_WAITCMD_ALL 4 - -/* array of jobs */ -static struct job *jobtab; -/* size of array */ -static unsigned njobs; -/* pid of last background process */ -pid_t backgndpid; - -#if JOBS -/* pgrp of shell on invocation */ -static int initialpgrp; -/* control terminal */ -static int ttyfd = -1; -#endif - -/* current job */ -static struct job *curjob; - -/* Set if we are in the vforked child */ -int vforked; - -STATIC void set_curjob(struct job *, unsigned); -STATIC int jobno(const struct job *); -STATIC int sprint_status(char *, int, int); -STATIC void freejob(struct job *); -STATIC struct job *getjob(const char *, int); -STATIC struct job *growjobtab(void); -STATIC void forkchild(struct job *, union node *, int); -STATIC void forkparent(struct job *, union node *, int, pid_t); -STATIC int dowait(int, struct job *); -#ifdef SYSV -STATIC int onsigchild(void); -#endif -STATIC int waitproc(int, int *); -STATIC char *commandtext(union node *); -STATIC void cmdtxt(union node *); -STATIC void cmdlist(union node *, int); -STATIC void cmdputs(const char *); -STATIC void showpipe(struct job *, struct output *); -STATIC int getstatus(struct job *); - -#if JOBS -static int restartjob(struct job *, int); -static void xtcsetpgrp(int, pid_t); -#endif - -STATIC void -set_curjob(struct job *jp, unsigned mode) -{ - struct job *jp1; - struct job **jpp, **curp; - - /* first remove from list */ - jpp = curp = &curjob; - do { - jp1 = *jpp; - if (jp1 == jp) - break; - jpp = &jp1->prev_job; - } while (1); - *jpp = jp1->prev_job; - - /* Then re-insert in correct position */ - jpp = curp; - switch (mode) { - default: -#ifdef DEBUG - abort(); -#endif - case CUR_DELETE: - /* job being deleted */ - break; - case CUR_RUNNING: - /* newly created job or backgrounded job, - put after all stopped jobs. */ - do { - jp1 = *jpp; - if (!JOBS || !jp1 || jp1->state != JOBSTOPPED) - break; - jpp = &jp1->prev_job; - } while (1); - /* FALLTHROUGH */ -#if JOBS - case CUR_STOPPED: -#endif - /* newly stopped job - becomes curjob */ - jp->prev_job = *jpp; - *jpp = jp; - break; - } -} - -#if JOBS -/* - * Turn job control on and off. - * - * Note: This code assumes that the third arg to ioctl is a character - * pointer, which is true on Berkeley systems but not System V. Since - * System V doesn't have job control yet, this isn't a problem now. - * - * Called with interrupts off. - */ - -int jobctl; - -void -setjobctl(int on) -{ - int fd; - int pgrp; - - if (on == jobctl || rootshell == 0) - return; - if (on) { - int ofd; - ofd = fd = open64(_PATH_TTY, O_RDWR); - if (fd < 0) { - fd += 3; - while (!isatty(fd)) - if (--fd < 0) - goto out; - } - fd = savefd(fd, ofd); - do { /* while we are in the background */ - if ((pgrp = tcgetpgrp(fd)) < 0) { -out: - sh_warnx("can't access tty; job control turned off"); - mflag = on = 0; - goto close; - } - if (pgrp == getpgrp()) - break; - killpg(0, SIGTTIN); - } while (1); - initialpgrp = pgrp; - - setsignal(SIGTSTP); - setsignal(SIGTTOU); - setsignal(SIGTTIN); - pgrp = rootpid; - setpgid(0, pgrp); - xtcsetpgrp(fd, pgrp); - } else { - /* turning job control off */ - fd = ttyfd; - pgrp = initialpgrp; - xtcsetpgrp(fd, pgrp); - setpgid(0, pgrp); - setsignal(SIGTSTP); - setsignal(SIGTTOU); - setsignal(SIGTTIN); -close: - close(fd); - fd = -1; - } - ttyfd = fd; - jobctl = on; -} -#endif - - -int -killcmd(argc, argv) - int argc; - char **argv; -{ - extern char *signal_names[]; - int signo = -1; - int list = 0; - int i; - pid_t pid; - struct job *jp; - - if (argc <= 1) { -usage: - sh_error( -"Usage: kill [-s sigspec | -signum | -sigspec] [pid | job]... or\n" -"kill -l [exitstatus]" - ); - } - - if (**++argv == '-') { - signo = decode_signal(*argv + 1, 1); - if (signo < 0) { - int c; - - while ((c = nextopt("ls:")) != '\0') - switch (c) { - default: -#ifdef DEBUG - abort(); -#endif - case 'l': - list = 1; - break; - case 's': - signo = decode_signal(optionarg, 1); - if (signo < 0) { - sh_error( - "invalid signal number or name: %s", - optionarg - ); - } - break; - } - argv = argptr; - } else - argv++; - } - - if (!list && signo < 0) - signo = SIGTERM; - - if ((signo < 0 || !*argv) ^ list) { - goto usage; - } - - if (list) { - struct output *out; - - out = out1; - if (!*argv) { - outstr("0\n", out); - for (i = 1; i < NSIG; i++) { - outfmt(out, snlfmt, signal_names[i]); - } - return 0; - } - signo = number(*argv); - if (signo > 128) - signo -= 128; - if (0 < signo && signo < NSIG) - outfmt(out, snlfmt, signal_names[signo]); - else - sh_error("invalid signal number or exit status: %s", - *argv); - return 0; - } - - i = 0; - do { - if (**argv == '%') { - jp = getjob(*argv, 0); - pid = -jp->ps[0].pid; - } else - pid = **argv == '-' ? - -number(*argv + 1) : number(*argv); - if (kill(pid, signo) != 0) { - sh_warnx("%s\n", strerror(errno)); - i = 1; - } - } while (*++argv); - - return i; -} - -STATIC int -jobno(const struct job *jp) -{ - return jp - jobtab + 1; -} - -#if JOBS -int -fgcmd(int argc, char **argv) -{ - struct job *jp; - struct output *out; - int mode; - int retval; - - mode = (**argv == 'f') ? FORK_FG : FORK_BG; - nextopt(nullstr); - argv = argptr; - out = out1; - do { - jp = getjob(*argv, 1); - if (mode == FORK_BG) { - set_curjob(jp, CUR_RUNNING); - outfmt(out, "[%d] ", jobno(jp)); - } - outstr(jp->ps->cmd, out); - showpipe(jp, out); - retval = restartjob(jp, mode); - } while (*argv && *++argv); - return retval; -} - -int bgcmd(int argc, char **argv) -#ifdef HAVE_ALIAS_ATTRIBUTE - __attribute__((__alias__("fgcmd"))); -#else -{ - return fgcmd(argc, argv); -} -#endif - - -STATIC int -restartjob(struct job *jp, int mode) -{ - struct procstat *ps; - int i; - int status; - pid_t pgid; - - INTOFF; - if (jp->state == JOBDONE) - goto out; - jp->state = JOBRUNNING; - pgid = jp->ps->pid; - if (mode == FORK_FG) - xtcsetpgrp(ttyfd, pgid); - killpg(pgid, SIGCONT); - ps = jp->ps; - i = jp->nprocs; - do { - if (WIFSTOPPED(ps->status)) { - ps->status = -1; - } - } while (ps++, --i); -out: - status = (mode == FORK_FG) ? waitforjob(jp) : 0; - INTON; - return status; -} -#endif - -STATIC int -sprint_status(char *os, int status, int sigonly) -{ - char *s = os; - int st; - - st = WEXITSTATUS(status); - if (!WIFEXITED(status)) { -#if JOBS - st = WSTOPSIG(status); - if (!WIFSTOPPED(status)) -#endif - st = WTERMSIG(status); - if (sigonly) { - if (st == SIGINT || st == SIGPIPE) - goto out; -#if JOBS - if (WIFSTOPPED(status)) - goto out; -#endif - } - s = stpncpy(s, strsignal(st), 32); -#ifdef WCOREDUMP - if (WCOREDUMP(status)) { - s = stpcpy(s, " (core dumped)"); - } -#endif - } else if (!sigonly) { - if (st) - s += fmtstr(s, 16, "Done(%d)", st); - else - s = stpcpy(s, "Done"); - } - -out: - return s - os; -} - -static void -showjob(struct output *out, struct job *jp, int mode) -{ - struct procstat *ps; - struct procstat *psend; - int col; - int indent; - char s[80]; - - ps = jp->ps; - - if (mode & SHOW_PGID) { - /* just output process (group) id of pipeline */ - outfmt(out, "%d\n", ps->pid); - return; - } - - col = fmtstr(s, 16, "[%d] ", jobno(jp)); - indent = col; - - if (jp == curjob) - s[col - 2] = '+'; - else if (curjob && jp == curjob->prev_job) - s[col - 2] = '-'; - - if (mode & SHOW_PID) - col += fmtstr(s + col, 16, "%d ", ps->pid); - - psend = ps + jp->nprocs; - - if (jp->state == JOBRUNNING) { - scopy("Running", s + col); - col += strlen("Running"); - } else { - int status = psend[-1].status; -#if JOBS - if (jp->state == JOBSTOPPED) - status = jp->stopstatus; -#endif - col += sprint_status(s + col, status, 0); - } - - goto start; - - do { - /* for each process */ - col = fmtstr(s, 48, " |\n%*c%d ", indent, ' ', ps->pid) - 3; - -start: - outfmt( - out, "%s%*c%s", - s, 33 - col >= 0 ? 33 - col : 0, ' ', ps->cmd - ); - if (!(mode & SHOW_PID)) { - showpipe(jp, out); - break; - } - if (++ps == psend) { - outcslow('\n', out); - break; - } - } while (1); - - jp->changed = 0; - - if (jp->state == JOBDONE) { - TRACE(("showjob: freeing job %d\n", jobno(jp))); - freejob(jp); - } -} - - -int -jobscmd(int argc, char **argv) -{ - int mode, m; - struct output *out; - - mode = 0; - while ((m = nextopt("lp"))) - if (m == 'l') - mode = SHOW_PID; - else - mode = SHOW_PGID; - - out = out1; - argv = argptr; - if (*argv) - do - showjob(out, getjob(*argv,0), mode); - while (*++argv); - else - showjobs(out, mode); - - return 0; -} - - -/* - * Print a list of jobs. If "change" is nonzero, only print jobs whose - * statuses have changed since the last call to showjobs. - */ - -void -showjobs(struct output *out, int mode) -{ - struct job *jp; - - TRACE(("showjobs(%x) called\n", mode)); - - /* If not even one job changed, there is nothing to do */ - dowait(DOWAIT_NONBLOCK, NULL); - - for (jp = curjob; jp; jp = jp->prev_job) { - if (!(mode & SHOW_CHANGED) || jp->changed) - showjob(out, jp, mode); - } -} - -/* - * Mark a job structure as unused. - */ - -STATIC void -freejob(struct job *jp) -{ - struct procstat *ps; - int i; - - INTOFF; - for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { - if (ps->cmd != nullstr) - ckfree(ps->cmd); - } - if (jp->ps != &jp->ps0) - ckfree(jp->ps); - jp->used = 0; - set_curjob(jp, CUR_DELETE); - INTON; -} - - - -int -waitcmd(int argc, char **argv) -{ - struct job *job; - int retval; - struct job *jp; - - nextopt(nullstr); - retval = 0; - - argv = argptr; - if (!*argv) { - /* wait for all jobs */ - for (;;) { - jp = curjob; - while (1) { - if (!jp) { - /* no running procs */ - goto out; - } - if (jp->state == JOBRUNNING) - break; - jp->waited = 1; - jp = jp->prev_job; - } - if (!dowait(DOWAIT_WAITCMD_ALL, 0)) - goto sigout; - } - } - - retval = 127; - do { - if (**argv != '%') { - pid_t pid = number(*argv); - job = curjob; - goto start; - do { - if (job->ps[job->nprocs - 1].pid == pid) - break; - job = job->prev_job; -start: - if (!job) - goto repeat; - } while (1); - } else - job = getjob(*argv, 0); - /* loop until process terminated or stopped */ - if (!dowait(DOWAIT_WAITCMD, job)) - goto sigout; - job->waited = 1; - retval = getstatus(job); -repeat: - ; - } while (*++argv); - -out: - return retval; - -sigout: - retval = 128 + pending_sig; - goto out; -} - - - -/* - * Convert a job name to a job structure. - */ - -STATIC struct job * -getjob(const char *name, int getctl) -{ - struct job *jp; - struct job *found; - const char *err_msg = "No such job: %s"; - unsigned num; - int c; - const char *p; - char *(*match)(const char *, const char *); - - jp = curjob; - p = name; - if (!p) - goto currentjob; - - if (*p != '%') - goto err; - - c = *++p; - if (!c) - goto currentjob; - - if (!p[1]) { - if (c == '+' || c == '%') { -currentjob: - err_msg = "No current job"; - goto check; - } else if (c == '-') { - if (jp) - jp = jp->prev_job; - err_msg = "No previous job"; -check: - if (!jp) - goto err; - goto gotit; - } - } - - if (is_number(p)) { - num = atoi(p); - if (num > 0 && num <= njobs) { - jp = jobtab + num - 1; - if (jp->used) - goto gotit; - goto err; - } - } - - match = prefix; - if (*p == '?') { - match = strstr; - p++; - } - - found = 0; - while (jp) { - if (match(jp->ps[0].cmd, p)) { - if (found) - goto err; - found = jp; - err_msg = "%s: ambiguous"; - } - jp = jp->prev_job; - } - - if (!found) - goto err; - jp = found; - -gotit: -#if JOBS - err_msg = "job %s not created under job control"; - if (getctl && jp->jobctl == 0) - goto err; -#endif - return jp; -err: - sh_error(err_msg, name); -} - - - -/* - * Return a new job structure. - * Called with interrupts off. - */ - -struct job * -makejob(union node *node, int nprocs) -{ - int i; - struct job *jp; - - for (i = njobs, jp = jobtab ; ; jp++) { - if (--i < 0) { - jp = growjobtab(); - break; - } - if (jp->used == 0) - break; - if (jp->state != JOBDONE || !jp->waited) - continue; - if (jobctl) - continue; - freejob(jp); - break; - } - memset(jp, 0, sizeof(*jp)); -#if JOBS - if (jobctl) - jp->jobctl = 1; -#endif - jp->prev_job = curjob; - curjob = jp; - jp->used = 1; - jp->ps = &jp->ps0; - if (nprocs > 1) { - jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); - } - TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, - jobno(jp))); - return jp; -} - -STATIC struct job * -growjobtab(void) -{ - size_t len; - ptrdiff_t offset; - struct job *jp, *jq; - - len = njobs * sizeof(*jp); - jq = jobtab; - jp = ckrealloc(jq, len + 4 * sizeof(*jp)); - - offset = (char *)jp - (char *)jq; - if (offset) { - /* Relocate pointers */ - size_t l = len; - - jq = (struct job *)((char *)jq + l); - while (l) { - l -= sizeof(*jp); - jq--; -#define joff(p) ((struct job *)((char *)(p) + l)) -#define jmove(p) (p) = (void *)((char *)(p) + offset) - if (likely(joff(jp)->ps == &jq->ps0)) - jmove(joff(jp)->ps); - if (joff(jp)->prev_job) - jmove(joff(jp)->prev_job); - } - if (curjob) - jmove(curjob); -#undef joff -#undef jmove - } - - njobs += 4; - jobtab = jp; - jp = (struct job *)((char *)jp + len); - jq = jp + 3; - do { - jq->used = 0; - } while (--jq >= jp); - return jp; -} - - -/* - * Fork off a subshell. If we are doing job control, give the subshell its - * own process group. Jp is a job structure that the job is to be added to. - * N is the command that will be evaluated by the child. Both jp and n may - * be NULL. The mode parameter can be one of the following: - * FORK_FG - Fork off a foreground process. - * FORK_BG - Fork off a background process. - * FORK_NOJOB - Like FORK_FG, but don't give the process its own - * process group even if job control is on. - * - * When job control is turned off, background processes have their standard - * input redirected to /dev/null (except for the second and later processes - * in a pipeline). - * - * Called with interrupts off. - */ - -static void forkchild(struct job *jp, union node *n, int mode) -{ - int lvforked; - int oldlvl; - - TRACE(("Child shell %d\n", getpid())); - - oldlvl = shlvl; - lvforked = vforked; - - if (!lvforked) { - shlvl++; - - forkreset(); - -#if JOBS - /* do job control only in root shell */ - jobctl = 0; -#endif - } - -#if JOBS - if (mode != FORK_NOJOB && jp->jobctl && !oldlvl) { - pid_t pgrp; - - if (jp->nprocs == 0) - pgrp = getpid(); - else - pgrp = jp->ps[0].pid; - /* This can fail because we are doing it in the parent also */ - (void)setpgid(0, pgrp); - if (mode == FORK_FG) - xtcsetpgrp(ttyfd, pgrp); - setsignal(SIGTSTP); - setsignal(SIGTTOU); - } else -#endif - if (mode == FORK_BG) { - ignoresig(SIGINT); - ignoresig(SIGQUIT); - if (jp->nprocs == 0) { - close(0); - if (open64(_PATH_DEVNULL, O_RDONLY) != 0) - sh_error("Can't open %s", _PATH_DEVNULL); - } - } - if (!oldlvl && iflag) { - if (mode != FORK_BG) { - setsignal(SIGINT); - setsignal(SIGQUIT); - } - setsignal(SIGTERM); - } - - if (lvforked) - return; - - for (jp = curjob; jp; jp = jp->prev_job) - freejob(jp); -} - -static void forkparent(struct job *jp, union node *n, int mode, pid_t pid) -{ - if (pid < 0) { - TRACE(("Fork failed, errno=%d", errno)); - if (jp) - freejob(jp); - sh_error("Cannot fork"); - /* NOTREACHED */ - } - - TRACE(("In parent shell: child = %d\n", pid)); - if (!jp) - return; -#if JOBS - if (mode != FORK_NOJOB && jp->jobctl) { - int pgrp; - - if (jp->nprocs == 0) - pgrp = pid; - else - pgrp = jp->ps[0].pid; - /* This can fail because we are doing it in the child also */ - (void)setpgid(pid, pgrp); - } -#endif - if (mode == FORK_BG) { - backgndpid = pid; /* set $! */ - set_curjob(jp, CUR_RUNNING); - } - if (jp) { - struct procstat *ps = &jp->ps[jp->nprocs++]; - ps->pid = pid; - ps->status = -1; - ps->cmd = nullstr; - if (jobctl && n) - ps->cmd = commandtext(n); - } -} - -int -forkshell(struct job *jp, union node *n, int mode) -{ - int pid; - - TRACE(("forkshell(%%%d, %p, %d) called\n", jobno(jp), n, mode)); - pid = fork(); - if (pid == 0) - forkchild(jp, n, mode); - else - forkparent(jp, n, mode, pid); - - return pid; -} - -struct job *vforkexec(union node *n, char **argv, const char *path, int idx) -{ - struct job *jp; - int pid; - - jp = makejob(n, 1); - - sigblockall(NULL); - vforked++; - - pid = vfork(); - - if (!pid) { - forkchild(jp, n, FORK_FG); - sigclearmask(); - shellexec(argv, path, idx); - /* NOTREACHED */ - } - - vforked = 0; - sigclearmask(); - forkparent(jp, n, FORK_FG, pid); - - return jp; -} - -/* - * Wait for job to finish. - * - * Under job control we have the problem that while a child process is - * running interrupts generated by the user are sent to the child but not - * to the shell. This means that an infinite loop started by an inter- - * active user may be hard to kill. With job control turned off, an - * interactive user may place an interactive program inside a loop. If - * the interactive program catches interrupts, the user doesn't want - * these interrupts to also abort the loop. The approach we take here - * is to have the shell ignore interrupt signals while waiting for a - * forground process to terminate, and then send itself an interrupt - * signal if the child process was terminated by an interrupt signal. - * Unfortunately, some programs want to do a bit of cleanup and then - * exit on interrupt; unless these processes terminate themselves by - * sending a signal to themselves (instead of calling exit) they will - * confuse this approach. - * - * Called with interrupts off. - */ - -int -waitforjob(struct job *jp) -{ - int st; - - TRACE(("waitforjob(%%%d) called\n", jp ? jobno(jp) : 0)); - dowait(jp ? DOWAIT_BLOCK : DOWAIT_NONBLOCK, jp); - if (!jp) - return exitstatus; - - st = getstatus(jp); -#if JOBS - if (jp->jobctl) { - xtcsetpgrp(ttyfd, rootpid); - /* - * This is truly gross. - * If we're doing job control, then we did a TIOCSPGRP which - * caused us (the shell) to no longer be in the controlling - * session -- so we wouldn't have seen any ^C/SIGINT. So, we - * intuit from the subprocess exit status whether a SIGINT - * occurred, and if so interrupt ourselves. Yuck. - mycroft - */ - if (jp->sigint) - raise(SIGINT); - } -#endif - if (! JOBS || jp->state == JOBDONE) - freejob(jp); - return st; -} - - - -/* - * Wait for a process to terminate. - */ - -static int waitone(int block, struct job *job) -{ - int pid; - int status; - struct job *jp; - struct job *thisjob = NULL; - int state; - - INTOFF; - TRACE(("dowait(%d) called\n", block)); - pid = waitproc(block, &status); - TRACE(("wait returns pid %d, status=%d\n", pid, status)); - if (pid <= 0) - goto out; - - for (jp = curjob; jp; jp = jp->prev_job) { - struct procstat *sp; - struct procstat *spend; - if (jp->state == JOBDONE) - continue; - state = JOBDONE; - spend = jp->ps + jp->nprocs; - sp = jp->ps; - do { - if (sp->pid == pid) { - TRACE(("Job %d: changing status of proc %d from 0x%x to 0x%x\n", jobno(jp), pid, sp->status, status)); - sp->status = status; - thisjob = jp; - } - if (sp->status == -1) - state = JOBRUNNING; -#if JOBS - if (state == JOBRUNNING) - continue; - if (WIFSTOPPED(sp->status)) { - jp->stopstatus = sp->status; - state = JOBSTOPPED; - } -#endif - } while (++sp < spend); - if (thisjob) - goto gotjob; - } - goto out; - -gotjob: - if (state != JOBRUNNING) { - thisjob->changed = 1; - - if (thisjob->state != state) { - TRACE(("Job %d: changing state from %d to %d\n", jobno(thisjob), thisjob->state, state)); - thisjob->state = state; -#if JOBS - if (state == JOBSTOPPED) { - set_curjob(thisjob, CUR_STOPPED); - } -#endif - } - } - -out: - INTON; - - if (thisjob && thisjob == job) { - char s[48 + 1]; - int len; - - len = sprint_status(s, status, 1); - if (len) { - s[len] = '\n'; - s[len + 1] = 0; - outstr(s, out2); - } - } - return pid; -} - -static int dowait(int block, struct job *jp) -{ - int gotchld = *(volatile int *)&gotsigchld; - int rpid; - int pid; - - if (jp && jp->state != JOBRUNNING) - block = DOWAIT_NONBLOCK; - - if (block == DOWAIT_NONBLOCK && !gotchld) - return 1; - - rpid = 1; - - do { - pid = waitone(block, jp); - rpid &= !!pid; - - block &= ~DOWAIT_WAITCMD_ALL; - if (!pid || (jp && jp->state != JOBRUNNING)) - block = DOWAIT_NONBLOCK; - } while (pid >= 0); - - return rpid; -} - -/* - * Do a wait system call. If block is zero, we return -1 rather than - * blocking. If block is DOWAIT_WAITCMD, we return 0 when a signal - * other than SIGCHLD interrupted the wait. - * - * We use sigsuspend in conjunction with a non-blocking wait3 in - * order to ensure that waitcmd exits promptly upon the reception - * of a signal. - * - * For code paths other than waitcmd we either use a blocking wait3 - * or a non-blocking wait3. For the latter case the caller of dowait - * must ensure that it is called over and over again until all dead - * children have been reaped. Otherwise zombies may linger. - */ - - -STATIC int -waitproc(int block, int *status) -{ - sigset_t oldmask; - int flags = block == DOWAIT_BLOCK ? 0 : WNOHANG; - int err; - -#if JOBS - if (jobctl) - flags |= WUNTRACED; -#endif - - do { - gotsigchld = 0; - do - err = wait3(status, flags, NULL); - while (err < 0 && errno == EINTR); - - if (err || (err = -!block)) - break; - - sigblockall(&oldmask); - - while (!gotsigchld && !pending_sig) - sigsuspend(&oldmask); - - sigclearmask(); - } while (gotsigchld); - - return err; -} - -/* - * return 1 if there are stopped jobs, otherwise 0 - */ -int job_warning; -int -stoppedjobs(void) -{ - struct job *jp; - int retval; - - retval = 0; - if (job_warning > 1) - goto out; - jp = curjob; - if (jp && jp->state == JOBSTOPPED) { - out2str("You have stopped jobs.\n"); - job_warning++; - retval++; - } - -out: - return retval; -} - -/* - * Return a string identifying a command (to be printed by the - * jobs command). - */ - -STATIC char *cmdnextc; - -STATIC char * -commandtext(union node *n) -{ - char *name; - - STARTSTACKSTR(cmdnextc); - cmdtxt(n); - name = stackblock(); - TRACE(("commandtext: name %p, end %p\n", name, cmdnextc)); - return savestr(name); -} - - -STATIC void -cmdtxt(union node *n) -{ - union node *np; - struct nodelist *lp; - const char *p; - char s[2]; - - if (!n) - return; - switch (n->type) { - default: -#if DEBUG - abort(); -#endif - case NPIPE: - lp = n->npipe.cmdlist; - for (;;) { - cmdtxt(lp->n); - lp = lp->next; - if (!lp) - break; - cmdputs(" | "); - } - break; - case NSEMI: - p = "; "; - goto binop; - case NAND: - p = " && "; - goto binop; - case NOR: - p = " || "; -binop: - cmdtxt(n->nbinary.ch1); - cmdputs(p); - n = n->nbinary.ch2; - goto donode; - case NREDIR: - case NBACKGND: - n = n->nredir.n; - goto donode; - case NNOT: - cmdputs("!"); - n = n->nnot.com; -donode: - cmdtxt(n); - break; - case NIF: - cmdputs("if "); - cmdtxt(n->nif.test); - cmdputs("; then "); - if (n->nif.elsepart) { - cmdtxt(n->nif.ifpart); - cmdputs("; else "); - n = n->nif.elsepart; - } else { - n = n->nif.ifpart; - } - p = "; fi"; - goto dotail; - case NSUBSHELL: - cmdputs("("); - n = n->nredir.n; - p = ")"; - goto dotail; - case NWHILE: - p = "while "; - goto until; - case NUNTIL: - p = "until "; -until: - cmdputs(p); - cmdtxt(n->nbinary.ch1); - n = n->nbinary.ch2; - p = "; done"; -dodo: - cmdputs("; do "); -dotail: - cmdtxt(n); - goto dotail2; - case NFOR: - cmdputs("for "); - cmdputs(n->nfor.var); - cmdputs(" in "); - cmdlist(n->nfor.args, 1); - n = n->nfor.body; - p = "; done"; - goto dodo; - case NDEFUN: - cmdputs(n->ndefun.text); - p = "() { ... }"; - goto dotail2; - case NCMD: - cmdlist(n->ncmd.args, 1); - cmdlist(n->ncmd.redirect, 0); - break; - case NARG: - p = n->narg.text; -dotail2: - cmdputs(p); - break; - case NHERE: - case NXHERE: - p = "<<..."; - goto dotail2; - case NCASE: - cmdputs("case "); - cmdputs(n->ncase.expr->narg.text); - cmdputs(" in "); - for (np = n->ncase.cases; np; np = np->nclist.next) { - cmdtxt(np->nclist.pattern); - cmdputs(") "); - cmdtxt(np->nclist.body); - cmdputs(";; "); - } - p = "esac"; - goto dotail2; - case NTO: - p = ">"; - goto redir; - case NCLOBBER: - p = ">|"; - goto redir; - case NAPPEND: - p = ">>"; - goto redir; - case NTOFD: - p = ">&"; - goto redir; - case NFROM: - p = "<"; - goto redir; - case NFROMFD: - p = "<&"; - goto redir; - case NFROMTO: - p = "<>"; -redir: - s[0] = n->nfile.fd + '0'; - s[1] = '\0'; - cmdputs(s); - cmdputs(p); - if (n->type == NTOFD || n->type == NFROMFD) { - s[0] = n->ndup.dupfd + '0'; - p = s; - goto dotail2; - } else { - n = n->nfile.fname; - goto donode; - } - } -} - -STATIC void -cmdlist(union node *np, int sep) -{ - for (; np; np = np->narg.next) { - if (!sep) - cmdputs(spcstr); - cmdtxt(np); - if (sep && np->narg.next) - cmdputs(spcstr); - } -} - - -STATIC void -cmdputs(const char *s) -{ - const char *p, *str; - char cc[2] = " "; - char *nextc; - signed char c; - int subtype = 0; - int quoted = 0; - static const char vstype[VSTYPE + 1][4] = { - "", "}", "-", "+", "?", "=", - "%", "%%", "#", "##", - }; - - nextc = makestrspace((strlen(s) + 1) * 8, cmdnextc); - p = s; - while ((c = *p++) != 0) { - str = 0; - switch (c) { - case CTLESC: - c = *p++; - break; - case CTLVAR: - subtype = *p++; - if ((subtype & VSTYPE) == VSLENGTH) - str = "${#"; - else - str = "${"; - goto dostr; - case CTLENDVAR: - str = "\"}"; - str += !(quoted & 1); - quoted >>= 1; - subtype = 0; - goto dostr; - case CTLBACKQ: - str = "$(...)"; - goto dostr; - case CTLARI: - str = "$(("; - goto dostr; - case CTLENDARI: - str = "))"; - goto dostr; - case CTLQUOTEMARK: - quoted ^= 1; - c = '"'; - break; - case '=': - if (subtype == 0) - break; - if ((subtype & VSTYPE) != VSNORMAL) - quoted <<= 1; - str = vstype[subtype & VSTYPE]; - if (subtype & VSNUL) - c = ':'; - else - goto checkstr; - break; - case '\'': - case '\\': - case '"': - case '$': - /* These can only happen inside quotes */ - cc[0] = c; - str = cc; - c = '\\'; - break; - default: - break; - } - USTPUTC(c, nextc); -checkstr: - if (!str) - continue; -dostr: - while ((c = *str++)) { - USTPUTC(c, nextc); - } - } - if (quoted & 1) { - USTPUTC('"', nextc); - } - *nextc = 0; - cmdnextc = nextc; -} - - -STATIC void -showpipe(struct job *jp, struct output *out) -{ - struct procstat *sp; - struct procstat *spend; - - spend = jp->ps + jp->nprocs; - for (sp = jp->ps + 1; sp < spend; sp++) - outfmt(out, " | %s", sp->cmd); - outcslow('\n', out); - flushall(); -} - - -#if JOBS -STATIC void -xtcsetpgrp(int fd, pid_t pgrp) -{ - if (tcsetpgrp(fd, pgrp)) - sh_error("Cannot set tty process group (%s)", strerror(errno)); -} -#endif - - -STATIC int -getstatus(struct job *job) { - int status; - int retval; - - status = job->ps[job->nprocs - 1].status; - retval = WEXITSTATUS(status); - if (!WIFEXITED(status)) { -#if JOBS - retval = WSTOPSIG(status); - if (!WIFSTOPPED(status)) -#endif - { - /* XXX: limits number of signals */ - retval = WTERMSIG(status); -#if JOBS - if (retval == SIGINT) - job->sigint = 1; -#endif - } - retval += 128; - } - TRACE(("getstatus: job %d, nproc %d, status %x, retval %x\n", - jobno(job), job->nprocs, status, retval)); - return retval; -} diff --git a/bin/dash/src/jobs.h b/bin/dash/src/jobs.h deleted file mode 100644 index 6ac6c56d..00000000 --- a/bin/dash/src/jobs.h +++ /dev/null @@ -1,113 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)jobs.h 8.2 (Berkeley) 5/4/95 - */ - -#include <inttypes.h> -#include <sys/types.h> - -/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */ -#define FORK_FG 0 -#define FORK_BG 1 -#define FORK_NOJOB 2 - -/* mode flags for showjob(s) */ -#define SHOW_PGID 0x01 /* only show pgid - for jobs -p */ -#define SHOW_PID 0x04 /* include process pid */ -#define SHOW_CHANGED 0x08 /* only jobs whose state has changed */ - - -/* - * A job structure contains information about a job. A job is either a - * single process or a set of processes contained in a pipeline. In the - * latter case, pidlist will be non-NULL, and will point to a -1 terminated - * array of pids. - */ - -struct procstat { - pid_t pid; /* process id */ - int status; /* last process status from wait() */ - char *cmd; /* text of command being run */ -}; - -struct job { - struct procstat ps0; /* status of process */ - struct procstat *ps; /* status or processes when more than one */ -#if JOBS - int stopstatus; /* status of a stopped job */ -#endif - uint32_t - nprocs: 16, /* number of processes */ - state: 8, -#define JOBRUNNING 0 /* at least one proc running */ -#define JOBSTOPPED 1 /* all procs are stopped */ -#define JOBDONE 2 /* all procs are completed */ -#if JOBS - sigint: 1, /* job was killed by SIGINT */ - jobctl: 1, /* job running under job control */ -#endif - waited: 1, /* true if this entry has been waited for */ - used: 1, /* true if this entry is in used */ - changed: 1; /* true if status has changed */ - struct job *prev_job; /* previous job */ -}; - -union node; - -extern pid_t backgndpid; /* pid of last background process */ -extern int job_warning; /* user was warned about stopped jobs */ -#if JOBS -extern int jobctl; /* true if doing job control */ -#else -#define jobctl 0 -#endif -extern int vforked; /* Set if we are in the vforked child */ - -void setjobctl(int); -int killcmd(int, char **); -int fgcmd(int, char **); -int bgcmd(int, char **); -int jobscmd(int, char **); -struct output; -void showjobs(struct output *, int); -int waitcmd(int, char **); -struct job *makejob(union node *, int); -int forkshell(struct job *, union node *, int); -struct job *vforkexec(union node *n, char **argv, const char *path, int idx); -int waitforjob(struct job *); -int stoppedjobs(void); - -#if ! JOBS -#define setjobctl(on) ((void)(on)) /* do nothing */ -#endif diff --git a/bin/dash/src/machdep.h b/bin/dash/src/machdep.h deleted file mode 100644 index f2ff0ad8..00000000 --- a/bin/dash/src/machdep.h +++ /dev/null @@ -1,47 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)machdep.h 8.2 (Berkeley) 5/4/95 - */ - -/* - * Most machines require the value returned from malloc to be aligned - * in some way. The following macro will get this right on many machines. - */ - -#define SHELL_SIZE (sizeof(union {int i; char *cp; double d; }) - 1) -/* - * It appears that grabstackstr() will barf with such alignments - * because stalloc() will return a string allocated in a new stackblock. - */ -#define SHELL_ALIGN(nbytes) (((nbytes) + SHELL_SIZE) & ~SHELL_SIZE) diff --git a/bin/dash/src/mail.c b/bin/dash/src/mail.c deleted file mode 100644 index a6571538..00000000 --- a/bin/dash/src/mail.c +++ /dev/null @@ -1,112 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Routines to check for mail. (Perhaps make part of main.c?) - */ -#include <sys/types.h> -#include <sys/stat.h> -#include <stdlib.h> -#include <string.h> - -#include "shell.h" -#include "nodes.h" -#include "exec.h" /* defines padvance() */ -#include "var.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "mail.h" -#include "mystring.h" - - -#define MAXMBOXES 10 - -/* sizes of mailboxes */ -static off_t mailsize[MAXMBOXES]; - - - -/* - * Print appropriate message(s) if mail has arrived. - */ - -void -chkmail(void) -{ - const char *mpath; - char *p; - char *q; - off_t *msp; - struct stackmark smark; - struct stat64 statb; - - setstackmark(&smark); - mpath = mpathset() ? mpathval() : mailval(); - for (msp = mailsize; msp < mailsize + MAXMBOXES; msp++) { - int len; - - len = padvance_magic(&mpath, nullstr, 2); - if (len == -1) - break; - p = stackblock(); - if (*p == '\0') - continue; - for (q = p ; *q ; q++); -#ifdef DEBUG - if (q[-1] != '/') - abort(); -#endif - q[-1] = '\0'; /* delete trailing '/' */ - if (stat64(p, &statb) < 0) { - *msp = 0; - continue; - } - if (statb.st_size > *msp) { - outfmt( - &errout, snlfmt, - pathopt ? pathopt : "you have mail" - ); - } - *msp = statb.st_size; - } - popstackmark(&smark); -} - - -void -changemail(const char *val) -{ - memset(mailsize, 0, sizeof(mailsize)); -} diff --git a/bin/dash/src/mail.h b/bin/dash/src/mail.h deleted file mode 100644 index 3c6b21d2..00000000 --- a/bin/dash/src/mail.h +++ /dev/null @@ -1,38 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)mail.h 8.2 (Berkeley) 5/4/95 - */ - -void chkmail(void); -void changemail(const char *); diff --git a/bin/dash/src/main.c b/bin/dash/src/main.c deleted file mode 100644 index 7a285346..00000000 --- a/bin/dash/src/main.c +++ /dev/null @@ -1,363 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <stdio.h> -#include <signal.h> -#include <sys/stat.h> -#include <unistd.h> -#include <fcntl.h> - - -#include "shell.h" -#include "main.h" -#include "mail.h" -#include "options.h" -#include "output.h" -#include "parser.h" -#include "nodes.h" -#include "expand.h" -#include "eval.h" -#include "jobs.h" -#include "input.h" -#include "trap.h" -#include "var.h" -#include "show.h" -#include "memalloc.h" -#include "error.h" -#include "init.h" -#include "mystring.h" -#include "exec.h" -#include "cd.h" - -#define PROFILE 0 - -int rootpid; -int shlvl; -#ifdef __GLIBC__ -int *dash_errno; -#endif -#if PROFILE -short profile_buf[16384]; -extern int etext(); -#endif -MKINIT struct jmploc main_handler; - -STATIC void read_profile(const char *); -STATIC char *find_dot_file(char *); -static int cmdloop(int); -int main(int, char **); - -/* - * Main routine. We initialize things, parse the arguments, execute - * profiles if we're a login shell, and then call cmdloop to execute - * commands. The setjmp call sets up the location to jump to when an - * exception occurs. When an exception occurs the variable "state" - * is used to figure out how far we had gotten. - */ - -int -main(int argc, char **argv) -{ - char *shinit; - volatile int state; - struct stackmark smark; - int login; - -#ifdef __GLIBC__ - dash_errno = __errno_location(); -#endif - -#if PROFILE - monitor(4, etext, profile_buf, sizeof profile_buf, 50); -#endif - state = 0; - if (unlikely(setjmp(main_handler.loc))) { - int e; - int s; - - exitreset(); - - e = exception; - - s = state; - if (e == EXEND || e == EXEXIT || s == 0 || iflag == 0 || shlvl) - exitshell(); - - reset(); - - if (e == EXINT -#if ATTY - && (! attyset() || equal(termval(), "emacs")) -#endif - ) { - out2c('\n'); -#ifdef FLUSHERR - flushout(out2); -#endif - } - popstackmark(&smark); - FORCEINTON; /* enable interrupts */ - if (s == 1) - goto state1; - else if (s == 2) - goto state2; - else if (s == 3) - goto state3; - else - goto state4; - } - handler = &main_handler; -#ifdef DEBUG - opentrace(); - trputs("Shell args: "); trargs(argv); -#endif - rootpid = getpid(); - init(); - setstackmark(&smark); - login = procargs(argc, argv); - if (login) { - state = 1; - read_profile("/etc/profile"); -state1: - state = 2; - read_profile("$HOME/.profile"); - } -state2: - state = 3; - if ( -#ifndef linux - getuid() == geteuid() && getgid() == getegid() && -#endif - iflag - ) { - if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') { - read_profile(shinit); - } - } - popstackmark(&smark); -state3: - state = 4; - if (minusc) - evalstring(minusc, sflag ? 0 : EV_EXIT); - - if (sflag || minusc == NULL) { -state4: /* XXX ??? - why isn't this before the "if" statement */ - cmdloop(1); - } -#if PROFILE - monitor(0); -#endif -#if GPROF - { - extern void _mcleanup(void); - _mcleanup(); - } -#endif - exitshell(); - /* NOTREACHED */ -} - - -/* - * Read and execute commands. "Top" is nonzero for the top level command - * loop; it turns on prompting if the shell is interactive. - */ - -static int -cmdloop(int top) -{ - union node *n; - struct stackmark smark; - int inter; - int status = 0; - int numeof = 0; - - TRACE(("cmdloop(%d) called\n", top)); - for (;;) { - int skip; - - setstackmark(&smark); - if (jobctl) - showjobs(out2, SHOW_CHANGED); - inter = 0; - if (iflag && top) { - inter++; - chkmail(); - } - n = parsecmd(inter); - /* showtree(n); DEBUG */ - if (n == NEOF) { - if (!top || numeof >= 50) - break; - if (!stoppedjobs()) { - if (!Iflag) { - if (iflag) { - out2c('\n'); -#ifdef FLUSHERR - flushout(out2); -#endif - } - break; - } - out2str("\nUse \"exit\" to leave shell.\n"); - } - numeof++; - } else if (nflag == 0) { - int i; - - job_warning = (job_warning == 2) ? 1 : 0; - numeof = 0; - i = evaltree(n, 0); - if (n) - status = i; - } - popstackmark(&smark); - - skip = evalskip; - if (skip) { - evalskip &= ~(SKIPFUNC | SKIPFUNCDEF); - break; - } - } - - return status; -} - - - -/* - * Read /etc/profile or .profile. Return on error. - */ - -STATIC void -read_profile(const char *name) -{ - name = expandstr(name); - if (setinputfile(name, INPUT_PUSH_FILE | INPUT_NOFILE_OK) < 0) - return; - - cmdloop(0); - popfile(); -} - - - -/* - * Read a file containing shell functions. - */ - -void -readcmdfile(char *name) -{ - setinputfile(name, INPUT_PUSH_FILE); - cmdloop(0); - popfile(); -} - - - -/* - * Take commands from a file. To be compatible we should do a path - * search for the file, which is necessary to find sub-commands. - */ - - -STATIC char * -find_dot_file(char *basename) -{ - char *fullname; - const char *path = pathval(); - struct stat64 statb; - int len; - - /* don't try this for absolute or relative paths */ - if (strchr(basename, '/')) - return basename; - - while ((len = padvance(&path, basename)) >= 0) { - fullname = stackblock(); - if ((!pathopt || *pathopt == 'f') && - !stat64(fullname, &statb) && S_ISREG(statb.st_mode)) { - /* This will be freed by the caller. */ - return stalloc(len); - } - } - - /* not found in the PATH */ - sh_error("%s: not found", basename); - /* NOTREACHED */ -} - -int -dotcmd(int argc, char **argv) -{ - int status = 0; - - nextopt(nullstr); - argv = argptr; - - if (*argv) { - char *fullname; - - fullname = find_dot_file(*argv); - setinputfile(fullname, INPUT_PUSH_FILE); - commandname = fullname; - status = cmdloop(0); - popfile(); - } - - return status; -} - - -int -exitcmd(int argc, char **argv) -{ - if (stoppedjobs()) - return 0; - - if (argc > 1) - savestatus = number(argv[1]); - - exraise(EXEXIT); - /* NOTREACHED */ -} - -#ifdef mkinit -INCLUDE "error.h" - -FORKRESET { - handler = &main_handler; -} -#endif diff --git a/bin/dash/src/main.h b/bin/dash/src/main.h deleted file mode 100644 index 19e49835..00000000 --- a/bin/dash/src/main.h +++ /dev/null @@ -1,54 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)main.h 8.2 (Berkeley) 5/4/95 - */ - -#include <errno.h> - -/* pid of main shell */ -extern int rootpid; -/* shell level: 0 for the main shell, 1 for its children, and so on */ -extern int shlvl; -#define rootshell (!shlvl) - -#ifdef __GLIBC__ -/* glibc sucks */ -extern int *dash_errno; -#undef errno -#define errno (*dash_errno) -#endif - -void readcmdfile(char *); -int dotcmd(int, char **); -int exitcmd(int, char **); diff --git a/bin/dash/src/memalloc.c b/bin/dash/src/memalloc.c deleted file mode 100644 index 60637da1..00000000 --- a/bin/dash/src/memalloc.c +++ /dev/null @@ -1,300 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <stdlib.h> -#include <unistd.h> - -#include "shell.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "machdep.h" -#include "mystring.h" -#include "system.h" - -/* - * Like malloc, but returns an error when out of space. - */ - -pointer -ckmalloc(size_t nbytes) -{ - pointer p; - - p = malloc(nbytes); - if (p == NULL) - sh_error("Out of space"); - return p; -} - - -/* - * Same for realloc. - */ - -pointer -ckrealloc(pointer p, size_t nbytes) -{ - p = realloc(p, nbytes); - if (p == NULL) - sh_error("Out of space"); - return p; -} - - -/* - * Make a copy of a string in safe storage. - */ - -char * -savestr(const char *s) -{ - char *p = strdup(s); - if (!p) - sh_error("Out of space"); - return p; -} - - -/* - * Parse trees for commands are allocated in lifo order, so we use a stack - * to make this more efficient, and also to avoid all sorts of exception - * handling code to handle interrupts in the middle of a parse. - * - * The size 504 was chosen because the Ultrix malloc handles that size - * well. - */ - -/* minimum size of a block */ -#define MINSIZE SHELL_ALIGN(504) - -struct stack_block { - struct stack_block *prev; - char space[MINSIZE]; -}; - -struct stack_block stackbase; -struct stack_block *stackp = &stackbase; -char *stacknxt = stackbase.space; -size_t stacknleft = MINSIZE; -char *sstrend = stackbase.space + MINSIZE; - -pointer -stalloc(size_t nbytes) -{ - char *p; - size_t aligned; - - aligned = SHELL_ALIGN(nbytes); - if (aligned > stacknleft) { - size_t len; - size_t blocksize; - struct stack_block *sp; - - blocksize = aligned; - if (blocksize < MINSIZE) - blocksize = MINSIZE; - len = sizeof(struct stack_block) - MINSIZE + blocksize; - if (len < blocksize) - sh_error("Out of space"); - INTOFF; - sp = ckmalloc(len); - sp->prev = stackp; - stacknxt = sp->space; - stacknleft = blocksize; - sstrend = stacknxt + blocksize; - stackp = sp; - INTON; - } - p = stacknxt; - stacknxt += aligned; - stacknleft -= aligned; - return p; -} - - -void -stunalloc(pointer p) -{ -#ifdef DEBUG - if (!p || (stacknxt < (char *)p) || ((char *)p < stackp->space)) { - write(2, "stunalloc\n", 10); - abort(); - } -#endif - stacknleft += stacknxt - (char *)p; - stacknxt = p; -} - - - -void pushstackmark(struct stackmark *mark, size_t len) -{ - mark->stackp = stackp; - mark->stacknxt = stacknxt; - mark->stacknleft = stacknleft; - grabstackblock(len); -} - -void setstackmark(struct stackmark *mark) -{ - pushstackmark(mark, stacknxt == stackp->space && stackp != &stackbase); -} - - -void -popstackmark(struct stackmark *mark) -{ - struct stack_block *sp; - - INTOFF; - while (stackp != mark->stackp) { - sp = stackp; - stackp = sp->prev; - ckfree(sp); - } - stacknxt = mark->stacknxt; - stacknleft = mark->stacknleft; - sstrend = mark->stacknxt + mark->stacknleft; - INTON; -} - - -/* - * When the parser reads in a string, it wants to stick the string on the - * stack and only adjust the stack pointer when it knows how big the - * string is. Stackblock (defined in stack.h) returns a pointer to a block - * of space on top of the stack and stackblocklen returns the length of - * this block. Growstackblock will grow this space by at least one byte, - * possibly moving it (like realloc). Grabstackblock actually allocates the - * part of the block that has been used. - */ - -static void growstackblock(size_t min) -{ - size_t newlen; - - newlen = stacknleft * 2; - if (newlen < stacknleft) - sh_error("Out of space"); - min = SHELL_ALIGN(min | 128); - if (newlen < min) - newlen += min; - - if (stacknxt == stackp->space && stackp != &stackbase) { - struct stack_block *sp; - struct stack_block *prevstackp; - size_t grosslen; - - INTOFF; - sp = stackp; - prevstackp = sp->prev; - grosslen = newlen + sizeof(struct stack_block) - MINSIZE; - sp = ckrealloc((pointer)sp, grosslen); - sp->prev = prevstackp; - stackp = sp; - stacknxt = sp->space; - stacknleft = newlen; - sstrend = sp->space + newlen; - INTON; - } else { - char *oldspace = stacknxt; - int oldlen = stacknleft; - char *p = stalloc(newlen); - - /* free the space we just allocated */ - stacknxt = memcpy(p, oldspace, oldlen); - stacknleft += newlen; - } -} - -/* - * The following routines are somewhat easier to use than the above. - * The user declares a variable of type STACKSTR, which may be declared - * to be a register. The macro STARTSTACKSTR initializes things. Then - * the user uses the macro STPUTC to add characters to the string. In - * effect, STPUTC(c, p) is the same as *p++ = c except that the stack is - * grown as necessary. When the user is done, she can just leave the - * string there and refer to it using stackblock(). Or she can allocate - * the space for it using grabstackstr(). If it is necessary to allow - * someone else to use the stack temporarily and then continue to grow - * the string, the user should use grabstack to allocate the space, and - * then call ungrabstr(p) to return to the previous mode of operation. - * - * USTPUTC is like STPUTC except that it doesn't check for overflow. - * CHECKSTACKSPACE can be called before USTPUTC to ensure that there - * is space for at least one character. - */ - -void * -growstackstr(void) -{ - size_t len = stackblocksize(); - - growstackblock(0); - return stackblock() + len; -} - -char *growstackto(size_t len) -{ - if (stackblocksize() < len) - growstackblock(len); - return stackblock(); -} - -/* - * Called from CHECKSTRSPACE. - */ - -char * -makestrspace(size_t newlen, char *p) -{ - size_t len = p - stacknxt; - - return growstackto(len + newlen) + len; -} - -char * -stnputs(const char *s, size_t n, char *p) -{ - p = makestrspace(n, p); - p = mempcpy(p, s, n); - return p; -} - -char * -stputs(const char *s, char *p) -{ - return stnputs(s, strlen(s), p); -} diff --git a/bin/dash/src/memalloc.h b/bin/dash/src/memalloc.h deleted file mode 100644 index b9adf764..00000000 --- a/bin/dash/src/memalloc.h +++ /dev/null @@ -1,101 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)memalloc.h 8.2 (Berkeley) 5/4/95 - */ - -#include <stddef.h> -#include <stdlib.h> - -struct stackmark { - struct stack_block *stackp; - char *stacknxt; - size_t stacknleft; -}; - - -extern char *stacknxt; -extern size_t stacknleft; -extern char *sstrend; - -pointer ckmalloc(size_t); -pointer ckrealloc(pointer, size_t); -char *savestr(const char *); -pointer stalloc(size_t); -void stunalloc(pointer); -void pushstackmark(struct stackmark *mark, size_t len); -void setstackmark(struct stackmark *); -void popstackmark(struct stackmark *); -void *growstackstr(void); -char *growstackto(size_t len); -char *makestrspace(size_t, char *); -char *stnputs(const char *, size_t, char *); -char *stputs(const char *, char *); - - -static inline void grabstackblock(size_t len) -{ - stalloc(len); -} - -static inline char *_STPUTC(int c, char *p) { - if (p == sstrend) - p = growstackstr(); - *p++ = c; - return p; -} - -#define stackblock() ((void *)stacknxt) -#define stackblocksize() stacknleft -#define STARTSTACKSTR(p) ((p) = stackblock()) -#define STPUTC(c, p) ((p) = _STPUTC((c), (p))) -#define CHECKSTRSPACE(n, p) \ - ({ \ - char *q = (p); \ - size_t l = (n); \ - size_t m = sstrend - q; \ - if (l > m) \ - (p) = makestrspace(l, q); \ - 0; \ - }) -#define USTPUTC(c, p) (*p++ = (c)) -#define STACKSTRNUL(p) ((p) == sstrend? (p = growstackstr(), *p = '\0') : (*p = '\0')) -#define STUNPUTC(p) (--p) -#define STTOPC(p) p[-1] -#define STADJUST(amount, p) (p += (amount)) - -#define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock()) -#define ungrabstackstr(s, p) stunalloc((s)) -#define stackstrend() ((void *)sstrend) - -#define ckfree(p) free((pointer)(p)) diff --git a/bin/dash/src/miscbltin.c b/bin/dash/src/miscbltin.c deleted file mode 100644 index 5ccbbcb8..00000000 --- a/bin/dash/src/miscbltin.c +++ /dev/null @@ -1,506 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Miscelaneous builtins. - */ - -#include <sys/types.h> /* quad_t */ -#include <sys/param.h> /* BSD4_4 */ -#include <sys/stat.h> -#include <sys/time.h> -#include <sys/resource.h> -#include <unistd.h> -#include <stdlib.h> -#include <ctype.h> -#include <inttypes.h> - -#include "shell.h" -#include "options.h" -#include "var.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "miscbltin.h" -#include "mystring.h" -#include "main.h" -#include "expand.h" -#include "parser.h" -#include "trap.h" - -#undef rflag - - -/** handle one line of the read command. - * more fields than variables -> remainder shall be part of last variable. - * less fields than variables -> remaining variables unset. - * - * @param line complete line of input - * @param ac argument count - * @param ap argument (variable) list - * @param len length of line including trailing '\0' - */ -static void -readcmd_handle_line(char *s, int ac, char **ap) -{ - struct arglist arglist; - struct strlist *sl; - - s = grabstackstr(s); - - arglist.lastp = &arglist.list; - - ifsbreakup(s, ac, &arglist); - *arglist.lastp = NULL; - ifsfree(); - - sl = arglist.list; - - do { - if (!sl) { - /* nullify remaining arguments */ - do { - setvar(*ap, nullstr, 0); - } while (*++ap); - - return; - } - - /* set variable to field */ - rmescapes(sl->text); - setvar(*ap, sl->text, 0); - sl = sl->next; - } while (*++ap); -} - -/* - * The read builtin. The -e option causes backslashes to escape the - * following character. The -p option followed by an argument prompts - * with the argument. - * - * This uses unbuffered input, which may be avoidable in some cases. - */ - -int -readcmd(int argc, char **argv) -{ - char **ap; - char c; - int rflag; - char *prompt; - char *p; - int startloc; - int newloc; - int status; - int i; - - rflag = 0; - prompt = NULL; - while ((i = nextopt("p:r")) != '\0') { - if (i == 'p') - prompt = optionarg; - else - rflag = 1; - } - if (prompt && isatty(0)) { - out2str(prompt); -#ifdef FLUSHERR - flushall(); -#endif - } - if (*(ap = argptr) == NULL) - sh_error("arg count"); - - status = 0; - STARTSTACKSTR(p); - - goto start; - - for (;;) { - switch (read(0, &c, 1)) { - case 1: - break; - default: - if (errno == EINTR && !pending_sig) - continue; - /* fall through */ - case 0: - status = 1; - goto out; - } - if (c == '\0') - continue; - if (newloc >= startloc) { - if (c == '\n') - goto resetbs; - goto put; - } - if (!rflag && c == '\\') { - newloc = p - (char *)stackblock(); - continue; - } - if (c == '\n') - break; -put: - CHECKSTRSPACE(2, p); - if (strchr(qchars, c)) - USTPUTC(CTLESC, p); - USTPUTC(c, p); - - if (newloc >= startloc) { -resetbs: - recordregion(startloc, newloc, 0); -start: - startloc = p - (char *)stackblock(); - newloc = startloc - 1; - } - } -out: - recordregion(startloc, p - (char *)stackblock(), 0); - STACKSTRNUL(p); - readcmd_handle_line(p + 1, argc - (ap - argv), ap); - return status; -} - - - -/* - * umask builtin - * - * This code was ripped from pdksh 5.2.14 and hacked for use with - * dash by Herbert Xu. - * - * Public domain. - */ - -int -umaskcmd(int argc, char **argv) -{ - char *ap; - int mask; - int i; - int symbolic_mode = 0; - - while ((i = nextopt("S")) != '\0') { - symbolic_mode = 1; - } - - INTOFF; - mask = umask(0); - umask(mask); - INTON; - - if ((ap = *argptr) == NULL) { - if (symbolic_mode) { - char buf[18]; - int j; - - mask = ~mask; - ap = buf; - for (i = 0; i < 3; i++) { - *ap++ = "ugo"[i]; - *ap++ = '='; - for (j = 0; j < 3; j++) - if (mask & (1 << (8 - (3*i + j)))) - *ap++ = "rwx"[j]; - *ap++ = ','; - } - ap[-1] = '\0'; - out1fmt("%s\n", buf); - } else { - out1fmt("%.4o\n", mask); - } - } else { - int new_mask; - - if (isdigit((unsigned char) *ap)) { - new_mask = 0; - do { - if (*ap >= '8' || *ap < '0') - sh_error(illnum, *argptr); - new_mask = (new_mask << 3) + (*ap - '0'); - } while (*++ap != '\0'); - } else { - int positions, new_val; - char op; - - mask = ~mask; - new_mask = mask; - positions = 0; - while (*ap) { - while (*ap && strchr("augo", *ap)) - switch (*ap++) { - case 'a': positions |= 0111; break; - case 'u': positions |= 0100; break; - case 'g': positions |= 0010; break; - case 'o': positions |= 0001; break; - } - if (!positions) - positions = 0111; /* default is a */ - if (!strchr("=+-", op = *ap)) - break; - ap++; - new_val = 0; - while (*ap && strchr("rwxugoXs", *ap)) - switch (*ap++) { - case 'r': new_val |= 04; break; - case 'w': new_val |= 02; break; - case 'x': new_val |= 01; break; - case 'u': new_val |= mask >> 6; - break; - case 'g': new_val |= mask >> 3; - break; - case 'o': new_val |= mask >> 0; - break; - case 'X': if (mask & 0111) - new_val |= 01; - break; - case 's': /* ignored */ - break; - } - new_val = (new_val & 07) * positions; - switch (op) { - case '-': - new_mask &= ~new_val; - break; - case '=': - new_mask = new_val - | (new_mask & ~(positions * 07)); - break; - case '+': - new_mask |= new_val; - } - if (*ap == ',') { - positions = 0; - ap++; - } else if (!strchr("=+-", *ap)) - break; - } - if (*ap) { - sh_error("Illegal mode: %s", *argptr); - return 1; - } - new_mask = ~new_mask; - } - umask(new_mask); - } - return 0; -} - -#ifdef HAVE_GETRLIMIT -/* - * ulimit builtin - * - * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and - * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with - * ash by J.T. Conklin. - * - * Public domain. - */ - -struct limits { - const char *name; - int cmd; - int factor; /* multiply by to get rlim_{cur,max} values */ - char option; -}; - -static const struct limits limits[] = { -#ifdef RLIMIT_CPU - { "time(seconds)", RLIMIT_CPU, 1, 't' }, -#endif -#ifdef RLIMIT_FSIZE - { "file(blocks)", RLIMIT_FSIZE, 512, 'f' }, -#endif -#ifdef RLIMIT_DATA - { "data(kbytes)", RLIMIT_DATA, 1024, 'd' }, -#endif -#ifdef RLIMIT_STACK - { "stack(kbytes)", RLIMIT_STACK, 1024, 's' }, -#endif -#ifdef RLIMIT_CORE - { "coredump(blocks)", RLIMIT_CORE, 512, 'c' }, -#endif -#ifdef RLIMIT_RSS - { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' }, -#endif -#ifdef RLIMIT_MEMLOCK - { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' }, -#endif -#ifdef RLIMIT_NPROC - { "process", RLIMIT_NPROC, 1, 'p' }, -#endif -#ifdef RLIMIT_NOFILE - { "nofiles", RLIMIT_NOFILE, 1, 'n' }, -#endif -#ifdef RLIMIT_AS - { "vmemory(kbytes)", RLIMIT_AS, 1024, 'v' }, -#endif -#ifdef RLIMIT_LOCKS - { "locks", RLIMIT_LOCKS, 1, 'w' }, -#endif -#ifdef RLIMIT_RTPRIO - { "rtprio", RLIMIT_RTPRIO, 1, 'r' }, -#endif - { (char *) 0, 0, 0, '\0' } -}; - -enum limtype { SOFT = 0x1, HARD = 0x2 }; - -static void printlim(enum limtype how, const struct rlimit *limit, - const struct limits *l) -{ - rlim_t val; - - val = limit->rlim_max; - if (how & SOFT) - val = limit->rlim_cur; - - if (val == RLIM_INFINITY) - out1fmt("unlimited\n"); - else { - val /= l->factor; - out1fmt("%" PRIdMAX "\n", (intmax_t) val); - } -} - -int -ulimitcmd(int argc, char **argv) -{ - int c; - rlim_t val = 0; - enum limtype how = SOFT | HARD; - const struct limits *l; - int set, all = 0; - int optc, what; - struct rlimit limit; - - what = 'f'; - while ((optc = nextopt("HSa" -#ifdef RLIMIT_CPU - "t" -#endif -#ifdef RLIMIT_FSIZE - "f" -#endif -#ifdef RLIMIT_DATA - "d" -#endif -#ifdef RLIMIT_STACK - "s" -#endif -#ifdef RLIMIT_CORE - "c" -#endif -#ifdef RLIMIT_RSS - "m" -#endif -#ifdef RLIMIT_MEMLOCK - "l" -#endif -#ifdef RLIMIT_NPROC - "p" -#endif -#ifdef RLIMIT_NOFILE - "n" -#endif -#ifdef RLIMIT_AS - "v" -#endif -#ifdef RLIMIT_LOCKS - "w" -#endif - )) != '\0') - switch (optc) { - case 'H': - how = HARD; - break; - case 'S': - how = SOFT; - break; - case 'a': - all = 1; - break; - default: - what = optc; - } - - for (l = limits; l->option != what; l++) - ; - - set = *argptr ? 1 : 0; - if (set) { - char *p = *argptr; - - if (all || argptr[1]) - sh_error("too many arguments"); - if (strcmp(p, "unlimited") == 0) - val = RLIM_INFINITY; - else { - val = (rlim_t) 0; - - while ((c = *p++) >= '0' && c <= '9') - { - val = (val * 10) + (long)(c - '0'); - if (val < (rlim_t) 0) - break; - } - if (c) - sh_error("bad number"); - val *= l->factor; - } - } - if (all) { - for (l = limits; l->name; l++) { - getrlimit(l->cmd, &limit); - out1fmt("%-20s ", l->name); - printlim(how, &limit, l); - } - return 0; - } - - getrlimit(l->cmd, &limit); - if (set) { - if (how & HARD) - limit.rlim_max = val; - if (how & SOFT) - limit.rlim_cur = val; - if (setrlimit(l->cmd, &limit) < 0) - sh_error("error setting limit (%s)", strerror(errno)); - } else { - printlim(how, &limit, l); - } - return 0; -} -#endif diff --git a/bin/dash/src/miscbltin.h b/bin/dash/src/miscbltin.h deleted file mode 100644 index dd9a8d1c..00000000 --- a/bin/dash/src/miscbltin.h +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Copyright (c) 1997 Christos Zoulas. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -int readcmd(int, char **); -int umaskcmd(int, char **); -int ulimitcmd(int, char **); diff --git a/bin/dash/src/mkbuiltins b/bin/dash/src/mkbuiltins deleted file mode 100644 index f1f25932..00000000 --- a/bin/dash/src/mkbuiltins +++ /dev/null @@ -1,120 +0,0 @@ -#!/bin/sh - -# $NetBSD: mkbuiltins,v 1.17 2002/11/24 22:35:41 christos Exp $ -# -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)mkbuiltins 8.2 (Berkeley) 5/4/95 - -tempfile=mktemp -if ! type tempfile > /dev/null 2>&1 && ! type mktemp > /dev/null 2>&1; then - _my_tempfile() - { - local index=0 - while test -f "${TMPDIR:-/tmp}/builtin.$$.$index"; do - index=`expr $index + 1` - done - - touch "${TMPDIR:-/tmp}/builtin.$$.$index" - echo "${TMPDIR:-/tmp}/builtin.$$.$index" - } - - tempfile="_my_tempfile" -elif ! type tempfile > /dev/null 2>&1; then - tempfile="mktemp ${TMPDIR:-/tmp}/builtin.XXXXXX" -fi - -trap 'rm -f $temp $temp2' EXIT -temp=$($tempfile) -temp2=$($tempfile) - -builtins=$1 - -exec > builtins.c -cat <<\! -/* - * This file was generated by the mkbuiltins program. - */ - -#include "shell.h" -#include "builtins.h" - -! -< $builtins sed '/^#/d; /^ *$/d' > $temp -awk '{ printf "int %s(int, char **);\n", $1}' $temp -echo ' -const struct builtincmd builtincmd[] = {' -awk '{ for (i = 2 ; i <= NF ; i++) { - line = $i "\t" $1 - if ($i ~ /^-/) - line = $(++i) "\t" line - print line - }}' $temp | LC_ALL= LC_COLLATE=C sort -k 1,1 | tee $temp2 | awk '{ - opt = "" - if (NF > 2) { - opt = substr($2, 2) - $2 = $3 - } - mask = 0 - cmd = $2 - if (opt ~ /n/) { cmd = "NULL" } - if (opt ~ /s/) { mask += 1 } - if (opt ~ /[su]/) { mask += 2 } - if (opt ~ /a/) { mask += 4 } - printf "\t{ \"%s\", %s, %d },\n", $1, cmd, mask - }' -echo '};' - -exec > builtins.h -cat <<\! -/* - * This file was generated by the mkbuiltins program. - */ - -! -sed 's/ -[a-z]*//' $temp2 | nl -ba -v0 | - LC_ALL= LC_COLLATE=C sort -u -k 3,3 | - tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ | - awk '{ printf "#define %s (builtincmd + %d)\n", $3, $1}' -printf '\n#define NUMBUILTINS %d\n' $(wc -l < $temp2) -echo ' -#define BUILTIN_SPECIAL 0x1 -#define BUILTIN_REGULAR 0x2 -#define BUILTIN_ASSIGN 0x4 - -struct builtincmd { - const char *name; - int (*builtin)(int, char **); - unsigned flags; -}; - -extern const struct builtincmd builtincmd[];' diff --git a/bin/dash/src/mkinit.c b/bin/dash/src/mkinit.c deleted file mode 100644 index 9025862e..00000000 --- a/bin/dash/src/mkinit.c +++ /dev/null @@ -1,493 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * This program scans all the source files for code to handle various - * special events and combines this code into one file. This (allegedly) - * improves the structure of the program since there is no need for - * anyone outside of a module to know that that module performs special - * operations on particular events. - * - * Usage: mkinit sourcefile... - */ - - -#include <sys/types.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <fcntl.h> -#include <unistd.h> - - -/* - * OUTFILE is the name of the output file. Output is initially written - * to the file OUTTEMP, which is then moved to OUTFILE. - */ - -#define OUTFILE "init.c" -#define OUTTEMP "init.c.new" - - -/* - * A text structure is basicly just a string that grows as more characters - * are added onto the end of it. It is implemented as a linked list of - * blocks of characters. The routines addstr and addchar append a string - * or a single character, respectively, to a text structure. Writetext - * writes the contents of a text structure to a file. - */ - -#define BLOCKSIZE 512 - -struct text { - char *nextc; - int nleft; - struct block *start; - struct block *last; -}; - -struct block { - struct block *next; - char text[BLOCKSIZE]; -}; - - -/* - * There is one event structure for each event that mkinit handles. - */ - -struct event { - char *name; /* name of event (e.g. INIT) */ - char *routine; /* name of routine called on event */ - char *comment; /* comment describing routine */ - struct text code; /* code for handling event */ -}; - - -char writer[] = "\ -/*\n\ - * This file was generated by the mkinit program.\n\ - */\n\ -\n"; - -char init[] = "\ -/*\n\ - * Initialization code.\n\ - */\n"; - -char exitreset[] = "\ -/*\n\ - * This routine is called when an error or an interrupt occurs in an\n\ - * interactive shell and control is returned to the main command loop\n\ - * but prior to exitshell. \n\ - */\n"; - -char forkreset[] = "\ -/*\n\ - * This routine is called when we enter a subshell.\n\ - */\n"; - -char reset[] = "\ -/*\n\ - * This routine is called when an error or an interrupt occurs in an\n\ - * interactive shell and control is returned to the main command loop.\n\ - */\n"; - - -struct event event[] = { - {"INIT", "init", init}, - {"EXITRESET", "exitreset", exitreset}, - {"FORKRESET", "forkreset", forkreset}, - {"RESET", "reset", reset}, - {NULL, NULL} -}; - - -char *curfile; /* current file */ -int linno; /* current line */ -char *header_files[200]; /* list of header files */ -struct text defines; /* #define statements */ -struct text decls; /* declarations */ -int amiddecls; /* for formatting */ - - -void readfile(char *); -int match(char *, char *); -int gooddefine(char *); -void doevent(struct event *, FILE *, char *); -void doinclude(char *); -void dodecl(char *, FILE *); -void output(void); -void addstr(char *, struct text *); -void addchar(int, struct text *); -void writetext(struct text *, FILE *); -FILE *ckfopen(char *, char *); -void *ckmalloc(int); -char *savestr(char *); -static void error(char *); -int main(int, char **); - -#define equal(s1, s2) (strcmp(s1, s2) == 0) - -int -main(int argc, char **argv) -{ - char **ap; - - header_files[0] = "\"shell.h\""; - header_files[1] = "\"mystring.h\""; - header_files[2] = "\"init.h\""; - for (ap = argv + 1 ; *ap ; ap++) - readfile(*ap); - output(); - rename(OUTTEMP, OUTFILE); - exit(0); - /* NOTREACHED */ -} - - -/* - * Parse an input file. - */ - -void -readfile(char *fname) -{ - FILE *fp; - char line[1024]; - struct event *ep; - - fp = ckfopen(fname, "r"); - curfile = fname; - linno = 0; - amiddecls = 0; - while (fgets(line, sizeof line, fp) != NULL) { - linno++; - for (ep = event ; ep->name ; ep++) { - if (line[0] == ep->name[0] && match(ep->name, line)) { - doevent(ep, fp, fname); - break; - } - } - if (line[0] == 'I' && match("INCLUDE", line)) - doinclude(line); - if (line[0] == 'M' && match("MKINIT", line)) - dodecl(line, fp); - if (line[0] == '#' && gooddefine(line)) { - char *cp; - char line2[1024]; - static const char undef[] = "#undef "; - - strcpy(line2, line); - memcpy(line2, undef, sizeof(undef) - 1); - cp = line2 + sizeof(undef) - 1; - while(*cp && (*cp == ' ' || *cp == '\t')) - cp++; - while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n') - cp++; - *cp++ = '\n'; *cp = '\0'; - addstr(line2, &defines); - addstr(line, &defines); - } - } - fclose(fp); -} - - -int -match(char *name, char *line) -{ - char *p, *q; - - p = name, q = line; - while (*p) { - if (*p++ != *q++) - return 0; - } - if (*q != '{' && *q != ' ' && *q != '\t' && *q != '\n') - return 0; - return 1; -} - - -int -gooddefine(char *line) -{ - char *p; - - if (! match("#define", line)) - return 0; /* not a define */ - p = line + 7; - while (*p == ' ' || *p == '\t') - p++; - while (*p != ' ' && *p != '\t') { - if (*p == '(') - return 0; /* macro definition */ - p++; - } - while (*p != '\n' && *p != '\0') - p++; - if (p[-1] == '\\') - return 0; /* multi-line definition */ - return 1; -} - - -void -doevent(struct event *ep, FILE *fp, char *fname) -{ - char line[1024]; - int indent; - char *p; - - sprintf(line, "\n /* from %s: */\n", fname); - addstr(line, &ep->code); - addstr(" {\n", &ep->code); - for (;;) { - linno++; - if (fgets(line, sizeof line, fp) == NULL) - error("Unexpected EOF"); - if (equal(line, "}\n")) - break; - indent = 6; - for (p = line ; *p == '\t' ; p++) - indent += 8; - for ( ; *p == ' ' ; p++) - indent++; - if (*p == '\n' || *p == '#') - indent = 0; - while (indent >= 8) { - addchar('\t', &ep->code); - indent -= 8; - } - while (indent > 0) { - addchar(' ', &ep->code); - indent--; - } - addstr(p, &ep->code); - } - addstr(" }\n", &ep->code); -} - - -void -doinclude(char *line) -{ - char *p; - char *name; - char **pp; - - for (p = line ; *p != '"' && *p != '<' && *p != '\0' ; p++); - if (*p == '\0') - error("Expecting '\"' or '<'"); - name = p; - while (*p != ' ' && *p != '\t' && *p != '\n') - p++; - if (p[-1] != '"' && p[-1] != '>') - error("Missing terminator"); - *p = '\0'; - - /* name now contains the name of the include file */ - for (pp = header_files ; *pp && ! equal(*pp, name) ; pp++); - if (*pp == NULL) - *pp = savestr(name); -} - - -void -dodecl(char *line1, FILE *fp) -{ - char line[1024]; - char *p, *q; - - if (strcmp(line1, "MKINIT\n") == 0) { /* start of struct/union decl */ - addchar('\n', &decls); - do { - linno++; - if (fgets(line, sizeof line, fp) == NULL) - error("Unterminated structure declaration"); - addstr(line, &decls); - } while (line[0] != '}'); - amiddecls = 0; - } else { - if (! amiddecls) - addchar('\n', &decls); - q = NULL; - for (p = line1 + 6 ; *p && strchr("=/\n", *p) == NULL; p++) - continue; - if (*p == '=') { /* eliminate initialization */ - for (q = p ; *q && *q != ';' ; q++); - if (*q == '\0') - q = NULL; - else { - while (p[-1] == ' ') - p--; - *p = '\0'; - } - } - addstr("extern", &decls); - addstr(line1 + 6, &decls); - if (q != NULL) - addstr(q, &decls); - amiddecls = 1; - } -} - - - -/* - * Write the output to the file OUTTEMP. - */ - -void -output(void) -{ - FILE *fp; - char **pp; - struct event *ep; - - fp = ckfopen(OUTTEMP, "w"); - fputs(writer, fp); - for (pp = header_files ; *pp ; pp++) - fprintf(fp, "#include %s\n", *pp); - fputs("\n\n\n", fp); - writetext(&defines, fp); - fputs("\n\n", fp); - writetext(&decls, fp); - for (ep = event ; ep->name ; ep++) { - fputs("\n\n\n", fp); - fputs(ep->comment, fp); - fprintf(fp, "\nvoid\n%s() {\n", ep->routine); - writetext(&ep->code, fp); - fprintf(fp, "}\n"); - } - fclose(fp); -} - - -/* - * A text structure is simply a block of text that is kept in memory. - * Addstr appends a string to the text struct, and addchar appends a single - * character. - */ - -void -addstr(char *s, struct text *text) -{ - while (*s) { - if (--text->nleft < 0) - addchar(*s++, text); - else - *text->nextc++ = *s++; - } -} - - -void -addchar(int c, struct text *text) -{ - struct block *bp; - - if (--text->nleft < 0) { - bp = ckmalloc(sizeof *bp); - if (text->start == NULL) - text->start = bp; - else - text->last->next = bp; - text->last = bp; - text->nextc = bp->text; - text->nleft = BLOCKSIZE - 1; - } - *text->nextc++ = c; -} - -/* - * Write the contents of a text structure to a file. - */ -void -writetext(struct text *text, FILE *fp) -{ - struct block *bp; - - if (text->start != NULL) { - for (bp = text->start ; bp != text->last ; bp = bp->next) { - if ((fwrite(bp->text, sizeof (char), BLOCKSIZE, fp)) != BLOCKSIZE) - error("Can't write data\n"); - } - if ((fwrite(bp->text, sizeof (char), BLOCKSIZE - text->nleft, fp)) != (BLOCKSIZE - text->nleft)) - error("Can't write data\n"); - } -} - -FILE * -ckfopen(char *file, char *mode) -{ - FILE *fp; - - if ((fp = fopen(file, mode)) == NULL) { - fprintf(stderr, "Can't open %s\n", file); - exit(2); - } - return fp; -} - -void * -ckmalloc(int nbytes) -{ - char *p; - - if ((p = malloc(nbytes)) == NULL) - error("Out of space"); - return p; -} - -char * -savestr(char *s) -{ - char *p; - - p = ckmalloc(strlen(s) + 1); - strcpy(p, s); - return p; -} - -static void -error(char *msg) -{ - if (curfile != NULL) - fprintf(stderr, "%s:%d: ", curfile, linno); - fprintf(stderr, "%s\n", msg); - exit(2); - /* NOTREACHED */ -} diff --git a/bin/dash/src/mknodes.c b/bin/dash/src/mknodes.c deleted file mode 100644 index 1903a605..00000000 --- a/bin/dash/src/mknodes.c +++ /dev/null @@ -1,448 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * This program reads the nodetypes file and nodes.c.pat file. It generates - * the files nodes.h and nodes.c. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> - -#define MAXTYPES 50 /* max number of node types */ -#define MAXFIELDS 20 /* max fields in a structure */ -#define BUFLEN 100 /* size of character buffers */ - -/* field types */ -#define T_NODE 1 /* union node *field */ -#define T_NODELIST 2 /* struct nodelist *field */ -#define T_STRING 3 -#define T_INT 4 /* int field */ -#define T_OTHER 5 /* other */ -#define T_TEMP 6 /* don't copy this field */ - - -struct field { /* a structure field */ - char *name; /* name of field */ - int type; /* type of field */ - char *decl; /* declaration of field */ -}; - - -struct str { /* struct representing a node structure */ - char *tag; /* structure tag */ - int nfields; /* number of fields in the structure */ - struct field field[MAXFIELDS]; /* the fields of the structure */ - int done; /* set if fully parsed */ -}; - - -static int ntypes; /* number of node types */ -static char *nodename[MAXTYPES]; /* names of the nodes */ -static struct str *nodestr[MAXTYPES]; /* type of structure used by the node */ -static int nstr; /* number of structures */ -static struct str str[MAXTYPES]; /* the structures */ -static struct str *curstr; /* current structure */ -static FILE *infp; -static char line[1024]; -static int linno; -static char *linep; - -static void parsenode(void); -static void parsefield(void); -static void output(char *); -static void outsizes(FILE *); -static void outfunc(FILE *, int); -static void indent(int, FILE *); -static int nextfield(char *); -static void skipbl(void); -static int readline(void); -static void error(const char *, ...); -static char *savestr(const char *); -int main(int, char **); - - -int -main(int argc, char **argv) -{ - - /* - * some versions of linux complain: initializer element is not - * constant if this is done at compile time. - */ - infp = stdin; - - if (argc != 3) - error("usage: mknodes file"); - if ((infp = fopen(argv[1], "r")) == NULL) - error("Can't open %s", argv[1]); - while (readline()) { - if (line[0] == ' ' || line[0] == '\t') - parsefield(); - else if (line[0] != '\0') - parsenode(); - } - output(argv[2]); - exit(0); - /* NOTREACHED */ -} - - - -static void -parsenode(void) -{ - char name[BUFLEN]; - char tag[BUFLEN]; - struct str *sp; - - if (curstr && curstr->nfields > 0) - curstr->done = 1; - nextfield(name); - if (! nextfield(tag)) - error("Tag expected"); - if (*linep != '\0') - error("Garbage at end of line"); - nodename[ntypes] = savestr(name); - for (sp = str ; sp < str + nstr ; sp++) { - if (strcmp(sp->tag, tag) == 0) - break; - } - if (sp >= str + nstr) { - sp->tag = savestr(tag); - sp->nfields = 0; - curstr = sp; - nstr++; - } - nodestr[ntypes] = sp; - ntypes++; -} - - -static void -parsefield(void) -{ - char name[BUFLEN]; - char type[BUFLEN]; - char decl[2 * BUFLEN]; - struct field *fp; - - if (curstr == NULL || curstr->done) - error("No current structure to add field to"); - if (! nextfield(name)) - error("No field name"); - if (! nextfield(type)) - error("No field type"); - fp = &curstr->field[curstr->nfields]; - fp->name = savestr(name); - if (strcmp(type, "nodeptr") == 0) { - fp->type = T_NODE; - sprintf(decl, "union node *%s", name); - } else if (strcmp(type, "nodelist") == 0) { - fp->type = T_NODELIST; - sprintf(decl, "struct nodelist *%s", name); - } else if (strcmp(type, "string") == 0) { - fp->type = T_STRING; - sprintf(decl, "char *%s", name); - } else if (strcmp(type, "int") == 0) { - fp->type = T_INT; - sprintf(decl, "int %s", name); - } else if (strcmp(type, "other") == 0) { - fp->type = T_OTHER; - } else if (strcmp(type, "temp") == 0) { - fp->type = T_TEMP; - } else { - error("Unknown type %s", type); - } - if (fp->type == T_OTHER || fp->type == T_TEMP) { - skipbl(); - fp->decl = savestr(linep); - } else { - if (*linep) - error("Garbage at end of line"); - fp->decl = savestr(decl); - } - curstr->nfields++; -} - - -char writer[] = "\ -/*\n\ - * This file was generated by the mknodes program.\n\ - */\n\ -\n"; - -static void -output(char *file) -{ - FILE *hfile; - FILE *cfile; - FILE *patfile; - int i; - struct str *sp; - struct field *fp; - char *p; - - if ((patfile = fopen(file, "r")) == NULL) - error("Can't open %s", file); - if ((hfile = fopen("nodes.h", "w")) == NULL) - error("Can't create nodes.h"); - if ((cfile = fopen("nodes.c", "w")) == NULL) - error("Can't create nodes.c"); - fputs(writer, hfile); - for (i = 0 ; i < ntypes ; i++) - fprintf(hfile, "#define %s %d\n", nodename[i], i); - fputs("\n\n\n", hfile); - for (sp = str ; sp < &str[nstr] ; sp++) { - fprintf(hfile, "struct %s {\n", sp->tag); - for (i = sp->nfields, fp = sp->field ; --i >= 0 ; fp++) { - fprintf(hfile, " %s;\n", fp->decl); - } - fputs("};\n\n\n", hfile); - } - fputs("union node {\n", hfile); - fprintf(hfile, " int type;\n"); - for (sp = str ; sp < &str[nstr] ; sp++) { - fprintf(hfile, " struct %s %s;\n", sp->tag, sp->tag); - } - fputs("};\n\n\n", hfile); - fputs("struct nodelist {\n", hfile); - fputs("\tstruct nodelist *next;\n", hfile); - fputs("\tunion node *n;\n", hfile); - fputs("};\n\n\n", hfile); - fputs("struct funcnode {\n", hfile); - fputs("\tint count;\n", hfile); - fputs("\tunion node n;\n", hfile); - fputs("};\n\n\n", hfile); - fputs("struct funcnode *copyfunc(union node *);\n", hfile); - fputs("void freefunc(struct funcnode *);\n", hfile); - - fputs(writer, cfile); - while (fgets(line, sizeof line, patfile) != NULL) { - for (p = line ; *p == ' ' || *p == '\t' ; p++); - if (strcmp(p, "%SIZES\n") == 0) - outsizes(cfile); - else if (strcmp(p, "%CALCSIZE\n") == 0) - outfunc(cfile, 1); - else if (strcmp(p, "%COPY\n") == 0) - outfunc(cfile, 0); - else - fputs(line, cfile); - } -} - - - -static void -outsizes(FILE *cfile) -{ - int i; - - fprintf(cfile, "static const short nodesize[%d] = {\n", ntypes); - for (i = 0 ; i < ntypes ; i++) { - fprintf(cfile, " SHELL_ALIGN(sizeof (struct %s)),\n", - nodestr[i]->tag); - } - fprintf(cfile, "};\n"); -} - - -static void -outfunc(FILE *cfile, int calcsize) -{ - struct str *sp; - struct field *fp; - int i; - - fputs(" if (n == NULL)\n", cfile); - if (calcsize) - fputs(" return;\n", cfile); - else - fputs(" return NULL;\n", cfile); - if (calcsize) - fputs(" funcblocksize += nodesize[n->type];\n", cfile); - else { - fputs(" new = funcblock;\n", cfile); - fputs(" funcblock = (char *) funcblock + nodesize[n->type];\n", cfile); - } - fputs(" switch (n->type) {\n", cfile); - for (sp = str ; sp < &str[nstr] ; sp++) { - for (i = 0 ; i < ntypes ; i++) { - if (nodestr[i] == sp) - fprintf(cfile, " case %s:\n", nodename[i]); - } - for (i = sp->nfields ; --i >= 1 ; ) { - fp = &sp->field[i]; - switch (fp->type) { - case T_NODE: - if (calcsize) { - indent(12, cfile); - fprintf(cfile, "calcsize(n->%s.%s);\n", - sp->tag, fp->name); - } else { - indent(12, cfile); - fprintf(cfile, "new->%s.%s = copynode(n->%s.%s);\n", - sp->tag, fp->name, sp->tag, fp->name); - } - break; - case T_NODELIST: - if (calcsize) { - indent(12, cfile); - fprintf(cfile, "sizenodelist(n->%s.%s);\n", - sp->tag, fp->name); - } else { - indent(12, cfile); - fprintf(cfile, "new->%s.%s = copynodelist(n->%s.%s);\n", - sp->tag, fp->name, sp->tag, fp->name); - } - break; - case T_STRING: - if (calcsize) { - indent(12, cfile); - fprintf(cfile, "funcstringsize += strlen(n->%s.%s) + 1;\n", - sp->tag, fp->name); - } else { - indent(12, cfile); - fprintf(cfile, "new->%s.%s = nodesavestr(n->%s.%s);\n", - sp->tag, fp->name, sp->tag, fp->name); - } - break; - case T_INT: - case T_OTHER: - if (! calcsize) { - indent(12, cfile); - fprintf(cfile, "new->%s.%s = n->%s.%s;\n", - sp->tag, fp->name, sp->tag, fp->name); - } - break; - } - } - indent(12, cfile); - fputs("break;\n", cfile); - } - fputs(" };\n", cfile); - if (! calcsize) - fputs(" new->type = n->type;\n", cfile); -} - - -static void -indent(int amount, FILE *fp) -{ - while (amount >= 8) { - putc('\t', fp); - amount -= 8; - } - while (--amount >= 0) { - putc(' ', fp); - } -} - - -static int -nextfield(char *buf) -{ - char *p, *q; - - p = linep; - while (*p == ' ' || *p == '\t') - p++; - q = buf; - while (*p != ' ' && *p != '\t' && *p != '\0') - *q++ = *p++; - *q = '\0'; - linep = p; - return (q > buf); -} - - -static void -skipbl(void) -{ - while (*linep == ' ' || *linep == '\t') - linep++; -} - - -static int -readline(void) -{ - char *p; - - if (fgets(line, 1024, infp) == NULL) - return 0; - for (p = line ; *p != '#' && *p != '\n' && *p != '\0' ; p++); - while (p > line && (p[-1] == ' ' || p[-1] == '\t')) - p--; - *p = '\0'; - linep = line; - linno++; - if (p - line > BUFLEN) - error("Line too long"); - return 1; -} - - - -static void -error(const char *msg, ...) -{ - va_list va; - - va_start(va, msg); - - (void) fprintf(stderr, "line %d: ", linno); - (void) vfprintf(stderr, msg, va); - (void) fputc('\n', stderr); - - va_end(va); - - exit(2); - /* NOTREACHED */ -} - - - -static char * -savestr(const char *s) -{ - char *p; - - if ((p = malloc(strlen(s) + 1)) == NULL) - error("Out of space"); - (void) strcpy(p, s); - return p; -} diff --git a/bin/dash/src/mksignames.c b/bin/dash/src/mksignames.c deleted file mode 100644 index a832eab9..00000000 --- a/bin/dash/src/mksignames.c +++ /dev/null @@ -1,417 +0,0 @@ -/* signames.c -- Create and write `signames.c', which contains an array of - signal names. */ - -/* Copyright (C) 1992 Free Software Foundation, Inc. - - This file is part of GNU Bash, the Bourne Again SHell. - - Bash is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 2, or (at your option) any later - version. - - Bash is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - for more details. - - You should have received a copy of the GNU General Public License along - with Bash; see the file COPYING. If not, write to the Free Software - Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ - -#include <stdio.h> -#include <sys/types.h> -#include <signal.h> -#include <stdlib.h> - -#if !defined (NSIG) -# define NSIG 64 -#endif - -/* - * Special traps: - * EXIT == 0 - */ -#define LASTSIG NSIG-1 - -char *signal_names[2 * NSIG + 3]; - -#define signal_names_size (sizeof(signal_names)/sizeof(signal_names[0])) - -char *progname; - -/* AIX 4.3 defines SIGRTMIN and SIGRTMAX as 888 and 999 respectively. - I don't want to allocate so much unused space for the intervening signal - numbers, so we just punt if SIGRTMAX is past the bounds of the - signal_names array (handled in configure). */ -#if defined (SIGRTMAX) && defined (UNUSABLE_RT_SIGNALS) -# undef SIGRTMAX -# undef SIGRTMIN -#endif - -#if defined (SIGRTMAX) || defined (SIGRTMIN) -# define RTLEN 14 -# define RTLIM 256 -#endif - -void -initialize_signames () -{ - register int i; -#if defined (SIGRTMAX) || defined (SIGRTMIN) - int rtmin, rtmax, rtcnt; -#endif - - for (i = 1; i < signal_names_size; i++) - signal_names[i] = (char *)NULL; - - /* `signal' 0 is what we do on exit. */ - signal_names[0] = "EXIT"; - - /* Place signal names which can be aliases for more common signal - names first. This allows (for example) SIGABRT to overwrite SIGLOST. */ - - /* POSIX 1003.1b-1993 real time signals, but take care of incomplete - implementations. Acoording to the standard, both, SIGRTMIN and - SIGRTMAX must be defined, SIGRTMIN must be stricly less than - SIGRTMAX, and the difference must be at least 7, that is, there - must be at least eight distinct real time signals. */ - - /* The generated signal names are SIGRTMIN, SIGRTMIN+1, ..., - SIGRTMIN+x, SIGRTMAX-x, ..., SIGRTMAX-1, SIGRTMAX. If the number - of RT signals is odd, there is an extra SIGRTMIN+(x+1). - These names are the ones used by ksh and /usr/xpg4/bin/sh on SunOS5. */ - -#if defined (SIGRTMIN) - rtmin = SIGRTMIN; - signal_names[rtmin] = "RTMIN"; -#endif - -#if defined (SIGRTMAX) - rtmax = SIGRTMAX; - signal_names[rtmax] = "RTMAX"; -#endif - -#if defined (SIGRTMAX) && defined (SIGRTMIN) - if (rtmax > rtmin) - { - rtcnt = (rtmax - rtmin - 1) / 2; - /* croak if there are too many RT signals */ - if (rtcnt >= RTLIM/2) - { - rtcnt = RTLIM/2-1; - fprintf(stderr, "%s: error: more than %i real time signals, fix `%s'\n", - progname, RTLIM, progname); - } - - for (i = 1; i <= rtcnt; i++) - { - signal_names[rtmin+i] = (char *)malloc(RTLEN); - if (signal_names[rtmin+i]) - sprintf (signal_names[rtmin+i], "RTMIN+%d", i); - signal_names[rtmax-i] = (char *)malloc(RTLEN); - if (signal_names[rtmax-i]) - sprintf (signal_names[rtmax-i], "RTMAX-%d", i); - } - - if (rtcnt < RTLIM/2-1 && rtcnt != (rtmax-rtmin)/2) - { - /* Need an extra RTMIN signal */ - signal_names[rtmin+rtcnt+1] = (char *)malloc(RTLEN); - if (signal_names[rtmin+rtcnt+1]) - sprintf (signal_names[rtmin+rtcnt+1], "RTMIN+%d", rtcnt+1); - } - } -#endif /* SIGRTMIN && SIGRTMAX */ - -/* AIX */ -#if defined (SIGLOST) /* resource lost (eg, record-lock lost) */ - signal_names[SIGLOST] = "LOST"; -#endif - -#if defined (SIGMSG) /* HFT input data pending */ - signal_names[SIGMSG] = "MSG"; -#endif - -#if defined (SIGDANGER) /* system crash imminent */ - signal_names[SIGDANGER] = "DANGER"; -#endif - -#if defined (SIGMIGRATE) /* migrate process to another CPU */ - signal_names[SIGMIGRATE] = "MIGRATE"; -#endif - -#if defined (SIGPRE) /* programming error */ - signal_names[SIGPRE] = "PRE"; -#endif - -#if defined (SIGVIRT) /* AIX virtual time alarm */ - signal_names[SIGVIRT] = "VIRT"; -#endif - -#if defined (SIGALRM1) /* m:n condition variables */ - signal_names[SIGALRM1] = "ALRM1"; -#endif - -#if defined (SIGWAITING) /* m:n scheduling */ - signal_names[SIGWAITING] = "WAITING"; -#endif - -#if defined (SIGGRANT) /* HFT monitor mode granted */ - signal_names[SIGGRANT] = "GRANT"; -#endif - -#if defined (SIGKAP) /* keep alive poll from native keyboard */ - signal_names[SIGKAP] = "KAP"; -#endif - -#if defined (SIGRETRACT) /* HFT monitor mode retracted */ - signal_names[SIGRETRACT] = "RETRACT"; -#endif - -#if defined (SIGSOUND) /* HFT sound sequence has completed */ - signal_names[SIGSOUND] = "SOUND"; -#endif - -#if defined (SIGSAK) /* Secure Attention Key */ - signal_names[SIGSAK] = "SAK"; -#endif - -/* SunOS5 */ -#if defined (SIGLWP) /* special signal used by thread library */ - signal_names[SIGLWP] = "LWP"; -#endif - -#if defined (SIGFREEZE) /* special signal used by CPR */ - signal_names[SIGFREEZE] = "FREEZE"; -#endif - -#if defined (SIGTHAW) /* special signal used by CPR */ - signal_names[SIGTHAW] = "THAW"; -#endif - -#if defined (SIGCANCEL) /* thread cancellation signal used by libthread */ - signal_names[SIGCANCEL] = "CANCEL"; -#endif - -/* HP-UX */ -#if defined (SIGDIL) /* DIL signal (?) */ - signal_names[SIGDIL] = "DIL"; -#endif - -/* System V */ -#if defined (SIGCLD) /* Like SIGCHLD. */ - signal_names[SIGCLD] = "CLD"; -#endif - -#if defined (SIGPWR) /* power state indication */ - signal_names[SIGPWR] = "PWR"; -#endif - -#if defined (SIGPOLL) /* Pollable event (for streams) */ - signal_names[SIGPOLL] = "POLL"; -#endif - -/* Unknown */ -#if defined (SIGWINDOW) - signal_names[SIGWINDOW] = "WINDOW"; -#endif - -/* Common */ -#if defined (SIGHUP) /* hangup */ - signal_names[SIGHUP] = "HUP"; -#endif - -#if defined (SIGINT) /* interrupt */ - signal_names[SIGINT] = "INT"; -#endif - -#if defined (SIGQUIT) /* quit */ - signal_names[SIGQUIT] = "QUIT"; -#endif - -#if defined (SIGILL) /* illegal instruction (not reset when caught) */ - signal_names[SIGILL] = "ILL"; -#endif - -#if defined (SIGTRAP) /* trace trap (not reset when caught) */ - signal_names[SIGTRAP] = "TRAP"; -#endif - -#if defined (SIGIOT) /* IOT instruction */ - signal_names[SIGIOT] = "IOT"; -#endif - -#if defined (SIGABRT) /* Cause current process to dump core. */ - signal_names[SIGABRT] = "ABRT"; -#endif - -#if defined (SIGEMT) /* EMT instruction */ - signal_names[SIGEMT] = "EMT"; -#endif - -#if defined (SIGFPE) /* floating point exception */ - signal_names[SIGFPE] = "FPE"; -#endif - -#if defined (SIGKILL) /* kill (cannot be caught or ignored) */ - signal_names[SIGKILL] = "KILL"; -#endif - -#if defined (SIGBUS) /* bus error */ - signal_names[SIGBUS] = "BUS"; -#endif - -#if defined (SIGSEGV) /* segmentation violation */ - signal_names[SIGSEGV] = "SEGV"; -#endif - -#if defined (SIGSYS) /* bad argument to system call */ - signal_names[SIGSYS] = "SYS"; -#endif - -#if defined (SIGPIPE) /* write on a pipe with no one to read it */ - signal_names[SIGPIPE] = "PIPE"; -#endif - -#if defined (SIGALRM) /* alarm clock */ - signal_names[SIGALRM] = "ALRM"; -#endif - -#if defined (SIGTERM) /* software termination signal from kill */ - signal_names[SIGTERM] = "TERM"; -#endif - -#if defined (SIGURG) /* urgent condition on IO channel */ - signal_names[SIGURG] = "URG"; -#endif - -#if defined (SIGSTOP) /* sendable stop signal not from tty */ - signal_names[SIGSTOP] = "STOP"; -#endif - -#if defined (SIGTSTP) /* stop signal from tty */ - signal_names[SIGTSTP] = "TSTP"; -#endif - -#if defined (SIGCONT) /* continue a stopped process */ - signal_names[SIGCONT] = "CONT"; -#endif - -#if defined (SIGCHLD) /* to parent on child stop or exit */ - signal_names[SIGCHLD] = "CHLD"; -#endif - -#if defined (SIGTTIN) /* to readers pgrp upon background tty read */ - signal_names[SIGTTIN] = "TTIN"; -#endif - -#if defined (SIGTTOU) /* like TTIN for output if (tp->t_local<OSTOP) */ - signal_names[SIGTTOU] = "TTOU"; -#endif - -#if defined (SIGIO) /* input/output possible signal */ - signal_names[SIGIO] = "IO"; -#endif - -#if defined (SIGXCPU) /* exceeded CPU time limit */ - signal_names[SIGXCPU] = "XCPU"; -#endif - -#if defined (SIGXFSZ) /* exceeded file size limit */ - signal_names[SIGXFSZ] = "XFSZ"; -#endif - -#if defined (SIGVTALRM) /* virtual time alarm */ - signal_names[SIGVTALRM] = "VTALRM"; -#endif - -#if defined (SIGPROF) /* profiling time alarm */ - signal_names[SIGPROF] = "PROF"; -#endif - -#if defined (SIGWINCH) /* window changed */ - signal_names[SIGWINCH] = "WINCH"; -#endif - -/* 4.4 BSD */ -#if defined (SIGINFO) && !defined (_SEQUENT_) /* information request */ - signal_names[SIGINFO] = "INFO"; -#endif - -#if defined (SIGUSR1) /* user defined signal 1 */ - signal_names[SIGUSR1] = "USR1"; -#endif - -#if defined (SIGUSR2) /* user defined signal 2 */ - signal_names[SIGUSR2] = "USR2"; -#endif - -#if defined (SIGKILLTHR) /* BeOS: Kill Thread */ - signal_names[SIGKILLTHR] = "KILLTHR"; -#endif - - for (i = 0; i < NSIG; i++) - if (signal_names[i] == (char *)NULL) - { - signal_names[i] = (char *)malloc (18); - if (signal_names[i]) - sprintf (signal_names[i], "%d", i); - } -} - -void -write_signames (stream) - FILE *stream; -{ - register int i; - - fprintf (stream, "/* This file was automatically created by %s.\n", - progname); - fprintf (stream, " Do not edit. Edit support/mksignames.c instead. */\n\n"); - fprintf (stream, "#include <signal.h>\n\n"); - fprintf (stream, - "/* A translation list so we can be polite to our users. */\n"); - fprintf (stream, "const char *const signal_names[NSIG + 1] = {\n"); - - for (i = 0; i <= LASTSIG; i++) - fprintf (stream, " \"%s\",\n", signal_names[i]); - - fprintf (stream, " (char *)0x0\n"); - fprintf (stream, "};\n"); -} - -int -main(int argc, char **argv) -{ - char *stream_name; - FILE *stream; - - progname = argv[0]; - - if (argc == 1) - { - stream_name = "signames.c"; - } - else if (argc == 2) - { - stream_name = argv[1]; - } - else - { - fprintf (stderr, "Usage: %s [output-file]\n", progname); - exit (1); - } - - stream = fopen (stream_name, "w"); - if (!stream) - { - fprintf (stderr, "%s: %s: cannot open for writing\n", - progname, stream_name); - exit (2); - } - - initialize_signames (); - write_signames (stream); - exit (0); -} diff --git a/bin/dash/src/mksyntax.c b/bin/dash/src/mksyntax.c deleted file mode 100644 index a23c18ca..00000000 --- a/bin/dash/src/mksyntax.c +++ /dev/null @@ -1,315 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * This program creates syntax.h and syntax.c. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include "parser.h" - - -struct synclass { - char *name; - char *comment; -}; - -/* Syntax classes */ -struct synclass synclass[] = { - { "CWORD", "character is nothing special" }, - { "CNL", "newline character" }, - { "CBACK", "a backslash character" }, - { "CSQUOTE", "single quote" }, - { "CDQUOTE", "double quote" }, - { "CENDQUOTE", "a terminating quote" }, - { "CBQUOTE", "backwards single quote" }, - { "CVAR", "a dollar sign" }, - { "CENDVAR", "a '}' character" }, - { "CLP", "a left paren in arithmetic" }, - { "CRP", "a right paren in arithmetic" }, - { "CEOF", "end of file" }, - { "CCTL", "like CWORD, except it must be escaped" }, - { "CSPCL", "these terminate a word" }, - { "CIGN", "character should be ignored" }, - { NULL, NULL } -}; - - -/* - * Syntax classes for is_ functions. Warning: if you add new classes - * you may have to change the definition of the is_in_name macro. - */ -struct synclass is_entry[] = { - { "ISDIGIT", "a digit" }, - { "ISUPPER", "an upper case letter" }, - { "ISLOWER", "a lower case letter" }, - { "ISUNDER", "an underscore" }, - { "ISSPECL", "the name of a special parameter" }, - { NULL, NULL } -}; - -static char writer[] = "\ -/*\n\ - * This file was generated by the mksyntax program.\n\ - */\n\ -\n"; - - -static FILE *cfile; -static FILE *hfile; -static char *syntax[513]; - -static void filltable(char *); -static void init(void); -static void add(char *, char *); -static void print(char *); -static void output_type_macros(void); -int main(int, char **); - -int -main(int argc, char **argv) -{ - int i; - char buf[80]; - int pos; - - /* Create output files */ - if ((cfile = fopen("syntax.c", "w")) == NULL) { - perror("syntax.c"); - exit(2); - } - if ((hfile = fopen("syntax.h", "w")) == NULL) { - perror("syntax.h"); - exit(2); - } - fputs(writer, hfile); - fputs(writer, cfile); - - fputs("#include <ctype.h>\n", hfile); - fputs("\n", hfile); - fputs("#ifdef CEOF\n", hfile); - fputs("#undef CEOF\n", hfile); - fputs("#endif\n", hfile); - fputs("\n", hfile); - - /* Generate the #define statements in the header file */ - fputs("/* Syntax classes */\n", hfile); - for (i = 0 ; synclass[i].name ; i++) { - sprintf(buf, "#define %s %d", synclass[i].name, i); - fputs(buf, hfile); - for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) - putc('\t', hfile); - fprintf(hfile, "/* %s */\n", synclass[i].comment); - } - putc('\n', hfile); - fputs("/* Syntax classes for is_ functions */\n", hfile); - for (i = 0 ; is_entry[i].name ; i++) { - sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); - fputs(buf, hfile); - for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) - putc('\t', hfile); - fprintf(hfile, "/* %s */\n", is_entry[i].comment); - } - putc('\n', hfile); - fprintf(hfile, "#define SYNBASE %d\n", 130); - fprintf(hfile, "#define PEOF %d\n\n", -130); - fprintf(hfile, "#define PEOA %d\n\n", -129); - putc('\n', hfile); - fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); - fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); - fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); - fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); - putc('\n', hfile); - output_type_macros(); /* is_digit, etc. */ - putc('\n', hfile); - - /* Generate the syntax tables. */ - fputs("#include \"shell.h\"\n", cfile); - fputs("#include \"syntax.h\"\n\n", cfile); - init(); - fputs("/* syntax table used when not in quotes */\n", cfile); - add("\n", "CNL"); - add("\\", "CBACK"); - add("'", "CSQUOTE"); - add("\"", "CDQUOTE"); - add("`", "CBQUOTE"); - add("$", "CVAR"); - add("}", "CENDVAR"); - add("<>();&| \t", "CSPCL"); - syntax[1] = "CSPCL"; - print("basesyntax"); - init(); - fputs("\n/* syntax table used when in double quotes */\n", cfile); - add("\n", "CNL"); - add("\\", "CBACK"); - add("\"", "CENDQUOTE"); - add("`", "CBQUOTE"); - add("$", "CVAR"); - add("}", "CENDVAR"); - /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ - add("!*?[=~:/-]", "CCTL"); - print("dqsyntax"); - init(); - fputs("\n/* syntax table used when in single quotes */\n", cfile); - add("\n", "CNL"); - add("'", "CENDQUOTE"); - /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ - add("!*?[=~:/-]\\", "CCTL"); - print("sqsyntax"); - init(); - fputs("\n/* syntax table used when in arithmetic */\n", cfile); - add("\n", "CNL"); - add("\\", "CBACK"); - add("`", "CBQUOTE"); - add("$", "CVAR"); - add("}", "CENDVAR"); - add("(", "CLP"); - add(")", "CRP"); - print("arisyntax"); - filltable("0"); - fputs("\n/* character classification table */\n", cfile); - add("0123456789", "ISDIGIT"); - add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); - add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); - add("_", "ISUNDER"); - add("#?$!-*@", "ISSPECL"); - print("is_type"); - exit(0); - /* NOTREACHED */ -} - - - -/* - * Clear the syntax table. - */ - -static void -filltable(char *dftval) -{ - int i; - - for (i = 0 ; i < 258; i++) - syntax[i] = dftval; -} - - -/* - * Initialize the syntax table with default values. - */ - -static void -init(void) -{ - int ctl; - - filltable("CWORD"); - syntax[0] = "CEOF"; - syntax[1] = "CIGN"; - for (ctl = CTL_FIRST; ctl <= CTL_LAST; ctl++ ) - syntax[130 + ctl] = "CCTL"; -} - - -/* - * Add entries to the syntax table. - */ - -static void -add(char *p, char *type) -{ - while (*p) - syntax[(signed char)*p++ + 130] = type; -} - - - -/* - * Output the syntax table. - */ - -static void -print(char *name) -{ - int i; - int col; - - fprintf(hfile, "extern const char %s[];\n", name); - fprintf(cfile, "const char %s[] = {\n", name); - col = 0; - for (i = 0 ; i < 258; i++) { - if (i == 0) { - fputs(" ", cfile); - } else if ((i & 03) == 0) { - fputs(",\n ", cfile); - col = 0; - } else { - putc(',', cfile); - while (++col < 9 * (i & 03)) - putc(' ', cfile); - } - fputs(syntax[i], cfile); - col += strlen(syntax[i]); - } - fputs("\n};\n", cfile); -} - - - -/* - * Output character classification macros (e.g. is_digit). If digits are - * contiguous, we can test for them quickly. - */ - -static char *macro[] = { - "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)\n", - "#define is_alpha(c)\tisalpha((unsigned char)(c))\n", - "#define is_name(c)\t((c) == '_' || isalpha((unsigned char)(c)))\n", - "#define is_in_name(c)\t((c) == '_' || isalnum((unsigned char)(c)))\n", - "#define is_special(c)\t((is_type+SYNBASE)[(signed char)(c)] & (ISSPECL|ISDIGIT))\n", - NULL -}; - -static void -output_type_macros(void) -{ - char **pp; - - for (pp = macro ; *pp ; pp++) - fputs(*pp, hfile); - fputs("#define digit_val(c)\t((c) - '0')\n", hfile); -} diff --git a/bin/dash/src/mktokens b/bin/dash/src/mktokens deleted file mode 100644 index 78055be8..00000000 --- a/bin/dash/src/mktokens +++ /dev/null @@ -1,97 +0,0 @@ -#!/bin/sh - -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)mktokens 8.1 (Berkeley) 5/31/93 - -# The following is a list of tokens. The second column is nonzero if the -# token marks the end of a list. The third column is the name to print in -# error messages. - -: "${TMPDIR:=/tmp}" - -cat > "${TMPDIR}"/ka$$ <<\! -TEOF 1 end of file -TNL 0 newline -TSEMI 0 ";" -TBACKGND 0 "&" -TAND 0 "&&" -TOR 0 "||" -TPIPE 0 "|" -TLP 0 "(" -TRP 1 ")" -TENDCASE 1 ";;" -TENDBQUOTE 1 "`" -TREDIR 0 redirection -TWORD 0 word -TNOT 0 "!" -TCASE 0 "case" -TDO 1 "do" -TDONE 1 "done" -TELIF 1 "elif" -TELSE 1 "else" -TESAC 1 "esac" -TFI 1 "fi" -TFOR 0 "for" -TIF 0 "if" -TIN 0 "in" -TTHEN 1 "then" -TUNTIL 0 "until" -TWHILE 0 "while" -TBEGIN 0 "{" -TEND 1 "}" -! -nl=`wc -l "${TMPDIR}"/ka$$` -exec > token.h -awk '{print "#define " $1 " " NR-1}' "${TMPDIR}"/ka$$ - -exec > token_vars.h - -echo ' -/* Array indicating which tokens mark the end of a list */ -static const char tokendlist[] = {' -awk '{print "\t" $2 ","}' "${TMPDIR}"/ka$$ -echo '}; - -static const char *const tokname[] = {' -sed -e 's/"/\\"/g' \ - -e 's/[^ ]*[ ][ ]*[^ ]*[ ][ ]*\(.*\)/ "\1",/' \ - "${TMPDIR}"/ka$$ -echo '}; -' -sed 's/"//g' "${TMPDIR}"/ka$$ | awk ' -/TNOT/{print "#define KWDOFFSET " NR-1; print ""; - print "static const char *const parsekwd[] = {"} -/TNOT/,/neverfound/{if (last) print " \"" last "\","; last = $3} -END{print " \"" last "\"\n};"}' - -rm "${TMPDIR}"/ka$$ diff --git a/bin/dash/src/myhistedit.h b/bin/dash/src/myhistedit.h deleted file mode 100644 index 22e5c438..00000000 --- a/bin/dash/src/myhistedit.h +++ /dev/null @@ -1,46 +0,0 @@ -/*- - * Copyright (c) 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)myhistedit.h 8.2 (Berkeley) 5/4/95 - */ - -#include <histedit.h> - -extern History *hist; -extern EditLine *el; -extern int displayhist; - -void histedit(void); -void sethistsize(const char *); -void setterm(const char *); -int histcmd(int, char **); -int not_fcnumber(char *); -int str_to_event(const char *, int); - diff --git a/bin/dash/src/mystring.c b/bin/dash/src/mystring.c deleted file mode 100644 index de624b89..00000000 --- a/bin/dash/src/mystring.c +++ /dev/null @@ -1,257 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * String functions. - * - * equal(s1, s2) Return true if strings are equal. - * scopy(from, to) Copy a string. - * scopyn(from, to, n) Like scopy, but checks for overflow. - * number(s) Convert a string of digits to an integer. - * is_number(s) Return true if s is a string of digits. - */ - -#include <ctype.h> -#include <errno.h> -#include <inttypes.h> -#include <limits.h> -#include <inttypes.h> -#include <stdlib.h> -#include "shell.h" -#include "syntax.h" -#include "error.h" -#include "mystring.h" -#include "memalloc.h" -#include "parser.h" -#include "system.h" - - -char nullstr[1]; /* zero length string */ -const char spcstr[] = " "; -const char snlfmt[] = "%s\n"; -const char dolatstr[] = { CTLQUOTEMARK, CTLVAR, VSNORMAL, '@', '=', - CTLQUOTEMARK, '\0' }; -const char qchars[] = { CTLESC, CTLQUOTEMARK, 0 }; -const char illnum[] = "Illegal number: %s"; -const char homestr[] = "HOME"; - -/* - * equal - #defined in mystring.h - */ - -/* - * scopy - #defined in mystring.h - */ - - -#if 0 -/* - * scopyn - copy a string from "from" to "to", truncating the string - * if necessary. "To" is always nul terminated, even if - * truncation is performed. "Size" is the size of "to". - */ - -void -scopyn(const char *from, char *to, int size) -{ - - while (--size > 0) { - if ((*to++ = *from++) == '\0') - return; - } - *to = '\0'; -} -#endif - - -/* - * prefix -- see if pfx is a prefix of string. - */ - -char * -prefix(const char *string, const char *pfx) -{ - while (*pfx) { - if (*pfx++ != *string++) - return 0; - } - return (char *) string; -} - -void badnum(const char *s) -{ - sh_error(illnum, s); -} - -/* - * Convert a string into an integer of type intmax_t. Alow trailing spaces. - */ -intmax_t atomax(const char *s, int base) -{ - char *p; - intmax_t r; - - errno = 0; - r = strtoimax(s, &p, base); - - if (errno == ERANGE) - badnum(s); - - /* - * Disallow completely blank strings in non-arithmetic (base != 0) - * contexts. - */ - if (p == s && base) - badnum(s); - - while (isspace((unsigned char)*p)) - p++; - - if (*p) - badnum(s); - - return r; -} - -intmax_t atomax10(const char *s) -{ - return atomax(s, 10); -} - -/* - * Convert a string of digits to an integer, printing an error message on - * failure. - */ - -int -number(const char *s) -{ - intmax_t n = atomax10(s); - - if (n < 0 || n > INT_MAX) - badnum(s); - - return n; -} - - - -/* - * Check for a valid number. This should be elsewhere. - */ - -int -is_number(const char *p) -{ - do { - if (! is_digit(*p)) - return 0; - } while (*++p != '\0'); - return 1; -} - - -/* - * Produce a possibly single quoted string suitable as input to the shell. - * The return string is allocated on the stack. - */ - -char * -single_quote(const char *s) { - char *p; - - STARTSTACKSTR(p); - - do { - char *q; - size_t len; - - len = strchrnul(s, '\'') - s; - - q = p = makestrspace(len + 3, p); - - *q++ = '\''; - q = mempcpy(q, s, len); - *q++ = '\''; - s += len; - - STADJUST(q - p, p); - - len = strspn(s, "'"); - if (!len) - break; - - q = p = makestrspace(len + 3, p); - - *q++ = '"'; - q = mempcpy(q, s, len); - *q++ = '"'; - s += len; - - STADJUST(q - p, p); - } while (*s); - - USTPUTC(0, p); - - return stackblock(); -} - -/* - * Like strdup but works with the ash stack. - */ - -char * -sstrdup(const char *p) -{ - size_t len = strlen(p) + 1; - return memcpy(stalloc(len), p, len); -} - -/* - * Wrapper around strcmp for qsort/bsearch/... - */ -int -pstrcmp(const void *a, const void *b) -{ - return strcmp(*(const char *const *) a, *(const char *const *) b); -} - -/* - * Find a string is in a sorted array. - */ -const char *const * -findstring(const char *s, const char *const *array, size_t nmemb) -{ - return bsearch(&s, array, nmemb, sizeof(const char *), pstrcmp); -} diff --git a/bin/dash/src/mystring.h b/bin/dash/src/mystring.h deleted file mode 100644 index 083ea98c..00000000 --- a/bin/dash/src/mystring.h +++ /dev/null @@ -1,63 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)mystring.h 8.2 (Berkeley) 5/4/95 - */ - -#include <inttypes.h> -#include <string.h> - -extern const char snlfmt[]; -extern const char spcstr[]; -extern const char dolatstr[]; -#define DOLATSTRLEN 6 -extern const char qchars[]; -extern const char illnum[]; -extern const char homestr[]; - -#if 0 -void scopyn(const char *, char *, int); -#endif -char *prefix(const char *, const char *); -void badnum(const char *s) __attribute__ ((noreturn)); -intmax_t atomax(const char *, int); -intmax_t atomax10(const char *); -int number(const char *); -int is_number(const char *); -char *single_quote(const char *); -char *sstrdup(const char *); -int pstrcmp(const void *, const void *); -const char *const *findstring(const char *, const char *const *, size_t); - -#define equal(s1, s2) (strcmp(s1, s2) == 0) -#define scopy(s1, s2) ((void)strcpy(s2, s1)) diff --git a/bin/dash/src/nodes.c.pat b/bin/dash/src/nodes.c.pat deleted file mode 100644 index 9125bc73..00000000 --- a/bin/dash/src/nodes.c.pat +++ /dev/null @@ -1,166 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)nodes.c.pat 8.2 (Berkeley) 5/4/95 - */ - -#include <stdlib.h> -/* - * Routine for dealing with parsed shell commands. - */ - -#include "shell.h" -#include "nodes.h" -#include "memalloc.h" -#include "machdep.h" -#include "mystring.h" -#include "system.h" - - -int funcblocksize; /* size of structures in function */ -int funcstringsize; /* size of strings in node */ -pointer funcblock; /* block to allocate function from */ -char *funcstring; /* block to allocate strings from */ - -%SIZES - - -STATIC void calcsize(union node *); -STATIC void sizenodelist(struct nodelist *); -STATIC union node *copynode(union node *); -STATIC struct nodelist *copynodelist(struct nodelist *); -STATIC char *nodesavestr(char *); - - - -/* - * Make a copy of a parse tree. - */ - -struct funcnode * -copyfunc(union node *n) -{ - struct funcnode *f; - size_t blocksize; - - funcblocksize = offsetof(struct funcnode, n); - funcstringsize = 0; - calcsize(n); - blocksize = funcblocksize; - f = ckmalloc(blocksize + funcstringsize); - funcblock = (char *) f + offsetof(struct funcnode, n); - funcstring = (char *) f + blocksize; - copynode(n); - f->count = 0; - return f; -} - - - -STATIC void -calcsize(n) - union node *n; -{ - %CALCSIZE -} - - - -STATIC void -sizenodelist(lp) - struct nodelist *lp; -{ - while (lp) { - funcblocksize += SHELL_ALIGN(sizeof(struct nodelist)); - calcsize(lp->n); - lp = lp->next; - } -} - - - -STATIC union node * -copynode(n) - union node *n; -{ - union node *new; - - %COPY - return new; -} - - -STATIC struct nodelist * -copynodelist(lp) - struct nodelist *lp; -{ - struct nodelist *start; - struct nodelist **lpp; - - lpp = &start; - while (lp) { - *lpp = funcblock; - funcblock = (char *) funcblock + - SHELL_ALIGN(sizeof(struct nodelist)); - (*lpp)->n = copynode(lp->n); - lp = lp->next; - lpp = &(*lpp)->next; - } - *lpp = NULL; - return start; -} - - - -STATIC char * -nodesavestr(s) - char *s; -{ - char *rtn = funcstring; - - funcstring = stpcpy(funcstring, s) + 1; - return rtn; -} - - - -/* - * Free a parse tree. - */ - -void -freefunc(struct funcnode *f) -{ - if (f && --f->count < 0) - ckfree(f); -} diff --git a/bin/dash/src/nodetypes b/bin/dash/src/nodetypes deleted file mode 100644 index ceaf478c..00000000 --- a/bin/dash/src/nodetypes +++ /dev/null @@ -1,151 +0,0 @@ -# Copyright (c) 1991, 1993 -# The Regents of the University of California. All rights reserved. -# Copyright (c) 1997-2005 -# Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. -# -# This code is derived from software contributed to Berkeley by -# Kenneth Almquist. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions -# are met: -# 1. Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# 2. Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the distribution. -# 3. Neither the name of the University nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -# SUCH DAMAGE. -# -# @(#)nodetypes 8.2 (Berkeley) 5/4/95 - -# This file describes the nodes used in parse trees. Unindented lines -# contain a node type followed by a structure tag. Subsequent indented -# lines specify the fields of the structure. Several node types can share -# the same structure, in which case the fields of the structure should be -# specified only once. -# -# A field of a structure is described by the name of the field followed -# by a type. The currently implemented types are: -# nodeptr - a pointer to a node -# nodelist - a pointer to a list of nodes -# string - a pointer to a nul terminated string -# int - an integer -# other - any type that can be copied by assignment -# temp - a field that doesn't have to be copied when the node is copied -# The last two types should be followed by the text of a C declaration for -# the field. - -NCMD ncmd # a simple command - type int - linno int - assign nodeptr # variable assignments - args nodeptr # the arguments - redirect nodeptr # list of file redirections - -NPIPE npipe # a pipeline - type int - backgnd int # set to run pipeline in background - cmdlist nodelist # the commands in the pipeline - -NREDIR nredir # redirection (of a complex command) - type int - linno int - n nodeptr # the command - redirect nodeptr # list of file redirections - -NBACKGND nredir # run command in background -NSUBSHELL nredir # run command in a subshell - -NAND nbinary # the && operator -NOR nbinary # the || operator - -NSEMI nbinary # two commands separated by a semicolon - type int - ch1 nodeptr # the first child - ch2 nodeptr # the second child - -NIF nif # the if statement. Elif clauses are handled - type int # using multiple if nodes. - test nodeptr # if test - ifpart nodeptr # then ifpart - elsepart nodeptr # else elsepart - -NWHILE nbinary # the while statement. First child is the test -NUNTIL nbinary # the until statement - -NFOR nfor # the for statement - type int - linno int - args nodeptr # for var in args - body nodeptr # do body; done - var string # the for variable - -NCASE ncase # a case statement - type int - linno int - expr nodeptr # the word to switch on - cases nodeptr # the list of cases (NCLIST nodes) - -NCLIST nclist # a case - type int - next nodeptr # the next case in list - pattern nodeptr # list of patterns for this case - body nodeptr # code to execute for this case - - -NDEFUN ndefun # a function - type int - linno int - text string - body nodeptr - -NARG narg # represents a word - type int - next nodeptr # next word in list - text string # the text of the word - backquote nodelist # list of commands in back quotes - -NTO nfile # fd> fname -NCLOBBER nfile # fd>| fname -NFROM nfile # fd< fname -NFROMTO nfile # fd<> fname -NAPPEND nfile # fd>> fname - type int - next nodeptr # next redirection in list - fd int # file descriptor being redirected - fname nodeptr # file name, in a NARG node - expfname temp char *expfname # actual file name - -NTOFD ndup # fd<&dupfd -NFROMFD ndup # fd>&dupfd - type int - next nodeptr # next redirection in list - fd int # file descriptor being redirected - dupfd int # file descriptor to duplicate - vname nodeptr # file name if fd>&$var - - -NHERE nhere # fd<<\! -NXHERE nhere # fd<<! - type int - next nodeptr # next redirection in list - fd int # file descriptor being redirected - doc nodeptr # input to command (NARG node) - -NNOT nnot # ! command (actually pipeline) - type int - com nodeptr diff --git a/bin/dash/src/options.c b/bin/dash/src/options.c deleted file mode 100644 index a46c23b9..00000000 --- a/bin/dash/src/options.c +++ /dev/null @@ -1,558 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <signal.h> -#include <unistd.h> -#include <stdlib.h> - -#include "shell.h" -#define DEFINE_OPTIONS -#include "options.h" -#undef DEFINE_OPTIONS -#include "nodes.h" /* for other header files */ -#include "eval.h" -#include "jobs.h" -#include "input.h" -#include "output.h" -#include "trap.h" -#include "var.h" -#include "memalloc.h" -#include "error.h" -#include "mystring.h" -#ifndef SMALL -#include "myhistedit.h" -#endif -#include "show.h" - -char *arg0; /* value of $0 */ -struct shparam shellparam; /* current positional parameters */ -char **argptr; /* argument list for builtin commands */ -char *optionarg; /* set by nextopt (like getopt) */ -char *optptr; /* used by nextopt */ - -char *minusc; /* argument to -c option */ - -static const char *const optnames[NOPTS] = { - "errexit", - "noglob", - "ignoreeof", - "interactive", - "monitor", - "noexec", - "stdin", - "xtrace", - "verbose", - "vi", - "emacs", - "noclobber", - "allexport", - "notify", - "nounset", - "nolog", - "debug", -}; - -const char optletters[NOPTS] = { - 'e', - 'f', - 'I', - 'i', - 'm', - 'n', - 's', - 'x', - 'v', - 'V', - 'E', - 'C', - 'a', - 'b', - 'u', - 0, - 0, -}; - -char optlist[NOPTS]; - - -static int options(int); -STATIC void minus_o(char *, int); -STATIC void setoption(int, int); -STATIC int getopts(char *, char *, char **); - - -/* - * Process the shell command line arguments. - */ - -int -procargs(int argc, char **argv) -{ - int i; - const char *xminusc; - char **xargv; - int login; - - xargv = argv; - login = xargv[0] && xargv[0][0] == '-'; - arg0 = xargv[0]; - if (argc > 0) - xargv++; - for (i = 0; i < NOPTS; i++) - optlist[i] = 2; - argptr = xargv; - login |= options(1); - xargv = argptr; - xminusc = minusc; - if (*xargv == NULL) { - if (xminusc) - sh_error("-c requires an argument"); - sflag = 1; - } - if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1)) - iflag = 1; - if (mflag == 2) - mflag = iflag; - for (i = 0; i < NOPTS; i++) - if (optlist[i] == 2) - optlist[i] = 0; -#if DEBUG == 2 - debug = 1; -#endif - /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */ - if (xminusc) { - minusc = *xargv++; - if (*xargv) - goto setarg0; - } else if (!sflag) { - setinputfile(*xargv, 0); -setarg0: - arg0 = *xargv++; - } - - shellparam.p = xargv; - shellparam.optind = 1; - shellparam.optoff = -1; - /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */ - while (*xargv) { - shellparam.nparam++; - xargv++; - } - optschanged(); - - return login; -} - - -void -optschanged(void) -{ -#ifdef DEBUG - opentrace(); -#endif - setinteractive(iflag); -#ifndef SMALL - histedit(); -#endif - setjobctl(mflag); -} - -/* - * Process shell options. The global variable argptr contains a pointer - * to the argument list; we advance it past the options. - */ - -STATIC int -options(int cmdline) -{ - char *p; - int val; - int c; - int login = 0; - - if (cmdline) - minusc = NULL; - while ((p = *argptr) != NULL) { - argptr++; - if ((c = *p++) == '-') { - val = 1; - if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) { - if (!cmdline) { - /* "-" means turn off -x and -v */ - if (p[0] == '\0') - xflag = vflag = 0; - /* "--" means reset params */ - else if (*argptr == NULL) - setparam(argptr); - } - break; /* "-" or "--" terminates options */ - } - } else if (c == '+') { - val = 0; - } else { - argptr--; - break; - } - while ((c = *p++) != '\0') { - if (c == 'c' && cmdline) { - minusc = p; /* command is after shell args*/ - } else if (c == 'l' && cmdline) { - login = 1; - } else if (c == 'o') { - minus_o(*argptr, val); - if (*argptr) - argptr++; - } else { - setoption(c, val); - } - } - } - - return login; -} - -STATIC void -minus_o(char *name, int val) -{ - int i; - - if (name == NULL) { - if (val) { - out1str("Current option settings\n"); - for (i = 0; i < NOPTS; i++) - out1fmt("%-16s%s\n", optnames[i], - optlist[i] ? "on" : "off"); - } else { - for (i = 0; i < NOPTS; i++) - out1fmt("set %s %s\n", - optlist[i] ? "-o" : "+o", - optnames[i]); - - } - } else { - for (i = 0; i < NOPTS; i++) - if (equal(name, optnames[i])) { - optlist[i] = val; - return; - } - sh_error("Illegal option -o %s", name); - } -} - - -STATIC void -setoption(int flag, int val) -{ - int i; - - for (i = 0; i < NOPTS; i++) - if (optletters[i] == flag) { - optlist[i] = val; - if (val) { - /* #%$ hack for ksh semantics */ - if (flag == 'V') - Eflag = 0; - else if (flag == 'E') - Vflag = 0; - } - return; - } - sh_error("Illegal option -%c", flag); - /* NOTREACHED */ -} - - - -/* - * Set the shell parameters. - */ - -void -setparam(char **argv) -{ - char **newparam; - char **ap; - int nparam; - - for (nparam = 0 ; argv[nparam] ; nparam++); - ap = newparam = ckmalloc((nparam + 1) * sizeof *ap); - while (*argv) { - *ap++ = savestr(*argv++); - } - *ap = NULL; - freeparam(&shellparam); - shellparam.malloc = 1; - shellparam.nparam = nparam; - shellparam.p = newparam; - shellparam.optind = 1; - shellparam.optoff = -1; -} - - -/* - * Free the list of positional parameters. - */ - -void -freeparam(volatile struct shparam *param) -{ - char **ap; - - if (param->malloc) { - for (ap = param->p ; *ap ; ap++) - ckfree(*ap); - ckfree(param->p); - } -} - - - -/* - * The shift builtin command. - */ - -int -shiftcmd(int argc, char **argv) -{ - int n; - char **ap1, **ap2; - - n = 1; - if (argc > 1) - n = number(argv[1]); - if (n > shellparam.nparam) - sh_error("can't shift that many"); - INTOFF; - shellparam.nparam -= n; - for (ap1 = shellparam.p ; --n >= 0 ; ap1++) { - if (shellparam.malloc) - ckfree(*ap1); - } - ap2 = shellparam.p; - while ((*ap2++ = *ap1++) != NULL); - shellparam.optind = 1; - shellparam.optoff = -1; - INTON; - return 0; -} - - - -/* - * The set command builtin. - */ - -int -setcmd(int argc, char **argv) -{ - if (argc == 1) - return showvars(nullstr, 0, VUNSET); - INTOFF; - options(0); - optschanged(); - if (*argptr != NULL) { - setparam(argptr); - } - INTON; - return 0; -} - - -void -getoptsreset(value) - const char *value; -{ - shellparam.optind = number(value) ?: 1; - shellparam.optoff = -1; -} - -/* - * The getopts builtin. Shellparam.optnext points to the next argument - * to be processed. Shellparam.optptr points to the next character to - * be processed in the current argument. If shellparam.optnext is NULL, - * then it's the first time getopts has been called. - */ - -int -getoptscmd(int argc, char **argv) -{ - char **optbase; - - if (argc < 3) - sh_error("Usage: getopts optstring var [arg]"); - else if (argc == 3) { - optbase = shellparam.p; - if ((unsigned)shellparam.optind > shellparam.nparam + 1) { - shellparam.optind = 1; - shellparam.optoff = -1; - } - } - else { - optbase = &argv[3]; - if ((unsigned)shellparam.optind > argc - 2) { - shellparam.optind = 1; - shellparam.optoff = -1; - } - } - - return getopts(argv[1], argv[2], optbase); -} - -STATIC int -getopts(char *optstr, char *optvar, char **optfirst) -{ - char *p, *q; - char c = '?'; - int done = 0; - char s[2]; - char **optnext; - int ind = shellparam.optind; - int off = shellparam.optoff; - - shellparam.optind = -1; - optnext = optfirst + ind - 1; - - if (ind <= 1 || off < 0 || strlen(optnext[-1]) < off) - p = NULL; - else - p = optnext[-1] + off; - if (p == NULL || *p == '\0') { - /* Current word is done, advance */ - p = *optnext; - if (p == NULL || *p != '-' || *++p == '\0') { -atend: - p = NULL; - done = 1; - goto out; - } - optnext++; - if (p[0] == '-' && p[1] == '\0') /* check for "--" */ - goto atend; - } - - c = *p++; - for (q = optstr; *q != c; ) { - if (*q == '\0') { - if (optstr[0] == ':') { - s[0] = c; - s[1] = '\0'; - setvar("OPTARG", s, 0); - } else { - outfmt(&errout, "Illegal option -%c\n", c); - (void) unsetvar("OPTARG"); - } - c = '?'; - goto out; - } - if (*++q == ':') - q++; - } - - if (*++q == ':') { - if (*p == '\0' && (p = *optnext) == NULL) { - if (optstr[0] == ':') { - s[0] = c; - s[1] = '\0'; - setvar("OPTARG", s, 0); - c = ':'; - } else { - outfmt(&errout, "No arg for -%c option\n", c); - (void) unsetvar("OPTARG"); - c = '?'; - } - goto out; - } - - if (p == *optnext) - optnext++; - setvar("OPTARG", p, 0); - p = NULL; - } else - setvar("OPTARG", nullstr, 0); - -out: - ind = optnext - optfirst + 1; - setvarint("OPTIND", ind, VNOFUNC); - s[0] = c; - s[1] = '\0'; - setvar(optvar, s, 0); - - shellparam.optoff = p ? p - *(optnext - 1) : -1; - shellparam.optind = ind; - - return done; -} - -/* - * XXX - should get rid of. have all builtins use getopt(3). the - * library getopt must have the BSD extension static variable "optreset" - * otherwise it can't be used within the shell safely. - * - * Standard option processing (a la getopt) for builtin routines. The - * only argument that is passed to nextopt is the option string; the - * other arguments are unnecessary. It return the character, or '\0' on - * end of input. - */ - -int -nextopt(const char *optstring) -{ - char *p; - const char *q; - char c; - - if ((p = optptr) == NULL || *p == '\0') { - p = *argptr; - if (p == NULL || *p != '-' || *++p == '\0') - return '\0'; - argptr++; - if (p[0] == '-' && p[1] == '\0') /* check for "--" */ - return '\0'; - } - c = *p++; - for (q = optstring ; *q != c ; ) { - if (*q == '\0') - sh_error("Illegal option -%c", c); - if (*++q == ':') - q++; - } - if (*++q == ':') { - if (*p == '\0' && (p = *argptr++) == NULL) - sh_error("No arg for -%c option", c); - optionarg = p; - p = NULL; - } - optptr = p; - return c; -} diff --git a/bin/dash/src/options.h b/bin/dash/src/options.h deleted file mode 100644 index 975fe339..00000000 --- a/bin/dash/src/options.h +++ /dev/null @@ -1,86 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)options.h 8.2 (Berkeley) 5/4/95 - */ - -struct shparam { - int nparam; /* # of positional parameters (without $0) */ - unsigned char malloc; /* if parameter list dynamically allocated */ - char **p; /* parameter list */ - int optind; /* next parameter to be processed by getopts */ - int optoff; /* used by getopts */ -}; - - - -#define eflag optlist[0] -#define fflag optlist[1] -#define Iflag optlist[2] -#define iflag optlist[3] -#define mflag optlist[4] -#define nflag optlist[5] -#define sflag optlist[6] -#define xflag optlist[7] -#define vflag optlist[8] -#define Vflag optlist[9] -#define Eflag optlist[10] -#define Cflag optlist[11] -#define aflag optlist[12] -#define bflag optlist[13] -#define uflag optlist[14] -#define nolog optlist[15] -#define debug optlist[16] - -#define NOPTS 17 - -extern const char optletters[NOPTS]; -extern char optlist[NOPTS]; - - -extern char *minusc; /* argument to -c option */ -extern char *arg0; /* $0 */ -extern struct shparam shellparam; /* $@ */ -extern char **argptr; /* argument list for builtin commands */ -extern char *optionarg; /* set by nextopt */ -extern char *optptr; /* used by nextopt */ - -int procargs(int, char **); -void optschanged(void); -void setparam(char **); -void freeparam(volatile struct shparam *); -int shiftcmd(int, char **); -int setcmd(int, char **); -int getoptscmd(int, char **); -int nextopt(const char *); -void getoptsreset(const char *); diff --git a/bin/dash/src/output.c b/bin/dash/src/output.c deleted file mode 100644 index e9ee9b4d..00000000 --- a/bin/dash/src/output.c +++ /dev/null @@ -1,429 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Shell output routines. We use our own output routines because: - * When a builtin command is interrupted we have to discard - * any pending output. - * When a builtin command appears in back quotes, we want to - * save the output of the command in a region obtained - * via malloc, rather than doing a fork and reading the - * output of the command via a pipe. - * Our output routines may be smaller than the stdio routines. - */ - -#include <sys/types.h> /* quad_t */ -#include <sys/param.h> /* BSD4_4 */ -#include <sys/ioctl.h> - -#include <stdio.h> /* defines BUFSIZ */ -#include <string.h> -#include <unistd.h> -#include <stdlib.h> -#ifdef USE_GLIBC_STDIO -#include <fcntl.h> -#endif -#include <limits.h> - -#include "shell.h" -#include "syntax.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "main.h" -#include "system.h" - - -#define OUTBUFSIZ BUFSIZ -#define MEM_OUT -3 /* output to dynamically allocated memory */ - - -#ifdef USE_GLIBC_STDIO -struct output output = { - .stream = 0, .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = 1, .flags = 0 -}; -struct output errout = { - .stream = 0, .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = 2, .flags = 0 -} -#ifdef notyet -struct output memout = { - .stream = 0, .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = MEM_OUT, .flags = 0 -}; -#endif -#else -struct output output = { - .nextc = 0, .end = 0, .buf = 0, .bufsize = OUTBUFSIZ, .fd = 1, .flags = 0 -}; -struct output errout = { - .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = 2, .flags = 0 -}; -struct output preverrout; -#ifdef notyet -struct output memout = { - .nextc = 0, .end = 0, .buf = 0, .bufsize = 0, .fd = MEM_OUT, .flags = 0 -}; -#endif -#endif -struct output *out1 = &output; -struct output *out2 = &errout; - - -static int xvsnprintf(char *, size_t, const char *, va_list); - - -#ifdef mkinit - -INCLUDE "output.h" -INCLUDE "memalloc.h" - -INIT { -#ifdef USE_GLIBC_STDIO - initstreams(); -#endif -} - -RESET { -#ifdef notyet - out1 = &output; - out2 = &errout; -#ifdef USE_GLIBC_STDIO - if (memout.stream != NULL) - __closememout(); -#endif - if (memout.buf != NULL) { - ckfree(memout.buf); - memout.buf = NULL; - } -#endif -} - -#endif - - -void -outmem(const char *p, size_t len, struct output *dest) -{ -#ifdef USE_GLIBC_STDIO - INTOFF; - fwrite(p, 1, len, dest->stream); - INTON; -#else - size_t bufsize; - size_t offset; - size_t nleft; - - nleft = dest->end - dest->nextc; - if (likely(nleft >= len)) { -buffered: - dest->nextc = mempcpy(dest->nextc, p, len); - return; - } - - bufsize = dest->bufsize; - if (!bufsize) { - ; - } else if (dest->buf == NULL) { -#ifdef notyet - if (dest->fd == MEM_OUT && len > bufsize) { - bufsize = len; - } -#endif - offset = 0; -#ifdef notyet - goto alloc; - } else if (dest->fd == MEM_OUT) { - offset = bufsize; - if (bufsize >= len) { - bufsize <<= 1; - } else { - bufsize += len; - } - if (bufsize < offset) - goto err; -alloc: -#endif - INTOFF; - dest->buf = ckrealloc(dest->buf, bufsize); - dest->bufsize = bufsize; - dest->end = dest->buf + bufsize; - dest->nextc = dest->buf + offset; - INTON; - } else { - flushout(dest); - } - - nleft = dest->end - dest->nextc; - if (nleft > len) - goto buffered; - - if ((xwrite(dest->fd, p, len))) { -#ifdef notyet -err: -#endif - dest->flags |= OUTPUT_ERR; - } -#endif -} - - -void -outstr(const char *p, struct output *file) -{ -#ifdef USE_GLIBC_STDIO - INTOFF; - fputs(p, file->stream); - INTON; -#else - size_t len; - - len = strlen(p); - outmem(p, len, file); -#endif -} - - -#ifndef USE_GLIBC_STDIO - - -void -outcslow(int c, struct output *dest) -{ - char buf = c; - outmem(&buf, 1, dest); -} -#endif - - -void -flushall(void) -{ - flushout(&output); -#ifdef FLUSHERR - flushout(&errout); -#endif -} - - -void -flushout(struct output *dest) -{ -#ifdef USE_GLIBC_STDIO - INTOFF; - fflush(dest->stream); - INTON; -#else - size_t len; - - len = dest->nextc - dest->buf; - if (!len || dest->fd < 0) - return; - dest->nextc = dest->buf; - if ((xwrite(dest->fd, dest->buf, len))) - dest->flags |= OUTPUT_ERR; -#endif -} - - -void -outfmt(struct output *file, const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - doformat(file, fmt, ap); - va_end(ap); -} - - -void -out1fmt(const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - doformat(out1, fmt, ap); - va_end(ap); -} - - -int -fmtstr(char *outbuf, size_t length, const char *fmt, ...) -{ - va_list ap; - int ret; - - va_start(ap, fmt); - ret = xvsnprintf(outbuf, length, fmt, ap); - va_end(ap); - return ret > (int)length ? length : ret; -} - - -static int xvasprintf(char **sp, size_t size, const char *f, va_list ap) -{ - char *s; - int len; - va_list ap2; - - va_copy(ap2, ap); - len = xvsnprintf(*sp, size, f, ap2); - va_end(ap2); - if (len < 0) - sh_error("xvsnprintf failed"); - if (len < size) - return len; - - s = stalloc((len >= stackblocksize() ? len : stackblocksize()) + 1); - *sp = s; - len = xvsnprintf(s, len + 1, f, ap); - return len; -} - - -int xasprintf(char **sp, const char *f, ...) -{ - va_list ap; - int ret; - - va_start(ap, f); - ret = xvasprintf(sp, 0, f, ap); - va_end(ap); - return ret; -} - - -#ifndef USE_GLIBC_STDIO -void -doformat(struct output *dest, const char *f, va_list ap) -{ - struct stackmark smark; - char *s; - int len; - int olen; - - setstackmark(&smark); - s = dest->nextc; - olen = dest->end - dest->nextc; - len = xvasprintf(&s, olen, f, ap); - if (likely(olen > len)) { - dest->nextc += len; - goto out; - } - outmem(s, len, dest); -out: - popstackmark(&smark); -} -#endif - - - -/* - * Version of write which resumes after a signal is caught. - */ - -int -xwrite(int fd, const void *p, size_t n) -{ - const char *buf = p; - - while (n) { - ssize_t i; - size_t m; - - m = n; - if (m > SSIZE_MAX) - m = SSIZE_MAX; - do { - i = write(fd, buf, m); - } while (i < 0 && errno == EINTR); - if (i < 0) - return -1; - buf += i; - n -= i; - } - return 0; -} - - -#ifdef notyet -#ifdef USE_GLIBC_STDIO -void initstreams() { - output.stream = stdout; - errout.stream = stderr; -} - - -void -openmemout(void) { - INTOFF; - memout.stream = open_memstream(&memout.buf, &memout.bufsize); - INTON; -} - - -int -__closememout(void) { - int error; - error = fclose(memout.stream); - memout.stream = NULL; - return error; -} -#endif -#endif - - -static int -xvsnprintf(char *outbuf, size_t length, const char *fmt, va_list ap) -{ - int ret; - -#ifdef __sun - /* - * vsnprintf() on older versions of Solaris returns -1 when - * passed a length of 0. To avoid this, use a dummy - * 1-character buffer instead. - */ - char dummy[1]; - - if (length == 0) { - outbuf = dummy; - length = sizeof(dummy); - } -#endif - - INTOFF; - ret = vsnprintf(outbuf, length, fmt, ap); - INTON; - return ret; -} diff --git a/bin/dash/src/output.h b/bin/dash/src/output.h deleted file mode 100644 index c43d4937..00000000 --- a/bin/dash/src/output.h +++ /dev/null @@ -1,126 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)output.h 8.2 (Berkeley) 5/4/95 - */ - -#ifndef OUTPUT_INCL - -#include <stdarg.h> -#ifdef USE_GLIBC_STDIO -#include <stdio.h> -#endif -#include <sys/types.h> - -struct output { -#ifdef USE_GLIBC_STDIO - FILE *stream; -#endif - char *nextc; - char *end; - char *buf; - size_t bufsize; - int fd; - int flags; -}; - -extern struct output output; -extern struct output errout; -extern struct output preverrout; -#ifdef notyet -extern struct output memout; -#endif -extern struct output *out1; -extern struct output *out2; - -void outmem(const char *, size_t, struct output *); -void outstr(const char *, struct output *); -#ifndef USE_GLIBC_STDIO -void outcslow(int, struct output *); -#endif -void flushall(void); -void flushout(struct output *); -void outfmt(struct output *, const char *, ...) - __attribute__((__format__(__printf__,2,3))); -void out1fmt(const char *, ...) - __attribute__((__format__(__printf__,1,2))); -int fmtstr(char *, size_t, const char *, ...) - __attribute__((__format__(__printf__,3,4))); -int xasprintf(char **, const char *, ...); -#ifndef USE_GLIBC_STDIO -void doformat(struct output *, const char *, va_list); -#endif -int xwrite(int, const void *, size_t); -#ifdef notyet -#ifdef USE_GLIBC_STDIO -void initstreams(void); -void openmemout(void); -int __closememout(void); -#endif -#endif - -static inline void -freestdout() -{ - output.nextc = output.buf; - output.flags = 0; -} - -#define OUTPUT_ERR 01 /* error occurred on output */ - -#ifdef USE_GLIBC_STDIO -static inline void outc(int ch, struct output *file) -{ - putc(ch, file->stream); -} -#define doformat(d, f, a) vfprintf((d)->stream, (f), (a)) -#else -static inline void outc(int ch, struct output *file) -{ - if (file->nextc == file->end) - outcslow(ch, file); - else { - *file->nextc = ch; - file->nextc++; - } -} -#endif -#define out1c(c) outc((c), out1) -#define out2c(c) outcslow((c), out2) -#define out1mem(s, l) outmem((s), (l), out1) -#define out1str(s) outstr((s), out1) -#define out2str(s) outstr((s), out2) -#define outerr(f) (f)->flags - -#define OUTPUT_INCL -#endif diff --git a/bin/dash/src/parser.c b/bin/dash/src/parser.c deleted file mode 100644 index 499f7f8e..00000000 --- a/bin/dash/src/parser.c +++ /dev/null @@ -1,1677 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#if HAVE_ALLOCA_H -#include <alloca.h> -#endif - -#include <stdlib.h> - -#include "shell.h" -#include "parser.h" -#include "nodes.h" -#include "expand.h" /* defines rmescapes() */ -#include "exec.h" /* defines find_builtin() */ -#include "syntax.h" -#include "options.h" -#include "input.h" -#include "output.h" -#include "var.h" -#include "error.h" -#include "memalloc.h" -#include "mystring.h" -#include "alias.h" -#include "show.h" -#include "builtins.h" -#include "system.h" -#ifndef SMALL -#include "myhistedit.h" -#endif - -/* - * Shell command parser. - */ - -/* values returned by readtoken */ -#include "token_vars.h" - - - -/* Used by expandstr to get here-doc like behaviour. */ -#define FAKEEOFMARK (char *)1 - - - -struct heredoc { - struct heredoc *next; /* next here document in list */ - union node *here; /* redirection node */ - char *eofmark; /* string indicating end of input */ - int striptabs; /* if set, strip leading tabs */ -}; - -struct synstack { - const char *syntax; - struct synstack *prev; - struct synstack *next; - int innerdq; - int varpushed; - int dblquote; - int varnest; /* levels of variables expansion */ - int parenlevel; /* levels of parens in arithmetic */ - int dqvarnest; /* levels of variables expansion within double quotes */ -}; - - - -struct heredoc *heredoclist; /* list of here documents to read */ -int doprompt; /* if set, prompt the user */ -int needprompt; /* true if interactive and at start of line */ -int lasttoken; /* last token read */ -int tokpushback; /* last token pushed back */ -char *wordtext; /* text of last word returned by readtoken */ -int checkkwd; -struct nodelist *backquotelist; -union node *redirnode; -struct heredoc *heredoc; -int quoteflag; /* set if (part of) last token was quoted */ - - -static char *promptcache; -static char *rpromptcache; - - -STATIC union node *list(int); -STATIC union node *andor(void); -STATIC union node *pipeline(void); -STATIC union node *command(void); -STATIC union node *simplecmd(void); -STATIC union node *makename(void); -STATIC void parsefname(void); -STATIC void parseheredoc(void); -STATIC int readtoken(void); -STATIC int xxreadtoken(void); -STATIC int pgetc_eatbnl(); -STATIC int readtoken1(int, char const *, char *, int); -STATIC void synexpect(int) __attribute__((__noreturn__)); -STATIC void synerror(const char *) __attribute__((__noreturn__)); -STATIC void setprompt(int); - - -int isassignment(const char *p) -{ - const char *q = endofname(p); - if (p == q) - return 0; - return *q == '='; -} - -static inline int realeofmark(const char *eofmark) -{ - return eofmark && eofmark != FAKEEOFMARK; -} - - -/* - * Read and parse a command. Returns NEOF on end of file. (NULL is a - * valid parse tree indicating a blank line.) - */ - -union node * -parsecmd(int interact) -{ - tokpushback = 0; - checkkwd = 0; - heredoclist = 0; - doprompt = interact; - if (doprompt) - setprompt(doprompt); - needprompt = 0; - return list(1); -} - - -STATIC union node * -list(int nlflag) -{ - int chknl = nlflag & 1 ? 0 : CHKNL; - union node *n1, *n2, *n3; - int tok; - - n1 = NULL; - for (;;) { - checkkwd = chknl | CHKKWD | CHKALIAS; - tok = readtoken(); - switch (tok) { - case TNL: - parseheredoc(); - return n1; - - case TEOF: - if (!n1 && !chknl) - n1 = NEOF; -out_eof: - parseheredoc(); - tokpushback++; - lasttoken = TEOF; - return n1; - } - - tokpushback++; - if (nlflag == 2 && tokendlist[tok]) - return n1; - nlflag |= 2; - - n2 = andor(); - tok = readtoken(); - if (tok == TBACKGND) { - if (n2->type == NPIPE) { - n2->npipe.backgnd = 1; - } else { - if (n2->type != NREDIR) { - n3 = stalloc(sizeof(struct nredir)); - n3->nredir.n = n2; - n3->nredir.redirect = NULL; - n2 = n3; - } - n2->type = NBACKGND; - } - } - if (n1 == NULL) { - n1 = n2; - } - else { - n3 = (union node *)stalloc(sizeof (struct nbinary)); - n3->type = NSEMI; - n3->nbinary.ch1 = n1; - n3->nbinary.ch2 = n2; - n1 = n3; - } - switch (tok) { - case TEOF: - goto out_eof; - case TNL: - tokpushback++; - /* fall through */ - case TBACKGND: - case TSEMI: - break; - default: - if (!chknl) - synexpect(-1); - tokpushback++; - return n1; - } - } -} - - - -STATIC union node * -andor(void) -{ - union node *n1, *n2, *n3; - int t; - - n1 = pipeline(); - for (;;) { - if ((t = readtoken()) == TAND) { - t = NAND; - } else if (t == TOR) { - t = NOR; - } else { - tokpushback++; - return n1; - } - checkkwd = CHKNL | CHKKWD | CHKALIAS; - n2 = pipeline(); - n3 = (union node *)stalloc(sizeof (struct nbinary)); - n3->type = t; - n3->nbinary.ch1 = n1; - n3->nbinary.ch2 = n2; - n1 = n3; - } -} - - - -STATIC union node * -pipeline(void) -{ - union node *n1, *n2, *pipenode; - struct nodelist *lp, *prev; - int negate; - - negate = 0; - TRACE(("pipeline: entered\n")); - if (readtoken() == TNOT) { - negate = !negate; - checkkwd = CHKKWD | CHKALIAS; - } else - tokpushback++; - n1 = command(); - if (readtoken() == TPIPE) { - pipenode = (union node *)stalloc(sizeof (struct npipe)); - pipenode->type = NPIPE; - pipenode->npipe.backgnd = 0; - lp = (struct nodelist *)stalloc(sizeof (struct nodelist)); - pipenode->npipe.cmdlist = lp; - lp->n = n1; - do { - prev = lp; - lp = (struct nodelist *)stalloc(sizeof (struct nodelist)); - checkkwd = CHKNL | CHKKWD | CHKALIAS; - lp->n = command(); - prev->next = lp; - } while (readtoken() == TPIPE); - lp->next = NULL; - n1 = pipenode; - } - tokpushback++; - if (negate) { - n2 = (union node *)stalloc(sizeof (struct nnot)); - n2->type = NNOT; - n2->nnot.com = n1; - return n2; - } else - return n1; -} - - - -STATIC union node * -command(void) -{ - union node *n1, *n2; - union node *ap, **app; - union node *cp, **cpp; - union node *redir, **rpp; - union node **rpp2; - int t; - int savelinno; - - redir = NULL; - rpp2 = &redir; - - savelinno = plinno; - - switch (readtoken()) { - default: - synexpect(-1); - /* NOTREACHED */ - case TIF: - n1 = (union node *)stalloc(sizeof (struct nif)); - n1->type = NIF; - n1->nif.test = list(0); - if (readtoken() != TTHEN) - synexpect(TTHEN); - n1->nif.ifpart = list(0); - n2 = n1; - while (readtoken() == TELIF) { - n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif)); - n2 = n2->nif.elsepart; - n2->type = NIF; - n2->nif.test = list(0); - if (readtoken() != TTHEN) - synexpect(TTHEN); - n2->nif.ifpart = list(0); - } - if (lasttoken == TELSE) - n2->nif.elsepart = list(0); - else { - n2->nif.elsepart = NULL; - tokpushback++; - } - t = TFI; - break; - case TWHILE: - case TUNTIL: { - int got; - n1 = (union node *)stalloc(sizeof (struct nbinary)); - n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL; - n1->nbinary.ch1 = list(0); - if ((got=readtoken()) != TDO) { -TRACE(("expecting DO got %s %s\n", tokname[got], got == TWORD ? wordtext : "")); - synexpect(TDO); - } - n1->nbinary.ch2 = list(0); - t = TDONE; - break; - } - case TFOR: - if (readtoken() != TWORD || quoteflag || ! goodname(wordtext)) - synerror("Bad for loop variable"); - n1 = (union node *)stalloc(sizeof (struct nfor)); - n1->type = NFOR; - n1->nfor.linno = savelinno; - n1->nfor.var = wordtext; - checkkwd = CHKNL | CHKKWD | CHKALIAS; - if (readtoken() == TIN) { - app = ≈ - while (readtoken() == TWORD) { - n2 = (union node *)stalloc(sizeof (struct narg)); - n2->type = NARG; - n2->narg.text = wordtext; - n2->narg.backquote = backquotelist; - *app = n2; - app = &n2->narg.next; - } - *app = NULL; - n1->nfor.args = ap; - if (lasttoken != TNL && lasttoken != TSEMI) - synexpect(-1); - } else { - n2 = (union node *)stalloc(sizeof (struct narg)); - n2->type = NARG; - n2->narg.text = (char *)dolatstr; - n2->narg.backquote = NULL; - n2->narg.next = NULL; - n1->nfor.args = n2; - /* - * Newline or semicolon here is optional (but note - * that the original Bourne shell only allowed NL). - */ - if (lasttoken != TSEMI) - tokpushback++; - } - checkkwd = CHKNL | CHKKWD | CHKALIAS; - if (readtoken() != TDO) - synexpect(TDO); - n1->nfor.body = list(0); - t = TDONE; - break; - case TCASE: - n1 = (union node *)stalloc(sizeof (struct ncase)); - n1->type = NCASE; - n1->ncase.linno = savelinno; - if (readtoken() != TWORD) - synexpect(TWORD); - n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg)); - n2->type = NARG; - n2->narg.text = wordtext; - n2->narg.backquote = backquotelist; - n2->narg.next = NULL; - checkkwd = CHKNL | CHKKWD | CHKALIAS; - if (readtoken() != TIN) - synexpect(TIN); - cpp = &n1->ncase.cases; -next_case: - checkkwd = CHKNL | CHKKWD; - t = readtoken(); - while(t != TESAC) { - if (lasttoken == TLP) - readtoken(); - *cpp = cp = (union node *)stalloc(sizeof (struct nclist)); - cp->type = NCLIST; - app = &cp->nclist.pattern; - for (;;) { - *app = ap = (union node *)stalloc(sizeof (struct narg)); - ap->type = NARG; - ap->narg.text = wordtext; - ap->narg.backquote = backquotelist; - if (readtoken() != TPIPE) - break; - app = &ap->narg.next; - readtoken(); - } - ap->narg.next = NULL; - if (lasttoken != TRP) - synexpect(TRP); - cp->nclist.body = list(2); - - cpp = &cp->nclist.next; - - checkkwd = CHKNL | CHKKWD; - if ((t = readtoken()) != TESAC) { - if (t != TENDCASE) - synexpect(TENDCASE); - else - goto next_case; - } - } - *cpp = NULL; - goto redir; - case TLP: - n1 = (union node *)stalloc(sizeof (struct nredir)); - n1->type = NSUBSHELL; - n1->nredir.linno = savelinno; - n1->nredir.n = list(0); - n1->nredir.redirect = NULL; - t = TRP; - break; - case TBEGIN: - n1 = list(0); - t = TEND; - break; - case TWORD: - case TREDIR: - tokpushback++; - return simplecmd(); - } - - if (readtoken() != t) - synexpect(t); - -redir: - /* Now check for redirection which may follow command */ - checkkwd = CHKKWD | CHKALIAS; - rpp = rpp2; - while (readtoken() == TREDIR) { - *rpp = n2 = redirnode; - rpp = &n2->nfile.next; - parsefname(); - } - tokpushback++; - *rpp = NULL; - if (redir) { - if (n1->type != NSUBSHELL) { - n2 = (union node *)stalloc(sizeof (struct nredir)); - n2->type = NREDIR; - n2->nredir.linno = savelinno; - n2->nredir.n = n1; - n1 = n2; - } - n1->nredir.redirect = redir; - } - - return n1; -} - - -STATIC union node * -simplecmd(void) { - union node *args, **app; - union node *n = NULL; - union node *vars, **vpp; - union node **rpp, *redir; - int savecheckkwd; - int savelinno; - - args = NULL; - app = &args; - vars = NULL; - vpp = &vars; - redir = NULL; - rpp = &redir; - - savecheckkwd = CHKALIAS; - savelinno = plinno; - for (;;) { - checkkwd = savecheckkwd; - switch (readtoken()) { - case TWORD: - n = (union node *)stalloc(sizeof (struct narg)); - n->type = NARG; - n->narg.text = wordtext; - n->narg.backquote = backquotelist; - if (savecheckkwd && isassignment(wordtext)) { - *vpp = n; - vpp = &n->narg.next; - } else { - *app = n; - app = &n->narg.next; - savecheckkwd = 0; - } - break; - case TREDIR: - *rpp = n = redirnode; - rpp = &n->nfile.next; - parsefname(); /* read name of redirection file */ - break; - case TLP: - if ( - args && app == &args->narg.next && - !vars && !redir - ) { - struct builtincmd *bcmd; - const char *name; - - /* We have a function */ - if (readtoken() != TRP) - synexpect(TRP); - name = n->narg.text; - if ( - !goodname(name) || ( - (bcmd = find_builtin(name)) && - bcmd->flags & BUILTIN_SPECIAL - ) - ) - synerror("Bad function name"); - n->type = NDEFUN; - checkkwd = CHKNL | CHKKWD | CHKALIAS; - n->ndefun.text = n->narg.text; - n->ndefun.linno = plinno; - n->ndefun.body = command(); - return n; - } - /* fall through */ - default: - tokpushback++; - goto out; - } - } -out: - *app = NULL; - *vpp = NULL; - *rpp = NULL; - n = (union node *)stalloc(sizeof (struct ncmd)); - n->type = NCMD; - n->ncmd.linno = savelinno; - n->ncmd.args = args; - n->ncmd.assign = vars; - n->ncmd.redirect = redir; - return n; -} - -STATIC union node * -makename(void) -{ - union node *n; - - n = (union node *)stalloc(sizeof (struct narg)); - n->type = NARG; - n->narg.next = NULL; - n->narg.text = wordtext; - n->narg.backquote = backquotelist; - return n; -} - -void fixredir(union node *n, const char *text, int err) - { - TRACE(("Fix redir %s %d\n", text, err)); - if (!err) - n->ndup.vname = NULL; - - if (is_digit(text[0]) && text[1] == '\0') - n->ndup.dupfd = digit_val(text[0]); - else if (text[0] == '-' && text[1] == '\0') - n->ndup.dupfd = -1; - else { - - if (err) - synerror("Bad fd number"); - else - n->ndup.vname = makename(); - } -} - - -STATIC void -parsefname(void) -{ - union node *n = redirnode; - - if (n->type == NHERE) - checkkwd = CHKEOFMARK; - if (readtoken() != TWORD) - synexpect(-1); - if (n->type == NHERE) { - struct heredoc *here = heredoc; - struct heredoc *p; - - if (quoteflag == 0) - n->type = NXHERE; - TRACE(("Here document %d\n", n->type)); - rmescapes(wordtext); - here->eofmark = wordtext; - here->next = NULL; - if (heredoclist == NULL) - heredoclist = here; - else { - for (p = heredoclist ; p->next ; p = p->next); - p->next = here; - } - } else if (n->type == NTOFD || n->type == NFROMFD) { - fixredir(n, wordtext, 0); - } else { - n->nfile.fname = makename(); - } -} - - -/* - * Input any here documents. - */ - -STATIC void -parseheredoc(void) -{ - struct heredoc *here; - union node *n; - - here = heredoclist; - heredoclist = 0; - - while (here) { - if (needprompt) { - setprompt(2); - } - if (here->here->type == NHERE) - readtoken1(pgetc(), SQSYNTAX, here->eofmark, here->striptabs); - else - readtoken1(pgetc_eatbnl(), DQSYNTAX, here->eofmark, here->striptabs); - n = (union node *)stalloc(sizeof (struct narg)); - n->narg.type = NARG; - n->narg.next = NULL; - n->narg.text = wordtext; - n->narg.backquote = backquotelist; - here->here->nhere.doc = n; - here = here->next; - } -} - -STATIC int -readtoken(void) -{ - int t; - int kwd = checkkwd; -#ifdef DEBUG - int alreadyseen = tokpushback; -#endif - -top: - t = xxreadtoken(); - - /* - * eat newlines - */ - if (kwd & CHKNL) { - while (t == TNL) { - parseheredoc(); - checkkwd = 0; - t = xxreadtoken(); - } - } - - kwd |= checkkwd; - checkkwd = 0; - - if (t != TWORD || quoteflag) { - goto out; - } - - /* - * check for keywords - */ - if (kwd & CHKKWD) { - const char *const *pp; - - if ((pp = findkwd(wordtext))) { - lasttoken = t = pp - parsekwd + KWDOFFSET; - TRACE(("keyword %s recognized\n", tokname[t])); - goto out; - } - } - - if (kwd & CHKALIAS) { - struct alias *ap; - if ((ap = lookupalias(wordtext, 1)) != NULL) { - if (*ap->val) { - pushstring(ap->val, ap); - } - goto top; - } - } -out: -#ifdef DEBUG - if (!alreadyseen) - TRACE(("token %s %s\n", tokname[t], t == TWORD ? wordtext : "")); - else - TRACE(("reread token %s %s\n", tokname[t], t == TWORD ? wordtext : "")); -#endif - return (t); -} - -static void nlprompt(void) -{ - plinno++; - if (doprompt) - setprompt(2); -} - -static void nlnoprompt(void) -{ - plinno++; - needprompt = doprompt; -} - - -/* - * Read the next input token. - * If the token is a word, we set backquotelist to the list of cmds in - * backquotes. We set quoteflag to true if any part of the word was - * quoted. - * If the token is TREDIR, then we set redirnode to a structure containing - * the redirection. - * - * [Change comment: here documents and internal procedures] - * [Readtoken shouldn't have any arguments. Perhaps we should make the - * word parsing code into a separate routine. In this case, readtoken - * doesn't need to have any internal procedures, but parseword does. - * We could also make parseoperator in essence the main routine, and - * have parseword (readtoken1?) handle both words and redirection.] - */ - -#define RETURN(token) return lasttoken = token - -STATIC int -xxreadtoken(void) -{ - int c; - - if (tokpushback) { - tokpushback = 0; - return lasttoken; - } - if (needprompt) { - setprompt(2); - } - for (;;) { /* until token or start of word found */ - c = pgetc_eatbnl(); - switch (c) { - case ' ': case '\t': - case PEOA: - continue; - case '#': - while ((c = pgetc()) != '\n' && c != PEOF); - pungetc(); - continue; - case '\n': - nlnoprompt(); - RETURN(TNL); - case PEOF: - RETURN(TEOF); - case '&': - if (pgetc_eatbnl() == '&') - RETURN(TAND); - pungetc(); - RETURN(TBACKGND); - case '|': - if (pgetc_eatbnl() == '|') - RETURN(TOR); - pungetc(); - RETURN(TPIPE); - case ';': - if (pgetc_eatbnl() == ';') - RETURN(TENDCASE); - pungetc(); - RETURN(TSEMI); - case '(': - RETURN(TLP); - case ')': - RETURN(TRP); - } - break; - } - return readtoken1(c, BASESYNTAX, (char *)NULL, 0); -#undef RETURN -} - -static int pgetc_eatbnl(void) -{ - int c; - - while ((c = pgetc()) == '\\') { - if (pgetc2() != '\n') { - pungetc(); - break; - } - - nlprompt(); - } - - return c; -} - -static int pgetc_top(struct synstack *stack) -{ - return stack->syntax == SQSYNTAX ? pgetc() : pgetc_eatbnl(); -} - -static void synstack_push(struct synstack **stack, struct synstack *next, - const char *syntax) -{ - memset(next, 0, sizeof(*next)); - next->syntax = syntax; - next->next = *stack; - (*stack)->prev = next; - *stack = next; -} - -static void synstack_pop(struct synstack **stack) -{ - *stack = (*stack)->next; -} - - - -/* - * If eofmark is NULL, read a word or a redirection symbol. If eofmark - * is not NULL, read a here document. In the latter case, eofmark is the - * word which marks the end of the document and striptabs is true if - * leading tabs should be stripped from the document. The argument firstc - * is the first character of the input token or document. - * - * Because C does not have internal subroutines, I have simulated them - * using goto's to implement the subroutine linkage. The following macros - * will run code that appears at the end of readtoken1. - */ - -#define CHECKEND() {goto checkend; checkend_return:;} -#define PARSEREDIR() {goto parseredir; parseredir_return:;} -#define PARSESUB() {goto parsesub; parsesub_return:;} -#define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;} -#define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;} -#define PARSEARITH() {goto parsearith; parsearith_return:;} - -STATIC int -readtoken1(int firstc, char const *syntax, char *eofmark, int striptabs) -{ - int c = firstc; - char *out; - size_t len; - struct nodelist *bqlist; - int quotef; - int oldstyle; - /* syntax stack */ - struct synstack synbase = { .syntax = syntax }; - struct synstack *synstack = &synbase; - - if (syntax == DQSYNTAX) - synstack->dblquote = 1; - quotef = 0; - bqlist = NULL; - - STARTSTACKSTR(out); - loop: { /* for each line, until end of word */ -#if ATTY - if (c == '\034' && doprompt - && attyset() && ! equal(termval(), "emacs")) { - attyline(); - if (synstack->syntax == BASESYNTAX) - return readtoken(); - c = pgetc_top(synstack); - goto loop; - } -#endif - CHECKEND(); /* set c to PEOF if at end of here document */ - for (;;) { /* until end of line or end of word */ - CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */ - switch(synstack->syntax[c]) { - case CNL: /* '\n' */ - if (synstack->syntax == BASESYNTAX && - !synstack->varnest) - goto endword; /* exit outer loop */ - USTPUTC(c, out); - nlprompt(); - c = pgetc_top(synstack); - goto loop; /* continue outer loop */ - case CWORD: - USTPUTC(c, out); - break; - case CCTL: - if ((!eofmark) | synstack->dblquote | - synstack->varnest) - USTPUTC(CTLESC, out); - USTPUTC(c, out); - break; - /* backslash */ - case CBACK: - c = pgetc2(); - if (c == PEOF) { - USTPUTC(CTLESC, out); - USTPUTC('\\', out); - pungetc(); - } else { - if ( - synstack->dblquote && - c != '\\' && c != '`' && - c != '$' && ( - c != '"' || - (eofmark != NULL && - !synstack->varnest) - ) && ( - c != '}' || - !synstack->varnest - ) - ) { - USTPUTC(CTLESC, out); - USTPUTC('\\', out); - } - USTPUTC(CTLESC, out); - USTPUTC(c, out); - quotef++; - } - break; - case CSQUOTE: - synstack->syntax = SQSYNTAX; -quotemark: - if (eofmark == NULL) { - USTPUTC(CTLQUOTEMARK, out); - } - break; - case CDQUOTE: - synstack->syntax = DQSYNTAX; - synstack->dblquote = 1; -toggledq: - if (synstack->varnest) - synstack->innerdq ^= 1; - goto quotemark; - case CENDQUOTE: - if (eofmark && !synstack->varnest) { - USTPUTC(c, out); - break; - } - - if (synstack->dqvarnest == 0) { - synstack->syntax = BASESYNTAX; - synstack->dblquote = 0; - } - - quotef++; - - if (c == '"') - goto toggledq; - - goto quotemark; - case CVAR: /* '$' */ - PARSESUB(); /* parse substitution */ - break; - case CENDVAR: /* '}' */ - if (!synstack->innerdq && - synstack->varnest > 0) { - if (!--synstack->varnest && - synstack->varpushed) - synstack_pop(&synstack); - else if (synstack->dqvarnest > 0) - synstack->dqvarnest--; - USTPUTC(CTLENDVAR, out); - } else { - USTPUTC(c, out); - } - break; - case CLP: /* '(' in arithmetic */ - synstack->parenlevel++; - USTPUTC(c, out); - break; - case CRP: /* ')' in arithmetic */ - if (synstack->parenlevel > 0) { - USTPUTC(c, out); - --synstack->parenlevel; - } else { - if (pgetc_eatbnl() == ')') { - USTPUTC(CTLENDARI, out); - synstack_pop(&synstack); - } else { - /* - * unbalanced parens - * (don't 2nd guess - no error) - */ - pungetc(); - USTPUTC(')', out); - } - } - break; - case CBQUOTE: /* '`' */ - if (checkkwd & CHKEOFMARK) { - USTPUTC('`', out); - break; - } - - PARSEBACKQOLD(); - break; - case CEOF: - goto endword; /* exit outer loop */ - case CIGN: - break; - default: - if (synstack->varnest == 0) - goto endword; /* exit outer loop */ - if (c != PEOA) { - USTPUTC(c, out); - } - } - c = pgetc_top(synstack); - } - } -endword: - if (synstack->syntax == ARISYNTAX) - synerror("Missing '))'"); - if (synstack->syntax != BASESYNTAX && eofmark == NULL) - synerror("Unterminated quoted string"); - if (synstack->varnest != 0) { - /* { */ - synerror("Missing '}'"); - } - USTPUTC('\0', out); - len = out - (char *)stackblock(); - out = stackblock(); - if (eofmark == NULL) { - if ((c == '>' || c == '<') - && quotef == 0 - && len <= 2 - && (*out == '\0' || is_digit(*out))) { - PARSEREDIR(); - return lasttoken = TREDIR; - } else { - pungetc(); - } - } - quoteflag = quotef; - backquotelist = bqlist; - grabstackblock(len); - wordtext = out; - return lasttoken = TWORD; -/* end of readtoken routine */ - - - -/* - * Check to see whether we are at the end of the here document. When this - * is called, c is set to the first character of the next input line. If - * we are at the end of the here document, this routine sets the c to PEOF. - */ - -checkend: { - if (realeofmark(eofmark)) { - int markloc; - char *p; - - if (c == PEOA) { - c = pgetc2(); - } - if (striptabs) { - while (c == '\t') { - c = pgetc2(); - } - } - - markloc = out - (char *)stackblock(); - for (p = eofmark; STPUTC(c, out), *p; p++) { - if (c != *p) - goto more_heredoc; - - c = pgetc2(); - } - - if (c == '\n' || c == PEOF) { - c = PEOF; - nlnoprompt(); - } else { - int len; - -more_heredoc: - p = (char *)stackblock() + markloc + 1; - len = out - p; - - if (len) { - len -= c < 0; - c = p[-1]; - - if (len) { - char *str; - - str = alloca(len + 1); - *(char *)mempcpy(str, p, len) = 0; - - pushstring(str, NULL); - } - } - } - - STADJUST((char *)stackblock() + markloc - out, out); - } - goto checkend_return; -} - - -/* - * Parse a redirection operator. The variable "out" points to a string - * specifying the fd to be redirected. The variable "c" contains the - * first character of the redirection operator. - */ - -parseredir: { - char fd = *out; - union node *np; - - np = (union node *)stalloc(sizeof (struct nfile)); - if (c == '>') { - np->nfile.fd = 1; - c = pgetc_eatbnl(); - if (c == '>') - np->type = NAPPEND; - else if (c == '|') - np->type = NCLOBBER; - else if (c == '&') - np->type = NTOFD; - else { - np->type = NTO; - pungetc(); - } - } else { /* c == '<' */ - np->nfile.fd = 0; - switch (c = pgetc_eatbnl()) { - case '<': - if (sizeof (struct nfile) != sizeof (struct nhere)) { - np = (union node *)stalloc(sizeof (struct nhere)); - np->nfile.fd = 0; - } - np->type = NHERE; - heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc)); - heredoc->here = np; - if ((c = pgetc_eatbnl()) == '-') { - heredoc->striptabs = 1; - } else { - heredoc->striptabs = 0; - pungetc(); - } - break; - - case '&': - np->type = NFROMFD; - break; - - case '>': - np->type = NFROMTO; - break; - - default: - np->type = NFROM; - pungetc(); - break; - } - } - if (fd != '\0') - np->nfile.fd = digit_val(fd); - redirnode = np; - goto parseredir_return; -} - - -/* - * Parse a substitution. At this point, we have read the dollar sign - * and nothing else. - */ - -parsesub: { - int subtype; - int typeloc; - char *p; - static const char types[] = "}-+?="; - - c = pgetc_eatbnl(); - if ( - (checkkwd & CHKEOFMARK) || - c <= PEOA || - (c != '(' && c != '{' && !is_name(c) && !is_special(c)) - ) { - USTPUTC('$', out); - pungetc(); - } else if (c == '(') { /* $(command) or $((arith)) */ - if (pgetc_eatbnl() == '(') { - PARSEARITH(); - } else { - pungetc(); - PARSEBACKQNEW(); - } - } else { - const char *newsyn = synstack->syntax; - - USTPUTC(CTLVAR, out); - typeloc = out - (char *)stackblock(); - STADJUST(1, out); - subtype = VSNORMAL; - if (likely(c == '{')) { - c = pgetc_eatbnl(); - subtype = 0; - } -varname: - if (is_name(c)) { - do { - STPUTC(c, out); - c = pgetc_eatbnl(); - } while (is_in_name(c)); - } else if (is_digit(c)) { - do { - STPUTC(c, out); - c = pgetc_eatbnl(); - } while (!subtype && is_digit(c)); - } else if (c != '}') { - int cc = c; - - c = pgetc_eatbnl(); - - if (!subtype && cc == '#') { - subtype = VSLENGTH; - - if (c == '_' || isalnum(c)) - goto varname; - - cc = c; - c = pgetc_eatbnl(); - if (cc == '}' || c != '}') { - pungetc(); - subtype = 0; - c = cc; - cc = '#'; - } - } - - if (!is_special(cc)) { - if (subtype == VSLENGTH) - subtype = 0; - goto badsub; - } - - USTPUTC(cc, out); - } else - goto badsub; - - if (subtype == 0) { - int cc = c; - - switch (c) { - case ':': - subtype = VSNUL; - c = pgetc_eatbnl(); - /*FALLTHROUGH*/ - default: - p = strchr(types, c); - if (p == NULL) - break; - subtype |= p - types + VSNORMAL; - break; - case '%': - case '#': - subtype = c == '#' ? VSTRIMLEFT : - VSTRIMRIGHT; - c = pgetc_eatbnl(); - if (c == cc) - subtype++; - else - pungetc(); - - newsyn = BASESYNTAX; - break; - } - } else { -badsub: - pungetc(); - } - - if (newsyn == ARISYNTAX) - newsyn = DQSYNTAX; - - if ((newsyn != synstack->syntax || synstack->innerdq) && - subtype != VSNORMAL) { - synstack_push(&synstack, - synstack->prev ?: - alloca(sizeof(*synstack)), - newsyn); - - synstack->varpushed++; - synstack->dblquote = newsyn != BASESYNTAX; - } - - *((char *)stackblock() + typeloc) = subtype; - if (subtype != VSNORMAL) { - synstack->varnest++; - if (synstack->dblquote) - synstack->dqvarnest++; - } - STPUTC('=', out); - } - goto parsesub_return; -} - - -/* - * Called to parse command substitutions. Newstyle is set if the command - * is enclosed inside $(...); nlpp is a pointer to the head of the linked - * list of commands (passed by reference), and savelen is the number of - * characters on the top of the stack which must be preserved. - */ - -parsebackq: { - struct nodelist **nlpp; - union node *n; - char *str; - size_t savelen; - struct heredoc *saveheredoclist; - int uninitialized_var(saveprompt); - - str = NULL; - savelen = out - (char *)stackblock(); - if (savelen > 0) { - str = alloca(savelen); - memcpy(str, stackblock(), savelen); - } - if (oldstyle) { - /* We must read until the closing backquote, giving special - treatment to some slashes, and then push the string and - reread it as input, interpreting it normally. */ - char *pout; - int pc; - size_t psavelen; - char *pstr; - - - STARTSTACKSTR(pout); - for (;;) { - if (needprompt) { - setprompt(2); - } - switch (pc = pgetc_eatbnl()) { - case '`': - goto done; - - case '\\': - pc = pgetc(); - if (pc != '\\' && pc != '`' && pc != '$' - && (!synstack->dblquote || pc != '"')) - STPUTC('\\', pout); - if (pc > PEOA) { - break; - } - /* fall through */ - - case PEOF: - case PEOA: - synerror("EOF in backquote substitution"); - - case '\n': - nlnoprompt(); - break; - - default: - break; - } - STPUTC(pc, pout); - } -done: - STPUTC('\0', pout); - psavelen = pout - (char *)stackblock(); - if (psavelen > 0) { - pstr = grabstackstr(pout); - setinputstring(pstr); - } - } - nlpp = &bqlist; - while (*nlpp) - nlpp = &(*nlpp)->next; - *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist)); - (*nlpp)->next = NULL; - - saveheredoclist = heredoclist; - heredoclist = NULL; - - if (oldstyle) { - saveprompt = doprompt; - doprompt = 0; - } - - n = list(2); - - if (oldstyle) - doprompt = saveprompt; - else { - if (readtoken() != TRP) - synexpect(TRP); - setinputstring(nullstr); - } - - parseheredoc(); - heredoclist = saveheredoclist; - - (*nlpp)->n = n; - /* Start reading from old file again. */ - popfile(); - /* Ignore any pushed back tokens left from the backquote parsing. */ - if (oldstyle) - tokpushback = 0; - out = growstackto(savelen + 1); - if (str) { - memcpy(out, str, savelen); - STADJUST(savelen, out); - } - USTPUTC(CTLBACKQ, out); - if (oldstyle) - goto parsebackq_oldreturn; - else - goto parsebackq_newreturn; -} - -/* - * Parse an arithmetic expansion (indicate start of one and set state) - */ -parsearith: { - - synstack_push(&synstack, - synstack->prev ?: alloca(sizeof(*synstack)), - ARISYNTAX); - synstack->dblquote = 1; - USTPUTC(CTLARI, out); - goto parsearith_return; -} - -} /* end of readtoken */ - - - -#ifdef mkinit -INCLUDE "parser.h" -#endif - - -/* - * Return of a legal variable name (a letter or underscore followed by zero or - * more letters, underscores, and digits). - */ - -char * -endofname(const char *name) - { - char *p; - - p = (char *) name; - if (! is_name(*p)) - return p; - while (*++p) { - if (! is_in_name(*p)) - break; - } - return p; -} - - -/* - * Called when an unexpected token is read during the parse. The argument - * is the token that is expected, or -1 if more than one type of token can - * occur at this point. - */ - -STATIC void -synexpect(int token) -{ - char msg[64]; - - if (token >= 0) { - fmtstr(msg, 64, "%s unexpected (expecting %s)", - tokname[lasttoken], tokname[token]); - } else { - fmtstr(msg, 64, "%s unexpected", tokname[lasttoken]); - } - synerror(msg); - /* NOTREACHED */ -} - - -STATIC void -synerror(const char *msg) -{ - errlinno = plinno; - sh_error("Syntax error: %s", msg); - /* NOTREACHED */ -} - -const char * -expandstr(const char *ps) -{ - struct parsefile *file_stop; - struct jmploc *volatile savehandler; - struct heredoc *saveheredoclist; - const char *result; - int saveprompt; - struct jmploc jmploc; - union node n; - int err; - - file_stop = parsefile; - - /* XXX Fix (char *) cast. */ - setinputstring((char *)ps); - - saveheredoclist = heredoclist; - heredoclist = NULL; - saveprompt = doprompt; - doprompt = 0; - result = ps; - savehandler = handler; - if (unlikely(err = setjmp(jmploc.loc))) - goto out; - handler = &jmploc; - - readtoken1(pgetc_eatbnl(), DQSYNTAX, FAKEEOFMARK, 0); - - n.narg.type = NARG; - n.narg.next = NULL; - n.narg.text = wordtext; - n.narg.backquote = backquotelist; - - expandarg(&n, NULL, EXP_QUOTED); - result = stackblock(); - -out: - handler = savehandler; - if (err && exception != EXERROR) - longjmp(handler->loc, 1); - - doprompt = saveprompt; - unwindfiles(file_stop); - heredoclist = saveheredoclist; - - return result; -} - -STATIC void -setprompt(int which) -{ - struct stackmark smark; - const char *prompt, *rprompt, *nl; - int show; - - needprompt = 0; - whichprompt = which; - - switch (whichprompt) { - default: -#ifdef DEBUG - prompt = "<internal prompt error>"; - rprompt = prompt; - break; -#endif - case 0: - prompt = nullstr; - rprompt = nullstr; - break; - case 1: - prompt = ps1val(); - rprompt = rps1val(); - break; - case 2: - prompt = ps2val(); - rprompt = rps2val(); - break; - } - -#ifdef SMALL - show = 1; -#else - show = !el; -#endif - pushstackmark(&smark, stackblocksize()); - if (show) { - out2str(expandstr(prompt)); - } else { - free(promptcache); - free(rpromptcache); - promptcache = savestr(expandstr(prompt)); - rpromptcache = savestr(expandstr(rprompt)); - - nl = strrchr(promptcache, '\n'); - if (nl) - outmem(promptcache, &nl[1] - promptcache, out2); - } - popstackmark(&smark); -} - -/* - * called by editline -- return the cached prompt expansion. - */ -const char * -getprompt(void *unused) -{ - const char *nl; - - nl = strrchr(promptcache, '\n'); - - if (nl) - return &nl[1]; - else - return promptcache; -} - -const char * -getrprompt(void *unused) -{ - return rpromptcache; -} - -const char *const * -findkwd(const char *s) -{ - return findstring( - s, parsekwd, sizeof(parsekwd) / sizeof(const char *) - ); -} diff --git a/bin/dash/src/parser.h b/bin/dash/src/parser.h deleted file mode 100644 index 6597faa8..00000000 --- a/bin/dash/src/parser.h +++ /dev/null @@ -1,103 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)parser.h 8.3 (Berkeley) 5/4/95 - */ - -#include "token.h" - -/* control characters in argument strings */ -#define CTL_FIRST -127 /* first 'special' character */ -#define CTLESC -127 /* escape next character */ -#define CTLVAR -126 /* variable defn */ -#define CTLENDVAR -125 -#define CTLBACKQ -124 -#define CTLARI -122 /* arithmetic expression */ -#define CTLENDARI -121 -#define CTLQUOTEMARK -120 -#define CTL_LAST -120 /* last 'special' character */ - -/* variable substitution byte (follows CTLVAR) */ -#define VSTYPE 0x0f /* type of variable substitution */ -#define VSNUL 0x10 /* colon--treat the empty string as unset */ - -/* values of VSTYPE field */ -#define VSNORMAL 0x1 /* normal variable: $var or ${var} */ -#define VSMINUS 0x2 /* ${var-text} */ -#define VSPLUS 0x3 /* ${var+text} */ -#define VSQUESTION 0x4 /* ${var?message} */ -#define VSASSIGN 0x5 /* ${var=text} */ -#define VSTRIMRIGHT 0x6 /* ${var%pattern} */ -#define VSTRIMRIGHTMAX 0x7 /* ${var%%pattern} */ -#define VSTRIMLEFT 0x8 /* ${var#pattern} */ -#define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */ -#define VSLENGTH 0xa /* ${#var} */ - -/* values of checkkwd variable */ -#define CHKALIAS 0x1 -#define CHKKWD 0x2 -#define CHKNL 0x4 -#define CHKEOFMARK 0x8 - - -/* - * NEOF is returned by parsecmd when it encounters an end of file. It - * must be distinct from NULL, so we use the address of a variable that - * happens to be handy. - */ -extern int lasttoken; -extern int tokpushback; -#define NEOF ((union node *)&tokpushback) -extern int whichprompt; /* 1 == PS1, 2 == PS2 */ -extern int checkkwd; - - -int isassignment(const char *p); -union node *parsecmd(int); -void fixredir(union node *, const char *, int); -const char *getprompt(void *); -const char *getrprompt(void *); -const char *const *findkwd(const char *); -char *endofname(const char *); -const char *expandstr(const char *); - -static inline int -goodname(const char *p) -{ - return !*endofname(p); -} - -static inline int parser_eof(void) -{ - return tokpushback && lasttoken == TEOF; -} diff --git a/bin/dash/src/redir.c b/bin/dash/src/redir.c deleted file mode 100644 index 895140c3..00000000 --- a/bin/dash/src/redir.c +++ /dev/null @@ -1,483 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/stat.h> -#include <sys/types.h> -#include <sys/param.h> /* PIPE_BUF */ -#include <signal.h> -#include <string.h> -#include <fcntl.h> -#include <unistd.h> -#include <stdlib.h> - -/* - * Code for dealing with input/output redirection. - */ - -#include "main.h" -#include "shell.h" -#include "nodes.h" -#include "jobs.h" -#include "options.h" -#include "expand.h" -#include "redir.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" - - -#define EMPTY -2 /* marks an unused slot in redirtab */ -#define CLOSED -1 /* fd opened for redir needs to be closed */ - -#ifndef PIPE_BUF -# define PIPESIZE 4096 /* amount of buffering in a pipe */ -#else -# define PIPESIZE PIPE_BUF -#endif - - -MKINIT -struct redirtab { - struct redirtab *next; - int renamed[10]; -}; - - -MKINIT struct redirtab *redirlist; - -/* Bit map of currently closed file descriptors. */ -static unsigned closed_redirs; - -STATIC int openredirect(union node *); -#ifdef notyet -STATIC void dupredirect(union node *, int, char[10]); -#else -STATIC void dupredirect(union node *, int); -#endif -STATIC int openhere(union node *); - - -static unsigned update_closed_redirs(int fd, int nfd) -{ - unsigned val = closed_redirs; - unsigned bit = 1 << fd; - - if (nfd >= 0) - closed_redirs &= ~bit; - else - closed_redirs |= bit; - - return val & bit; -} - - -/* - * Process a list of redirection commands. If the REDIR_PUSH flag is set, - * old file descriptors are stashed away so that the redirection can be - * undone by calling popredir. If the REDIR_BACKQ flag is set, then the - * standard output, and the standard error if it becomes a duplicate of - * stdout, is saved in memory. - */ - -void -redirect(union node *redir, int flags) -{ - union node *n; - struct redirtab *sv; - int i; - int fd; - int newfd; - int *p; -#if notyet - char memory[10]; /* file descriptors to write to memory */ - - for (i = 10 ; --i >= 0 ; ) - memory[i] = 0; - memory[1] = flags & REDIR_BACKQ; -#endif - if (!redir) - return; - sv = NULL; - INTOFF; - if (likely(flags & REDIR_PUSH)) - sv = redirlist; - n = redir; - do { - newfd = openredirect(n); - if (newfd < -1) - continue; - - fd = n->nfile.fd; - - if (sv) { - int closed; - - p = &sv->renamed[fd]; - i = *p; - - closed = update_closed_redirs(fd, newfd); - - if (likely(i == EMPTY)) { - i = CLOSED; - if (fd != newfd && !closed) { - i = savefd(fd, fd); - fd = -1; - } - } - - *p = i; - } - - if (fd == newfd) - continue; - -#ifdef notyet - dupredirect(n, newfd, memory); -#else - dupredirect(n, newfd); -#endif - } while ((n = n->nfile.next)); - INTON; -#ifdef notyet - if (memory[1]) - out1 = &memout; - if (memory[2]) - out2 = &memout; -#endif - if (flags & REDIR_SAVEFD2 && sv->renamed[2] >= 0) - preverrout.fd = sv->renamed[2]; -} - - -STATIC int -openredirect(union node *redir) -{ - struct stat64 sb; - char *fname; - int f; - - switch (redir->nfile.type) { - case NFROM: - fname = redir->nfile.expfname; - if ((f = open64(fname, O_RDONLY)) < 0) - goto eopen; - break; - case NFROMTO: - fname = redir->nfile.expfname; - if ((f = open64(fname, O_RDWR|O_CREAT, 0666)) < 0) - goto ecreate; - break; - case NTO: - /* Take care of noclobber mode. */ - if (Cflag) { - fname = redir->nfile.expfname; - if (stat64(fname, &sb) < 0) { - if ((f = open64(fname, O_WRONLY|O_CREAT|O_EXCL, 0666)) < 0) - goto ecreate; - } else if (!S_ISREG(sb.st_mode)) { - if ((f = open64(fname, O_WRONLY, 0666)) < 0) - goto ecreate; - if (!fstat64(f, &sb) && S_ISREG(sb.st_mode)) { - close(f); - errno = EEXIST; - goto ecreate; - } - } else { - errno = EEXIST; - goto ecreate; - } - break; - } - /* FALLTHROUGH */ - case NCLOBBER: - fname = redir->nfile.expfname; - if ((f = open64(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0) - goto ecreate; - break; - case NAPPEND: - fname = redir->nfile.expfname; - if ((f = open64(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0) - goto ecreate; - break; - case NTOFD: - case NFROMFD: - f = redir->ndup.dupfd; - if (f == redir->nfile.fd) - f = -2; - break; - default: -#ifdef DEBUG - abort(); -#endif - /* Fall through to eliminate warning. */ - case NHERE: - case NXHERE: - f = openhere(redir); - break; - } - - return f; -ecreate: - sh_error("cannot create %s: %s", fname, errmsg(errno, E_CREAT)); -eopen: - sh_error("cannot open %s: %s", fname, errmsg(errno, E_OPEN)); -} - - -STATIC void -#ifdef notyet -dupredirect(redir, f, memory) -#else -dupredirect(redir, f) -#endif - union node *redir; - int f; -#ifdef notyet - char memory[10]; -#endif - { - int fd = redir->nfile.fd; - int err = 0; - -#ifdef notyet - memory[fd] = 0; -#endif - if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) { - /* if not ">&-" */ - if (f >= 0) { -#ifdef notyet - if (memory[f]) - memory[fd] = 1; - else -#endif - if (dup2(f, fd) < 0) { - err = errno; - goto err; - } - return; - } - f = fd; - } else if (dup2(f, fd) < 0) - err = errno; - - close(f); - if (err < 0) - goto err; - - return; - -err: - sh_error("%d: %s", f, strerror(err)); -} - - -/* - * Handle here documents. Normally we fork off a process to write the - * data to a pipe. If the document is short, we can stuff the data in - * the pipe without forking. - */ - -STATIC int -openhere(union node *redir) -{ - char *p; - int pip[2]; - size_t len = 0; - - if (pipe(pip) < 0) - sh_error("Pipe call failed"); - - p = redir->nhere.doc->narg.text; - if (redir->type == NXHERE) { - expandarg(redir->nhere.doc, NULL, EXP_QUOTED); - p = stackblock(); - } - - len = strlen(p); - if (len <= PIPESIZE) { - xwrite(pip[1], p, len); - goto out; - } - - if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) { - close(pip[0]); - signal(SIGINT, SIG_IGN); - signal(SIGQUIT, SIG_IGN); - signal(SIGHUP, SIG_IGN); -#ifdef SIGTSTP - signal(SIGTSTP, SIG_IGN); -#endif - signal(SIGPIPE, SIG_DFL); - xwrite(pip[1], p, len); - _exit(0); - } -out: - close(pip[1]); - return pip[0]; -} - - - -/* - * Undo the effects of the last redirection. - */ - -void -popredir(int drop) -{ - struct redirtab *rp; - int i; - - INTOFF; - rp = redirlist; - for (i = 0 ; i < 10 ; i++) { - int closed; - - if (rp->renamed[i] == EMPTY) - continue; - - closed = drop ? 1 : update_closed_redirs(i, rp->renamed[i]); - - switch (rp->renamed[i]) { - case CLOSED: - if (!closed) - close(i); - break; - default: - if (!drop) - dup2(rp->renamed[i], i); - close(rp->renamed[i]); - break; - } - } - redirlist = rp->next; - ckfree(rp); - INTON; -} - -/* - * Undo all redirections. Called on error or interrupt. - */ - -#ifdef mkinit - -INCLUDE "redir.h" - -EXITRESET { - /* - * Discard all saved file descriptors. - */ - unwindredir(0); -} - -FORKRESET { - redirlist = NULL; -} - -#endif - - - -/* - * Move a file descriptor to > 10. Invokes sh_error on error unless - * the original file dscriptor is not open. - */ - -int -savefd(int from, int ofd) -{ - int newfd; - int err; - - newfd = fcntl(from, F_DUPFD, 10); - err = newfd < 0 ? errno : 0; - if (err != EBADF) { - close(ofd); - if (err) - sh_error("%d: %s", from, strerror(err)); - else - fcntl(newfd, F_SETFD, FD_CLOEXEC); - } - - return newfd; -} - - -int -redirectsafe(union node *redir, int flags) -{ - int err; - volatile int saveint; - struct jmploc *volatile savehandler = handler; - struct jmploc jmploc; - - SAVEINT(saveint); - if (!(err = setjmp(jmploc.loc) * 2)) { - handler = &jmploc; - redirect(redir, flags); - } - handler = savehandler; - if (err && exception != EXERROR) - longjmp(handler->loc, 1); - RESTOREINT(saveint); - return err; -} - - -void unwindredir(struct redirtab *stop) -{ - while (redirlist != stop) - popredir(0); -} - - -struct redirtab *pushredir(union node *redir) -{ - struct redirtab *sv; - struct redirtab *q; - int i; - - q = redirlist; - if (!redir) - goto out; - - sv = ckmalloc(sizeof (struct redirtab)); - sv->next = q; - redirlist = sv; - for (i = 0; i < 10; i++) - sv->renamed[i] = EMPTY; - -out: - return q; -} diff --git a/bin/dash/src/redir.h b/bin/dash/src/redir.h deleted file mode 100644 index 1cf27616..00000000 --- a/bin/dash/src/redir.h +++ /dev/null @@ -1,52 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)redir.h 8.2 (Berkeley) 5/4/95 - */ - -/* flags passed to redirect */ -#define REDIR_PUSH 01 /* save previous values of file descriptors */ -#ifdef notyet -#define REDIR_BACKQ 02 /* save the command output in memory */ -#endif -#define REDIR_SAVEFD2 03 /* set preverrout */ - -struct redirtab; -union node; -void redirect(union node *, int); -void popredir(int); -int savefd(int, int); -int redirectsafe(union node *, int); -void unwindredir(struct redirtab *stop); -struct redirtab *pushredir(union node *redir); - diff --git a/bin/dash/src/shell.h b/bin/dash/src/shell.h deleted file mode 100644 index 98edc8be..00000000 --- a/bin/dash/src/shell.h +++ /dev/null @@ -1,104 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)shell.h 8.2 (Berkeley) 5/4/95 - */ - -/* - * The follow should be set to reflect the type of system you have: - * JOBS -> 1 if you have Berkeley job control, 0 otherwise. - * SHORTNAMES -> 1 if your linker cannot handle long names. - * define BSD if you are running 4.2 BSD or later. - * define SYSV if you are running under System V. - * define DEBUG=1 to compile in debugging ('set -o debug' to turn on) - * define DEBUG=2 to compile in and turn on debugging. - * define DO_SHAREDVFORK to indicate that vfork(2) shares its address - * with its parent. - * - * When debugging is on, debugging info will be written to ./trace and - * a quit signal will generate a core dump. - */ - -#include <sys/param.h> - -#ifndef JOBS -#define JOBS 1 -#endif -#ifndef BSD -#define BSD 1 -#endif - -#ifndef DO_SHAREDVFORK -#if __NetBSD_Version__ >= 104000000 -#define DO_SHAREDVFORK -#endif -#endif - -typedef void *pointer; -#ifndef NULL -#define NULL (void *)0 -#endif -#define STATIC static -#define MKINIT /* empty */ - -extern char nullstr[1]; /* null string */ - - -#ifdef DEBUG -#define TRACE(param) trace param -#define TRACEV(param) tracev param -#else -#define TRACE(param) -#define TRACEV(param) -#endif - -#if defined(__GNUC__) && __GNUC__ < 3 -#define va_copy __va_copy -#endif - -#if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) -#define __builtin_expect(x, expected_value) (x) -#endif - -#define likely(x) __builtin_expect(!!(x),1) -#define unlikely(x) __builtin_expect(!!(x),0) - -/* - * Hack to calculate maximum length. - * (length * 8 - 1) * log10(2) + 1 + 1 + 12 - * The second 1 is for the minus sign and the 12 is a safety margin. - */ -static inline int max_int_length(int bytes) -{ - return (bytes * 8 - 1) * 0.30102999566398119521 + 14; -} diff --git a/bin/dash/src/show.c b/bin/dash/src/show.c deleted file mode 100644 index 4a049e93..00000000 --- a/bin/dash/src/show.c +++ /dev/null @@ -1,406 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <stdio.h> -#include <stdarg.h> - -#include "shell.h" -#include "parser.h" -#include "nodes.h" -#include "mystring.h" -#include "show.h" -#include "options.h" - - -#ifdef DEBUG -static void shtree(union node *, int, char *, FILE*); -static void shcmd(union node *, FILE *); -static void sharg(union node *, FILE *); -static void indent(int, char *, FILE *); -static void trstring(char *); - - -void -showtree(union node *n) -{ - trputs("showtree called\n"); - shtree(n, 1, NULL, stdout); -} - - -static void -shtree(union node *n, int ind, char *pfx, FILE *fp) -{ - struct nodelist *lp; - const char *s; - - if (n == NULL) - return; - - indent(ind, pfx, fp); - switch(n->type) { - case NSEMI: - s = "; "; - goto binop; - case NAND: - s = " && "; - goto binop; - case NOR: - s = " || "; -binop: - shtree(n->nbinary.ch1, ind, NULL, fp); - /* if (ind < 0) */ - fputs(s, fp); - shtree(n->nbinary.ch2, ind, NULL, fp); - break; - case NCMD: - shcmd(n, fp); - if (ind >= 0) - putc('\n', fp); - break; - case NPIPE: - for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { - shcmd(lp->n, fp); - if (lp->next) - fputs(" | ", fp); - } - if (n->npipe.backgnd) - fputs(" &", fp); - if (ind >= 0) - putc('\n', fp); - break; - default: - fprintf(fp, "<node type %d>", n->type); - if (ind >= 0) - putc('\n', fp); - break; - } -} - - - -static void -shcmd(union node *cmd, FILE *fp) -{ - union node *np; - int first; - const char *s; - int dftfd; - - first = 1; - for (np = cmd->ncmd.args ; np ; np = np->narg.next) { - if (! first) - putchar(' '); - sharg(np, fp); - first = 0; - } - for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) { - if (! first) - putchar(' '); - switch (np->nfile.type) { - case NTO: s = ">"; dftfd = 1; break; - case NCLOBBER: s = ">|"; dftfd = 1; break; - case NAPPEND: s = ">>"; dftfd = 1; break; - case NTOFD: s = ">&"; dftfd = 1; break; - case NFROM: s = "<"; dftfd = 0; break; - case NFROMFD: s = "<&"; dftfd = 0; break; - case NFROMTO: s = "<>"; dftfd = 0; break; - default: s = "*error*"; dftfd = 0; break; - } - if (np->nfile.fd != dftfd) - fprintf(fp, "%d", np->nfile.fd); - fputs(s, fp); - if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) { - fprintf(fp, "%d", np->ndup.dupfd); - } else { - sharg(np->nfile.fname, fp); - } - first = 0; - } -} - - - -static void -sharg(union node *arg, FILE *fp) -{ - char *p; - struct nodelist *bqlist; - int subtype; - - if (arg->type != NARG) { - printf("<node type %d>\n", arg->type); - abort(); - } - bqlist = arg->narg.backquote; - for (p = arg->narg.text ; *p ; p++) { - switch ((signed char)*p) { - case CTLESC: - putc(*++p, fp); - break; - case CTLVAR: - putc('$', fp); - putc('{', fp); - subtype = *++p; - if (subtype == VSLENGTH) - putc('#', fp); - - while (*p != '=') - putc(*p++, fp); - - if (subtype & VSNUL) - putc(':', fp); - - switch (subtype & VSTYPE) { - case VSNORMAL: - putc('}', fp); - break; - case VSMINUS: - putc('-', fp); - break; - case VSPLUS: - putc('+', fp); - break; - case VSQUESTION: - putc('?', fp); - break; - case VSASSIGN: - putc('=', fp); - break; - case VSTRIMLEFT: - putc('#', fp); - break; - case VSTRIMLEFTMAX: - putc('#', fp); - putc('#', fp); - break; - case VSTRIMRIGHT: - putc('%', fp); - break; - case VSTRIMRIGHTMAX: - putc('%', fp); - putc('%', fp); - break; - case VSLENGTH: - break; - default: - printf("<subtype %d>", subtype); - } - break; - case CTLENDVAR: - putc('}', fp); - break; - case CTLBACKQ: - putc('$', fp); - putc('(', fp); - shtree(bqlist->n, -1, NULL, fp); - putc(')', fp); - break; - default: - putc(*p, fp); - break; - } - } -} - - -static void -indent(int amount, char *pfx, FILE *fp) -{ - int i; - - for (i = 0 ; i < amount ; i++) { - if (pfx && i == amount - 1) - fputs(pfx, fp); - putc('\t', fp); - } -} - - - -/* - * Debugging stuff. - */ - - -FILE *tracefile; - - -void -trputc(int c) -{ - if (debug != 1) - return; - putc(c, tracefile); -} - -void -trace(const char *fmt, ...) -{ - va_list va; - - if (debug != 1) - return; - va_start(va, fmt); - (void) vfprintf(tracefile, fmt, va); - va_end(va); -} - -void -tracev(const char *fmt, va_list va) -{ - if (debug != 1) - return; - (void) vfprintf(tracefile, fmt, va); -} - - -void -trputs(const char *s) -{ - if (debug != 1) - return; - fputs(s, tracefile); -} - - -static void -trstring(char *s) -{ - char *p; - char c; - - if (debug != 1) - return; - putc('"', tracefile); - for (p = s ; *p ; p++) { - switch ((signed char)*p) { - case '\n': c = 'n'; goto backslash; - case '\t': c = 't'; goto backslash; - case '\r': c = 'r'; goto backslash; - case '"': c = '"'; goto backslash; - case '\\': c = '\\'; goto backslash; - case CTLESC: c = 'e'; goto backslash; - case CTLVAR: c = 'v'; goto backslash; - case CTLBACKQ: c = 'q'; goto backslash; -backslash: putc('\\', tracefile); - putc(c, tracefile); - break; - default: - if (*p >= ' ' && *p <= '~') - putc(*p, tracefile); - else { - putc('\\', tracefile); - putc(*p >> 6 & 03, tracefile); - putc(*p >> 3 & 07, tracefile); - putc(*p & 07, tracefile); - } - break; - } - } - putc('"', tracefile); -} - - -void -trargs(char **ap) -{ - if (debug != 1) - return; - while (*ap) { - trstring(*ap++); - if (*ap) - putc(' ', tracefile); - else - putc('\n', tracefile); - } -} - - -void -opentrace(void) -{ - char s[100]; -#ifdef O_APPEND - int flags; -#endif - - if (debug != 1) { - if (tracefile) - fflush(tracefile); - /* leave open because libedit might be using it */ - return; - } -#ifdef not_this_way - { - char *p; - if ((p = getenv(homestr)) == NULL) { - if (geteuid() == 0) - p = "/"; - else - p = "/tmp"; - } - scopy(p, s); - strcat(s, "/trace"); - } -#else - scopy("./trace", s); -#endif /* not_this_way */ - if (tracefile) { -#ifndef __KLIBC__ - if (!freopen(s, "a", tracefile)) { -#else - if (!(!fclose(tracefile) && (tracefile = fopen(s, "a")))) { -#endif /* __KLIBC__ */ - fprintf(stderr, "Can't re-open %s\n", s); - debug = 0; - return; - } - } else { - if ((tracefile = fopen(s, "a")) == NULL) { - fprintf(stderr, "Can't open %s\n", s); - debug = 0; - return; - } - } -#ifdef O_APPEND - if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0) - fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND); -#endif -#ifndef __KLIBC__ - setlinebuf(tracefile); -#endif /* __KLIBC__ */ - fputs("\nTracing started.\n", tracefile); -} -#endif /* DEBUG */ diff --git a/bin/dash/src/show.h b/bin/dash/src/show.h deleted file mode 100644 index d0ccac79..00000000 --- a/bin/dash/src/show.h +++ /dev/null @@ -1,45 +0,0 @@ -/*- - * Copyright (c) 1995 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)show.h 1.1 (Berkeley) 5/4/95 - */ - -#include <stdarg.h> - -#ifdef DEBUG -union node; -void showtree(union node *); -void trace(const char *, ...); -void tracev(const char *, va_list); -void trargs(char **); -void trputc(int); -void trputs(const char *); -void opentrace(void); -#endif diff --git a/bin/dash/src/system.c b/bin/dash/src/system.c deleted file mode 100644 index 844a6410..00000000 --- a/bin/dash/src/system.c +++ /dev/null @@ -1,199 +0,0 @@ -/* - * Copyright (c) 2004 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef HAVE_ISALPHA -#define isalnum _isalnum -#define iscntrl _iscntrl -#define islower _islower -#define isspace _isspace -#define isalpha _isalpha -#define isdigit _isdigit -#define isprint _isprint -#define isupper _isupper -#define isblank _isblank -#define isgraph _isgraph -#define ispunct _ispunct -#define isxdigit _isxdigit -#include <ctype.h> -#undef isalnum -#undef iscntrl -#undef islower -#undef isspace -#undef isalpha -#undef isdigit -#undef isprint -#undef isupper -#undef isblank -#undef isgraph -#undef ispunct -#undef isxdigit -#endif - -#include <signal.h> -#include <string.h> - -#include "error.h" -#include "output.h" -#include "system.h" - -#ifndef HAVE_MEMPCPY -void *mempcpy(void *dest, const void *src, size_t n) -{ - return memcpy(dest, src, n) + n; -} -#endif - -#ifndef HAVE_STPCPY -char *stpcpy(char *dest, const char *src) -{ - size_t len = strlen(src); - dest[len] = 0; - return mempcpy(dest, src, len); -} -#endif - -#ifndef HAVE_STRCHRNUL -char *strchrnul(const char *s, int c) -{ - char *p = strchr(s, c); - if (!p) - p = (char *)s + strlen(s); - return p; -} -#endif - -#ifndef HAVE_STRSIGNAL -char *strsignal(int sig) -{ - static char buf[19]; - - if ((unsigned)sig < NSIG && sys_siglist[sig]) - return (char *)sys_siglist[sig]; - fmtstr(buf, sizeof(buf), "Signal %d", sig); - return buf; -} -#endif - -#ifndef HAVE_BSEARCH -void *bsearch(const void *key, const void *base, size_t nmemb, - size_t size, int (*cmp)(const void *, const void *)) -{ - while (nmemb) { - size_t mididx = nmemb / 2; - const void *midobj = base + mididx * size; - int diff = cmp(key, midobj); - - if (diff == 0) - return (void *)midobj; - - if (diff > 0) { - base = midobj + size; - nmemb -= mididx + 1; - } else - nmemb = mididx; - } - - return 0; -} -#endif - -#ifndef HAVE_SYSCONF -long sysconf(int name) -{ - sh_error("no sysconf for: %d", name); -} -#endif - -#ifndef HAVE_ISALPHA -int isalnum(int c) { - return _isalnum(c); -} - - -int iscntrl(int c) { - return _iscntrl(c); -} - - -int islower(int c) { - return _islower(c); -} - - -int isspace(int c) { - return _isspace(c); -} - - -int isalpha(int c) { - return _isalpha(c); -} - - -int isdigit(int c) { - return _isdigit(c); -} - - -int isprint(int c) { - return _isprint(c); -} - - -int isupper(int c) { - return _isupper(c); -} - - -#if HAVE_DECL_ISBLANK -int isblank(int c) { - return _isblank(c); -} -#endif - - -int isgraph(int c) { - return _isgraph(c); -} - - -int ispunct(int c) { - return _ispunct(c); -} - - -int isxdigit(int c) { - return _isxdigit(c); -} -#endif - -#if !HAVE_DECL_ISBLANK -int isblank(int c) { - return c == ' ' || c == '\t'; -} -#endif diff --git a/bin/dash/src/system.h b/bin/dash/src/system.h deleted file mode 100644 index 007952c5..00000000 --- a/bin/dash/src/system.h +++ /dev/null @@ -1,118 +0,0 @@ -/* - * Copyright (c) 2004 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <limits.h> -#include <signal.h> -#include <sys/types.h> - -#ifndef SSIZE_MAX -#define SSIZE_MAX ((ssize_t)((size_t)-1 >> 1)) -#endif - -static inline void sigclearmask(void) -{ -#if defined(HAVE_SIGSETMASK) && \ - (!defined(__GLIBC__) || \ - (defined(__GNUC__) && (__GNUC__ * 1000 + __GNUC_MINOR__) >= 4006)) -#ifdef __GLIBC__ -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wdeprecated-declarations" -#endif - sigsetmask(0); -#ifdef __GLIBC__ -#pragma GCC diagnostic pop -#endif -#else - sigset_t set; - sigemptyset(&set); - sigprocmask(SIG_SETMASK, &set, 0); -#endif -} - -#ifndef HAVE_MEMPCPY -void *mempcpy(void *, const void *, size_t); -#endif - -#ifndef HAVE_STPCPY -char *stpcpy(char *, const char *); -#endif - -#ifndef HAVE_STRCHRNUL -char *strchrnul(const char *, int); -#endif - -#ifndef HAVE_STRSIGNAL -char *strsignal(int); -#endif - -#ifndef HAVE_STRTOD -static inline double strtod(const char *nptr, char **endptr) -{ - *endptr = (char *)nptr; - return 0; -} -#endif - -#ifndef HAVE_STRTOIMAX -#define strtoimax strtoll -#endif - -#ifndef HAVE_STRTOUMAX -#define strtoumax strtoull -#endif - -#ifndef HAVE_BSEARCH -void *bsearch(const void *, const void *, size_t, size_t, - int (*)(const void *, const void *)); -#endif - -#ifndef HAVE_KILLPG -static inline int killpg(pid_t pid, int signal) -{ -#ifdef DEBUG - if (pid < 0) - abort(); -#endif - return kill(-pid, signal); -} -#endif - -#ifndef HAVE_SYSCONF -#define _SC_CLK_TCK 2 -long sysconf(int) __attribute__((__noreturn__)); -#endif - -#if !HAVE_DECL_ISBLANK -int isblank(int c); -#endif - -/* - * A trick to suppress uninitialized variable warning without generating any - * code - */ -#define uninitialized_var(x) x = x diff --git a/bin/dash/src/trap.c b/bin/dash/src/trap.c deleted file mode 100644 index cd84814f..00000000 --- a/bin/dash/src/trap.c +++ /dev/null @@ -1,446 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <signal.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> - -#include "shell.h" -#include "main.h" -#include "nodes.h" /* for other headers */ -#include "eval.h" -#include "init.h" -#include "jobs.h" -#include "show.h" -#include "options.h" -#include "syntax.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "trap.h" -#include "mystring.h" - -/* - * Sigmode records the current value of the signal handlers for the various - * modes. A value of zero means that the current handler is not known. - * S_HARD_IGN indicates that the signal was ignored on entry to the shell, - */ - -#define S_DFL 1 /* default signal handling (SIG_DFL) */ -#define S_CATCH 2 /* signal is caught */ -#define S_IGN 3 /* signal is ignored (SIG_IGN) */ -#define S_HARD_IGN 4 /* signal is ignored permenantly */ -#define S_RESET 5 /* temporary - to reset a hard ignored sig */ - - -/* trap handler commands */ -MKINIT char *trap[NSIG]; -/* number of non-null traps */ -int trapcnt; -/* current value of signal */ -char sigmode[NSIG - 1]; -/* indicates specified signal received */ -static char gotsig[NSIG - 1]; -/* last pending signal */ -volatile sig_atomic_t pending_sig; -/* received SIGCHLD */ -volatile sig_atomic_t gotsigchld; - -extern char *signal_names[]; - -static int decode_signum(const char *); - -#ifdef mkinit -INCLUDE "memalloc.h" -INCLUDE "trap.h" - -INIT { - sigmode[SIGCHLD - 1] = S_DFL; - setsignal(SIGCHLD); -} - -FORKRESET { - char **tp; - - INTOFF; - for (tp = trap ; tp < &trap[NSIG] ; tp++) { - if (*tp && **tp) { /* trap not NULL or SIG_IGN */ - ckfree(*tp); - *tp = NULL; - if (tp != &trap[0]) - setsignal(tp - trap); - } - } - trapcnt = 0; - INTON; -} -#endif - -/* - * The trap builtin. - */ - -int -trapcmd(int argc, char **argv) -{ - char *action; - char **ap; - int signo; - - nextopt(nullstr); - ap = argptr; - if (!*ap) { - for (signo = 0 ; signo < NSIG ; signo++) { - if (trap[signo] != NULL) { - out1fmt( - "trap -- %s %s\n", - single_quote(trap[signo]), - signal_names[signo] - ); - } - } - return 0; - } - if (!ap[1] || decode_signum(*ap) >= 0) - action = NULL; - else - action = *ap++; - while (*ap) { - if ((signo = decode_signal(*ap, 0)) < 0) { - outfmt(out2, "trap: %s: bad trap\n", *ap); - return 1; - } - INTOFF; - if (action) { - if (action[0] == '-' && action[1] == '\0') - action = NULL; - else { - if (*action) - trapcnt++; - action = savestr(action); - } - } - if (trap[signo]) { - if (*trap[signo]) - trapcnt--; - ckfree(trap[signo]); - } - trap[signo] = action; - if (signo != 0) - setsignal(signo); - INTON; - ap++; - } - return 0; -} - - - -/* - * Set the signal handler for the specified signal. The routine figures - * out what it should be set to. - */ - -void -setsignal(int signo) -{ - int action; - int lvforked; - char *t, tsig; - struct sigaction act; - - lvforked = vforked; - - if ((t = trap[signo]) == NULL) - action = S_DFL; - else if (*t != '\0') - action = S_CATCH; - else - action = S_IGN; - if (rootshell && action == S_DFL && !lvforked) { - switch (signo) { - case SIGINT: - if (iflag || minusc || sflag == 0) - action = S_CATCH; - break; - case SIGQUIT: -#ifdef DEBUG - if (debug) - break; -#endif - /* FALLTHROUGH */ - case SIGTERM: - if (iflag) - action = S_IGN; - break; -#if JOBS - case SIGTSTP: - case SIGTTOU: - if (mflag) - action = S_IGN; - break; -#endif - } - } - - if (signo == SIGCHLD) - action = S_CATCH; - - t = &sigmode[signo - 1]; - tsig = *t; - if (tsig == 0) { - /* - * current setting unknown - */ - if (sigaction(signo, 0, &act) == -1) { - /* - * Pretend it worked; maybe we should give a warning - * here, but other shells don't. We don't alter - * sigmode, so that we retry every time. - */ - return; - } - if (act.sa_handler == SIG_IGN) { - if (mflag && (signo == SIGTSTP || - signo == SIGTTIN || signo == SIGTTOU)) { - tsig = S_IGN; /* don't hard ignore these */ - } else - tsig = S_HARD_IGN; - } else { - tsig = S_RESET; /* force to be set */ - } - } - if (tsig == S_HARD_IGN || tsig == action) - return; - switch (action) { - case S_CATCH: - act.sa_handler = onsig; - break; - case S_IGN: - act.sa_handler = SIG_IGN; - break; - default: - act.sa_handler = SIG_DFL; - } - if (!lvforked) - *t = action; - act.sa_flags = 0; - sigfillset(&act.sa_mask); - sigaction(signo, &act, 0); -} - -/* - * Ignore a signal. - */ - -void -ignoresig(int signo) -{ - if (sigmode[signo - 1] != S_IGN && sigmode[signo - 1] != S_HARD_IGN) { - signal(signo, SIG_IGN); - } - if (!vforked) - sigmode[signo - 1] = S_HARD_IGN; -} - - - -/* - * Signal handler. - */ - -void -onsig(int signo) -{ - if (vforked) - return; - - if (signo == SIGCHLD) { - gotsigchld = 1; - if (!trap[SIGCHLD]) - return; - } - - gotsig[signo - 1] = 1; - pending_sig = signo; - - if (signo == SIGINT && !trap[SIGINT]) { - if (!suppressint) - onint(); - intpending = 1; - } -} - - - -/* - * Called to execute a trap. Perhaps we should avoid entering new trap - * handlers while we are executing a trap handler. - */ - -void dotrap(void) -{ - char *p; - char *q; - int i; - int status, last_status; - - if (!pending_sig) - return; - - status = savestatus; - last_status = status; - if (likely(status < 0)) { - status = exitstatus; - savestatus = status; - } - pending_sig = 0; - barrier(); - - for (i = 0, q = gotsig; i < NSIG - 1; i++, q++) { - if (!*q) - continue; - - if (evalskip) { - pending_sig = i + 1; - break; - } - - *q = 0; - - p = trap[i + 1]; - if (!p) - continue; - evalstring(p, 0); - if (evalskip != SKIPFUNC) - exitstatus = status; - } - - savestatus = last_status; -} - - - -/* - * Controls whether the shell is interactive or not. - */ - - -void -setinteractive(int on) -{ - static int is_interactive; - - if (++on == is_interactive) - return; - is_interactive = on; - setsignal(SIGINT); - setsignal(SIGQUIT); - setsignal(SIGTERM); -} - - - -/* - * Called to exit the shell. - */ - -void -exitshell(void) -{ - struct jmploc loc; - char *p; - - savestatus = exitstatus; - TRACE(("pid %d, exitshell(%d)\n", getpid(), savestatus)); - if (setjmp(loc.loc)) - goto out; - handler = &loc; - if ((p = trap[0])) { - trap[0] = NULL; - evalskip = 0; - evalstring(p, 0); - evalskip = SKIPFUNCDEF; - } -out: - exitreset(); - /* - * Disable job control so that whoever had the foreground before we - * started can get it back. - */ - if (likely(!setjmp(loc.loc))) - setjobctl(0); - flushall(); - _exit(exitstatus); - /* NOTREACHED */ -} - -static int decode_signum(const char *string) -{ - int signo = -1; - - if (is_number(string)) { - signo = atoi(string); - if (signo >= NSIG) - signo = -1; - } - - return signo; -} - -int decode_signal(const char *string, int minsig) -{ - int signo; - - signo = decode_signum(string); - if (signo >= 0) - return signo; - - for (signo = minsig; signo < NSIG; signo++) { - if (!strcasecmp(string, signal_names[signo])) { - return signo; - } - } - - return -1; -} - -void sigblockall(sigset_t *oldmask) -{ - sigset_t mask; - - sigfillset(&mask); - sigprocmask(SIG_SETMASK, &mask, oldmask); -} diff --git a/bin/dash/src/trap.h b/bin/dash/src/trap.h deleted file mode 100644 index beaf6605..00000000 --- a/bin/dash/src/trap.h +++ /dev/null @@ -1,57 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)trap.h 8.3 (Berkeley) 6/5/95 - */ - -#include <signal.h> - -extern int trapcnt; -extern char sigmode[]; -extern volatile sig_atomic_t pending_sig; -extern volatile sig_atomic_t gotsigchld; - -int trapcmd(int, char **); -void setsignal(int); -void ignoresig(int); -void onsig(int); -void dotrap(void); -void setinteractive(int); -void exitshell(void) __attribute__((__noreturn__)); -int decode_signal(const char *, int); -void sigblockall(sigset_t *oldmask); - -static inline int have_traps(void) -{ - return trapcnt; -} diff --git a/bin/dash/src/var.c b/bin/dash/src/var.c deleted file mode 100644 index ca9504ef..00000000 --- a/bin/dash/src/var.c +++ /dev/null @@ -1,676 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#ifdef HAVE_PATHS_H -#include <paths.h> -#endif - -/* - * Shell variables. - */ - -#include "shell.h" -#include "output.h" -#include "expand.h" -#include "nodes.h" /* for other headers */ -#include "exec.h" -#include "syntax.h" -#include "options.h" -#include "mail.h" -#include "var.h" -#include "memalloc.h" -#include "error.h" -#include "mystring.h" -#include "parser.h" -#include "show.h" -#ifndef SMALL -#include "myhistedit.h" -#endif -#include "system.h" - - -#define VTABSIZE 39 - - -struct localvar_list { - struct localvar_list *next; - struct localvar *lv; -}; - -MKINIT struct localvar_list *localvar_stack; - -const char defpathvar[] = - "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"; -char defifsvar[] = "IFS= \t\n"; -MKINIT char defoptindvar[] = "OPTIND=1"; - -int lineno; -char linenovar[sizeof("LINENO=")+sizeof(int)*CHAR_BIT/3+1] = "LINENO="; - -/* Some macros in var.h depend on the order, add new variables to the end. */ -struct var varinit[] = { -#if ATTY - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "ATTY\0", 0 }, -#endif - { 0, VSTRFIXED|VTEXTFIXED, defifsvar, 0 }, - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL\0", changemail }, - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH\0", changemail }, - { 0, VSTRFIXED|VTEXTFIXED, defpathvar, changepath }, - { 0, VSTRFIXED|VTEXTFIXED, "PS1=$ ", 0 }, - { 0, VSTRFIXED|VTEXTFIXED, "PS2=> ", 0 }, - { 0, VSTRFIXED|VTEXTFIXED, "PS4=+ ", 0 }, - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "RPS1\0", 0 }, - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "RPS2\0", 0 }, - { 0, VSTRFIXED|VTEXTFIXED, defoptindvar, getoptsreset }, -#ifdef WITH_LINENO - { 0, VSTRFIXED|VTEXTFIXED, linenovar, 0 }, -#endif -#ifndef SMALL - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "TERM\0", 0 }, - { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "HISTSIZE\0", sethistsize }, -#endif -}; - -STATIC struct var *vartab[VTABSIZE]; - -STATIC struct var **hashvar(const char *); -STATIC int vpcmp(const void *, const void *); -STATIC struct var **findvar(struct var **, const char *); - -/* - * Initialize the varable symbol tables and import the environment - */ - -#ifdef mkinit -INCLUDE <unistd.h> -INCLUDE <sys/types.h> -INCLUDE <sys/stat.h> -INCLUDE "cd.h" -INCLUDE "output.h" -INCLUDE "var.h" -MKINIT char **environ; -INIT { - char **envp; - static char ppid[32] = "PPID="; - const char *p; - struct stat64 st1, st2; - - initvar(); - for (envp = environ ; *envp ; envp++) { - p = endofname(*envp); - if (p != *envp && *p == '=') { - setvareq(*envp, VEXPORT|VTEXTFIXED); - } - } - - setvareq(defifsvar, VTEXTFIXED); - setvareq(defoptindvar, VTEXTFIXED); - - fmtstr(ppid + 5, sizeof(ppid) - 5, "%ld", (long) getppid()); - setvareq(ppid, VTEXTFIXED); - - p = lookupvar("PWD"); - if (p) - if (*p != '/' || stat64(p, &st1) || stat64(".", &st2) || - st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) - p = 0; - setpwd(p, 0); -} - -RESET { - unwindlocalvars(0); -} -#endif - - -/* - * This routine initializes the builtin variables. It is called when the - * shell is initialized. - */ - -void -initvar(void) -{ - struct var *vp; - struct var *end; - struct var **vpp; - - vp = varinit; - end = vp + sizeof(varinit) / sizeof(varinit[0]); - do { - vpp = hashvar(vp->text); - vp->next = *vpp; - *vpp = vp; - } while (++vp < end); - /* - * PS1 depends on uid - */ - if (!geteuid()) - vps1.text = "PS1=# "; -} - -/* - * Set the value of a variable. The flags argument is ored with the - * flags of the variable. If val is NULL, the variable is unset. - */ - -struct var *setvar(const char *name, const char *val, int flags) -{ - char *p, *q; - size_t namelen; - char *nameeq; - size_t vallen; - struct var *vp; - - q = endofname(name); - p = strchrnul(q, '='); - namelen = p - name; - if (!namelen || p != q) - sh_error("%.*s: bad variable name", namelen, name); - vallen = 0; - if (val == NULL) { - flags |= VUNSET; - } else { - vallen = strlen(val); - } - INTOFF; - p = mempcpy(nameeq = ckmalloc(namelen + vallen + 2), name, namelen); - if (val) { - *p++ = '='; - p = mempcpy(p, val, vallen); - } - *p = '\0'; - vp = setvareq(nameeq, flags | VNOSAVE); - INTON; - - return vp; -} - -/* - * Set the given integer as the value of a variable. The flags argument is - * ored with the flags of the variable. - */ - -intmax_t setvarint(const char *name, intmax_t val, int flags) -{ - int len = max_int_length(sizeof(val)); - char buf[len]; - - fmtstr(buf, len, "%" PRIdMAX, val); - setvar(name, buf, flags); - return val; -} - - - -/* - * Same as setvar except that the variable and value are passed in - * the first argument as name=value. Since the first argument will - * be actually stored in the table, it should not be a string that - * will go away. - * Called with interrupts off. - */ - -struct var *setvareq(char *s, int flags) -{ - struct var *vp, **vpp; - - vpp = hashvar(s); - flags |= (VEXPORT & (((unsigned) (1 - aflag)) - 1)); - vpp = findvar(vpp, s); - vp = *vpp; - if (vp) { - if (vp->flags & VREADONLY) { - const char *n; - - if (flags & VNOSAVE) - free(s); - n = vp->text; - sh_error("%.*s: is read only", strchrnul(n, '=') - n, - n); - } - - if (flags & VNOSET) - goto out; - - if (vp->func && (flags & VNOFUNC) == 0) - (*vp->func)(strchrnul(s, '=') + 1); - - if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0) - ckfree(vp->text); - - if (((flags & (VEXPORT|VREADONLY|VSTRFIXED|VUNSET)) | - (vp->flags & VSTRFIXED)) == VUNSET) { - *vpp = vp->next; - ckfree(vp); -out_free: - if ((flags & (VTEXTFIXED|VSTACK|VNOSAVE)) == VNOSAVE) - ckfree(s); - goto out; - } - - flags |= vp->flags & ~(VTEXTFIXED|VSTACK|VNOSAVE|VUNSET); - } else { - if (flags & VNOSET) - goto out; - if ((flags & (VEXPORT|VREADONLY|VSTRFIXED|VUNSET)) == VUNSET) - goto out_free; - /* not found */ - vp = ckmalloc(sizeof (*vp)); - vp->next = *vpp; - vp->func = NULL; - *vpp = vp; - } - if (!(flags & (VTEXTFIXED|VSTACK|VNOSAVE))) - s = savestr(s); - vp->text = s; - vp->flags = flags; - -out: - return vp; -} - -/* - * Find the value of a variable. Returns NULL if not set. - */ - -char * -lookupvar(const char *name) -{ - struct var *v; - - if ((v = *findvar(hashvar(name), name)) && !(v->flags & VUNSET)) { -#ifdef WITH_LINENO - if (v == &vlineno && v->text == linenovar) { - fmtstr(linenovar+7, sizeof(linenovar)-7, "%d", lineno); - } -#endif - return strchrnul(v->text, '=') + 1; - } - return NULL; -} - -intmax_t lookupvarint(const char *name) -{ - return atomax(lookupvar(name) ?: nullstr, 0); -} - - - -/* - * Generate a list of variables satisfying the given conditions. - */ - -char ** -listvars(int on, int off, char ***end) -{ - struct var **vpp; - struct var *vp; - char **ep; - int mask; - - STARTSTACKSTR(ep); - vpp = vartab; - mask = on | off; - do { - for (vp = *vpp ; vp ; vp = vp->next) - if ((vp->flags & mask) == on) { - if (ep == stackstrend()) - ep = growstackstr(); - *ep++ = (char *) vp->text; - } - } while (++vpp < vartab + VTABSIZE); - if (ep == stackstrend()) - ep = growstackstr(); - if (end) - *end = ep; - *ep++ = NULL; - return grabstackstr(ep); -} - - - -/* - * POSIX requires that 'set' (but not export or readonly) output the - * variables in lexicographic order - by the locale's collating order (sigh). - * Maybe we could keep them in an ordered balanced binary tree - * instead of hashed lists. - * For now just roll 'em through qsort for printing... - */ - -int -showvars(const char *prefix, int on, int off) -{ - const char *sep; - char **ep, **epend; - - ep = listvars(on, off, &epend); - qsort(ep, epend - ep, sizeof(char *), vpcmp); - - sep = *prefix ? spcstr : prefix; - - for (; ep < epend; ep++) { - const char *p; - const char *q; - - p = strchrnul(*ep, '='); - q = nullstr; - if (*p) - q = single_quote(++p); - - out1fmt("%s%s%.*s%s\n", prefix, sep, (int)(p - *ep), *ep, q); - } - - return 0; -} - - - -/* - * The export and readonly commands. - */ - -int -exportcmd(int argc, char **argv) -{ - struct var *vp; - char *name; - const char *p; - char **aptr; - int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT; - int notp; - - notp = nextopt("p") - 'p'; - if (notp && ((name = *(aptr = argptr)))) { - do { - if ((p = strchr(name, '=')) != NULL) { - p++; - } else { - if ((vp = *findvar(hashvar(name), name))) { - vp->flags |= flag; - continue; - } - } - setvar(name, p, flag); - } while ((name = *++aptr) != NULL); - } else { - showvars(argv[0], flag, 0); - } - return 0; -} - - -/* - * The "local" command. - */ - -int -localcmd(int argc, char **argv) -{ - char *name; - - if (!localvar_stack) - sh_error("not in a function"); - - argv = argptr; - while ((name = *argv++) != NULL) { - mklocal(name, 0); - } - return 0; -} - - -/* - * Make a variable a local variable. When a variable is made local, it's - * value and flags are saved in a localvar structure. The saved values - * will be restored when the shell function returns. We handle the name - * "-" as a special case. - */ - -void mklocal(char *name, int flags) -{ - struct localvar *lvp; - struct var **vpp; - struct var *vp; - - INTOFF; - lvp = ckmalloc(sizeof (struct localvar)); - if (name[0] == '-' && name[1] == '\0') { - char *p; - p = ckmalloc(sizeof(optlist)); - lvp->text = memcpy(p, optlist, sizeof(optlist)); - vp = NULL; - } else { - char *eq; - - vpp = hashvar(name); - vp = *findvar(vpp, name); - eq = strchr(name, '='); - if (vp == NULL) { - if (eq) - vp = setvareq(name, VSTRFIXED | flags); - else - vp = setvar(name, NULL, VSTRFIXED | flags); - lvp->flags = VUNSET; - } else { - lvp->text = vp->text; - lvp->flags = vp->flags; - vp->flags |= VSTRFIXED|VTEXTFIXED; - if (eq) - setvareq(name, flags); - } - } - lvp->vp = vp; - lvp->next = localvar_stack->lv; - localvar_stack->lv = lvp; - INTON; -} - - -/* - * Called after a function returns. - * Interrupts must be off. - */ - -static void -poplocalvars(void) -{ - struct localvar_list *ll; - struct localvar *lvp, *next; - struct var *vp; - - INTOFF; - ll = localvar_stack; - localvar_stack = ll->next; - - next = ll->lv; - ckfree(ll); - - while ((lvp = next) != NULL) { - next = lvp->next; - vp = lvp->vp; - TRACE(("poplocalvar %s\n", vp ? vp->text : "-")); - if (vp == NULL) { /* $- saved */ - memcpy(optlist, lvp->text, sizeof(optlist)); - ckfree(lvp->text); - optschanged(); - } else if (lvp->flags == VUNSET) { - vp->flags &= ~(VSTRFIXED|VREADONLY); - unsetvar(vp->text); - } else { - if (vp->func) - (*vp->func)(strchrnul(lvp->text, '=') + 1); - if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0) - ckfree(vp->text); - vp->flags = lvp->flags; - vp->text = lvp->text; - } - ckfree(lvp); - } - INTON; -} - - -/* - * Create a new localvar environment. - */ -struct localvar_list *pushlocalvars(int push) -{ - struct localvar_list *ll; - struct localvar_list *top; - - top = localvar_stack; - if (!push) - goto out; - - INTOFF; - ll = ckmalloc(sizeof(*ll)); - ll->lv = NULL; - ll->next = top; - localvar_stack = ll; - INTON; - -out: - return top; -} - - -void unwindlocalvars(struct localvar_list *stop) -{ - while (localvar_stack != stop) - poplocalvars(); -} - - -/* - * The unset builtin command. We unset the function before we unset the - * variable to allow a function to be unset when there is a readonly variable - * with the same name. - */ - -int -unsetcmd(int argc, char **argv) -{ - char **ap; - int i; - int flag = 0; - - while ((i = nextopt("vf")) != '\0') { - flag = i; - } - - for (ap = argptr; *ap ; ap++) { - if (flag != 'f') { - unsetvar(*ap); - continue; - } - if (flag != 'v') - unsetfunc(*ap); - } - return 0; -} - - -/* - * Unset the specified variable. - */ - -void unsetvar(const char *s) -{ - setvar(s, 0, 0); -} - - - -/* - * Find the appropriate entry in the hash table from the name. - */ - -STATIC struct var ** -hashvar(const char *p) -{ - unsigned int hashval; - - hashval = ((unsigned char) *p) << 4; - while (*p && *p != '=') - hashval += (unsigned char) *p++; - return &vartab[hashval % VTABSIZE]; -} - - - -/* - * Compares two strings up to the first = or '\0'. The first - * string must be terminated by '='; the second may be terminated by - * either '=' or '\0'. - */ - -int -varcmp(const char *p, const char *q) -{ - int c, d; - - while ((c = *p) == (d = *q)) { - if (!c || c == '=') - goto out; - p++; - q++; - } - if (c == '=') - c = 0; - if (d == '=') - d = 0; -out: - return c - d; -} - -STATIC int -vpcmp(const void *a, const void *b) -{ - return varcmp(*(const char **)a, *(const char **)b); -} - -STATIC struct var ** -findvar(struct var **vpp, const char *name) -{ - for (; *vpp; vpp = &(*vpp)->next) { - if (varequal((*vpp)->text, name)) { - break; - } - } - return vpp; -} diff --git a/bin/dash/src/var.h b/bin/dash/src/var.h deleted file mode 100644 index 1d1d87a5..00000000 --- a/bin/dash/src/var.h +++ /dev/null @@ -1,173 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * Copyright (c) 1997-2005 - * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)var.h 8.2 (Berkeley) 5/4/95 - */ - -#include <inttypes.h> - -/* - * Shell variables. - */ - -/* flags */ -#define VEXPORT 0x01 /* variable is exported */ -#define VREADONLY 0x02 /* variable cannot be modified */ -#define VSTRFIXED 0x04 /* variable struct is statically allocated */ -#define VTEXTFIXED 0x08 /* text is statically allocated */ -#define VSTACK 0x10 /* text is allocated on the stack */ -#define VUNSET 0x20 /* the variable is not set */ -#define VNOFUNC 0x40 /* don't call the callback function */ -#define VNOSET 0x80 /* do not set variable - just readonly test */ -#define VNOSAVE 0x100 /* when text is on the heap before setvareq */ - - -struct var { - struct var *next; /* next entry in hash list */ - int flags; /* flags are defined above */ - const char *text; /* name=value */ - void (*func)(const char *); - /* function to be called when */ - /* the variable gets set/unset */ -}; - - -struct localvar { - struct localvar *next; /* next local variable in list */ - struct var *vp; /* the variable that was made local */ - int flags; /* saved flags */ - const char *text; /* saved text */ -}; - -struct localvar_list; - - -extern struct localvar *localvars; -extern struct var varinit[]; - -#if ATTY -#define vatty varinit[0] -#define vifs varinit[1] -#else -#define vifs varinit[0] -#endif -#define vmail (&vifs)[1] -#define vmpath (&vmail)[1] -#define vpath (&vmpath)[1] -#define vps1 (&vpath)[1] -#define vps2 (&vps1)[1] -#define vps4 (&vps2)[1] -#define vrps1 (&vps4)[1] -#define vrps2 (&vrps1)[1] -#define voptind (&vrps2)[1] -#ifdef WITH_LINENO -#define vlineno (&voptind)[1] -#endif -#ifndef SMALL -#ifdef WITH_LINENO -#define vterm (&vlineno)[1] -#else -#define vterm (&voptind)[1] -#endif -#define vhistsize (&vterm)[1] -#endif - -extern char defifsvar[]; -#define defifs (defifsvar + 4) -extern const char defpathvar[]; -#define defpath (defpathvar + 36) - -extern int lineno; -extern char linenovar[]; - -/* - * The following macros access the values of the above variables. - * They have to skip over the name. They return the null string - * for unset variables. - */ - -#define ifsval() (vifs.text + 4) -#define ifsset() ((vifs.flags & VUNSET) == 0) -#define mailval() (vmail.text + 5) -#define mpathval() (vmpath.text + 9) -#define pathval() (vpath.text + 5) -#define ps1val() (vps1.text + 4) -#define ps2val() (vps2.text + 4) -#define ps4val() (vps4.text + 4) -#define rps1val() (vrps1.text + 5) -#define rps2val() (vrps2.text + 5) -#define optindval() (voptind.text + 7) -#define linenoval() (vlineno.text + 7) -#ifndef SMALL -#define histsizeval() (vhistsize.text + 9) -#define termval() (vterm.text + 5) -#endif - -#if ATTY -#define attyset() ((vatty.flags & VUNSET) == 0) -#endif -#define mpathset() ((vmpath.flags & VUNSET) == 0) - -void initvar(void); -struct var *setvar(const char *name, const char *val, int flags); -intmax_t setvarint(const char *, intmax_t, int); -struct var *setvareq(char *s, int flags); -struct strlist; -char *lookupvar(const char *); -intmax_t lookupvarint(const char *); -char **listvars(int, int, char ***); -#define environment() listvars(VEXPORT, VUNSET, 0) -int showvars(const char *, int, int); -int exportcmd(int, char **); -int localcmd(int, char **); -void mklocal(char *name, int flags); -struct localvar_list *pushlocalvars(int push); -void unwindlocalvars(struct localvar_list *stop); -int unsetcmd(int, char **); -void unsetvar(const char *); -int varcmp(const char *, const char *); - -static inline int varequal(const char *a, const char *b) { - return !varcmp(a, b); -} - -/* - * Search the environment of a builtin command. - */ - -static inline char *bltinlookup(const char *name) -{ - return lookupvar(name); -} - - |