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Diffstat (limited to 'bin/dash/src/mkinit.c')
| -rw-r--r-- | bin/dash/src/mkinit.c | 493 |
1 files changed, 0 insertions, 493 deletions
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 */ -} |