Remove 1sh

1 files changed, 0 insertions, 784 deletions

diff --git a/bin/1sh/exec.c b/bin/1sh/exec.c
deleted file mode 100644
index 81efa565..00000000
--- a/bin/1sh/exec.c
+++ /dev/null
@@ -1,784 +0,0 @@
-/*-
- * Copyright (c) 1991, 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.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)exec.c	8.4 (Berkeley) 6/8/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-/* $FreeBSD: releng/12.1/bin/sh/exec.c 336320 2018-07-15 21:55:17Z jilles $ */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <paths.h>
-#include <stdlib.h>
-
-/*
- * 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 "input.h"
-#include "output.h"
-#include "syntax.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "show.h"
-#include "jobs.h"
-#include "alias.h"
-
-
-#define CMDTABLESIZE 31		/* should be prime */
-
-
-
-struct tblentry {
-	struct tblentry *next;	/* next entry in hash chain */
-	union param param;	/* definition of builtin function */
-	int special;		/* flag for special builtin commands */
-	signed char cmdtype;	/* index identifying command */
-	char cmdname[];		/* name of command */
-};
-
-
-static struct tblentry *cmdtable[CMDTABLESIZE];
-static int cmdtable_cd = 0;	/* cmdtable contains cd-dependent entries */
-int exerrno = 0;			/* Last exec error */
-
-
-static void tryexec(char *, char **, char **);
-static void printentry(struct tblentry *, int);
-static struct tblentry *cmdlookup(const char *, int);
-static void delete_cmd_entry(void);
-static void addcmdentry(const char *, struct cmdentry *);
-
-
-
-/*
- * Exec a program.  Never returns.  If you change this routine, you may
- * have to change the find_command routine as well.
- *
- * The argv array may be changed and element argv[-1] should be writable.
- */
-
-void
-shellexec(char **argv, char **envp, const char *path, int idx)
-{
-	char *cmdname;
-	const char *opt;
-	int e;
-
-	if (strchr(argv[0], '/') != NULL) {
-		tryexec(argv[0], argv, envp);
-		e = errno;
-	} else {
-		e = ENOENT;
-		while ((cmdname = padvance(&path, &opt, argv[0])) != NULL) {
-			if (--idx < 0 && opt == NULL) {
-				tryexec(cmdname, argv, envp);
-				if (errno != ENOENT && errno != ENOTDIR)
-					e = errno;
-				if (e == ENOEXEC)
-					break;
-			}
-			stunalloc(cmdname);
-		}
-	}
-
-	/* Map to POSIX errors */
-	if (e == ENOENT || e == ENOTDIR) {
-		exerrno = 127;
-		exerror(EXEXEC, "%s: not found", argv[0]);
-	} else {
-		exerrno = 126;
-		exerror(EXEXEC, "%s: %s", argv[0], strerror(e));
-	}
-}
-
-
-static void
-tryexec(char *cmd, char **argv, char **envp)
-{
-	int e, in;
-	ssize_t n;
-	char buf[256];
-
-	execve(cmd, argv, envp);
-	e = errno;
-	if (e == ENOEXEC) {
-		INTOFF;
-		in = open(cmd, O_RDONLY | O_NONBLOCK);
-		if (in != -1) {
-			n = pread(in, buf, sizeof buf, 0);
-			close(in);
-			if (n > 0 && memchr(buf, '\0', n) != NULL) {
-				errno = ENOEXEC;
-				return;
-			}
-		}
-		*argv = cmd;
-		*--argv = (char *)(_PATH_BSHELL);
-		execve(_PATH_BSHELL, argv, envp);
-	}
-	errno = e;
-}
-
-/*
- * 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 popt is not NULL, options
- * are processed: if an option (indicated by a percent sign) appears in
- * the path entry then *popt will be set to point to it; else *popt will be
- * set to NULL.  If popt is NULL, percent signs are not special.
- */
-
-char *
-padvance(const char **path, const char **popt, const char *name)
-{
-	const char *p, *start;
-	char *q;
-	size_t len, namelen;
-
-	if (*path == NULL)
-		return NULL;
-	start = *path;
-	if (popt != NULL)
-		for (p = start; *p && *p != ':' && *p != '%'; p++)
-			; /* nothing */
-	else
-		for (p = start; *p && *p != ':'; p++)
-			; /* nothing */
-	namelen = strlen(name);
-	len = p - start + namelen + 2;	/* "2" is for '/' and '\0' */
-	STARTSTACKSTR(q);
-	CHECKSTRSPACE(len, q);
-	if (p != start) {
-		memcpy(q, start, p - start);
-		q += p - start;
-		*q++ = '/';
-	}
-	memcpy(q, name, namelen + 1);
-	if (popt != NULL) {
-		if (*p == '%') {
-			*popt = ++p;
-			while (*p && *p != ':')  p++;
-		} else
-			*popt = NULL;
-	}
-	if (*p == ':')
-		*path = p + 1;
-	else
-		*path = NULL;
-	return stalloc(len);
-}
-
-
-
-/*** Command hashing code ***/
-
-
-int
-hashcmd(int argc __unused, char **argv __unused)
-{
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-	int c;
-	int verbose;
-	struct cmdentry entry;
-	char *name;
-	int errors;
-
-	errors = 0;
-	verbose = 0;
-	while ((c = nextopt("rv")) != '\0') {
-		if (c == 'r') {
-			clearcmdentry();
-		} else if (c == 'v') {
-			verbose++;
-		}
-	}
-	if (*argptr == NULL) {
-		for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
-			for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-				if (cmdp->cmdtype == CMDNORMAL)
-					printentry(cmdp, verbose);
-			}
-		}
-		return 0;
-	}
-	while ((name = *argptr) != NULL) {
-		if ((cmdp = cmdlookup(name, 0)) != NULL
-		 && cmdp->cmdtype == CMDNORMAL)
-			delete_cmd_entry();
-		find_command(name, &entry, DO_ERR, pathval());
-		if (entry.cmdtype == CMDUNKNOWN)
-			errors = 1;
-		else if (verbose) {
-			cmdp = cmdlookup(name, 0);
-			if (cmdp != NULL)
-				printentry(cmdp, verbose);
-			else {
-				outfmt(out2, "%s: not found\n", name);
-				errors = 1;
-			}
-			flushall();
-		}
-		argptr++;
-	}
-	return errors;
-}
-
-
-static void
-printentry(struct tblentry *cmdp, int verbose)
-{
-	int idx;
-	const char *path, *opt;
-	char *name;
-
-	if (cmdp->cmdtype == CMDNORMAL) {
-		idx = cmdp->param.index;
-		path = pathval();
-		do {
-			name = padvance(&path, &opt, cmdp->cmdname);
-			stunalloc(name);
-		} while (--idx >= 0);
-		out1str(name);
-	} else if (cmdp->cmdtype == CMDBUILTIN) {
-		out1fmt("builtin %s", cmdp->cmdname);
-	} else if (cmdp->cmdtype == CMDFUNCTION) {
-		out1fmt("function %s", cmdp->cmdname);
-		if (verbose) {
-			INTOFF;
-			name = commandtext(getfuncnode(cmdp->param.func));
-			out1c(' ');
-			out1str(name);
-			ckfree(name);
-			INTON;
-		}
-#ifdef DEBUG
-	} else {
-		error("internal error: cmdtype %d", cmdp->cmdtype);
-#endif
-	}
-	out1c('\n');
-}
-
-
-
-/*
- * Resolve a command name.  If you change this routine, you may have to
- * change the shellexec routine as well.
- */
-
-void
-find_command(const char *name, struct cmdentry *entry, int act,
-    const char *path)
-{
-	struct tblentry *cmdp, loc_cmd;
-	int idx;
-	const char *opt;
-	char *fullname;
-	struct stat statb;
-	int e;
-	int i;
-	int spec;
-	int cd;
-
-	/* If name contains a slash, don't use the hash table */
-	if (strchr(name, '/') != NULL) {
-		entry->cmdtype = CMDNORMAL;
-		entry->u.index = 0;
-		entry->special = 0;
-		return;
-	}
-
-	cd = 0;
-
-	/* If name is in the table, we're done */
-	if ((cmdp = cmdlookup(name, 0)) != NULL) {
-		if (cmdp->cmdtype == CMDFUNCTION && act & DO_NOFUNC)
-			cmdp = NULL;
-		else
-			goto success;
-	}
-
-	/* Check for builtin next */
-	if ((i = find_builtin(name, &spec)) >= 0) {
-		INTOFF;
-		cmdp = cmdlookup(name, 1);
-		if (cmdp->cmdtype == CMDFUNCTION)
-			cmdp = &loc_cmd;
-		cmdp->cmdtype = CMDBUILTIN;
-		cmdp->param.index = i;
-		cmdp->special = spec;
-		INTON;
-		goto success;
-	}
-
-	/* We have to search path. */
-
-	e = ENOENT;
-	idx = -1;
-	for (;(fullname = padvance(&path, &opt, name)) != NULL;
-	    stunalloc(fullname)) {
-		idx++;
-		if (opt) {
-			if (strncmp(opt, "func", 4) == 0) {
-				/* handled below */
-			} else {
-				continue; /* ignore unimplemented options */
-			}
-		}
-		if (fullname[0] != '/')
-			cd = 1;
-		if (stat(fullname, &statb) < 0) {
-			if (errno != ENOENT && errno != ENOTDIR)
-				e = errno;
-			continue;
-		}
-		e = EACCES;	/* if we fail, this will be the error */
-		if (!S_ISREG(statb.st_mode))
-			continue;
-		if (opt) {		/* this is a %func directory */
-			readcmdfile(fullname);
-			if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
-				error("%s not defined in %s", name, fullname);
-			stunalloc(fullname);
-			goto success;
-		}
-#ifdef notdef
-		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));
-		INTOFF;
-		stunalloc(fullname);
-		cmdp = cmdlookup(name, 1);
-		if (cmdp->cmdtype == CMDFUNCTION)
-			cmdp = &loc_cmd;
-		cmdp->cmdtype = CMDNORMAL;
-		cmdp->param.index = idx;
-		cmdp->special = 0;
-		INTON;
-		goto success;
-	}
-
-	if (act & DO_ERR) {
-		if (e == ENOENT || e == ENOTDIR)
-			outfmt(out2, "%s: not found\n", name);
-		else
-			outfmt(out2, "%s: %s\n", name, strerror(e));
-	}
-	entry->cmdtype = CMDUNKNOWN;
-	entry->u.index = 0;
-	entry->special = 0;
-	return;
-
-success:
-	if (cd)
-		cmdtable_cd = 1;
-	entry->cmdtype = cmdp->cmdtype;
-	entry->u = cmdp->param;
-	entry->special = cmdp->special;
-}
-
-
-
-/*
- * Search the table of builtin commands.
- */
-
-int
-find_builtin(const char *name, int *special)
-{
-	const unsigned char *bp;
-	size_t len;
-
-	len = strlen(name);
-	for (bp = builtincmd ; *bp ; bp += 2 + bp[0]) {
-		if (bp[0] == len && memcmp(bp + 2, name, len) == 0) {
-			*special = (bp[1] & BUILTIN_SPECIAL) != 0;
-			return bp[1] & ~BUILTIN_SPECIAL;
-		}
-	}
-	return -1;
-}
-
-
-
-/*
- * Called when a cd is done.  If any entry in cmdtable depends on the current
- * directory, simply clear cmdtable completely.
- */
-
-void
-hashcd(void)
-{
-	if (cmdtable_cd)
-		clearcmdentry();
-}
-
-
-
-/*
- * 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 __unused)
-{
-	clearcmdentry();
-}
-
-
-/*
- * Clear out cached utility locations.
- */
-
-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) {
-				*pp = cmdp->next;
-				ckfree(cmdp);
-			} else {
-				pp = &cmdp->next;
-			}
-		}
-	}
-	cmdtable_cd = 0;
-	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.
- */
-
-static struct tblentry **lastcmdentry;
-
-
-static struct tblentry *
-cmdlookup(const char *name, int add)
-{
-	unsigned int hashval;
-	const char *p;
-	struct tblentry *cmdp;
-	struct tblentry **pp;
-	size_t len;
-
-	p = name;
-	hashval = (unsigned char)*p << 4;
-	while (*p)
-		hashval += *p++;
-	pp = &cmdtable[hashval % CMDTABLESIZE];
-	for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-		if (equal(cmdp->cmdname, name))
-			break;
-		pp = &cmdp->next;
-	}
-	if (add && cmdp == NULL) {
-		INTOFF;
-		len = strlen(name);
-		cmdp = *pp = ckmalloc(sizeof (struct tblentry) + len + 1);
-		cmdp->next = NULL;
-		cmdp->cmdtype = CMDUNKNOWN;
-		memcpy(cmdp->cmdname, name, len + 1);
-		INTON;
-	}
-	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;
-	ckfree(cmdp);
-	INTON;
-}
-
-
-
-/*
- * Add a new command entry, replacing any existing command entry for
- * the same name.
- */
-
-static void
-addcmdentry(const char *name, struct cmdentry *entry)
-{
-	struct tblentry *cmdp;
-
-	INTOFF;
-	cmdp = cmdlookup(name, 1);
-	if (cmdp->cmdtype == CMDFUNCTION) {
-		unreffunc(cmdp->param.func);
-	}
-	cmdp->cmdtype = entry->cmdtype;
-	cmdp->param = entry->u;
-	cmdp->special = entry->special;
-	INTON;
-}
-
-
-/*
- * Define a shell function.
- */
-
-void
-defun(const char *name, union node *func)
-{
-	struct cmdentry entry;
-
-	INTOFF;
-	entry.cmdtype = CMDFUNCTION;
-	entry.u.func = copyfunc(func);
-	entry.special = 0;
-	addcmdentry(name, &entry);
-	INTON;
-}
-
-
-/*
- * Delete a function if it exists.
- * Called with interrupts off.
- */
-
-int
-unsetfunc(const char *name)
-{
-	struct tblentry *cmdp;
-
-	if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
-		unreffunc(cmdp->param.func);
-		delete_cmd_entry();
-		return (0);
-	}
-	return (0);
-}
-
-
-/*
- * Check if a function by a certain name exists.
- */
-int
-isfunc(const char *name)
-{
-	struct tblentry *cmdp;
-	cmdp = cmdlookup(name, 0);
-	return (cmdp != NULL && cmdp->cmdtype == CMDFUNCTION);
-}
-
-
-/*
- * Shared code for the following builtin commands:
- *    type, command -v, command -V
- */
-
-int
-typecmd_impl(int argc, char **argv, int cmd, const char *path)
-{
-	struct cmdentry entry;
-	struct tblentry *cmdp;
-	const char *const *pp;
-	struct alias *ap;
-	int i;
-	int error1 = 0;
-
-	if (path != pathval())
-		clearcmdentry();
-
-	for (i = 1; i < argc; i++) {
-		/* First look at the keywords */
-		for (pp = parsekwd; *pp; pp++)
-			if (**pp == *argv[i] && equal(*pp, argv[i]))
-				break;
-
-		if (*pp) {
-			if (cmd == TYPECMD_SMALLV)
-				out1fmt("%s\n", argv[i]);
-			else
-				out1fmt("%s is a shell keyword\n", argv[i]);
-			continue;
-		}
-
-		/* Then look at the aliases */
-		if ((ap = lookupalias(argv[i], 1)) != NULL) {
-			if (cmd == TYPECMD_SMALLV) {
-				out1fmt("alias %s=", argv[i]);
-				out1qstr(ap->val);
-				outcslow('\n', out1);
-			} else
-				out1fmt("%s is an alias for %s\n", argv[i],
-				    ap->val);
-			continue;
-		}
-
-		/* Then check if it is a tracked alias */
-		if ((cmdp = cmdlookup(argv[i], 0)) != NULL) {
-			entry.cmdtype = cmdp->cmdtype;
-			entry.u = cmdp->param;
-			entry.special = cmdp->special;
-		}
-		else {
-			/* Finally use brute force */
-			find_command(argv[i], &entry, 0, path);
-		}
-
-		switch (entry.cmdtype) {
-		case CMDNORMAL: {
-			if (strchr(argv[i], '/') == NULL) {
-				const char *path2 = path;
-				const char *opt2;
-				char *name;
-				int j = entry.u.index;
-				do {
-					name = padvance(&path2, &opt2, argv[i]);
-					stunalloc(name);
-				} while (--j >= 0);
-				if (cmd == TYPECMD_SMALLV)
-					out1fmt("%s\n", name);
-				else
-					out1fmt("%s is%s %s\n", argv[i],
-					    (cmdp && cmd == TYPECMD_TYPE) ?
-						" a tracked alias for" : "",
-					    name);
-			} else {
-				if (faccessat(AT_FDCWD, argv[i], X_OK, AT_EACCESS) == 0) {
-					if (cmd == TYPECMD_SMALLV)
-						out1fmt("%s\n", argv[i]);
-					else
-						out1fmt("%s is %s\n", argv[i],
-						    argv[i]);
-				} else {
-					if (cmd != TYPECMD_SMALLV)
-						outfmt(out2, "%s: %s\n",
-						    argv[i], strerror(errno));
-					error1 |= 127;
-				}
-			}
-			break;
-		}
-		case CMDFUNCTION:
-			if (cmd == TYPECMD_SMALLV)
-				out1fmt("%s\n", argv[i]);
-			else
-				out1fmt("%s is a shell function\n", argv[i]);
-			break;
-
-		case CMDBUILTIN:
-			if (cmd == TYPECMD_SMALLV)
-				out1fmt("%s\n", argv[i]);
-			else if (entry.special)
-				out1fmt("%s is a special shell builtin\n",
-				    argv[i]);
-			else
-				out1fmt("%s is a shell builtin\n", argv[i]);
-			break;
-
-		default:
-			if (cmd != TYPECMD_SMALLV)
-				outfmt(out2, "%s: not found\n", argv[i]);
-			error1 |= 127;
-			break;
-		}
-	}
-
-	if (path != pathval())
-		clearcmdentry();
-
-	return error1;
-}
-
-/*
- * Locate and print what a word is...
- */
-
-int
-typecmd(int argc, char **argv)
-{
-	if (argc > 2 && strcmp(argv[1], "--") == 0)
-		argc--, argv++;
-	return typecmd_impl(argc, argv, TYPECMD_TYPE, bltinlookup("PATH", 1));
-}