summaryrefslogtreecommitdiffstats
path: root/lib/libc/gen/exec.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libc/gen/exec.c')
-rw-r--r--lib/libc/gen/exec.c303
1 files changed, 0 insertions, 303 deletions
diff --git a/lib/libc/gen/exec.c b/lib/libc/gen/exec.c
deleted file mode 100644
index 3b77ee9..0000000
--- a/lib/libc/gen/exec.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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 defined(LIBC_SCCS) && !defined(lint)
-#if 0
-static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93";
-#endif
-static const char rcsid[] =
- "$Id: exec.c,v 1.6 1997/10/14 07:23:16 bde Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <paths.h>
-
-#if __STDC__
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
-
-extern char **environ;
-
-static char **
-buildargv(ap, arg, envpp)
- va_list ap;
- const char *arg;
- char ***envpp;
-{
- register char **argv, **nargv;
- register int memsize, off;
-
- argv = NULL;
- for (off = memsize = 0;; ++off) {
- if (off >= memsize) {
- memsize += 50; /* Starts out at 0. */
- memsize *= 2; /* Ramp up fast. */
- nargv = realloc(argv, memsize * sizeof(char *));
- if (nargv == NULL) {
- free(argv);
- return (NULL);
- }
- argv = nargv;
- if (off == 0) {
- argv[0] = (char *)arg;
- off = 1;
- }
- }
- if (!(argv[off] = va_arg(ap, char *)))
- break;
- }
- /* Get environment pointer if user supposed to provide one. */
- if (envpp)
- *envpp = va_arg(ap, char **);
- return (argv);
-}
-
-int
-#if __STDC__
-execl(const char *name, const char *arg, ...)
-#else
-execl(name, arg, va_alist)
- const char *name;
- const char *arg;
- va_dcl
-#endif
-{
- va_list ap;
- int sverrno;
- char **argv;
-
-#if __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- if ( (argv = buildargv(ap, arg, NULL)) )
- (void)execve(name, argv, environ);
- va_end(ap);
- sverrno = errno;
- free(argv);
- errno = sverrno;
- return (-1);
-}
-
-int
-#if __STDC__
-execle(const char *name, const char *arg, ...)
-#else
-execle(name, arg, va_alist)
- const char *name;
- const char *arg;
- va_dcl
-#endif
-{
- va_list ap;
- int sverrno;
- char **argv, **envp;
-
-#if __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- if ( (argv = buildargv(ap, arg, &envp)) )
- (void)execve(name, argv, envp);
- va_end(ap);
- sverrno = errno;
- free(argv);
- errno = sverrno;
- return (-1);
-}
-
-int
-#if __STDC__
-execlp(const char *name, const char *arg, ...)
-#else
-execlp(name, arg, va_alist)
- const char *name;
- const char *arg;
- va_dcl
-#endif
-{
- va_list ap;
- int sverrno;
- char **argv;
-
-#if __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- if ( (argv = buildargv(ap, arg, NULL)) )
- (void)execvp(name, argv);
- va_end(ap);
- sverrno = errno;
- free(argv);
- errno = sverrno;
- return (-1);
-}
-
-int
-execv(name, argv)
- const char *name;
- char * const *argv;
-{
- (void)execve(name, argv, environ);
- return (-1);
-}
-
-int
-execvp(name, argv)
- const char *name;
- char * const *argv;
-{
- char **memp;
- register int cnt, lp, ln;
- register char *p;
- int eacces, save_errno;
- char *bp, *cur, *path, buf[MAXPATHLEN];
- struct stat sb;
-
- eacces = 0;
-
- /* If it's an absolute or relative path name, it's easy. */
- if (index(name, '/')) {
- bp = (char *)name;
- cur = path = NULL;
- goto retry;
- }
- bp = buf;
-
- /* If it's an empty path name, fail in the usual POSIX way. */
- if (*name == '\0') {
- errno = ENOENT;
- return (-1);
- }
-
- /* Get the path we're searching. */
- if (!(path = getenv("PATH")))
- path = _PATH_DEFPATH;
- cur = path = strdup(path);
-
- while ( (p = strsep(&cur, ":")) ) {
- /*
- * It's a SHELL path -- double, leading and trailing colons
- * mean the current directory.
- */
- if (!*p) {
- p = ".";
- lp = 1;
- } else
- lp = strlen(p);
- ln = strlen(name);
-
- /*
- * If the path is too long complain. This is a possible
- * security issue; given a way to make the path too long
- * the user may execute the wrong program.
- */
- if (lp + ln + 2 > sizeof(buf)) {
- (void)write(STDERR_FILENO, "execvp: ", 8);
- (void)write(STDERR_FILENO, p, lp);
- (void)write(STDERR_FILENO, ": path too long\n", 16);
- continue;
- }
- bcopy(p, buf, lp);
- buf[lp] = '/';
- bcopy(name, buf + lp + 1, ln);
- buf[lp + ln + 1] = '\0';
-
-retry: (void)execve(bp, argv, environ);
- switch(errno) {
- case E2BIG:
- goto done;
- case ELOOP:
- case ENAMETOOLONG:
- case ENOENT:
- break;
- case ENOEXEC:
- for (cnt = 0; argv[cnt]; ++cnt)
- ;
- memp = malloc((cnt + 2) * sizeof(char *));
- if (memp == NULL)
- goto done;
- memp[0] = "sh";
- memp[1] = bp;
- bcopy(argv + 1, memp + 2, cnt * sizeof(char *));
- (void)execve(_PATH_BSHELL, memp, environ);
- free(memp);
- goto done;
- case ENOMEM:
- goto done;
- case ENOTDIR:
- break;
- case ETXTBSY:
- /*
- * We used to retry here, but sh(1) doesn't.
- */
- goto done;
- default:
- /*
- * EACCES may be for an inaccessible directory or
- * a non-executable file. Call stat() to decide
- * which. This also handles ambiguities for EFAULT
- * and EIO, and undocumented errors like ESTALE.
- * We hope that the race for a stat() is unimportant.
- */
- save_errno = errno;
- if (stat(bp, &sb) != 0)
- break;
- if (save_errno == EACCES) {
- eacces = 1;
- continue;
- }
- errno = save_errno;
- goto done;
- }
- }
- if (eacces)
- errno = EACCES;
- else
- errno = ENOENT;
-done: if (path)
- free(path);
- return (-1);
-}
OpenPOWER on IntegriCloud