+++ /dev/null
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * 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.
- */
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <paths.h>
-
-#ifdef __STDC__
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
-
-#if defined(__APPLE__)
-#include <crt_externs.h>
-#define environ (*_NSGetEnviron())
-#else
-extern char **environ;
-#endif
-
-int
-#ifdef __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;
- char **argv;
- int n;
-
-#ifdef __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- n = 1;
- while (va_arg(ap, char *) != NULL)
- n++;
- va_end(ap);
- argv = alloca((n + 1) * sizeof(*argv));
- if (argv == NULL) {
- errno = ENOMEM;
- return (-1);
- }
-#ifdef __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- n = 1;
- argv[0] = (char *)arg;
- while ((argv[n] = va_arg(ap, char *)) != NULL)
- n++;
- va_end(ap);
- return (execve(name, argv, environ));
-}
-
-int
-#ifdef __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;
- char **argv, **envp;
- int n;
-
-#ifdef __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- n = 1;
- while (va_arg(ap, char *) != NULL)
- n++;
- va_end(ap);
- argv = alloca((n + 1) * sizeof(*argv));
- if (argv == NULL) {
- errno = ENOMEM;
- return (-1);
- }
-#ifdef __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- n = 1;
- argv[0] = (char *)arg;
- while ((argv[n] = va_arg(ap, char *)) != NULL)
- n++;
- envp = va_arg(ap, char **);
- va_end(ap);
- return (execve(name, argv, envp));
-}
-
-int
-#ifdef __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;
- char **argv;
- int n;
-
-#ifdef __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- n = 1;
- while (va_arg(ap, char *) != NULL)
- n++;
- va_end(ap);
- argv = alloca((n + 1) * sizeof(*argv));
- if (argv == NULL) {
- errno = ENOMEM;
- return (-1);
- }
-#ifdef __STDC__
- va_start(ap, arg);
-#else
- va_start(ap);
-#endif
- n = 1;
- argv[0] = (char *)arg;
- while ((argv[n] = va_arg(ap, char *)) != NULL)
- n++;
- va_end(ap);
- return (execvp(name, argv));
-}
-
-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 = 0, etxtbsy = 0;
- char *bp, *cur, *path, buf[MAXPATHLEN];
-
- /*
- * Do not allow null name
- */
- if (name == NULL || *name == '\0') {
- errno = ENOENT;
- return (-1);
- }
-
- /* If it's an absolute or relative path name, it's easy. */
- if (strchr(name, '/')) {
- bp = (char *)name;
- cur = path = NULL;
- goto retry;
- }
- bp = buf;
-
- /* Get the path we're searching. */
- if (!(path = getenv("PATH")))
- path = _PATH_DEFPATH;
- cur = alloca(strlen(path) + 1);
- if (cur == NULL) {
- errno = ENOMEM;
- return (-1);
- }
- strcpy(cur, path);
- path = cur;
- 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)) {
- struct iovec iov[3];
-
- iov[0].iov_base = "execvp: ";
- iov[0].iov_len = 8;
- iov[1].iov_base = p;
- iov[1].iov_len = lp;
- iov[2].iov_base = ": path too long\n";
- iov[2].iov_len = 16;
- (void)writev(STDERR_FILENO, iov, 3);
- 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 = alloca((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);
- goto done;
- case ENOMEM:
- goto done;
- case ENOTDIR:
- break;
- case ETXTBSY:
- /*
- * We used to retry here, but sh(1) doesn't.
- */
- goto done;
- case EACCES:
- eacces = 1;
- break;
- default:
- goto done;
- }
- }
- if (eacces)
- errno = EACCES;
- else if (!errno)
- errno = ENOENT;
-done:
- return (-1);
-}
projects / apple / libc.git / blobdiff