+++ /dev/null
-/*-
- * 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.
- * 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)
-static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/exec.c,v 1.27 2009/12/05 18:55:16 ed Exp $");
-
-#include "namespace.h"
-#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>
-
-#include <stdarg.h>
-#include "un-namespace.h"
-#include "libc_private.h"
-
-#include <crt_externs.h>
-#define environ (*_NSGetEnviron())
-
-int
-_execvpe(const char *name, char * const argv[], char * const envp[]);
-
-int
-execl(const char *name, const char *arg, ...)
-{
- va_list ap;
- const char **argv;
- int n;
-
- va_start(ap, arg);
- 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);
- }
- va_start(ap, arg);
- n = 1;
- argv[0] = arg;
- while ((argv[n] = va_arg(ap, char *)) != NULL)
- n++;
- va_end(ap);
- return (_execve(name, __DECONST(char **, argv), environ));
-}
-
-int
-execle(const char *name, const char *arg, ...)
-{
- va_list ap;
- const char **argv;
- char **envp;
- int n;
-
- va_start(ap, arg);
- 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);
- }
- va_start(ap, arg);
- n = 1;
- argv[0] = arg;
- while ((argv[n] = va_arg(ap, char *)) != NULL)
- n++;
- envp = va_arg(ap, char **);
- va_end(ap);
- return (_execve(name, __DECONST(char **, argv), envp));
-}
-
-int
-execlp(const char *name, const char *arg, ...)
-{
- va_list ap;
- const char **argv;
- int n;
-
- va_start(ap, arg);
- 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);
- }
- va_start(ap, arg);
- n = 1;
- argv[0] = arg;
- while ((argv[n] = va_arg(ap, char *)) != NULL)
- n++;
- va_end(ap);
- return (execvp(name, __DECONST(char **, argv)));
-}
-
-int
-execv(name, argv)
- const char *name;
- char * const *argv;
-{
- (void)_execve(name, argv, environ);
- return (-1);
-}
-
-int
-execvp(const char *name, char * const *argv)
-{
- return (_execvpe(name, argv, environ));
-}
-
-static int
-execvPe(const char *name, const char *path, char * const *argv,
- char * const *envp)
-{
- const char **memp;
- size_t cnt, lp, ln;
- int eacces, save_errno;
- char *cur, buf[MAXPATHLEN];
- const char *p, *bp;
- struct stat sb;
-
- eacces = 0;
-
- /* If it's an absolute or relative path name, it's easy. */
- if (index(name, '/')) {
- bp = name;
- cur = 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);
- }
-
- cur = alloca(strlen(path) + 1);
- if (cur == NULL) {
- errno = ENOMEM;
- return (-1);
- }
- strcpy(cur, path);
- while ((p = strsep(&cur, ":")) != NULL) {
- /*
- * It's a SHELL path -- double, leading and trailing colons
- * mean the current directory.
- */
- if (*p == '\0') {
- 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, envp);
- 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) {
- /* errno = ENOMEM; XXX override ENOEXEC? */
- goto done;
- }
- memp[0] = "sh";
- memp[1] = bp;
- bcopy(argv + 1, memp + 2, cnt * sizeof(char *));
- (void)_execve(_PATH_BSHELL,
- __DECONST(char **, memp), envp);
- 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 if (cur)
- errno = ENOENT;
- /* else use existing errno from _execve */
-done:
- return (-1);
-}
-
-int
-execvP(const char *name, const char *path, char * const argv[])
-{
- return execvPe(name, path, argv, environ);
-}
-
-__private_extern__ int
-_execvpe(const char *name, char * const argv[], char * const envp[])
-{
- const char *path;
-
- /* Get the path we're searching. */
- if ((path = getenv("PATH")) == NULL)
- path = _PATH_DEFPATH;
-
- return (execvPe(name, path, argv, envp));
-}
projects / apple / libc.git / blobdiff