1994-05-27 05:00:24 +00:00
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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2002-02-01 01:08:48 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1994-05-27 05:00:24 +00:00
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2001-01-24 13:01:12 +00:00
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#include "namespace.h"
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1994-05-27 05:00:24 +00:00
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#include <sys/param.h>
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#include <sys/types.h>
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1997-10-14 07:23:16 +00:00
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#include <sys/stat.h>
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1994-05-27 05:00:24 +00:00
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <paths.h>
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#include <stdarg.h>
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2001-01-24 13:01:12 +00:00
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#include "un-namespace.h"
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1994-05-27 05:00:24 +00:00
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extern char **environ;
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int
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execl(const char *name, const char *arg, ...)
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{
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va_list ap;
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char **argv;
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1998-10-14 18:53:36 +00:00
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int n;
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1994-05-27 05:00:24 +00:00
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1998-10-14 18:53:36 +00:00
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va_start(ap, arg);
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1998-10-14 20:23:40 +00:00
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n = 1;
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1998-10-14 18:53:36 +00:00
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while (va_arg(ap, char *) != NULL)
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1998-10-15 17:14:15 +00:00
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n++;
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1998-10-14 18:53:36 +00:00
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va_end(ap);
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1998-10-15 17:14:15 +00:00
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argv = alloca((n + 1) * sizeof(*argv));
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1999-03-23 16:40:34 +00:00
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if (argv == NULL) {
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errno = ENOMEM;
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1998-10-14 18:53:36 +00:00
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return (-1);
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1999-03-23 16:40:34 +00:00
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}
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1994-05-27 05:00:24 +00:00
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va_start(ap, arg);
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1998-10-14 20:23:40 +00:00
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n = 1;
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1998-10-15 17:14:15 +00:00
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argv[0] = (char *)arg;
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1998-10-14 18:53:36 +00:00
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while ((argv[n] = va_arg(ap, char *)) != NULL)
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n++;
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1994-05-27 05:00:24 +00:00
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va_end(ap);
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2001-01-24 13:01:12 +00:00
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return (_execve(name, argv, environ));
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1994-05-27 05:00:24 +00:00
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}
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int
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execle(const char *name, const char *arg, ...)
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{
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va_list ap;
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char **argv, **envp;
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1998-10-15 17:14:15 +00:00
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int n;
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1994-05-27 05:00:24 +00:00
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va_start(ap, arg);
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1998-10-15 17:14:15 +00:00
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n = 1;
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while (va_arg(ap, char *) != NULL)
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n++;
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1994-05-27 05:00:24 +00:00
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va_end(ap);
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1998-10-15 17:14:15 +00:00
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argv = alloca((n + 1) * sizeof(*argv));
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1999-03-23 16:40:34 +00:00
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if (argv == NULL) {
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errno = ENOMEM;
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1998-10-15 17:14:15 +00:00
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return (-1);
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1999-03-23 16:40:34 +00:00
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}
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1998-10-15 17:14:15 +00:00
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|
va_start(ap, arg);
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n = 1;
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argv[0] = (char *)arg;
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while ((argv[n] = va_arg(ap, char *)) != NULL)
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n++;
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envp = va_arg(ap, char **);
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va_end(ap);
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2001-01-24 13:01:12 +00:00
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return (_execve(name, argv, envp));
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1994-05-27 05:00:24 +00:00
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}
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int
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execlp(const char *name, const char *arg, ...)
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{
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va_list ap;
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char **argv;
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1999-03-23 16:40:34 +00:00
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int n;
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1994-05-27 05:00:24 +00:00
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va_start(ap, arg);
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1999-03-23 16:40:34 +00:00
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n = 1;
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while (va_arg(ap, char *) != NULL)
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n++;
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1994-05-27 05:00:24 +00:00
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va_end(ap);
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1999-03-23 16:40:34 +00:00
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argv = alloca((n + 1) * sizeof(*argv));
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if (argv == NULL) {
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errno = ENOMEM;
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return (-1);
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}
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va_start(ap, arg);
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n = 1;
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argv[0] = (char *)arg;
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while ((argv[n] = va_arg(ap, char *)) != NULL)
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n++;
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va_end(ap);
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return (execvp(name, argv));
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1994-05-27 05:00:24 +00:00
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}
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int
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execv(name, argv)
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const char *name;
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char * const *argv;
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{
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2001-01-24 13:01:12 +00:00
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(void)_execve(name, argv, environ);
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1994-05-27 05:00:24 +00:00
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return (-1);
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}
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int
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2003-07-01 12:30:03 +00:00
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execvp(const char *name, char * const *argv)
|
2003-06-29 17:33:34 +00:00
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{
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const char *path;
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/* Get the path we're searching. */
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2003-07-01 12:30:03 +00:00
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if ((path = getenv("PATH")) == NULL)
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2003-06-29 17:33:34 +00:00
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path = _PATH_DEFPATH;
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2003-07-01 12:30:03 +00:00
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return (execvP(name, path, argv));
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2003-06-29 17:33:34 +00:00
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}
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int
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execvP(name, path, argv)
|
1994-05-27 05:00:24 +00:00
|
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const char *name;
|
2003-06-29 17:33:34 +00:00
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const char *path;
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1994-05-27 05:00:24 +00:00
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char * const *argv;
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{
|
1994-12-12 01:15:01 +00:00
|
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|
char **memp;
|
2002-02-01 01:08:48 +00:00
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|
int cnt, lp, ln;
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char *p;
|
1997-10-14 07:23:16 +00:00
|
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|
int eacces, save_errno;
|
2003-06-29 17:33:34 +00:00
|
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|
char *bp, *cur, buf[MAXPATHLEN];
|
1997-10-14 07:23:16 +00:00
|
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|
struct stat sb;
|
1994-05-27 05:00:24 +00:00
|
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|
1997-10-14 07:23:16 +00:00
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|
eacces = 0;
|
1996-11-18 16:56:51 +00:00
|
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|
1994-05-27 05:00:24 +00:00
|
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|
/* If it's an absolute or relative path name, it's easy. */
|
|
|
|
if (index(name, '/')) {
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|
|
bp = (char *)name;
|
2003-06-29 17:33:34 +00:00
|
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|
cur = NULL;
|
1994-05-27 05:00:24 +00:00
|
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|
goto retry;
|
|
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|
}
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|
bp = buf;
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|
|
|
1996-11-18 19:24:47 +00:00
|
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|
/* If it's an empty path name, fail in the usual POSIX way. */
|
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|
if (*name == '\0') {
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|
errno = ENOENT;
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|
return (-1);
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|
|
}
|
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|
|
|
1999-03-23 16:40:34 +00:00
|
|
|
cur = alloca(strlen(path) + 1);
|
|
|
|
if (cur == NULL) {
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|
|
errno = ENOMEM;
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|
|
|
return (-1);
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|
|
|
}
|
|
|
|
strcpy(cur, path);
|
2003-07-01 12:30:03 +00:00
|
|
|
while ((p = strsep(&cur, ":")) != NULL) {
|
1994-05-27 05:00:24 +00:00
|
|
|
/*
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|
|
|
* It's a SHELL path -- double, leading and trailing colons
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|
|
* mean the current directory.
|
|
|
|
*/
|
2003-07-01 12:30:03 +00:00
|
|
|
if (*p == '\0') {
|
1994-05-27 05:00:24 +00:00
|
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|
p = ".";
|
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|
|
lp = 1;
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|
|
|
} else
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|
|
lp = strlen(p);
|
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|
|
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)) {
|
2003-06-29 17:33:34 +00:00
|
|
|
(void)_write(STDERR_FILENO, "execvP: ", 8);
|
Simplify sytem call renaming. Instead of _foo() <-- _libc_foo <-- foo(),
just use _foo() <-- foo(). In the case of a libpthread that doesn't do
call conversion (such as linuxthreads and our upcoming libpthread), this
is adequate. In the case of libc_r, we still need three names, which are
now _thread_sys_foo() <-- _foo() <-- foo().
Convert all internal libc usage of: aio_suspend(), close(), fsync(), msync(),
nanosleep(), open(), fcntl(), read(), and write() to _foo() instead of foo().
Remove all internal libc usage of: creat(), pause(), sleep(), system(),
tcdrain(), wait(), and waitpid().
Make thread cancellation fully POSIX-compliant.
Suggested by: deischen
2000-01-27 23:07:25 +00:00
|
|
|
(void)_write(STDERR_FILENO, p, lp);
|
|
|
|
(void)_write(STDERR_FILENO, ": path too long\n",
|
2000-01-12 09:23:48 +00:00
|
|
|
16);
|
1994-05-27 05:00:24 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
bcopy(p, buf, lp);
|
|
|
|
buf[lp] = '/';
|
|
|
|
bcopy(name, buf + lp + 1, ln);
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|
|
|
buf[lp + ln + 1] = '\0';
|
|
|
|
|
2001-01-24 13:01:12 +00:00
|
|
|
retry: (void)_execve(bp, argv, environ);
|
2003-07-01 12:30:03 +00:00
|
|
|
switch (errno) {
|
1997-10-14 07:23:16 +00:00
|
|
|
case E2BIG:
|
|
|
|
goto done;
|
|
|
|
case ELOOP:
|
|
|
|
case ENAMETOOLONG:
|
1994-05-27 05:00:24 +00:00
|
|
|
case ENOENT:
|
|
|
|
break;
|
|
|
|
case ENOEXEC:
|
1994-12-12 01:15:01 +00:00
|
|
|
for (cnt = 0; argv[cnt]; ++cnt)
|
|
|
|
;
|
1999-03-24 02:43:05 +00:00
|
|
|
memp = alloca((cnt + 2) * sizeof(char *));
|
1999-03-23 16:40:34 +00:00
|
|
|
if (memp == NULL) {
|
|
|
|
/* errno = ENOMEM; XXX override ENOEXEC? */
|
1994-12-12 01:15:01 +00:00
|
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|
goto done;
|
1999-03-23 16:40:34 +00:00
|
|
|
}
|
1994-05-27 05:00:24 +00:00
|
|
|
memp[0] = "sh";
|
|
|
|
memp[1] = bp;
|
|
|
|
bcopy(argv + 1, memp + 2, cnt * sizeof(char *));
|
2001-01-24 13:01:12 +00:00
|
|
|
(void)_execve(_PATH_BSHELL, memp, environ);
|
1994-05-27 05:00:24 +00:00
|
|
|
goto done;
|
1997-10-14 07:23:16 +00:00
|
|
|
case ENOMEM:
|
|
|
|
goto done;
|
|
|
|
case ENOTDIR:
|
|
|
|
break;
|
1994-05-27 05:00:24 +00:00
|
|
|
case ETXTBSY:
|
1997-10-14 07:23:16 +00:00
|
|
|
/*
|
|
|
|
* We used to retry here, but sh(1) doesn't.
|
|
|
|
*/
|
|
|
|
goto done;
|
1994-05-27 05:00:24 +00:00
|
|
|
default:
|
1997-10-14 07:23:16 +00:00
|
|
|
/*
|
|
|
|
* 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;
|
1997-11-20 15:09:38 +00:00
|
|
|
if (stat(bp, &sb) != 0)
|
1997-10-14 07:23:16 +00:00
|
|
|
break;
|
|
|
|
if (save_errno == EACCES) {
|
|
|
|
eacces = 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
errno = save_errno;
|
1994-05-27 05:00:24 +00:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (eacces)
|
|
|
|
errno = EACCES;
|
1997-10-14 07:23:16 +00:00
|
|
|
else
|
1994-05-27 05:00:24 +00:00
|
|
|
errno = ENOENT;
|
1999-03-23 16:40:34 +00:00
|
|
|
done:
|
1994-05-27 05:00:24 +00:00
|
|
|
return (-1);
|
|
|
|
}
|