1994-05-27 05:00:24 +00:00
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/*
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* Copyright (c) 1988, 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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2013-06-13 00:19:30 +00:00
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* 3. Neither the name of the University nor the names of its contributors
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1994-05-27 05:00:24 +00:00
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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[] = "@(#)system.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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2002-03-22 21:53:29 +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/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stddef.h>
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2013-08-13 20:38:55 +00:00
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#include <string.h>
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1994-05-27 05:00:24 +00:00
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#include <unistd.h>
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#include <paths.h>
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1996-06-05 00:08:54 +00:00
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#include <errno.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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#include "libc_private.h"
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1994-05-27 05:00:24 +00:00
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2000-01-12 09:23:48 +00:00
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int
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2009-12-05 19:31:38 +00:00
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__system(const char *command)
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1994-05-27 05:00:24 +00:00
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{
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2001-10-03 11:01:39 +00:00
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pid_t pid, savedpid;
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1996-06-05 00:08:54 +00:00
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int pstat;
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struct sigaction ign, intact, quitact;
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sigset_t newsigblock, oldsigblock;
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1994-05-27 05:00:24 +00:00
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if (!command) /* just checking... */
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return(1);
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1996-06-05 00:08:54 +00:00
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(void)sigemptyset(&newsigblock);
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1996-06-08 15:28:11 +00:00
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(void)sigaddset(&newsigblock, SIGCHLD);
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2001-01-24 13:01:12 +00:00
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(void)_sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
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2013-08-13 20:38:55 +00:00
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switch(pid = vfork()) {
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1994-05-27 05:00:24 +00:00
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case -1: /* error */
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2013-08-13 20:38:55 +00:00
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(void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
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return (-1);
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1994-05-27 05:00:24 +00:00
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case 0: /* child */
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1996-06-05 00:08:54 +00:00
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/*
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* Restore original signal dispositions and exec the command.
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*/
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2001-01-24 13:01:12 +00:00
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(void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
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1994-05-27 05:00:24 +00:00
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execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL);
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_exit(127);
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}
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2013-08-13 20:38:55 +00:00
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/*
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* If we are running means that the child has either completed
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* its execve, or has failed.
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* Block SIGINT/QUIT because sh -c handles it and wait for
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* it to clean up.
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*/
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memset(&ign, 0, sizeof(ign));
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ign.sa_handler = SIG_IGN;
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(void)sigemptyset(&ign.sa_mask);
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(void)_sigaction(SIGINT, &ign, &intact);
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(void)_sigaction(SIGQUIT, &ign, &quitact);
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savedpid = pid;
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do {
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pid = _wait4(savedpid, &pstat, 0, (struct rusage *)0);
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} while (pid == -1 && errno == EINTR);
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2001-01-24 13:01:12 +00:00
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(void)_sigaction(SIGINT, &intact, NULL);
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(void)_sigaction(SIGQUIT, &quitact, NULL);
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(void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
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1996-06-05 00:08:54 +00:00
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return(pid == -1 ? -1 : pstat);
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1994-05-27 05:00:24 +00:00
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}
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2000-01-12 09:23:48 +00:00
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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
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__weak_reference(__system, system);
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2001-01-24 13:01:12 +00:00
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__weak_reference(__system, _system);
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