99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 1988, 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[] = "@(#)system.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <paths.h>
|
|
#include <errno.h>
|
|
#include "un-namespace.h"
|
|
#include "libc_private.h"
|
|
|
|
int
|
|
__system(command)
|
|
const char *command;
|
|
{
|
|
pid_t pid, savedpid;
|
|
int pstat;
|
|
struct sigaction ign, intact, quitact;
|
|
sigset_t newsigblock, oldsigblock;
|
|
|
|
if (!command) /* just checking... */
|
|
return(1);
|
|
|
|
/*
|
|
* Ignore SIGINT and SIGQUIT, block SIGCHLD. Remember to save
|
|
* existing signal dispositions.
|
|
*/
|
|
ign.sa_handler = SIG_IGN;
|
|
(void)sigemptyset(&ign.sa_mask);
|
|
ign.sa_flags = 0;
|
|
(void)_sigaction(SIGINT, &ign, &intact);
|
|
(void)_sigaction(SIGQUIT, &ign, &quitact);
|
|
(void)sigemptyset(&newsigblock);
|
|
(void)sigaddset(&newsigblock, SIGCHLD);
|
|
(void)_sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
|
|
switch(pid = fork()) {
|
|
case -1: /* error */
|
|
break;
|
|
case 0: /* child */
|
|
/*
|
|
* Restore original signal dispositions and exec the command.
|
|
*/
|
|
(void)_sigaction(SIGINT, &intact, NULL);
|
|
(void)_sigaction(SIGQUIT, &quitact, NULL);
|
|
(void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
|
|
execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL);
|
|
_exit(127);
|
|
default: /* parent */
|
|
savedpid = pid;
|
|
do {
|
|
pid = _wait4(savedpid, &pstat, 0, (struct rusage *)0);
|
|
} while (pid == -1 && errno == EINTR);
|
|
break;
|
|
}
|
|
(void)_sigaction(SIGINT, &intact, NULL);
|
|
(void)_sigaction(SIGQUIT, &quitact, NULL);
|
|
(void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
|
|
return(pid == -1 ? -1 : pstat);
|
|
}
|
|
|
|
__weak_reference(__system, system);
|
|
__weak_reference(__system, _system);
|