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/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <stdio.h>
#include <stddef.h>
#include <signal.h>
#include <unistd.h>
#include <sys/wait.h>
#include <stdlib.h>
libc_hidden_proto(_exit)
libc_hidden_proto(wait4)
libc_hidden_proto(execl)
libc_hidden_proto(signal)
libc_hidden_proto(vfork)
/* uClinux-2.0 has vfork, but Linux 2.0 doesn't */
#include <sys/syscall.h>
#ifndef __NR_vfork
# define vfork fork
libc_hidden_proto(fork)
#endif
extern __typeof(system) __libc_system;
int __libc_system(const char *command)
{
int wait_val, pid;
__sighandler_t save_quit, save_int, save_chld;
if (command == 0)
return 1;
save_quit = signal(SIGQUIT, SIG_IGN);
save_int = signal(SIGINT, SIG_IGN);
save_chld = signal(SIGCHLD, SIG_DFL);
if ((pid = vfork()) < 0) {
signal(SIGQUIT, save_quit);
signal(SIGINT, save_int);
signal(SIGCHLD, save_chld);
return -1;
}
if (pid == 0) {
signal(SIGQUIT, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
execl("/bin/sh", "sh", "-c", command, (char *) 0);
_exit(127);
}
/* Signals are not absolutly guarenteed with vfork */
signal(SIGQUIT, SIG_IGN);
signal(SIGINT, SIG_IGN);
#if 0
__printf("Waiting for child %d\n", pid);
#endif
if (wait4(pid, &wait_val, 0, 0) == -1)
wait_val = -1;
signal(SIGQUIT, save_quit);
signal(SIGINT, save_int);
signal(SIGCHLD, save_chld);
return wait_val;
}
weak_alias(__libc_system,system)
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