/* * 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)