diff options
Diffstat (limited to 'newlib/libc/sys/linux/system.c')
| -rw-r--r-- | newlib/libc/sys/linux/system.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/newlib/libc/sys/linux/system.c b/newlib/libc/sys/linux/system.c deleted file mode 100644 index f8edfbf63..000000000 --- a/newlib/libc/sys/linux/system.c +++ /dev/null @@ -1,158 +0,0 @@ -/* Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> -#include <stdlib.h> -#include <unistd.h> -#include <sys/wait.h> -#include <signal.h> -#include <sys/types.h> -#include <errno.h> -#include <machine/weakalias.h> - - -#ifndef HAVE_GNU_LD -#define __environ environ -#endif - -#define SHELL_PATH "/bin/sh" /* Path of the shell. */ -#define SHELL_NAME "sh" /* Name to give it. */ - -/* Execute LINE as a shell command, returning its status. */ -int -__libc_system (const char *line) -{ - int status, save; - pid_t pid; - struct sigaction sa, intr, quit; -#ifndef WAITPID_CANNOT_BLOCK_SIGCHLD - sigset_t block, omask; -#endif - - if (line == NULL) - /* Check that we have a command processor available. It might - not be available after a chroot(), for example. */ - return __libc_system ("exit 0") == 0; - - sa.sa_handler = SIG_IGN; - sa.sa_flags = 0; - sigemptyset (&sa.sa_mask); - - if (sigaction (SIGINT, &sa, &intr) < 0) - return -1; - if (sigaction (SIGQUIT, &sa, &quit) < 0) - { - save = errno; - (void) sigaction (SIGINT, &intr, (struct sigaction *) NULL); - errno = save; - return -1; - } - -#ifndef WAITPID_CANNOT_BLOCK_SIGCHLD - -/* SCO 3.2v4 has a bug where `waitpid' will never return if SIGCHLD is - blocked. This makes it impossible for `system' to be implemented in - compliance with POSIX.2-1992. They have acknowledged that this is a bug - but I have not seen nor heard of any forthcoming fix. */ - - sigemptyset (&block); - sigaddset (&block, SIGCHLD); - save = errno; - if (sigprocmask (SIG_BLOCK, &block, &omask) < 0) - { - if (errno == ENOSYS) - errno = save; - else - { - save = errno; - (void) sigaction (SIGINT, &intr, (struct sigaction *) NULL); - (void) sigaction (SIGQUIT, &quit, (struct sigaction *) NULL); - errno = save; - return -1; - } - } -# define UNBLOCK sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL) -#else -# define UNBLOCK 0 -#endif - - pid = fork (); - if (pid == (pid_t) 0) - { - /* Child side. */ - const char *new_argv[4]; - new_argv[0] = SHELL_NAME; - new_argv[1] = "-c"; - new_argv[2] = line; - new_argv[3] = NULL; - - /* Restore the signals. */ - (void) sigaction (SIGINT, &intr, (struct sigaction *) NULL); - (void) sigaction (SIGQUIT, &quit, (struct sigaction *) NULL); - (void) UNBLOCK; - - /* Exec the shell. */ - (void) execve (SHELL_PATH, (char *const *) new_argv, __environ); - _exit (127); - } - else if (pid < (pid_t) 0) - /* The fork failed. */ - status = -1; - else - /* Parent side. */ - { -#ifdef NO_WAITPID - pid_t child; - do - { - child = wait (&status); - if (child <= -1 && errno != EINTR) - { - status = -1; - break; - } - /* Note that pid cannot be <= -1 and therefore the loop continues - when wait returned with EINTR. */ - } - while (child != pid); -#else - int n; - - do - n = waitpid (pid, &status, 0); - while (n == -1 && errno == EINTR); - - if (n != pid) - status = -1; -#endif - } - - save = errno; - if ((sigaction (SIGINT, &intr, (struct sigaction *) NULL) | - sigaction (SIGQUIT, &quit, (struct sigaction *) NULL) | - UNBLOCK) != 0) - { - if (errno == ENOSYS) - errno = save; - else - return -1; - } - - return status; -} -weak_alias (__libc_system, system) |