diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/system.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/system.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/system.c b/nptl/sysdeps/unix/sysv/linux/system.c deleted file mode 100644 index 638967e2cb..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/system.c +++ /dev/null @@ -1,209 +0,0 @@ -/* Copyright (C) 1991-99,2000,02 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 <errno.h> -#include <signal.h> -#include <stddef.h> -#include <stdlib.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/wait.h> -#include <bits/libc-lock.h> -#include <nptl/pthreadP.h> -#include <tls.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. */ - - -#ifdef _LIBC_REENTRANT -static struct sigaction intr, quit; -static int sa_refcntr; -__libc_lock_define_initialized (static, lock); - -# define DO_LOCK() __libc_lock_lock (lock) -# define DO_UNLOCK() __libc_lock_unlock (lock) -# define INIT_LOCK() ({ __libc_lock_init (lock); sa_refcntr = 0; }) -# define ADD_REF() sa_refcntr++ -# define SUB_REF() --sa_refcntr -#else -# define DO_LOCK() -# define DO_UNLOCK() -# define INIT_LOCK() -# define ADD_REF() (void) 0 -# define SUB_REF() 0 -#endif - - -/* Execute LINE as a shell command, returning its status. */ -static int -do_system (const char *line) -{ - int status, save; - pid_t pid; - struct sigaction sa; -#ifndef _LIBC_REENTRANT - struct sigaction intr, quit; -#endif -#ifndef WAITPID_CANNOT_BLOCK_SIGCHLD - sigset_t block, omask; -#endif - - sa.sa_handler = SIG_IGN; - sa.sa_flags = 0; - __sigemptyset (&sa.sa_mask); - - DO_LOCK (); - if (ADD_REF () == 0) - { - if (__sigaction (SIGINT, &sa, &intr) < 0) - { - SUB_REF (); - DO_UNLOCK (); - return -1; - } - if (__sigaction (SIGQUIT, &sa, &quit) < 0) - { - save = errno; - goto out_restore_sigint; - } - } - DO_UNLOCK (); - - __sigemptyset (&block); - __sigaddset (&block, SIGCHLD); - save = errno; - if (__sigprocmask (SIG_BLOCK, &block, &omask) < 0) - { - if (errno == ENOSYS) - __set_errno (save); - else - { - save = errno; - DO_LOCK (); - if (SUB_REF () == 0) - { - (void) __sigaction (SIGQUIT, &quit, (struct sigaction *) NULL); - out_restore_sigint: - (void) __sigaction (SIGINT, &intr, (struct sigaction *) NULL); - } - DO_UNLOCK (); - __set_errno (save); - return -1; - } - } - - 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) __sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL); - INIT_LOCK (); - - /* 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 - if (TEMP_FAILURE_RETRY (__waitpid (pid, &status, 0)) != pid) - status = -1; -#endif - } - - save = errno; - DO_LOCK (); - if ((SUB_REF () == 0 - && (__sigaction (SIGINT, &intr, (struct sigaction *) NULL) - | __sigaction (SIGQUIT, &quit, (struct sigaction *) NULL)) != 0) - || __sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL) != 0) - { -#ifndef _LIBC - /* glibc cannot be used on systems without waitpid. */ - if (errno == ENOSYS) - __set_errno (save); - else -#endif - status = -1; - } - DO_UNLOCK (); - - return status; -} - - -int -__libc_system (const char *line) -{ - if (line == NULL) - /* Check that we have a command processor available. It might - not be available after a chroot(), for example. */ - return do_system ("exit 0") == 0; - -#ifndef NOT_IN_libc - if (__builtin_expect (THREAD_GETMEM (THREAD_SELF, - header.data.multiple_threads) == 0, 1)) - return do_system (line); - - /* XXX We have to install a cancellation handler to kill the child - process. */ - int oldtype = LIBC_CANCEL_ASYNC (); -#endif - - int result = do_system (line); - -#ifndef NOT_IN_libc - LIBC_CANCEL_RESET (oldtype); -#endif - - return result; -} -weak_alias (__libc_system, system) |