/* Creation of subprocesses, communicating via pipes.
- Copyright (C) 2001-2004, 2006-2008 Free Software Foundation, Inc.
+ Copyright (C) 2001-2004, 2006-2009 Free Software Foundation, Inc.
Written by Bruno Haible <haible@clisp.cons.org>, 2001.
This program is free software: you can redistribute it and/or modify
#else
/* Unix API. */
-# if HAVE_POSIX_SPAWN
-# include <spawn.h>
-# else
-# if HAVE_VFORK_H
-# include <vfork.h>
-# endif
-# endif
+# include <spawn.h>
#endif
-#ifndef STDIN_FILENO
-# define STDIN_FILENO 0
-#endif
-#ifndef STDOUT_FILENO
-# define STDOUT_FILENO 1
-#endif
-#ifndef STDERR_FILENO
-# define STDERR_FILENO 2
-#endif
-
/* The results of open() in this file are not used with fchdir,
therefore save some unnecessary work in fchdir.c. */
#undef open
copy of the environment block - ignoring the effects of putenv() and
[un]setenv(). */
{
- child = spawnvpe (P_NOWAIT, prog_path, prog_argv, environ);
+ child = spawnvpe (P_NOWAIT, prog_path, (const char **) prog_argv,
+ (const char **) environ);
if (child < 0 && errno == ENOEXEC)
{
/* prog is not an native executable. Try to execute it as a
shell script. Note that prepare_spawn() has already prepended
a hidden element "sh.exe" to prog_argv. */
--prog_argv;
- child = spawnvpe (P_NOWAIT, prog_argv[0], prog_argv, environ);
+ child = spawnvpe (P_NOWAIT, prog_argv[0], (const char **) prog_argv,
+ (const char **) environ);
}
}
if (stdinfd >= 0)
/* Unix API. */
int ifd[2];
int ofd[2];
-# if HAVE_POSIX_SPAWN
sigset_t blocked_signals;
posix_spawn_file_actions_t actions;
bool actions_allocated;
bool attrs_allocated;
int err;
pid_t child;
-# else
- int child;
-# endif
if (pipe_stdout)
if (pipe (ifd) < 0
*
*/
-# if HAVE_POSIX_SPAWN
if (slave_process)
{
sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
posix_spawn_file_actions_destroy (&actions);
if (attrs_allocated)
posix_spawnattr_destroy (&attrs);
-# else
- if (slave_process)
- block_fatal_signals ();
- /* Use vfork() instead of fork() for efficiency. */
- if ((child = vfork ()) == 0)
- {
- /* Child process code. */
- int nulloutfd;
- int stdinfd;
- int stdoutfd;
-
- if ((!pipe_stdin || dup2 (ofd[0], STDIN_FILENO) >= 0)
- && (!pipe_stdout || dup2 (ifd[1], STDOUT_FILENO) >= 0)
- && (!pipe_stdin || close (ofd[0]) >= 0)
- && (!pipe_stdout || close (ifd[1]) >= 0)
- && (!pipe_stdin || close (ofd[1]) >= 0)
- && (!pipe_stdout || close (ifd[0]) >= 0)
- && (!null_stderr
- || ((nulloutfd = open ("/dev/null", O_RDWR, 0)) >= 0
- && (nulloutfd == STDERR_FILENO
- || (dup2 (nulloutfd, STDERR_FILENO) >= 0
- && close (nulloutfd) >= 0))))
- && (pipe_stdin
- || prog_stdin == NULL
- || ((stdinfd = open (prog_stdin, O_RDONLY, 0)) >= 0
- && (stdinfd == STDIN_FILENO
- || (dup2 (stdinfd, STDIN_FILENO) >= 0
- && close (stdinfd) >= 0))))
- && (pipe_stdout
- || prog_stdout == NULL
- || ((stdoutfd = open (prog_stdout, O_WRONLY, 0)) >= 0
- && (stdoutfd == STDOUT_FILENO
- || (dup2 (stdoutfd, STDOUT_FILENO) >= 0
- && close (stdoutfd) >= 0))))
- && (!slave_process || (unblock_fatal_signals (), true)))
- execvp (prog_path, prog_argv);
- _exit (127);
- }
- if (child == -1)
- {
- if (slave_process)
- unblock_fatal_signals ();
- if (exit_on_error || !null_stderr)
- error (exit_on_error ? EXIT_FAILURE : 0, errno,
- _("%s subprocess failed"), progname);
- if (pipe_stdout)
- {
- close (ifd[0]);
- close (ifd[1]);
- }
- if (pipe_stdin)
- {
- close (ofd[0]);
- close (ofd[1]);
- }
- return -1;
- }
-# endif
if (slave_process)
{
register_slave_subprocess (child);