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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright 2003 Ximian, Inc. (www.ximian.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "camel-process.h"
pid_t
camel_process_fork (const char *path, char **argv, int *infd, int *outfd, int *errfd, CamelException *ex)
{
int errnosav, fd[6], i;
pid_t pid;
for (i = 0; i < 6; i++)
fds[i] = -1;
for (i = 0; i < 6; i += 2) {
if (pipe (fd + i) == -1) {
errnosav = errno;
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Failed to create pipe to '%s': %s"),
argv[0], strerror (errno));
for (i = 0; i < 6; i++) {
if (fd[i] == -1)
break;
close (fd[i]);
}
errno = errnosav;
return -1;
}
}
if (!(pid = fork ())) {
/* child process */
int maxfd, nullfd = -1;
if (!outfd || !errfd)
nullfd = open ("/dev/null", O_WRONLY);
if (dup2 (fd[0], STDIN_FILENO) == -1)
_exit (255);
if (dup2 (outfd ? fd[3] : nullfd, STDOUT_FILENO) == -1)
_exit (255);
if (dup2 (errfd ? fd[5] : nullfd, STDERR_FILENO) == -1)
_exit (255);
setsid ();
if ((maxfd = sysconf (_SC_OPEN_MAX)) > 0) {
for (i = 3; i < maxfd; i++)
fcntl (i, F_SETFD, FD_CLOEXEC);
}
execv (path, argv);
_exit (255);
} else if (pid == -1) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Failed to create create child process '%s': %s"),
argv[0], strerror (errno));
return -1;
}
/* parent process */
close (fd[0]);
close (fd[3]);
close (fd[5]);
if (infd)
*infd = fd[1];
else
close (fd[1]);
if (outfd)
*outfd = fd[2];
else
close (fd[2]);
if (errfd)
*errfd = fd[4];
else
close (fd[4]);
return pid;
}
int
camel_process_wait (pid_t pid)
{
sigset_t mask, omask;
int status;
pid_t r;
sigemptyset (&mask);
sigaddset (&mask, SIGALRM);
sigprocmask (SIG_BLOCK, &mask, &omask);
alarm (1);
r = waitpid (pid, &status, 0);
alarm (0);
sigprocmask (SIG_SETMASK, &omask, NULL);
if (r == (pid_t) -1 && errno == EINTR) {
kill (pid, SIGTERM);
sleep (1);
r = waitpid (pid, &status, WNOHANG);
if (r == (pid_t) 0) {
kill (pid, SIGKILL);
sleep (1);
r = waitpid (pid, &status, WNOHANG);
}
}
if (r != (pid_t) -1 && WIFEXITED (status))
return WEXITSTATUS (status);
else
return -1;
}
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