123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081 |
- /*
- * Daemonize routine
- * Copyright (C) 1997, 1999 Kunihiro Ishiguro
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra 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, or (at your
- * option) any later version.
- *
- * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
- #include <zebra.h>
- #include <log.h>
- #ifndef HAVE_DAEMON
- /* Daemonize myself. */
- int
- daemon (int nochdir, int noclose)
- {
- pid_t pid;
- pid = fork ();
- /* In case of fork is error. */
- if (pid < 0)
- {
- zlog_err ("fork failed: %s", safe_strerror(errno));
- return -1;
- }
- /* In case of this is parent process. */
- if (pid != 0)
- exit (0);
- /* Become session leader and get pid. */
- pid = setsid();
- if (pid == -1)
- {
- zlog_err ("setsid failed: %s", safe_strerror(errno));
- return -1;
- }
- /* Change directory to root. */
- if (! nochdir)
- chdir ("/");
- /* File descriptor close. */
- if (! noclose)
- {
- int fd;
- fd = open ("/dev/null", O_RDWR, 0);
- if (fd != -1)
- {
- dup2 (fd, STDIN_FILENO);
- dup2 (fd, STDOUT_FILENO);
- dup2 (fd, STDERR_FILENO);
- if (fd > 2)
- close (fd);
- }
- }
- umask (0027);
- return 0;
- }
- #endif /* HAVE_DAEMON */
|