-#ifndef HAVE_DAEMON
-/*
- Replacement for the daemon() function.
-
- The daemon() function is for programs wishing to detach themselves
- from the controlling terminal and run in the background as system
- daemons.
-
- Unless the argument nochdir is non-zero, daemon() changes the
- current working directory to the root (``/'').
-
- Unless the argument noclose is non-zero, daemon() will redirect
- standard input, standard output and standard error to /dev/null.
-*/
-int daemon(int nochdir, int noclose) {
-#ifdef HAVE_FORK
- pid_t pid;
- int fd;
-
- pid = fork();
-
- /* Check if forking failed */
- if(pid < 0) {
- perror("fork");
- exit(-1);
- }
-
- /* If we are the parent, terminate */
- if(pid)
- exit(0);
-
- /* Detach by becoming the new process group leader */
- if(setsid() < 0) {
- perror("setsid");
- return -1;
- }
-
- /* Change working directory to the root (to avoid keeping mount
- points busy) */
- if(!nochdir) {
- chdir("/");
- }
-
- /* Redirect stdin/out/err to /dev/null */
- if(!noclose) {
- fd = open("/dev/null", O_RDWR);
-
- if(fd < 0) {
- perror("opening /dev/null");
- return -1;
- } else {
- dup2(fd, 0);
- dup2(fd, 1);
- dup2(fd, 2);
- }
- }
-
- return 0;
-#else
- return -1;
-#endif
-}
-#endif
-