Daemonise.c
From Organic Design wiki
// [[[[http://www.organicdesign.co.nz/peerd|peerd]]]] - nodal p2p wiki daemon
// This article and all its includes are licenced under LGPL
// GPL: [[[[http://www.gnu.org/copyleft/lesser.html]]]]
// SRC: [[[[http://www.organicdesign.co.nz/daemonise.c]]]]
// included in [[[[http://www.organicdesign.co.nz/category:peerd/files/C|peerd]]]][[[[http://www.organicdesign.co.nz/peerd.c|/peerd.c]]]]
int peerdInit();
// ----------------------------------------------------------------------------------------- //
// daemonise.c
int peerdInit() {
// Fork so parent can exit and return control to what invoked it
pid_t pid = fork();
if (pid > 0) exit(EXIT_SUCCESS);
if (pid < 0) {
logAdd("daemonise: First fork() failed!");
exit(EXIT_FAILURE);
}
// Become a new session leader with no controlling term
if (setsid() < 0) {
logAdd("daemonise: setsid() failed!");
exit(EXIT_FAILURE);
}
// Fork again to be a non-session-leader which can't gain a controlling term
pid = fork();
if (pid > 0) exit(EXIT_SUCCESS);
if (pid < 0) {
logAdd("daemonise: second fork() failed!");
exit(EXIT_FAILURE);
}
errno = 0;
// Should be /home/lc(peer)
chdir("/home/peerd");
// Don't inherit any file perms mask
umask(0);
//close(STDIN_FILENO);
//close(STDOUT_FILENO);
//close(STDERR_FILENO);
return errno;
}