Added `init_daemon()`.

Which actually initiallizes, and starts the daemon.

If `change_dir` is true, it will change the working
directory to `path`, or the root directory if `path`
is NULL.

1 files changed, 33 insertions, 0 deletions

diff --git a/pullreqd.c b/pullreqd.c
index e783aa6..cb6d680 100644
--- a/pullreqd.c
+++ b/pullreqd.c
@@ -29,3 +29,36 @@ void child_handler(int sig_num) {
 void hangup_handler(int sig_num) {
 	signal(SIGHUP, hangup_handler);
 }
+
+void init_daemon(int change_dir, char *path) {
+	/* Fork the parent. */
+	pid_t pid = fork_proc();
+
+	/* Exit if the child process isn't the session leader. */
+	if (setsid() < 0) {
+		exit(EXIT_FAILURE);
+	}
+
+	/* Catch, ignore, and/or handle signals. */
+	signal(SIGCHLD, child_handler);
+	signal(SIGHUP, hangup_handler);
+
+	/* Fork again. */
+	pid = fork_proc();
+
+	/* Set new file permissions. */
+	umask(0);
+
+	/* If change_dir is true, change the working directory to path, or
+	 * the root directory if path isn't set.
+	 */
+	if (change_dir) {
+		chdir((!path) ? path : "/");
+	}
+
+	/* Close any open file descriptors. */
+	for (int i = sysconf(_SC_OPEN_MAX); i >= 0; close(i--));
+
+	/* Open the logfile. */
+	openlog("pullreqd", LOG_PID, LOG_DAEMON);
+}