From e49fe14705f78ba5a865ca4efd6ee53c78eeb253 Mon Sep 17 00:00:00 2001
From: Felix Janda <felix.janda@posteo.de>
Date: Sat, 10 Aug 2013 20:18:18 +0200
Subject: Add daemonize function to lib for klogd and syslogd

---
 lib/pending.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'lib/pending.c')

diff --git a/lib/pending.c b/lib/pending.c
index fad1c656..79b9c91c 100644
--- a/lib/pending.c
+++ b/lib/pending.c
@@ -102,3 +102,19 @@ char *xastrcat (char *x, char *y) {
   if (!x) error_exit ("xastrcat");
   return x;
 }
+
+void daemonize(void)
+{
+  int fd = open("/dev/null", O_RDWR);
+  if (fd < 0) fd = xcreate("/", O_RDONLY, 0666);
+
+  pid_t pid = fork();
+  if (pid < 0) perror_exit("DAEMON: failed to fork");
+  if (pid) exit(EXIT_SUCCESS);
+
+  setsid();
+  dup2(fd, 0);
+  dup2(fd, 1);
+  dup2(fd, 2);
+  if (fd > 2) close(fd);
+}
-- 
cgit v1.2.3