From: Pierre Habouzit <madcoder@debian.org>
Date: Wed, 29 Aug 2007 19:48:18 +0000 (+0200)
Subject: Add daemon_detach, and use it.
X-Git-Url: http://git.madism.org/?p=apps%2Fpfixtools.git;a=commitdiff_plain;h=45211afd2fe62b361a3062a306c7305fa85479bc

Add daemon_detach, and use it.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
---

diff --git a/daemon.c b/daemon.c
index c3aac5f..392dccb 100644
--- a/daemon.c
+++ b/daemon.c
@@ -127,3 +127,25 @@ int accept_nonblock(int fd)
 
     return sock;
 }
+
+int daemon_detach(void)
+{
+    pid_t pid;
+
+    close(STDIN_FILENO);
+    close(STDOUT_FILENO);
+    close(STDERR_FILENO);
+
+    open("/dev/null", O_RDWR);
+    open("/dev/null", O_RDWR);
+    open("/dev/null", O_RDWR);
+
+    pid = fork();
+    if (pid < 0)
+        return -1;
+    if (pid)
+        exit(0);
+
+    setsid();
+    return 0;
+}
diff --git a/daemon.h b/daemon.h
index 2fec199..e1b458f 100644
--- a/daemon.h
+++ b/daemon.h
@@ -39,4 +39,6 @@
 int tcp_listen_nonblock(const struct sockaddr *addr, socklen_t len);
 int accept_nonblock(int fd);
 
+int daemon_detach(void);
+
 #endif
diff --git a/srsd.c b/srsd.c
index 467c2f2..b28b024 100644
--- a/srsd.c
+++ b/srsd.c
@@ -408,5 +408,9 @@ int main(int argc, char *argv[])
         return EXIT_FAILURE;
     }
 
+    if (daemon_detach() < 0) {
+        syslog(LOG_CRIT, "unable to fork");
+        return EXIT_FAILURE;
+    }
     return main_loop(srs, argv[optind], port_enc, port_dec);
 }