From 6859b0b9b381d279aec5f7fa6764985302762e14 Mon Sep 17 00:00:00 2001
From: Thomas Ries <tries@gmx.net>
Date: Wed, 28 Nov 2007 20:51:45 +0000
Subject: [PATCH] Fix: Detach from controlling TTY if daemonized

---
 ChangeLog     |  1 +
 src/siproxd.c | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index acd1d4f..9cea0d6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 0.6.1
 =====
+  28-Nov-2007:  - Fix: Detach from controlling TTY if daemonized
   22-Nov-2007:  - Working on code that that will allow siproxd to use
                   separate interfaces in its "in front of NAT routes" setup.
                   ( UA1[LAN0]--siproxd--LAN1--NAT--Internet--UA2 )
diff --git a/src/siproxd.c b/src/siproxd.c
index 896be55..2d284fe 100644
--- a/src/siproxd.c
+++ b/src/siproxd.c
@@ -25,6 +25,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <fcntl.h>
 #include <signal.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -215,6 +216,23 @@ int main (int argc, char *argv[])
       if (fork()!=0) exit(0);
 
       log_set_stderr(0);
+
+      /* detach STDIN/OUT/ERR file */
+      i=open("/dev/null", O_RDWR);
+      close(STDIN_FILENO);
+      close(STDOUT_FILENO);
+      close(STDERR_FILENO);
+      if (dup2(i, STDIN_FILENO) <0) {
+         WARN("detaching STDIN failed: %s",strerror(errno));
+      }
+      if (dup2(i, STDOUT_FILENO) <0) {
+         WARN("detaching STDOUT failed: %s",strerror(errno));
+      }
+      if (dup2(i, STDERR_FILENO) <0) {
+         WARN("detaching STDERR failed: %s",strerror(errno));
+      }
+      close(i);
+
       INFO("daemonized, pid=%i", getpid());
    }