From 9ce31ec4d8ef8bdf35dff65463744a4da648228d Mon Sep 17 00:00:00 2001
From: "Nicholas J. Kain" <nicholas@kain.us>
Date: Fri, 12 Nov 2010 19:50:04 -0500
Subject: [PATCH] Make background() idempotent in a cleaner way.

---
 ndhc/ndhc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ndhc/ndhc.c b/ndhc/ndhc.c
index c40b7e4..075dc0b 100644
--- a/ndhc/ndhc.c
+++ b/ndhc/ndhc.c
@@ -188,11 +188,12 @@ static void signal_handler(int sig)
 
 static void background(void)
 {
-    if (daemon(0, 0) == -1) {
+    static char called;
+    if (!called && daemon(0, 0) == -1) {
         perror("fork");
         exit(EXIT_SUCCESS);
     }
-    client_config.foreground = 1; /* Do not fork again. */
+    called = 1;  /* Do not fork again. */
 }
 
 static void handle_timeout(void)