use unistd.h daemon function

src/daemonize.c

@@ -48,7 +48,7 @@ void close_lock_file()
     remove(LOCK_FILE);
 }
 
-void daemonize(){
+void kamathvasudev_daemonize(){
     int pid;
     int i;
     char str[10];
@@ -85,3 +85,34 @@ void daemonize(){
 
     atexit(close_lock_file);
 }
+
+void daemonize()
+{
+    pid_t pid;
+    char str[10];
+
+    /*
+     * use unistd.h function
+     *   - do change to root directory
+     *   - close std streams
+     */
+    daemon(1, 0);
+
+    /*
+     * Double fork method
+     */
+    pid = fork();
+    if(pid < 0) exit(1);
+    if(pid > 0) exit(0);
+
+    umask(022);
+
+    lfp = open(LOCK_FILE,O_RDWR|O_CREAT,0640);
+    if(lfp < 0) { log_signal_message("daemond is allready running !\n");exit(1); }
+    if(lockf(lfp,F_TLOCK,0) < 0) { log_signal_message("daemond is allready running\n");exit(1); }
+
+    sprintf(str,"%d\n",getpid());
+    write(lfp,str,strlen(str));
+
+    atexit(close_lock_file);
+}

tmp/daemond.log

@@ -1 +1,2 @@
 process 11096 signal 15 trapped
+process 16565 signal 15 trapped