Allow daemon mode

src/common/capwap.c

@@ -160,3 +160,41 @@ void* capwap_clone(void* buffer, int buffersize) {
 
 	return memcpy(bufferclone, buffer, buffersize);
 }
+
+/* */
+void capwap_daemon(void) {
+	int fd;
+	pid_t pid;
+
+	/* Fork off the parent process */
+	pid = fork();
+	if (pid < 0) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	} else if (pid > 0) {
+		capwap_exit(CAPWAP_SUCCESSFUL);
+	}
+
+	/* Change the file mode mask */
+	umask(0);
+
+	/* Create a new SID for the child process */
+	if (setsid() < 0) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	}
+
+	/* Change the current working directory */
+	if ((chdir("/")) < 0) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	}
+
+	/* Redirect the standard file descriptors to /dev/null */
+	fd = open("/dev/null", 0);
+	if (fd == -1) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	}
+
+	dup2(fd, STDIN_FILENO);
+	dup2(fd, STDOUT_FILENO);
+	dup2(fd, STDERR_FILENO);
+	close(fd);
+}