Auth notifications for unknown peers

contrib/peer-approver/notification-listener.c

@@ -22,7 +22,7 @@
 static struct nl_sock *sk = NULL;
 static char **cb_argv;
 static int cb_argc;
-static bool running_cb = false;
+//static bool running_cb = false;
 
 static int cleanup_and_exit(int ret)
 {
@@ -33,7 +33,7 @@ static int cleanup_and_exit(int ret)
 
 static void signal_handler(int sig)
 {
-	if (!running_cb)
+	//if (!running_cb)
 		cleanup_and_exit(EXIT_SUCCESS);
 }
 
@@ -130,9 +130,20 @@ static int run_callback(char *ifname, char *pubkey, char *endpoint_ip, bool adva
 	new_argv[cb_argc - 1] = (advanced_security ? "on\0" : "off\0");
 	new_argv[cb_argc] = NULL;
 
-	running_cb = true;
-	int ret = execv(cb_argv[1], new_argv);
-	running_cb = false;
+	//running_cb = true;
+
+	int child_pid = fork(), ret;
+	if (child_pid < 0) {
+		prerr("failed to spawn child process: %d\n", child_pid);
+		return child_pid;
+	} else if (child_pid == 0) {
+		execv(cb_argv[1], new_argv);
+		exit(0);
+	} else {
+		waitpid(child_pid, &ret, 0);
+	}
+
+	//running_cb = false;
 
 	free(new_argv);
 	return ret;