Auth notifications for unknown peers

contrib/peer-approver/notification-listener.c

@@ -22,6 +22,7 @@
 static struct nl_sock *sk = NULL;
 static char **cb_argv;
 static int cb_argc;
+static bool running_cb = false;
 
 static int cleanup_and_exit(int ret)
 {
@@ -32,7 +33,8 @@ static int cleanup_and_exit(int ret)
 
 static void signal_handler(int sig)
 {
-	cleanup_and_exit(EXIT_SUCCESS);
+	if (!running_cb)
+		cleanup_and_exit(EXIT_SUCCESS);
 }
 
 static inline void encode_base64(char dest[static 4], const uint8_t src[static 3])
@@ -127,8 +129,11 @@ static int run_callback(char *ifname, char *pubkey, char *endpoint_ip, bool adva
 	new_argv[cb_argc - 2] = endpoint_ip;
 	new_argv[cb_argc - 1] = (advanced_security ? "on\0" : "off\0");
 	new_argv[cb_argc] = NULL;
-	//prerr("Calling ")
+
+	running_cb = true;
 	int ret = execv(cb_argv[1], new_argv);
+	running_cb = false;
+
 	free(new_argv);
 	return ret;
 }