Handling also SIGTERM to shutdown gracefully

Author: baranyaib90

src/main.c

@@ -66,9 +66,9 @@ static int hostname_from_uri(const char* uri,
   return 1;
 }
 
-static void sigint_cb(struct ev_loop *loop,
-                      ev_signal __attribute__((__unused__)) *w,
-                      int __attribute__((__unused__)) revents) {
+static void signal_shutdown_cb(struct ev_loop *loop,
+                               ev_signal __attribute__((__unused__)) *w,
+                               int __attribute__((__unused__)) revents) {
   ILOG("Shutting down gracefully. To force exit, send signal again.");
   ev_break(loop, EVBREAK_ALL);
 }
@@ -268,9 +268,14 @@ int main(int argc, char *argv[]) {
 
   ev_signal sigint;
   // NOLINTNEXTLINE(clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling)
-  ev_signal_init(&sigint, sigint_cb, SIGINT);
+  ev_signal_init(&sigint, signal_shutdown_cb, SIGINT);
   ev_signal_start(loop, &sigint);
 
+  ev_signal sigterm;
+  // NOLINTNEXTLINE(clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling)
+  ev_signal_init(&sigterm, signal_shutdown_cb, SIGTERM);
+  ev_signal_start(loop, &sigterm);
+
   logging_flush_init(loop);
 
   dns_poller_t dns_poller;
@@ -298,6 +303,7 @@ int main(int argc, char *argv[]) {
   curl_slist_free_all(app.resolv);
 
   logging_flush_cleanup(loop);
+  ev_signal_stop(loop, &sigterm);
   ev_signal_stop(loop, &sigint);
   ev_signal_stop(loop, &sigpipe);
   dns_server_stop(&dns_server);