From: Michael Tremer <michael.tremer@ipfire.org>
Date: Thu, 23 Oct 2025 09:29:37 +0000 (+0000)
Subject: sources: Terminate the daemon if no sources have been loaded
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e3dbb589ff2ca8b35325e4c08c95f78672468d6;p=telemetry.git

sources: Terminate the daemon if no sources have been loaded

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/daemon/daemon.c b/src/daemon/daemon.c
index bf3d12b..4bc1943 100644
--- a/src/daemon/daemon.c
+++ b/src/daemon/daemon.c
@@ -92,7 +92,7 @@ static int td_daemon_init(sd_event_source* source, void* data) {
 	return 0;
 }
 
-static int td_daemon_exit(sd_event_source* source, void* data) {
+static int td_daemon_on_exit(sd_event_source* source, void* data) {
 	td_daemon* self = data;
 
 	DEBUG(self->ctx, "Cleaning up daemon...\n");
@@ -210,7 +210,7 @@ static int td_daemon_setup_loop(td_daemon* self) {
 
 	// Cleanup when the event loop exits
 	r = sd_event_add_exit(self->loop, &self->events.exit,
-			td_daemon_exit, self);
+			td_daemon_on_exit, self);
 	if (r < 0) {
 		ERROR(self->ctx, "Failed to register daemon exit: %s\n", strerror(-r));
 		return r;
@@ -381,6 +381,10 @@ ERROR:
 	return 1;
 }
 
+int td_daemon_exit(td_daemon* self, int rc) {
+	return sd_event_exit(self->loop, rc);
+}
+
 int td_daemon_submit_metrics(td_daemon* self, td_metrics* metrics) {
 	return td_queue_submit_metrics(self->queue, metrics);
 }
diff --git a/src/daemon/daemon.h b/src/daemon/daemon.h
index 5610c5f..a34e712 100644
--- a/src/daemon/daemon.h
+++ b/src/daemon/daemon.h
@@ -44,6 +44,7 @@ td_sources* td_daemon_get_sources(td_daemon* self);
 td_graphs* td_daemon_get_graphs(td_daemon* self);
 
 int td_daemon_run(td_daemon* self);
+int td_daemon_exit(td_daemon* self, int rc);
 
 int td_daemon_submit_metrics(td_daemon* self, td_metrics* metrics);
 
diff --git a/src/daemon/sources.c b/src/daemon/sources.c
index da920ee..9e3c8fe 100644
--- a/src/daemon/sources.c
+++ b/src/daemon/sources.c
@@ -139,6 +139,16 @@ static int td_sources_init(td_sources* self, char** enabled_sources) {
 		source = NULL;
 	}
 
+	// Abort if no sources have been enabled
+	if (!self->num_sources) {
+		ERROR(self->ctx, "No sources have been enabled\n");
+
+		// Terminate the daemon
+		return td_daemon_exit(self->daemon, -ENOTSUP);
+	}
+
+	DEBUG(self->ctx, "%d source(s) have been enabled\n", self->num_sources);
+
 	return 0;
 
 ERROR: