do all logging on stderr

src/client/client.c

@@ -77,7 +77,7 @@ static void on_ToClientAuth(__attribute__((unused)) DragonnetPeer *peer, ToClien
 	pthread_mutex_lock(&client_auth.mtx);
 	if (pkt->success) {
 		client_auth.state = AUTH_SUCCESS;
-		printf("[access] authenticated successfully\n");
+		fprintf(stderr, "[access] authenticated successfully\n");
 	} else {
 		client_auth.state = AUTH_INIT;
 	}
@@ -142,7 +142,7 @@ int main(int argc, char **argv)
 		return EXIT_FAILURE;
 	}
 
-	printf("[access] connected to %s\n", client->address);
+	fprintf(stderr, "[access] connected to %s\n", client->address);
 
 	client->on_disconnect = &on_disconnect;
 	client->on_recv                                                  = (void *) &on_recv;

src/client/client_auth.c

@@ -19,7 +19,7 @@ void client_auth_run(char *name)
 {
 	pthread_mutex_lock(&client_auth.mtx);
 
-	printf("[access] authenticating as %s...\n", name);
+	fprintf(stderr, "[access] authenticating as %s...\n", name);
 
 	dragonnet_peer_send_ToServerAuth(client, &(ToServerAuth) {
 		.name = name,

src/client/client_inventory.c

@@ -138,7 +138,7 @@ static void menu_slot_click(GUIElement *element, bool right)
 	if (menu.selected) {
 		InventoryLocation *other = menu.selected->user;
 
-		printf("[info] inventory swap (%s %zu) with (%s %zu)\n",
+		fprintf(stderr, "[info] inventory swap (%s %zu) with (%s %zu)\n",
 			list_name(loc->list), (size_t) loc->slot, list_name(other->list), (size_t) other->slot);
 
 		dragonnet_peer_send_ToServerInventorySwap(client, &(ToServerInventorySwap) {

src/common/config.c

@@ -11,7 +11,7 @@ void config_read(const char *path, ConfigEntry *entries, size_t num_entries)
 	if (!f)
 		return;
 
-	printf("[info] reading config from %s\n", path);
+	fprintf(stderr, "[info] reading config from %s\n", path);
 
 	while (!feof(f)) {
 		char key[BUFSIZ];

src/server/server.c

@@ -105,7 +105,7 @@ int main(int argc, char **argv)
 		fclose(addrfile);
 	}
 
-	printf("[info] listening on %s\n", server->address);
+	fprintf(stderr, "[info] listening on %s\n", server->address);
 
 	server->on_connect = &server_player_add;
 	server->on_disconnect = &server_player_remove;
@@ -128,7 +128,7 @@ int main(int argc, char **argv)
 
 	flag_slp(&interrupt);
 
-	printf("[info] shutting down\n");
+	fprintf(stderr, "[info] shutting down\n");
 	dragonnet_listener_close(server);
 
 	server_player_deinit();

src/server/server_player.c

@@ -223,7 +223,7 @@ void server_player_add(DragonnetPeer *peer)
 	for (size_t i = 0; i < INV_SIZE_MAIN; i++) item_stack_initialize(&player->inventory.main[i]);
 	pthread_mutex_init(&player->mtx_inv, NULL);
 
-	printf("[access] connected %s\n", player->name);
+	fprintf(stderr, "[access] connected %s\n", player->name);
 	peer->user = refcount_grb(&player->rc);
 
 	// keep the search tree somewhat balanced by using random IDs
@@ -252,7 +252,7 @@ void server_player_remove(DragonnetPeer *peer)
 	// map_del returns false if it was canceled
 	// (we don't want disconnect messages for every player on server shutdown)
 	if (map_del(&players, &player->id, &cmp_player_id, &refcount_drp, NULL, NULL))
-		printf("[access] disconnected %s\n", player->name);
+		fprintf(stderr, "[access] disconnected %s\n", player->name);
 
 	if (player->auth && map_del(&players_named, player->name, &cmp_player_name, &refcount_drp, NULL, NULL)) {
 		pthread_rwlock_rdlock(&player->lock_pos);
@@ -291,7 +291,7 @@ bool server_player_auth(ServerPlayer *player, char *name)
 
 	bool success = map_add(&players_named, player->name, &player->rc, &cmp_player_name, &refcount_inc);
 
-	printf("[access] authentication %s: %s -> %s\n", success ? "success" : "failure", old_name, player->name);
+	fprintf(stderr, "[access] authentication %s: %s -> %s\n", success ? "success" : "failure", old_name, player->name);
 
 	// since this is recv thread, we don't need lock_peer
 	dragonnet_peer_send_ToClientAuth(player->peer, &(ToClientAuth) {

src/server/server_terrain.c

@@ -304,7 +304,7 @@ static void update_percentage()
 
 	if (percentage > last_percentage) {
 		last_percentage = percentage;
-		printf("[verbose] preparing spawn... %d%%\n", percentage);
+		fprintf(stderr, "[verbose] preparing spawn... %d%%\n", percentage);
 	}
 
 }

src/server/tree_physics.c

@@ -327,7 +327,7 @@ void tree_physics_check(v3s32 center)
 			// run depth search
 			if (!check_tree(root, &positions, &chunks)) {
 				// a return value of false means a deadlock occured (should be very rare)
-				printf("[verbose] tree_physics detected deadlock (this not an issue, but should not happen frequently)\n");
+				fprintf(stderr, "[verbose] tree_physics detected deadlock (this not an issue, but should not happen frequently)\n");
 
 				// sleep for 50ms to hopefully resolve the conflict
 				nanosleep(&(struct timespec) {0, 50e6}, NULL);

subprojects/dragonnet.wrap

@@ -1,5 +1,5 @@
 [wrap-git]
 url = https://github.com/dragonblocks/dragonnet
-revision = 3b0298c3a99973bdf7836c7df52793293e644bfe
+revision = 9cbece535e532204aed752d3e596675e0202c325
 clone-recursive = true
 depth = 1