Make bt_graph_add_*_listener() function return a listener ID

[babeltrace.git] / cli / babeltrace.c

diff --git a/cli/babeltrace.c b/cli/babeltrace.c
index 3d37d4e01010d941def39933ab403f28aa1ff7eb..f63150a273632ff6d753592cd2ba854143339856 100644 (file)
--- a/cli/babeltrace.c
+++ b/cli/babeltrace.c
@@ -1494,25 +1494,29 @@ int cmd_run_ctx_init(struct cmd_run_ctx *ctx, struct bt_config *cfg)
        the_graph = ctx->graph;
        ret = bt_graph_add_port_added_listener(ctx->graph,
                graph_port_added_listener, ctx);
-       if (ret) {
+       if (ret < 0) {
+               BT_LOGE_STR("Cannot add \"port added\" listener to graph.");
                goto error;
        }
 
        ret = bt_graph_add_port_removed_listener(ctx->graph,
                graph_port_removed_listener, ctx);
-       if (ret) {
+       if (ret < 0) {
+               BT_LOGE_STR("Cannot add \"port removed\" listener to graph.");
                goto error;
        }
 
        ret = bt_graph_add_ports_connected_listener(ctx->graph,
                graph_ports_connected_listener, ctx);
-       if (ret) {
+       if (ret < 0) {
+               BT_LOGE_STR("Cannot add \"ports connected\" listener to graph.");
                goto error;
        }
 
        ret = bt_graph_add_ports_disconnected_listener(ctx->graph,
                graph_ports_disconnected_listener, ctx);
-       if (ret) {
+       if (ret < 0) {
+               BT_LOGE_STR("Cannot add \"ports disconnected\" listener to graph.");
                goto error;
        }