+static
+void print_error_causes(void)
+{
+ const bt_error *error = bt_current_thread_take_error();
+ int64_t i;
+ GString *folded = NULL;
+ unsigned int columns;
+
+ if (!error || bt_error_get_cause_count(error) == 0) {
+ fprintf(stderr, "%s%sUnknown command-line error.%s\n",
+ bt_common_color_bold(), bt_common_color_fg_red(),
+ bt_common_color_reset());
+ goto end;
+ }
+
+ /* Try to get terminal width to fold the error cause messages */
+ if (bt_common_get_term_size(&columns, NULL) < 0) {
+ /* Width not found: default to 80 */
+ columns = 80;
+ }
+
+ /*
+ * This helps visually separate the error causes from the last
+ * logging statement.
+ */
+ fprintf(stderr, "\n");
+
+ /* Reverse order: deepest (root) cause printed at the end */
+ for (i = bt_error_get_cause_count(error) - 1; i >= 0; i--) {
+ const bt_error_cause *cause =
+ bt_error_borrow_cause_by_index(error, (uint64_t) i);
+ const char *prefix_fmt =
+ i == bt_error_get_cause_count(error) - 1 ?
+ "%s%sERROR%s: " : "%s%sCAUSED BY%s ";
+
+ /* Print prefix */
+ fprintf(stderr, prefix_fmt,
+ bt_common_color_bold(), bt_common_color_fg_red(),
+ bt_common_color_reset());
+
+ /* Print actor name */
+ fprintf(stderr, "[");
+ switch (bt_error_cause_get_actor_type(cause)) {
+ case BT_ERROR_CAUSE_ACTOR_TYPE_UNKNOWN:
+ fprintf(stderr, "%s%s%s",
+ bt_common_color_bold(),
+ bt_error_cause_get_module_name(cause),
+ bt_common_color_reset());
+ break;
+ case BT_ERROR_CAUSE_ACTOR_TYPE_COMPONENT:
+ fprintf(stderr, "%s%s%s: ",
+ bt_common_color_bold(),
+ bt_error_cause_component_actor_get_component_name(cause),
+ bt_common_color_reset());
+ print_plugin_comp_cls_opt(stderr,
+ bt_error_cause_component_actor_get_plugin_name(cause),
+ bt_error_cause_component_actor_get_component_class_name(cause),
+ bt_error_cause_component_actor_get_component_class_type(cause));
+ break;
+ case BT_ERROR_CAUSE_ACTOR_TYPE_COMPONENT_CLASS:
+ print_plugin_comp_cls_opt(stderr,
+ bt_error_cause_component_class_actor_get_plugin_name(cause),
+ bt_error_cause_component_class_actor_get_component_class_name(cause),
+ bt_error_cause_component_class_actor_get_component_class_type(cause));
+ break;
+ case BT_ERROR_CAUSE_ACTOR_TYPE_MESSAGE_ITERATOR:
+ fprintf(stderr, "%s%s%s (%s%s%s): ",
+ bt_common_color_bold(),
+ bt_error_cause_message_iterator_actor_get_component_name(cause),
+ bt_common_color_reset(),
+ bt_common_color_bold(),
+ bt_error_cause_message_iterator_actor_get_component_output_port_name(cause),
+ bt_common_color_reset());
+ print_plugin_comp_cls_opt(stderr,
+ bt_error_cause_message_iterator_actor_get_plugin_name(cause),
+ bt_error_cause_message_iterator_actor_get_component_class_name(cause),
+ bt_error_cause_message_iterator_actor_get_component_class_type(cause));
+ break;
+ default:
+ abort();
+ }
+
+ /* Print file name and line number */
+ fprintf(stderr, "] (%s%s%s%s:%s%" PRIu64 "%s)\n",
+ bt_common_color_bold(),
+ bt_common_color_fg_magenta(),
+ bt_error_cause_get_file_name(cause),
+ bt_common_color_reset(),
+ bt_common_color_fg_green(),
+ bt_error_cause_get_line_number(cause),
+ bt_common_color_reset());
+
+ /* Print message */
+ folded = bt_common_fold(bt_error_cause_get_message(cause),
+ columns, 2);
+ if (!folded) {
+ BT_LOGE_STR("Could not fold string.");
+ fprintf(stderr, "%s\n",
+ bt_error_cause_get_message(cause));
+ continue;
+ }
+
+ fprintf(stderr, "%s\n", folded->str);
+ g_string_free(folded, TRUE);
+ folded = NULL;
+ }
+
+end:
+ if (folded) {
+ g_string_free(folded, TRUE);
+ }
+
+ if (error) {
+ bt_error_release(error);
+ }
+}
+