Move to kernel style SPDX license identifiers
[babeltrace.git] / src / cli / babeltrace2.c
index 396673d0d63ed996c7b9b601ad8d3c96c9511fa1..c4b7c29fc1605bc67910bcbdb98608c9c872a309 100644 (file)
@@ -1,25 +1,7 @@
 /*
- * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
- *
- * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
+ * SPDX-License-Identifier: MIT
  *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
  */
 
 #define BT_LOG_TAG "CLI"
@@ -27,9 +9,10 @@
 
 #include <babeltrace2/babeltrace.h>
 #include "common/common.h"
+#include "string-format/format-error.h"
+#include "string-format/format-plugin-comp-cls-name.h"
 #include <unistd.h>
 #include <stdlib.h>
-#include <popt.h>
 #include <string.h>
 #include <stdio.h>
 #include <glib.h>
 #include "babeltrace2-cfg.h"
 #include "babeltrace2-cfg-cli-args.h"
 #include "babeltrace2-cfg-cli-args-default.h"
+#include "babeltrace2-log-level.h"
+#include "babeltrace2-plugins.h"
+#include "babeltrace2-query.h"
 
 #define ENV_BABELTRACE_WARN_COMMAND_NAME_DIRECTORY_CLASH "BABELTRACE_CLI_WARN_COMMAND_NAME_DIRECTORY_CLASH"
-#define ENV_BABELTRACE_CLI_LOG_LEVEL "BABELTRACE_CLI_LOG_LEVEL"
 #define NSEC_PER_SEC   1000000000LL
 
-/*
- * Known environment variable names for the log levels of the project's
- * modules.
- */
-static const char* log_level_env_var_names[] = {
-       "BABELTRACE_PLUGIN_CTF_METADATA_LOG_LEVEL",
-       "BABELTRACE_PYTHON_BT2_LOG_LEVEL",
-       NULL,
+enum bt_cmd_status {
+       BT_CMD_STATUS_OK            = 0,
+       BT_CMD_STATUS_ERROR         = -1,
+       BT_CMD_STATUS_INTERRUPTED   = -2,
 };
 
-/* Application's processing graph (weak) */
-static bt_graph *the_graph;
-static bt_query_executor *the_query_executor;
-static bool canceled = false;
+static
+const char *bt_cmd_status_string(enum bt_cmd_status cmd_status)
+{
+       switch (cmd_status) {
+       case BT_CMD_STATUS_OK:
+               return "OK";
+       case BT_CMD_STATUS_ERROR:
+               return "ERROR";
+       case BT_CMD_STATUS_INTERRUPTED:
+               return "INTERRUPTED";
+       default:
+               bt_common_abort();
+       }
+}
 
-GPtrArray *loaded_plugins;
+/* Application's interrupter (owned by this) */
+static bt_interrupter *the_interrupter;
 
 #ifdef __MINGW32__
 
@@ -67,12 +59,10 @@ GPtrArray *loaded_plugins;
 
 static
 BOOL WINAPI signal_handler(DWORD signal) {
-       if (the_graph) {
-               bt_graph_cancel(the_graph);
+       if (the_interrupter) {
+               bt_interrupter_set(the_interrupter);
        }
 
-       canceled = true;
-
        return TRUE;
 }
 
@@ -93,15 +83,9 @@ void signal_handler(int signum)
                return;
        }
 
-       if (the_graph) {
-               bt_graph_cancel(the_graph);
-       }
-
-       if (the_query_executor) {
-               bt_query_executor_cancel(the_query_executor);
+       if (the_interrupter) {
+               bt_interrupter_set(the_interrupter);
        }
-
-       canceled = true;
 }
 
 static
@@ -121,159 +105,13 @@ void set_signal_handler(void)
 
 #endif /* __MINGW32__ */
 
-static
-void init_static_data(void)
-{
-       loaded_plugins = g_ptr_array_new_with_free_func(
-               (GDestroyNotify) bt_object_put_ref);
-}
-
-static
-void fini_static_data(void)
-{
-       g_ptr_array_free(loaded_plugins, TRUE);
-}
-
-static
-int create_the_query_executor(void)
-{
-       int ret = 0;
-
-       the_query_executor = bt_query_executor_create();
-       if (!the_query_executor) {
-               BT_LOGE_STR("Cannot create a query executor.");
-               ret = -1;
-       }
-
-       return ret;
-}
-
-static
-void destroy_the_query_executor(void)
-{
-       BT_QUERY_EXECUTOR_PUT_REF_AND_RESET(the_query_executor);
-}
-
 static
 int query(struct bt_config *cfg, const bt_component_class *comp_cls,
                const char *obj, const bt_value *params,
                const bt_value **user_result, const char **fail_reason)
 {
-       const bt_value *result = NULL;
-       bt_query_executor_status status;
-       *fail_reason = "unknown error";
-       int ret = 0;
-
-       BT_ASSERT(fail_reason);
-       BT_ASSERT(user_result);
-       ret = create_the_query_executor();
-       if (ret) {
-               /* create_the_query_executor() logs errors */
-               goto end;
-       }
-
-       if (canceled) {
-               BT_LOGI("Canceled by user before executing the query: "
-                       "comp-cls-addr=%p, comp-cls-name=\"%s\", "
-                       "query-obj=\"%s\"", comp_cls,
-                       bt_component_class_get_name(comp_cls), obj);
-               *fail_reason = "canceled by user";
-               goto error;
-       }
-
-       while (true) {
-               status = bt_query_executor_query(the_query_executor,
-                       comp_cls, obj, params, cfg->log_level, &result);
-               switch (status) {
-               case BT_QUERY_EXECUTOR_STATUS_OK:
-                       goto ok;
-               case BT_QUERY_EXECUTOR_STATUS_AGAIN:
-               {
-                       const uint64_t sleep_time_us = 100000;
-
-                       /* Wait 100 ms and retry */
-                       BT_LOGD("Got BT_QUERY_EXECUTOR_STATUS_AGAIN: sleeping: "
-                               "time-us=%" PRIu64, sleep_time_us);
-
-                       if (usleep(sleep_time_us)) {
-                               if (bt_query_executor_is_canceled(the_query_executor)) {
-                                       BT_LOGI("Query was canceled by user: "
-                                               "comp-cls-addr=%p, comp-cls-name=\"%s\", "
-                                               "query-obj=\"%s\"", comp_cls,
-                                               bt_component_class_get_name(comp_cls),
-                                               obj);
-                                       *fail_reason = "canceled by user";
-                                       goto error;
-                               }
-                       }
-
-                       continue;
-               }
-               case BT_QUERY_EXECUTOR_STATUS_CANCELED:
-                       *fail_reason = "canceled by user";
-                       goto error;
-               case BT_QUERY_EXECUTOR_STATUS_ERROR:
-                       goto error;
-               case BT_QUERY_EXECUTOR_STATUS_INVALID_OBJECT:
-                       *fail_reason = "invalid or unknown query object";
-                       goto error;
-               case BT_QUERY_EXECUTOR_STATUS_INVALID_PARAMS:
-                       *fail_reason = "invalid query parameters";
-                       goto error;
-               case BT_QUERY_EXECUTOR_STATUS_UNSUPPORTED:
-                       *fail_reason = "unsupported action";
-                       goto error;
-               case BT_QUERY_EXECUTOR_STATUS_NOMEM:
-                       *fail_reason = "not enough memory";
-                       goto error;
-               default:
-                       BT_LOGF("Unknown query status: status=%d", status);
-                       abort();
-               }
-       }
-
-ok:
-       *user_result = result;
-       result = NULL;
-       goto end;
-
-error:
-       ret = -1;
-
-end:
-       destroy_the_query_executor();
-       bt_value_put_ref(result);
-       return ret;
-}
-
-static
-const bt_plugin *find_plugin(const char *name)
-{
-       int i;
-       const bt_plugin *plugin = NULL;
-
-       BT_ASSERT(name);
-       BT_LOGI("Finding plugin: name=\"%s\"", name);
-
-       for (i = 0; i < loaded_plugins->len; i++) {
-               plugin = g_ptr_array_index(loaded_plugins, i);
-
-               if (strcmp(name, bt_plugin_get_name(plugin)) == 0) {
-                       break;
-               }
-
-               plugin = NULL;
-       }
-
-       if (plugin) {
-               BT_LOGI("Found plugin: name=\"%s\", plugin-addr=%p",
-                       name, plugin);
-       } else {
-               BT_LOGI("Cannot find plugin: name=\"%s\"", name);
-       }
-
-       bt_plugin_get_ref(plugin);
-       return plugin;
+       return cli_query(comp_cls, obj, params, cfg->log_level,
+               the_interrupter, user_result, fail_reason);
 }
 
 typedef const void *(*plugin_borrow_comp_cls_func_t)(
@@ -290,14 +128,13 @@ const void *find_component_class_from_plugin(const char *plugin_name,
        BT_LOGI("Finding component class: plugin-name=\"%s\", "
                "comp-cls-name=\"%s\"", plugin_name, comp_class_name);
 
-       plugin = find_plugin(plugin_name);
+       plugin = borrow_loaded_plugin_by_name(plugin_name);
        if (!plugin) {
                goto end;
        }
 
        comp_class = plugin_borrow_comp_cls_func(plugin, comp_class_name);
        bt_object_get_ref(comp_class);
-       BT_PLUGIN_PUT_REF_AND_RESET(plugin);
 
 end:
        if (comp_class) {
@@ -360,7 +197,7 @@ const bt_component_class *find_component_class(const char *plugin_name,
                comp_cls = bt_component_class_sink_as_component_class_const(find_sink_component_class(plugin_name, comp_class_name));
                break;
        default:
-               abort();
+               bt_common_abort();
        }
 
        return comp_cls;
@@ -376,101 +213,60 @@ void print_indent(FILE *fp, size_t indent)
        }
 }
 
-static
-const char *component_type_str(bt_component_class_type type)
-{
-       switch (type) {
-       case BT_COMPONENT_CLASS_TYPE_SOURCE:
-               return "source";
-       case BT_COMPONENT_CLASS_TYPE_SINK:
-               return "sink";
-       case BT_COMPONENT_CLASS_TYPE_FILTER:
-               return "filter";
-       default:
-               return "(unknown)";
-       }
-}
-
-static
-void print_plugin_comp_cls_opt(FILE *fh, const char *plugin_name,
-               const char *comp_cls_name, bt_component_class_type type)
-{
-       GString *shell_plugin_name = NULL;
-       GString *shell_comp_cls_name = NULL;
-
-       shell_plugin_name = bt_common_shell_quote(plugin_name, false);
-       if (!shell_plugin_name) {
-               goto end;
-       }
-
-       shell_comp_cls_name = bt_common_shell_quote(comp_cls_name, false);
-       if (!shell_comp_cls_name) {
-               goto end;
-       }
-
-       fprintf(fh, "'%s%s%s%s.%s%s%s.%s%s%s'",
-               bt_common_color_bold(),
-               bt_common_color_fg_cyan(),
-               component_type_str(type),
-               bt_common_color_fg_default(),
-               bt_common_color_fg_blue(),
-               shell_plugin_name->str,
-               bt_common_color_fg_default(),
-               bt_common_color_fg_yellow(),
-               shell_comp_cls_name->str,
-               bt_common_color_reset());
-
-end:
-       if (shell_plugin_name) {
-               g_string_free(shell_plugin_name, TRUE);
-       }
-
-       if (shell_comp_cls_name) {
-               g_string_free(shell_comp_cls_name, TRUE);
-       }
-}
-
 static
 void print_value(FILE *, const bt_value *, size_t);
 
 static
 void print_value_rec(FILE *, const bt_value *, size_t);
 
-struct print_map_value_data {
-       size_t indent;
-       FILE *fp;
-};
-
 static
-bt_bool print_map_value(const char *key, const bt_value *object,
-               void *data)
+void print_map_value(const char *key, const bt_value *object, FILE *fp,
+               size_t indent)
 {
-       struct print_map_value_data *print_map_value_data = data;
-
-       print_indent(print_map_value_data->fp, print_map_value_data->indent);
-       fprintf(print_map_value_data->fp, "%s: ", key);
+       print_indent(fp, indent);
+       fprintf(fp, "%s: ", key);
        BT_ASSERT(object);
 
        if (bt_value_is_array(object) &&
                        bt_value_array_is_empty(object)) {
-               fprintf(print_map_value_data->fp, "[ ]\n");
-               return true;
+               fprintf(fp, "[ ]\n");
+               goto end;
        }
 
        if (bt_value_is_map(object) &&
                        bt_value_map_is_empty(object)) {
-               fprintf(print_map_value_data->fp, "{ }\n");
-               return true;
+               fprintf(fp, "{ }\n");
+               goto end;
        }
 
        if (bt_value_is_array(object) ||
                        bt_value_is_map(object)) {
-               fprintf(print_map_value_data->fp, "\n");
+               fprintf(fp, "\n");
        }
 
-       print_value_rec(print_map_value_data->fp, object,
-               print_map_value_data->indent + 2);
-       return BT_TRUE;
+       print_value_rec(fp, object, indent + 2);
+
+end:
+       return;
+}
+
+static
+bt_value_map_foreach_entry_const_func_status collect_map_keys(
+               const char *key, const bt_value *object, void *data)
+{
+       GPtrArray *map_keys = data;
+
+       g_ptr_array_add(map_keys, (gpointer *) key);
+
+       return BT_VALUE_MAP_FOREACH_ENTRY_CONST_FUNC_STATUS_OK;
+}
+
+static
+gint g_ptr_array_sort_strings(gconstpointer a, gconstpointer b) {
+       const char *s1 = *((const char **) a);
+       const char *s2 = *((const char **) b);
+
+       return g_strcmp0(s1, s2);
 }
 
 static
@@ -481,12 +277,9 @@ void print_value_rec(FILE *fp, const bt_value *value, size_t indent)
        uint64_t uint_val;
        double dbl_val;
        const char *str_val;
-       int size;
-       int i;
+       GPtrArray *map_keys = NULL;
 
-       if (!value) {
-               return;
-       }
+       BT_ASSERT(value);
 
        switch (bt_value_get_type(value)) {
        case BT_VALUE_TYPE_NULL:
@@ -496,39 +289,37 @@ void print_value_rec(FILE *fp, const bt_value *value, size_t indent)
        case BT_VALUE_TYPE_BOOL:
                bool_val = bt_value_bool_get(value);
                fprintf(fp, "%s%s%s%s\n", bt_common_color_bold(),
-                       bt_common_color_fg_cyan(), bool_val ? "yes" : "no",
+                       bt_common_color_fg_bright_cyan(), bool_val ? "yes" : "no",
                        bt_common_color_reset());
                break;
        case BT_VALUE_TYPE_UNSIGNED_INTEGER:
-               uint_val = bt_value_unsigned_integer_get(value);
+               uint_val = bt_value_integer_unsigned_get(value);
                fprintf(fp, "%s%s%" PRIu64 "%s\n", bt_common_color_bold(),
-                       bt_common_color_fg_red(), uint_val,
+                       bt_common_color_fg_bright_red(), uint_val,
                        bt_common_color_reset());
                break;
        case BT_VALUE_TYPE_SIGNED_INTEGER:
-               int_val = bt_value_signed_integer_get(value);
+               int_val = bt_value_integer_signed_get(value);
                fprintf(fp, "%s%s%" PRId64 "%s\n", bt_common_color_bold(),
-                       bt_common_color_fg_red(), int_val,
+                       bt_common_color_fg_bright_red(), int_val,
                        bt_common_color_reset());
                break;
        case BT_VALUE_TYPE_REAL:
                dbl_val = bt_value_real_get(value);
                fprintf(fp, "%s%s%lf%s\n", bt_common_color_bold(),
-                       bt_common_color_fg_red(), dbl_val,
+                       bt_common_color_fg_bright_red(), dbl_val,
                        bt_common_color_reset());
                break;
        case BT_VALUE_TYPE_STRING:
                str_val = bt_value_string_get(value);
                fprintf(fp, "%s%s%s%s\n", bt_common_color_bold(),
-                       bt_common_color_fg_green(), str_val,
+                       bt_common_color_fg_bright_green(), str_val,
                        bt_common_color_reset());
                break;
        case BT_VALUE_TYPE_ARRAY:
-               size = bt_value_array_get_size(value);
-               if (size < 0) {
-                       goto error;
-               }
-
+       {
+               uint64_t i, size;
+               size = bt_value_array_get_length(value);
                if (size == 0) {
                        print_indent(fp, indent);
                        fprintf(fp, "[ ]\n");
@@ -540,9 +331,6 @@ void print_value_rec(FILE *fp, const bt_value *value, size_t indent)
                                bt_value_array_borrow_element_by_index_const(
                                        value, i);
 
-                       if (!element) {
-                               goto error;
-                       }
                        print_indent(fp, indent);
                        fprintf(fp, "- ");
 
@@ -566,12 +354,11 @@ void print_value_rec(FILE *fp, const bt_value *value, size_t indent)
                        print_value_rec(fp, element, indent + 2);
                }
                break;
+       }
        case BT_VALUE_TYPE_MAP:
        {
-               struct print_map_value_data data = {
-                       .indent = indent,
-                       .fp = fp,
-               };
+               guint i;
+               bt_value_map_foreach_entry_const_status foreach_status;
 
                if (bt_value_map_is_empty(value)) {
                        print_indent(fp, indent);
@@ -579,17 +366,48 @@ void print_value_rec(FILE *fp, const bt_value *value, size_t indent)
                        break;
                }
 
-               bt_value_map_foreach_entry_const(value, print_map_value, &data);
+               map_keys = g_ptr_array_new();
+               if (!map_keys) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Failed to allocated on GPtrArray.");
+                       goto end;
+               }
+
+               /*
+                * We want to print the map entries in a stable order.  Collect
+                * all the map's keys in a GPtrArray, sort it, then print the
+                * entries in that order.
+                */
+               foreach_status = bt_value_map_foreach_entry_const(value,
+                       collect_map_keys, map_keys);
+               if (foreach_status != BT_VALUE_MAP_FOREACH_ENTRY_CONST_STATUS_OK) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Failed to iterator on map value.");
+                       goto end;
+               }
+
+               g_ptr_array_sort(map_keys, g_ptr_array_sort_strings);
+
+               for (i = 0; i < map_keys->len; i++) {
+                       const char *map_key = g_ptr_array_index(map_keys, i);
+                       const bt_value *map_value;
+
+                       map_value = bt_value_map_borrow_entry_value_const(value, map_key);
+                       BT_ASSERT(map_value);
+
+                       print_map_value(map_key, map_value, fp, indent);
+               }
+
                break;
        }
        default:
-               abort();
+               bt_common_abort();
        }
-       return;
 
-error:
-       BT_LOGE("Error printing value of type %s.",
-               bt_common_value_type_string(bt_value_get_type(value)));
+       goto end;
+
+end:
+       if (map_keys) {
+               g_ptr_array_free(map_keys, TRUE);
+       }
 }
 
 static
@@ -605,11 +423,16 @@ void print_value(FILE *fp, const bt_value *value, size_t indent)
 static
 void print_bt_config_component(struct bt_config_component *bt_config_component)
 {
-       fprintf(stderr, "    ");
-       print_plugin_comp_cls_opt(stderr, bt_config_component->plugin_name->str,
+       gchar *comp_cls_str;
+
+       comp_cls_str = format_plugin_comp_cls_opt(
+               bt_config_component->plugin_name->str,
                bt_config_component->comp_cls_name->str,
-               bt_config_component->type);
-       fprintf(stderr, ":\n");
+               bt_config_component->type,
+               BT_COMMON_COLOR_WHEN_AUTO);
+       BT_ASSERT(comp_cls_str);
+
+       fprintf(stderr, "    %s:\n", comp_cls_str);
 
        if (bt_config_component->instance_name->len > 0) {
                fprintf(stderr, "      Name: %s\n",
@@ -618,6 +441,8 @@ void print_bt_config_component(struct bt_config_component *bt_config_component)
 
        fprintf(stderr, "      Parameters:\n");
        print_value(stderr, bt_config_component->params, 8);
+
+       g_free(comp_cls_str);
 }
 
 static
@@ -718,8 +543,6 @@ void print_cfg(struct bt_config *cfg)
        }
 
        BT_LOGI_STR("CLI configuration:");
-       BT_LOGI("  Debug mode: %s\n", cfg->debug ? "yes" : "no");
-       BT_LOGI("  Verbose mode: %s\n", cfg->verbose ? "yes" : "no");
 
        switch (cfg->command) {
        case BT_CONFIG_COMMAND_RUN:
@@ -741,133 +564,8 @@ void print_cfg(struct bt_config *cfg)
                print_cfg_print_lttng_live_sessions(cfg);
                break;
        default:
-               abort();
-       }
-}
-
-static
-void add_to_loaded_plugins(const bt_plugin_set *plugin_set)
-{
-       int64_t i;
-       int64_t count;
-
-       count = bt_plugin_set_get_plugin_count(plugin_set);
-       BT_ASSERT(count >= 0);
-
-       for (i = 0; i < count; i++) {
-               const bt_plugin *plugin =
-                       bt_plugin_set_borrow_plugin_by_index_const(plugin_set, i);
-               const bt_plugin *loaded_plugin =
-                       find_plugin(bt_plugin_get_name(plugin));
-
-               BT_ASSERT(plugin);
-
-               if (loaded_plugin) {
-                       BT_LOGI("Not using plugin: another one already exists with the same name: "
-                               "plugin-name=\"%s\", plugin-path=\"%s\", "
-                               "existing-plugin-path=\"%s\"",
-                               bt_plugin_get_name(plugin),
-                               bt_plugin_get_path(plugin),
-                               bt_plugin_get_path(loaded_plugin));
-                       bt_plugin_put_ref(loaded_plugin);
-               } else {
-                       /* Add to global array. */
-                       BT_LOGD("Adding plugin to loaded plugins: plugin-path=\"%s\"",
-                               bt_plugin_get_name(plugin));
-                       bt_plugin_get_ref(plugin);
-                       g_ptr_array_add(loaded_plugins, (void *) plugin);
-               }
-       }
-}
-
-static
-int load_dynamic_plugins(const bt_value *plugin_paths)
-{
-       int nr_paths, i, ret = 0;
-
-       nr_paths = bt_value_array_get_size(plugin_paths);
-       if (nr_paths < 0) {
-               BT_LOGE_STR("Cannot load dynamic plugins: no plugin path.");
-               ret = -1;
-               goto end;
-       }
-
-       BT_LOGI_STR("Loading dynamic plugins.");
-
-       for (i = 0; i < nr_paths; i++) {
-               const bt_value *plugin_path_value = NULL;
-               const char *plugin_path;
-               const bt_plugin_set *plugin_set;
-
-               plugin_path_value =
-                       bt_value_array_borrow_element_by_index_const(
-                               plugin_paths, i);
-               plugin_path = bt_value_string_get(plugin_path_value);
-
-               /*
-                * Skip this if the directory does not exist because
-                * bt_plugin_find_all_from_dir() expects an existing
-                * directory.
-                */
-               if (!g_file_test(plugin_path, G_FILE_TEST_IS_DIR)) {
-                       BT_LOGI("Skipping nonexistent directory path: "
-                               "path=\"%s\"", plugin_path);
-                       continue;
-               }
-
-               plugin_set = bt_plugin_find_all_from_dir(plugin_path, false);
-               if (!plugin_set) {
-                       BT_LOGI("Unable to load dynamic plugins from directory: "
-                               "path=\"%s\"", plugin_path);
-                       continue;
-               }
-
-               add_to_loaded_plugins(plugin_set);
-               bt_plugin_set_put_ref(plugin_set);
+               bt_common_abort();
        }
-end:
-       return ret;
-}
-
-static
-int load_static_plugins(void)
-{
-       int ret = 0;
-       const bt_plugin_set *plugin_set;
-
-       BT_LOGI("Loading static plugins.");
-       plugin_set = bt_plugin_find_all_from_static();
-       if (!plugin_set) {
-               BT_LOGE("Unable to load static plugins.");
-               ret = -1;
-               goto end;
-       }
-
-       add_to_loaded_plugins(plugin_set);
-       bt_plugin_set_put_ref(plugin_set);
-end:
-       return ret;
-}
-
-static
-int load_all_plugins(const bt_value *plugin_paths)
-{
-       int ret = 0;
-
-       if (load_dynamic_plugins(plugin_paths)) {
-               ret = -1;
-               goto end;
-       }
-
-       if (load_static_plugins()) {
-               ret = -1;
-               goto end;
-       }
-
-       BT_LOGI("Loaded all plugins: count=%u", loaded_plugins->len);
-
-end:
-       return ret;
 }
 
 static
@@ -890,7 +588,7 @@ void print_plugin_info(const bt_plugin *plugin)
        version_avail = bt_plugin_get_version(plugin, &major, &minor,
                &patch, &extra);
        printf("%s%s%s%s:\n", bt_common_color_bold(),
-               bt_common_color_fg_blue(), plugin_name,
+               bt_common_color_fg_bright_blue(), plugin_name,
                bt_common_color_reset());
        if (path) {
                printf("  %sPath%s: %s\n", bt_common_color_bold(),
@@ -922,9 +620,10 @@ void print_plugin_info(const bt_plugin *plugin)
 }
 
 static
-int cmd_query(struct bt_config *cfg)
+enum bt_cmd_status cmd_query(struct bt_config *cfg)
 {
        int ret = 0;
+       enum bt_cmd_status cmd_status;
        const bt_component_class *comp_cls = NULL;
        const bt_value *results = NULL;
        const char *fail_reason = NULL;
@@ -934,62 +633,41 @@ int cmd_query(struct bt_config *cfg)
                cfg->cmd_data.query.cfg_component->comp_cls_name->str,
                cfg->cmd_data.query.cfg_component->type);
        if (!comp_cls) {
-               BT_LOGE("Cannot find component class: plugin-name=\"%s\", "
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find component class: plugin-name=\"%s\", "
                        "comp-cls-name=\"%s\", comp-cls-type=%d",
                        cfg->cmd_data.query.cfg_component->plugin_name->str,
                        cfg->cmd_data.query.cfg_component->comp_cls_name->str,
                        cfg->cmd_data.query.cfg_component->type);
-               fprintf(stderr, "%s%sCannot find component class %s",
-                       bt_common_color_bold(),
-                       bt_common_color_fg_red(),
-                       bt_common_color_reset());
-               print_plugin_comp_cls_opt(stderr,
-                       cfg->cmd_data.query.cfg_component->plugin_name->str,
-                       cfg->cmd_data.query.cfg_component->comp_cls_name->str,
-                       cfg->cmd_data.query.cfg_component->type);
-               fprintf(stderr, "\n");
-               ret = -1;
-               goto end;
+               goto error;
        }
 
        ret = query(cfg, comp_cls, cfg->cmd_data.query.object->str,
                cfg->cmd_data.query.cfg_component->params,
                &results, &fail_reason);
        if (ret) {
-               goto failed;
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Failed to query component class: %s: plugin-name=\"%s\", "
+                       "comp-cls-name=\"%s\", comp-cls-type=%d "
+                       "object=\"%s\"", fail_reason,
+                       cfg->cmd_data.query.cfg_component->plugin_name->str,
+                       cfg->cmd_data.query.cfg_component->comp_cls_name->str,
+                       cfg->cmd_data.query.cfg_component->type,
+                       cfg->cmd_data.query.object->str);
+               goto error;
        }
 
        print_value(stdout, results, 0);
+       cmd_status = BT_CMD_STATUS_OK;
        goto end;
 
-failed:
-       BT_LOGE("Failed to query component class: %s: plugin-name=\"%s\", "
-               "comp-cls-name=\"%s\", comp-cls-type=%d "
-               "object=\"%s\"", fail_reason,
-               cfg->cmd_data.query.cfg_component->plugin_name->str,
-               cfg->cmd_data.query.cfg_component->comp_cls_name->str,
-               cfg->cmd_data.query.cfg_component->type,
-               cfg->cmd_data.query.object->str);
-       fprintf(stderr, "%s%sFailed to query info to %s",
-               bt_common_color_bold(),
-               bt_common_color_fg_red(),
-               bt_common_color_reset());
-       print_plugin_comp_cls_opt(stderr,
-               cfg->cmd_data.query.cfg_component->plugin_name->str,
-               cfg->cmd_data.query.cfg_component->comp_cls_name->str,
-               cfg->cmd_data.query.cfg_component->type);
-       fprintf(stderr, "%s%s with object `%s`: %s%s\n",
-               bt_common_color_bold(),
-               bt_common_color_fg_red(),
-               cfg->cmd_data.query.object->str,
-               fail_reason,
-               bt_common_color_reset());
-       ret = -1;
+error:
+       cmd_status = BT_CMD_STATUS_ERROR;
 
 end:
        bt_component_class_put_ref(comp_cls);
        bt_value_put_ref(results);
-       return ret;
+       return cmd_status;
 }
 
 static
@@ -1004,9 +682,13 @@ void print_component_class_help(const char *plugin_name,
                bt_component_class_get_help(comp_cls);
        bt_component_class_type type =
                bt_component_class_get_type(comp_cls);
+       gchar *comp_cls_str;
 
-       print_plugin_comp_cls_opt(stdout, plugin_name, comp_class_name, type);
-       printf("\n");
+       comp_cls_str = format_plugin_comp_cls_opt(plugin_name, comp_class_name,
+               type, BT_COMMON_COLOR_WHEN_AUTO);
+       BT_ASSERT(comp_cls_str);
+
+       printf("%s\n", comp_cls_str);
        printf("  %sDescription%s: %s\n", bt_common_color_bold(),
                bt_common_color_reset(),
                comp_class_description ? comp_class_description : "(None)");
@@ -1014,26 +696,23 @@ void print_component_class_help(const char *plugin_name,
        if (comp_class_help) {
                printf("\n%s\n", comp_class_help);
        }
+
+       g_free(comp_cls_str);
 }
 
 static
-int cmd_help(struct bt_config *cfg)
+enum bt_cmd_status cmd_help(struct bt_config *cfg)
 {
-       int ret = 0;
+       enum bt_cmd_status cmd_status;
        const bt_plugin *plugin = NULL;
        const bt_component_class *needed_comp_cls = NULL;
 
-       plugin = find_plugin(cfg->cmd_data.help.cfg_component->plugin_name->str);
+       plugin = borrow_loaded_plugin_by_name(cfg->cmd_data.help.cfg_component->plugin_name->str);
        if (!plugin) {
-               BT_LOGE("Cannot find plugin: plugin-name=\"%s\"",
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find plugin: plugin-name=\"%s\"",
                        cfg->cmd_data.help.cfg_component->plugin_name->str);
-               fprintf(stderr, "%s%sCannot find plugin %s%s%s\n",
-                       bt_common_color_bold(), bt_common_color_fg_red(),
-                       bt_common_color_fg_blue(),
-                       cfg->cmd_data.help.cfg_component->plugin_name->str,
-                       bt_common_color_reset());
-               ret = -1;
-               goto end;
+               goto error;
        }
 
        print_plugin_info(plugin);
@@ -1052,6 +731,7 @@ int cmd_help(struct bt_config *cfg)
 
        if (strlen(cfg->cmd_data.help.cfg_component->comp_cls_name->str) == 0) {
                /* Plugin help only */
+               cmd_status = BT_CMD_STATUS_OK;
                goto end;
        }
 
@@ -1060,33 +740,28 @@ int cmd_help(struct bt_config *cfg)
                cfg->cmd_data.help.cfg_component->comp_cls_name->str,
                cfg->cmd_data.help.cfg_component->type);
        if (!needed_comp_cls) {
-               BT_LOGE("Cannot find component class: plugin-name=\"%s\", "
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find component class: plugin-name=\"%s\", "
                        "comp-cls-name=\"%s\", comp-cls-type=%d",
                        cfg->cmd_data.help.cfg_component->plugin_name->str,
                        cfg->cmd_data.help.cfg_component->comp_cls_name->str,
                        cfg->cmd_data.help.cfg_component->type);
-               fprintf(stderr, "\n%s%sCannot find component class %s",
-                       bt_common_color_bold(),
-                       bt_common_color_fg_red(),
-                       bt_common_color_reset());
-               print_plugin_comp_cls_opt(stderr,
-                       cfg->cmd_data.help.cfg_component->plugin_name->str,
-                       cfg->cmd_data.help.cfg_component->comp_cls_name->str,
-                       cfg->cmd_data.help.cfg_component->type);
-               fprintf(stderr, "\n");
-               ret = -1;
-               goto end;
+               goto error;
        }
 
        printf("\n");
        print_component_class_help(
                cfg->cmd_data.help.cfg_component->plugin_name->str,
                needed_comp_cls);
+       cmd_status = BT_CMD_STATUS_OK;
+       goto end;
+
+error:
+       cmd_status = BT_CMD_STATUS_ERROR;
 
 end:
        bt_component_class_put_ref(needed_comp_cls);
-       bt_plugin_put_ref(plugin);
-       return ret;
+       return cmd_status;
 }
 
 typedef void *(* plugin_borrow_comp_cls_by_index_func_t)(const bt_plugin *,
@@ -1094,12 +769,14 @@ typedef void *(* plugin_borrow_comp_cls_by_index_func_t)(const bt_plugin *,
 typedef const bt_component_class *(* spec_comp_cls_borrow_comp_cls_func_t)(
        void *);
 
+static
 void cmd_list_plugins_print_component_classes(const bt_plugin *plugin,
                const char *cc_type_name, uint64_t count,
                plugin_borrow_comp_cls_by_index_func_t borrow_comp_cls_by_index_func,
                spec_comp_cls_borrow_comp_cls_func_t spec_comp_cls_borrow_comp_cls_func)
 {
        uint64_t i;
+       gchar *comp_cls_str = NULL;
 
        if (count == 0) {
                printf("  %s%s component classes%s: (none)\n",
@@ -1125,10 +802,11 @@ void cmd_list_plugins_print_component_classes(const bt_plugin *plugin,
                bt_component_class_type type =
                        bt_component_class_get_type(comp_class);
 
-               printf("    ");
-               print_plugin_comp_cls_opt(stdout,
-                       bt_plugin_get_name(plugin), comp_class_name,
-                       type);
+               g_free(comp_cls_str);
+               comp_cls_str = format_plugin_comp_cls_opt(
+                       bt_plugin_get_name(plugin), comp_class_name, type,
+                       BT_COMMON_COLOR_WHEN_AUTO);
+               printf("    %s", comp_cls_str);
 
                if (comp_class_description) {
                        printf(": %s", comp_class_description);
@@ -1138,26 +816,25 @@ void cmd_list_plugins_print_component_classes(const bt_plugin *plugin,
        }
 
 end:
-       return;
+       g_free(comp_cls_str);
 }
 
 static
-int cmd_list_plugins(struct bt_config *cfg)
+enum bt_cmd_status cmd_list_plugins(struct bt_config *cfg)
 {
-       int ret = 0;
        int plugins_count, component_classes_count = 0, i;
 
        printf("From the following plugin paths:\n\n");
        print_value(stdout, cfg->plugin_paths, 2);
        printf("\n");
-       plugins_count = loaded_plugins->len;
+       plugins_count = get_loaded_plugins_count();
        if (plugins_count == 0) {
                printf("No plugins found.\n");
                goto end;
        }
 
        for (i = 0; i < plugins_count; i++) {
-               const bt_plugin *plugin = g_ptr_array_index(loaded_plugins, i);
+               const bt_plugin *plugin = borrow_loaded_plugin_by_index(i);
 
                component_classes_count +=
                        bt_plugin_get_source_component_class_count(plugin) +
@@ -1174,7 +851,7 @@ int cmd_list_plugins(struct bt_config *cfg)
                bt_common_color_reset());
 
        for (i = 0; i < plugins_count; i++) {
-               const bt_plugin *plugin = g_ptr_array_index(loaded_plugins, i);
+               const bt_plugin *plugin = borrow_loaded_plugin_by_index(i);
 
                printf("\n");
                print_plugin_info(plugin);
@@ -1199,13 +876,14 @@ int cmd_list_plugins(struct bt_config *cfg)
        }
 
 end:
-       return ret;
+       return BT_CMD_STATUS_OK;
 }
 
 static
-int cmd_print_lttng_live_sessions(struct bt_config *cfg)
+enum bt_cmd_status cmd_print_lttng_live_sessions(struct bt_config *cfg)
 {
        int ret = 0;
+       enum bt_cmd_status cmd_status;
        const bt_component_class *comp_cls = NULL;
        const bt_value *results = NULL;
        bt_value *params = NULL;
@@ -1215,7 +893,7 @@ int cmd_print_lttng_live_sessions(struct bt_config *cfg)
        static const char * const comp_cls_name = "lttng-live";
        static const bt_component_class_type comp_cls_type =
                BT_COMPONENT_CLASS_TYPE_SOURCE;
-       int64_t array_size, i;
+       uint64_t array_size, i;
        const char *fail_reason = NULL;
        FILE *out_stream = stdout;
 
@@ -1223,17 +901,11 @@ int cmd_print_lttng_live_sessions(struct bt_config *cfg)
        comp_cls = find_component_class(plugin_name, comp_cls_name,
                comp_cls_type);
        if (!comp_cls) {
-               BT_LOGE("Cannot find component class: plugin-name=\"%s\", "
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find component class: plugin-name=\"%s\", "
                        "comp-cls-name=\"%s\", comp-cls-type=%d",
                        plugin_name, comp_cls_name,
                        BT_COMPONENT_CLASS_TYPE_SOURCE);
-               fprintf(stderr, "%s%sCannot find component class %s",
-                       bt_common_color_bold(),
-                       bt_common_color_fg_red(),
-                       bt_common_color_reset());
-               print_plugin_comp_cls_opt(stderr, plugin_name,
-                       comp_cls_name, comp_cls_type);
-               fprintf(stderr, "\n");
                goto error;
        }
 
@@ -1251,17 +923,16 @@ int cmd_print_lttng_live_sessions(struct bt_config *cfg)
        ret = query(cfg, comp_cls, "sessions", params,
                    &results, &fail_reason);
        if (ret) {
-               goto failed;
+               BT_CLI_LOGE_APPEND_CAUSE("Failed to query `sessions` object: %s",
+                       fail_reason);
+               goto error;
        }
 
        BT_ASSERT(results);
 
        if (!bt_value_is_array(results)) {
-               BT_LOGE_STR("Expecting an array for sessions query.");
-               fprintf(stderr, "%s%sUnexpected type returned by session query%s\n",
-                       bt_common_color_bold(),
-                       bt_common_color_fg_red(),
-                       bt_common_color_reset());
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Expecting an array for LTTng live `sessions` query.");
                goto error;
        }
 
@@ -1270,71 +941,65 @@ int cmd_print_lttng_live_sessions(struct bt_config *cfg)
                        fopen(cfg->cmd_data.print_lttng_live_sessions.output_path->str,
                                "w");
                if (!out_stream) {
-                       ret = -1;
                        BT_LOGE_ERRNO("Cannot open file for writing",
                                ": path=\"%s\"",
                                cfg->cmd_data.print_lttng_live_sessions.output_path->str);
-                       goto end;
+                       (void) BT_CURRENT_THREAD_ERROR_APPEND_CAUSE_FROM_UNKNOWN(
+                               "Babeltrace CLI",
+                               "Cannot open file for writing: path=\"%s\"",
+                               cfg->cmd_data.print_lttng_live_sessions.output_path->str);
+                       goto error;
                }
        }
 
-       array_size = bt_value_array_get_size(results);
+       array_size = bt_value_array_get_length(results);
        for (i = 0; i < array_size; i++) {
                const char *url_text;
                int64_t timer_us, streams, clients;
 
                map = bt_value_array_borrow_element_by_index_const(results, i);
-               if (!map) {
-                       BT_LOGE_STR("Unexpected empty array entry.");
-                       goto error;
-               }
                if (!bt_value_is_map(map)) {
-                       BT_LOGE_STR("Unexpected entry type.");
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected entry type.");
                        goto error;
                }
 
                v = bt_value_map_borrow_entry_value_const(map, "url");
                if (!v) {
-                       BT_LOGE_STR("Unexpected empty array \"url\" entry.");
+                       BT_CLI_LOGE_APPEND_CAUSE("Missing `url` entry.");
                        goto error;
                }
                url_text = bt_value_string_get(v);
                fprintf(out_stream, "%s", url_text);
                v = bt_value_map_borrow_entry_value_const(map, "timer-us");
                if (!v) {
-                       BT_LOGE_STR("Unexpected empty array \"timer-us\" entry.");
+                       BT_CLI_LOGE_APPEND_CAUSE("Missing `timer-us` entry.");
                        goto error;
                }
-               timer_us = bt_value_signed_integer_get(v);
+               timer_us = bt_value_integer_unsigned_get(v);
                fprintf(out_stream, " (timer = %" PRIu64 ", ", timer_us);
                v = bt_value_map_borrow_entry_value_const(map, "stream-count");
                if (!v) {
-                       BT_LOGE_STR("Unexpected empty array \"stream-count\" entry.");
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Missing `stream-count` entry.");
                        goto error;
                }
-               streams = bt_value_signed_integer_get(v);
+               streams = bt_value_integer_unsigned_get(v);
                fprintf(out_stream, "%" PRIu64 " stream(s), ", streams);
                v = bt_value_map_borrow_entry_value_const(map, "client-count");
                if (!v) {
-                       BT_LOGE_STR("Unexpected empty array \"client-count\" entry.");
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Missing `client-count` entry.");
                        goto error;
                }
-               clients = bt_value_signed_integer_get(v);
+               clients = bt_value_integer_unsigned_get(v);
                fprintf(out_stream, "%" PRIu64 " client(s) connected)\n", clients);
        }
 
+       cmd_status = BT_CMD_STATUS_OK;
        goto end;
 
-failed:
-       BT_LOGE("Failed to query for sessions: %s", fail_reason);
-       fprintf(stderr, "%s%sFailed to request sessions: %s%s\n",
-               bt_common_color_bold(),
-               bt_common_color_fg_red(),
-               fail_reason,
-               bt_common_color_reset());
-
 error:
-       ret = -1;
+       cmd_status = BT_CMD_STATUS_ERROR;
 
 end:
        bt_value_put_ref(results);
@@ -1351,13 +1016,14 @@ end:
                }
        }
 
-       return ret;
+       return cmd_status;
 }
 
 static
-int cmd_print_ctf_metadata(struct bt_config *cfg)
+enum bt_cmd_status cmd_print_ctf_metadata(struct bt_config *cfg)
 {
        int ret = 0;
+       enum bt_cmd_status cmd_status;
        const bt_component_class *comp_cls = NULL;
        const bt_value *results = NULL;
        bt_value *params = NULL;
@@ -1374,46 +1040,39 @@ int cmd_print_ctf_metadata(struct bt_config *cfg)
        comp_cls = find_component_class(plugin_name, comp_cls_name,
                comp_cls_type);
        if (!comp_cls) {
-               BT_LOGE("Cannot find component class: plugin-name=\"%s\", "
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find component class: plugin-name=\"%s\", "
                        "comp-cls-name=\"%s\", comp-cls-type=%d",
                        plugin_name, comp_cls_name,
                        BT_COMPONENT_CLASS_TYPE_SOURCE);
-               fprintf(stderr, "%s%sCannot find component class %s",
-                       bt_common_color_bold(),
-                       bt_common_color_fg_red(),
-                       bt_common_color_reset());
-               print_plugin_comp_cls_opt(stderr, plugin_name,
-                       comp_cls_name, comp_cls_type);
-               fprintf(stderr, "\n");
-               ret = -1;
-               goto end;
+               goto error;
        }
 
        params = bt_value_map_create();
        if (!params) {
-               ret = -1;
-               goto end;
+               goto error;
        }
 
        ret = bt_value_map_insert_string_entry(params, "path",
                cfg->cmd_data.print_ctf_metadata.path->str);
        if (ret) {
-               ret = -1;
-               goto end;
+               goto error;
        }
 
        ret = query(cfg, comp_cls, "metadata-info",
                params, &results, &fail_reason);
        if (ret) {
-               goto failed;
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Failed to query `metadata-info` object: %s", fail_reason);
+               goto error;
        }
 
        metadata_text_value = bt_value_map_borrow_entry_value_const(results,
-                                                                   "text");
+               "text");
        if (!metadata_text_value) {
-               BT_LOGE_STR("Cannot find `text` string value in the resulting metadata info object.");
-               ret = -1;
-               goto end;
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find `text` string value in the resulting metadata info object.");
+               goto error;
        }
 
        metadata_text = bt_value_string_get(metadata_text_value);
@@ -1423,34 +1082,31 @@ int cmd_print_ctf_metadata(struct bt_config *cfg)
                        fopen(cfg->cmd_data.print_ctf_metadata.output_path->str,
                                "w");
                if (!out_stream) {
-                       ret = -1;
                        BT_LOGE_ERRNO("Cannot open file for writing",
                                ": path=\"%s\"",
                                cfg->cmd_data.print_ctf_metadata.output_path->str);
-                       goto end;
+                       (void) BT_CURRENT_THREAD_ERROR_APPEND_CAUSE_FROM_UNKNOWN(
+                               "Babeltrace CLI",
+                               "Cannot open file for writing: path=\"%s\"",
+                               cfg->cmd_data.print_ctf_metadata.output_path->str);
+                       goto error;
                }
        }
 
        ret = fprintf(out_stream, "%s\n", metadata_text);
        if (ret < 0) {
-               BT_LOGE("Cannot write whole metadata text to output stream: "
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot write whole metadata text to output stream: "
                        "ret=%d", ret);
-               goto end;
+               goto error;
        }
 
-       ret = 0;
-
+       cmd_status = BT_CMD_STATUS_OK;
        goto end;
 
-failed:
-       ret = -1;
-       BT_LOGE("Failed to query for metadata info: %s", fail_reason);
-       fprintf(stderr, "%s%sFailed to request metadata info: %s%s\n",
-               bt_common_color_bold(),
-               bt_common_color_fg_red(),
-               fail_reason,
-               bt_common_color_reset());
-
+error:
+       cmd_status = BT_CMD_STATUS_ERROR;
+
 end:
        bt_value_put_ref(results);
        bt_value_put_ref(params);
@@ -1466,7 +1122,7 @@ end:
                }
        }
 
-       return ret;
+       return cmd_status;
 }
 
 struct port_id {
@@ -1496,8 +1152,8 @@ gboolean port_id_equal(gconstpointer v1, gconstpointer v2)
        const struct port_id *id1 = v1;
        const struct port_id *id2 = v2;
 
-       return !strcmp(id1->instance_name, id2->instance_name) &&
-               !strcmp(id1->port_name, id2->port_name);
+       return strcmp(id1->instance_name, id2->instance_name) == 0 &&
+               strcmp(id1->port_name, id2->port_name) == 0;
 }
 
 static
@@ -1607,7 +1263,8 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
        uint64_t i;
        input_port_count_func_t port_count_fn;
        borrow_input_port_by_index_func_t port_by_index_fn;
-       bt_graph_status status = BT_GRAPH_STATUS_ERROR;
+       bt_graph_connect_ports_status connect_ports_status =
+               BT_GRAPH_CONNECT_PORTS_STATUS_OK;
        bool insert_trimmer = false;
        bt_value *trimmer_params = NULL;
        char *intersection_begin = NULL;
@@ -1633,14 +1290,15 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
                range = (struct trace_range *) g_hash_table_lookup(
                        ctx->intersections, &port_id);
                if (range) {
-                       bt_value_status status;
+                       bt_value_map_insert_entry_status insert_status;
 
                        intersection_begin = s_from_ns(
                                range->intersection_range_begin_ns);
                        intersection_end = s_from_ns(
                                range->intersection_range_end_ns);
                        if (!intersection_begin || !intersection_end) {
-                               BT_LOGE_STR("Cannot create trimmer argument timestamp string.");
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Cannot create trimmer argument timestamp string.");
                                goto error;
                        }
 
@@ -1650,15 +1308,15 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
                                goto error;
                        }
 
-                       status = bt_value_map_insert_string_entry(
+                       insert_status = bt_value_map_insert_string_entry(
                                trimmer_params, "begin", intersection_begin);
-                       if (status != BT_VALUE_STATUS_OK) {
+                       if (insert_status < 0) {
                                goto error;
                        }
-                       status = bt_value_map_insert_string_entry(
+                       insert_status = bt_value_map_insert_string_entry(
                                trimmer_params,
                                "end", intersection_end);
-                       if (status != BT_VALUE_STATUS_OK) {
+                       if (insert_status < 0) {
                                goto error;
                        }
                }
@@ -1695,10 +1353,9 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
        }
 
        if (!downstream_comp) {
-               BT_LOGE("Cannot find downstream component:  comp-name=\"%s\", "
-                       "conn-arg=\"%s\"", cfg_conn->downstream_comp_name->str,
-                       cfg_conn->arg->str);
-               fprintf(stderr, "Cannot create connection: cannot find downstream component: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot find downstream component: "
+                       "comp-name=\"%s\", conn-arg=\"%s\"",
+                       cfg_conn->downstream_comp_name->str,
                        cfg_conn->arg->str);
                goto error;
        }
@@ -1752,7 +1409,7 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
                         * source and the trimmer.
                         */
                        char *trimmer_name = NULL;
-                       bt_graph_status graph_status;
+                       bt_graph_add_component_status add_comp_status;
 
                        ret = asprintf(&trimmer_name,
                                "stream-intersection-trimmer-%s",
@@ -1763,12 +1420,14 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
                        ret = 0;
 
                        ctx->connect_ports = false;
-                       graph_status = bt_graph_add_filter_component(
+                       add_comp_status = bt_graph_add_filter_component(
                                ctx->graph, trimmer_class, trimmer_name,
                                trimmer_params, ctx->cfg->log_level,
                                &trimmer);
+                       bt_component_filter_get_ref(trimmer);
                        free(trimmer_name);
-                       if (graph_status != BT_GRAPH_STATUS_OK) {
+                       if (add_comp_status !=
+                                       BT_GRAPH_ADD_COMPONENT_STATUS_OK) {
                                goto error;
                        }
                        BT_ASSERT(trimmer);
@@ -1799,36 +1458,15 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
                }
 
                /* We have a winner! */
-               status = bt_graph_connect_ports(ctx->graph,
+               connect_ports_status = bt_graph_connect_ports(ctx->graph,
                        out_upstream_port, in_downstream_port, NULL);
                downstream_port = NULL;
-               switch (status) {
-               case BT_GRAPH_STATUS_OK:
-                       break;
-               case BT_GRAPH_STATUS_CANCELED:
-                       BT_LOGI_STR("Graph was canceled by user.");
-                       status = BT_GRAPH_STATUS_OK;
-                       break;
-               case BT_GRAPH_STATUS_COMPONENT_REFUSES_PORT_CONNECTION:
-                       BT_LOGE("A component refused a connection to one of its ports: "
-                               "upstream-comp-addr=%p, upstream-comp-name=\"%s\", "
-                               "upstream-port-addr=%p, upstream-port-name=\"%s\", "
-                               "downstream-comp-addr=%p, downstream-comp-name=\"%s\", "
-                               "downstream-port-addr=%p, downstream-port-name=\"%s\", "
-                               "conn-arg=\"%s\"",
-                               upstream_comp, bt_component_get_name(upstream_comp),
-                               upstream_port, bt_port_get_name(upstream_port),
-                               downstream_comp, cfg_conn->downstream_comp_name->str,
-                               downstream_port, downstream_port_name,
-                               cfg_conn->arg->str);
-                       fprintf(stderr,
-                               "A component refused a connection to one of its ports (`%s` to `%s`): %s\n",
-                               bt_port_get_name(upstream_port),
-                               downstream_port_name,
-                               cfg_conn->arg->str);
+               switch (connect_ports_status) {
+               case BT_GRAPH_CONNECT_PORTS_STATUS_OK:
                        break;
                default:
-                       BT_LOGE("Cannot create connection: graph refuses to connect ports: "
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Cannot create connection: graph refuses to connect ports: "
                                "upstream-comp-addr=%p, upstream-comp-name=\"%s\", "
                                "upstream-port-addr=%p, upstream-port-name=\"%s\", "
                                "downstream-comp-addr=%p, downstream-comp-name=\"%s\", "
@@ -1839,11 +1477,6 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
                                downstream_comp, cfg_conn->downstream_comp_name->str,
                                downstream_port, downstream_port_name,
                                cfg_conn->arg->str);
-                       fprintf(stderr,
-                               "Cannot create connection: graph refuses to connect ports (`%s` to `%s`): %s\n",
-                               bt_port_get_name(upstream_port),
-                               downstream_port_name,
-                               cfg_conn->arg->str);
                        goto error;
                }
 
@@ -1883,15 +1516,13 @@ int cmd_run_ctx_connect_upstream_port_to_downstream_component(
        }
 
        /* No downstream port found */
-       BT_LOGE("Cannot create connection: cannot find a matching downstream port for upstream port: "
+       BT_CLI_LOGE_APPEND_CAUSE(
+               "Cannot create connection: cannot find a matching downstream port for upstream port: "
                "upstream-port-addr=%p, upstream-port-name=\"%s\", "
                "downstream-comp-name=\"%s\", conn-arg=\"%s\"",
                upstream_port, bt_port_get_name(upstream_port),
                cfg_conn->downstream_comp_name->str,
                cfg_conn->arg->str);
-       fprintf(stderr,
-               "Cannot create connection: cannot find a matching downstream port for upstream port `%s`: %s\n",
-               bt_port_get_name(upstream_port), cfg_conn->arg->str);
 
 error:
        ret = -1;
@@ -1922,14 +1553,7 @@ int cmd_run_ctx_connect_upstream_port(struct cmd_run_ctx *ctx,
        BT_ASSERT(upstream_port_name);
        upstream_comp = bt_port_borrow_component_const(
                bt_port_output_as_port_const(upstream_port));
-       if (!upstream_comp) {
-               BT_LOGW("Upstream port to connect is not part of a component: "
-                       "port-addr=%p, port-name=\"%s\"",
-                       upstream_port, upstream_port_name);
-               ret = -1;
-               goto end;
-       }
-
+       BT_ASSERT(upstream_comp);
        upstream_comp_name = bt_component_get_name(upstream_comp);
        BT_ASSERT(upstream_comp_name);
        BT_LOGI("Connecting upstream port: comp-addr=%p, comp-name=\"%s\", "
@@ -1956,26 +1580,20 @@ int cmd_run_ctx_connect_upstream_port(struct cmd_run_ctx *ctx,
                ret = cmd_run_ctx_connect_upstream_port_to_downstream_component(
                        ctx, upstream_comp, upstream_port, cfg_conn);
                if (ret) {
-                       BT_LOGE("Cannot connect upstream port: "
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Cannot connect upstream port: "
                                "port-addr=%p, port-name=\"%s\"",
                                upstream_port,
                                upstream_port_name);
-                       fprintf(stderr,
-                               "Cannot connect port `%s` of component `%s` to a downstream port: %s\n",
-                               upstream_port_name,
-                               upstream_comp_name,
-                               cfg_conn->arg->str);
                        goto error;
                }
                goto end;
        }
 
-       BT_LOGE("Cannot connect upstream port: port does not match any connection argument: "
+       BT_CLI_LOGE_APPEND_CAUSE(
+               "Cannot connect upstream port: port does not match any connection argument: "
                "port-addr=%p, port-name=\"%s\"", upstream_port,
                upstream_port_name);
-       fprintf(stderr,
-               "Cannot create connection: upstream port `%s` does not match any connection\n",
-               upstream_port_name);
 
 error:
        ret = -1;
@@ -1985,13 +1603,14 @@ end:
 }
 
 static
-bt_graph_listener_status
+bt_graph_listener_func_status
 graph_output_port_added_listener(struct cmd_run_ctx *ctx,
                const bt_port_output *out_port)
 {
        const bt_component *comp;
        const bt_port *port = bt_port_output_as_port_const(out_port);
-       bt_graph_listener_status ret = BT_GRAPH_LISTENER_STATUS_OK;
+       bt_graph_listener_func_status ret =
+               BT_GRAPH_LISTENER_FUNC_STATUS_OK;
 
        comp = bt_port_borrow_component_const(port);
        BT_LOGI("Port added to a graph's component: comp-addr=%p, "
@@ -2003,10 +1622,7 @@ graph_output_port_added_listener(struct cmd_run_ctx *ctx,
                goto end;
        }
 
-       if (!comp) {
-               BT_LOGW_STR("Port has no component.");
-               goto end;
-       }
+       BT_ASSERT(comp);
 
        if (bt_port_is_connected(port)) {
                BT_LOGW_STR("Port is already connected.");
@@ -2014,9 +1630,8 @@ graph_output_port_added_listener(struct cmd_run_ctx *ctx,
        }
 
        if (cmd_run_ctx_connect_upstream_port(ctx, out_port)) {
-               BT_LOGF_STR("Cannot connect upstream port.");
-               fprintf(stderr, "Added port could not be connected: aborting\n");
-               ret = BT_GRAPH_LISTENER_STATUS_ERROR;
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot connect upstream port.");
+               ret = BT_GRAPH_LISTENER_FUNC_STATUS_ERROR;
                goto end;
        }
 
@@ -2025,7 +1640,7 @@ end:
 }
 
 static
-bt_graph_listener_status graph_source_output_port_added_listener(
+bt_graph_listener_func_status graph_source_output_port_added_listener(
                const bt_component_source *component,
                const bt_port_output *port, void *data)
 {
@@ -2033,7 +1648,7 @@ bt_graph_listener_status graph_source_output_port_added_listener(
 }
 
 static
-bt_graph_listener_status graph_filter_output_port_added_listener(
+bt_graph_listener_func_status graph_filter_output_port_added_listener(
                const bt_component_filter *component,
                const bt_port_output *port, void *data)
 {
@@ -2068,15 +1683,141 @@ void cmd_run_ctx_destroy(struct cmd_run_ctx *ctx)
        }
 
        BT_GRAPH_PUT_REF_AND_RESET(ctx->graph);
-       the_graph = NULL;
        ctx->cfg = NULL;
 }
 
+static
+int add_descriptor_to_component_descriptor_set(
+               bt_component_descriptor_set *comp_descr_set,
+               const char *plugin_name, const char *comp_cls_name,
+               bt_component_class_type comp_cls_type,
+               const bt_value *params)
+{
+       const bt_component_class *comp_cls;
+       int status = 0;
+
+       comp_cls = find_component_class(plugin_name, comp_cls_name,
+               comp_cls_type);
+       if (!comp_cls) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find component class: plugin-name=\"%s\", "
+                       "comp-cls-name=\"%s\", comp-cls-type=%d",
+                       plugin_name, comp_cls_name, comp_cls_type);
+               status = -1;
+               goto end;
+       }
+
+       status = bt_component_descriptor_set_add_descriptor(
+               comp_descr_set, comp_cls, params);
+       if (status != BT_COMPONENT_DESCRIPTOR_SET_ADD_DESCRIPTOR_STATUS_OK) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot append descriptor to component descriptor set: "
+                       "status=%s", bt_common_func_status_string(status));
+               goto end;
+       }
+
+end:
+       bt_component_class_put_ref(comp_cls);
+       return status;
+}
+
+static
+int append_descriptors_from_bt_config_component_array(
+               bt_component_descriptor_set *comp_descr_set,
+               GPtrArray *component_configs)
+{
+       int ret = 0;
+       uint64_t i;
+
+       for (i = 0; i < component_configs->len; i++) {
+               struct bt_config_component *cfg_comp =
+                       component_configs->pdata[i];
+
+               ret = add_descriptor_to_component_descriptor_set(
+                       comp_descr_set,
+                       cfg_comp->plugin_name->str,
+                       cfg_comp->comp_cls_name->str,
+                       cfg_comp->type, cfg_comp->params);
+               if (ret) {
+                       goto end;
+               }
+       }
+
+end:
+       return ret;
+}
+
+static
+bt_get_greatest_operative_mip_version_status get_greatest_operative_mip_version(
+               struct bt_config *cfg, uint64_t *mip_version)
+{
+       bt_get_greatest_operative_mip_version_status status =
+               BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_OK;
+       bt_component_descriptor_set *comp_descr_set = NULL;
+       int ret;
+
+       BT_ASSERT(cfg);
+       BT_ASSERT(mip_version);
+       comp_descr_set = bt_component_descriptor_set_create();
+       if (!comp_descr_set) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Failed to create a component descriptor set object.");
+               status = BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_MEMORY_ERROR;
+               goto end;
+       }
+
+       ret = append_descriptors_from_bt_config_component_array(
+               comp_descr_set, cfg->cmd_data.run.sources);
+       if (ret) {
+               status = BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_ERROR;
+               goto end;
+       }
+
+       ret = append_descriptors_from_bt_config_component_array(
+               comp_descr_set, cfg->cmd_data.run.filters);
+       if (ret) {
+               status = BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_ERROR;
+               goto end;
+       }
+
+       ret = append_descriptors_from_bt_config_component_array(
+               comp_descr_set, cfg->cmd_data.run.sinks);
+       if (ret) {
+               status = BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_ERROR;
+               goto end;
+       }
+
+       if (cfg->cmd_data.run.stream_intersection_mode) {
+               /*
+                * Stream intersection mode adds `flt.utils.trimmer`
+                * components; we need to include this type of component
+                * in the component descriptor set to get the real
+                * greatest operative MIP version.
+                */
+               ret = add_descriptor_to_component_descriptor_set(
+                       comp_descr_set, "utils", "trimmer",
+                       BT_COMPONENT_CLASS_TYPE_FILTER, NULL);
+               if (ret) {
+                       status = BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_ERROR;
+                       goto end;
+               }
+       }
+
+       status = bt_get_greatest_operative_mip_version(comp_descr_set,
+               bt_cli_log_level, mip_version);
+
+end:
+       bt_component_descriptor_set_put_ref(comp_descr_set);
+       return status;
+}
+
 static
 int cmd_run_ctx_init(struct cmd_run_ctx *ctx, struct bt_config *cfg)
 {
        int ret = 0;
-       bt_graph_status status;
+       bt_graph_add_listener_status add_listener_status;
+       bt_get_greatest_operative_mip_version_status mip_version_status;
+       uint64_t mip_version = UINT64_C(-1);
 
        ctx->cfg = cfg;
        ctx->connect_ports = false;
@@ -2107,25 +1848,52 @@ int cmd_run_ctx_init(struct cmd_run_ctx *ctx, struct bt_config *cfg)
                }
        }
 
-       ctx->graph = bt_graph_create();
+       /*
+        * Get the greatest operative MIP version to use to configure
+        * the graph to create.
+        */
+       mip_version_status = get_greatest_operative_mip_version(
+               cfg, &mip_version);
+       if (mip_version_status == BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_NO_MATCH) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Failed to find an operative message interchange "
+                       "protocol version to use to create the `run` command's "
+                       "graph (components are not interoperable).");
+               goto error;
+       } else if (mip_version_status < 0) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot find an operative message interchange "
+                       "protocol version to use to create the `run` command's "
+                       "graph: status=%s",
+                       bt_common_func_status_string(mip_version_status));
+               goto error;
+       }
+
+       BT_ASSERT(mip_version_status == BT_GET_GREATEST_OPERATIVE_MIP_VERSION_STATUS_OK);
+       BT_LOGI("Found operative message interchange protocol version to "
+               "configure the `run` command's graph: mip-version=%" PRIu64,
+               mip_version);
+       ctx->graph = bt_graph_create(mip_version);
        if (!ctx->graph) {
                goto error;
        }
 
-       the_graph = ctx->graph;
-       status = bt_graph_add_source_component_output_port_added_listener(
-               ctx->graph, graph_source_output_port_added_listener, NULL, ctx,
+       bt_graph_add_interrupter(ctx->graph, the_interrupter);
+       add_listener_status = bt_graph_add_source_component_output_port_added_listener(
+               ctx->graph, graph_source_output_port_added_listener, ctx,
                NULL);
-       if (status != BT_GRAPH_STATUS_OK) {
-               BT_LOGE_STR("Cannot add \"port added\" listener to graph.");
+       if (add_listener_status != BT_GRAPH_ADD_LISTENER_STATUS_OK) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot add \"port added\" listener to graph.");
                goto error;
        }
 
-       status = bt_graph_add_filter_component_output_port_added_listener(
-               ctx->graph, graph_filter_output_port_added_listener, NULL, ctx,
+       add_listener_status = bt_graph_add_filter_component_output_port_added_listener(
+               ctx->graph, graph_filter_output_port_added_listener, ctx,
                NULL);
-       if (status != BT_GRAPH_STATUS_OK) {
-               BT_LOGE_STR("Cannot add \"port added\" listener to graph.");
+       if (add_listener_status != BT_GRAPH_ADD_LISTENER_STATUS_OK) {
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot add \"port added\" listener to graph.");
                goto error;
        }
 
@@ -2139,6 +1907,116 @@ end:
        return ret;
 }
 
+/*
+ * Compute the intersection of all streams in the array `streams`, write it
+ * in `range`.
+ */
+
+static
+int compute_stream_intersection(const bt_value *streams,
+               struct trace_range *range)
+{
+       uint64_t i, stream_count;
+       int ret;
+
+       BT_ASSERT(bt_value_get_type(streams) == BT_VALUE_TYPE_ARRAY);
+
+       stream_count = bt_value_array_get_length(streams);
+
+       BT_ASSERT(stream_count > 0);
+
+       range->intersection_range_begin_ns = 0;
+       range->intersection_range_end_ns = UINT64_MAX;
+
+       for (i = 0; i < stream_count; i++) {
+               int64_t begin_ns, end_ns;
+               uint64_t begin_ns_u, end_ns_u;
+               const bt_value *stream_value;
+               const bt_value *range_ns_value;
+               const bt_value *begin_value;
+               const bt_value *end_value;
+
+               stream_value = bt_value_array_borrow_element_by_index_const(streams, i);
+               if (bt_value_get_type(stream_value) != BT_VALUE_TYPE_MAP) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "expected streams array element to be a map, got %s.",
+                               bt_common_value_type_string(bt_value_get_type(stream_value)));
+                       goto error;
+               }
+
+               range_ns_value = bt_value_map_borrow_entry_value_const(
+                       stream_value, "range-ns");
+               if (!range_ns_value) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "missing expected `range-ns` key in stream map.");
+                       goto error;
+               }
+
+               if (bt_value_get_type(range_ns_value) != BT_VALUE_TYPE_MAP) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "expected `range-ns` entry value of stream map to be a map, got %s.",
+                               bt_common_value_type_string(bt_value_get_type(range_ns_value)));
+                       goto error;
+               }
+
+               begin_value = bt_value_map_borrow_entry_value_const(range_ns_value, "begin");
+               if (!begin_value) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "missing expected `begin` key in range-ns map.");
+                       goto error;
+               }
+
+               if (bt_value_get_type(begin_value) != BT_VALUE_TYPE_SIGNED_INTEGER) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "expected `begin` entry value of range-ns map to be a signed integer, got %s.",
+                               bt_common_value_type_string(bt_value_get_type(range_ns_value)));
+                       goto error;
+               }
+
+               end_value = bt_value_map_borrow_entry_value_const(range_ns_value, "end");
+               if (!end_value) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "missing expected `end` key in range-ns map.");
+                       goto error;
+               }
+
+               if (bt_value_get_type(end_value) != BT_VALUE_TYPE_SIGNED_INTEGER) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected format of `babeltrace.trace-infos` query result: "
+                               "expected `end` entry value of range-ns map to be a signed integer, got %s.",
+                               bt_common_value_type_string(bt_value_get_type(range_ns_value)));
+                       goto error;
+               }
+
+               begin_ns = bt_value_integer_signed_get(begin_value);
+               end_ns = bt_value_integer_signed_get(end_value);
+
+               if (begin_ns < 0 || end_ns < 0 || end_ns < begin_ns) {
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Invalid stream range values: "
+                               "range-ns:begin=%" PRId64 ", "
+                               "range-ns:end=%" PRId64,
+                               begin_ns, end_ns);
+                       goto error;
+               }
+
+               begin_ns_u = begin_ns;
+               end_ns_u = end_ns;
+
+               range->intersection_range_begin_ns =
+                       MAX(range->intersection_range_begin_ns, begin_ns_u);
+               range->intersection_range_end_ns =
+                       MIN(range->intersection_range_end_ns, end_ns_u);
+       }
+
+       ret = 0;
+       goto end;
+error:
+       ret = -1;
+
+end:
+       return ret;
+}
+
 static
 int set_stream_intersections(struct cmd_run_ctx *ctx,
                struct bt_config_component *cfg_comp,
@@ -2146,109 +2024,95 @@ int set_stream_intersections(struct cmd_run_ctx *ctx,
 {
        int ret = 0;
        uint64_t trace_idx;
-       int64_t trace_count;
-       const char *path = NULL;
+       uint64_t trace_count;
        const bt_value *query_result = NULL;
        const bt_value *trace_info = NULL;
-       const bt_value *intersection_range = NULL;
-       const bt_value *intersection_begin = NULL;
-       const bt_value *intersection_end = NULL;
        const bt_value *stream_infos = NULL;
        const bt_value *stream_info = NULL;
        struct port_id *port_id = NULL;
-       struct trace_range *trace_range = NULL;
+       struct trace_range *stream_intersection = NULL;
        const char *fail_reason = NULL;
        const bt_component_class *comp_cls =
                bt_component_class_source_as_component_class_const(src_comp_cls);
 
-       ret = query(ctx->cfg, comp_cls, "trace-info",
+       ret = query(ctx->cfg, comp_cls, "babeltrace.trace-infos",
                cfg_comp->params, &query_result,
                &fail_reason);
        if (ret) {
-               BT_LOGD("Component class does not support the `trace-info` query: %s: "
+               BT_CLI_LOGE_APPEND_CAUSE("Failed to execute `babeltrace.trace-infos` query: %s: "
                        "comp-class-name=\"%s\"", fail_reason,
                        bt_component_class_get_name(comp_cls));
                ret = -1;
-               goto error;
+               goto end;
        }
 
        BT_ASSERT(query_result);
 
        if (!bt_value_is_array(query_result)) {
-               BT_LOGD("Unexpected format of \'trace-info\' query result: "
-                       "component-class-name=%s",
-                       bt_component_class_get_name(comp_cls));
+               BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: expecting result to be an array: "
+                       "component-class-name=%s, actual-type=%s",
+                       bt_component_class_get_name(comp_cls),
+                       bt_common_value_type_string(bt_value_get_type(query_result)));
                ret = -1;
-               goto error;
+               goto end;
        }
 
-       trace_count = bt_value_array_get_size(query_result);
-       if (trace_count < 0) {
+       trace_count = bt_value_array_get_length(query_result);
+       if (trace_count == 0) {
+               BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: result is empty: "
+                       "component-class-name=%s", bt_component_class_get_name(comp_cls));
                ret = -1;
-               goto error;
+               goto end;
        }
 
        for (trace_idx = 0; trace_idx < trace_count; trace_idx++) {
-               int64_t begin, end;
                uint64_t stream_idx;
                int64_t stream_count;
+               struct trace_range trace_intersection;
 
                trace_info = bt_value_array_borrow_element_by_index_const(
                        query_result, trace_idx);
-               if (!trace_info || !bt_value_is_map(trace_info)) {
-                       ret = -1;
-                       BT_LOGD_STR("Cannot retrieve trace from query result.");
-                       goto error;
-               }
-
-               intersection_range = bt_value_map_borrow_entry_value_const(
-                       trace_info, "intersection-range-ns");
-               if (!intersection_range) {
-                       ret = -1;
-                       BT_LOGD_STR("Cannot retrieve \'intersetion-range-ns\' field from query result.");
-                       goto error;
-               }
-
-               intersection_begin = bt_value_map_borrow_entry_value_const(intersection_range,
-                                                                          "begin");
-               if (!intersection_begin) {
+               if (!bt_value_is_map(trace_info)) {
                        ret = -1;
-                       BT_LOGD_STR("Cannot retrieve intersection-range-ns \'begin\' field from query result.");
-                       goto error;
+                       BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: expecting element to be a map: "
+                               "component-class-name=%s, actual-type=%s",
+                               bt_component_class_get_name(comp_cls),
+                               bt_common_value_type_string(bt_value_get_type(trace_info)));
+                       goto end;
                }
 
-               intersection_end = bt_value_map_borrow_entry_value_const(intersection_range,
-                                                                        "end");
-               if (!intersection_end) {
+               stream_infos = bt_value_map_borrow_entry_value_const(
+                       trace_info, "stream-infos");
+               if (!stream_infos) {
                        ret = -1;
-                       BT_LOGD_STR("Cannot retrieve intersection-range-ns \'end\' field from query result.");
-                       goto error;
+                       BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: missing `streams` key in trace info map: "
+                               "component-class-name=%s",
+                               bt_component_class_get_name(comp_cls));
+                       goto end;
                }
 
-               begin = bt_value_signed_integer_get(intersection_begin);
-               end = bt_value_signed_integer_get(intersection_end);
-
-               if (begin < 0 || end < 0 || end < begin) {
-                       BT_LOGW("Invalid trace stream intersection values: "
-                               "intersection-range-ns:begin=%" PRId64
-                               ", intersection-range-ns:end=%" PRId64,
-                               begin, end);
+               if (!bt_value_is_array(stream_infos)) {
                        ret = -1;
-                       goto error;
+                       BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: expecting `streams` entry of trace info map to be an array: "
+                               "component-class-name=%s, actual-type=%s",
+                               bt_component_class_get_name(comp_cls),
+                               bt_common_value_type_string(bt_value_get_type(stream_infos)));
+                       goto end;
                }
 
-               stream_infos = bt_value_map_borrow_entry_value_const(trace_info,
-                                                                    "streams");
-               if (!stream_infos || !bt_value_is_array(stream_infos)) {
+               stream_count = bt_value_array_get_length(stream_infos);
+               if (stream_count == 0) {
                        ret = -1;
-                       BT_LOGD_STR("Cannot retrieve stream information from trace in query result.");
-                       goto error;
+                       BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: list of streams is empty: "
+                               "component-class-name=%s",
+                               bt_component_class_get_name(comp_cls));
+                       goto end;
                }
 
-               stream_count = bt_value_array_get_size(stream_infos);
-               if (stream_count < 0) {
-                       ret = -1;
-                       goto error;
+               ret = compute_stream_intersection(stream_infos, &trace_intersection);
+               if (ret != 0) {
+                       BT_CLI_LOGE_APPEND_CAUSE("Failed to compute trace streams intersection.");
+                       goto end;
                }
 
                for (stream_idx = 0; stream_idx < stream_count; stream_idx++) {
@@ -2257,68 +2121,83 @@ int set_stream_intersections(struct cmd_run_ctx *ctx,
                        port_id = g_new0(struct port_id, 1);
                        if (!port_id) {
                                ret = -1;
-                               BT_LOGE_STR("Cannot allocate memory for port_id structure.");
-                               goto error;
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Cannot allocate memory for port_id structure.");
+                               goto end;
                        }
                        port_id->instance_name = strdup(cfg_comp->instance_name->str);
                        if (!port_id->instance_name) {
                                ret = -1;
-                               BT_LOGE_STR("Cannot allocate memory for port_id component instance name.");
-                               goto error;
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Cannot allocate memory for port_id component instance name.");
+                               goto end;
                        }
 
-                       trace_range = g_new0(struct trace_range, 1);
-                       if (!trace_range) {
+                       stream_intersection = g_new0(struct trace_range, 1);
+                       if (!stream_intersection) {
                                ret = -1;
-                               BT_LOGE_STR("Cannot allocate memory for trace_range structure.");
-                               goto error;
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Cannot allocate memory for trace_range structure.");
+                               goto end;
                        }
-                       trace_range->intersection_range_begin_ns = begin;
-                       trace_range->intersection_range_end_ns = end;
+
+                       *stream_intersection = trace_intersection;
 
                        stream_info = bt_value_array_borrow_element_by_index_const(
                                stream_infos, stream_idx);
-                       if (!stream_info || !bt_value_is_map(stream_info)) {
+                       if (!bt_value_is_map(stream_info)) {
                                ret = -1;
-                               BT_LOGE_STR("Cannot retrieve stream informations from trace in query result.");
-                               goto error;
+                               BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: "
+                                       "expecting element of stream list to be a map: "
+                                       "component-class-name=%s, actual-type=%s",
+                                       bt_component_class_get_name(comp_cls),
+                                       bt_common_value_type_string(bt_value_get_type(stream_info)));
+                               goto end;
                        }
 
                        port_name = bt_value_map_borrow_entry_value_const(stream_info, "port-name");
-                       if (!port_name || !bt_value_is_string(port_name)) {
+                       if (!port_name) {
                                ret = -1;
-                               BT_LOGE_STR("Cannot retrieve port name in query result.");
-                               goto error;
+                               BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: "
+                                       "missing `port-name` key in stream info map: "
+                                       "component-class-name=%s",
+                                       bt_component_class_get_name(comp_cls));
+                               goto end;
+                       }
+
+                       if (!bt_value_is_string(port_name)) {
+                               ret = -1;
+                               BT_CLI_LOGE_APPEND_CAUSE("`babeltrace.trace-infos` query: "
+                                       "expecting `port-name` entry of stream info map to be a string: "
+                                       "component-class-name=%s, actual-type=%s",
+                                       bt_component_class_get_name(comp_cls),
+                                       bt_common_value_type_string(bt_value_get_type(port_name)));
+                               goto end;
                        }
 
                        port_id->port_name = g_strdup(bt_value_string_get(port_name));
                        if (!port_id->port_name) {
                                ret = -1;
-                               BT_LOGE_STR("Cannot allocate memory for port_id port_name.");
-                               goto error;
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Cannot allocate memory for port_id port_name.");
+                               goto end;
                        }
 
                        BT_LOGD("Inserting stream intersection ");
 
-                       g_hash_table_insert(ctx->intersections, port_id, trace_range);
+                       g_hash_table_insert(ctx->intersections, port_id, stream_intersection);
 
                        port_id = NULL;
-                       trace_range = NULL;
+                       stream_intersection = NULL;
                }
        }
 
-       goto end;
+       ret = 0;
 
-error:
-       fprintf(stderr, "%s%sCannot determine stream intersection of trace at path \'%s\'.%s\n",
-               bt_common_color_bold(),
-               bt_common_color_fg_yellow(),
-               path ? path : "(unknown)",
-               bt_common_color_reset());
 end:
        bt_value_put_ref(query_result);
        g_free(port_id);
-       g_free(trace_range);
+       g_free(stream_intersection);
        return ret;
 }
 
@@ -2353,24 +2232,16 @@ int cmd_run_ctx_create_components_from_config_components(
                                cfg_comp->comp_cls_name->str);
                        break;
                default:
-                       abort();
+                       bt_common_abort();
                }
 
                if (!comp_cls) {
-                       BT_LOGE("Cannot find component class: plugin-name=\"%s\", "
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Cannot find component class: plugin-name=\"%s\", "
                                "comp-cls-name=\"%s\", comp-cls-type=%d",
                                cfg_comp->plugin_name->str,
                                cfg_comp->comp_cls_name->str,
                                cfg_comp->type);
-                       fprintf(stderr, "%s%sCannot find component class %s",
-                               bt_common_color_bold(),
-                               bt_common_color_fg_red(),
-                               bt_common_color_reset());
-                       print_plugin_comp_cls_opt(stderr,
-                               cfg_comp->plugin_name->str,
-                               cfg_comp->comp_cls_name->str,
-                               cfg_comp->type);
-                       fprintf(stderr, "\n");
                        goto error;
                }
 
@@ -2382,35 +2253,34 @@ int cmd_run_ctx_create_components_from_config_components(
                                comp_cls, cfg_comp->instance_name->str,
                                cfg_comp->params, cfg_comp->log_level,
                                (void *) &comp);
+                       bt_component_source_get_ref(comp);
                        break;
                case BT_COMPONENT_CLASS_TYPE_FILTER:
                        ret = bt_graph_add_filter_component(ctx->graph,
                                comp_cls, cfg_comp->instance_name->str,
                                cfg_comp->params, cfg_comp->log_level,
                                (void *) &comp);
+                       bt_component_filter_get_ref(comp);
                        break;
                case BT_COMPONENT_CLASS_TYPE_SINK:
                        ret = bt_graph_add_sink_component(ctx->graph,
                                comp_cls, cfg_comp->instance_name->str,
                                cfg_comp->params, cfg_comp->log_level,
                                (void *) &comp);
+                       bt_component_sink_get_ref(comp);
                        break;
                default:
-                       abort();
+                       bt_common_abort();
                }
 
                if (ret) {
-                       BT_LOGE("Cannot create component: plugin-name=\"%s\", "
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Cannot create component: plugin-name=\"%s\", "
                                "comp-cls-name=\"%s\", comp-cls-type=%d, "
                                "comp-name=\"%s\"",
                                cfg_comp->plugin_name->str,
                                cfg_comp->comp_cls_name->str,
                                cfg_comp->type, cfg_comp->instance_name->str);
-                       fprintf(stderr, "%s%sCannot create component `%s`%s\n",
-                               bt_common_color_bold(),
-                               bt_common_color_fg_red(),
-                               cfg_comp->instance_name->str,
-                               bt_common_color_reset());
                        goto error;
                }
 
@@ -2418,6 +2288,8 @@ int cmd_run_ctx_create_components_from_config_components(
                                cfg_comp->type == BT_COMPONENT_CLASS_TYPE_SOURCE) {
                        ret = set_stream_intersections(ctx, cfg_comp, comp_cls);
                        if (ret) {
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Cannot determine stream intersection of trace.");
                                goto error;
                        }
                }
@@ -2441,7 +2313,7 @@ int cmd_run_ctx_create_components_from_config_components(
                                GUINT_TO_POINTER(quark), (void *) comp);
                        break;
                default:
-                       abort();
+                       bt_common_abort();
                }
 
                comp = NULL;
@@ -2564,44 +2436,22 @@ end:
        return ret;
 }
 
-static inline
-const char *bt_graph_status_str(bt_graph_status status)
-{
-       switch (status) {
-       case BT_GRAPH_STATUS_OK:
-               return "BT_GRAPH_STATUS_OK";
-       case BT_GRAPH_STATUS_END:
-               return "BT_GRAPH_STATUS_END";
-       case BT_GRAPH_STATUS_AGAIN:
-               return "BT_GRAPH_STATUS_AGAIN";
-       case BT_GRAPH_STATUS_COMPONENT_REFUSES_PORT_CONNECTION:
-               return "BT_GRAPH_STATUS_COMPONENT_REFUSES_PORT_CONNECTION";
-       case BT_GRAPH_STATUS_CANCELED:
-               return "BT_GRAPH_STATUS_CANCELED";
-       case BT_GRAPH_STATUS_ERROR:
-               return "BT_GRAPH_STATUS_ERROR";
-       case BT_GRAPH_STATUS_NOMEM:
-               return "BT_GRAPH_STATUS_NOMEM";
-       default:
-               return "(unknown)";
-       }
-}
-
 static
-int cmd_run(struct bt_config *cfg)
+enum bt_cmd_status cmd_run(struct bt_config *cfg)
 {
-       int ret = 0;
+       enum bt_cmd_status cmd_status;
        struct cmd_run_ctx ctx = { 0 };
 
        /* Initialize the command's context and the graph object */
        if (cmd_run_ctx_init(&ctx, cfg)) {
-               BT_LOGE_STR("Cannot initialize the command's context.");
-               fprintf(stderr, "Cannot initialize the command's context\n");
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot initialize the command's context.");
                goto error;
        }
 
-       if (canceled) {
-               BT_LOGI_STR("Canceled by user before creating components.");
+       if (bt_interrupter_is_set(the_interrupter)) {
+               BT_CLI_LOGW_APPEND_CAUSE(
+                       "Interrupted by user before creating components.");
                goto error;
        }
 
@@ -2609,13 +2459,13 @@ int cmd_run(struct bt_config *cfg)
 
        /* Create the requested component instances */
        if (cmd_run_ctx_create_components(&ctx)) {
-               BT_LOGE_STR("Cannot create components.");
-               fprintf(stderr, "Cannot create components\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot create components.");
                goto error;
        }
 
-       if (canceled) {
-               BT_LOGI_STR("Canceled by user before connecting components.");
+       if (bt_interrupter_is_set(the_interrupter)) {
+               BT_CLI_LOGW_APPEND_CAUSE(
+                       "Interrupted by user before connecting components.");
                goto error;
        }
 
@@ -2623,13 +2473,8 @@ int cmd_run(struct bt_config *cfg)
 
        /* Connect the initially visible component ports */
        if (cmd_run_ctx_connect_ports(&ctx)) {
-               BT_LOGE_STR("Cannot connect initial component ports.");
-               fprintf(stderr, "Cannot connect initial component ports\n");
-               goto error;
-       }
-
-       if (canceled) {
-               BT_LOGI_STR("Canceled by user before running the graph.");
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Cannot connect initial component ports.");
                goto error;
        }
 
@@ -2637,7 +2482,7 @@ int cmd_run(struct bt_config *cfg)
 
        /* Run the graph */
        while (true) {
-               bt_graph_status graph_status = bt_graph_run(ctx.graph);
+               bt_graph_run_status run_status = bt_graph_run(ctx.graph);
 
                /*
                 * Reset console in case something messed with console
@@ -2647,52 +2492,51 @@ int cmd_run(struct bt_config *cfg)
                fflush(stdout);
                fprintf(stderr, "%s", bt_common_color_reset());
                BT_LOGT("bt_graph_run() returned: status=%s",
-                       bt_graph_status_str(graph_status));
+                       bt_common_func_status_string(run_status));
 
-               switch (graph_status) {
-               case BT_GRAPH_STATUS_OK:
-                       break;
-               case BT_GRAPH_STATUS_CANCELED:
-                       BT_LOGI_STR("Graph was canceled by user.");
-                       goto error;
-               case BT_GRAPH_STATUS_AGAIN:
-                       if (bt_graph_is_canceled(ctx.graph)) {
-                               BT_LOGI_STR("Graph was canceled by user.");
-                               goto error;
+               switch (run_status) {
+               case BT_GRAPH_RUN_STATUS_OK:
+                       cmd_status = BT_CMD_STATUS_OK;
+                       goto end;
+               case BT_GRAPH_RUN_STATUS_AGAIN:
+                       if (bt_interrupter_is_set(the_interrupter)) {
+                               /*
+                                * The graph was interrupted by a SIGINT.
+                                */
+                               cmd_status = BT_CMD_STATUS_INTERRUPTED;
+                               goto end;
                        }
 
                        if (cfg->cmd_data.run.retry_duration_us > 0) {
-                               BT_LOGT("Got BT_GRAPH_STATUS_AGAIN: sleeping: "
+                               BT_LOGT("Got BT_GRAPH_RUN_STATUS_AGAIN: sleeping: "
                                        "time-us=%" PRIu64,
                                        cfg->cmd_data.run.retry_duration_us);
 
                                if (usleep(cfg->cmd_data.run.retry_duration_us)) {
-                                       if (bt_graph_is_canceled(ctx.graph)) {
-                                               BT_LOGI_STR("Graph was canceled by user.");
-                                               goto error;
+                                       if (bt_interrupter_is_set(the_interrupter)) {
+                                               cmd_status = BT_CMD_STATUS_INTERRUPTED;
+                                               goto end;
                                        }
                                }
                        }
                        break;
-               case BT_GRAPH_STATUS_END:
-                       goto end;
                default:
-                       BT_LOGE_STR("Graph failed to complete successfully");
-                       fprintf(stderr, "Graph failed to complete successfully\n");
+                       if (bt_interrupter_is_set(the_interrupter)) {
+                               cmd_status = BT_CMD_STATUS_INTERRUPTED;
+                               goto end;
+                       }
+
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Graph failed to complete successfully");
                        goto error;
                }
        }
-
-       goto end;
-
 error:
-       if (ret == 0) {
-               ret = -1;
-       }
+       cmd_status = BT_CMD_STATUS_ERROR;
 
 end:
        cmd_run_ctx_destroy(&ctx);
-       return ret;
+       return cmd_status;
 }
 
 static
@@ -2711,13 +2555,14 @@ void warn_command_name_and_directory_clash(struct bt_config *cfg)
 
        if (g_file_test(cfg->command_name,
                        G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR)) {
-               fprintf(stderr, "\nNOTE: The `%s` command was executed. If you meant to convert a\n",
-                       cfg->command_name);
-               fprintf(stderr, "trace located in the local `%s` directory, please use:\n",
-                       cfg->command_name);
-               fprintf(stderr, "\n");
-               fprintf(stderr, "    babeltrace2 convert %s [OPTIONS]\n",
-                       cfg->command_name);
+               _bt_log_write_d(_BT_LOG_SRCLOC_FUNCTION, __FILE__, __LINE__,
+                               BT_LOG_WARNING, BT_LOG_TAG,
+                               "The `%s` command was executed. "
+                               "If you meant to convert a trace located in "
+                               "the local `%s` directory, please use:\n\n"
+                               "    babeltrace2 convert %s [OPTIONS]",
+                               cfg->command_name, cfg->command_name,
+                               cfg->command_name);
        }
 }
 
@@ -2728,96 +2573,65 @@ void init_log_level(void)
 }
 
 static
-void set_auto_log_levels(struct bt_config *cfg)
+void print_error_causes(void)
 {
-       const char **env_var_name;
-
-       /*
-        * Override the configuration's default log level if
-        * BABELTRACE_VERBOSE or BABELTRACE_DEBUG environment variables
-        * are found for backward compatibility with legacy Babetrace 1.
-        */
-       if (getenv("BABELTRACE_DEBUG") &&
-                       strcmp(getenv("BABELTRACE_DEBUG"), "1") == 0) {
-               cfg->log_level = BT_LOG_TRACE;
-       } else if (getenv("BABELTRACE_VERBOSE") &&
-                       strcmp(getenv("BABELTRACE_VERBOSE"), "1") == 0) {
-               cfg->log_level = BT_LOG_INFO;
-       }
+       const bt_error *error = bt_current_thread_take_error();
+       unsigned int columns;
+       gchar *error_str = NULL;
 
-       /*
-        * Set log levels according to --debug or --verbose. For
-        * backward compatibility, --debug is more verbose than
-        * --verbose. So:
-        *
-        *     --verbose: INFO log level
-        *     --debug:   TRACE log level (includes DEBUG, which is
-        *                is less verbose than TRACE in the internal
-        *                logging framework)
-        */
-       if (!getenv("LIBBABELTRACE2_INIT_LOG_LEVEL")) {
-               if (cfg->verbose) {
-                       bt_logging_set_global_level(BT_LOG_INFO);
-               } else if (cfg->debug) {
-                       bt_logging_set_global_level(BT_LOG_TRACE);
-               } else {
-                       /*
-                        * Set library's default log level if not
-                        * explicitly specified.
-                        */
-                       bt_logging_set_global_level(cfg->log_level);
-               }
+       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_bright_red(),
+                       bt_common_color_reset());
+               goto end;
        }
 
-       if (!getenv(ENV_BABELTRACE_CLI_LOG_LEVEL)) {
-               if (cfg->verbose) {
-                       bt_cli_log_level = BT_LOG_INFO;
-               } else if (cfg->debug) {
-                       bt_cli_log_level = BT_LOG_TRACE;
-               } else {
-                       /*
-                        * Set CLI's default log level if not explicitly
-                        * specified.
-                        */
-                       bt_cli_log_level = cfg->log_level;
-               }
+       /* 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;
        }
 
-       env_var_name = log_level_env_var_names;
+       /*
+        * This helps visually separate the error causes from the last
+        * logging statement.
+        */
+       fputc('\n',  stderr);
 
-       while (*env_var_name) {
-               if (!getenv(*env_var_name)) {
-                       if (cfg->verbose) {
-                               g_setenv(*env_var_name, "INFO", 1);
-                       } else if (cfg->debug) {
-                               g_setenv(*env_var_name, "TRACE", 1);
-                       } else {
-                               char val[2] = { 0 };
+       error_str = format_bt_error(error, columns, bt_cli_log_level,
+               BT_COMMON_COLOR_WHEN_AUTO);
+       BT_ASSERT(error_str);
 
-                               /*
-                                * Set module's default log level if not
-                                * explicitly specified.
-                                */
-                               val[0] = bt_log_get_letter_from_level(
-                                       cfg->log_level);
-                               g_setenv(*env_var_name, val, 1);
-                       }
-               }
+       fprintf(stderr, "%s\n", error_str);
 
-               env_var_name++;
+end:
+       if (error) {
+               bt_error_release(error);
        }
+
+       g_free(error_str);
 }
 
 int main(int argc, const char **argv)
 {
-       int ret;
-       int retcode;
-       struct bt_config *cfg;
+       int ret, retcode;
+       enum bt_cmd_status cmd_status;
+       struct bt_config *cfg = NULL;
 
        init_log_level();
        set_signal_handler();
-       init_static_data();
-       cfg = bt_config_cli_args_create_with_default(argc, argv, &retcode);
+       init_loaded_plugins();
+
+       BT_ASSERT(!the_interrupter);
+       the_interrupter = bt_interrupter_create();
+       if (!the_interrupter) {
+               BT_CLI_LOGE_APPEND_CAUSE("Failed to create an interrupter object.");
+               retcode = 1;
+               goto end;
+       }
+
+       cfg = bt_config_cli_args_create_with_default(argc, argv, &retcode,
+               the_interrupter);
 
        if (retcode < 0) {
                /* Quit without errors; typically usage/version */
@@ -2827,24 +2641,25 @@ int main(int argc, const char **argv)
        }
 
        if (retcode > 0) {
-               BT_LOGE("Command-line error: retcode=%d", retcode);
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Command-line error: retcode=%d", retcode);
                goto end;
        }
 
        if (!cfg) {
-               BT_LOGE_STR("Failed to create a valid Babeltrace configuration.");
-               fprintf(stderr, "Failed to create Babeltrace configuration\n");
+               BT_CLI_LOGE_APPEND_CAUSE(
+                       "Failed to create a valid Babeltrace CLI configuration.");
                retcode = 1;
                goto end;
        }
 
-       set_auto_log_levels(cfg);
        print_cfg(cfg);
 
        if (cfg->command_needs_plugins) {
-               ret = load_all_plugins(cfg->plugin_paths);
+               ret = require_loaded_plugins(cfg->plugin_paths);
                if (ret) {
-                       BT_LOGE("Failed to load plugins: ret=%d", ret);
+                       BT_CLI_LOGE_APPEND_CAUSE(
+                               "Failed to load plugins: ret=%d", ret);
                        retcode = 1;
                        goto end;
                }
@@ -2855,35 +2670,60 @@ int main(int argc, const char **argv)
 
        switch (cfg->command) {
        case BT_CONFIG_COMMAND_RUN:
-               ret = cmd_run(cfg);
+               cmd_status = cmd_run(cfg);
                break;
        case BT_CONFIG_COMMAND_LIST_PLUGINS:
-               ret = cmd_list_plugins(cfg);
+               cmd_status = cmd_list_plugins(cfg);
                break;
        case BT_CONFIG_COMMAND_HELP:
-               ret = cmd_help(cfg);
+               cmd_status = cmd_help(cfg);
                break;
        case BT_CONFIG_COMMAND_QUERY:
-               ret = cmd_query(cfg);
+               cmd_status = cmd_query(cfg);
                break;
        case BT_CONFIG_COMMAND_PRINT_CTF_METADATA:
-               ret = cmd_print_ctf_metadata(cfg);
+               cmd_status = cmd_print_ctf_metadata(cfg);
                break;
        case BT_CONFIG_COMMAND_PRINT_LTTNG_LIVE_SESSIONS:
-               ret = cmd_print_lttng_live_sessions(cfg);
+               cmd_status = cmd_print_lttng_live_sessions(cfg);
                break;
        default:
                BT_LOGF("Invalid/unknown command: cmd=%d", cfg->command);
-               abort();
+               bt_common_abort();
        }
 
-       BT_LOGI("Command completed: cmd=%d, command-name=\"%s\", ret=%d",
-               cfg->command, cfg->command_name, ret);
+       BT_LOGI("Command completed: cmd=%d, command-name=\"%s\", command-status=\"%s\"",
+               cfg->command, cfg->command_name, bt_cmd_status_string(cmd_status));
        warn_command_name_and_directory_clash(cfg);
-       retcode = ret ? 1 : 0;
+
+       switch (cmd_status) {
+       case BT_CMD_STATUS_OK:
+               retcode = 0;
+               break;
+       case BT_CMD_STATUS_ERROR:
+               retcode = 1;
+               break;
+       case BT_CMD_STATUS_INTERRUPTED:
+               retcode = 2;
+               break;
+       default:
+               BT_LOGF("Invalid command status: cmd-status=%d", cmd_status);
+               bt_common_abort();
+       }
 
 end:
+       if (retcode == 1) {
+               print_error_causes();
+       }
+
        BT_OBJECT_PUT_REF_AND_RESET(cfg);
-       fini_static_data();
+       fini_loaded_plugins();
+       bt_interrupter_put_ref(the_interrupter);
+
+       /*
+        * Clear current thread's error in case there is one to avoid a
+        * memory leak.
+        */
+       bt_current_thread_clear_error();
        return retcode;
 }
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