Standardize `!ptr` i/o `ptr == NULL`, `ptr` i/o `ptr != NULL`
[babeltrace.git] / src / cli / babeltrace2-cfg-cli-args.c
index 1b7bd9321c1212ad7db2d4261b9f1cb3815b1bc3..a16fbfceaa4b6d2cff737bddd1eee9ba374c7b4d 100644 (file)
 #include "babeltrace2-cfg-cli-args.h"
 #include "babeltrace2-cfg-cli-args-connect.h"
 #include "babeltrace2-cfg-cli-params-arg.h"
+#include "babeltrace2-plugins.h"
+#include "babeltrace2-cfg-src-auto-disc.h"
 #include "common/version.h"
 
-/*
- * Error printf() macro which prepends "Error: " the first time it's
- * called. This gives a nicer feel than having a bunch of error prefixes
- * (since the following lines usually describe the error and possible
- * solutions), or the error prefix just at the end.
- */
-#define printf_err(fmt, args...)                                       \
-       do {                                                            \
-               if (is_first_error) {                                   \
-                       fprintf(stderr, "Command line error: ");        \
-                       is_first_error = false;                         \
-               }                                                       \
-               fprintf(stderr, fmt, ##args);                           \
-       } while (0)
-
-static bool is_first_error = true;
 static const int cli_default_log_level = BT_LOG_WARNING;
 
 /* INI-style parsing FSM states */
@@ -146,14 +132,7 @@ enum legacy_output_format {
        LEGACY_OUTPUT_FORMAT_DUMMY,
 };
 
-/*
- * Prints the "out of memory" error.
- */
-static
-void print_err_oom(void)
-{
-       printf_err("Out of memory\n");
-}
+#define BT_CLI_LOGE_APPEND_CAUSE_OOM() BT_CLI_LOGE_APPEND_CAUSE("Out of memory.")
 
 /*
  * Returns the plugin name, component class name, component class type,
@@ -187,7 +166,7 @@ void plugin_comp_cls_names(const char *arg, char **name, char **plugin,
        BT_ASSERT(comp_cls_type);
 
        if (!bt_common_string_is_printable(arg)) {
-               printf_err("Argument contains a non-printable character\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Argument contains a non-printable character.");
                goto error;
        }
 
@@ -207,7 +186,7 @@ void plugin_comp_cls_names(const char *arg, char **name, char **plugin,
        /* Parse the component class type */
        gs_comp_cls_type = bt_common_string_until(at, ".:\\", ".", &end_pos);
        if (!gs_comp_cls_type || at[end_pos] == '\0') {
-               printf_err("Missing component class type (`source`, `filter`, or `sink`)\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Missing component class type (`source`, `filter`, or `sink`).");
                goto error;
        }
 
@@ -220,7 +199,7 @@ void plugin_comp_cls_names(const char *arg, char **name, char **plugin,
        } else if (strcmp(gs_comp_cls_type->str, "sink") == 0) {
                *comp_cls_type = BT_COMPONENT_CLASS_TYPE_SINK;
        } else {
-               printf_err("Unknown component class type: `%s`\n",
+               BT_CLI_LOGE_APPEND_CAUSE("Unknown component class type: `%s`.",
                        gs_comp_cls_type->str);
                goto error;
        }
@@ -230,7 +209,7 @@ void plugin_comp_cls_names(const char *arg, char **name, char **plugin,
        /* Parse the plugin name */
        gs_plugin = bt_common_string_until(at, ".:\\", ".", &end_pos);
        if (!gs_plugin || gs_plugin->len == 0 || at[end_pos] == '\0') {
-               printf_err("Missing plugin or component class name\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Missing plugin or component class name.");
                goto error;
        }
 
@@ -239,7 +218,7 @@ void plugin_comp_cls_names(const char *arg, char **name, char **plugin,
        /* Parse the component class name */
        gs_comp_cls = bt_common_string_until(at, ".:\\", ".", &end_pos);
        if (!gs_comp_cls || gs_comp_cls->len == 0) {
-               printf_err("Missing component class name\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Missing component class name.");
                goto error;
        }
 
@@ -359,7 +338,7 @@ struct bt_config_component *bt_config_component_create(
 
        cfg_component = g_new0(struct bt_config_component, 1);
        if (!cfg_component) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -368,19 +347,19 @@ struct bt_config_component *bt_config_component_create(
        cfg_component->type = type;
        cfg_component->plugin_name = g_string_new(plugin_name);
        if (!cfg_component->plugin_name) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg_component->comp_cls_name = g_string_new(comp_cls_name);
        if (!cfg_component->comp_cls_name) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg_component->instance_name = g_string_new(NULL);
        if (!cfg_component->instance_name) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -389,7 +368,7 @@ struct bt_config_component *bt_config_component_create(
        /* Start with empty parameters */
        cfg_component->params = bt_value_map_create();
        if (!cfg_component->params) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -527,7 +506,7 @@ void destroy_glist_of_gstring(GList *list)
                return;
        }
 
-       for (at = list; at != NULL; at = g_list_next(at)) {
+       for (at = list; at; at = g_list_next(at)) {
                g_string_free(at->data, TRUE);
        }
 
@@ -575,7 +554,7 @@ GScanner *create_csv_identifiers_scanner(void)
 
        scanner = g_scanner_new(&scanner_config);
        if (!scanner) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
        }
 
        return scanner;
@@ -596,7 +575,7 @@ bt_value *names_from_arg(const char *arg)
 
        names = bt_value_array_create();
        if (!names) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -650,7 +629,7 @@ bt_value *names_from_arg(const char *arg)
                                        goto error;
                                }
                        } else {
-                               printf_err("Unknown name: `%s`\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Unknown name: `%s`.",
                                        identifier);
                                goto error;
                        }
@@ -667,7 +646,7 @@ bt_value *names_from_arg(const char *arg)
 
 end:
        if (found_none && found_all) {
-               printf_err("Only either `all` or `none` can be specified in the list given to the --names option, but not both.\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Only either `all` or `none` can be specified in the list given to the --names option, but not both.");
                goto error;
        }
        /*
@@ -707,7 +686,7 @@ bt_value *fields_from_arg(const char *arg)
 
        fields = bt_value_array_create();
        if (!fields) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -740,7 +719,7 @@ bt_value *fields_from_arg(const char *arg)
                                        goto error;
                                }
                        } else {
-                               printf_err("Unknown field: `%s`\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Unknown field: `%s`.",
                                        identifier);
                                goto error;
                        }
@@ -806,14 +785,14 @@ int insert_flat_params_from_array(GString *params_arg,
 
        tmpstr = g_string_new(NULL);
        if (!tmpstr) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
 
        default_value = g_string_new(NULL);
        if (!default_value) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -826,7 +805,7 @@ int insert_flat_params_from_array(GString *params_arg,
                bool is_default = false;
 
                if (!str_obj) {
-                       printf_err("Unexpected error\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("Unexpected error.");
                        ret = -1;
                        goto end;
                }
@@ -964,14 +943,14 @@ int add_run_cfg_comp_check_name(struct bt_config *cfg,
        int ret = 0;
 
        if (cfg_comp->instance_name->len == 0) {
-               printf_err("Found an unnamed component\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Found an unnamed component.");
                ret = -1;
                goto end;
        }
 
        if (bt_value_map_has_entry(instance_names,
                                   cfg_comp->instance_name->str)) {
-               printf_err("Duplicate component instance name:\n    %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("Duplicate component instance name:\n    %s",
                        cfg_comp->instance_name->str);
                ret = -1;
                goto end;
@@ -979,7 +958,7 @@ int add_run_cfg_comp_check_name(struct bt_config *cfg,
 
        if (bt_value_map_insert_entry(instance_names,
                        cfg_comp->instance_name->str, bt_value_null)) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -1010,7 +989,7 @@ int append_env_var_plugin_paths(bt_value *plugin_paths)
 
 end:
        if (ret) {
-               printf_err("Cannot append plugin paths from BABELTRACE_PLUGIN_PATH\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot append plugin paths from BABELTRACE_PLUGIN_PATH.");
        }
 
        return ret;
@@ -1035,7 +1014,7 @@ int append_home_and_system_plugin_paths(bt_value *plugin_paths,
                                free(home_plugin_dir);
 
                                if (ret) {
-                                       printf_err("Invalid home plugin path\n");
+                                       BT_CLI_LOGE_APPEND_CAUSE("Invalid home plugin path.");
                                        goto error;
                                }
                        }
@@ -1045,13 +1024,13 @@ int append_home_and_system_plugin_paths(bt_value *plugin_paths,
        if (!omit_system_plugin_path) {
                if (bt_config_append_plugin_paths(plugin_paths,
                                bt_common_get_system_plugin_path())) {
-                       printf_err("Invalid system plugin path\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("Invalid system plugin path.");
                        goto error;
                }
        }
        return 0;
 error:
-       printf_err("Cannot append home and system plugin paths\n");
+       BT_CLI_LOGE_APPEND_CAUSE("Cannot append home and system plugin paths.");
        return -1;
 }
 
@@ -1072,7 +1051,7 @@ struct bt_config *bt_config_base_create(enum bt_config_command command,
        /* Create config */
        cfg = g_new0(struct bt_config, 1);
        if (!cfg) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -1089,7 +1068,7 @@ struct bt_config *bt_config_base_create(enum bt_config_command command,
        } else {
                cfg->plugin_paths = bt_value_array_create();
                if (!cfg->plugin_paths) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
        }
@@ -1119,28 +1098,28 @@ struct bt_config *bt_config_run_create(
        cfg->cmd_data.run.sources = g_ptr_array_new_with_free_func(
                (GDestroyNotify) bt_object_put_ref);
        if (!cfg->cmd_data.run.sources) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg->cmd_data.run.filters = g_ptr_array_new_with_free_func(
                (GDestroyNotify) bt_object_put_ref);
        if (!cfg->cmd_data.run.filters) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg->cmd_data.run.sinks = g_ptr_array_new_with_free_func(
                (GDestroyNotify) bt_object_put_ref);
        if (!cfg->cmd_data.run.sinks) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg->cmd_data.run.connections = g_ptr_array_new_with_free_func(
                (GDestroyNotify) bt_config_connection_destroy);
        if (!cfg->cmd_data.run.connections) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -1219,7 +1198,7 @@ struct bt_config *bt_config_query_create(
 
        cfg->cmd_data.query.object = g_string_new(NULL);
        if (!cfg->cmd_data.query.object) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -1247,13 +1226,13 @@ struct bt_config *bt_config_print_ctf_metadata_create(
 
        cfg->cmd_data.print_ctf_metadata.path = g_string_new(NULL);
        if (!cfg->cmd_data.print_ctf_metadata.path) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg->cmd_data.print_ctf_metadata.output_path = g_string_new(NULL);
        if (!cfg->cmd_data.print_ctf_metadata.output_path) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -1281,14 +1260,14 @@ struct bt_config *bt_config_print_lttng_live_sessions_create(
 
        cfg->cmd_data.print_lttng_live_sessions.url = g_string_new(NULL);
        if (!cfg->cmd_data.print_lttng_live_sessions.url) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cfg->cmd_data.print_lttng_live_sessions.output_path =
                g_string_new(NULL);
        if (!cfg->cmd_data.print_lttng_live_sessions.output_path) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -1313,7 +1292,7 @@ int bt_config_append_plugin_paths_check_setuid_setgid(
        }
 
        if (bt_config_append_plugin_paths(plugin_paths, arg)) {
-               printf_err("Invalid --plugin-path option's argument:\n    %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("Invalid --plugin-path option's argument:\n    %s",
                        arg);
                ret = -1;
                goto end;
@@ -1434,7 +1413,7 @@ struct bt_config *bt_config_help_from_args(int argc, const char *argv[],
        pc = poptGetContext(NULL, argc, (const char **) argv,
                help_long_options, 0);
        if (!pc) {
-               printf_err("Cannot get popt context\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot get popt context.");
                goto error;
        }
 
@@ -1462,7 +1441,7 @@ struct bt_config *bt_config_help_from_args(int argc, const char *argv[],
                        BT_OBJECT_PUT_REF_AND_RESET(cfg);
                        goto end;
                default:
-                       printf_err("Unknown command-line option specified (option code %d)\n",
+                       BT_CLI_LOGE_APPEND_CAUSE("Unknown command-line option specified (option code %d).",
                                opt);
                        goto error;
                }
@@ -1473,7 +1452,7 @@ struct bt_config *bt_config_help_from_args(int argc, const char *argv[],
 
        /* Check for option parsing error */
        if (opt < -1) {
-               printf_err("While parsing command-line options, at option %s: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("While parsing command-line options, at option %s: `%s`.",
                        poptBadOption(pc, 0), poptStrerror(opt));
                goto error;
        }
@@ -1592,7 +1571,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
 
        error_str = g_string_new(NULL);
        if (!error_str) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -1607,7 +1586,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
        pc = poptGetContext(NULL, argc, (const char **) argv,
                query_long_options, 0);
        if (!pc) {
-               printf_err("Cannot get popt context\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot get popt context.");
                goto error;
        }
 
@@ -1634,7 +1613,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
                        bt_value_put_ref(params);
                        params = cli_value_from_arg(arg, error_str);
                        if (!params) {
-                               printf_err("Invalid format for --params option's argument:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid format for --params option's argument:\n    %s",
                                        error_str->str);
                                goto error;
                        }
@@ -1646,7 +1625,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
                        BT_OBJECT_PUT_REF_AND_RESET(cfg);
                        goto end;
                default:
-                       printf_err("Unknown command-line option specified (option code %d)\n",
+                       BT_CLI_LOGE_APPEND_CAUSE("Unknown command-line option specified (option code %d).",
                                opt);
                        goto error;
                }
@@ -1657,7 +1636,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
 
        /* Check for option parsing error */
        if (opt < -1) {
-               printf_err("While parsing command-line options, at option %s: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("While parsing command-line options, at option %s: `%s`.",
                        poptBadOption(pc, 0), poptStrerror(opt));
                goto error;
        }
@@ -1672,7 +1651,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
                        bt_config_component_from_arg(leftover,
                                default_log_level);
                if (!cfg->cmd_data.query.cfg_component) {
-                       printf_err("Invalid format for component class specification:\n    %s\n",
+                       BT_CLI_LOGE_APPEND_CAUSE("Invalid format for component class specification:\n    %s",
                                leftover);
                        goto error;
                }
@@ -1690,7 +1669,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
        leftover = poptGetArg(pc);
        if (leftover) {
                if (strlen(leftover) == 0) {
-                       printf_err("Invalid empty object\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("Invalid empty object.");
                        goto error;
                }
 
@@ -1704,7 +1683,7 @@ struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
 
        leftover = poptGetArg(pc);
        if (leftover) {
-               printf_err("Unexpected argument: %s\n", leftover);
+               BT_CLI_LOGE_APPEND_CAUSE("Unexpected argument: `%s`.", leftover);
                goto error;
        }
 
@@ -1800,7 +1779,7 @@ struct bt_config *bt_config_list_plugins_from_args(int argc, const char *argv[],
        pc = poptGetContext(NULL, argc, (const char **) argv,
                list_plugins_long_options, 0);
        if (!pc) {
-               printf_err("Cannot get popt context\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot get popt context.");
                goto error;
        }
 
@@ -1828,7 +1807,7 @@ struct bt_config *bt_config_list_plugins_from_args(int argc, const char *argv[],
                        BT_OBJECT_PUT_REF_AND_RESET(cfg);
                        goto end;
                default:
-                       printf_err("Unknown command-line option specified (option code %d)\n",
+                       BT_CLI_LOGE_APPEND_CAUSE("Unknown command-line option specified (option code %d).",
                                opt);
                        goto error;
                }
@@ -1839,14 +1818,14 @@ struct bt_config *bt_config_list_plugins_from_args(int argc, const char *argv[],
 
        /* Check for option parsing error */
        if (opt < -1) {
-               printf_err("While parsing command-line options, at option %s: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("While parsing command-line options, at option %s: %s",
                        poptBadOption(pc, 0), poptStrerror(opt));
                goto error;
        }
 
        leftover = poptGetArg(pc);
        if (leftover) {
-               printf_err("Unexpected argument: %s\n", leftover);
+               BT_CLI_LOGE_APPEND_CAUSE("Unexpected argument: `%s`.", leftover);
                goto error;
        }
 
@@ -1996,7 +1975,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
 
        error_str = g_string_new(NULL);
        if (!error_str) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -2016,19 +1995,19 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
        cfg->omit_home_plugin_path = force_omit_home_plugin_path;
        cur_base_params = bt_value_map_create();
        if (!cur_base_params) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        instance_names = bt_value_map_create();
        if (!instance_names) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        connection_args = bt_value_array_create();
        if (!connection_args) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -2041,7 +2020,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
        pc = poptGetContext(NULL, argc, (const char **) argv,
                run_long_options, 0);
        if (!pc) {
-               printf_err("Cannot get popt context\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot get popt context.");
                goto error;
        }
 
@@ -2080,7 +2059,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        cur_cfg_comp = bt_config_component_from_arg(arg,
                                default_log_level);
                        if (!cur_cfg_comp) {
-                               printf_err("Invalid format for --component option's argument:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid format for --component option's argument:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -2103,7 +2082,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        bt_value_put_ref(cur_cfg_comp->params);
                        if (bt_value_copy(cur_base_params,
                                        &cur_cfg_comp->params) < 0) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
@@ -2116,14 +2095,14 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        bt_value *params_to_set;
 
                        if (!cur_cfg_comp) {
-                               printf_err("Cannot add parameters to unavailable component:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Cannot add parameters to unavailable component:\n    %s",
                                        arg);
                                goto error;
                        }
 
                        params = cli_value_from_arg(arg, error_str);
                        if (!params) {
-                               printf_err("Invalid format for --params option's argument:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid format for --params option's argument:\n    %s",
                                        error_str->str);
                                goto error;
                        }
@@ -2132,7 +2111,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                                cur_cfg_comp->params, params, &params_to_set);
                        BT_VALUE_PUT_REF_AND_RESET(params);
                        if (extend_status != BT_VALUE_MAP_EXTEND_STATUS_OK) {
-                               printf_err("Cannot extend current component parameters with --params option's argument:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Cannot extend current component parameters with --params option's argument:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -2142,7 +2121,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                }
                case OPT_NAME:
                        if (!cur_cfg_comp) {
-                               printf_err("Cannot set the name of unavailable component:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Cannot set the name of unavailable component:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -2151,7 +2130,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        break;
                case OPT_LOG_LEVEL:
                        if (!cur_cfg_comp) {
-                               printf_err("Cannot set the log level of unavailable component:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Cannot set the log level of unavailable component:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -2159,7 +2138,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        cur_cfg_comp->log_level =
                                bt_log_get_level_from_string(arg);
                        if (cur_cfg_comp->log_level < 0) {
-                               printf_err("Invalid argument for --log-level option:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid argument for --log-level option:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -2169,7 +2148,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        bt_value *params = cli_value_from_arg(arg, error_str);
 
                        if (!params) {
-                               printf_err("Invalid format for --base-params option's argument:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid format for --base-params option's argument:\n    %s",
                                        error_str->str);
                                goto error;
                        }
@@ -2181,20 +2160,20 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        BT_VALUE_PUT_REF_AND_RESET(cur_base_params);
                        cur_base_params = bt_value_map_create();
                        if (!cur_base_params) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
                case OPT_CONNECT:
                        if (bt_value_array_append_string_element(
                                        connection_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
                case OPT_RETRY_DURATION:
                        if (retry_duration < 0) {
-                               printf_err("--retry-duration option's argument must be positive or 0: %ld\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("--retry-duration option's argument must be positive or 0: %ld",
                                        retry_duration);
                                goto error;
                        }
@@ -2208,7 +2187,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                        BT_OBJECT_PUT_REF_AND_RESET(cfg);
                        goto end;
                default:
-                       printf_err("Unknown command-line option specified (option code %d)\n",
+                       BT_CLI_LOGE_APPEND_CAUSE("Unknown command-line option specified (option code %d).",
                                opt);
                        goto error;
                }
@@ -2219,14 +2198,14 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
 
        /* Check for option parsing error */
        if (opt < -1) {
-               printf_err("While parsing command-line options, at option %s: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("While parsing command-line options, at option %s: %s",
                        poptBadOption(pc, 0), poptStrerror(opt));
                goto error;
        }
 
        /* This command does not accept leftover arguments */
        if (poptPeekArg(pc)) {
-               printf_err("Unexpected argument: %s\n", poptPeekArg(pc));
+               BT_CLI_LOGE_APPEND_CAUSE("Unexpected argument: %s", poptPeekArg(pc));
                goto error;
        }
 
@@ -2241,12 +2220,12 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
        }
 
        if (cfg->cmd_data.run.sources->len == 0) {
-               printf_err("Incomplete graph: no source component\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Incomplete graph: no source component.");
                goto error;
        }
 
        if (cfg->cmd_data.run.sinks->len == 0) {
-               printf_err("Incomplete graph: no sink component\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Incomplete graph: no sink component.");
                goto error;
        }
 
@@ -2258,7 +2237,7 @@ struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
                connection_args,
                error_buf, 256);
        if (ret) {
-               printf_err("Cannot creation connections:\n%s", error_buf);
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot creation connections:\n%s", error_buf);
                goto error;
        }
 
@@ -2298,7 +2277,7 @@ struct bt_config *bt_config_run_from_args_array(const bt_value *run_args,
 
        argv = calloc(argc, sizeof(*argv));
        if (!argv) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto end;
        }
 
@@ -2306,7 +2285,7 @@ struct bt_config *bt_config_run_from_args_array(const bt_value *run_args,
 
        len = bt_value_array_get_size(run_args);
        if (len < 0) {
-               printf_err("Invalid executable arguments\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Invalid executable arguments.");
                goto end;
        }
        for (i = 0; i < len; i++) {
@@ -2520,7 +2499,7 @@ GString *get_component_auto_name(const char *prefix,
        GString *auto_name = g_string_new(NULL);
 
        if (!auto_name) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto end;
        }
 
@@ -2540,8 +2519,13 @@ end:
 
 struct implicit_component_args {
        bool exists;
+
+       /* The component class name (e.g. src.ctf.fs). */
        GString *comp_arg;
+
+       /* The component instance name. */
        GString *name_arg;
+
        GString *params_arg;
        bt_value *extra_params;
 };
@@ -2570,7 +2554,7 @@ int assign_name_to_implicit_component(struct implicit_component_args *args,
 
        if (bt_value_map_insert_entry(existing_names, name->str,
                        bt_value_null)) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -2601,34 +2585,34 @@ int append_run_args_for_implicit_component(
        }
 
        if (bt_value_array_append_string_element(run_args, "--component")) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        if (bt_value_array_append_string_element(run_args, impl_args->comp_arg->str)) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        if (bt_value_array_append_string_element(run_args, "--name")) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        if (bt_value_array_append_string_element(run_args, impl_args->name_arg->str)) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        if (impl_args->params_arg->len > 0) {
                if (bt_value_array_append_string_element(run_args, "--params")) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
 
                if (bt_value_array_append_string_element(run_args,
                                impl_args->params_arg->str)) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
        }
@@ -2648,7 +2632,7 @@ int append_run_args_for_implicit_component(
                arg = bt_value_string_get(elem);
                ret = bt_value_array_append_string_element(run_args, arg);
                if (ret) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
        }
@@ -2662,6 +2646,8 @@ end:
        return ret;
 }
 
+/* Free the fields of a `struct implicit_component_args`. */
+
 static
 void finalize_implicit_component_args(struct implicit_component_args *args)
 {
@@ -2682,6 +2668,17 @@ void finalize_implicit_component_args(struct implicit_component_args *args)
        bt_value_put_ref(args->extra_params);
 }
 
+/* Destroy a dynamically-allocated `struct implicit_component_args`. */
+
+static
+void destroy_implicit_component_args(struct implicit_component_args *args)
+{
+       finalize_implicit_component_args(args);
+       g_free(args);
+}
+
+/* Initialize the fields of an already allocated `struct implicit_component_args`. */
+
 static
 int init_implicit_component_args(struct implicit_component_args *args,
                const char *comp_arg, bool exists)
@@ -2698,7 +2695,7 @@ int init_implicit_component_args(struct implicit_component_args *args,
                        !args->params_arg || !args->extra_params) {
                ret = -1;
                finalize_implicit_component_args(args);
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto end;
        }
 
@@ -2706,6 +2703,31 @@ end:
        return ret;
 }
 
+/* Dynamically allocate and initialize a `struct implicit_component_args`. */
+
+static
+struct implicit_component_args *create_implicit_component_args(
+               const char *comp_arg)
+{
+       struct implicit_component_args *args;
+       int status;
+
+       args = g_new(struct implicit_component_args, 1);
+       if (!args) {
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
+               goto end;
+       }
+
+       status = init_implicit_component_args(args, comp_arg, true);
+       if (status != 0) {
+               g_free(args);
+               args = NULL;
+       }
+
+end:
+       return args;
+}
+
 static
 void append_implicit_component_param(struct implicit_component_args *args,
        const char *key, const char *value)
@@ -2716,6 +2738,33 @@ void append_implicit_component_param(struct implicit_component_args *args,
        append_param_arg(args->params_arg, key, value);
 }
 
+/*
+ * Append the given parameter (`key=value`) to all component specifications
+ * in `implicit_comp_args` (an array of `struct implicit_component_args *`)
+ * which match `comp_arg`.
+ *
+ * Return the number of matching components.
+ */
+
+static
+int append_multiple_implicit_components_param(GPtrArray *implicit_comp_args,
+               const char *comp_arg, const char *key, const char *value)
+{
+       int i;
+       int n = 0;
+
+       for (i = 0; i < implicit_comp_args->len; i++) {
+               struct implicit_component_args *args = implicit_comp_args->pdata[i];
+
+               if (strcmp(args->comp_arg->str, comp_arg) == 0) {
+                       append_implicit_component_param(args, key, value);
+                       n++;
+               }
+       }
+
+       return n;
+}
+
 /* Escape value to make it suitable to use as a string parameter value. */
 static
 gchar *escape_string_value(const char *value)
@@ -2725,7 +2774,7 @@ gchar *escape_string_value(const char *value)
 
        ret = g_string_new(NULL);
        if (!ret) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto end;
        }
 
@@ -2815,7 +2864,7 @@ gchar *bt_value_to_cli_param_value(bt_value *value)
 
        buf = g_string_new(NULL);
        if (!buf) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -2850,7 +2899,7 @@ int append_parameter_to_args(bt_value *args, const char *key, bt_value *value)
        GString *parameter = NULL;
 
        if (bt_value_array_append_string_element(args, "--params")) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -2863,7 +2912,7 @@ int append_parameter_to_args(bt_value *args, const char *key, bt_value *value)
 
        parameter = g_string_new(NULL);
        if (!parameter) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -2871,7 +2920,7 @@ int append_parameter_to_args(bt_value *args, const char *key, bt_value *value)
        g_string_printf(parameter, "%s=%s", key, str_value);
 
        if (bt_value_array_append_string_element(args, parameter->str)) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -2899,7 +2948,7 @@ int append_string_parameter_to_args(bt_value *args, const char *key, const char
        str_value = bt_value_string_create_init(value);
 
        if (!str_value) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -2948,7 +2997,7 @@ int convert_append_name_param(enum bt_config_component_dest dest,
                         */
                        if (bt_value_map_has_entry(all_names,
                                                   cur_name->str)) {
-                               printf_err("Duplicate component instance name:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Duplicate component instance name:\n    %s",
                                        cur_name->str);
                                goto error;
                        }
@@ -2957,7 +3006,7 @@ int convert_append_name_param(enum bt_config_component_dest dest,
                }
 
                if (!name) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
 
@@ -2966,7 +3015,7 @@ int convert_append_name_param(enum bt_config_component_dest dest,
                 * all component names.
                 */
                if (bt_value_map_insert_entry(all_names, name->str, bt_value_null)) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
 
@@ -2975,12 +3024,12 @@ int convert_append_name_param(enum bt_config_component_dest dest,
                 */
                if (append_name_opt) {
                        if (bt_value_array_append_string_element(run_args, "--name")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, name->str)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                }
@@ -3025,7 +3074,7 @@ GString *escape_dot_colon(const char *input)
        const char *ch;
 
        if (!output) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto end;
        }
 
@@ -3056,14 +3105,14 @@ int append_connect_arg(bt_value *run_args,
        GString *arg = g_string_new(NULL);
 
        if (!e_upstream_name || !e_downstream_name || !arg) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
 
        ret = bt_value_array_append_string_element(run_args, "--connect");
        if (ret) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -3073,7 +3122,7 @@ int append_connect_arg(bt_value *run_args,
        g_string_append(arg, e_downstream_name->str);
        ret = bt_value_array_append_string_element(run_args, arg->str);
        if (ret) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                ret = -1;
                goto end;
        }
@@ -3113,7 +3162,7 @@ int convert_auto_connect(bt_value *run_args,
        BT_ASSERT(sink_names);
 
        /* Connect all sources to the first filter */
-       for (source_at = source_names; source_at != NULL; source_at = g_list_next(source_at)) {
+       for (source_at = source_names; source_at; source_at = g_list_next(source_at)) {
                GString *source_name = source_at->data;
                GString *filter_name = filter_at->data;
 
@@ -3128,7 +3177,7 @@ int convert_auto_connect(bt_value *run_args,
        filter_at = g_list_next(filter_at);
 
        /* Connect remaining filters */
-       for (; filter_at != NULL; filter_prev = filter_at, filter_at = g_list_next(filter_at)) {
+       for (; filter_at; filter_prev = filter_at, filter_at = g_list_next(filter_at)) {
                GString *filter_name = filter_at->data;
                GString *filter_prev_name = filter_prev->data;
 
@@ -3140,7 +3189,7 @@ int convert_auto_connect(bt_value *run_args,
        }
 
        /* Connect last filter to all sinks */
-       for (sink_at = sink_names; sink_at != NULL; sink_at = g_list_next(sink_at)) {
+       for (sink_at = sink_names; sink_at; sink_at = g_list_next(sink_at)) {
                GString *filter_name = filter_prev->data;
                GString *sink_name = sink_at->data;
 
@@ -3221,7 +3270,7 @@ int g_list_prepend_gstring(GList **list, const char *string)
        BT_ASSERT(list);
 
        if (!gs) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto end;
        }
 
@@ -3231,6 +3280,55 @@ end:
        return ret;
 }
 
+/*
+ * Create `struct implicit_component_args` structures for each of the source
+ * components we identified.  Add them to `component_args`.
+ */
+
+static
+void create_implicit_component_args_from_auto_discovered_sources(
+               const struct auto_source_discovery *auto_disc, GPtrArray *component_args)
+{
+       gchar *cc_name = NULL;
+       struct implicit_component_args *comp = NULL;
+       int status;
+       guint i, len;
+
+       len = auto_disc->results->len;
+
+       for (i = 0; i < len; i++) {
+               struct auto_source_discovery_result *res =
+                       g_ptr_array_index(auto_disc->results, i);
+
+               g_free(cc_name);
+               cc_name = g_strdup_printf("source.%s.%s", res->plugin_name, res->source_cc_name);
+               if (!cc_name) {
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
+                       goto end;
+               }
+
+               comp = create_implicit_component_args(cc_name);
+               if (!comp) {
+                       goto end;
+               }
+
+               status = append_parameter_to_args(comp->extra_params, "inputs", res->inputs);
+               if (status != 0) {
+                       goto end;
+               }
+
+               g_ptr_array_add(component_args, comp);
+               comp = NULL;
+       }
+
+end:
+       g_free(cc_name);
+
+       if (comp) {
+               destroy_implicit_component_args(comp);
+       }
+}
+
 /*
  * Creates a Babeltrace config object from the arguments of a convert
  * command.
@@ -3266,7 +3364,6 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
        GList *filter_names = NULL;
        GList *sink_names = NULL;
        bt_value *leftovers = NULL;
-       struct implicit_component_args implicit_ctf_input_args = { 0 };
        struct implicit_component_args implicit_ctf_output_args = { 0 };
        struct implicit_component_args implicit_lttng_live_args = { 0 };
        struct implicit_component_args implicit_dummy_args = { 0 };
@@ -3279,6 +3376,24 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
        size_t i;
        struct bt_common_lttng_live_url_parts lttng_live_url_parts = { 0 };
        char *output = NULL;
+       struct auto_source_discovery auto_disc = { NULL };
+       GString *auto_disc_comp_name = NULL;
+
+       /*
+        * Array of `struct implicit_component_args *` created for the sources
+        * we have auto-discovered.
+        */
+       GPtrArray *discovered_source_args = NULL;
+
+       /*
+        * If set, restrict automatic source discovery to this component class
+        * of this plugin.
+        */
+       const char *auto_source_discovery_restrict_plugin_name = NULL;
+       const char *auto_source_discovery_restrict_component_class_name = NULL;
+
+       gchar *ctf_fs_source_clock_class_offset_arg = NULL;
+       gchar *ctf_fs_source_clock_class_offset_ns_arg = NULL;
 
        (void) bt_value_copy(initial_plugin_paths, &plugin_paths);
 
@@ -3290,11 +3405,6 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                goto end;
        }
 
-       if (init_implicit_component_args(&implicit_ctf_input_args,
-                       "source.ctf.fs", false)) {
-               goto error;
-       }
-
        if (init_implicit_component_args(&implicit_ctf_output_args,
                        "sink.ctf.fs", false)) {
                goto error;
@@ -3332,25 +3442,25 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
        all_names = bt_value_map_create();
        if (!all_names) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        run_args = bt_value_array_create();
        if (!run_args) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cur_name = g_string_new(NULL);
        if (!cur_name) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
        cur_name_prefix = g_string_new(NULL);
        if (!cur_name_prefix) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -3361,7 +3471,24 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
        leftovers = bt_value_array_create();
        if (!leftovers) {
-               print_err_oom();
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
+               goto error;
+       }
+
+       if (auto_source_discovery_init(&auto_disc) != 0) {
+               goto error;
+       }
+
+       discovered_source_args =
+               g_ptr_array_new_with_free_func((GDestroyNotify) destroy_implicit_component_args);
+       if (!discovered_source_args) {
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
+               goto error;
+       }
+
+       auto_disc_comp_name = g_string_new(NULL);
+       if (!auto_disc_comp_name) {
+               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                goto error;
        }
 
@@ -3380,7 +3507,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
        pc = poptGetContext(NULL, argc, (const char **) argv,
                convert_long_options, 0);
        if (!pc) {
-               printf_err("Cannot get popt context\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot get popt context.");
                goto error;
        }
 
@@ -3411,7 +3538,8 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        plugin_comp_cls_names(arg, &name, &plugin_name,
                                &comp_cls_name, &type);
                        if (!plugin_name || !comp_cls_name) {
-                               printf_err("Invalid format for --component option's argument:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE(
+                                       "Invalid format for --component option's argument:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -3441,12 +3569,12 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
                        if (bt_value_array_append_string_element(run_args,
                                        "--component")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
@@ -3463,25 +3591,25 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                }
                case OPT_PARAMS:
                        if (cur_name_prefix->len == 0) {
-                               printf_err("No current component of which to set parameters:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("No current component of which to set parameters:\n    %s",
                                        arg);
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args,
                                        "--params")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
                case OPT_PATH:
                        if (cur_name_prefix->len == 0) {
-                               printf_err("No current component of which to set `path` parameter:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("No current component of which to set `path` parameter:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -3492,7 +3620,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        break;
                case OPT_URL:
                        if (cur_name_prefix->len == 0) {
-                               printf_err("No current component of which to set `url` parameter:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("No current component of which to set `url` parameter:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -3504,18 +3632,18 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        break;
                case OPT_NAME:
                        if (cur_name_prefix->len == 0) {
-                               printf_err("No current component to name:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("No current component to name:\n    %s",
                                        arg);
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, "--name")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
@@ -3523,18 +3651,18 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        break;
                case OPT_LOG_LEVEL:
                        if (cur_name_prefix->len == 0) {
-                               printf_err("No current component to assign a log level to:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("No current component to assign a log level to:\n    %s",
                                        arg);
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, "--log-level")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
@@ -3544,19 +3672,19 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
                        if (bt_value_array_append_string_element(run_args,
                                        "--omit-home-plugin-path")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
                case OPT_RETRY_DURATION:
                        if (bt_value_array_append_string_element(run_args,
                                        "--retry-duration")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
@@ -3565,7 +3693,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
                        if (bt_value_array_append_string_element(run_args,
                                        "--omit-system-plugin-path")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
@@ -3577,12 +3705,12 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
                        if (bt_value_array_append_string_element(run_args,
                                        "--plugin-path")) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
 
                        if (bt_value_array_append_string_element(run_args, arg)) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
@@ -3620,7 +3748,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        /* Ignore in this pass */
                        break;
                default:
-                       printf_err("Unknown command-line option specified (option code %d)\n",
+                       BT_CLI_LOGE_APPEND_CAUSE("Unknown command-line option specified (option code %d).",
                                opt);
                        goto error;
                }
@@ -3639,7 +3767,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
        /* Check for option parsing error */
        if (opt < -1) {
-               printf_err("While parsing command-line options, at option %s: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("While parsing command-line options, at option `%s`: %s.",
                        poptBadOption(pc, 0), poptStrerror(opt));
                goto error;
        }
@@ -3656,7 +3784,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
        pc = poptGetContext(NULL, argc, (const char **) argv,
                convert_long_options, 0);
        if (!pc) {
-               printf_err("Cannot get popt context\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot get popt context.");
                goto error;
        }
 
@@ -3709,7 +3837,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
                        ret = split_timerange(arg, &begin, &end);
                        if (ret) {
-                               printf_err("Invalid --timerange option's argument: expecting BEGIN,END or [BEGIN,END]:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid --timerange option's argument: expecting BEGIN,END or [BEGIN,END]:\n    %s",
                                        arg);
                                goto error;
                        }
@@ -3749,16 +3877,28 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        implicit_text_args.exists = true;
                        break;
                case OPT_CLOCK_OFFSET:
-                       implicit_ctf_input_args.exists = true;
-                       append_implicit_component_param(
-                                       &implicit_ctf_input_args,
-                                       "clock-class-offset-s", arg);
+                       if (ctf_fs_source_clock_class_offset_arg) {
+                               BT_CLI_LOGE_APPEND_CAUSE("Duplicate --clock-offset option\n");
+                               goto error;
+                       }
+
+                       ctf_fs_source_clock_class_offset_arg = g_strdup(arg);
+                       if (!ctf_fs_source_clock_class_offset_arg) {
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
+                               goto error;
+                       }
                        break;
                case OPT_CLOCK_OFFSET_NS:
-                       implicit_ctf_input_args.exists = true;
-                       append_implicit_component_param(
-                                       &implicit_ctf_input_args,
-                                       "clock-class-offset-ns", arg);
+                       if (ctf_fs_source_clock_class_offset_ns_arg) {
+                               BT_CLI_LOGE_APPEND_CAUSE("Duplicate --clock-offset-ns option\n");
+                               goto error;
+                       }
+
+                       ctf_fs_source_clock_class_offset_ns_arg = g_strdup(arg);
+                       if (!ctf_fs_source_clock_class_offset_ns_arg) {
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
+                               goto error;
+                       }
                        break;
                case OPT_CLOCK_SECONDS:
                        append_implicit_component_param(
@@ -3841,25 +3981,28 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        break;
                case OPT_INPUT_FORMAT:
                        if (got_input_format_opt) {
-                               printf_err("Duplicate --input-format option\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Duplicate --input-format option.");
                                goto error;
                        }
 
                        got_input_format_opt = true;
 
                        if (strcmp(arg, "ctf") == 0) {
-                               implicit_ctf_input_args.exists = true;
+                               auto_source_discovery_restrict_plugin_name = "ctf";
+                               auto_source_discovery_restrict_component_class_name = "fs";
                        } else if (strcmp(arg, "lttng-live") == 0) {
+                               auto_source_discovery_restrict_plugin_name = "ctf";
+                               auto_source_discovery_restrict_component_class_name = "lttng-live";
                                implicit_lttng_live_args.exists = true;
                        } else {
-                               printf_err("Unknown legacy input format:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Unknown legacy input format:\n    %s",
                                        arg);
                                goto error;
                        }
                        break;
                case OPT_OUTPUT_FORMAT:
                        if (got_output_format_opt) {
-                               printf_err("Duplicate --output-format option\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Duplicate --output-format option.");
                                goto error;
                        }
 
@@ -3874,26 +4017,26 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        } else if (strcmp(arg, "ctf-metadata") == 0) {
                                print_ctf_metadata = true;
                        } else {
-                               printf_err("Unknown legacy output format:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Unknown legacy output format:\n    %s",
                                        arg);
                                goto error;
                        }
                        break;
                case OPT_OUTPUT:
                        if (output) {
-                               printf_err("Duplicate --output option\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Duplicate --output option");
                                goto error;
                        }
 
                        output = strdup(arg);
                        if (!output) {
-                               print_err_oom();
+                               BT_CLI_LOGE_APPEND_CAUSE_OOM();
                                goto error;
                        }
                        break;
                case OPT_RUN_ARGS:
                        if (print_run_args_0) {
-                               printf_err("Cannot specify --run-args and --run-args-0\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Cannot specify --run-args and --run-args-0.");
                                goto error;
                        }
 
@@ -3901,7 +4044,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        break;
                case OPT_RUN_ARGS_0:
                        if (print_run_args) {
-                               printf_err("Cannot specify --run-args and --run-args-0\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Cannot specify --run-args and --run-args-0.");
                                goto error;
                        }
 
@@ -3933,7 +4076,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
        /* Check for option parsing error */
        if (opt < -1) {
-               printf_err("While parsing command-line options, at option %s: %s\n",
+               BT_CLI_LOGE_APPEND_CAUSE("While parsing command-line options, at option %s: %s",
                        poptBadOption(pc, 0), poptStrerror(opt));
                goto error;
        }
@@ -3963,7 +4106,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
        while ((leftover = poptGetArg(pc))) {
                if (bt_value_array_append_string_element(leftovers, leftover) !=
                                BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK) {
-                       print_err_oom();
+                       BT_CLI_LOGE_APPEND_CAUSE_OOM();
                        goto error;
                }
        }
@@ -3973,12 +4116,12 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                const bt_value *bt_val_leftover;
 
                if (bt_value_array_is_empty(leftovers)) {
-                       printf_err("--output-format=ctf-metadata specified without a path\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("--output-format=ctf-metadata specified without a path.");
                        goto error;
                }
 
                if (bt_value_array_get_size(leftovers) > 1) {
-                       printf_err("Too many paths specified for --output-format=ctf-metadata\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("Too many paths specified for --output-format=ctf-metadata.");
                        goto error;
                }
 
@@ -4008,7 +4151,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
         */
        if (implicit_ctf_output_args.exists) {
                if (!output) {
-                       printf_err("--output-format=ctf specified without --output (trace output path)\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("--output-format=ctf specified without --output (trace output path).");
                        goto error;
                }
 
@@ -4025,7 +4168,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                 * sink.ctf.fs implicit components.
                 */
                if (implicit_text_args.exists) {
-                       printf_err("Ambiguous --output option: --output-format=ctf specified but another option implies --output-format=text\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("Ambiguous --output option: --output-format=ctf specified but another option implies --output-format=text.");
                        goto error;
                }
        }
@@ -4060,7 +4203,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                        const bt_value *bt_val_leftover;
 
                        if (bt_value_array_get_size(leftovers) > 1) {
-                               printf_err("Too many URLs specified for --input-format=lttng-live\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Too many URLs specified for --input-format=lttng-live.");
                                goto error;
                        }
 
@@ -4069,7 +4212,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                                bt_common_parse_lttng_live_url(bt_value_string_get(bt_val_leftover),
                                        error_buf, sizeof(error_buf));
                        if (!lttng_live_url_parts.proto) {
-                               printf_err("Invalid LTTng live URL format: %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid LTTng live URL format: %s.",
                                        error_buf);
                                goto error;
                        }
@@ -4108,53 +4251,82 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
                                goto error;
                        }
                } else {
-                       /*
-                        * Create one source.ctf.fs component, pass it an array
-                        * with the leftovers.
-                        * Note that it still has to be named later.
-                        */
-                       implicit_ctf_input_args.exists = true;
-                       ret = append_parameter_to_args(implicit_ctf_input_args.extra_params,
-                                       "paths", leftovers);
-                       if (ret) {
+                       int status;
+
+                       status = auto_discover_source_components(plugin_paths, leftovers,
+                               auto_source_discovery_restrict_plugin_name,
+                               auto_source_discovery_restrict_component_class_name,
+                               *default_log_level >= 0 ? *default_log_level : cli_default_log_level,
+                               &auto_disc);
+
+                       if (status != 0) {
                                goto error;
                        }
+
+                       create_implicit_component_args_from_auto_discovered_sources(
+                               &auto_disc, discovered_source_args);
                }
        }
 
-       /*
-        * Ensure mutual exclusion between implicit `source.ctf.fs` and
-        * `source.ctf.lttng-live` components.
-        */
-       if (implicit_ctf_input_args.exists && implicit_lttng_live_args.exists) {
-               printf_err("Cannot create both implicit `%s` and `%s` components\n",
-                       implicit_ctf_input_args.comp_arg->str,
-                       implicit_lttng_live_args.comp_arg->str);
-               goto error;
+       /* If --clock-offset was given, apply it to any src.ctf.fs component. */
+       if (ctf_fs_source_clock_class_offset_arg) {
+               int n;
+
+               n = append_multiple_implicit_components_param(
+                       discovered_source_args, "source.ctf.fs", "clock-class-offset-s",
+                       ctf_fs_source_clock_class_offset_arg);
+
+               if (n == 0) {
+                       BT_CLI_LOGE_APPEND_CAUSE("--clock-offset specified, but no source.ctf.fs component instantiated.");
+                       goto error;
+               }
        }
 
-       /*
-        * If the implicit `source.ctf.fs` or `source.ctf.lttng-live`
-        * components exists, make sure there's at least one leftover
-        * (which is the path or URL).
-        */
-       if (implicit_ctf_input_args.exists && bt_value_array_is_empty(leftovers)) {
-               printf_err("Missing path for implicit `%s` component\n",
-                       implicit_ctf_input_args.comp_arg->str);
-               goto error;
+       /* If --clock-offset-ns was given, apply it to any src.ctf.fs component. */
+       if (ctf_fs_source_clock_class_offset_ns_arg) {
+               int n;
+
+               n = append_multiple_implicit_components_param(
+                       discovered_source_args, "source.ctf.fs", "clock-class-offset-ns",
+                       ctf_fs_source_clock_class_offset_ns_arg);
+
+               if (n == 0) {
+                       BT_CLI_LOGE_APPEND_CAUSE("--clock-offset-ns specified, but no source.ctf.fs component instantiated.");
+                       goto error;
+               }
        }
 
+       /*
+        * If the implicit `source.ctf.lttng-live` component exists, make sure
+        * there's at least one leftover (which is the URL).
+        */
        if (implicit_lttng_live_args.exists && bt_value_array_is_empty(leftovers)) {
-               printf_err("Missing URL for implicit `%s` component\n",
+               BT_CLI_LOGE_APPEND_CAUSE("Missing URL for implicit `%s` component.",
                        implicit_lttng_live_args.comp_arg->str);
                goto error;
        }
 
        /* Assign names to implicit components */
-       ret = assign_name_to_implicit_component(&implicit_ctf_input_args,
-               "source-ctf-fs", all_names, &source_names, true);
-       if (ret) {
-               goto error;
+       for (i = 0; i < discovered_source_args->len; i++) {
+               struct implicit_component_args *args;
+               int j;
+
+               args = discovered_source_args->pdata[i];
+
+               g_string_printf(auto_disc_comp_name, "auto-disc-%s", args->comp_arg->str);
+
+               /* Give it a name like `auto-disc-src-ctf-fs`. */
+               for (j = 0; j < auto_disc_comp_name->len; j++) {
+                       if (auto_disc_comp_name->str[j] == '.') {
+                               auto_disc_comp_name->str[j] = '-';
+                       }
+               }
+
+               ret = assign_name_to_implicit_component(args,
+                       auto_disc_comp_name->str, all_names, &source_names, true);
+               if (ret) {
+                       goto error;
+               }
        }
 
        ret = assign_name_to_implicit_component(&implicit_lttng_live_args,
@@ -4201,12 +4373,12 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
 
        /* Make sure there's at least one source and one sink */
        if (!source_names) {
-               printf_err("No source component\n");
+               BT_CLI_LOGE_APPEND_CAUSE("No source component.");
                goto error;
        }
 
        if (!sink_names) {
-               printf_err("No sink component\n");
+               BT_CLI_LOGE_APPEND_CAUSE("No sink component.");
                goto error;
        }
 
@@ -4240,9 +4412,14 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
         * Append the equivalent run arguments for the implicit
         * components.
         */
-       ret = append_run_args_for_implicit_component(&implicit_ctf_input_args, run_args);
-       if (ret) {
-               goto error;
+       for (i = 0; i < discovered_source_args->len; i++) {
+               struct implicit_component_args *args =
+                       discovered_source_args->pdata[i];
+
+               ret = append_run_args_for_implicit_component(args, run_args);
+               if (ret) {
+                       goto error;
+               }
        }
 
        ret = append_run_args_for_implicit_component(&implicit_lttng_live_args,
@@ -4291,7 +4468,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
        ret = convert_auto_connect(run_args, source_names, filter_names,
                        sink_names);
        if (ret) {
-               printf_err("Cannot auto-connect components\n");
+               BT_CLI_LOGE_APPEND_CAUSE("Cannot auto-connect components.");
                goto error;
        }
 
@@ -4302,7 +4479,7 @@ struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
         */
        if (print_run_args || print_run_args_0) {
                if (stream_intersection_mode) {
-                       printf_err("Cannot specify --stream-intersection with --run-args or --run-args-0\n");
+                       BT_CLI_LOGE_APPEND_CAUSE("Cannot specify --stream-intersection with --run-args or --run-args-0.");
                        goto error;
                }
 
@@ -4401,7 +4578,6 @@ end:
        destroy_glist_of_gstring(filter_names);
        destroy_glist_of_gstring(sink_names);
        bt_value_put_ref(leftovers);
-       finalize_implicit_component_args(&implicit_ctf_input_args);
        finalize_implicit_component_args(&implicit_ctf_output_args);
        finalize_implicit_component_args(&implicit_lttng_live_args);
        finalize_implicit_component_args(&implicit_dummy_args);
@@ -4411,6 +4587,19 @@ end:
        finalize_implicit_component_args(&implicit_trimmer_args);
        bt_value_put_ref(plugin_paths);
        bt_common_destroy_lttng_live_url_parts(&lttng_live_url_parts);
+       auto_source_discovery_fini(&auto_disc);
+
+       if (discovered_source_args) {
+               g_ptr_array_free(discovered_source_args, TRUE);
+       }
+
+       g_free(ctf_fs_source_clock_class_offset_arg);
+       g_free(ctf_fs_source_clock_class_offset_ns_arg);
+
+       if (auto_disc_comp_name) {
+               g_string_free(auto_disc_comp_name, TRUE);
+       }
+
        return cfg;
 }
 
@@ -4505,7 +4694,7 @@ struct bt_config *bt_config_cli_args_create(int argc, const char *argv[],
                } else if (strcmp(cur_arg, "--log-level") == 0 ||
                                strcmp(cur_arg, "-l") == 0) {
                        if (!next_arg) {
-                               printf_err("Missing log level value for --log-level option\n");
+                               BT_CLI_LOGE_APPEND_CAUSE("Missing log level value for --log-level option.");
                                *retcode = 1;
                                goto end;
                        }
@@ -4513,7 +4702,7 @@ struct bt_config *bt_config_cli_args_create(int argc, const char *argv[],
                        default_log_level =
                                bt_log_get_level_from_string(next_arg);
                        if (default_log_level < 0) {
-                               printf_err("Invalid argument for --log-level option:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid argument for --log-level option:\n    %s",
                                        next_arg);
                                *retcode = 1;
                                goto end;
@@ -4525,7 +4714,7 @@ struct bt_config *bt_config_cli_args_create(int argc, const char *argv[],
 
                        default_log_level = bt_log_get_level_from_string(arg);
                        if (default_log_level < 0) {
-                               printf_err("Invalid argument for --log-level option:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid argument for --log-level option:\n    %s",
                                        arg);
                                *retcode = 1;
                                goto end;
@@ -4535,7 +4724,7 @@ struct bt_config *bt_config_cli_args_create(int argc, const char *argv[],
 
                        default_log_level = bt_log_get_level_from_string(arg);
                        if (default_log_level < 0) {
-                               printf_err("Invalid argument for --log-level option:\n    %s\n",
+                               BT_CLI_LOGE_APPEND_CAUSE("Invalid argument for --log-level option:\n    %s",
                                        arg);
                                *retcode = 1;
                                goto end;
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