lttng: list valid condition / action names if missing or unknown

[lttng-tools.git] / src / bin / lttng / commands / add_trigger.c

diff --git a/src/bin/lttng/commands/add_trigger.c b/src/bin/lttng/commands/add_trigger.c
index 109daba974008515c35a21d49d08bda0244bbf34..4395c182b42db5f528dda42f65de46e48984304d 100644 (file)
--- a/src/bin/lttng/commands/add_trigger.c
+++ b/src/bin/lttng/commands/add_trigger.c
@@ -697,8 +697,9 @@ struct parse_event_rule_res parse_event_rule(int *argc, const char ***argv,
                enum parse_next_item_status status;
 
                status = parse_next_item(argpar_iter, &argpar_item,
-                       argc_offset, *argv, false, NULL);
-               if (status == PARSE_NEXT_ITEM_STATUS_ERROR) {
+                       argc_offset, *argv, false, NULL, NULL);
+               if (status == PARSE_NEXT_ITEM_STATUS_ERROR ||
+                               status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) {
                        goto error;
                } else if (status == PARSE_NEXT_ITEM_STATUS_END) {
                        break;
@@ -1414,9 +1415,22 @@ struct condition_descr condition_descrs[] = {
        { "event-rule-matches", handle_condition_event },
 };
 
+static
+void print_valid_condition_names(void)
+{
+       unsigned int i;
+
+       ERR("Valid condition names are:");
+
+       for (i = 0; i < ARRAY_SIZE(condition_descrs); ++i) {
+               ERR("  %s", condition_descrs[i].name);
+       }
+}
+
 static
 struct lttng_condition *parse_condition(const char *condition_name, int *argc,
-               const char ***argv, int argc_offset)
+               const char ***argv, int argc_offset, int orig_arg_index,
+               const char *orig_arg)
 {
        int i;
        struct lttng_condition *cond;
@@ -1430,7 +1444,9 @@ struct lttng_condition *parse_condition(const char *condition_name, int *argc,
        }
 
        if (!descr) {
-               ERR("Unknown condition name '%s'", condition_name);
+               ERR(WHILE_PARSING_ARG_N_ARG_FMT "Unknown condition name '%s'",
+                       orig_arg_index + 1, orig_arg, condition_name);
+               print_valid_condition_names();
                goto error;
        }
 
@@ -1545,9 +1561,10 @@ struct lttng_action *handle_action_notify(int *argc, const char ***argv,
                enum parse_next_item_status status;
 
                status = parse_next_item(argpar_iter, &argpar_item,
-                       argc_offset, *argv, false,
+                       argc_offset, *argv, false, NULL,
                        "While parsing `notify` action:");
-               if (status == PARSE_NEXT_ITEM_STATUS_ERROR) {
+               if (status == PARSE_NEXT_ITEM_STATUS_ERROR ||
+                               status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) {
                        goto error;
                } else if (status == PARSE_NEXT_ITEM_STATUS_END) {
                        break;
@@ -1651,9 +1668,10 @@ static struct lttng_action *handle_action_simple_session_with_policy(int *argc,
                enum parse_next_item_status status;
 
                status = parse_next_item(argpar_iter, &argpar_item, argc_offset,
-                       *argv, false,
+                       *argv, false, NULL,
                        "While parsing `%s` action:", action_name);
-               if (status == PARSE_NEXT_ITEM_STATUS_ERROR) {
+               if (status == PARSE_NEXT_ITEM_STATUS_ERROR ||
+                               status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) {
                        goto error;
                } else if (status == PARSE_NEXT_ITEM_STATUS_END) {
                        break;
@@ -1811,8 +1829,9 @@ struct lttng_action *handle_action_snapshot_session(int *argc,
                enum parse_next_item_status status;
 
                status = parse_next_item(argpar_iter, &argpar_item, argc_offset,
-                       *argv, false, "While parsing `snapshot` action:");
-               if (status == PARSE_NEXT_ITEM_STATUS_ERROR) {
+                       *argv, false, NULL, "While parsing `snapshot` action:");
+               if (status == PARSE_NEXT_ITEM_STATUS_ERROR ||
+                               status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) {
                        goto error;
                } else if (status == PARSE_NEXT_ITEM_STATUS_END) {
                        break;
@@ -2095,9 +2114,22 @@ struct action_descr action_descrs[] = {
        { "snapshot-session", handle_action_snapshot_session },
 };
 
+static
+void print_valid_action_names(void)
+{
+       unsigned int i;
+
+       ERR("Valid action names are:");
+
+       for (i = 0; i < ARRAY_SIZE(condition_descrs); ++i) {
+               ERR("  %s", action_descrs[i].name);
+       }
+}
+
 static
 struct lttng_action *parse_action(const char *action_name, int *argc,
-               const char ***argv, int argc_offset)
+               const char ***argv, int argc_offset, int orig_arg_index,
+               const char *orig_arg)
 {
        int i;
        struct lttng_action *action;
@@ -2111,7 +2143,9 @@ struct lttng_action *parse_action(const char *action_name, int *argc,
        }
 
        if (!descr) {
-               ERR("Unknown action name: %s", action_name);
+               ERR(WHILE_PARSING_ARG_N_ARG_FMT "Unknown action name '%s'",
+                       orig_arg_index + 1, orig_arg, action_name);
+               print_valid_action_names();
                goto error;
        }
 
@@ -2156,6 +2190,7 @@ int cmd_add_trigger(int argc, const char **argv)
        struct lttng_dynamic_pointer_array actions;
        struct argpar_iter *argpar_iter = NULL;
        const struct argpar_item *argpar_item = NULL;
+       const struct argpar_error *argpar_error = NULL;
        struct lttng_action *action_list = NULL;
        struct lttng_action *action = NULL;
        struct lttng_trigger *trigger = NULL;
@@ -2207,8 +2242,22 @@ int cmd_add_trigger(int argc, const char **argv)
                }
 
                status = parse_next_item(argpar_iter, &argpar_item,
-                       argc - my_argc, my_argv, true, NULL);
+                       argc - my_argc, my_argv, true, &argpar_error, NULL);
                if (status == PARSE_NEXT_ITEM_STATUS_ERROR) {
+
+                       if (argpar_error_type(argpar_error) ==
+                                       ARGPAR_ERROR_TYPE_MISSING_OPT_ARG) {
+                               int opt_id = argpar_error_opt_descr(argpar_error, NULL)->id;
+
+                               if (opt_id == OPT_CONDITION) {
+                                       print_valid_condition_names();
+                               } else if (opt_id == OPT_ACTION) {
+                                       print_valid_action_names();
+                               }
+                       }
+
+                       goto error;
+               } else if (status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) {
                        goto error;
                } else if (status == PARSE_NEXT_ITEM_STATUS_END) {
                        break;
@@ -2247,7 +2296,8 @@ int cmd_add_trigger(int argc, const char **argv)
                        }
 
                        condition = parse_condition(arg, &my_argc, &my_argv,
-                               argc - my_argc);
+                               argc - my_argc, argc - my_argc - ingested_args,
+                               my_argv[-ingested_args]);
                        if (!condition) {
                                /*
                                 * An error message was already printed by
@@ -2261,7 +2311,8 @@ int cmd_add_trigger(int argc, const char **argv)
                case OPT_ACTION:
                {
                        action = parse_action(arg, &my_argc, &my_argv,
-                               argc - my_argc);
+                               argc - my_argc,  argc - my_argc - ingested_args,
+                               my_argv[-ingested_args]);
                        if (!action) {
                                /*
                                 * An error message was already printed by
@@ -2426,6 +2477,7 @@ end:
        }
 
 cleanup:
+       argpar_error_destroy(argpar_error);
        argpar_iter_destroy(argpar_iter);
        argpar_item_destroy(argpar_item);
        lttng_dynamic_pointer_array_reset(&actions);