+++ /dev/null
-/*
- * Copyright (C) 2021 Simon Marchi <simon.marchi@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#include "../command.h"
-#include "common/argpar/argpar.h"
-#include "common/mi-lttng.h"
-#include <lttng/lttng.h>
-#include <stdio.h>
-
-#ifdef LTTNG_EMBED_HELP
-static const char help_msg[] =
-#include <lttng-remove-trigger.1.h>
-;
-#endif
-
-enum {
- OPT_HELP,
- OPT_LIST_OPTIONS,
- OPT_OWNER_UID,
-};
-
-static const
-struct argpar_opt_descr remove_trigger_options[] = {
- { OPT_HELP, 'h', "help", false },
- { OPT_LIST_OPTIONS, '\0', "list-options", false },
- { OPT_OWNER_UID, '\0', "owner-uid", true },
- ARGPAR_OPT_DESCR_SENTINEL,
-};
-
-static
-bool assign_string(char **dest, const char *src, const char *opt_name)
-{
- bool ret;
-
- if (*dest) {
- ERR("Duplicate option '%s' given.", opt_name);
- goto error;
- }
-
- *dest = strdup(src);
- if (!*dest) {
- ERR("Failed to allocate '%s' string.", opt_name);
- goto error;
- }
-
- ret = true;
- goto end;
-
-error:
- ret = false;
-
-end:
- return ret;
-}
-
-int cmd_remove_trigger(int argc, const char **argv)
-{
- enum lttng_error_code ret_code;
- int ret;
- struct argpar_parse_ret argpar_parse_ret = {};
- const char *name = NULL;
- int i;
- struct lttng_triggers *triggers = NULL;
- unsigned int triggers_count;
- enum lttng_trigger_status trigger_status;
- const struct lttng_trigger *trigger_to_remove = NULL;
- char *owner_uid = NULL;
- long long uid;
- struct mi_writer *mi_writer = NULL;
-
- if (lttng_opt_mi) {
- mi_writer = mi_lttng_writer_create(
- fileno(stdout), lttng_opt_mi);
- if (!mi_writer) {
- ret = CMD_ERROR;
- goto error;
- }
-
- /* Open command element. */
- ret = mi_lttng_writer_command_open(mi_writer,
- mi_lttng_element_command_remove_trigger);
- if (ret) {
- ret = CMD_ERROR;
- goto error;
- }
-
- /* Open output element. */
- ret = mi_lttng_writer_open_element(
- mi_writer, mi_lttng_element_command_output);
- if (ret) {
- ret = CMD_ERROR;
- goto error;
- }
- }
-
- argpar_parse_ret = argpar_parse(argc - 1, argv + 1,
- remove_trigger_options, true);
- if (!argpar_parse_ret.items) {
- ERR("%s", argpar_parse_ret.error);
- goto error;
- }
-
- for (i = 0; i < argpar_parse_ret.items->n_items; i++) {
- const struct argpar_item *item =
- argpar_parse_ret.items->items[i];
-
- if (item->type == ARGPAR_ITEM_TYPE_OPT) {
- const struct argpar_item_opt *item_opt =
- (const struct argpar_item_opt *) item;
-
- switch (item_opt->descr->id) {
- case OPT_HELP:
- SHOW_HELP();
- ret = 0;
- goto end;
- case OPT_LIST_OPTIONS:
- list_cmd_options_argpar(stdout,
- remove_trigger_options);
- ret = 0;
- goto end;
- case OPT_OWNER_UID:
- {
- if (!assign_string(&owner_uid, item_opt->arg,
- "--owner-uid")) {
- goto error;
- }
- break;
- }
- default:
- abort();
- }
- } else {
- const struct argpar_item_non_opt *item_non_opt =
- (const struct argpar_item_non_opt *) item;
-
- if (name) {
- ERR("Unexpected argument '%s'", item_non_opt->arg);
- goto error;
- }
-
- name = item_non_opt->arg;
- }
- }
-
- if (!name) {
- ERR("Missing `name` argument.");
- goto error;
- }
-
- if (owner_uid) {
- char *end;
-
- errno = 0;
- uid = strtol(owner_uid, &end, 10);
- if (end == owner_uid || *end != '\0' || errno != 0) {
- ERR("Failed to parse `%s` as an integer.", owner_uid);
- }
- } else {
- uid = geteuid();
- }
-
- ret = lttng_list_triggers(&triggers);
- if (ret != LTTNG_OK) {
- ERR("Failed to get the list of triggers.");
- goto error;
- }
-
- trigger_status = lttng_triggers_get_count(triggers, &triggers_count);
- LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
-
- for (i = 0; i < triggers_count; i++) {
- const struct lttng_trigger *trigger;
- const char *trigger_name;
- uid_t trigger_uid;
-
- trigger = lttng_triggers_get_at_index(triggers, i);
- trigger_status = lttng_trigger_get_name(trigger, &trigger_name);
- switch (trigger_status) {
- case LTTNG_TRIGGER_STATUS_OK:
- break;
- case LTTNG_TRIGGER_STATUS_UNSET:
- /* Don't compare against anonymous triggers. */
- continue;
- default:
- abort();
- }
-
- trigger_status = lttng_trigger_get_owner_uid(
- trigger, &trigger_uid);
- LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
-
- if (trigger_uid == uid && strcmp(trigger_name, name) == 0) {
- trigger_to_remove = trigger;
- break;
- }
- }
-
- if (!trigger_to_remove) {
- ERR("Couldn't find trigger with name `%s`.", name);
- goto error;
- }
-
- ret = lttng_unregister_trigger(trigger_to_remove);
- if (ret != 0) {
- ERR("Failed to unregister trigger `%s`.", name);
- goto error;
- }
-
- if (lttng_opt_mi) {
- ret_code = lttng_trigger_mi_serialize(
- trigger_to_remove, mi_writer, NULL);
- if (ret_code != LTTNG_OK) {
- goto error;
- }
- }
- MSG("Removed trigger `%s`.", name);
-
- ret = 0;
- goto end;
-
-error:
- ret = 1;
-
-end:
- /* Mi closing. */
- if (lttng_opt_mi && mi_writer) {
- /* Close output element. */
- int mi_ret = mi_lttng_writer_close_element(mi_writer);
- if (mi_ret) {
- ret = 1;
- goto cleanup;
- }
-
- mi_ret = mi_lttng_writer_write_element_bool(mi_writer,
- mi_lttng_element_command_success, ret ? 0 : 1);
- if (mi_ret) {
- ret = 1;
- goto cleanup;
- }
-
- /* Command element close. */
- mi_ret = mi_lttng_writer_command_close(mi_writer);
- if (mi_ret) {
- ret = 1;
- goto cleanup;
- }
- }
-
-cleanup:
- argpar_parse_ret_fini(&argpar_parse_ret);
- lttng_triggers_destroy(triggers);
- free(owner_uid);
-
- if (mi_writer && mi_lttng_writer_destroy(mi_writer)) {
- /* Preserve original error code. */
- ret = ret ? ret : CMD_ERROR;
- }
- return ret;
-}
projects / lttng-tools.git / blobdiff