+++ /dev/null
-/*
- * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <popt.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <lttng/lttng.h>
-
-#include "../command.h"
-
-#include <common/mi-lttng.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/utils.h>
-
-static int opt_clear_all;
-
-#ifdef LTTNG_EMBED_HELP
-static const char help_msg[] =
-#include <lttng-clear.1.h>
-;
-#endif
-
-/* Mi writer */
-static struct mi_writer *writer;
-
-enum {
- OPT_HELP = 1,
- OPT_LIST_OPTIONS,
-};
-
-static struct poptOption long_options[] = {
- /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
- {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
- {"all", 'a', POPT_ARG_VAL, &opt_clear_all, 1, 0, 0},
- {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
- {0, 0, 0, 0, 0, 0, 0}
-};
-
-/*
- * clear session
- */
-static int clear_session(struct lttng_session *session)
-{
- enum lttng_clear_handle_status status =
- LTTNG_CLEAR_HANDLE_STATUS_OK;
- struct lttng_clear_handle *handle = NULL;
- enum lttng_error_code ret_code;
- bool printed_wait_msg = false;
- char *session_name = NULL;
- int ret;
-
- ret = lttng_clear_session(session->name, &handle);
- if (ret < 0) {
- ERR("%s", lttng_strerror(ret));
- goto error;
- }
-
- do {
- status = lttng_clear_handle_wait_for_completion(handle,
- DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US / USEC_PER_MSEC);
- switch (status) {
- case LTTNG_CLEAR_HANDLE_STATUS_TIMEOUT:
- if (!printed_wait_msg) {
- _MSG("Waiting for clear of session \"%s\"",
- session->name);
- printed_wait_msg = true;
- }
- _MSG(".");
- fflush(stdout);
- break;
- case LTTNG_CLEAR_HANDLE_STATUS_COMPLETED:
- break;
- default:
- ERR("Failed to wait for the completion of clear for session \"%s\"",
- session->name);
- ret = -1;
- goto error;
- }
- } while (status == LTTNG_CLEAR_HANDLE_STATUS_TIMEOUT);
-
- status = lttng_clear_handle_get_result(handle, &ret_code);
- if (status != LTTNG_CLEAR_HANDLE_STATUS_OK) {
- ERR("Failed to get the result of session clear");
- ret = -1;
- goto error;
- }
- if (ret_code != LTTNG_OK) {
- ret = -ret_code;
- goto error;
- }
-
- MSG("%sSession \"%s\" cleared", printed_wait_msg ? "\n" : "",
- session->name);
- printed_wait_msg = false;
-
- if (lttng_opt_mi) {
- ret = mi_lttng_session(writer, session, 0);
- if (ret) {
- ret = CMD_ERROR;
- goto error;
- }
- }
-
- ret = CMD_SUCCESS;
-error:
- if (printed_wait_msg) {
- MSG("");
- }
- lttng_clear_handle_destroy(handle);
- free(session_name);
- return ret;
-}
-
-/*
- * clear all sessions
- *
- * Call clear_session for each registered sessions
- */
-static int clear_all_sessions(struct lttng_session *sessions, int count)
-{
- int i, ret = CMD_SUCCESS;
-
- if (count == 0) {
- MSG("No session found, nothing to do.");
- } else if (count < 0) {
- ERR("%s", lttng_strerror(ret));
- goto error;
- }
-
- for (i = 0; i < count; i++) {
- ret = clear_session(&sessions[i]);
- if (ret < 0) {
- goto error;
- }
- }
-error:
- return ret;
-}
-
-/*
- * The 'clear <options>' first level command
- */
-int cmd_clear(int argc, const char **argv)
-{
- int opt;
- int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1;
- static poptContext pc;
- char *session_name = NULL;
- const char *leftover = NULL;
- bool free_session_name = false;
- struct lttng_session *sessions = NULL;
- int count;
- int found;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- SHOW_HELP();
- break;
- case OPT_LIST_OPTIONS:
- list_cmd_options(stdout, long_options);
- break;
- default:
- ret = CMD_UNDEFINED;
- break;
- }
- goto end;
- }
-
- /* Mi preparation */
- if (lttng_opt_mi) {
- writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
- if (!writer) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
-
- /* Open command element */
- ret = mi_lttng_writer_command_open(writer,
- mi_lttng_element_command_clear);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
-
- /* Open output element */
- ret = mi_lttng_writer_open_element(writer,
- mi_lttng_element_command_output);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
-
- /* For validation and semantic purpose we open a sessions element */
- ret = mi_lttng_sessions_open(writer);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
- }
-
- if (!opt_clear_all) {
- session_name = (char *) poptGetArg(pc);
- if (!session_name) {
- /* No session name specified, lookup default */
- session_name = get_session_name();
- if (session_name == NULL) {
- command_ret = CMD_ERROR;
- success = 0;
- goto mi_closing;
- }
- free_session_name = true;
- }
- } else {
- session_name = NULL;
- }
-
- leftover = poptGetArg(pc);
- if (leftover) {
- ERR("Unknown argument: %s", leftover);
- ret = CMD_ERROR;
- success = 0;
- goto mi_closing;
- }
-
- /* Recuperate all sessions for further operation */
- count = lttng_list_sessions(&sessions);
- if (count < 0) {
- ERR("%s", lttng_strerror(count));
- command_ret = CMD_ERROR;
- success = 0;
- goto mi_closing;
- }
-
- /* Ignore session name in case all sessions are to be cleaned */
- if (opt_clear_all) {
- command_ret = clear_all_sessions(sessions, count);
- if (command_ret) {
- ERR("%s", lttng_strerror(command_ret));
- success = 0;
- }
- } else {
- /* Find the corresponding lttng_session struct */
- found = 0;
- for (i = 0; i < count; i++) {
- if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
- found = 1;
- command_ret = clear_session(&sessions[i]);
- if (command_ret) {
- ERR("%s", lttng_strerror(command_ret));
- success = 0;
- }
- }
- }
-
- if (!found) {
- ERR("Session name %s not found", session_name);
- command_ret = LTTNG_ERR_SESS_NOT_FOUND;
- success = 0;
- goto mi_closing;
- }
- }
-
-mi_closing:
- /* Mi closing */
- if (lttng_opt_mi) {
- /* Close sessions and output element element */
- ret = mi_lttng_close_multi_element(writer, 2);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
-
- /* Success ? */
- ret = mi_lttng_writer_write_element_bool(writer,
- mi_lttng_element_command_success, success);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
-
- /* Command element close */
- ret = mi_lttng_writer_command_close(writer);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
- }
-end:
- /* Mi clean-up */
- if (writer && mi_lttng_writer_destroy(writer)) {
- /* Preserve original error code */
- ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
- }
-
- free(sessions);
- if (free_session_name) {
- free(session_name);
- }
-
- /* Overwrite ret if an error occurred during clear_session/all */
- ret = command_ret ? command_ret : ret;
-
- poptFreeContext(pc);
- return ret;
-}
projects / lttng-tools.git / blobdiff