+++ /dev/null
-/*
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
- *
- * 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 <common/sessiond-comm/sessiond-comm.h>
-#include <common/mi-lttng.h>
-
-#include "../command.h"
-
-
-static char *opt_session_name;
-static struct mi_writer *writer;
-
-#ifdef LTTNG_EMBED_HELP
-static const char help_msg[] =
-#include <lttng-start.1.h>
-;
-#endif
-
-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},
- {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
- {0, 0, 0, 0, 0, 0, 0}
-};
-
-static int mi_print_session(char *session_name, int enabled)
-{
- int ret;
-
- /* Open session element */
- ret = mi_lttng_writer_open_element(writer, config_element_session);
- if (ret) {
- goto end;
- }
-
- /* Print session name element */
- ret = mi_lttng_writer_write_element_string(writer, config_element_name,
- session_name);
- if (ret) {
- goto end;
- }
-
- ret = mi_lttng_writer_write_element_bool(writer, config_element_enabled,
- enabled);
- if (ret) {
- goto end;
- }
-
- /* Close session element */
- ret = mi_lttng_writer_close_element(writer);
-
-end:
- return ret;
-}
-
-/*
- * start_tracing
- *
- * Start tracing for all trace of the session.
- */
-static int start_tracing(void)
-{
- int ret;
- char *session_name;
-
- if (opt_session_name == NULL) {
- session_name = get_session_name();
- if (session_name == NULL) {
- ret = CMD_ERROR;
- goto error;
- }
- } else {
- session_name = opt_session_name;
- }
-
- DBG("Starting tracing for session %s", session_name);
-
- ret = lttng_start_tracing(session_name);
- if (ret < 0) {
- switch (-ret) {
- case LTTNG_ERR_TRACE_ALREADY_STARTED:
- WARN("Tracing already started for session %s", session_name);
- break;
- default:
- ERR("%s", lttng_strerror(ret));
- break;
- }
- goto free_name;
- }
-
- ret = CMD_SUCCESS;
-
- MSG("Tracing started for session %s", session_name);
- if (lttng_opt_mi) {
- ret = mi_print_session(session_name, 1);
- if (ret) {
- ret = CMD_ERROR;
- goto free_name;
- }
- }
-
-free_name:
- if (opt_session_name == NULL) {
- free(session_name);
- }
-error:
- return ret;
-}
-
-/*
- * cmd_start
- *
- * The 'start <options>' first level command
- */
-int cmd_start(int argc, const char **argv)
-{
- int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
- static poptContext pc;
- const char *leftover = NULL;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- SHOW_HELP();
- goto end;
- case OPT_LIST_OPTIONS:
- list_cmd_options(stdout, long_options);
- goto end;
- default:
- ret = CMD_UNDEFINED;
- goto end;
- }
- }
-
- opt_session_name = (char*) poptGetArg(pc);
-
- leftover = poptGetArg(pc);
- if (leftover) {
- ERR("Unknown argument: %s", leftover);
- ret = CMD_ERROR;
- goto end;
- }
-
- /* Mi check */
- 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_start);
- 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;
- }
-
- /*
- * Open sessions element
- * For validation purpose
- */
- ret = mi_lttng_writer_open_element(writer,
- config_element_sessions);
- if (ret) {
- ret = CMD_ERROR;
- goto end;
- }
- }
-
- command_ret = start_tracing();
- if (command_ret) {
- success = 0;
- }
-
- /* Mi closing */
- if (lttng_opt_mi) {
- /* Close sessions and output 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;
- }
-
- /* Overwrite ret if an error occurred with start_tracing */
- ret = command_ret ? command_ret : ret;
- poptFreeContext(pc);
- return ret;
-}
projects / lttng-tools.git / blobdiff