--- /dev/null
+/*
+ * Copyright (C) 2015 Julien Desfossez <jdesfossez@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <ctype.h>
+#include <popt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <common/mi-lttng.h>
+
+#include "../command.h"
+
+static char *opt_session_name;
+static char *session_name = NULL;
+
+static int metadata_regenerate(int argc, const char **argv);
+
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-metadata.1.h>
+;
+#endif
+
+enum {
+ OPT_HELP = 1,
+ OPT_LIST_OPTIONS,
+ OPT_LIST_COMMANDS,
+};
+
+static struct mi_writer *writer;
+
+static struct poptOption long_options[] = {
+ /* { longName, shortName, argInfo, argPtr, value, descrip, argDesc, } */
+ { "help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0, },
+ { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
+ { "list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, 0, 0, },
+ { "list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS},
+ { 0, 0, 0, 0, 0, 0, 0, },
+};
+
+static struct cmd_struct actions[] = {
+ { "regenerate", metadata_regenerate },
+ { NULL, NULL } /* Array closure */
+};
+
+/*
+ * Count and return the number of arguments in argv.
+ */
+static int count_arguments(const char **argv)
+{
+ int i = 0;
+
+ LTTNG_ASSERT(argv);
+
+ while (argv[i] != NULL) {
+ i++;
+ }
+
+ return i;
+}
+
+static int metadata_regenerate(int argc, const char **argv)
+{
+ int ret;
+
+ if (argc > 1) {
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+ ret = lttng_regenerate_metadata(session_name);
+ if (ret == 0) {
+ MSG("Metadata successfully regenerated for session %s", session_name);
+ } else {
+ ERR("%s", lttng_strerror(ret));
+ }
+
+end:
+ return ret;
+}
+
+static int handle_command(const char **argv)
+{
+ struct cmd_struct *cmd;
+ int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS;
+
+ if (argv == NULL) {
+ ERR("No action specified for metadata command.");
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ argc = count_arguments(argv);
+ LTTNG_ASSERT(argc >= 1);
+
+ cmd = &actions[i];
+ while (cmd->func != NULL) {
+ /* Find command */
+ if (strcmp(argv[0], cmd->name) == 0) {
+ if (lttng_opt_mi) {
+ /* Action element */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_metadata_action);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Name of the action */
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_name, argv[0]);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+ command_ret = cmd->func(argc, argv);
+ if (lttng_opt_mi) {
+ /* Close output and action element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+ goto end;
+ }
+
+ cmd = &actions[i++];
+ }
+
+ ret = CMD_UNDEFINED;
+
+end:
+ /* Overwrite ret if an error occurred in cmd->func() */
+ ret = command_ret ? command_ret : ret;
+ return ret;
+}
+
+/*
+ * Metadata command handling.
+ */
+int cmd_metadata(int argc, const char **argv)
+{
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
+ static poptContext pc;
+
+ if (argc < 1) {
+ SHOW_HELP();
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ pc = poptGetContext(NULL, argc, argv, long_options, 0);
+ poptReadDefaultConfig(pc, 0);
+
+ 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_metadata);
+ 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;
+ }
+ }
+
+ 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;
+ case OPT_LIST_COMMANDS:
+ list_commands(actions, stdout);
+ goto end;
+ default:
+ SHOW_HELP();
+ ret = CMD_UNDEFINED;
+ goto end;
+ }
+ }
+
+ if (!opt_session_name) {
+ session_name = get_session_name();
+ if (session_name == NULL) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ } else {
+ session_name = opt_session_name;
+ }
+
+ command_ret = handle_command(poptGetArgs(pc));
+ if (command_ret) {
+ success = 0;
+ }
+
+ if (lttng_opt_mi) {
+ /* Close output element */
+ ret = mi_lttng_writer_close_element(writer);
+ 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;
+ }
+
+ if (!opt_session_name) {
+ free(session_name);
+ }
+
+ /* Overwrite ret if an error occurred during handle_command() */
+ ret = command_ret ? command_ret : ret;
+
+ poptFreeContext(pc);
+ return ret;
+}
projects / lttng-tools.git / blobdiff