+/*
+ * Copyright (C) 2015 - Julien Desfossez <jdesfossez@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _LGPL_SOURCE
+#include <assert.h>
+#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);
+
+enum {
+ OPT_HELP = 1,
+ OPT_LIST_OPTIONS,
+ OPT_LIST_COMMANDS,
+};
+
+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 */
+};
+
+/*
+ * usage
+ */
+static void usage(FILE *ofp)
+{
+ fprintf(ofp, "usage: lttng metadata [OPTION] ACTION\n");
+ fprintf(ofp, "\n");
+ fprintf(ofp, "Actions:\n");
+ fprintf(ofp, " regenerate\n");
+ fprintf(ofp, " Regenerate and overwrite the metadata of the session.\n");
+ fprintf(ofp, "Options:\n");
+ fprintf(ofp, " -h, --help Show this help.\n");
+ fprintf(ofp, " --list-options Simple listing of options.\n");
+ fprintf(ofp, " -s, --session NAME Apply to session name.\n");
+ fprintf(ofp, "\n");
+}
+
+/*
+ * Count and return the number of arguments in argv.
+ */
+static int count_arguments(const char **argv)
+{
+ int i = 0;
+
+ assert(argv);
+
+ while (argv[i] != NULL) {
+ i++;
+ }
+
+ return i;
+}
+
+static int metadata_regenerate(int argc, const char **argv)
+{
+ int ret;
+
+ ret = lttng_metadata_regenerate(session_name);
+ if (ret == 0) {
+ MSG("Metadata successfully regenerated for session %s", session_name);
+ }
+ 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) {
+ usage(stderr);
+ command_ret = CMD_ERROR;
+ goto end;
+ }
+
+ argc = count_arguments(argv);
+
+ cmd = &actions[i];
+ while (cmd->func != NULL) {
+ /* Find command */
+ if (strcmp(argv[0], cmd->name) == 0) {
+ command_ret = cmd->func(argc, argv);
+ 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;
+ static poptContext pc;
+
+ if (argc < 1) {
+ usage(stderr);
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ pc = poptGetContext(NULL, argc, argv, long_options, 0);
+ poptReadDefaultConfig(pc, 0);
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ case OPT_HELP:
+ usage(stdout);
+ 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:
+ usage(stderr);
+ 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) {
+ switch (-command_ret) {
+ default:
+ ERR("%s", lttng_strerror(command_ret));
+ break;
+ }
+ }
+
+end:
+ 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;
+}