[lttng-tools.git] / src / bin / lttng / commands / snapshot.c

/*
 * Copyright (C) 2013 - David Goulet <dgoulet@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 _GNU_SOURCE
#include <assert.h>
#include <inttypes.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <assert.h>

#include <common/utils.h>
#include <common/mi-lttng.h>
#include <lttng/snapshot.h>

#include "../command.h"

static const char *opt_session_name;
static const char *opt_output_name;
static const char *opt_data_url;
static const char *opt_ctrl_url;
static const char *current_session_name;
static uint64_t opt_max_size;

/* Stub for the cmd struct actions. */
static int cmd_add_output(int argc, const char **argv);
static int cmd_del_output(int argc, const char **argv);
static int cmd_list_output(int argc, const char **argv);
static int cmd_record(int argc, const char **argv);

static const char *indent4 = "    ";

enum {
	OPT_HELP = 1,
	OPT_LIST_OPTIONS,
	OPT_MAX_SIZE,
	OPT_LIST_COMMANDS,
};

static struct mi_writer *writer;

static struct poptOption snapshot_opts[] = {
	/* 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},
	{"ctrl-url",     'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0},
	{"data-url",     'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0},
	{"name",         'n', POPT_ARG_STRING, &opt_output_name, 0, 0, 0},
	{"max-size",     'm', POPT_ARG_STRING, 0, OPT_MAX_SIZE, 0, 0},
	{"list-options",   0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{"list-commands",  0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS},
	{0, 0, 0, 0, 0, 0, 0}
};

static struct cmd_struct actions[] = {
	{ "add-output", cmd_add_output },
	{ "del-output", cmd_del_output },
	{ "list-output", cmd_list_output },
	{ "record", cmd_record },
	{ NULL, NULL }	/* Array closure */
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng snapshot [OPTION] ACTION\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Actions:\n");
	fprintf(ofp, "   add-output [-m <SIZE>] [-s <NAME>] [-n <NAME>] <URL> | -C <URL> -D <URL>\n");
	fprintf(ofp, "      Setup and add an snapshot output for a session.\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "   del-output ID | NAME [-s <NAME>]\n");
	fprintf(ofp, "      Delete an output for a session using the ID.\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "   list-output [-s <NAME>]\n");
	fprintf(ofp, "      List the output of a session.\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "   record [-m <SIZE>] [-s <NAME>] [-n <NAME>] [<URL> | -C <URL> -D <URL>]\n");
	fprintf(ofp, "      Snapshot a session's buffer(s) for all domains. If an URL is\n");
	fprintf(ofp, "      specified, it is used instead of a previously added output.\n");
	fprintf(ofp, "      Specifying only a name or/a size will override the current output value.\n");
	fprintf(ofp, "      For instance, you can record a snapshot with a custom maximum size\n");
	fprintf(ofp, "      or with a different name.\n");
	fprintf(ofp, "\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, --name NAME      Name of the output or snapshot\n");
	fprintf(ofp, "  -m, --max-size SIZE  Maximum bytes size of the snapshot {+k,+M,+G}\n");
	fprintf(ofp, "  -C, --ctrl-url URL   Set control path URL. (Must use -D also)\n");
	fprintf(ofp, "  -D, --data-url URL   Set data path URL. (Must use -C also)\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;
}

/*
 * Create a snapshot output object from arguments using the given URL.
 *
 * Return a newly allocated object or NULL on error.
 */
static struct lttng_snapshot_output *create_output_from_args(const char *url)
{
	int ret = 0;
	struct lttng_snapshot_output *output = NULL;

	output = lttng_snapshot_output_create();
	if (!output) {
		goto error_create;
	}

	if (url) {
		ret = lttng_snapshot_output_set_ctrl_url(url, output);
		if (ret < 0) {
			goto error;
		}
	} else if (opt_ctrl_url) {
		ret = lttng_snapshot_output_set_ctrl_url(opt_ctrl_url, output);
		if (ret < 0) {
			goto error;
		}
	}

	if (opt_data_url) {
		ret = lttng_snapshot_output_set_data_url(opt_data_url, output);
		if (ret < 0) {
			goto error;
		}
	}

	if (opt_max_size) {
		ret = lttng_snapshot_output_set_size(opt_max_size, output);
		if (ret < 0) {
			goto error;
		}
	}

	if (opt_output_name) {
		ret = lttng_snapshot_output_set_name(opt_output_name, output);
		if (ret < 0) {
			goto error;
		}
	}

	return output;

error:
	lttng_snapshot_output_destroy(output);
error_create:
	return NULL;
}

static int mi_list_output(void)
{
	int ret;
	struct lttng_snapshot_output *s_iter;
	struct lttng_snapshot_output_list *list;

	assert(writer);

	ret = lttng_snapshot_list_output(current_session_name, &list);
	if (ret < 0) {
		goto error;
	}

	ret = mi_lttng_snapshot_output_session_name(writer, current_session_name);
	if (ret) {
		ret = CMD_ERROR;
		goto end;
	}

	while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) {
		ret = mi_lttng_snapshot_list_output(writer, s_iter);
		if (ret) {
			ret = CMD_ERROR;
			goto end;
		}
	}


	/* Close snapshot snapshots element */
	ret = mi_lttng_writer_close_element(writer);
	if (ret) {
		ret = CMD_ERROR;
		goto end;
	}

	/* Close snapshot session element */
	ret = mi_lttng_writer_close_element(writer);
	if (ret) {
		ret = CMD_ERROR;
	}
end:
	lttng_snapshot_output_list_destroy(list);
error:
	return ret;
}

static int list_output(void)
{
	int ret, output_seen = 0;
	struct lttng_snapshot_output *s_iter;
	struct lttng_snapshot_output_list *list;

	ret = lttng_snapshot_list_output(current_session_name, &list);
	if (ret < 0) {
		goto error;
	}

	MSG("Snapshot output list for session %s", current_session_name);

	while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) {
		MSG("%s[%" PRIu32 "] %s: %s (max-size: %" PRId64 ")", indent4,
				lttng_snapshot_output_get_id(s_iter),
				lttng_snapshot_output_get_name(s_iter),
				lttng_snapshot_output_get_ctrl_url(s_iter),
				lttng_snapshot_output_get_maxsize(s_iter));
		output_seen = 1;
	}

	lttng_snapshot_output_list_destroy(list);

	if (!output_seen) {
		MSG("%sNone", indent4);
	}

error:
	return ret;
}

/*
 * Delete output by ID (machine interface version).
 */
static int mi_del_output(uint32_t id, const char *name)
{
	int ret;
	struct lttng_snapshot_output *output = NULL;

	assert(writer);

	output = lttng_snapshot_output_create();
	if (!output) {
		ret = CMD_FATAL;
		goto error;
	}

	if (name) {
		ret = lttng_snapshot_output_set_name(name, output);
	} else if (id != UINT32_MAX) {
		ret = lttng_snapshot_output_set_id(id, output);
	} else {
		ret = CMD_ERROR;
		goto error;
	}
	if (ret < 0) {
		ret = CMD_FATAL;
		goto error;
	}

	ret = lttng_snapshot_del_output(current_session_name, output);
	if (ret < 0) {
		goto error;
	}

	ret = mi_lttng_snapshot_del_output(writer, id, name, current_session_name);
	if (ret) {
		ret = CMD_ERROR;
	}

error:
	lttng_snapshot_output_destroy(output);
	return ret;
}

/*
 * Delete output by ID.
 */
static int del_output(uint32_t id, const char *name)
{
	int ret;
	struct lttng_snapshot_output *output = NULL;

	output = lttng_snapshot_output_create();
	if (!output) {
		ret = CMD_FATAL;
		goto error;
	}

	if (name) {
		ret = lttng_snapshot_output_set_name(name, output);
	} else if (id != UINT32_MAX) {
		ret = lttng_snapshot_output_set_id(id, output);
	} else {
		ret = CMD_ERROR;
		goto error;
	}
	if (ret < 0) {
		ret = CMD_FATAL;
		goto error;
	}

	ret = lttng_snapshot_del_output(current_session_name, output);
	if (ret < 0) {
		goto error;
	}

	if (id != UINT32_MAX) {
		MSG("Snapshot output id %" PRIu32 " successfully deleted for session %s",
				id, current_session_name);
	} else {
		MSG("Snapshot output %s successfully deleted for session %s",
				name, current_session_name);
	}

error:
	lttng_snapshot_output_destroy(output);
	return ret;
}

/*
 * Add output from the user URL (machine interface).
 */
static int mi_add_output(const char *url)
{
	int ret;
	struct lttng_snapshot_output *output = NULL;
	char name[NAME_MAX];
	const char *n_ptr;

	if (!url && (!opt_data_url || !opt_ctrl_url)) {
		ret = CMD_ERROR;
		goto error;
	}

	output = create_output_from_args(url);
	if (!output) {
		ret = CMD_FATAL;
		goto error;
	}

	/* This call, if successful, populates the id of the output object. */
	ret = lttng_snapshot_add_output(current_session_name, output);
	if (ret < 0) {
		goto error;
	}

	n_ptr = lttng_snapshot_output_get_name(output);
	if (*n_ptr == '\0') {
		int pret;
		pret = snprintf(name, sizeof(name), DEFAULT_SNAPSHOT_NAME "-%" PRIu32,
				lttng_snapshot_output_get_id(output));
		if (pret < 0) {
			PERROR("snprintf add output name");
		}
		n_ptr = name;
	}

	ret = mi_lttng_snapshot_add_output(writer, current_session_name, n_ptr,
			output);
	if (ret) {
		ret = CMD_ERROR;
	}

error:
	lttng_snapshot_output_destroy(output);
	return ret;
}

/*
 * Add output from the user URL.
 */
static int add_output(const char *url)
{
	int ret;
	struct lttng_snapshot_output *output = NULL;
	char name[NAME_MAX];
	const char *n_ptr;

	if (!url && (!opt_data_url || !opt_ctrl_url)) {
		ret = CMD_ERROR;
		goto error;
	}

	output = create_output_from_args(url);
	if (!output) {
		ret = CMD_FATAL;
		goto error;
	}

	/* This call, if successful, populates the id of the output object. */
	ret = lttng_snapshot_add_output(current_session_name, output);
	if (ret < 0) {
		goto error;
	}

	n_ptr = lttng_snapshot_output_get_name(output);
	if (*n_ptr == '\0') {
		int pret;
		pret = snprintf(name, sizeof(name), DEFAULT_SNAPSHOT_NAME "-%" PRIu32,
				lttng_snapshot_output_get_id(output));
		if (pret < 0) {
			PERROR("snprintf add output name");
		}
		n_ptr = name;
	}

	MSG("Snapshot output successfully added for session %s",
			current_session_name);
	MSG("  [%" PRIu32 "] %s: %s (max-size: %" PRId64 ")",
			lttng_snapshot_output_get_id(output), n_ptr,
			lttng_snapshot_output_get_ctrl_url(output),
			lttng_snapshot_output_get_maxsize(output));
error:
	lttng_snapshot_output_destroy(output);
	return ret;
}

static int cmd_add_output(int argc, const char **argv)
{
	int ret;

	if (argc < 2 && (!opt_data_url || !opt_ctrl_url)) {
		usage(stderr);
		ret = CMD_ERROR;
		goto end;
	}

	if (lttng_opt_mi) {
		ret = mi_add_output(argv[1]);
	} else {
		ret = add_output(argv[1]);
	}

end:
	return ret;
}

static int cmd_del_output(int argc, const char **argv)
{
	int ret;
	char *name;
	long id;

	if (argc < 2) {
		usage(stderr);
		ret = CMD_ERROR;
		goto end;
	}

	errno = 0;
	id = strtol(argv[1], &name, 10);
	if (id == 0 && errno == 0) {
		if (lttng_opt_mi) {
			ret = mi_del_output(UINT32_MAX, name);
		} else {
			ret = del_output(UINT32_MAX, name);
		}
	} else if (errno == 0 && *name == '\0') {
		if (lttng_opt_mi) {
			ret = mi_del_output(id, NULL);
		} else {
			ret = del_output(id, NULL);
		}
	} else {
		ERR("Argument %s not recognized", argv[1]);
		ret = -1;
		goto end;
	}

end:
	return ret;
}

static int cmd_list_output(int argc, const char **argv)
{
	int ret;

	if (lttng_opt_mi) {
		ret = mi_list_output();
	} else {
		ret = list_output();
	}

	return ret;
}

/*
 * Do a snapshot record with the URL if one is given (machine interface).
 */
static int mi_record(const char *url)
{
	int ret;
	struct lttng_snapshot_output *output = NULL;

	output = create_output_from_args(url);
	if (!output) {
		ret = CMD_FATAL;
		goto error;
	}

	ret = lttng_snapshot_record(current_session_name, output, 0);
	if (ret < 0) {
		ret = CMD_ERROR;
		goto error;
	}

	ret = mi_lttng_snapshot_record(writer, current_session_name, url,
			opt_ctrl_url, opt_data_url);
	if (ret) {
		ret = CMD_ERROR;
	}

error:
	lttng_snapshot_output_destroy(output);
	return ret;
}

/*
 * Do a snapshot record with the URL if one is given.
 */
static int record(const char *url)
{
	int ret;
	struct lttng_snapshot_output *output = NULL;

	output = create_output_from_args(url);
	if (!output) {
		ret = CMD_FATAL;
		goto error;
	}

	ret = lttng_snapshot_record(current_session_name, output, 0);
	if (ret < 0) {
		if (ret == -LTTNG_ERR_MAX_SIZE_INVALID) {
			ERR("The minimum size of a snapshot is computed by multiplying "
					"the total amount of streams with the largest subbuffer "
					"in the session.");
		}
		goto error;
	}

	MSG("Snapshot recorded successfully for session %s", current_session_name);

	if (url) {
		MSG("Snapshot written at: %s", url);
	} else if (opt_ctrl_url) {
		MSG("Snapshot written to ctrl: %s, data: %s", opt_ctrl_url,
				opt_data_url);
	}

error:
	lttng_snapshot_output_destroy(output);
	return ret;
}

static int cmd_record(int argc, const char **argv)
{
	int ret;

	if (argc == 2) {
		/* With a given URL */
		if (lttng_opt_mi) {
			ret = mi_record(argv[1]);
		} else {
			ret = record(argv[1]);
		}
	} else {
		if (lttng_opt_mi) {
			ret = mi_record(NULL);
		} else {
			ret = record(NULL);
		}
	}

	return ret;
}

static int handle_command(const char **argv)
{
	int ret = CMD_SUCCESS, i = 0, argc, command_ret =  CMD_SUCCESS;
	struct cmd_struct *cmd;

	if (argv == NULL || (!opt_ctrl_url && opt_data_url) ||
			(opt_ctrl_url && !opt_data_url)) {
		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) {
			if (lttng_opt_mi) {
				/* Action element */
				ret = mi_lttng_writer_open_element(writer,
						mi_lttng_element_command_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;
				}

				/* Open output element */
				ret = mi_lttng_writer_open_element(writer,
						mi_lttng_element_command_output);
				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_close_multi_element(writer, 2);
				if (ret) {
					ret = CMD_ERROR;
					goto end;
				}
			}
			goto end;
		}
		i++;
		cmd = &actions[i];
	}

	ret = CMD_UNDEFINED;

end:
	/* Overwrite ret if an error occurred in cmd->func() */
	ret = command_ret ? command_ret : ret;
	return ret;
}
/*
 * The 'snapshot <cmd> <options>' first level command
 */
int cmd_snapshot(int argc, const char **argv)
{
	int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
	char *session_name = NULL;
	static poptContext pc;

	pc = poptGetContext(NULL, argc, argv, snapshot_opts, 0);
	poptReadDefaultConfig(pc, 0);

	/* 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_snapshot);
		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:
			usage(stdout);
			goto end;
		case OPT_LIST_OPTIONS:
			list_cmd_options(stdout, snapshot_opts);
			goto end;
		case OPT_LIST_COMMANDS:
			list_commands(actions, stdout);
			goto end;
		case OPT_MAX_SIZE:
		{
			uint64_t val;
			const char *opt = poptGetOptArg(pc);

			if (utils_parse_size_suffix((char *) opt, &val) < 0) {
				ERR("Unable to handle max-size value %s", opt);
				ret = CMD_ERROR;
				goto end;
			}

			opt_max_size = val;

			break;
		}
		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;
		}
		current_session_name = session_name;
	} else {
		current_session_name = opt_session_name;
	}

	command_ret = handle_command(poptGetArgs(pc));
	if (command_ret) {
		switch (-command_ret) {
		case LTTNG_ERR_EPERM:
			ERR("The session needs to be set in no output mode (--no-output)");
			break;
		case LTTNG_ERR_SNAPSHOT_NODATA:
			WARN("%s", lttng_strerror(command_ret));
			break;
		default:
			ERR("%s", lttng_strerror(command_ret));
			break;
		}
		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 occured during handle_command */
	ret = command_ret ? command_ret : ret;
	poptFreeContext(pc);
	return ret;
}
Commit	Line	Data
57f272ed DG	1	/*
	2	* Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#define _GNU_SOURCE
	19	#include <assert.h>
	20	#include <inttypes.h>
	21	#include <popt.h>
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <sys/stat.h>
	26	#include <sys/types.h>
	27	#include <unistd.h>
50534d6f	28	#include <assert.h>
57f272ed	29
a8f307d8	30	#include <common/utils.h>
50534d6f	31	#include <common/mi-lttng.h>
57f272ed DG	32	#include <lttng/snapshot.h>
	33
	34	#include "../command.h"
	35
	36	static const char *opt_session_name;
	37	static const char *opt_output_name;
	38	static const char *opt_data_url;
	39	static const char *opt_ctrl_url;
	40	static const char *current_session_name;
	41	static uint64_t opt_max_size;
	42
	43	/* Stub for the cmd struct actions. */
	44	static int cmd_add_output(int argc, const char **argv);
	45	static int cmd_del_output(int argc, const char **argv);
	46	static int cmd_list_output(int argc, const char **argv);
	47	static int cmd_record(int argc, const char **argv);
	48
	49	static const char *indent4 = " ";
	50
	51	enum {
	52	OPT_HELP = 1,
	53	OPT_LIST_OPTIONS,
	54	OPT_MAX_SIZE,
3c9bd23c	55	OPT_LIST_COMMANDS,
57f272ed DG	56	};
57f272ed DG	57
50534d6f JRJ	58	static struct mi_writer *writer;
50534d6f JRJ	59
57f272ed DG	60	static struct poptOption snapshot_opts[] = {
	61	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	62	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
	63	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
	64	{"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0},
	65	{"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0},
	66	{"name", 'n', POPT_ARG_STRING, &opt_output_name, 0, 0, 0},
a8f307d8	67	{"max-size", 'm', POPT_ARG_STRING, 0, OPT_MAX_SIZE, 0, 0},
57f272ed	68	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
3c9bd23c	69	{"list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS},
57f272ed DG	70	{0, 0, 0, 0, 0, 0, 0}
	71	};
	72
	73	static struct cmd_struct actions[] = {
	74	{ "add-output", cmd_add_output },
	75	{ "del-output", cmd_del_output },
	76	{ "list-output", cmd_list_output },
	77	{ "record", cmd_record },
	78	{ NULL, NULL } /* Array closure */
	79	};
	80
	81	/*
	82	* usage
	83	*/
	84	static void usage(FILE *ofp)
	85	{
8df3bfe9	86	fprintf(ofp, "usage: lttng snapshot [OPTION] ACTION\n");
57f272ed DG	87	fprintf(ofp, "\n");
	88	fprintf(ofp, "Actions:\n");
	89	fprintf(ofp, " add-output [-m <SIZE>] [-s <NAME>] [-n <NAME>] <URL> \| -C <URL> -D <URL>\n");
	90	fprintf(ofp, " Setup and add an snapshot output for a session.\n");
	91	fprintf(ofp, "\n");
e0dcb8bf	92	fprintf(ofp, " del-output ID \| NAME [-s <NAME>]\n");
57f272ed DG	93	fprintf(ofp, " Delete an output for a session using the ID.\n");
	94	fprintf(ofp, "\n");
	95	fprintf(ofp, " list-output [-s <NAME>]\n");
	96	fprintf(ofp, " List the output of a session.\n");
	97	fprintf(ofp, "\n");
	98	fprintf(ofp, " record [-m <SIZE>] [-s <NAME>] [-n <NAME>] [<URL> \| -C <URL> -D <URL>]\n");
	99	fprintf(ofp, " Snapshot a session's buffer(s) for all domains. If an URL is\n");
	100	fprintf(ofp, " specified, it is used instead of a previously added output.\n");
e0dcb8bf DG	101	fprintf(ofp, " Specifying only a name or/a size will override the current output value.\n");
	102	fprintf(ofp, " For instance, you can record a snapshot with a custom maximum size\n");
	103	fprintf(ofp, " or with a different name.\n");
57f272ed DG	104	fprintf(ofp, "\n");
	105	fprintf(ofp, "Options:\n");
	106	fprintf(ofp, " -h, --help Show this help\n");
	107	fprintf(ofp, " --list-options Simple listing of options\n");
	108	fprintf(ofp, " -s, --session NAME Apply to session name\n");
	109	fprintf(ofp, " -n, --name NAME Name of the output or snapshot\n");
a8f307d8	110	fprintf(ofp, " -m, --max-size SIZE Maximum bytes size of the snapshot {+k,+M,+G}\n");
57f272ed DG	111	fprintf(ofp, " -C, --ctrl-url URL Set control path URL. (Must use -D also)\n");
	112	fprintf(ofp, " -D, --data-url URL Set data path URL. (Must use -C also)\n");
	113	fprintf(ofp, "\n");
	114	}
	115
	116	/*
	117	* Count and return the number of arguments in argv.
	118	*/
	119	static int count_arguments(const char **argv)
	120	{
	121	int i = 0;
	122
	123	assert(argv);
	124
	125	while (argv[i] != NULL) {
	126	i++;
	127	}
	128
	129	return i;
	130	}
	131
	132	/*
	133	* Create a snapshot output object from arguments using the given URL.
	134	*
	135	* Return a newly allocated object or NULL on error.
	136	*/
	137	static struct lttng_snapshot_output create_output_from_args(const char url)
	138	{
	139	int ret = 0;
	140	struct lttng_snapshot_output *output = NULL;
	141
	142	output = lttng_snapshot_output_create();
	143	if (!output) {
	144	goto error_create;
	145	}
	146
	147	if (url) {
	148	ret = lttng_snapshot_output_set_ctrl_url(url, output);
	149	if (ret < 0) {
	150	goto error;
	151	}
	152	} else if (opt_ctrl_url) {
	153	ret = lttng_snapshot_output_set_ctrl_url(opt_ctrl_url, output);
	154	if (ret < 0) {
	155	goto error;
	156	}
	157	}
	158
	159	if (opt_data_url) {
	160	ret = lttng_snapshot_output_set_data_url(opt_data_url, output);
	161	if (ret < 0) {
	162	goto error;
	163	}
	164	}
	165
	166	if (opt_max_size) {
	167	ret = lttng_snapshot_output_set_size(opt_max_size, output);
	168	if (ret < 0) {
	169	goto error;
	170	}
	171	}
	172
	173	if (opt_output_name) {
	174	ret = lttng_snapshot_output_set_name(opt_output_name, output);
175	if (ret < 0) {
176	goto error;
177	}
178	}
179
180	return output;
181
182	error:
183	lttng_snapshot_output_destroy(output);
184	error_create:
185	return NULL;
186	}
187
50534d6f JRJ	188	static int mi_list_output(void)
	189	{
	190	int ret;
	191	struct lttng_snapshot_output *s_iter;
	192	struct lttng_snapshot_output_list *list;
	193
	194	assert(writer);
	195
	196	ret = lttng_snapshot_list_output(current_session_name, &list);
	197	if (ret < 0) {
	198	goto error;
	199	}
	200
	201	ret = mi_lttng_snapshot_output_session_name(writer, current_session_name);
	202	if (ret) {
	203	ret = CMD_ERROR;
	204	goto end;
	205	}
	206
	207	while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) {
	208	ret = mi_lttng_snapshot_list_output(writer, s_iter);
	209	if (ret) {
	210	ret = CMD_ERROR;
	211	goto end;
	212	}
	213	}
	214
	215
	216	/* Close snapshot snapshots element */
	217	ret = mi_lttng_writer_close_element(writer);
	218	if (ret) {
	219	ret = CMD_ERROR;
	220	goto end;
	221	}
	222
	223	/* Close snapshot session element */
	224	ret = mi_lttng_writer_close_element(writer);
	225	if (ret) {
	226	ret = CMD_ERROR;
	227	}
	228	end:
	229	lttng_snapshot_output_list_destroy(list);
	230	error:
	231	return ret;
	232	}
	233
57f272ed DG	234	static int list_output(void)
	235	{
	236	int ret, output_seen = 0;
	237	struct lttng_snapshot_output *s_iter;
	238	struct lttng_snapshot_output_list *list;
	239
	240	ret = lttng_snapshot_list_output(current_session_name, &list);
	241	if (ret < 0) {
	242	goto error;
	243	}
	244
	245	MSG("Snapshot output list for session %s", current_session_name);
	246
	247	while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) {
c3024823	248	MSG("%s[%" PRIu32 "] %s: %s (max-size: %" PRId64 ")", indent4,
57f272ed DG	249	lttng_snapshot_output_get_id(s_iter),
57f272ed DG	250	lttng_snapshot_output_get_name(s_iter),
c3024823 DG	251	lttng_snapshot_output_get_ctrl_url(s_iter),
c3024823 DG	252	lttng_snapshot_output_get_maxsize(s_iter));
57f272ed DG	253	output_seen = 1;
	254	}
	255
	256	lttng_snapshot_output_list_destroy(list);
	257
	258	if (!output_seen) {
	259	MSG("%sNone", indent4);
	260	}
	261
	262	error:
	263	return ret;
	264	}
	265
50534d6f JRJ	266	/*
	267	* Delete output by ID (machine interface version).
	268	*/
	269	static int mi_del_output(uint32_t id, const char *name)
	270	{
	271	int ret;
	272	struct lttng_snapshot_output *output = NULL;
	273
	274	assert(writer);
	275
	276	output = lttng_snapshot_output_create();
	277	if (!output) {
	278	ret = CMD_FATAL;
	279	goto error;
	280	}
	281
	282	if (name) {
	283	ret = lttng_snapshot_output_set_name(name, output);
	284	} else if (id != UINT32_MAX) {
	285	ret = lttng_snapshot_output_set_id(id, output);
	286	} else {
	287	ret = CMD_ERROR;
	288	goto error;
	289	}
	290	if (ret < 0) {
	291	ret = CMD_FATAL;
	292	goto error;
	293	}
	294
	295	ret = lttng_snapshot_del_output(current_session_name, output);
	296	if (ret < 0) {
50534d6f JRJ	297	goto error;
	298	}
	299
	300	ret = mi_lttng_snapshot_del_output(writer, id, name, current_session_name);
	301	if (ret) {
	302	ret = CMD_ERROR;
	303	}
	304
	305	error:
	306	lttng_snapshot_output_destroy(output);
	307	return ret;
	308	}
	309
57f272ed DG	310	/*
	311	* Delete output by ID.
	312	*/
eb240553	313	static int del_output(uint32_t id, const char *name)
57f272ed DG	314	{
	315	int ret;
	316	struct lttng_snapshot_output *output = NULL;
	317
	318	output = lttng_snapshot_output_create();
	319	if (!output) {
	320	ret = CMD_FATAL;
	321	goto error;
	322	}
	323
eb240553 DG	324	if (name) {
	325	ret = lttng_snapshot_output_set_name(name, output);
	326	} else if (id != UINT32_MAX) {
	327	ret = lttng_snapshot_output_set_id(id, output);
	328	} else {
	329	ret = CMD_ERROR;
	330	goto error;
	331	}
57f272ed DG	332	if (ret < 0) {
	333	ret = CMD_FATAL;
	334	goto error;
	335	}
	336
	337	ret = lttng_snapshot_del_output(current_session_name, output);
	338	if (ret < 0) {
	339	goto error;
	340	}
	341
eb240553 DG	342	if (id != UINT32_MAX) {
	343	MSG("Snapshot output id %" PRIu32 " successfully deleted for session %s",
	344	id, current_session_name);
	345	} else {
	346	MSG("Snapshot output %s successfully deleted for session %s",
	347	name, current_session_name);
	348	}
57f272ed DG	349
	350	error:
	351	lttng_snapshot_output_destroy(output);
	352	return ret;
	353	}
	354
50534d6f JRJ	355	/*
	356	* Add output from the user URL (machine interface).
	357	*/
	358	static int mi_add_output(const char *url)
	359	{
	360	int ret;
	361	struct lttng_snapshot_output *output = NULL;
	362	char name[NAME_MAX];
	363	const char *n_ptr;
	364
	365	if (!url && (!opt_data_url \|\| !opt_ctrl_url)) {
	366	ret = CMD_ERROR;
	367	goto error;
	368	}
	369
	370	output = create_output_from_args(url);
	371	if (!output) {
	372	ret = CMD_FATAL;
	373	goto error;
	374	}
	375
	376	/* This call, if successful, populates the id of the output object. */
	377	ret = lttng_snapshot_add_output(current_session_name, output);
	378	if (ret < 0) {
50534d6f JRJ	379	goto error;
	380	}
	381
	382	n_ptr = lttng_snapshot_output_get_name(output);
	383	if (*n_ptr == '\0') {
	384	int pret;
	385	pret = snprintf(name, sizeof(name), DEFAULT_SNAPSHOT_NAME "-%" PRIu32,
	386	lttng_snapshot_output_get_id(output));
	387	if (pret < 0) {
	388	PERROR("snprintf add output name");
	389	}
	390	n_ptr = name;
	391	}
	392
	393	ret = mi_lttng_snapshot_add_output(writer, current_session_name, n_ptr,
	394	output);
	395	if (ret) {
	396	ret = CMD_ERROR;
	397	}
	398
	399	error:
	400	lttng_snapshot_output_destroy(output);
	401	return ret;
	402	}
	403
57f272ed DG	404	/*
	405	* Add output from the user URL.
	406	*/
	407	static int add_output(const char *url)
	408	{
	409	int ret;
	410	struct lttng_snapshot_output *output = NULL;
6efe784e DG	411	char name[NAME_MAX];
6efe784e DG	412	const char *n_ptr;
57f272ed DG	413
	414	if (!url && (!opt_data_url \|\| !opt_ctrl_url)) {
	415	ret = CMD_ERROR;
	416	goto error;
	417	}
	418
	419	output = create_output_from_args(url);
	420	if (!output) {
	421	ret = CMD_FATAL;
	422	goto error;
	423	}
	424
	425	/* This call, if successful, populates the id of the output object. */
	426	ret = lttng_snapshot_add_output(current_session_name, output);
	427	if (ret < 0) {
	428	goto error;
	429	}
	430
6efe784e DG	431	n_ptr = lttng_snapshot_output_get_name(output);
	432	if (*n_ptr == '\0') {
	433	int pret;
	434	pret = snprintf(name, sizeof(name), DEFAULT_SNAPSHOT_NAME "-%" PRIu32,
	435	lttng_snapshot_output_get_id(output));
	436	if (pret < 0) {
	437	PERROR("snprintf add output name");
	438	}
	439	n_ptr = name;
	440	}
	441
57f272ed DG	442	MSG("Snapshot output successfully added for session %s",
	443	current_session_name);
	444	MSG(" [%" PRIu32 "] %s: %s (max-size: %" PRId64 ")",
6efe784e	445	lttng_snapshot_output_get_id(output), n_ptr,
57f272ed DG	446	lttng_snapshot_output_get_ctrl_url(output),
	447	lttng_snapshot_output_get_maxsize(output));
	448	error:
	449	lttng_snapshot_output_destroy(output);
	450	return ret;
	451	}
	452
	453	static int cmd_add_output(int argc, const char **argv)
	454	{
50534d6f	455	int ret;
57f272ed DG	456
	457	if (argc < 2 && (!opt_data_url \|\| !opt_ctrl_url)) {
	458	usage(stderr);
	459	ret = CMD_ERROR;
	460	goto end;
	461	}
	462
50534d6f JRJ	463	if (lttng_opt_mi) {
	464	ret = mi_add_output(argv[1]);
	465	} else {
	466	ret = add_output(argv[1]);
	467	}
57f272ed DG	468
	469	end:
	470	return ret;
	471	}
	472
	473	static int cmd_del_output(int argc, const char **argv)
	474	{
50534d6f	475	int ret;
eb240553 DG	476	char *name;
eb240553 DG	477	long id;
57f272ed DG	478
	479	if (argc < 2) {
	480	usage(stderr);
	481	ret = CMD_ERROR;
	482	goto end;
	483	}
	484
eb240553 DG	485	errno = 0;
	486	id = strtol(argv[1], &name, 10);
	487	if (id == 0 && errno == 0) {
50534d6f JRJ	488	if (lttng_opt_mi) {
	489	ret = mi_del_output(UINT32_MAX, name);
	490	} else {
	491	ret = del_output(UINT32_MAX, name);
	492	}
eb240553	493	} else if (errno == 0 && *name == '\0') {
50534d6f JRJ	494	if (lttng_opt_mi) {
	495	ret = mi_del_output(id, NULL);
	496	} else {
	497	ret = del_output(id, NULL);
	498	}
eb240553 DG	499	} else {
	500	ERR("Argument %s not recognized", argv[1]);
	501	ret = -1;
	502	goto end;
	503	}
57f272ed DG	504
	505	end:
	506	return ret;
	507	}
	508
	509	static int cmd_list_output(int argc, const char **argv)
	510	{
50534d6f JRJ	511	int ret;
	512
	513	if (lttng_opt_mi) {
	514	ret = mi_list_output();
	515	} else {
	516	ret = list_output();
	517	}
	518
	519	return ret;
	520	}
	521
	522	/*
	523	* Do a snapshot record with the URL if one is given (machine interface).
	524	*/
	525	static int mi_record(const char *url)
	526	{
	527	int ret;
	528	struct lttng_snapshot_output *output = NULL;
	529
	530	output = create_output_from_args(url);
	531	if (!output) {
	532	ret = CMD_FATAL;
	533	goto error;
	534	}
	535
	536	ret = lttng_snapshot_record(current_session_name, output, 0);
	537	if (ret < 0) {
	538	ret = CMD_ERROR;
	539	goto error;
	540	}
	541
	542	ret = mi_lttng_snapshot_record(writer, current_session_name, url,
	543	opt_ctrl_url, opt_data_url);
	544	if (ret) {
	545	ret = CMD_ERROR;
	546	}
	547
	548	error:
	549	lttng_snapshot_output_destroy(output);
	550	return ret;
57f272ed DG	551	}
	552
	553	/*
	554	* Do a snapshot record with the URL if one is given.
	555	*/
	556	static int record(const char *url)
	557	{
	558	int ret;
	559	struct lttng_snapshot_output *output = NULL;
	560
e1986656 DG	561	output = create_output_from_args(url);
	562	if (!output) {
	563	ret = CMD_FATAL;
	564	goto error;
57f272ed DG	565	}
	566
	567	ret = lttng_snapshot_record(current_session_name, output, 0);
	568	if (ret < 0) {
68808f4e DG	569	if (ret == -LTTNG_ERR_MAX_SIZE_INVALID) {
	570	ERR("The minimum size of a snapshot is computed by multiplying "
	571	"the total amount of streams with the largest subbuffer "
	572	"in the session.");
	573	}
57f272ed DG	574	goto error;
	575	}
	576
	577	MSG("Snapshot recorded successfully for session %s", current_session_name);
	578
	579	if (url) {
	580	MSG("Snapshot written at: %s", url);
	581	} else if (opt_ctrl_url) {
	582	MSG("Snapshot written to ctrl: %s, data: %s", opt_ctrl_url,
	583	opt_data_url);
57f272ed DG	584	}
	585
	586	error:
cdcdb9dd	587	lttng_snapshot_output_destroy(output);
57f272ed DG	588	return ret;
	589	}
	590
	591	static int cmd_record(int argc, const char **argv)
	592	{
	593	int ret;
	594
	595	if (argc == 2) {
	596	/* With a given URL */
50534d6f JRJ	597	if (lttng_opt_mi) {
	598	ret = mi_record(argv[1]);
	599	} else {
	600	ret = record(argv[1]);
	601	}
57f272ed	602	} else {
50534d6f JRJ	603	if (lttng_opt_mi) {
	604	ret = mi_record(NULL);
	605	} else {
	606	ret = record(NULL);
	607	}
57f272ed DG	608	}
	609
	610	return ret;
	611	}
	612
	613	static int handle_command(const char **argv)
	614	{
50534d6f	615	int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS;
57f272ed DG	616	struct cmd_struct *cmd;
	617
	618	if (argv == NULL \|\| (!opt_ctrl_url && opt_data_url) \|\|
	619	(opt_ctrl_url && !opt_data_url)) {
	620	usage(stderr);
50534d6f	621	command_ret = CMD_ERROR;
57f272ed DG	622	goto end;
	623	}
	624
	625	argc = count_arguments(argv);
	626
	627	cmd = &actions[i];
	628	while (cmd->func != NULL) {
	629	/* Find command */
	630	if (strcmp(argv[0], cmd->name) == 0) {
50534d6f JRJ	631	if (lttng_opt_mi) {
	632	/* Action element */
	633	ret = mi_lttng_writer_open_element(writer,
	634	mi_lttng_element_command_action);
	635	if (ret) {
	636	ret = CMD_ERROR;
	637	goto end;
	638	}
	639
	640	/* Name of the action */
	641	ret = mi_lttng_writer_write_element_string(writer,
	642	config_element_name, argv[0]);
	643	if (ret) {
	644	ret = CMD_ERROR;
	645	goto end;
	646	}
	647
	648	/* Open output element */
	649	ret = mi_lttng_writer_open_element(writer,
	650	mi_lttng_element_command_output);
	651	if (ret) {
	652	ret = CMD_ERROR;
	653	goto end;
	654	}
	655	}
	656
	657	command_ret = cmd->func(argc, argv);
	658
	659	if (lttng_opt_mi) {
	660	/* Close output and action element */
	661	ret = mi_lttng_close_multi_element(writer, 2);
	662	if (ret) {
	663	ret = CMD_ERROR;
	664	goto end;
	665	}
	666	}
57f272ed DG	667	goto end;
	668	}
	669	i++;
	670	cmd = &actions[i];
	671	}
	672
1ec06ed3	673	ret = CMD_UNDEFINED;
57f272ed DG	674
57f272ed DG	675	end:
1ec06ed3	676	/* Overwrite ret if an error occurred in cmd->func() */
50534d6f	677	ret = command_ret ? command_ret : ret;
57f272ed DG	678	return ret;
57f272ed DG	679	}
57f272ed DG	680	/*
	681	* The 'snapshot <cmd> <options>' first level command
	682	*/
	683	int cmd_snapshot(int argc, const char **argv)
	684	{
50534d6f	685	int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
57f272ed DG	686	char *session_name = NULL;
	687	static poptContext pc;
	688
	689	pc = poptGetContext(NULL, argc, argv, snapshot_opts, 0);
	690	poptReadDefaultConfig(pc, 0);
	691
50534d6f	692	/* Mi check */
c7e35b03	693	if (lttng_opt_mi) {
50534d6f JRJ	694	writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
	695	if (!writer) {
	696	ret = -LTTNG_ERR_NOMEM;
	697	goto end;
	698	}
	699
	700	/* Open command element */
	701	ret = mi_lttng_writer_command_open(writer,
	702	mi_lttng_element_command_snapshot);
	703	if (ret) {
	704	ret = CMD_ERROR;
	705	goto end;
	706	}
	707
	708	/* Open output element */
	709	ret = mi_lttng_writer_open_element(writer,
	710	mi_lttng_element_command_output);
	711	if (ret) {
	712	ret = CMD_ERROR;
	713	goto end;
	714	}
c7e35b03 JR	715	}
c7e35b03 JR	716
57f272ed DG	717	while ((opt = poptGetNextOpt(pc)) != -1) {
	718	switch (opt) {
	719	case OPT_HELP:
	720	usage(stdout);
	721	goto end;
	722	case OPT_LIST_OPTIONS:
	723	list_cmd_options(stdout, snapshot_opts);
	724	goto end;
3c9bd23c SM	725	case OPT_LIST_COMMANDS:
	726	list_commands(actions, stdout);
	727	goto end;
57f272ed DG	728	case OPT_MAX_SIZE:
57f272ed DG	729	{
a8f307d8	730	uint64_t val;
57f272ed DG	731	const char *opt = poptGetOptArg(pc);
57f272ed DG	732
a8f307d8	733	if (utils_parse_size_suffix((char *) opt, &val) < 0) {
57f272ed DG	734	ERR("Unable to handle max-size value %s", opt);
	735	ret = CMD_ERROR;
	736	goto end;
	737	}
	738
57f272ed DG	739	opt_max_size = val;
	740
	741	break;
	742	}
	743	default:
	744	usage(stderr);
	745	ret = CMD_UNDEFINED;
	746	goto end;
	747	}
	748	}
	749
	750	if (!opt_session_name) {
	751	session_name = get_session_name();
	752	if (session_name == NULL) {
	753	ret = CMD_ERROR;
	754	goto end;
	755	}
	756	current_session_name = session_name;
	757	} else {
	758	current_session_name = opt_session_name;
	759	}
	760
50534d6f	761	command_ret = handle_command(poptGetArgs(pc));
1ec06ed3	762	if (command_ret) {
50534d6f	763	switch (-command_ret) {
7badf927	764	case LTTNG_ERR_EPERM:
6dc3064a	765	ERR("The session needs to be set in no output mode (--no-output)");
7badf927 DG	766	break;
7badf927 DG	767	case LTTNG_ERR_SNAPSHOT_NODATA:
50534d6f	768	WARN("%s", lttng_strerror(command_ret));
7badf927 DG	769	break;
7badf927 DG	770	default:
50534d6f	771	ERR("%s", lttng_strerror(command_ret));
7badf927	772	break;
6dc3064a	773	}
50534d6f JRJ	774	success = 0;
	775	}
	776
	777	if (lttng_opt_mi) {
	778	/* Close output element */
	779	ret = mi_lttng_writer_close_element(writer);
	780	if (ret) {
	781	ret = CMD_ERROR;
	782	goto end;
	783	}
	784
	785	/* Success ? */
	786	ret = mi_lttng_writer_write_element_bool(writer,
	787	mi_lttng_element_command_success, success);
	788	if (ret) {
	789	ret = CMD_ERROR;
	790	goto end;
	791	}
	792
	793	/* Command element close */
	794	ret = mi_lttng_writer_command_close(writer);
	795	if (ret) {
	796	ret = CMD_ERROR;
	797	goto end;
	798	}
57f272ed DG	799	}
	800
	801	end:
50534d6f JRJ	802	/* Mi clean-up */
	803	if (writer && mi_lttng_writer_destroy(writer)) {
	804	/* Preserve original error code */
	805	ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
	806	}
	807
57f272ed DG	808	if (!opt_session_name) {
	809	free(session_name);
	810	}
50534d6f JRJ	811
	812	/* Overwrite ret if an error occured during handle_command */
	813	ret = command_ret ? command_ret : ret;
57f272ed DG	814	poptFreeContext(pc);
	815	return ret;
	816	}