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

/*
 * 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 <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 char *opt_session_name;
static int opt_destroy_all;
static int opt_no_wait;

#ifdef LTTNG_EMBED_HELP
static const char help_msg[] =
#include <lttng-destroy.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_destroy_all, 1, 0, 0},
	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{"no-wait",   'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * destroy_session
 *
 * Unregister the provided session to the session daemon. On success, removes
 * the default configuration.
 */
static int destroy_session(struct lttng_session *session)
{
	int ret;
	char *session_name = NULL;
	bool session_was_stopped;
	enum lttng_error_code ret_code;
	struct lttng_destruction_handle *handle = NULL;
        enum lttng_destruction_handle_status status;
	bool printed_wait_msg = false;
	enum lttng_rotation_state rotation_state;

	ret = lttng_stop_tracing_no_wait(session->name);
	if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
		ERR("%s", lttng_strerror(ret));
	}
	session_was_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
	if (!opt_no_wait) {
		do {
			ret = lttng_data_pending(session->name);
			if (ret < 0) {
				/* Return the data available call error. */
				goto error;
			}

			/*
			 * Data sleep time before retrying (in usec). Don't sleep if the call
			 * returned value indicates availability.
			 */
			if (ret) {
				if (!printed_wait_msg) {
					_MSG("Waiting for destruction of session \"%s\"",
							session->name);
					printed_wait_msg = true;
					fflush(stdout);
				}

				usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US);
				_MSG(".");
				fflush(stdout);
			}
		} while (ret != 0);
	}
	if (!session_was_stopped) {
		/*
		 * Don't print the event and packet loss warnings since the user
		 * already saw them when stopping the trace.
		 */
		print_session_stats(session->name);
	}

	ret_code = lttng_destroy_session_ext(session->name, &handle);
	if (ret_code != LTTNG_OK) {
		ret = -ret_code;
		goto error;
	}

	if (opt_no_wait) {
		goto skip_wait_rotation;
	}

	do {
		status = lttng_destruction_handle_wait_for_completion(handle,
				DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US / USEC_PER_MSEC);
		switch (status) {
		case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT:
			if (!printed_wait_msg) {
				_MSG("Waiting for destruction of session \"%s\"",
						session->name);
				printed_wait_msg = true;
			}
			_MSG(".");
			fflush(stdout);
			break;
		case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED:
			break;
		default:
			ERR("Failed to wait for the completion of the destruction of session \"%s\"",
					session->name);
			ret = -1;
			goto error;
		}
	} while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT);

	status = lttng_destruction_handle_get_result(handle, &ret_code);
	if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
		ERR("Failed to get the result of session destruction");
		ret = -1;
		goto error;
	}
	if (ret_code != LTTNG_OK) {
		ret = -ret_code;
		goto error;
	}

	status = lttng_destruction_handle_get_rotation_state(handle,
			&rotation_state);
	if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
		ERR("Failed to get rotation state from destruction handle");
		goto skip_wait_rotation;
	}
	switch (rotation_state) {
	case LTTNG_ROTATION_STATE_NO_ROTATION:
		break;
        case LTTNG_ROTATION_STATE_COMPLETED:
	{
		const struct lttng_trace_archive_location *location;

		status = lttng_destruction_handle_get_archive_location(handle,
				&location);
		if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
			if (printed_wait_msg) {
				MSG("");
				printed_wait_msg = false;
			}
			ret = print_trace_archive_location(location,
					session->name);
			if (ret) {
				ERR("Failed to print the location of trace archive");
				goto skip_wait_rotation;
			}
			break;
		}
		/* fall-through. */
        }
        default:
		ERR("Failed to get the location of the rotation performed during the session's destruction");
		goto skip_wait_rotation;
	}
skip_wait_rotation:
	MSG("%sSession \"%s\" destroyed", printed_wait_msg ? "\n" : "",
			session->name);
	printed_wait_msg = false;

	session_name = get_session_name_quiet();
	if (session_name && !strncmp(session->name, session_name, NAME_MAX)) {
		config_destroy_default();
	}

	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_destruction_handle_destroy(handle);
	free(session_name);
	return ret;
}

/*
 * destroy_all_sessions
 *
 * Call destroy_sessions for each registered sessions
 */
static int destroy_all_sessions(struct lttng_session *sessions, int count)
{
	int i;
	bool error_occurred = false;

	assert(count >= 0);
	if (count == 0) {
		MSG("No session found, nothing to do.");
	}

	for (i = 0; i < count; i++) {
		int ret = destroy_session(&sessions[i]);

		if (ret < 0) {
			ERR("%s during the destruction of session \"%s\"",
					lttng_strerror(ret),
					sessions[i].name);
			/* Continue to next session. */
			error_occurred = true;
		}
	}

	return error_occurred ? CMD_ERROR : CMD_SUCCESS;
}

/*
 * The 'destroy <options>' first level command
 */
int cmd_destroy(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;

	struct lttng_session *sessions;
	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_destroy);
		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;
		}
	}

	/* 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 destroyed */
	if (opt_destroy_all) {
		command_ret = destroy_all_sessions(sessions, count);
		if (command_ret) {
			success = 0;
		}
	} else {
		opt_session_name = (char *) poptGetArg(pc);

		if (!opt_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;
			}
		} else {
			session_name = opt_session_name;
		}

		/* 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 = destroy_session(&sessions[i]);
				if (command_ret) {
					success = 0;
					ERR("%s during the destruction of session \"%s\"",
							lttng_strerror(command_ret),
							sessions[i].name);
				}
			}
		}

		if (!found) {
			ERR("Session name %s not found", session_name);
			command_ret = LTTNG_ERR_SESS_NOT_FOUND;
			success = 0;
			goto mi_closing;
		}
	}

	leftover = poptGetArg(pc);
	if (leftover) {
		ERR("Unknown argument: %s", leftover);
		ret = CMD_ERROR;
		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;
	}

	if (opt_session_name == NULL) {
		free(session_name);
	}

	/* Overwrite ret if an error occurred during destroy_session/all */
	ret = command_ret ? command_ret : ret;

	poptFreeContext(pc);
	return ret;
}
Commit	Line	Data
f3ed775e	1	/*
ab5be9fa	2	* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
f3ed775e	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
f3ed775e	5	*
f3ed775e DG	6	*/
f3ed775e DG	7
6c1c0768	8	#define _LGPL_SOURCE
f3ed775e DG	9	#include <popt.h>
	10	#include <stdio.h>
	11	#include <stdlib.h>
	12	#include <string.h>
	13	#include <sys/stat.h>
	14	#include <sys/types.h>
	15	#include <unistd.h>
20fb9e02	16	#include <stdbool.h>
bbbfd849	17	#include <lttng/lttng.h>
f3ed775e	18
c399183f	19	#include "../command.h"
f3ed775e	20
65f25c66	21	#include <common/mi-lttng.h>
42224349	22	#include <common/sessiond-comm/sessiond-comm.h>
1dac0189	23	#include <common/utils.h>
42224349	24
fd076c09	25	static char *opt_session_name;
b09ee5ba	26	static int opt_destroy_all;
e20ee7c2	27	static int opt_no_wait;
f3ed775e	28
4fc83d94 PP	29	#ifdef LTTNG_EMBED_HELP
	30	static const char help_msg[] =
	31	#include <lttng-destroy.1.h>
	32	;
	33	#endif
	34
65f25c66 JRJ	35	/* Mi writer */
	36	static struct mi_writer *writer;
	37
f3ed775e DG	38	enum {
f3ed775e DG	39	OPT_HELP = 1,
679b4943	40	OPT_LIST_OPTIONS,
f3ed775e DG	41	};
	42
	43	static struct poptOption long_options[] = {
	44	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	45	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
b09ee5ba	46	{"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0},
679b4943	47	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
e20ee7c2	48	{"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0},
f3ed775e DG	49	{0, 0, 0, 0, 0, 0, 0}
	50	};
	51
f3ed775e	52	/*
b09ee5ba FG	53	* destroy_session
	54	*
	55	* Unregister the provided session to the session daemon. On success, removes
	56	* the default configuration.
f3ed775e	57	*/
65f25c66	58	static int destroy_session(struct lttng_session *session)
f3ed775e DG	59	{
f3ed775e DG	60	int ret;
1dac0189	61	char *session_name = NULL;
20fb9e02	62	bool session_was_stopped;
bbbfd849 JG	63	enum lttng_error_code ret_code;
	64	struct lttng_destruction_handle *handle = NULL;
	65	enum lttng_destruction_handle_status status;
	66	bool printed_wait_msg = false;
	67	enum lttng_rotation_state rotation_state;
f3ed775e	68
e20ee7c2 JD	69	ret = lttng_stop_tracing_no_wait(session->name);
	70	if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
	71	ERR("%s", lttng_strerror(ret));
	72	}
20fb9e02	73	session_was_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
e20ee7c2	74	if (!opt_no_wait) {
e20ee7c2 JD	75	do {
	76	ret = lttng_data_pending(session->name);
	77	if (ret < 0) {
	78	/* Return the data available call error. */
	79	goto error;
	80	}
	81
	82	/*
	83	* Data sleep time before retrying (in usec). Don't sleep if the call
	84	* returned value indicates availability.
	85	*/
	86	if (ret) {
01f55be4	87	if (!printed_wait_msg) {
bbbfd849 JG	88	_MSG("Waiting for destruction of session \"%s\"",
	89	session->name);
	90	printed_wait_msg = true;
01f55be4 JG	91	fflush(stdout);
	92	}
	93
c8f61fd4	94	usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US);
e20ee7c2 JD	95	_MSG(".");
	96	fflush(stdout);
	97	}
	98	} while (ret != 0);
e20ee7c2	99	}
20fb9e02 JD	100	if (!session_was_stopped) {
	101	/*
	102	* Don't print the event and packet loss warnings since the user
	103	* already saw them when stopping the trace.
	104	*/
	105	print_session_stats(session->name);
	106	}
e20ee7c2	107
bbbfd849 JG	108	ret_code = lttng_destroy_session_ext(session->name, &handle);
	109	if (ret_code != LTTNG_OK) {
	110	ret = -ret_code;
b09ee5ba	111	goto error;
f3ed775e DG	112	}
f3ed775e DG	113
bbbfd849 JG	114	if (opt_no_wait) {
	115	goto skip_wait_rotation;
	116	}
	117
	118	do {
	119	status = lttng_destruction_handle_wait_for_completion(handle,
c8f61fd4	120	DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US / USEC_PER_MSEC);
bbbfd849 JG	121	switch (status) {
	122	case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT:
	123	if (!printed_wait_msg) {
	124	_MSG("Waiting for destruction of session \"%s\"",
	125	session->name);
	126	printed_wait_msg = true;
	127	}
	128	_MSG(".");
	129	fflush(stdout);
	130	break;
	131	case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED:
	132	break;
	133	default:
	134	ERR("Failed to wait for the completion of the destruction of session \"%s\"",
	135	session->name);
	136	ret = -1;
	137	goto error;
	138	}
	139	} while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT);
	140
	141	status = lttng_destruction_handle_get_result(handle, &ret_code);
	142	if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
	143	ERR("Failed to get the result of session destruction");
	144	ret = -1;
	145	goto error;
	146	}
	147	if (ret_code != LTTNG_OK) {
3285a971	148	ret = -ret_code;
bbbfd849 JG	149	goto error;
	150	}
	151
	152	status = lttng_destruction_handle_get_rotation_state(handle,
	153	&rotation_state);
7d81aa9f JG	154	if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
	155	ERR("Failed to get rotation state from destruction handle");
	156	goto skip_wait_rotation;
	157	}
bbbfd849 JG	158	switch (rotation_state) {
	159	case LTTNG_ROTATION_STATE_NO_ROTATION:
	160	break;
	161	case LTTNG_ROTATION_STATE_COMPLETED:
	162	{
	163	const struct lttng_trace_archive_location *location;
	164
	165	status = lttng_destruction_handle_get_archive_location(handle,
	166	&location);
	167	if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) {
	168	if (printed_wait_msg) {
	169	MSG("");
	170	printed_wait_msg = false;
	171	}
	172	ret = print_trace_archive_location(location,
	173	session->name);
	174	if (ret) {
	175	ERR("Failed to print the location of trace archive");
	176	goto skip_wait_rotation;
	177	}
	178	break;
	179	}
	180	/* fall-through. */
	181	}
	182	default:
	183	ERR("Failed to get the location of the rotation performed during the session's destruction");
	184	goto skip_wait_rotation;
	185	}
	186	skip_wait_rotation:
	187	MSG("%sSession \"%s\" destroyed", printed_wait_msg ? "\n" : "",
	188	session->name);
f16edb77	189	printed_wait_msg = false;
1dac0189 PPM	190
	191	session_name = get_session_name_quiet();
	192	if (session_name && !strncmp(session->name, session_name, NAME_MAX)) {
	193	config_destroy_default();
	194	}
65f25c66 JRJ	195
	196	if (lttng_opt_mi) {
	197	ret = mi_lttng_session(writer, session, 0);
	198	if (ret) {
	199	ret = CMD_ERROR;
	200	goto error;
	201	}
	202	}
	203
f3ed775e	204	ret = CMD_SUCCESS;
b09ee5ba	205	error:
f16edb77 JG	206	if (printed_wait_msg) {
	207	MSG("");
	208	}
bbbfd849	209	lttng_destruction_handle_destroy(handle);
1dac0189	210	free(session_name);
b09ee5ba FG	211	return ret;
b09ee5ba FG	212	}
f3ed775e	213
b09ee5ba FG	214	/*
	215	* destroy_all_sessions
	216	*
	217	* Call destroy_sessions for each registered sessions
	218	*/
65f25c66	219	static int destroy_all_sessions(struct lttng_session *sessions, int count)
b09ee5ba	220	{
3285a971 JG	221	int i;
3285a971 JG	222	bool error_occurred = false;
b09ee5ba	223
3285a971	224	assert(count >= 0);
b09ee5ba FG	225	if (count == 0) {
	226	MSG("No session found, nothing to do.");
	227	}
60e835ca	228
b09ee5ba	229	for (i = 0; i < count; i++) {
3285a971 JG	230	int ret = destroy_session(&sessions[i]);
3285a971 JG	231
b09ee5ba	232	if (ret < 0) {
3285a971 JG	233	ERR("%s during the destruction of session \"%s\"",
	234	lttng_strerror(ret),
	235	sessions[i].name);
	236	/* Continue to next session. */
	237	error_occurred = true;
b09ee5ba	238	}
b73d0b29	239	}
3285a971 JG	240
3285a971 JG	241	return error_occurred ? CMD_ERROR : CMD_SUCCESS;
f3ed775e DG	242	}
	243
	244	/*
843f5df9	245	* The 'destroy <options>' first level command
f3ed775e DG	246	*/
	247	int cmd_destroy(int argc, const char **argv)
	248	{
b09ee5ba	249	int opt;
65f25c66	250	int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1;
f3ed775e	251	static poptContext pc;
b09ee5ba	252	char *session_name = NULL;
68c7f6e5	253	const char *leftover = NULL;
f3ed775e	254
65f25c66 JRJ	255	struct lttng_session *sessions;
	256	int count;
	257	int found;
	258
f3ed775e DG	259	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	260	poptReadDefaultConfig(pc, 0);
	261
	262	while ((opt = poptGetNextOpt(pc)) != -1) {
	263	switch (opt) {
	264	case OPT_HELP:
4ba92f18	265	SHOW_HELP();
b09ee5ba	266	break;
679b4943 SM	267	case OPT_LIST_OPTIONS:
679b4943 SM	268	list_cmd_options(stdout, long_options);
b09ee5ba	269	break;
f3ed775e	270	default:
f3ed775e	271	ret = CMD_UNDEFINED;
b09ee5ba	272	break;
f3ed775e	273	}
b09ee5ba	274	goto end;
f3ed775e DG	275	}
f3ed775e DG	276
65f25c66	277	/* Mi preparation */
c7e35b03	278	if (lttng_opt_mi) {
65f25c66 JRJ	279	writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
	280	if (!writer) {
	281	ret = -LTTNG_ERR_NOMEM;
	282	goto end;
	283	}
	284
	285	/* Open command element */
	286	ret = mi_lttng_writer_command_open(writer,
	287	mi_lttng_element_command_destroy);
	288	if (ret) {
	289	ret = CMD_ERROR;
	290	goto end;
	291	}
	292
	293	/* Open output element */
	294	ret = mi_lttng_writer_open_element(writer,
	295	mi_lttng_element_command_output);
	296	if (ret) {
	297	ret = CMD_ERROR;
	298	goto end;
	299	}
	300
	301	/* For validation and semantic purpose we open a sessions element */
	302	ret = mi_lttng_sessions_open(writer);
	303	if (ret) {
	304	ret = CMD_ERROR;
	305	goto end;
	306	}
	307	}
	308
	309	/* Recuperate all sessions for further operation */
	310	count = lttng_list_sessions(&sessions);
	311	if (count < 0) {
56c3ec9e JR	312	ERR("%s", lttng_strerror(count));
56c3ec9e JR	313	command_ret = CMD_ERROR;
65f25c66 JRJ	314	success = 0;
65f25c66 JRJ	315	goto mi_closing;
c7e35b03 JR	316	}
c7e35b03 JR	317
fd076c09	318	/* Ignore session name in case all sessions are to be destroyed */
b09ee5ba	319	if (opt_destroy_all) {
65f25c66 JRJ	320	command_ret = destroy_all_sessions(sessions, count);
	321	if (command_ret) {
	322	success = 0;
	323	}
	324	} else {
	325	opt_session_name = (char *) poptGetArg(pc);
	326
1dac0189	327	if (!opt_session_name) {
65f25c66 JRJ	328	/* No session name specified, lookup default */
	329	session_name = get_session_name();
	330	if (session_name == NULL) {
	331	command_ret = CMD_ERROR;
	332	success = 0;
	333	goto mi_closing;
	334	}
	335	} else {
	336	session_name = opt_session_name;
	337	}
fd076c09	338
65f25c66 JRJ	339	/* Find the corresponding lttng_session struct */
	340	found = 0;
	341	for (i = 0; i < count; i++) {
	342	if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
	343	found = 1;
	344	command_ret = destroy_session(&sessions[i]);
	345	if (command_ret) {
	346	success = 0;
3285a971 JG	347	ERR("%s during the destruction of session \"%s\"",
	348	lttng_strerror(command_ret),
	349	sessions[i].name);
65f25c66	350	}
65f25c66 JRJ	351	}
	352	}
	353
	354	if (!found) {
	355	ERR("Session name %s not found", session_name);
	356	command_ret = LTTNG_ERR_SESS_NOT_FOUND;
	357	success = 0;
	358	goto mi_closing;
	359	}
	360	}
	361
68c7f6e5 JD	362	leftover = poptGetArg(pc);
	363	if (leftover) {
	364	ERR("Unknown argument: %s", leftover);
	365	ret = CMD_ERROR;
	366	success = 0;
	367	goto mi_closing;
	368	}
	369
65f25c66 JRJ	370	mi_closing:
	371	/* Mi closing */
	372	if (lttng_opt_mi) {
	373	/* Close sessions and output element element */
	374	ret = mi_lttng_close_multi_element(writer, 2);
	375	if (ret) {
fd076c09	376	ret = CMD_ERROR;
b09ee5ba FG	377	goto end;
b09ee5ba FG	378	}
fd076c09	379
65f25c66 JRJ	380	/* Success ? */
	381	ret = mi_lttng_writer_write_element_bool(writer,
	382	mi_lttng_element_command_success, success);
	383	if (ret) {
	384	ret = CMD_ERROR;
	385	goto end;
	386	}
f3ed775e	387
65f25c66 JRJ	388	/* Command element close */
	389	ret = mi_lttng_writer_command_close(writer);
	390	if (ret) {
	391	ret = CMD_ERROR;
	392	goto end;
	393	}
	394	}
f3ed775e	395	end:
65f25c66 JRJ	396	/* Mi clean-up */
	397	if (writer && mi_lttng_writer_destroy(writer)) {
	398	/* Preserve original error code */
	399	ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
	400	}
	401
fd076c09	402	if (opt_session_name == NULL) {
b09ee5ba FG	403	free(session_name);
b09ee5ba FG	404	}
fd076c09	405
65f25c66 JRJ	406	/* Overwrite ret if an error occurred during destroy_session/all */
	407	ret = command_ret ? command_ret : ret;
	408
fd076c09	409	poptFreeContext(pc);
f3ed775e DG	410	return ret;
f3ed775e DG	411	}