[lttng-tools.git] / src / bin / lttng / commands / disable_events.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 <assert.h>

#include <common/mi-lttng.h>
#include <lttng/domain-internal.h>

#include "../command.h"

static char *opt_event_list;
static int opt_kernel;
static char *opt_channel_name;
static char *opt_session_name;
static int opt_userspace;
static int opt_disable_all;
static int opt_jul;
static int opt_log4j;
static int opt_python;
static int opt_event_type;

#ifdef LTTNG_EMBED_HELP
static const char help_msg[] =
#include <lttng-disable-event.1.h>
;
#endif

enum {
	OPT_HELP = 1,
	OPT_TYPE_SYSCALL,
	OPT_TYPE_TRACEPOINT,
	OPT_TYPE_PROBE,
	OPT_TYPE_FUNCTION,
	OPT_TYPE_ALL,
	OPT_LIST_OPTIONS,
};

static struct lttng_handle *handle;
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},
	{"all-events",     'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0},
	{"channel",        'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	{"jul",            'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
	{"log4j",          'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
	{"python",         'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
	{"kernel",         'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	{"userspace",      'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
	{"syscall",          0, POPT_ARG_NONE, 0, OPT_TYPE_SYSCALL, 0, 0},
	{"probe",            0, POPT_ARG_NONE, 0, OPT_TYPE_PROBE, 0, 0},
	{"tracepoint",       0, POPT_ARG_NONE, 0, OPT_TYPE_TRACEPOINT, 0, 0},
	{"function",         0, POPT_ARG_NONE, 0, OPT_TYPE_FUNCTION, 0, 0},
	{"all",              0, POPT_ARG_NONE, 0, OPT_TYPE_ALL, 0, 0},
	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{0, 0, 0, 0, 0, 0, 0}
};

static
const char *print_channel_name(const char *name)
{
	return name ? : DEFAULT_CHANNEL_NAME;
}

static
const char *print_raw_channel_name(const char *name)
{
	return name ? : "<default>";
}

static
const char *print_event_type(const enum lttng_event_type ev_type)
{
	switch (ev_type) {
	case LTTNG_EVENT_ALL:
		return "any";
	case LTTNG_EVENT_TRACEPOINT:
		return "tracepoint";
	case LTTNG_EVENT_PROBE:
		return "probe";
	case LTTNG_EVENT_FUNCTION:
		return "function";
	case LTTNG_EVENT_FUNCTION_ENTRY:
		return "function entry";
	case LTTNG_EVENT_SYSCALL:
		return "syscall";
	default:
		return "";
	}
}

/* Mi print a partial event.
 * enabled is 0 or 1
 * success is 0 or 1
 */
static int mi_print_event(const char *event_name, int enabled, int success)
{
	int ret;

	assert(writer);
	assert(event_name);

	/* Open event element */
	ret = mi_lttng_writer_open_element(writer, config_element_event);
	if (ret) {
		goto end;
	}

	/* Print the name of event */
	ret = mi_lttng_writer_write_element_string(writer,
			config_element_name, event_name);
	if (ret) {
		goto end;
	}

	/* Print enabled ? */
	ret = mi_lttng_writer_write_element_bool(writer,
			config_element_enabled, enabled);
	if (ret) {
		goto end;
	}

	/* Success ? */
	ret = mi_lttng_writer_write_element_bool(writer,
			mi_lttng_element_command_success, success);
	if (ret) {
		goto end;
	}

	/* Close event element */
	ret = mi_lttng_writer_close_element(writer);
end:
	return ret;
}

/*
 *  disable_events
 *
 *  Disabling event using the lttng API.
 */
static int disable_events(char *session_name)
{
	int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
	int enabled = 1, success = 1;
	char *event_name, *channel_name = NULL;
	struct lttng_domain dom;
	struct lttng_event event;

	memset(&dom, 0, sizeof(dom));

	/* Create lttng domain */
	if (opt_kernel) {
		dom.type = LTTNG_DOMAIN_KERNEL;
	} else if (opt_userspace) {
		dom.type = LTTNG_DOMAIN_UST;
	} else if (opt_jul) {
		dom.type = LTTNG_DOMAIN_JUL;
	} else if (opt_log4j) {
		dom.type = LTTNG_DOMAIN_LOG4J;
	} else if (opt_python) {
		dom.type = LTTNG_DOMAIN_PYTHON;
	} else {
		/* Checked by the caller. */
		assert(0);
	}

	channel_name = opt_channel_name;

	handle = lttng_create_handle(session_name, &dom);
	if (handle == NULL) {
		ret = -1;
		goto error;
	}

	/* Mi print the channel and open the events element */
	if (lttng_opt_mi) {
		ret = mi_lttng_writer_open_element(writer, config_element_channel);
		if (ret) {
			ret = CMD_ERROR;
			goto end;
		}

		ret = mi_lttng_writer_write_element_string(writer,
				config_element_name, print_channel_name(channel_name));
		if (ret) {
			ret = CMD_ERROR;
			goto end;
		}

		/* Open events element */
		ret = mi_lttng_writer_open_element(writer, config_element_events);
		if (ret) {
			ret = CMD_ERROR;
			goto end;
		}
	}

	memset(&event, 0, sizeof(event));
	/* Set default loglevel to any/unknown */
	event.loglevel = -1;

	/* opt_event_type contain the event type to disable at this point */
	event.type = opt_event_type;

	if (opt_disable_all) {
		command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
		if (command_ret < 0) {
			ERR("%s", lttng_strerror(command_ret));
			enabled = 1;
			success = 0;

		} else {
			enabled = 0;
			success = 1;
			MSG("All %s events of type %s are disabled in channel %s",
					lttng_domain_type_str(dom.type),
					print_event_type(opt_event_type),
					print_channel_name(channel_name));
		}

		if (lttng_opt_mi) {
			ret = mi_print_event("*", enabled, success);
			if (ret) {
				ret = CMD_ERROR;
				goto error;
			}
		}
	} else {
		/* Strip event list */
		event_name = strtok(opt_event_list, ",");
		while (event_name != NULL) {
			DBG("Disabling event %s", event_name);

			strncpy(event.name, event_name, sizeof(event.name));
			event.name[sizeof(event.name) - 1] = '\0';
			command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
			if (command_ret < 0) {
				ERR("%s of type %s : %s (channel %s, session %s)",
						event_name,
						print_event_type(opt_event_type),
						lttng_strerror(command_ret),
						command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
							? print_raw_channel_name(channel_name)
							: print_channel_name(channel_name),
						session_name);
				warn = 1;
				success = 0;
				/*
				 * If an error occurred we assume that the event is still
				 * enabled.
				 */
				enabled = 1;
			} else {
				MSG("%s %s of type %s disabled in channel %s for session %s",
						lttng_domain_type_str(dom.type),
						event_name,
						print_event_type(opt_event_type),
						print_channel_name(channel_name),
						session_name);
				success = 1;
				enabled = 0;
			}

			if (lttng_opt_mi) {
				ret = mi_print_event(event_name, enabled, success);
				if (ret) {
					ret = CMD_ERROR;
					goto error;
				}
			}

			/* Next event */
			event_name = strtok(NULL, ",");
		}
	}

end:
	if (lttng_opt_mi) {
		/* Close events element and channel element */
		ret = mi_lttng_close_multi_element(writer, 2);
		if (ret) {
			ret = CMD_ERROR;
		}
	}
error:
	/* if there is already an error preserve it */
	if (warn && !ret) {
		ret = CMD_WARNING;
	}

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

	lttng_destroy_handle(handle);
	return ret;
}

/*
 *  cmd_disable_events
 *
 *  Disable event to trace session
 */
int cmd_disable_events(int argc, const char **argv)
{
	int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
	static poptContext pc;
	char *session_name = NULL;
	const char *leftover = NULL;
	int event_type = -1;

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

	/* Default event type */
	opt_event_type = LTTNG_EVENT_ALL;

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			SHOW_HELP();
			goto end;
		case OPT_TYPE_SYSCALL:
			opt_event_type = LTTNG_EVENT_SYSCALL;
			break;
		case OPT_TYPE_TRACEPOINT:
			opt_event_type = LTTNG_EVENT_TRACEPOINT;
			break;
		case OPT_TYPE_PROBE:
			opt_event_type = LTTNG_EVENT_PROBE;
			break;
		case OPT_TYPE_FUNCTION:
			opt_event_type = LTTNG_EVENT_FUNCTION;
			break;
		case OPT_TYPE_ALL:
			opt_event_type = LTTNG_EVENT_ALL;
			break;
		case OPT_LIST_OPTIONS:
			list_cmd_options(stdout, long_options);
			goto end;
		default:
			ret = CMD_UNDEFINED;
			goto end;
		}

		/* Validate event type. Multiple event type are not supported. */
		if (event_type == -1) {
			event_type = opt_event_type;
		} else {
			if (event_type != opt_event_type) {
				ERR("Multiple event type not supported.");
				ret = CMD_ERROR;
				goto end;
			}
		}
	}

	ret = print_missing_or_multiple_domains(
			opt_kernel + opt_userspace + opt_jul + opt_log4j +
					opt_python,
			true);
	if (ret) {
		ret = CMD_ERROR;
		goto end;
	}

	/* Ust and agent only support ALL event type */
	if ((opt_userspace || opt_jul || opt_log4j || opt_python)
			&& opt_event_type != LTTNG_EVENT_ALL) {
		ERR("Disabling userspace and agent (-j | -l | -p) event(s) based on instrumentation type is not supported.\n");
		ret = CMD_ERROR;
		goto end;
	}

	opt_event_list = (char*) poptGetArg(pc);
	if (opt_event_list == NULL && opt_disable_all == 0) {
		ERR("Missing event name(s).\n");
		ret = CMD_ERROR;
		goto end;
	}

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

	/* 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_disable_event);
		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 = disable_events(session_name);
	if (command_ret) {
		success = 0;
	}

	/* Mi closing */
	if (lttng_opt_mi) {
		/* Close  output element */
		ret = mi_lttng_writer_close_element(writer);
		if (ret) {
			ret = CMD_ERROR;
			goto end;
		}

		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:
	if (!opt_session_name && session_name) {
		free(session_name);
	}

	/* 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 in disable_events */
	ret = command_ret ? command_ret : ret;

	poptFreeContext(pc);
	return ret;
}
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* SPDX-License-Identifier: GPL-2.0-only
	5	*
	6	*/
	7
	8	#define _LGPL_SOURCE
	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>
	16	#include <assert.h>
	17
	18	#include <common/mi-lttng.h>
	19	#include <lttng/domain-internal.h>
	20
	21	#include "../command.h"
	22
	23	static char *opt_event_list;
	24	static int opt_kernel;
	25	static char *opt_channel_name;
	26	static char *opt_session_name;
	27	static int opt_userspace;
	28	static int opt_disable_all;
	29	static int opt_jul;
	30	static int opt_log4j;
	31	static int opt_python;
	32	static int opt_event_type;
	33
	34	#ifdef LTTNG_EMBED_HELP
	35	static const char help_msg[] =
	36	#include <lttng-disable-event.1.h>
	37	;
	38	#endif
	39
	40	enum {
	41	OPT_HELP = 1,
	42	OPT_TYPE_SYSCALL,
	43	OPT_TYPE_TRACEPOINT,
	44	OPT_TYPE_PROBE,
	45	OPT_TYPE_FUNCTION,
	46	OPT_TYPE_ALL,
	47	OPT_LIST_OPTIONS,
	48	};
	49
	50	static struct lttng_handle *handle;
	51	static struct mi_writer *writer;
	52
	53	static struct poptOption long_options[] = {
	54	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	55	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
	56	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
	57	{"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0},
	58	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	59	{"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
	60	{"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
	61	{"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
	62	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	63	{"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
	64	{"syscall", 0, POPT_ARG_NONE, 0, OPT_TYPE_SYSCALL, 0, 0},
	65	{"probe", 0, POPT_ARG_NONE, 0, OPT_TYPE_PROBE, 0, 0},
	66	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TYPE_TRACEPOINT, 0, 0},
	67	{"function", 0, POPT_ARG_NONE, 0, OPT_TYPE_FUNCTION, 0, 0},
	68	{"all", 0, POPT_ARG_NONE, 0, OPT_TYPE_ALL, 0, 0},
	69	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	70	{0, 0, 0, 0, 0, 0, 0}
	71	};
	72
	73	static
	74	const char print_channel_name(const char name)
	75	{
	76	return name ? : DEFAULT_CHANNEL_NAME;
	77	}
	78
	79	static
	80	const char print_raw_channel_name(const char name)
	81	{
	82	return name ? : "<default>";
	83	}
	84
	85	static
	86	const char *print_event_type(const enum lttng_event_type ev_type)
	87	{
	88	switch (ev_type) {
	89	case LTTNG_EVENT_ALL:
	90	return "any";
	91	case LTTNG_EVENT_TRACEPOINT:
	92	return "tracepoint";
	93	case LTTNG_EVENT_PROBE:
	94	return "probe";
	95	case LTTNG_EVENT_FUNCTION:
	96	return "function";
	97	case LTTNG_EVENT_FUNCTION_ENTRY:
	98	return "function entry";
	99	case LTTNG_EVENT_SYSCALL:
	100	return "syscall";
	101	default:
	102	return "";
	103	}
	104	}
	105
	106	/* Mi print a partial event.
	107	* enabled is 0 or 1
	108	* success is 0 or 1
	109	*/
	110	static int mi_print_event(const char *event_name, int enabled, int success)
	111	{
	112	int ret;
	113
	114	assert(writer);
	115	assert(event_name);
	116
	117	/* Open event element */
	118	ret = mi_lttng_writer_open_element(writer, config_element_event);
	119	if (ret) {
	120	goto end;
	121	}
	122
	123	/* Print the name of event */
	124	ret = mi_lttng_writer_write_element_string(writer,
	125	config_element_name, event_name);
	126	if (ret) {
	127	goto end;
	128	}
	129
	130	/* Print enabled ? */
	131	ret = mi_lttng_writer_write_element_bool(writer,
	132	config_element_enabled, enabled);
	133	if (ret) {
	134	goto end;
	135	}
	136
	137	/* Success ? */
	138	ret = mi_lttng_writer_write_element_bool(writer,
	139	mi_lttng_element_command_success, success);
	140	if (ret) {
	141	goto end;
	142	}
	143
	144	/* Close event element */
	145	ret = mi_lttng_writer_close_element(writer);
	146	end:
	147	return ret;
	148	}
	149
	150	/*
	151	* disable_events
	152	*
	153	* Disabling event using the lttng API.
	154	*/
	155	static int disable_events(char *session_name)
	156	{
	157	int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
	158	int enabled = 1, success = 1;
	159	char event_name, channel_name = NULL;
	160	struct lttng_domain dom;
	161	struct lttng_event event;
	162
	163	memset(&dom, 0, sizeof(dom));
	164
	165	/* Create lttng domain */
	166	if (opt_kernel) {
	167	dom.type = LTTNG_DOMAIN_KERNEL;
	168	} else if (opt_userspace) {
	169	dom.type = LTTNG_DOMAIN_UST;
	170	} else if (opt_jul) {
	171	dom.type = LTTNG_DOMAIN_JUL;
	172	} else if (opt_log4j) {
	173	dom.type = LTTNG_DOMAIN_LOG4J;
	174	} else if (opt_python) {
	175	dom.type = LTTNG_DOMAIN_PYTHON;
	176	} else {
	177	/* Checked by the caller. */
	178	assert(0);
	179	}
	180
	181	channel_name = opt_channel_name;
	182
	183	handle = lttng_create_handle(session_name, &dom);
	184	if (handle == NULL) {
	185	ret = -1;
	186	goto error;
	187	}
	188
	189	/* Mi print the channel and open the events element */
	190	if (lttng_opt_mi) {
	191	ret = mi_lttng_writer_open_element(writer, config_element_channel);
	192	if (ret) {
	193	ret = CMD_ERROR;
	194	goto end;
	195	}
	196
	197	ret = mi_lttng_writer_write_element_string(writer,
	198	config_element_name, print_channel_name(channel_name));
	199	if (ret) {
	200	ret = CMD_ERROR;
	201	goto end;
	202	}
	203
	204	/* Open events element */
	205	ret = mi_lttng_writer_open_element(writer, config_element_events);
	206	if (ret) {
	207	ret = CMD_ERROR;
	208	goto end;
	209	}
	210	}
	211
	212	memset(&event, 0, sizeof(event));
	213	/* Set default loglevel to any/unknown */
	214	event.loglevel = -1;
	215
	216	/* opt_event_type contain the event type to disable at this point */
	217	event.type = opt_event_type;
	218
	219	if (opt_disable_all) {
	220	command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
	221	if (command_ret < 0) {
	222	ERR("%s", lttng_strerror(command_ret));
	223	enabled = 1;
	224	success = 0;
	225
	226	} else {
	227	enabled = 0;
	228	success = 1;
	229	MSG("All %s events of type %s are disabled in channel %s",
	230	lttng_domain_type_str(dom.type),
	231	print_event_type(opt_event_type),
	232	print_channel_name(channel_name));
	233	}
	234
	235	if (lttng_opt_mi) {
	236	ret = mi_print_event("*", enabled, success);
	237	if (ret) {
	238	ret = CMD_ERROR;
	239	goto error;
	240	}
	241	}
	242	} else {
	243	/* Strip event list */
	244	event_name = strtok(opt_event_list, ",");
	245	while (event_name != NULL) {
	246	DBG("Disabling event %s", event_name);
	247
	248	strncpy(event.name, event_name, sizeof(event.name));
	249	event.name[sizeof(event.name) - 1] = '\0';
	250	command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
	251	if (command_ret < 0) {
	252	ERR("%s of type %s : %s (channel %s, session %s)",
	253	event_name,
	254	print_event_type(opt_event_type),
	255	lttng_strerror(command_ret),
	256	command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
	257	? print_raw_channel_name(channel_name)
	258	: print_channel_name(channel_name),
	259	session_name);
	260	warn = 1;
	261	success = 0;
	262	/*
	263	* If an error occurred we assume that the event is still
	264	* enabled.
	265	*/
	266	enabled = 1;
	267	} else {
	268	MSG("%s %s of type %s disabled in channel %s for session %s",
	269	lttng_domain_type_str(dom.type),
	270	event_name,
	271	print_event_type(opt_event_type),
	272	print_channel_name(channel_name),
	273	session_name);
	274	success = 1;
	275	enabled = 0;
	276	}
	277
	278	if (lttng_opt_mi) {
	279	ret = mi_print_event(event_name, enabled, success);
	280	if (ret) {
	281	ret = CMD_ERROR;
	282	goto error;
	283	}
	284	}
	285
	286	/* Next event */
	287	event_name = strtok(NULL, ",");
	288	}
	289	}
	290
	291	end:
	292	if (lttng_opt_mi) {
	293	/* Close events element and channel element */
	294	ret = mi_lttng_close_multi_element(writer, 2);
	295	if (ret) {
	296	ret = CMD_ERROR;
	297	}
	298	}
	299	error:
	300	/* if there is already an error preserve it */
	301	if (warn && !ret) {
	302	ret = CMD_WARNING;
	303	}
	304
	305	/* Overwrite ret if an error occurred */
	306	ret = command_ret ? command_ret : ret;
	307
	308	lttng_destroy_handle(handle);
	309	return ret;
	310	}
	311
	312	/*
	313	* cmd_disable_events
	314	*
	315	* Disable event to trace session
	316	*/
	317	int cmd_disable_events(int argc, const char **argv)
	318	{
	319	int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
	320	static poptContext pc;
	321	char *session_name = NULL;
	322	const char *leftover = NULL;
	323	int event_type = -1;
	324
	325	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	326	poptReadDefaultConfig(pc, 0);
	327
	328	/* Default event type */
	329	opt_event_type = LTTNG_EVENT_ALL;
	330
	331	while ((opt = poptGetNextOpt(pc)) != -1) {
	332	switch (opt) {
	333	case OPT_HELP:
	334	SHOW_HELP();
	335	goto end;
	336	case OPT_TYPE_SYSCALL:
	337	opt_event_type = LTTNG_EVENT_SYSCALL;
	338	break;
	339	case OPT_TYPE_TRACEPOINT:
	340	opt_event_type = LTTNG_EVENT_TRACEPOINT;
	341	break;
	342	case OPT_TYPE_PROBE:
	343	opt_event_type = LTTNG_EVENT_PROBE;
	344	break;
	345	case OPT_TYPE_FUNCTION:
	346	opt_event_type = LTTNG_EVENT_FUNCTION;
	347	break;
	348	case OPT_TYPE_ALL:
	349	opt_event_type = LTTNG_EVENT_ALL;
	350	break;
	351	case OPT_LIST_OPTIONS:
	352	list_cmd_options(stdout, long_options);
	353	goto end;
	354	default:
	355	ret = CMD_UNDEFINED;
	356	goto end;
	357	}
	358
	359	/* Validate event type. Multiple event type are not supported. */
	360	if (event_type == -1) {
	361	event_type = opt_event_type;
	362	} else {
	363	if (event_type != opt_event_type) {
	364	ERR("Multiple event type not supported.");
	365	ret = CMD_ERROR;
	366	goto end;
	367	}
	368	}
	369	}
	370
	371	ret = print_missing_or_multiple_domains(
	372	opt_kernel + opt_userspace + opt_jul + opt_log4j +
	373	opt_python,
	374	true);
	375	if (ret) {
	376	ret = CMD_ERROR;
	377	goto end;
	378	}
	379
	380	/* Ust and agent only support ALL event type */
	381	if ((opt_userspace \|\| opt_jul \|\| opt_log4j \|\| opt_python)
	382	&& opt_event_type != LTTNG_EVENT_ALL) {
	383	ERR("Disabling userspace and agent (-j \| -l \| -p) event(s) based on instrumentation type is not supported.\n");
	384	ret = CMD_ERROR;
	385	goto end;
	386	}
	387
	388	opt_event_list = (char*) poptGetArg(pc);
	389	if (opt_event_list == NULL && opt_disable_all == 0) {
	390	ERR("Missing event name(s).\n");
	391	ret = CMD_ERROR;
	392	goto end;
	393	}
	394
	395	leftover = poptGetArg(pc);
	396	if (leftover) {
	397	ERR("Unknown argument: %s", leftover);
	398	ret = CMD_ERROR;
	399	goto end;
	400	}
	401
	402	if (!opt_session_name) {
	403	session_name = get_session_name();
	404	if (session_name == NULL) {
	405	ret = CMD_ERROR;
	406	goto end;
	407	}
	408	} else {
	409	session_name = opt_session_name;
	410	}
	411
	412	/* Mi check */
	413	if (lttng_opt_mi) {
	414	writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
	415	if (!writer) {
	416	ret = -LTTNG_ERR_NOMEM;
	417	goto end;
	418	}
	419
	420	/* Open command element */
	421	ret = mi_lttng_writer_command_open(writer,
	422	mi_lttng_element_command_disable_event);
	423	if (ret) {
	424	ret = CMD_ERROR;
	425	goto end;
	426	}
	427
	428	/* Open output element */
	429	ret = mi_lttng_writer_open_element(writer,
	430	mi_lttng_element_command_output);
	431	if (ret) {
	432	ret = CMD_ERROR;
	433	goto end;
	434	}
	435	}
	436
	437	command_ret = disable_events(session_name);
	438	if (command_ret) {
	439	success = 0;
	440	}
	441
	442	/* Mi closing */
	443	if (lttng_opt_mi) {
	444	/* Close output element */
	445	ret = mi_lttng_writer_close_element(writer);
	446	if (ret) {
	447	ret = CMD_ERROR;
	448	goto end;
	449	}
	450
	451	ret = mi_lttng_writer_write_element_bool(writer,
	452	mi_lttng_element_command_success, success);
	453	if (ret) {
	454	ret = CMD_ERROR;
	455	goto end;
	456	}
	457
	458	/* Command element close */
	459	ret = mi_lttng_writer_command_close(writer);
	460	if (ret) {
	461	ret = CMD_ERROR;
	462	goto end;
	463	}
	464	}
	465
	466	end:
	467	if (!opt_session_name && session_name) {
	468	free(session_name);
	469	}
	470
	471	/* Mi clean-up */
	472	if (writer && mi_lttng_writer_destroy(writer)) {
	473	/* Preserve original error code */
	474	ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
	475	}
	476
	477	/* Overwrite ret if an error occurred in disable_events */
	478	ret = command_ret ? command_ret : ret;
	479
	480	poptFreeContext(pc);
	481	return ret;
	482	}