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

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * 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
#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 "../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;

enum {
	OPT_HELP = 1,
	OPT_USERSPACE,
	OPT_SYSCALL,
	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},
	{"syscall",        0,   POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
	{"userspace",      'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] (-k | -u) [OPTIONS]\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, "  -c, --channel NAME       Apply to this channel\n");
	fprintf(ofp, "  -a, --all-events         Disable all tracepoints\n");
	fprintf(ofp, "  -k, --kernel             Apply for the kernel tracer\n");
	fprintf(ofp, "  -u, --userspace          Apply to the user-space tracer\n");
	fprintf(ofp, "  -j, --jul                Apply for Java application using JUL\n");
	fprintf(ofp, "  -l, --log4j              Apply to Java application using LOG4j\n");
	fprintf(ofp, "  -p, --python             Apply to Python application using logging\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "      --syscall            System call event\n");
	fprintf(ofp, "\n");
}

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>";
}

/* Mi print a partial event.
 * enabled is 0 or 1
 * success is 0 or 1
 */
static int mi_print_event(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;

	switch (opt_event_type) {
	case LTTNG_EVENT_SYSCALL:
		event.type = LTTNG_EVENT_SYSCALL;
		break;
	default:
		event.type = LTTNG_EVENT_ALL;
		break;
	}

	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 %s are disabled in channel %s",
					get_domain_str(dom.type),
					opt_event_type == LTTNG_EVENT_SYSCALL ? "system calls" : "events",
					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 %s: %s (channel %s, session %s)",
						opt_event_type == LTTNG_EVENT_SYSCALL ? "System call" : "Event",
						event_name,
						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 %s disabled in channel %s for session %s",
						get_domain_str(dom.type),
						opt_event_type == LTTNG_EVENT_SYSCALL ? "system call" : "event",
						event_name,
						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;
	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:
			usage(stdout);
			goto end;
		case OPT_USERSPACE:
			opt_userspace = 1;
			break;
		case OPT_SYSCALL:
			opt_event_type = LTTNG_EVENT_SYSCALL;
			break;
		case OPT_LIST_OPTIONS:
			list_cmd_options(stdout, long_options);
			goto end;
		default:
			usage(stderr);
			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);
	if (ret) {
		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");
		usage(stderr);
		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 occured in disable_events */
	ret = command_ret ? command_ret : ret;

	poptFreeContext(pc);
	return ret;
}
Commit	Line	Data
e953ef25 DG	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
d14d33bf AM	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as published by the Free Software Foundation.
e953ef25 DG	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
d14d33bf AM	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
e953ef25 DG	16	*/
	17
	18	#define _GNU_SOURCE
6c1c0768	19	#define _LGPL_SOURCE
e953ef25 DG	20	#include <popt.h>
	21	#include <stdio.h>
	22	#include <stdlib.h>
	23	#include <string.h>
	24	#include <sys/stat.h>
	25	#include <sys/types.h>
	26	#include <unistd.h>
e4d484a5 JRJ	27	#include <assert.h>
	28
	29	#include <common/mi-lttng.h>
e953ef25	30
c399183f	31	#include "../command.h"
e953ef25 DG	32
e953ef25 DG	33	static char *opt_event_list;
9730260e	34	static int opt_kernel;
e953ef25	35	static char *opt_channel_name;
5440dc42	36	static char *opt_session_name;
e953ef25 DG	37	static int opt_userspace;
e953ef25 DG	38	static int opt_disable_all;
b9dfb167	39	static int opt_jul;
5cdb6027	40	static int opt_log4j;
0e115563	41	static int opt_python;
6e911cad	42	static int opt_event_type;
e953ef25 DG	43
	44	enum {
	45	OPT_HELP = 1,
	46	OPT_USERSPACE,
6e911cad	47	OPT_SYSCALL,
679b4943	48	OPT_LIST_OPTIONS,
e953ef25 DG	49	};
e953ef25 DG	50
cd80958d	51	static struct lttng_handle *handle;
e4d484a5	52	static struct mi_writer *writer;
cd80958d	53
e953ef25 DG	54	static struct poptOption long_options[] = {
	55	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	56	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	57	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e953ef25 DG	58	{"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0},
e953ef25 DG	59	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
b9dfb167	60	{"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
5cdb6027	61	{"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
0e115563	62	{"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
e953ef25	63	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
6e911cad	64	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
d78d6610	65	{"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
679b4943	66	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
e953ef25 DG	67	{0, 0, 0, 0, 0, 0, 0}
	68	};
	69
	70	/*
	71	* usage
	72	*/
	73	static void usage(FILE *ofp)
	74	{
c138a39b	75	fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] (-k \| -u) [OPTIONS]\n");
e953ef25	76	fprintf(ofp, "\n");
32a6298d	77	fprintf(ofp, "Options:\n");
e953ef25	78	fprintf(ofp, " -h, --help Show this help\n");
679b4943	79	fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d DG	80	fprintf(ofp, " -s, --session NAME Apply to session name\n");
32a6298d DG	81	fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
9730260e	82	fprintf(ofp, " -a, --all-events Disable all tracepoints\n");
e953ef25	83	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701	84	fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
b9dfb167	85	fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
5cdb6027	86	fprintf(ofp, " -l, --log4j Apply to Java application using LOG4j\n");
0e115563	87	fprintf(ofp, " -p, --python Apply to Python application using logging\n");
e953ef25	88	fprintf(ofp, "\n");
6e911cad MD	89	fprintf(ofp, "Event options:\n");
	90	fprintf(ofp, " --syscall System call event\n");
	91	fprintf(ofp, "\n");
e953ef25 DG	92	}
e953ef25 DG	93
85076754 MD	94	static
	95	const char print_channel_name(const char name)
	96	{
	97	return name ? : DEFAULT_CHANNEL_NAME;
	98	}
	99
	100	static
	101	const char print_raw_channel_name(const char name)
	102	{
	103	return name ? : "<default>";
	104	}
	105
e4d484a5 JRJ	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(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
e953ef25 DG	150	/*
	151	* disable_events
	152	*
	153	* Disabling event using the lttng API.
	154	*/
cd80958d	155	static int disable_events(char *session_name)
e953ef25	156	{
e4d484a5 JRJ	157	int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
e4d484a5 JRJ	158	int enabled = 1, success = 1;
b73d0b29	159	char event_name, channel_name = NULL;
7d29a247	160	struct lttng_domain dom;
6e911cad	161	struct lttng_event event;
e953ef25	162
441c16a7 MD	163	memset(&dom, 0, sizeof(dom));
441c16a7 MD	164
d78d6610	165	/* Create lttng domain */
7d29a247 DG	166	if (opt_kernel) {
7d29a247 DG	167	dom.type = LTTNG_DOMAIN_KERNEL;
d78d6610	168	} else if (opt_userspace) {
9730260e	169	dom.type = LTTNG_DOMAIN_UST;
b9dfb167 DG	170	} else if (opt_jul) {
b9dfb167 DG	171	dom.type = LTTNG_DOMAIN_JUL;
5cdb6027 DG	172	} else if (opt_log4j) {
5cdb6027 DG	173	dom.type = LTTNG_DOMAIN_LOG4J;
0e115563 DG	174	} else if (opt_python) {
0e115563 DG	175	dom.type = LTTNG_DOMAIN_PYTHON;
9730260e	176	} else {
3ecec76a PP	177	/* Checked by the caller. */
3ecec76a PP	178	assert(0);
7d29a247 DG	179	}
7d29a247 DG	180
85076754	181	channel_name = opt_channel_name;
ae856491	182
cd80958d DG	183	handle = lttng_create_handle(session_name, &dom);
	184	if (handle == NULL) {
	185	ret = -1;
	186	goto error;
	187	}
	188
e4d484a5 JRJ	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;
e953ef25 DG	195	}
e953ef25 DG	196
e4d484a5 JRJ	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	}
e953ef25 DG	210	}
e953ef25 DG	211
6e911cad	212	memset(&event, 0, sizeof(event));
9b7431cf JG	213	/* Set default loglevel to any/unknown */
	214	event.loglevel = -1;
	215
6e911cad MD	216	switch (opt_event_type) {
	217	case LTTNG_EVENT_SYSCALL:
	218	event.type = LTTNG_EVENT_SYSCALL;
	219	break;
	220	default:
	221	event.type = LTTNG_EVENT_ALL;
	222	break;
	223	}
	224
e4d484a5	225	if (opt_disable_all) {
6e911cad	226	command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
e4d484a5 JRJ	227	if (command_ret < 0) {
	228	ERR("%s", lttng_strerror(command_ret));
	229	enabled = 1;
	230	success = 0;
	231
9730260e	232	} else {
e4d484a5 JRJ	233	enabled = 0;
e4d484a5 JRJ	234	success = 1;
6e911cad MD	235	MSG("All %s %s are disabled in channel %s",
	236	get_domain_str(dom.type),
	237	opt_event_type == LTTNG_EVENT_SYSCALL ? "system calls" : "events",
	238	print_channel_name(channel_name));
9730260e DG	239	}
9730260e DG	240
e4d484a5 JRJ	241	if (lttng_opt_mi) {
	242	ret = mi_print_event("*", enabled, success);
	243	if (ret) {
	244	ret = CMD_ERROR;
	245	goto error;
	246	}
	247	}
	248	} else {
	249	/* Strip event list */
	250	event_name = strtok(opt_event_list, ",");
	251	while (event_name != NULL) {
	252	DBG("Disabling event %s", event_name);
e953ef25	253
6e911cad MD	254	strncpy(event.name, event_name, sizeof(event.name));
	255	event.name[sizeof(event.name) - 1] = '\0';
	256	command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
e4d484a5	257	if (command_ret < 0) {
6e911cad MD	258	ERR("%s %s: %s (channel %s, session %s)",
	259	opt_event_type == LTTNG_EVENT_SYSCALL ? "System call" : "Event",
	260	event_name,
e4d484a5 JRJ	261	lttng_strerror(command_ret),
	262	command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
	263	? print_raw_channel_name(channel_name)
	264	: print_channel_name(channel_name),
	265	session_name);
	266	warn = 1;
	267	success = 0;
	268	/*
6e911cad MD	269	* If an error occurred we assume that the event is still
6e911cad MD	270	* enabled.
e4d484a5 JRJ	271	*/
	272	enabled = 1;
	273	} else {
6e911cad MD	274	MSG("%s %s %s disabled in channel %s for session %s",
	275	get_domain_str(dom.type),
	276	opt_event_type == LTTNG_EVENT_SYSCALL ? "system call" : "event",
	277	event_name,
e4d484a5 JRJ	278	print_channel_name(channel_name),
	279	session_name);
	280	success = 1;
	281	enabled = 0;
	282	}
	283
	284	if (lttng_opt_mi) {
	285	ret = mi_print_event(event_name, enabled, success);
	286	if (ret) {
	287	ret = CMD_ERROR;
	288	goto error;
	289	}
	290	}
	291
	292	/* Next event */
	293	event_name = strtok(NULL, ",");
	294	}
	295	}
ae856491	296
9730260e	297	end:
e4d484a5 JRJ	298	if (lttng_opt_mi) {
	299	/* Close events element and channel element */
	300	ret = mi_lttng_close_multi_element(writer, 2);
	301	if (ret) {
	302	ret = CMD_ERROR;
	303	}
	304	}
e953ef25	305	error:
e4d484a5 JRJ	306	/* if there is already an error preserve it */
e4d484a5 JRJ	307	if (warn && !ret) {
ae856491 DG	308	ret = CMD_WARNING;
ae856491 DG	309	}
cd80958d	310
e4d484a5 JRJ	311	/* Overwrite ret if an error occurred */
	312	ret = command_ret ? command_ret : ret;
	313
	314	lttng_destroy_handle(handle);
e953ef25 DG	315	return ret;
	316	}
	317
	318	/*
	319	* cmd_disable_events
	320	*
	321	* Disable event to trace session
	322	*/
	323	int cmd_disable_events(int argc, const char **argv)
	324	{
e4d484a5	325	int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
e953ef25	326	static poptContext pc;
cd80958d	327	char *session_name = NULL;
6e911cad	328	int event_type = -1;
e953ef25 DG	329
	330	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	331	poptReadDefaultConfig(pc, 0);
	332
6e911cad MD	333	/* Default event type */
	334	opt_event_type = LTTNG_EVENT_ALL;
	335
e953ef25 DG	336	while ((opt = poptGetNextOpt(pc)) != -1) {
	337	switch (opt) {
	338	case OPT_HELP:
ca1c3607	339	usage(stdout);
e953ef25 DG	340	goto end;
	341	case OPT_USERSPACE:
	342	opt_userspace = 1;
e953ef25	343	break;
6e911cad MD	344	case OPT_SYSCALL:
	345	opt_event_type = LTTNG_EVENT_SYSCALL;
	346	break;
679b4943 SM	347	case OPT_LIST_OPTIONS:
679b4943 SM	348	list_cmd_options(stdout, long_options);
679b4943	349	goto end;
e953ef25 DG	350	default:
	351	usage(stderr);
	352	ret = CMD_UNDEFINED;
	353	goto end;
	354	}
6e911cad MD	355
	356	/* Validate event type. Multiple event type are not supported. */
	357	if (event_type == -1) {
	358	event_type = opt_event_type;
	359	} else {
	360	if (event_type != opt_event_type) {
	361	ERR("Multiple event type not supported.");
	362	ret = CMD_ERROR;
	363	goto end;
	364	}
	365	}
e953ef25 DG	366	}
e953ef25 DG	367
3ecec76a PP	368	ret = print_missing_or_multiple_domains(
	369	opt_kernel + opt_userspace + opt_jul + opt_log4j + opt_python);
	370	if (ret) {
	371	ret = CMD_ERROR;
	372	goto end;
	373	}
	374
e953ef25 DG	375	opt_event_list = (char*) poptGetArg(pc);
	376	if (opt_event_list == NULL && opt_disable_all == 0) {
	377	ERR("Missing event name(s).\n");
	378	usage(stderr);
ca1c3607	379	ret = CMD_ERROR;
e953ef25 DG	380	goto end;
	381	}
	382
cd80958d DG	383	if (!opt_session_name) {
	384	session_name = get_session_name();
	385	if (session_name == NULL) {
ca1c3607	386	ret = CMD_ERROR;
cd80958d DG	387	goto end;
	388	}
	389	} else {
	390	session_name = opt_session_name;
	391	}
	392
e4d484a5 JRJ	393	/* Mi check */
	394	if (lttng_opt_mi) {
	395	writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
	396	if (!writer) {
	397	ret = -LTTNG_ERR_NOMEM;
	398	goto end;
	399	}
	400
	401	/* Open command element */
	402	ret = mi_lttng_writer_command_open(writer,
	403	mi_lttng_element_command_disable_event);
	404	if (ret) {
	405	ret = CMD_ERROR;
	406	goto end;
	407	}
	408
	409	/* Open output element */
	410	ret = mi_lttng_writer_open_element(writer,
	411	mi_lttng_element_command_output);
	412	if (ret) {
	413	ret = CMD_ERROR;
	414	goto end;
	415	}
	416	}
	417
	418	command_ret = disable_events(session_name);
	419	if (command_ret) {
	420	success = 0;
	421	}
	422
	423	/* Mi closing */
	424	if (lttng_opt_mi) {
	425	/* Close output element */
	426	ret = mi_lttng_writer_close_element(writer);
	427	if (ret) {
	428	ret = CMD_ERROR;
	429	goto end;
	430	}
	431
	432	ret = mi_lttng_writer_write_element_bool(writer,
	433	mi_lttng_element_command_success, success);
	434	if (ret) {
	435	ret = CMD_ERROR;
	436	goto end;
	437	}
	438
	439	/* Command element close */
	440	ret = mi_lttng_writer_command_close(writer);
	441	if (ret) {
	442	ret = CMD_ERROR;
	443	goto end;
	444	}
	445	}
e953ef25 DG	446
e953ef25 DG	447	end:
5853fd43 DG	448	if (!opt_session_name && session_name) {
	449	free(session_name);
	450	}
e4d484a5 JRJ	451
	452	/* Mi clean-up */
	453	if (writer && mi_lttng_writer_destroy(writer)) {
	454	/* Preserve original error code */
	455	ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
	456	}
	457
	458	/* Overwrite ret if an error occured in disable_events */
	459	ret = command_ret ? command_ret : ret;
	460
ca1c3607	461	poptFreeContext(pc);
e953ef25 DG	462	return ret;
e953ef25 DG	463	}