[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;
#if 0
/* Not implemented yet */
static char *opt_cmd_name;
static pid_t opt_pid;
#endif

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},
#if 0
	/* Not implemented yet */
	{"userspace",      'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
	{"pid",            'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
#else
	{"userspace",      'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
#endif
	{"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 {
		print_missing_domain();
		ret = CMD_ERROR;
		goto error;
	}

	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));
	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;
			}
		}
	}

	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;
d78d6610 DG	43	#if 0
	44	/* Not implemented yet */
	45	static char *opt_cmd_name;
e953ef25	46	static pid_t opt_pid;
d78d6610	47	#endif
e953ef25 DG	48
	49	enum {
	50	OPT_HELP = 1,
	51	OPT_USERSPACE,
6e911cad	52	OPT_SYSCALL,
679b4943	53	OPT_LIST_OPTIONS,
e953ef25 DG	54	};
e953ef25 DG	55
cd80958d	56	static struct lttng_handle *handle;
e4d484a5	57	static struct mi_writer *writer;
cd80958d	58
e953ef25 DG	59	static struct poptOption long_options[] = {
	60	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	61	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	62	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e953ef25 DG	63	{"all-events", 'a', POPT_ARG_VAL, &opt_disable_all, 1, 0, 0},
e953ef25 DG	64	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
b9dfb167	65	{"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
5cdb6027	66	{"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
0e115563	67	{"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
e953ef25	68	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
6e911cad	69	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
d78d6610 DG	70	#if 0
d78d6610 DG	71	/* Not implemented yet */
6caa2bcc	72	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
e953ef25	73	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
d78d6610 DG	74	#else
	75	{"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
	76	#endif
679b4943	77	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
e953ef25 DG	78	{0, 0, 0, 0, 0, 0, 0}
	79	};
	80
	81	/*
	82	* usage
	83	*/
	84	static void usage(FILE *ofp)
	85	{
c138a39b	86	fprintf(ofp, "usage: lttng disable-event NAME[,NAME2,...] (-k \| -u) [OPTIONS]\n");
e953ef25	87	fprintf(ofp, "\n");
32a6298d	88	fprintf(ofp, "Options:\n");
e953ef25	89	fprintf(ofp, " -h, --help Show this help\n");
679b4943	90	fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d DG	91	fprintf(ofp, " -s, --session NAME Apply to session name\n");
32a6298d DG	92	fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
9730260e	93	fprintf(ofp, " -a, --all-events Disable all tracepoints\n");
e953ef25	94	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701	95	fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
b9dfb167	96	fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
5cdb6027	97	fprintf(ofp, " -l, --log4j Apply to Java application using LOG4j\n");
0e115563	98	fprintf(ofp, " -p, --python Apply to Python application using logging\n");
e953ef25	99	fprintf(ofp, "\n");
6e911cad MD	100	fprintf(ofp, "Event options:\n");
	101	fprintf(ofp, " --syscall System call event\n");
	102	fprintf(ofp, "\n");
e953ef25 DG	103	}
e953ef25 DG	104
85076754 MD	105	static
	106	const char print_channel_name(const char name)
	107	{
	108	return name ? : DEFAULT_CHANNEL_NAME;
	109	}
	110
	111	static
	112	const char print_raw_channel_name(const char name)
	113	{
	114	return name ? : "<default>";
	115	}
	116
e4d484a5 JRJ	117	/* Mi print a partial event.
	118	* enabled is 0 or 1
	119	* success is 0 or 1
	120	*/
	121	static int mi_print_event(char *event_name, int enabled, int success)
	122	{
	123	int ret;
	124
	125	assert(writer);
	126	assert(event_name);
	127
	128	/* Open event element */
	129	ret = mi_lttng_writer_open_element(writer, config_element_event);
	130	if (ret) {
	131	goto end;
	132	}
	133
	134	/* Print the name of event */
	135	ret = mi_lttng_writer_write_element_string(writer,
	136	config_element_name, event_name);
	137	if (ret) {
	138	goto end;
	139	}
	140
	141	/* Print enabled ? */
	142	ret = mi_lttng_writer_write_element_bool(writer,
	143	config_element_enabled, enabled);
	144	if (ret) {
	145	goto end;
	146	}
	147
	148	/* Success ? */
	149	ret = mi_lttng_writer_write_element_bool(writer,
	150	mi_lttng_element_command_success, success);
	151	if (ret) {
	152	goto end;
	153	}
	154
	155	/* Close event element */
	156	ret = mi_lttng_writer_close_element(writer);
	157	end:
	158	return ret;
	159	}
	160
e953ef25 DG	161	/*
	162	* disable_events
	163	*
	164	* Disabling event using the lttng API.
	165	*/
cd80958d	166	static int disable_events(char *session_name)
e953ef25	167	{
e4d484a5 JRJ	168	int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
e4d484a5 JRJ	169	int enabled = 1, success = 1;
b73d0b29	170	char event_name, channel_name = NULL;
7d29a247	171	struct lttng_domain dom;
6e911cad	172	struct lttng_event event;
e953ef25	173
441c16a7 MD	174	memset(&dom, 0, sizeof(dom));
441c16a7 MD	175
d78d6610	176	/* Create lttng domain */
7d29a247 DG	177	if (opt_kernel) {
7d29a247 DG	178	dom.type = LTTNG_DOMAIN_KERNEL;
d78d6610	179	} else if (opt_userspace) {
9730260e	180	dom.type = LTTNG_DOMAIN_UST;
b9dfb167 DG	181	} else if (opt_jul) {
b9dfb167 DG	182	dom.type = LTTNG_DOMAIN_JUL;
5cdb6027 DG	183	} else if (opt_log4j) {
5cdb6027 DG	184	dom.type = LTTNG_DOMAIN_LOG4J;
0e115563 DG	185	} else if (opt_python) {
0e115563 DG	186	dom.type = LTTNG_DOMAIN_PYTHON;
9730260e	187	} else {
b9dfb167	188	print_missing_domain();
d16c1a4c	189	ret = CMD_ERROR;
9730260e	190	goto error;
7d29a247 DG	191	}
7d29a247 DG	192
85076754	193	channel_name = opt_channel_name;
ae856491	194
cd80958d DG	195	handle = lttng_create_handle(session_name, &dom);
	196	if (handle == NULL) {
	197	ret = -1;
	198	goto error;
	199	}
	200
e4d484a5 JRJ	201	/* Mi print the channel and open the events element */
	202	if (lttng_opt_mi) {
	203	ret = mi_lttng_writer_open_element(writer, config_element_channel);
	204	if (ret) {
	205	ret = CMD_ERROR;
	206	goto end;
e953ef25 DG	207	}
e953ef25 DG	208
e4d484a5 JRJ	209	ret = mi_lttng_writer_write_element_string(writer,
	210	config_element_name, print_channel_name(channel_name));
	211	if (ret) {
	212	ret = CMD_ERROR;
	213	goto end;
	214	}
	215
	216	/* Open events element */
	217	ret = mi_lttng_writer_open_element(writer, config_element_events);
	218	if (ret) {
	219	ret = CMD_ERROR;
	220	goto end;
	221	}
e953ef25 DG	222	}
e953ef25 DG	223
6e911cad MD	224	memset(&event, 0, sizeof(event));
	225	switch (opt_event_type) {
	226	case LTTNG_EVENT_SYSCALL:
	227	event.type = LTTNG_EVENT_SYSCALL;
	228	break;
	229	default:
	230	event.type = LTTNG_EVENT_ALL;
	231	break;
	232	}
	233
e4d484a5	234	if (opt_disable_all) {
6e911cad	235	command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
e4d484a5 JRJ	236	if (command_ret < 0) {
	237	ERR("%s", lttng_strerror(command_ret));
	238	enabled = 1;
	239	success = 0;
	240
9730260e	241	} else {
e4d484a5 JRJ	242	enabled = 0;
e4d484a5 JRJ	243	success = 1;
6e911cad MD	244	MSG("All %s %s are disabled in channel %s",
	245	get_domain_str(dom.type),
	246	opt_event_type == LTTNG_EVENT_SYSCALL ? "system calls" : "events",
	247	print_channel_name(channel_name));
9730260e DG	248	}
9730260e DG	249
e4d484a5 JRJ	250	if (lttng_opt_mi) {
	251	ret = mi_print_event("*", enabled, success);
	252	if (ret) {
	253	ret = CMD_ERROR;
	254	goto error;
	255	}
	256	}
	257	} else {
	258	/* Strip event list */
	259	event_name = strtok(opt_event_list, ",");
	260	while (event_name != NULL) {
	261	DBG("Disabling event %s", event_name);
e953ef25	262
6e911cad MD	263	strncpy(event.name, event_name, sizeof(event.name));
	264	event.name[sizeof(event.name) - 1] = '\0';
	265	command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
e4d484a5	266	if (command_ret < 0) {
6e911cad MD	267	ERR("%s %s: %s (channel %s, session %s)",
	268	opt_event_type == LTTNG_EVENT_SYSCALL ? "System call" : "Event",
	269	event_name,
e4d484a5 JRJ	270	lttng_strerror(command_ret),
	271	command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
	272	? print_raw_channel_name(channel_name)
	273	: print_channel_name(channel_name),
	274	session_name);
	275	warn = 1;
	276	success = 0;
	277	/*
6e911cad MD	278	* If an error occurred we assume that the event is still
6e911cad MD	279	* enabled.
e4d484a5 JRJ	280	*/
	281	enabled = 1;
	282	} else {
6e911cad MD	283	MSG("%s %s %s disabled in channel %s for session %s",
	284	get_domain_str(dom.type),
	285	opt_event_type == LTTNG_EVENT_SYSCALL ? "system call" : "event",
	286	event_name,
e4d484a5 JRJ	287	print_channel_name(channel_name),
	288	session_name);
	289	success = 1;
	290	enabled = 0;
	291	}
	292
	293	if (lttng_opt_mi) {
	294	ret = mi_print_event(event_name, enabled, success);
	295	if (ret) {
	296	ret = CMD_ERROR;
	297	goto error;
	298	}
	299	}
	300
	301	/* Next event */
	302	event_name = strtok(NULL, ",");
	303	}
	304	}
ae856491	305
9730260e	306	end:
e4d484a5 JRJ	307	if (lttng_opt_mi) {
	308	/* Close events element and channel element */
	309	ret = mi_lttng_close_multi_element(writer, 2);
	310	if (ret) {
	311	ret = CMD_ERROR;
	312	}
	313	}
e953ef25	314	error:
e4d484a5 JRJ	315	/* if there is already an error preserve it */
e4d484a5 JRJ	316	if (warn && !ret) {
ae856491 DG	317	ret = CMD_WARNING;
ae856491 DG	318	}
cd80958d	319
e4d484a5 JRJ	320	/* Overwrite ret if an error occurred */
	321	ret = command_ret ? command_ret : ret;
	322
	323	lttng_destroy_handle(handle);
e953ef25 DG	324	return ret;
	325	}
	326
	327	/*
	328	* cmd_disable_events
	329	*
	330	* Disable event to trace session
	331	*/
	332	int cmd_disable_events(int argc, const char **argv)
	333	{
e4d484a5	334	int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
e953ef25	335	static poptContext pc;
cd80958d	336	char *session_name = NULL;
6e911cad	337	int event_type = -1;
e953ef25 DG	338
	339	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	340	poptReadDefaultConfig(pc, 0);
	341
6e911cad MD	342	/* Default event type */
	343	opt_event_type = LTTNG_EVENT_ALL;
	344
e953ef25 DG	345	while ((opt = poptGetNextOpt(pc)) != -1) {
	346	switch (opt) {
	347	case OPT_HELP:
ca1c3607	348	usage(stdout);
e953ef25 DG	349	goto end;
	350	case OPT_USERSPACE:
	351	opt_userspace = 1;
e953ef25	352	break;
6e911cad MD	353	case OPT_SYSCALL:
	354	opt_event_type = LTTNG_EVENT_SYSCALL;
	355	break;
679b4943 SM	356	case OPT_LIST_OPTIONS:
679b4943 SM	357	list_cmd_options(stdout, long_options);
679b4943	358	goto end;
e953ef25 DG	359	default:
	360	usage(stderr);
	361	ret = CMD_UNDEFINED;
	362	goto end;
	363	}
6e911cad MD	364
	365	/* Validate event type. Multiple event type are not supported. */
	366	if (event_type == -1) {
	367	event_type = opt_event_type;
	368	} else {
	369	if (event_type != opt_event_type) {
	370	ERR("Multiple event type not supported.");
	371	ret = CMD_ERROR;
	372	goto end;
	373	}
	374	}
e953ef25 DG	375	}
	376
	377	opt_event_list = (char*) poptGetArg(pc);
	378	if (opt_event_list == NULL && opt_disable_all == 0) {
	379	ERR("Missing event name(s).\n");
	380	usage(stderr);
ca1c3607	381	ret = CMD_ERROR;
e953ef25 DG	382	goto end;
	383	}
	384
cd80958d DG	385	if (!opt_session_name) {
	386	session_name = get_session_name();
	387	if (session_name == NULL) {
ca1c3607	388	ret = CMD_ERROR;
cd80958d DG	389	goto end;
	390	}
	391	} else {
	392	session_name = opt_session_name;
	393	}
	394
e4d484a5 JRJ	395	/* Mi check */
	396	if (lttng_opt_mi) {
	397	writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
	398	if (!writer) {
	399	ret = -LTTNG_ERR_NOMEM;
	400	goto end;
	401	}
	402
	403	/* Open command element */
	404	ret = mi_lttng_writer_command_open(writer,
	405	mi_lttng_element_command_disable_event);
	406	if (ret) {
	407	ret = CMD_ERROR;
	408	goto end;
	409	}
	410
	411	/* Open output element */
	412	ret = mi_lttng_writer_open_element(writer,
	413	mi_lttng_element_command_output);
	414	if (ret) {
	415	ret = CMD_ERROR;
	416	goto end;
	417	}
	418	}
	419
	420	command_ret = disable_events(session_name);
	421	if (command_ret) {
	422	success = 0;
	423	}
	424
	425	/* Mi closing */
	426	if (lttng_opt_mi) {
	427	/* Close output element */
	428	ret = mi_lttng_writer_close_element(writer);
	429	if (ret) {
	430	ret = CMD_ERROR;
	431	goto end;
	432	}
	433
	434	ret = mi_lttng_writer_write_element_bool(writer,
	435	mi_lttng_element_command_success, success);
	436	if (ret) {
	437	ret = CMD_ERROR;
	438	goto end;
	439	}
	440
	441	/* Command element close */
	442	ret = mi_lttng_writer_command_close(writer);
	443	if (ret) {
	444	ret = CMD_ERROR;
	445	goto end;
	446	}
	447	}
e953ef25 DG	448
e953ef25 DG	449	end:
5853fd43 DG	450	if (!opt_session_name && session_name) {
	451	free(session_name);
	452	}
e4d484a5 JRJ	453
	454	/* Mi clean-up */
	455	if (writer && mi_lttng_writer_destroy(writer)) {
	456	/* Preserve original error code */
	457	ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
	458	}
	459
	460	/* Overwrite ret if an error occured in disable_events */
	461	ret = command_ret ? command_ret : ret;
	462
ca1c3607	463	poptFreeContext(pc);
e953ef25 DG	464	return ret;
e953ef25 DG	465	}