[lttng-tools.git] / lttng / commands / list.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
 * as published by the Free Software Foundation; only version 2
 * of the License.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#define _GNU_SOURCE
#include <inttypes.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "../cmd.h"

static int opt_pid;
static int opt_userspace;
static int opt_kernel;
static char *opt_channel;
static int opt_domain;

const char *indent4 = "    ";
const char *indent6 = "      ";
const char *indent8 = "        ";

enum {
	OPT_HELP = 1,
};

static struct lttng_handle *handle;

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{"help",      'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
	{"kernel",    'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	{"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
	{"pid",       'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	{"channel",   'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
	{"domain",    'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng list [[-k] [-u] [-p PID] [SESSION [<options>]]]\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "With no arguments, list available tracing session(s)\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "With -k alone, list available kernel events\n");
	fprintf(ofp, "With -u alone, list available userspace events\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  -h, --help              Show this help\n");
	fprintf(ofp, "  -k, --kernel            Select kernel domain\n");
	fprintf(ofp, "  -u, --userspace         Select user-space domain.\n");
	fprintf(ofp, "  -p, --pid PID           List user-space events by PID\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Options:\n");
	fprintf(ofp, "  -c, --channel NAME      List details of a channel\n");
	fprintf(ofp, "  -d, --domain            List available domain(s)\n");
	fprintf(ofp, "\n");
}

/*
 * Get command line from /proc for a specific pid.
 *
 * On success, return an allocated string pointer to the proc cmdline.
 * On error, return NULL.
 */
#ifdef DISABLE
static char *get_cmdline_by_pid(pid_t pid)
{
	int ret;
	FILE *fp;
	char *cmdline = NULL;
	char path[24];	/* Can't go bigger than /proc/65535/cmdline */

	snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
	fp = fopen(path, "r");
	if (fp == NULL) {
		goto end;
	}

	/* Caller must free() *cmdline */
	cmdline = malloc(PATH_MAX);
	ret = fread(cmdline, 1, PATH_MAX, fp);
	if (ret < 0) {
		perror("fread proc list");
	}
	fclose(fp);

end:
	return cmdline;
}
#endif /* DISABLE */

/*
 * Ask for all trace events in the kernel and pretty print them.
 */
static int list_kernel_events(void)
{
	int i, size;
	struct lttng_event *event_list;

	DBG("Getting all tracing events");

	size = lttng_list_tracepoints(handle, &event_list);
	if (size < 0) {
		ERR("Unable to list kernel events");
		return size;
	}

	MSG("Kernel events:\n-------------");

	for (i = 0; i < size; i++) {
		MSG("  %s", event_list[i].name);
	}

	free(event_list);

	return CMD_SUCCESS;
}

/*
 * List events of channel of session and domain.
 */
static int list_events(const char *channel_name)
{
	int ret, count, i;
	struct lttng_event *events = NULL;

	count = lttng_list_events(handle, channel_name, &events);
	if (count < 0) {
		ret = count;
		goto error;
	}

	MSG("\n%sEvents:", indent4);
	if (count == 0) {
		MSG("%sNone", indent6);
		goto end;
	}

	for (i = 0; i < count; i++) {
		switch (events[i].type) {
			case LTTNG_EVENT_TRACEPOINT:
				MSG("%s%s (type: tracepoint) [enabled: %d]", indent6,
						events[i].name, events[i].enabled);
				break;
			case LTTNG_EVENT_PROBE:
				MSG("%s%s (type: probe) [enabled: %d]", indent6,
						events[i].name, events[i].enabled);
				if (events[i].attr.probe.addr != 0) {
					MSG("%saddr: 0x%" PRIx64, indent8, events[i].attr.probe.addr);
				} else {
					MSG("%soffset: 0x%" PRIx64, indent8, events[i].attr.probe.offset);
					MSG("%ssymbol: %s", indent8, events[i].attr.probe.symbol_name);
				}
				break;
			case LTTNG_EVENT_FUNCTION:
			case LTTNG_EVENT_FUNCTION_ENTRY:
				MSG("%s%s (type: function) [enabled: %d]", indent6,
						events[i].name, events[i].enabled);
				MSG("%ssymbol: \"%s\"", indent8, events[i].attr.ftrace.symbol_name);
				break;
			case LTTNG_EVENT_SYSCALLS:
				MSG("%s (type: syscalls) [enabled: %d]", indent6,
						events[i].enabled);
				break;
			case LTTNG_EVENT_NOOP:
				MSG("%s (type: noop) [enabled: %d]", indent6,
						events[i].enabled);
				break;
		}
	}

	MSG("");

end:
	if (events) {
		free(events);
	}
	ret = CMD_SUCCESS;

error:
	return ret;
}

/*
 * Pretty print channel
 */
static void print_channel(struct lttng_channel *channel)
{
	MSG("- %s (enabled: %d):\n", channel->name, channel->enabled);

	MSG("%sAttributes:", indent4);
	MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
	MSG("%ssubbufers size: %" PRIu64, indent6, channel->attr.subbuf_size);
	MSG("%snumber of subbufers: %" PRIu64, indent6, channel->attr.num_subbuf);
	MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
	MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
	switch (channel->attr.output) {
		case LTTNG_EVENT_SPLICE:
			MSG("%soutput: splice()", indent6);
			break;
		case LTTNG_EVENT_MMAP:
			MSG("%soutput: mmap()", indent6);
			break;
	}
}

/*
 * List channel(s) of session and domain.
 *
 * If channel_name is NULL, all channels are listed.
 */
static int list_channels(const char *channel_name)
{
	int count, i, ret = CMD_SUCCESS;
	unsigned int chan_found = 0;
	struct lttng_channel *channels = NULL;

	DBG("Listing channel(s) (%s)", channel_name);

	count = lttng_list_channels(handle, &channels);
	if (count < 0) {
		ret = count;
		goto error;
	} else if (count == 0) {
		MSG("No channel found");
		goto end;
	}

	if (channel_name == NULL) {
		MSG("Channels:\n-------------");
	}

	for (i = 0; i < count; i++) {
		if (channel_name != NULL) {
			if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
				chan_found = 1;
			} else {
				continue;
			}
		}
		print_channel(&channels[i]);

		/* Listing events per channel */
		ret = list_events(channels[i].name);
		if (ret < 0) {
			MSG("%s", lttng_get_readable_code(ret));
		}

		if (chan_found) {
			break;
		}
	}

	if (!chan_found && channel_name != NULL) {
		MSG("Channel %s not found", channel_name);
	}

end:
	free(channels);
	ret = CMD_SUCCESS;

error:
	return ret;
}

/*
 * List available tracing session. List only basic information.
 *
 * If session_name is NULL, all sessions are listed.
 */
static int list_sessions(const char *session_name)
{
	int ret, count, i;
	unsigned int session_found = 0;
	struct lttng_session *sessions;

	count = lttng_list_sessions(&sessions);
	DBG("Session count %d", count);
	if (count < 0) {
		ret = count;
		goto error;
	}

	if (session_name == NULL) {
		MSG("Available tracing sessions:");
	}

	for (i = 0; i < count; i++) {
		if (session_name != NULL) {
			if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
				session_found = 1;
				MSG("Tracing session %s:", session_name);
				MSG("%sTrace path: %s\n", indent4, sessions[i].path);
				break;
			}
			continue;
		}

		MSG("  %d) %s (%s)", i + 1, sessions[i].name, sessions[i].path);

		if (session_found) {
			break;
		}
	}

	free(sessions);

	if (!session_found && session_name != NULL) {
		MSG("Session %s not found", session_name);
	}

	if (session_name == NULL) {
		MSG("\nUse lttng list <session_name> for more details");
	}

	return CMD_SUCCESS;

error:
	return ret;
}

/*
 * List available domain(s) for a session.
 */
static int list_domains(void)
{
	int i, count, ret = CMD_SUCCESS;
	struct lttng_domain *domains = NULL;

	MSG("Domains:\n-------------");

	count = lttng_list_domains(handle, &domains);
	if (count < 0) {
		ret = count;
		goto error;
	} else if (count == 0) {
		MSG("  None");
		goto end;
	}

	for (i = 0; i < count; i++) {
		switch (domains[i].type) {
		case LTTNG_DOMAIN_KERNEL:
			MSG("  - Kernel");
		default:
			break;
		}
	}

end:
	free(domains);

error:
	return ret;
}

/*
 * The 'list <options>' first level command
 */
int cmd_list(int argc, const char **argv)
{
	int opt, i, ret = CMD_SUCCESS;
	const char *session_name;
	static poptContext pc;
	struct lttng_domain domain;
	struct lttng_domain *domains = NULL;

	if (argc < 1) {
		usage(stderr);
		goto end;
	}

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

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stderr);
			goto end;
		default:
			usage(stderr);
			ret = CMD_UNDEFINED;
			goto end;
		}
	}

	if (opt_userspace || opt_pid != 0) {
		MSG("*** Userspace tracing not implemented ***\n");
	}

	/* Get session name (trailing argument) */
	session_name = poptGetArg(pc);
	DBG("Session name: %s", session_name);

	if (opt_kernel) {
		domain.type = LTTNG_DOMAIN_KERNEL;
	}

	handle = lttng_create_handle(session_name, &domain);
	if (handle == NULL) {
		goto end;
	}

	if (session_name == NULL) {
		if (opt_kernel) {
			ret = list_kernel_events();
			if (ret < 0) {
				goto end;
			}
		} else {
			ret = list_sessions(NULL);
			if (ret < 0) {
				goto end;
			}
		}
	} else {
		/* List session attributes */
		ret = list_sessions(session_name);
		if (ret < 0) {
			goto end;
		}

		/* Domain listing */
		if (opt_domain) {
			ret = list_domains();
			goto end;
		}

		if (opt_kernel) {
			/* Channel listing */
			ret = list_channels(opt_channel);
			if (ret < 0) {
				goto end;
			}
		} else if (opt_userspace) {
			/* TODO: Userspace domain */
		} else {
			/* We want all domain(s) */
			ret = lttng_list_domains(handle, &domains);
			if (ret < 0) {
				goto end;
			}

			for (i = 0; i < ret; i++) {
				switch (domains[i].type) {
				case LTTNG_DOMAIN_KERNEL:
					MSG("=== Domain: Kernel ===\n");
					break;
				default:
					MSG("=== Domain: Unimplemented ===\n");
					break;
				}

				/* Clean handle before creating a new one */
				lttng_destroy_handle(handle);

				handle = lttng_create_handle(session_name, &domains[i]);
				if (handle == NULL) {
					goto end;
				}

				ret = list_channels(opt_channel);
				if (ret < 0) {
					goto end;
				}
			}
		}
	}

end:
	if (domains) {
		free(domains);
	}
	lttng_destroy_handle(handle);

	return ret;
}
Commit	Line	Data
f3ed775e DG	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
82a3637f DG	6	* as published by the Free Software Foundation; only version 2
82a3637f DG	7	* of the License.
f3ed775e DG	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*/
	18
	19	#define _GNU_SOURCE
9f19cc17	20	#include <inttypes.h>
f3ed775e DG	21	#include <popt.h>
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25
6e2d116c	26	#include "../cmd.h"
f3ed775e DG	27
f3ed775e DG	28	static int opt_pid;
9f19cc17 DG	29	static int opt_userspace;
	30	static int opt_kernel;
	31	static char *opt_channel;
	32	static int opt_domain;
	33
	34	const char *indent4 = " ";
	35	const char *indent6 = " ";
	36	const char *indent8 = " ";
f3ed775e DG	37
	38	enum {
	39	OPT_HELP = 1,
f3ed775e DG	40	};
f3ed775e DG	41
cd80958d DG	42	static struct lttng_handle *handle;
cd80958d DG	43
f3ed775e DG	44	static struct poptOption long_options[] = {
	45	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	46	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
9f19cc17 DG	47	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	48	{"userspace", 'u', POPT_ARG_VAL, &opt_userspace, 1, 0, 0},
	49	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	50	{"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
	51	{"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
f3ed775e DG	52	{0, 0, 0, 0, 0, 0, 0}
	53	};
	54
	55	/*
	56	* usage
	57	*/
	58	static void usage(FILE *ofp)
	59	{
9f19cc17 DG	60	fprintf(ofp, "usage: lttng list [[-k] [-u] [-p PID] [SESSION [<options>]]]\n");
	61	fprintf(ofp, "\n");
	62	fprintf(ofp, "With no arguments, list available tracing session(s)\n");
	63	fprintf(ofp, "\n");
	64	fprintf(ofp, "With -k alone, list available kernel events\n");
	65	fprintf(ofp, "With -u alone, list available userspace events\n");
	66	fprintf(ofp, "\n");
	67	fprintf(ofp, " -h, --help Show this help\n");
	68	fprintf(ofp, " -k, --kernel Select kernel domain\n");
	69	fprintf(ofp, " -u, --userspace Select user-space domain.\n");
	70	fprintf(ofp, " -p, --pid PID List user-space events by PID\n");
f3ed775e	71	fprintf(ofp, "\n");
9f19cc17 DG	72	fprintf(ofp, "Options:\n");
	73	fprintf(ofp, " -c, --channel NAME List details of a channel\n");
	74	fprintf(ofp, " -d, --domain List available domain(s)\n");
f3ed775e DG	75	fprintf(ofp, "\n");
	76	}
	77
	78	/*
9f19cc17	79	* Get command line from /proc for a specific pid.
f3ed775e	80	*
9f19cc17 DG	81	* On success, return an allocated string pointer to the proc cmdline.
9f19cc17 DG	82	* On error, return NULL.
f3ed775e	83	*/
9f19cc17	84	#ifdef DISABLE
f3ed775e DG	85	static char *get_cmdline_by_pid(pid_t pid)
	86	{
	87	int ret;
	88	FILE *fp;
	89	char *cmdline = NULL;
	90	char path[24]; /* Can't go bigger than /proc/65535/cmdline */
	91
	92	snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
	93	fp = fopen(path, "r");
	94	if (fp == NULL) {
	95	goto end;
	96	}
	97
	98	/* Caller must free() cmdline /
	99	cmdline = malloc(PATH_MAX);
	100	ret = fread(cmdline, 1, PATH_MAX, fp);
f40799e8 DG	101	if (ret < 0) {
	102	perror("fread proc list");
	103	}
f3ed775e DG	104	fclose(fp);
	105
	106	end:
	107	return cmdline;
	108	}
9f19cc17	109	#endif /* DISABLE */
f3ed775e DG	110
f3ed775e DG	111	/*
9f19cc17	112	* Ask for all trace events in the kernel and pretty print them.
f3ed775e	113	*/
9f19cc17	114	static int list_kernel_events(void)
f3ed775e	115	{
9f19cc17 DG	116	int i, size;
9f19cc17 DG	117	struct lttng_event *event_list;
f3ed775e DG	118
	119	DBG("Getting all tracing events");
	120
cd80958d	121	size = lttng_list_tracepoints(handle, &event_list);
9f19cc17 DG	122	if (size < 0) {
	123	ERR("Unable to list kernel events");
	124	return size;
f3ed775e DG	125	}
f3ed775e DG	126
9f19cc17	127	MSG("Kernel events:\n-------------");
f3ed775e	128
9f19cc17 DG	129	for (i = 0; i < size; i++) {
9f19cc17 DG	130	MSG(" %s", event_list[i].name);
f3ed775e DG	131	}
	132
	133	free(event_list);
	134
	135	return CMD_SUCCESS;
	136	}
	137
	138	/*
9f19cc17	139	* List events of channel of session and domain.
f3ed775e	140	*/
cd80958d	141	static int list_events(const char *channel_name)
f3ed775e DG	142	{
f3ed775e DG	143	int ret, count, i;
9f19cc17	144	struct lttng_event *events = NULL;
f3ed775e	145
cd80958d	146	count = lttng_list_events(handle, channel_name, &events);
f3ed775e DG	147	if (count < 0) {
	148	ret = count;
	149	goto error;
	150	}
	151
9f19cc17 DG	152	MSG("\n%sEvents:", indent4);
	153	if (count == 0) {
	154	MSG("%sNone", indent6);
	155	goto end;
	156	}
	157
f3ed775e	158	for (i = 0; i < count; i++) {
9f19cc17 DG	159	switch (events[i].type) {
	160	case LTTNG_EVENT_TRACEPOINT:
	161	MSG("%s%s (type: tracepoint) [enabled: %d]", indent6,
	162	events[i].name, events[i].enabled);
	163	break;
	164	case LTTNG_EVENT_PROBE:
	165	MSG("%s%s (type: probe) [enabled: %d]", indent6,
	166	events[i].name, events[i].enabled);
	167	if (events[i].attr.probe.addr != 0) {
	168	MSG("%saddr: 0x%" PRIx64, indent8, events[i].attr.probe.addr);
	169	} else {
	170	MSG("%soffset: 0x%" PRIx64, indent8, events[i].attr.probe.offset);
	171	MSG("%ssymbol: %s", indent8, events[i].attr.probe.symbol_name);
	172	}
	173	break;
	174	case LTTNG_EVENT_FUNCTION:
	175	case LTTNG_EVENT_FUNCTION_ENTRY:
	176	MSG("%s%s (type: function) [enabled: %d]", indent6,
	177	events[i].name, events[i].enabled);
	178	MSG("%ssymbol: \"%s\"", indent8, events[i].attr.ftrace.symbol_name);
	179	break;
0133c199 MD	180	case LTTNG_EVENT_SYSCALLS:
	181	MSG("%s (type: syscalls) [enabled: %d]", indent6,
	182	events[i].enabled);
	183	break;
	184	case LTTNG_EVENT_NOOP:
	185	MSG("%s (type: noop) [enabled: %d]", indent6,
	186	events[i].enabled);
	187	break;
9f19cc17	188	}
f3ed775e DG	189	}
f3ed775e DG	190
9f19cc17	191	MSG("");
f3ed775e	192
9f19cc17 DG	193	end:
	194	if (events) {
	195	free(events);
	196	}
	197	ret = CMD_SUCCESS;
f3ed775e DG	198
	199	error:
	200	return ret;
	201	}
	202
	203	/*
9f19cc17 DG	204	* Pretty print channel
	205	*/
	206	static void print_channel(struct lttng_channel *channel)
	207	{
	208	MSG("- %s (enabled: %d):\n", channel->name, channel->enabled);
	209
	210	MSG("%sAttributes:", indent4);
	211	MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
	212	MSG("%ssubbufers size: %" PRIu64, indent6, channel->attr.subbuf_size);
	213	MSG("%snumber of subbufers: %" PRIu64, indent6, channel->attr.num_subbuf);
	214	MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
	215	MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
	216	switch (channel->attr.output) {
	217	case LTTNG_EVENT_SPLICE:
	218	MSG("%soutput: splice()", indent6);
	219	break;
	220	case LTTNG_EVENT_MMAP:
	221	MSG("%soutput: mmap()", indent6);
	222	break;
	223	}
	224	}
	225
	226	/*
	227	* List channel(s) of session and domain.
f3ed775e	228	*
9f19cc17	229	* If channel_name is NULL, all channels are listed.
f3ed775e	230	*/
cd80958d	231	static int list_channels(const char *channel_name)
f3ed775e	232	{
9f19cc17 DG	233	int count, i, ret = CMD_SUCCESS;
	234	unsigned int chan_found = 0;
	235	struct lttng_channel *channels = NULL;
f3ed775e	236
9f19cc17 DG	237	DBG("Listing channel(s) (%s)", channel_name);
9f19cc17 DG	238
cd80958d	239	count = lttng_list_channels(handle, &channels);
f3ed775e DG	240	if (count < 0) {
	241	ret = count;
	242	goto error;
9f19cc17 DG	243	} else if (count == 0) {
	244	MSG("No channel found");
	245	goto end;
f3ed775e DG	246	}
f3ed775e DG	247
9f19cc17 DG	248	if (channel_name == NULL) {
	249	MSG("Channels:\n-------------");
	250	}
	251
	252	for (i = 0; i < count; i++) {
	253	if (channel_name != NULL) {
	254	if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
	255	chan_found = 1;
	256	} else {
	257	continue;
	258	}
	259	}
	260	print_channel(&channels[i]);
	261
	262	/* Listing events per channel */
cd80958d	263	ret = list_events(channels[i].name);
9f19cc17 DG	264	if (ret < 0) {
	265	MSG("%s", lttng_get_readable_code(ret));
	266	}
	267
	268	if (chan_found) {
	269	break;
f3ed775e	270	}
f3ed775e DG	271	}
f3ed775e DG	272
9f19cc17 DG	273	if (!chan_found && channel_name != NULL) {
	274	MSG("Channel %s not found", channel_name);
	275	}
f3ed775e	276
9f19cc17 DG	277	end:
	278	free(channels);
	279	ret = CMD_SUCCESS;
f3ed775e DG	280
	281	error:
	282	return ret;
	283	}
	284
	285	/*
9f19cc17	286	* List available tracing session. List only basic information.
f3ed775e	287	*
9f19cc17	288	* If session_name is NULL, all sessions are listed.
f3ed775e	289	*/
9f19cc17	290	static int list_sessions(const char *session_name)
f3ed775e	291	{
9f19cc17 DG	292	int ret, count, i;
	293	unsigned int session_found = 0;
	294	struct lttng_session *sessions;
	295
	296	count = lttng_list_sessions(&sessions);
	297	DBG("Session count %d", count);
	298	if (count < 0) {
	299	ret = count;
	300	goto error;
	301	}
	302
	303	if (session_name == NULL) {
	304	MSG("Available tracing sessions:");
	305	}
	306
	307	for (i = 0; i < count; i++) {
	308	if (session_name != NULL) {
	309	if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
	310	session_found = 1;
	311	MSG("Tracing session %s:", session_name);
	312	MSG("%sTrace path: %s\n", indent4, sessions[i].path);
	313	break;
	314	}
cd80958d	315	continue;
9f19cc17 DG	316	}
	317
	318	MSG(" %d) %s (%s)", i + 1, sessions[i].name, sessions[i].path);
	319
	320	if (session_found) {
	321	break;
	322	}
	323	}
	324
	325	free(sessions);
	326
	327	if (!session_found && session_name != NULL) {
	328	MSG("Session %s not found", session_name);
	329	}
	330
	331	if (session_name == NULL) {
6e0de39b	332	MSG("\nUse lttng list <session_name> for more details");
9f19cc17	333	}
f3ed775e DG	334
	335	return CMD_SUCCESS;
	336
	337	error:
	338	return ret;
	339	}
f3ed775e DG	340
f3ed775e DG	341	/*
9f19cc17	342	* List available domain(s) for a session.
f3ed775e	343	*/
cd80958d	344	static int list_domains(void)
f3ed775e	345	{
9f19cc17 DG	346	int i, count, ret = CMD_SUCCESS;
	347	struct lttng_domain *domains = NULL;
	348
	349	MSG("Domains:\n-------------");
	350
cd80958d	351	count = lttng_list_domains(handle, &domains);
9f19cc17 DG	352	if (count < 0) {
	353	ret = count;
	354	goto error;
	355	} else if (count == 0) {
	356	MSG(" None");
	357	goto end;
	358	}
	359
	360	for (i = 0; i < count; i++) {
	361	switch (domains[i].type) {
	362	case LTTNG_DOMAIN_KERNEL:
	363	MSG(" - Kernel");
	364	default:
	365	break;
	366	}
	367	}
	368
	369	end:
	370	free(domains);
	371
	372	error:
	373	return ret;
f3ed775e	374	}
f3ed775e DG	375
f3ed775e DG	376	/*
9f19cc17	377	* The 'list <options>' first level command
f3ed775e DG	378	*/
	379	int cmd_list(int argc, const char **argv)
	380	{
9f19cc17 DG	381	int opt, i, ret = CMD_SUCCESS;
9f19cc17 DG	382	const char *session_name;
f3ed775e	383	static poptContext pc;
9f19cc17 DG	384	struct lttng_domain domain;
9f19cc17 DG	385	struct lttng_domain *domains = NULL;
f3ed775e	386
9f19cc17	387	if (argc < 1) {
f3ed775e DG	388	usage(stderr);
	389	goto end;
	390	}
	391
	392	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	393	poptReadDefaultConfig(pc, 0);
	394
	395	while ((opt = poptGetNextOpt(pc)) != -1) {
	396	switch (opt) {
	397	case OPT_HELP:
	398	usage(stderr);
	399	goto end;
f3ed775e DG	400	default:
	401	usage(stderr);
	402	ret = CMD_UNDEFINED;
	403	goto end;
	404	}
	405	}
	406
9f19cc17 DG	407	if (opt_userspace \|\| opt_pid != 0) {
9f19cc17 DG	408	MSG("* Userspace tracing not implemented *\n");
f3ed775e DG	409	}
f3ed775e DG	410
9f19cc17 DG	411	/* Get session name (trailing argument) */
	412	session_name = poptGetArg(pc);
	413	DBG("Session name: %s", session_name);
	414
cd80958d DG	415	if (opt_kernel) {
	416	domain.type = LTTNG_DOMAIN_KERNEL;
	417	}
	418
	419	handle = lttng_create_handle(session_name, &domain);
	420	if (handle == NULL) {
	421	goto end;
	422	}
	423
9f19cc17 DG	424	if (session_name == NULL) {
	425	if (opt_kernel) {
	426	ret = list_kernel_events();
	427	if (ret < 0) {
	428	goto end;
	429	}
	430	} else {
	431	ret = list_sessions(NULL);
	432	if (ret < 0) {
	433	goto end;
	434	}
	435	}
	436	} else {
	437	/* List session attributes */
	438	ret = list_sessions(session_name);
	439	if (ret < 0) {
	440	goto end;
	441	}
	442
	443	/* Domain listing */
	444	if (opt_domain) {
cd80958d	445	ret = list_domains();
9f19cc17 DG	446	goto end;
	447	}
	448
	449	if (opt_kernel) {
9f19cc17	450	/* Channel listing */
cd80958d	451	ret = list_channels(opt_channel);
9f19cc17 DG	452	if (ret < 0) {
	453	goto end;
	454	}
	455	} else if (opt_userspace) {
	456	/* TODO: Userspace domain */
	457	} else {
	458	/* We want all domain(s) */
cd80958d	459	ret = lttng_list_domains(handle, &domains);
9f19cc17 DG	460	if (ret < 0) {
	461	goto end;
	462	}
	463
	464	for (i = 0; i < ret; i++) {
	465	switch (domains[i].type) {
	466	case LTTNG_DOMAIN_KERNEL:
	467	MSG("=== Domain: Kernel ===\n");
	468	break;
	469	default:
	470	MSG("=== Domain: Unimplemented ===\n");
	471	break;
	472	}
	473
cd80958d DG	474	/* Clean handle before creating a new one */
	475	lttng_destroy_handle(handle);
	476
	477	handle = lttng_create_handle(session_name, &domains[i]);
	478	if (handle == NULL) {
	479	goto end;
	480	}
	481
	482	ret = list_channels(opt_channel);
9f19cc17 DG	483	if (ret < 0) {
	484	goto end;
	485	}
	486	}
	487	}
f3ed775e DG	488	}
	489
	490	end:
9f19cc17 DG	491	if (domains) {
	492	free(domains);
	493	}
cd80958d DG	494	lttng_destroy_handle(handle);
cd80958d DG	495
f3ed775e DG	496	return ret;
f3ed775e DG	497	}