[ust.git] / ust / ust.c

/* Copyright (C) 2009  Pierre-Marc Fournier
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include <stdlib.h>
#include <fcntl.h>
#include <regex.h>

#include "ustcomm.h"
#include "ustcmd.h"

enum command {
	START_TRACE,
	STOP_TRACE,
	START,
	DESTROY,
	LIST_MARKERS,
	ENABLE_MARKER,
	DISABLE_MARKER,
	GET_ONLINE_PIDS,
	UNKNOWN
};

struct ust_opts {
	enum command cmd;
	pid_t *pids;
	char* regex;
	regex_t preg;
	int regex_state;
};

char *progname = NULL;

void usage(void)
{
	fprintf(stderr, "usage: %s COMMAND PIDs...\n", progname);
	fprintf(stderr, "\nControl the tracing of a process that supports LTTng Userspace Tracing.\n\
\n\
Commands:\n\
    --start-trace\t\t\tStart tracing\n\
    --stop-trace\t\t\tStop tracing\n\
    --destroy-trace\t\t\tDestroy the trace\n\
    --enable-marker \"CHANNEL/MARKER\"\tEnable a marker\n\
    --disable-marker \"CHANNEL/MARKER\"\tDisable a marker\n\
    --list-markers\t\t\tList the markers of the process, their\n\t\t\t\t\t  state and format string\n\
\
");
}

int parse_opts_long(int argc, char **argv, struct ust_opts *opts)
{
	int c;

	opts->pids = NULL;
	opts->regex = NULL;
	opts->regex_state = -1;

	while (1) {
		int option_index = 0;
		static struct option long_options[] = {
			{"start-trace", 0, 0, 1000},
			{"stop-trace", 0, 0, 1001},
			{"destroy-trace", 0, 0, 1002},
			{"list-markers", 0, 0, 1004},
			{"print-markers", 0, 0, 1005},
			{"pid", 1, 0, 1006},
			{"enable-marker", 1, 0, 1007},
			{"disable-marker", 1, 0, 1008},
			{"start", 0, 0, 1009},
			{"help", 0, 0, 'h'},
			{"version", 0, 0, 1010},
			{"online-pids", 0, 0, 1011},
			{0, 0, 0, 0}
		};

		c = getopt_long(argc, argv, "h", long_options, &option_index);
		if (c == -1)
			break;

		switch (c) {
		case 0:
			printf("option %s", long_options[option_index].name);
			if (optarg)
				printf(" with arg %s", optarg);
			printf("\n");
			break;

		case 1000:
			opts->cmd = START_TRACE;
			break;
		case 1001:
			opts->cmd = STOP_TRACE;
			break;
		case 1009:
			opts->cmd = START;
			break;
		case 1002:
			opts->cmd = DESTROY;
			break;
		case 1004:
			opts->cmd = LIST_MARKERS;
			break;
		case 1007:
			opts->cmd = ENABLE_MARKER;
			opts->regex = strdup(optarg);
			break;
		case 1008:
			opts->cmd = DISABLE_MARKER;
			opts->regex = strdup(optarg);
			break;
		case 1011:
			opts->cmd = GET_ONLINE_PIDS;
			break;
		case 'h':
			usage();
			exit(0);
		case 1010:
			printf("Version 0.1\n");

		default:
			/* unknown option or other error; error is
			printed by getopt, just return */
			opts->cmd = UNKNOWN;
			return 1;
		}
	}

	if (argc - optind > 0 && opts->cmd != GET_ONLINE_PIDS) {
		int i;
		int pididx=0;
		opts->pids = malloc((argc-optind+1) * sizeof(pid_t));

		for(i=optind; i<argc; i++) {
			opts->pids[pididx++] = atoi(argv[i]);
		}
		opts->pids[pididx] = -1;
	}

	if (opts->cmd == ENABLE_MARKER || opts->cmd == DISABLE_MARKER) {
		if (opts->regex_state = regcomp(&opts->preg, opts->regex, 0)) {
			fprintf(stderr, "Invalid regular expression.\n");
		}
	}

	return 0;
}

static void regex_change_m_state(struct ust_opts* opts, pid_t pid) {
	struct USTcmd_cmsf* cmsf = NULL;
	unsigned int i = 0;
	int e = (opts->cmd == ENABLE_MARKER);

	if (opts->regex_state != 0) {
		return;
	}

	if (ustcmd_get_cmsf(&cmsf, pid)) {
		fprintf(stderr, "error while trying to get markers for PID "
			"%u\n", (unsigned int) pid);
		return;
	}
	while (cmsf[i].channel != NULL) {
		char* mc;
		asprintf(&mc, "%s/%s", cmsf[i].channel, cmsf[i].marker);
		if (regexec(&opts->preg, mc, 0, NULL, 0) == 0) {
			/* We got a match! */
			if (ustcmd_set_marker_state(mc,
			e ? USTCMD_MS_ON : USTCMD_MS_OFF, pid)) {
				fprintf(stderr,
					"error while trying to %sable marker"
					"\"%s\" for PID %u\n",
					e ? "en" : "dis", mc,
					(unsigned int) pid);
			} else {
				printf("sucessfully %sabled marker "
					"\"%s\" for PID %u\n",
					e ? "en" : "dis", mc,
					(unsigned int) pid);
			}
		}
		free(mc);
		++i;
	}
	ustcmd_free_cmsf(cmsf);
}

int main(int argc, char *argv[])
{
	pid_t *pidit;
	struct ustcomm_connection conn;
	int result;
	struct ust_opts opts;

	progname = argv[0];

	if(argc <= 1) {
		fprintf(stderr, "No operation specified.\n");
		usage();
		exit(EXIT_FAILURE);
	}

	result = parse_opts_long(argc, argv, &opts);
	if(result) {
		usage();
		exit(EXIT_FAILURE);
	}

	if(opts.pids == NULL && opts.cmd != GET_ONLINE_PIDS) {
		fprintf(stderr, "No pid specified.\n");
		usage();
		exit(EXIT_FAILURE);
	}
	if(opts.cmd == UNKNOWN) {
		fprintf(stderr, "No command specified.\n");
		usage();
		exit(EXIT_FAILURE);
	}
	if (opts.cmd == GET_ONLINE_PIDS) {
		pid_t* pp = ustcmd_get_online_pids();
		unsigned int i = 0;

		if (pp) {
			while (pp[i] != 0) {
				printf("%u\n", (unsigned int) pp[i]);
				++i;
			}
			free(pp);
		}

		exit(EXIT_SUCCESS);
	}

	pidit = opts.pids;
	struct USTcmd_cmsf* cmsf = NULL;

	while(*pidit != -1) {
		switch (opts.cmd) {
			case START_TRACE:
			if (ustcmd_start_trace(*pidit)) {
				fprintf(stderr,
					"error while trying to for trace "
					"with PID %u\n", (unsigned int) *pidit);
				break;
			}
			printf("sucessfully started trace for PID %u\n",
				(unsigned int) *pidit);
			break;

			case STOP_TRACE:
			if (ustcmd_stop_trace(*pidit)) {
				fprintf(stderr,
					"error while trying to stop trace "
					"for PID %u\n", (unsigned int) *pidit);
				break;
			}
			printf("sucessfully stopped trace for PID %u\n",
				(unsigned int) *pidit);
			break;

			case START:
			if (ustcmd_setup_and_start(*pidit)) {
				fprintf(stderr,
					"error while trying to setup/start "
					"trace for PID %u\n",
					(unsigned int) *pidit);
				break;
			}
			printf("sucessfully setup/started trace for PID %u\n",
				(unsigned int) *pidit);
			break;

			case DESTROY:
			if (ustcmd_destroy_trace(*pidit)) {
				fprintf(stderr,
					"error while trying to destroy "
					"trace with PID %u\n",
					(unsigned int) *pidit);
				break;
			}
			printf("sucessfully destroyed trace for PID %u\n",
				(unsigned int) *pidit);
			break;

			case LIST_MARKERS:
			cmsf = NULL;
			if (ustcmd_get_cmsf(&cmsf, *pidit)) {
				fprintf(stderr,
					"error while trying to list markers for"
					" PID %u\n", (unsigned int) *pidit);
				break;
			}
			unsigned int i = 0;
			while (cmsf[i].channel != NULL) {
				printf("{PID: %u, channel/marker: %s/%s, "
					"state: %u, fs: %s}\n",
					(unsigned int) *pidit,
					cmsf[i].channel,
					cmsf[i].marker,
					cmsf[i].state,
					cmsf[i].fs);
				++i;
			}
			ustcmd_free_cmsf(cmsf);
			break;

			case ENABLE_MARKER:
			case DISABLE_MARKER:
				regex_change_m_state(&opts, *pidit);
			break;

			default:
			fprintf(stderr, "error: unknown command...\n");
			break;
		}

		pidit++;
	}

	exit_free:
	if (opts.pids != NULL) {
		free(opts.pids);
	}
	if (opts.regex != NULL) {
		free(opts.regex);
	}

	return 0;
}
Commit	Line	Data
c39c72ee PMF	1	/* Copyright (C) 2009 Pierre-Marc Fournier
	2	*
	3	* This library is free software; you can redistribute it and/or
	4	* modify it under the terms of the GNU Lesser General Public
	5	* License as published by the Free Software Foundation; either
	6	* version 2.1 of the License, or (at your option) any later version.
	7	*
	8	* This library 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 GNU
	11	* Lesser General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU Lesser General Public
	14	* License along with this library; if not, write to the Free Software
	15	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	16	*/
	17
872037bb PMF	18	#define _GNU_SOURCE
872037bb PMF	19	#include <stdio.h>
fbd8191b PMF	20	#include <unistd.h>
	21	#include <getopt.h>
	22	#include <stdlib.h>
fbd8191b	23	#include <fcntl.h>
ef290fca	24	#include <regex.h>
fbd8191b	25
f9e5ce61	26	#include "ustcomm.h"
ae937656 PP	27	#include "ustcmd.h"
	28
	29	enum command {
	30	START_TRACE,
	31	STOP_TRACE,
	32	START,
	33	DESTROY,
	34	LIST_MARKERS,
	35	ENABLE_MARKER,
	36	DISABLE_MARKER,
	37	GET_ONLINE_PIDS,
	38	UNKNOWN
ef290fca	39	};
fbd8191b	40
52c51a47	41	struct ust_opts {
ae937656	42	enum command cmd;
52c51a47	43	pid_t *pids;
ef290fca PMF	44	char* regex;
	45	regex_t preg;
	46	int regex_state;
52c51a47 PMF	47	};
52c51a47 PMF	48
fd2fb4f9 PMF	49	char *progname = NULL;
	50
	51	void usage(void)
	52	{
ae937656	53	fprintf(stderr, "usage: %s COMMAND PIDs...\n", progname);
fd2fb4f9 PMF	54	fprintf(stderr, "\nControl the tracing of a process that supports LTTng Userspace Tracing.\n\
	55	\n\
	56	Commands:\n\
	57	--start-trace\t\t\tStart tracing\n\
	58	--stop-trace\t\t\tStop tracing\n\
	59	--destroy-trace\t\t\tDestroy the trace\n\
ae937656 PP	60	--enable-marker \"CHANNEL/MARKER\"\tEnable a marker\n\
	61	--disable-marker \"CHANNEL/MARKER\"\tDisable a marker\n\
	62	--list-markers\t\t\tList the markers of the process, their\n\t\t\t\t\t state and format string\n\
	63	\
fd2fb4f9 PMF	64	");
	65	}
	66
52c51a47	67	int parse_opts_long(int argc, char *argv, struct ust_opts opts)
fbd8191b	68	{
52c51a47	69	int c;
52c51a47	70
52c51a47	71	opts->pids = NULL;
ef290fca PMF	72	opts->regex = NULL;
ef290fca PMF	73	opts->regex_state = -1;
52c51a47 PMF	74
52c51a47 PMF	75	while (1) {
52c51a47 PMF	76	int option_index = 0;
	77	static struct option long_options[] = {
	78	{"start-trace", 0, 0, 1000},
	79	{"stop-trace", 0, 0, 1001},
	80	{"destroy-trace", 0, 0, 1002},
	81	{"list-markers", 0, 0, 1004},
	82	{"print-markers", 0, 0, 1005},
	83	{"pid", 1, 0, 1006},
	84	{"enable-marker", 1, 0, 1007},
	85	{"disable-marker", 1, 0, 1008},
	86	{"start", 0, 0, 1009},
d373b5cd PMF	87	{"help", 0, 0, 'h'},
d373b5cd PMF	88	{"version", 0, 0, 1010},
ae937656	89	{"online-pids", 0, 0, 1011},
52c51a47 PMF	90	{0, 0, 0, 0}
	91	};
	92
d373b5cd	93	c = getopt_long(argc, argv, "h", long_options, &option_index);
52c51a47 PMF	94	if (c == -1)
	95	break;
	96
	97	switch (c) {
	98	case 0:
	99	printf("option %s", long_options[option_index].name);
	100	if (optarg)
	101	printf(" with arg %s", optarg);
	102	printf("\n");
	103	break;
	104
	105	case 1000:
ae937656	106	opts->cmd = START_TRACE;
52c51a47 PMF	107	break;
52c51a47 PMF	108	case 1001:
ae937656	109	opts->cmd = STOP_TRACE;
52c51a47 PMF	110	break;
52c51a47 PMF	111	case 1009:
ae937656	112	opts->cmd = START;
52c51a47 PMF	113	break;
52c51a47 PMF	114	case 1002:
ae937656	115	opts->cmd = DESTROY;
52c51a47 PMF	116	break;
52c51a47 PMF	117	case 1004:
ae937656	118	opts->cmd = LIST_MARKERS;
52c51a47 PMF	119	break;
52c51a47 PMF	120	case 1007:
ae937656	121	opts->cmd = ENABLE_MARKER;
ef290fca	122	opts->regex = strdup(optarg);
52c51a47 PMF	123	break;
52c51a47 PMF	124	case 1008:
ae937656	125	opts->cmd = DISABLE_MARKER;
ef290fca	126	opts->regex = strdup(optarg);
ae937656 PP	127	break;
	128	case 1011:
	129	opts->cmd = GET_ONLINE_PIDS;
52c51a47	130	break;
d373b5cd PMF	131	case 'h':
	132	usage();
	133	exit(0);
	134	case 1010:
ae937656	135	printf("Version 0.1\n");
52c51a47 PMF	136
52c51a47 PMF	137	default:
ae937656 PP	138	/* unknown option or other error; error is
	139	printed by getopt, just return */
	140	opts->cmd = UNKNOWN;
52c51a47	141	return 1;
fbd8191b PMF	142	}
	143	}
	144
772030fe	145	if (argc - optind > 0 && opts->cmd != GET_ONLINE_PIDS) {
52c51a47 PMF	146	int i;
	147	int pididx=0;
	148	opts->pids = malloc((argc-optind+1) * sizeof(pid_t));
fbd8191b	149
52c51a47 PMF	150	for(i=optind; i<argc; i++) {
	151	opts->pids[pididx++] = atoi(argv[i]);
	152	}
	153	opts->pids[pididx] = -1;
fbd8191b PMF	154	}
fbd8191b PMF	155
772030fe PMF	156	if (opts->cmd == ENABLE_MARKER \|\| opts->cmd == DISABLE_MARKER) {
	157	if (opts->regex_state = regcomp(&opts->preg, opts->regex, 0)) {
	158	fprintf(stderr, "Invalid regular expression.\n");
	159	}
	160	}
	161
52c51a47 PMF	162	return 0;
52c51a47 PMF	163	}
fbd8191b	164
772030fe PMF	165	static void regex_change_m_state(struct ust_opts* opts, pid_t pid) {
	166	struct USTcmd_cmsf* cmsf = NULL;
	167	unsigned int i = 0;
	168	int e = (opts->cmd == ENABLE_MARKER);
	169
	170	if (opts->regex_state != 0) {
	171	return;
	172	}
	173
	174	if (ustcmd_get_cmsf(&cmsf, pid)) {
	175	fprintf(stderr, "error while trying to get markers for PID "
	176	"%u\n", (unsigned int) pid);
	177	return;
	178	}
	179	while (cmsf[i].channel != NULL) {
	180	char* mc;
	181	asprintf(&mc, "%s/%s", cmsf[i].channel, cmsf[i].marker);
	182	if (regexec(&opts->preg, mc, 0, NULL, 0) == 0) {
	183	/* We got a match! */
	184	if (ustcmd_set_marker_state(mc,
	185	e ? USTCMD_MS_ON : USTCMD_MS_OFF, pid)) {
	186	fprintf(stderr,
	187	"error while trying to %sable marker"
	188	"\"%s\" for PID %u\n",
	189	e ? "en" : "dis", mc,
	190	(unsigned int) pid);
	191	} else {
	192	printf("sucessfully %sabled marker "
	193	"\"%s\" for PID %u\n",
	194	e ? "en" : "dis", mc,
	195	(unsigned int) pid);
	196	}
	197	}
	198	free(mc);
	199	++i;
	200	}
	201	ustcmd_free_cmsf(cmsf);
	202	}
	203
fbd8191b PMF	204	int main(int argc, char *argv[])
fbd8191b PMF	205	{
52c51a47	206	pid_t *pidit;
52c51a47 PMF	207	struct ustcomm_connection conn;
	208	int result;
	209	struct ust_opts opts;
fbd8191b	210
52c51a47	211	progname = argv[0];
fbd8191b	212
52c51a47 PMF	213	if(argc <= 1) {
	214	fprintf(stderr, "No operation specified.\n");
	215	usage();
	216	exit(EXIT_FAILURE);
	217	}
	218
	219	result = parse_opts_long(argc, argv, &opts);
	220	if(result) {
	221	usage();
	222	exit(EXIT_FAILURE);
	223	}
	224
ae937656	225	if(opts.pids == NULL && opts.cmd != GET_ONLINE_PIDS) {
52c51a47 PMF	226	fprintf(stderr, "No pid specified.\n");
	227	usage();
	228	exit(EXIT_FAILURE);
	229	}
ae937656	230	if(opts.cmd == UNKNOWN) {
52c51a47 PMF	231	fprintf(stderr, "No command specified.\n");
	232	usage();
	233	exit(EXIT_FAILURE);
	234	}
ae937656 PP	235	if (opts.cmd == GET_ONLINE_PIDS) {
	236	pid_t* pp = ustcmd_get_online_pids();
	237	unsigned int i = 0;
52c51a47	238
ae937656 PP	239	if (pp) {
	240	while (pp[i] != 0) {
	241	printf("%u\n", (unsigned int) pp[i]);
	242	++i;
	243	}
	244	free(pp);
52c51a47	245	}
ef290fca	246
ae937656 PP	247	exit(EXIT_SUCCESS);
ae937656 PP	248	}
52c51a47	249
ae937656 PP	250	pidit = opts.pids;
ae937656 PP	251	struct USTcmd_cmsf* cmsf = NULL;
ef290fca	252
ae937656 PP	253	while(*pidit != -1) {
	254	switch (opts.cmd) {
	255	case START_TRACE:
	256	if (ustcmd_start_trace(*pidit)) {
	257	fprintf(stderr,
	258	"error while trying to for trace "
	259	"with PID %u\n", (unsigned int) *pidit);
	260	break;
	261	}
	262	printf("sucessfully started trace for PID %u\n",
	263	(unsigned int) *pidit);
	264	break;
ef290fca	265
ae937656 PP	266	case STOP_TRACE:
	267	if (ustcmd_stop_trace(*pidit)) {
	268	fprintf(stderr,
	269	"error while trying to stop trace "
	270	"for PID %u\n", (unsigned int) *pidit);
	271	break;
	272	}
	273	printf("sucessfully stopped trace for PID %u\n",
	274	(unsigned int) *pidit);
	275	break;
ef290fca	276
ae937656 PP	277	case START:
	278	if (ustcmd_setup_and_start(*pidit)) {
	279	fprintf(stderr,
	280	"error while trying to setup/start "
	281	"trace for PID %u\n",
	282	(unsigned int) *pidit);
	283	break;
	284	}
	285	printf("sucessfully setup/started trace for PID %u\n",
	286	(unsigned int) *pidit);
	287	break;
ef290fca	288
ae937656 PP	289	case DESTROY:
	290	if (ustcmd_destroy_trace(*pidit)) {
	291	fprintf(stderr,
	292	"error while trying to destroy "
	293	"trace with PID %u\n",
	294	(unsigned int) *pidit);
	295	break;
	296	}
	297	printf("sucessfully destroyed trace for PID %u\n",
	298	(unsigned int) *pidit);
	299	break;
ef290fca	300
ae937656 PP	301	case LIST_MARKERS:
	302	cmsf = NULL;
	303	if (ustcmd_get_cmsf(&cmsf, *pidit)) {
	304	fprintf(stderr,
	305	"error while trying to list markers for"
	306	" PID %u\n", (unsigned int) *pidit);
	307	break;
	308	}
	309	unsigned int i = 0;
	310	while (cmsf[i].channel != NULL) {
	311	printf("{PID: %u, channel/marker: %s/%s, "
	312	"state: %u, fs: %s}\n",
	313	(unsigned int) *pidit,
	314	cmsf[i].channel,
	315	cmsf[i].marker,
	316	cmsf[i].state,
	317	cmsf[i].fs);
	318	++i;
	319	}
	320	ustcmd_free_cmsf(cmsf);
	321	break;
ef290fca	322
ae937656	323	case ENABLE_MARKER:
ae937656	324	case DISABLE_MARKER:
ef290fca	325	regex_change_m_state(&opts, *pidit);
ae937656	326	break;
ef290fca	327
ae937656 PP	328	default:
	329	fprintf(stderr, "error: unknown command...\n");
	330	break;
	331	}
ef290fca	332
52c51a47 PMF	333	pidit++;
52c51a47 PMF	334	}
82b1a169	335
ef290fca PMF	336	exit_free:
	337	if (opts.pids != NULL) {
	338	free(opts.pids);
	339	}
	340	if (opts.regex != NULL) {
	341	free(opts.regex);
ae937656	342	}
fbd8191b PMF	343
	344	return 0;
	345	}
ae937656	346