[lttng-tools.git] / src / bin / lttng / commands / create.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
#include <assert.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include "../command.h"
#include "../utils.h"

#include <common/defaults.h>
#include <common/sessiond-comm/sessiond-comm.h>
#include <common/uri.h>
#include <common/utils.h>

static char *opt_output_path;
static char *opt_session_name;
static char *opt_url;
static char *opt_ctrl_url;
static char *opt_data_url;
static int opt_no_consumer;
static int opt_no_output;
static int opt_disable_consumer;

enum {
	OPT_HELP = 1,
	OPT_LIST_OPTIONS,
};

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL},
	{"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL},
	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{"set-url",        'U', POPT_ARG_STRING, &opt_url, 0, 0, 0},
	{"ctrl-url",       'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0},
	{"data-url",       'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0},
	{"no-output",       0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0},
	{"no-consumer",     0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0},
	{"disable-consumer", 0, POPT_ARG_VAL, &opt_disable_consumer, 1, 0, 0},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on
 * why this declaration exists and used ONLY in for this command.
 */
extern int _lttng_create_session_ext(const char *name, const char *url,
		const char *datetime);

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng create [NAME] [OPTIONS] \n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Without a given NAME, the default is 'auto-<yyyymmdd>-<hhmmss>'\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, "  -o, --output PATH    Specify output path for traces\n");
	fprintf(ofp, "      --no-output      Traces will not be outputed\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Extended Options:\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Using these options, each API call can be controlled individually.\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  -U, --set-url=URL    Set URL destination of the trace data.\n");
	fprintf(ofp, "                       It is persistent for the session lifetime.\n");
	fprintf(ofp, "                       This will set both data and control URL.\n");
	fprintf(ofp, "                       You can change it with the enable-consumer cmd\n");
	fprintf(ofp, "  -C, --ctrl-url=URL   Set control path URL. (Must use -D also)\n");
	fprintf(ofp, "  -D, --data-url=URL   Set data path URL. (Must use -C also)\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Please refer to the man page (lttng(1)) for more information on network\n");
	fprintf(ofp, "streaming mechanisms and explanation of the control and data port\n");
	fprintf(ofp, "You must have a running remote lttng-relayd for network streaming\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "URL format is has followed:\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  proto://[HOST|IP][:PORT1[:PORT2]][/TRACE_PATH]\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  Supported protocols are (proto):\n");
	fprintf(ofp, "  > file://...\n");
	fprintf(ofp, "    Local filesystem full path.\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  > net[6]://...\n");
	fprintf(ofp, "    This will use the default network transport layer which is\n");
	fprintf(ofp, "    TCP for both control (PORT1) and data port (PORT2).\n");
	fprintf(ofp, "    The default ports are respectively 5342 and 5343.\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  > tcp[6]://...\n");
	fprintf(ofp, "    Can only be used with -C and -D together\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "NOTE: IPv6 address MUST be enclosed in brackets '[]' (rfc2732)\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Examples:\n");
	fprintf(ofp, "    # lttng create -U net://192.168.1.42\n");
	fprintf(ofp, "    Uses TCP and default ports for the given destination.\n");
	fprintf(ofp, "    # lttng create -U net6://[fe80::f66d:4ff:fe53:d220]\n");
	fprintf(ofp, "    Uses TCP, default ports and IPv6.\n");
	fprintf(ofp, "    # lttng create s1 -U net://myhost.com:3229\n");
	fprintf(ofp, "    Set the consumer to the remote HOST on port 3229 for control.\n");
	fprintf(ofp, "\n");
}

/*
 * For a session name, set the consumer URLs.
 */
static int set_consumer_url(const char *session_name, const char *ctrl_url,
		const char *data_url)
{
	int ret;
	struct lttng_handle *handle;
	struct lttng_domain dom;

	assert(session_name);

	/*
	 * Set handle with the session name and the domain set to 0. This means to
	 * the session daemon that the next action applies on the tracing session
	 * rather then the domain specific session.
	 */
	memset(&dom, 0, sizeof(dom));

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

	ret = lttng_set_consumer_url(handle, ctrl_url, data_url);
	if (ret < 0) {
		goto error;
	}

	if (ctrl_url) {
		MSG("Control URL %s set for session %s", ctrl_url, session_name);
	}

	if (data_url) {
		MSG("Data URL %s set for session %s", data_url, session_name);
	}

error:
	lttng_destroy_handle(handle);
	return ret;
}

/*
 *  Create a tracing session.
 *  If no name is specified, a default name is generated.
 *
 *  Returns one of the CMD_* result constants.
 */
static int create_session(void)
{
	int ret;
	char *session_name = NULL, *traces_path = NULL, *alloc_path = NULL;
	char *alloc_url = NULL, *url = NULL, datetime[16];
	char session_name_date[NAME_MAX + 17], *print_str_url = NULL;
	time_t rawtime;
	struct tm *timeinfo;

	/* Get date and time for automatic session name/path */
	time(&rawtime);
	timeinfo = localtime(&rawtime);
	strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);

	/* Auto session name creation */
	if (opt_session_name == NULL) {
		ret = snprintf(session_name_date, sizeof(session_name_date),
				DEFAULT_SESSION_NAME "-%s", datetime);
		if (ret < 0) {
			PERROR("snprintf session name");
			goto error;
		}
		session_name = session_name_date;
		DBG("Auto session name set to %s", session_name_date);
	} else {
		if (strlen(opt_session_name) > NAME_MAX) {
			ERR("Session name too long. Length must be lower or equal to %d",
					NAME_MAX);
			ret = LTTNG_ERR_SESSION_FAIL;
			goto error;
		}
		/*
		 * Check if the session name begins with "auto-" or is exactly "auto".
		 * Both are reserved for the default session name. See bug #449 to
		 * understand why we need to check both here.
		 */
		if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-",
					strlen(DEFAULT_SESSION_NAME) + 1) == 0) ||
				(strncmp(opt_session_name, DEFAULT_SESSION_NAME,
					strlen(DEFAULT_SESSION_NAME)) == 0 &&
				strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) {
			ERR("%s is a reserved keyword for default session(s)",
					DEFAULT_SESSION_NAME);
			ret = CMD_ERROR;
			goto error;
		}
		session_name = opt_session_name;
		ret = snprintf(session_name_date, sizeof(session_name_date),
				"%s-%s", session_name, datetime);
		if (ret < 0) {
			PERROR("snprintf session name");
			goto error;
		}
	}

	if (opt_output_path != NULL) {
		traces_path = utils_expand_path(opt_output_path);
		if (traces_path == NULL) {
			ret = CMD_ERROR;
			goto error;
		}

		/* Create URL string from the local filesytem path */
		ret = asprintf(&alloc_url, "file://%s", traces_path);
		if (ret < 0) {
			PERROR("asprintf url path");
			ret = CMD_FATAL;
			goto error;
		}
		/* URL to use in the lttng_create_session() call */
		url = alloc_url;
		print_str_url = traces_path;
	} else if (opt_url) { /* Handling URL (-U opt) */
		url = opt_url;
		print_str_url = url;
	} else if (!opt_no_output) {
		/* Auto output path */
		alloc_path = utils_get_home_dir();
		if (alloc_path == NULL) {
			ERR("HOME path not found.\n \
					Please specify an output path using -o, --output PATH");
			ret = CMD_FATAL;
			goto error;
		}
		alloc_path = strdup(alloc_path);

		ret = asprintf(&alloc_url,
				"file://%s/" DEFAULT_TRACE_DIR_NAME "/%s",
				alloc_path, session_name_date);
		if (ret < 0) {
			PERROR("asprintf trace dir name");
			ret = CMD_FATAL;
			goto error;
		}

		url = alloc_url;
		if (!opt_data_url && !opt_ctrl_url) {
			print_str_url = alloc_url + strlen("file://");
		}
	} else {
		/* No output means --no-output. */
		url = NULL;
	}

	if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) {
		ERR("You need both control and data URL.");
		ret = CMD_ERROR;
		goto error;
	}

	ret = _lttng_create_session_ext(session_name, url, datetime);
	if (ret < 0) {
		/* Don't set ret so lttng can interpret the sessiond error. */
		switch (-ret) {
		case LTTNG_ERR_EXIST_SESS:
			WARN("Session %s already exists", session_name);
			break;
		default:
			break;
		}
		goto error;
	}

	if (opt_ctrl_url && opt_data_url) {
		/* Setting up control URI (-C or/and -D opt) */
		ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url);
		if (ret < 0) {
			/* Destroy created session because the URL are not valid. */
			lttng_destroy_session(session_name);
			goto error;
		}
	}

	MSG("Session %s created.", session_name);
	if (print_str_url) {
		MSG("Traces will be written in %s", print_str_url);
	}

	/* Init lttng session config */
	ret = config_init(session_name);
	if (ret < 0) {
		ret = CMD_ERROR;
		goto error;
	}

	ret = CMD_SUCCESS;

error:
	free(alloc_url);
	free(traces_path);
	free(alloc_path);

	if (ret < 0) {
		ERR("%s", lttng_strerror(ret));
	}
	return ret;
}

/*
 *  The 'create <options>' first level command
 *
 *  Returns one of the CMD_* result constants.
 */
int cmd_create(int argc, const char **argv)
{
	int opt, ret = CMD_SUCCESS;
	static poptContext pc;

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

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

	if (opt_no_consumer) {
		MSG("The option --no-consumer is obsolete. Use --no-output now.");
		ret = CMD_WARNING;
		goto end;
	}

	if (opt_disable_consumer) {
		MSG("The option --disable-consumer is obsolete.");
		ret = CMD_WARNING;
		goto end;
	}

	opt_session_name = (char*) poptGetArg(pc);

	ret = create_session();

end:
	poptFreeContext(pc);
	return ret;
}
Commit	Line	Data
f3ed775e 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.
f3ed775e 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.
f3ed775e DG	16	*/
	17
	18	#define _GNU_SOURCE
a4b92340	19	#include <assert.h>
f3ed775e 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 <time.h>
	27	#include <unistd.h>
	28
c399183f	29	#include "../command.h"
679b4943	30	#include "../utils.h"
f3ed775e	31
00e2e675	32	#include <common/defaults.h>
42224349	33	#include <common/sessiond-comm/sessiond-comm.h>
00e2e675	34	#include <common/uri.h>
81b86775	35	#include <common/utils.h>
42224349	36
f3ed775e DG	37	static char *opt_output_path;
f3ed775e DG	38	static char *opt_session_name;
a4b92340 DG	39	static char *opt_url;
	40	static char *opt_ctrl_url;
	41	static char *opt_data_url;
	42	static int opt_no_consumer;
2bba9e53	43	static int opt_no_output;
a4b92340	44	static int opt_disable_consumer;
f3ed775e DG	45
	46	enum {
	47	OPT_HELP = 1,
679b4943	48	OPT_LIST_OPTIONS,
f3ed775e DG	49	};
	50
	51	static struct poptOption long_options[] = {
	52	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
679b4943 SM	53	{"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL},
	54	{"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL},
	55	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
23d14dff DG	56	{"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0},
	57	{"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0},
	58	{"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0},
2bba9e53 DG	59	{"no-output", 0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0},
2bba9e53 DG	60	{"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0},
a4b92340	61	{"disable-consumer", 0, POPT_ARG_VAL, &opt_disable_consumer, 1, 0, 0},
f3ed775e DG	62	{0, 0, 0, 0, 0, 0, 0}
	63	};
	64
16de1a24 DG	65	/*
	66	* Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on
	67	* why this declaration exists and used ONLY in for this command.
	68	*/
07424f16 DG	69	extern int _lttng_create_session_ext(const char name, const char url,
	70	const char *datetime);
	71
f3ed775e DG	72	/*
	73	* usage
	74	*/
	75	static void usage(FILE *ofp)
	76	{
a4b92340	77	fprintf(ofp, "usage: lttng create [NAME] [OPTIONS] \n");
f3ed775e	78	fprintf(ofp, "\n");
a4b92340 DG	79	fprintf(ofp, "Without a given NAME, the default is 'auto-<yyyymmdd>-<hhmmss>'\n");
	80	fprintf(ofp, "\n");
	81	fprintf(ofp, "Options:\n");
f3ed775e	82	fprintf(ofp, " -h, --help Show this help\n");
1c8d13c8	83	fprintf(ofp, " --list-options Simple listing of options\n");
58a97671	84	fprintf(ofp, " -o, --output PATH Specify output path for traces\n");
2bba9e53	85	fprintf(ofp, " --no-output Traces will not be outputed\n");
a4b92340 DG	86	fprintf(ofp, "\n");
	87	fprintf(ofp, "Extended Options:\n");
	88	fprintf(ofp, "\n");
	89	fprintf(ofp, "Using these options, each API call can be controlled individually.\n");
	90	fprintf(ofp, "\n");
	91	fprintf(ofp, " -U, --set-url=URL Set URL destination of the trace data.\n");
00e2e675	92	fprintf(ofp, " It is persistent for the session lifetime.\n");
a4b92340 DG	93	fprintf(ofp, " This will set both data and control URL.\n");
	94	fprintf(ofp, " You can change it with the enable-consumer cmd\n");
	95	fprintf(ofp, " -C, --ctrl-url=URL Set control path URL. (Must use -D also)\n");
	96	fprintf(ofp, " -D, --data-url=URL Set data path URL. (Must use -C also)\n");
a4b92340 DG	97	fprintf(ofp, "\n");
	98	fprintf(ofp, "Please refer to the man page (lttng(1)) for more information on network\n");
	99	fprintf(ofp, "streaming mechanisms and explanation of the control and data port\n");
	100	fprintf(ofp, "You must have a running remote lttng-relayd for network streaming\n");
	101	fprintf(ofp, "\n");
	102	fprintf(ofp, "URL format is has followed:\n");
	103	fprintf(ofp, "\n");
	104	fprintf(ofp, " proto://[HOST\|IP][:PORT1[:PORT2]][/TRACE_PATH]\n");
	105	fprintf(ofp, "\n");
	106	fprintf(ofp, " Supported protocols are (proto):\n");
	107	fprintf(ofp, " > file://...\n");
	108	fprintf(ofp, " Local filesystem full path.\n");
	109	fprintf(ofp, "\n");
16de1a24	110	fprintf(ofp, " > net[6]://...\n");
a4b92340 DG	111	fprintf(ofp, " This will use the default network transport layer which is\n");
	112	fprintf(ofp, " TCP for both control (PORT1) and data port (PORT2).\n");
	113	fprintf(ofp, " The default ports are respectively 5342 and 5343.\n");
	114	fprintf(ofp, "\n");
0ab61906	115	fprintf(ofp, " > tcp[6]://...\n");
a4b92340 DG	116	fprintf(ofp, " Can only be used with -C and -D together\n");
	117	fprintf(ofp, "\n");
	118	fprintf(ofp, "NOTE: IPv6 address MUST be enclosed in brackets '[]' (rfc2732)\n");
	119	fprintf(ofp, "\n");
	120	fprintf(ofp, "Examples:\n");
	121	fprintf(ofp, " # lttng create -U net://192.168.1.42\n");
	122	fprintf(ofp, " Uses TCP and default ports for the given destination.\n");
	123	fprintf(ofp, " # lttng create -U net6://[fe80::f66d:4ff:fe53:d220]\n");
	124	fprintf(ofp, " Uses TCP, default ports and IPv6.\n");
	125	fprintf(ofp, " # lttng create s1 -U net://myhost.com:3229\n");
	126	fprintf(ofp, " Set the consumer to the remote HOST on port 3229 for control.\n");
f3ed775e DG	127	fprintf(ofp, "\n");
	128	}
	129
00e2e675	130	/*
a4b92340	131	* For a session name, set the consumer URLs.
00e2e675	132	*/
a4b92340 DG	133	static int set_consumer_url(const char session_name, const char ctrl_url,
a4b92340 DG	134	const char *data_url)
00e2e675	135	{
a4b92340 DG	136	int ret;
	137	struct lttng_handle *handle;
	138	struct lttng_domain dom;
	139
	140	assert(session_name);
	141
	142	/*
	143	* Set handle with the session name and the domain set to 0. This means to
	144	* the session daemon that the next action applies on the tracing session
	145	* rather then the domain specific session.
	146	*/
	147	memset(&dom, 0, sizeof(dom));
	148
	149	handle = lttng_create_handle(session_name, &dom);
	150	if (handle == NULL) {
	151	ret = CMD_FATAL;
	152	goto error;
	153	}
00e2e675	154
a4b92340 DG	155	ret = lttng_set_consumer_url(handle, ctrl_url, data_url);
	156	if (ret < 0) {
	157	goto error;
00e2e675 DG	158	}
00e2e675 DG	159
a4b92340 DG	160	if (ctrl_url) {
a4b92340 DG	161	MSG("Control URL %s set for session %s", ctrl_url, session_name);
00e2e675 DG	162	}
00e2e675 DG	163
a4b92340 DG	164	if (data_url) {
	165	MSG("Data URL %s set for session %s", data_url, session_name);
	166	}
	167
	168	error:
	169	lttng_destroy_handle(handle);
	170	return ret;
	171	}
	172
f3ed775e	173	/*
1c8d13c8 TD	174	* Create a tracing session.
1c8d13c8 TD	175	* If no name is specified, a default name is generated.
f3ed775e	176	*
1c8d13c8	177	* Returns one of the CMD_* result constants.
f3ed775e	178	*/
a4b92340	179	static int create_session(void)
f3ed775e	180	{
a4b92340	181	int ret;
07424f16	182	char session_name = NULL, traces_path = NULL, *alloc_path = NULL;
a4b92340	183	char alloc_url = NULL, url = NULL, datetime[16];
487b253b	184	char session_name_date[NAME_MAX + 17], *print_str_url = NULL;
f3ed775e DG	185	time_t rawtime;
	186	struct tm *timeinfo;
	187
d6175221 DG	188	/* Get date and time for automatic session name/path */
	189	time(&rawtime);
	190	timeinfo = localtime(&rawtime);
	191	strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
	192
f3ed775e DG	193	/* Auto session name creation */
f3ed775e DG	194	if (opt_session_name == NULL) {
07424f16 DG	195	ret = snprintf(session_name_date, sizeof(session_name_date),
07424f16 DG	196	DEFAULT_SESSION_NAME "-%s", datetime);
d6175221	197	if (ret < 0) {
07424f16 DG	198	PERROR("snprintf session name");
	199	goto error;
	200	}
04965770	201	session_name = session_name_date;
07424f16	202	DBG("Auto session name set to %s", session_name_date);
f3ed775e	203	} else {
487b253b DG	204	if (strlen(opt_session_name) > NAME_MAX) {
	205	ERR("Session name too long. Length must be lower or equal to %d",
	206	NAME_MAX);
	207	ret = LTTNG_ERR_SESSION_FAIL;
	208	goto error;
	209	}
4b861950 DG	210	/*
	211	* Check if the session name begins with "auto-" or is exactly "auto".
	212	* Both are reserved for the default session name. See bug #449 to
	213	* understand why we need to check both here.
	214	*/
	215	if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-",
	216	strlen(DEFAULT_SESSION_NAME) + 1) == 0) \|\|
	217	(strncmp(opt_session_name, DEFAULT_SESSION_NAME,
61b35a5a	218	strlen(DEFAULT_SESSION_NAME)) == 0 &&
4b861950	219	strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) {
61b35a5a DG	220	ERR("%s is a reserved keyword for default session(s)",
	221	DEFAULT_SESSION_NAME);
	222	ret = CMD_ERROR;
	223	goto error;
	224	}
f3ed775e	225	session_name = opt_session_name;
07424f16 DG	226	ret = snprintf(session_name_date, sizeof(session_name_date),
	227	"%s-%s", session_name, datetime);
	228	if (ret < 0) {
	229	PERROR("snprintf session name");
	230	goto error;
	231	}
f3ed775e DG	232	}
f3ed775e DG	233
785d2d0d	234	if (opt_output_path != NULL) {
81b86775	235	traces_path = utils_expand_path(opt_output_path);
00e2e675 DG	236	if (traces_path == NULL) {
	237	ret = CMD_ERROR;
	238	goto error;
	239	}
	240
a4b92340 DG	241	/* Create URL string from the local filesytem path */
a4b92340 DG	242	ret = asprintf(&alloc_url, "file://%s", traces_path);
00e2e675	243	if (ret < 0) {
a4b92340	244	PERROR("asprintf url path");
00e2e675 DG	245	ret = CMD_FATAL;
	246	goto error;
	247	}
a4b92340 DG	248	/* URL to use in the lttng_create_session() call */
a4b92340 DG	249	url = alloc_url;
40b03f52	250	print_str_url = traces_path;
a4b92340 DG	251	} else if (opt_url) { /* Handling URL (-U opt) */
a4b92340 DG	252	url = opt_url;
40b03f52	253	print_str_url = url;
2bba9e53	254	} else if (!opt_no_output) {
00e2e675	255	/* Auto output path */
feb0f3e5	256	alloc_path = utils_get_home_dir();
f3ed775e	257	if (alloc_path == NULL) {
d386b234	258	ERR("HOME path not found.\n \
00e2e675	259	Please specify an output path using -o, --output PATH");
f3ed775e DG	260	ret = CMD_FATAL;
	261	goto error;
	262	}
d386b234	263	alloc_path = strdup(alloc_path);
f3ed775e	264
07424f16 DG	265	ret = asprintf(&alloc_url,
	266	"file://%s/" DEFAULT_TRACE_DIR_NAME "/%s",
	267	alloc_path, session_name_date);
58a97671	268	if (ret < 0) {
00e2e675 DG	269	PERROR("asprintf trace dir name");
00e2e675 DG	270	ret = CMD_FATAL;
58a97671 DG	271	goto error;
58a97671 DG	272	}
00e2e675	273
a4b92340	274	url = alloc_url;
4f50c803 DG	275	if (!opt_data_url && !opt_ctrl_url) {
	276	print_str_url = alloc_url + strlen("file://");
	277	}
2bba9e53 DG	278	} else {
	279	/* No output means --no-output. */
	280	url = NULL;
00e2e675 DG	281	}
00e2e675 DG	282
4f50c803 DG	283	if ((!opt_ctrl_url && opt_data_url) \|\| (opt_ctrl_url && !opt_data_url)) {
	284	ERR("You need both control and data URL.");
	285	ret = CMD_ERROR;
	286	goto error;
	287	}
785d2d0d	288
07424f16	289	ret = _lttng_create_session_ext(session_name, url, datetime);
f3ed775e	290	if (ret < 0) {
ae856491	291	/* Don't set ret so lttng can interpret the sessiond error. */
42224349	292	switch (-ret) {
f73fabfd	293	case LTTNG_ERR_EXIST_SESS:
42224349 DG	294	WARN("Session %s already exists", session_name);
42224349 DG	295	break;
60e835ca	296	default:
60e835ca	297	break;
42224349	298	}
f3ed775e DG	299	goto error;
	300	}
	301
0ab61906	302	if (opt_ctrl_url && opt_data_url) {
a4b92340 DG	303	/* Setting up control URI (-C or/and -D opt) */
	304	ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url);
	305	if (ret < 0) {
4f50c803 DG	306	/* Destroy created session because the URL are not valid. */
4f50c803 DG	307	lttng_destroy_session(session_name);
a4b92340 DG	308	goto error;
a4b92340 DG	309	}
4f50c803 DG	310	}
	311
	312	MSG("Session %s created.", session_name);
	313	if (print_str_url) {
	314	MSG("Traces will be written in %s", print_str_url);
a4b92340 DG	315	}
a4b92340 DG	316
58a97671 DG	317	/* Init lttng session config */
58a97671 DG	318	ret = config_init(session_name);
f3ed775e	319	if (ret < 0) {
27089920	320	ret = CMD_ERROR;
f3ed775e DG	321	goto error;
	322	}
	323
f3ed775e DG	324	ret = CMD_SUCCESS;
	325
	326	error:
0e428499 DG	327	free(alloc_url);
0e428499 DG	328	free(traces_path);
87f222b6	329	free(alloc_path);
a4b92340 DG	330
	331	if (ret < 0) {
	332	ERR("%s", lttng_strerror(ret));
	333	}
f3ed775e DG	334	return ret;
	335	}
	336
	337	/*
74cc1d0f	338	* The 'create <options>' first level command
1c8d13c8 TD	339	*
1c8d13c8 TD	340	* Returns one of the CMD_* result constants.
f3ed775e DG	341	*/
	342	int cmd_create(int argc, const char **argv)
	343	{
	344	int opt, ret = CMD_SUCCESS;
	345	static poptContext pc;
	346
	347	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	348	poptReadDefaultConfig(pc, 0);
	349
	350	while ((opt = poptGetNextOpt(pc)) != -1) {
	351	switch (opt) {
	352	case OPT_HELP:
27089920	353	usage(stdout);
f3ed775e	354	goto end;
679b4943 SM	355	case OPT_LIST_OPTIONS:
679b4943 SM	356	list_cmd_options(stdout, long_options);
679b4943	357	goto end;
f3ed775e DG	358	default:
	359	usage(stderr);
	360	ret = CMD_UNDEFINED;
	361	goto end;
	362	}
	363	}
	364
785d2d0d	365	if (opt_no_consumer) {
2bba9e53	366	MSG("The option --no-consumer is obsolete. Use --no-output now.");
785d2d0d DG	367	ret = CMD_WARNING;
	368	goto end;
	369	}
	370
	371	if (opt_disable_consumer) {
	372	MSG("The option --disable-consumer is obsolete.");
	373	ret = CMD_WARNING;
	374	goto end;
	375	}
	376
f3ed775e DG	377	opt_session_name = (char*) poptGetArg(pc);
	378
	379	ret = create_session();
	380
	381	end:
ca1c3607	382	poptFreeContext(pc);
f3ed775e DG	383	return ret;
f3ed775e DG	384	}