[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_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-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, "\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, "      --no-consumer    Don't activate a consumer for this session.\n");
	fprintf(ofp, "      --disable-consumer\n");
	fprintf(ofp, "                       Disable consumer for this session.\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;
}

/*
 * For a session name, enable the consumer.
 */
static int enable_consumer(const char *session_name)
{
	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.
	 *
	 * XXX: This '0' value should be a domain enum value.
	 */
	memset(&dom, 0, sizeof(dom));

	handle = lttng_create_handle(session_name, 0);
	if (handle == NULL) {
		ret = CMD_FATAL;
		goto error;
	}

	ret = lttng_enable_consumer(handle);
	if (ret < 0) {
		goto error;
	}

	MSG("Consumer enabled for session %s", session_name);

error:
	lttng_destroy_handle(handle);
	return ret;
}

/*
 * For a session name, disable the consumer.
 */
static int disable_consumer(const char *session_name)
{
	int ret;
	struct lttng_handle *handle;

	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.
	 *
	 * XXX: This '0' value should be a domain enum value.
	 */
	handle = lttng_create_handle(session_name, 0);
	if (handle == NULL) {
		ret = CMD_FATAL;
		goto error;
	}

	ret = lttng_disable_consumer(handle);
	if (ret < 0) {
		goto error;
	}
	free(handle);

	MSG("Consumer disabled for session %s", session_name);

error:
	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_no_consumer) {
		url = NULL;
		print_str_url = "";
	} else 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_ctrl_url == NULL && opt_data_url == NULL) {
		/* Auto output path */
		alloc_path = config_get_default_path();
		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;
		print_str_url = alloc_url + strlen("file://");
	}

	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:
			ERR("%s", lttng_strerror(ret));
			break;
		}
		goto error;
	}

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

	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) {
			goto error;
		}

		ret = enable_consumer(session_name);
		if (ret < 0) {
			goto error;
		}
	} else 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;
	}

	if (opt_disable_consumer && !opt_no_consumer) {
		ret = disable_consumer(session_name);
		if (ret < 0) {
			goto error;
		}
	}

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


	ret = CMD_SUCCESS;

error:
	if (alloc_url) {
		free(alloc_url);
	}

	if (traces_path) {
		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;
		}
	}

	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;
	43	static int opt_disable_consumer;
f3ed775e DG	44
	45	enum {
	46	OPT_HELP = 1,
679b4943	47	OPT_LIST_OPTIONS,
f3ed775e DG	48	};
	49
	50	static struct poptOption long_options[] = {
	51	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
679b4943 SM	52	{"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL},
	53	{"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL},
	54	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
a59af249 DG	55	{"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0},
	56	{"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0},
	57	{"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0},
a4b92340 DG	58	{"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0},
a4b92340 DG	59	{"disable-consumer", 0, POPT_ARG_VAL, &opt_disable_consumer, 1, 0, 0},
f3ed775e DG	60	{0, 0, 0, 0, 0, 0, 0}
	61	};
	62
16de1a24 DG	63	/*
	64	* Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on
	65	* why this declaration exists and used ONLY in for this command.
	66	*/
07424f16 DG	67	extern int _lttng_create_session_ext(const char name, const char url,
	68	const char *datetime);
	69
f3ed775e DG	70	/*
	71	* usage
	72	*/
	73	static void usage(FILE *ofp)
	74	{
a4b92340	75	fprintf(ofp, "usage: lttng create [NAME] [OPTIONS] \n");
f3ed775e	76	fprintf(ofp, "\n");
a4b92340 DG	77	fprintf(ofp, "Without a given NAME, the default is 'auto-<yyyymmdd>-<hhmmss>'\n");
	78	fprintf(ofp, "\n");
	79	fprintf(ofp, "Options:\n");
f3ed775e	80	fprintf(ofp, " -h, --help Show this help\n");
1c8d13c8	81	fprintf(ofp, " --list-options Simple listing of options\n");
58a97671	82	fprintf(ofp, " -o, --output PATH Specify output path for traces\n");
a4b92340 DG	83	fprintf(ofp, "\n");
	84	fprintf(ofp, "Extended Options:\n");
	85	fprintf(ofp, "\n");
	86	fprintf(ofp, "Using these options, each API call can be controlled individually.\n");
	87	fprintf(ofp, "\n");
	88	fprintf(ofp, " -U, --set-url=URL Set URL destination of the trace data.\n");
00e2e675	89	fprintf(ofp, " It is persistent for the session lifetime.\n");
a4b92340 DG	90	fprintf(ofp, " This will set both data and control URL.\n");
	91	fprintf(ofp, " You can change it with the enable-consumer cmd\n");
	92	fprintf(ofp, " -C, --ctrl-url=URL Set control path URL. (Must use -D also)\n");
	93	fprintf(ofp, " -D, --data-url=URL Set data path URL. (Must use -C also)\n");
	94	fprintf(ofp, " --no-consumer Don't activate a consumer for this session.\n");
	95	fprintf(ofp, " --disable-consumer\n");
	96	fprintf(ofp, " Disable consumer for this session.\n");
	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
	173	/*
	174	* For a session name, enable the consumer.
	175	*/
	176	static int enable_consumer(const char *session_name)
	177	{
	178	int ret;
	179	struct lttng_handle *handle;
	180	struct lttng_domain dom;
	181
	182	assert(session_name);
	183
	184	/*
	185	* Set handle with the session name and the domain set to 0. This means to
	186	* the session daemon that the next action applies on the tracing session
	187	* rather then the domain specific session.
	188	*
	189	* XXX: This '0' value should be a domain enum value.
	190	*/
	191	memset(&dom, 0, sizeof(dom));
	192
	193	handle = lttng_create_handle(session_name, 0);
	194	if (handle == NULL) {
	195	ret = CMD_FATAL;
	196	goto error;
00e2e675 DG	197	}
00e2e675 DG	198
a4b92340 DG	199	ret = lttng_enable_consumer(handle);
	200	if (ret < 0) {
	201	goto error;
	202	}
	203
	204	MSG("Consumer enabled for session %s", session_name);
	205
	206	error:
	207	lttng_destroy_handle(handle);
	208	return ret;
00e2e675 DG	209	}
	210
	211	/*
a4b92340	212	* For a session name, disable the consumer.
00e2e675	213	*/
a4b92340	214	static int disable_consumer(const char *session_name)
00e2e675	215	{
a4b92340 DG	216	int ret;
	217	struct lttng_handle *handle;
	218
	219	assert(session_name);
	220
	221	/*
	222	* Set handle with the session name and the domain set to 0. This means to
	223	* the session daemon that the next action applies on the tracing session
	224	* rather then the domain specific session.
	225	*
	226	* XXX: This '0' value should be a domain enum value.
	227	*/
	228	handle = lttng_create_handle(session_name, 0);
	229	if (handle == NULL) {
	230	ret = CMD_FATAL;
	231	goto error;
00e2e675 DG	232	}
00e2e675 DG	233
a4b92340 DG	234	ret = lttng_disable_consumer(handle);
	235	if (ret < 0) {
	236	goto error;
	237	}
	238	free(handle);
00e2e675	239
a4b92340 DG	240	MSG("Consumer disabled for session %s", session_name);
	241
	242	error:
	243	return ret;
00e2e675 DG	244	}
00e2e675 DG	245
f3ed775e	246	/*
1c8d13c8 TD	247	* Create a tracing session.
1c8d13c8 TD	248	* If no name is specified, a default name is generated.
f3ed775e	249	*
1c8d13c8	250	* Returns one of the CMD_* result constants.
f3ed775e	251	*/
a4b92340	252	static int create_session(void)
f3ed775e	253	{
a4b92340	254	int ret;
07424f16	255	char session_name = NULL, traces_path = NULL, *alloc_path = NULL;
a4b92340	256	char alloc_url = NULL, url = NULL, datetime[16];
d4ec3d67	257	char session_name_date[NAME_MAX + 17], *print_str_url = NULL;
f3ed775e DG	258	time_t rawtime;
	259	struct tm *timeinfo;
	260
d6175221 DG	261	/* Get date and time for automatic session name/path */
	262	time(&rawtime);
	263	timeinfo = localtime(&rawtime);
	264	strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
	265
f3ed775e DG	266	/* Auto session name creation */
f3ed775e DG	267	if (opt_session_name == NULL) {
07424f16 DG	268	ret = snprintf(session_name_date, sizeof(session_name_date),
07424f16 DG	269	DEFAULT_SESSION_NAME "-%s", datetime);
d6175221	270	if (ret < 0) {
07424f16 DG	271	PERROR("snprintf session name");
	272	goto error;
	273	}
04965770	274	session_name = session_name_date;
07424f16	275	DBG("Auto session name set to %s", session_name_date);
f3ed775e	276	} else {
d4ec3d67 DG	277	if (strlen(opt_session_name) > NAME_MAX) {
	278	ERR("Session name too long. Length must be lower or equal to %d",
	279	NAME_MAX);
	280	ret = LTTNG_ERR_SESSION_FAIL;
	281	goto error;
	282	}
12d7ac5a DG	283	/*
	284	* Check if the session name begins with "auto-" or is exactly "auto".
	285	* Both are reserved for the default session name. See bug #449 to
	286	* understand why we need to check both here.
	287	*/
	288	if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-",
	289	strlen(DEFAULT_SESSION_NAME) + 1) == 0) \|\|
	290	(strncmp(opt_session_name, DEFAULT_SESSION_NAME,
61b35a5a	291	strlen(DEFAULT_SESSION_NAME)) == 0 &&
12d7ac5a	292	strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) {
61b35a5a DG	293	ERR("%s is a reserved keyword for default session(s)",
	294	DEFAULT_SESSION_NAME);
	295	ret = CMD_ERROR;
	296	goto error;
	297	}
f3ed775e	298	session_name = opt_session_name;
07424f16 DG	299	ret = snprintf(session_name_date, sizeof(session_name_date),
	300	"%s-%s", session_name, datetime);
	301	if (ret < 0) {
	302	PERROR("snprintf session name");
	303	goto error;
	304	}
f3ed775e DG	305	}
f3ed775e DG	306
a4b92340 DG	307	if (opt_no_consumer) {
a4b92340 DG	308	url = NULL;
40b03f52	309	print_str_url = "";
a4b92340	310	} else if (opt_output_path != NULL) {
81b86775	311	traces_path = utils_expand_path(opt_output_path);
00e2e675 DG	312	if (traces_path == NULL) {
	313	ret = CMD_ERROR;
	314	goto error;
	315	}
	316
a4b92340 DG	317	/* Create URL string from the local filesytem path */
a4b92340 DG	318	ret = asprintf(&alloc_url, "file://%s", traces_path);
00e2e675	319	if (ret < 0) {
a4b92340	320	PERROR("asprintf url path");
00e2e675 DG	321	ret = CMD_FATAL;
	322	goto error;
	323	}
a4b92340 DG	324	/* URL to use in the lttng_create_session() call */
a4b92340 DG	325	url = alloc_url;
40b03f52	326	print_str_url = traces_path;
a4b92340 DG	327	} else if (opt_url) { /* Handling URL (-U opt) */
a4b92340 DG	328	url = opt_url;
40b03f52	329	print_str_url = url;
a4b92340	330	} else if (opt_ctrl_url == NULL && opt_data_url == NULL) {
00e2e675	331	/* Auto output path */
d386b234	332	alloc_path = config_get_default_path();
f3ed775e	333	if (alloc_path == NULL) {
d386b234	334	ERR("HOME path not found.\n \
00e2e675	335	Please specify an output path using -o, --output PATH");
f3ed775e DG	336	ret = CMD_FATAL;
	337	goto error;
	338	}
d386b234	339	alloc_path = strdup(alloc_path);
f3ed775e	340
07424f16 DG	341	ret = asprintf(&alloc_url,
	342	"file://%s/" DEFAULT_TRACE_DIR_NAME "/%s",
	343	alloc_path, session_name_date);
58a97671	344	if (ret < 0) {
00e2e675 DG	345	PERROR("asprintf trace dir name");
00e2e675 DG	346	ret = CMD_FATAL;
58a97671 DG	347	goto error;
58a97671 DG	348	}
00e2e675	349
a4b92340	350	url = alloc_url;
40b03f52	351	print_str_url = alloc_url + strlen("file://");
00e2e675 DG	352	}
00e2e675 DG	353
07424f16	354	ret = _lttng_create_session_ext(session_name, url, datetime);
f3ed775e	355	if (ret < 0) {
ae856491	356	/* Don't set ret so lttng can interpret the sessiond error. */
42224349	357	switch (-ret) {
f73fabfd	358	case LTTNG_ERR_EXIST_SESS:
42224349 DG	359	WARN("Session %s already exists", session_name);
42224349 DG	360	break;
d7686e24 DG	361	default:
	362	ERR("%s", lttng_strerror(ret));
	363	break;
42224349	364	}
f3ed775e DG	365	goto error;
	366	}
	367
04965770	368	MSG("Session %s created.", session_name);
0ab61906 DG	369	if (print_str_url) {
	370	MSG("Traces will be written in %s", print_str_url);
	371	}
a4b92340	372
0ab61906	373	if (opt_ctrl_url && opt_data_url) {
a4b92340 DG	374	/* Setting up control URI (-C or/and -D opt) */
	375	ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url);
	376	if (ret < 0) {
	377	goto error;
	378	}
	379
	380	ret = enable_consumer(session_name);
	381	if (ret < 0) {
	382	goto error;
	383	}
0ab61906 DG	384	} else if ((!opt_ctrl_url && opt_data_url) \|\|
	385	(opt_ctrl_url && !opt_data_url)) {
	386	ERR("You need both control and data URL.");
	387	ret = CMD_ERROR;
	388	goto error;
a4b92340 DG	389	}
	390
	391	if (opt_disable_consumer && !opt_no_consumer) {
	392	ret = disable_consumer(session_name);
	393	if (ret < 0) {
	394	goto error;
	395	}
	396	}
	397
58a97671 DG	398	/* Init lttng session config */
58a97671 DG	399	ret = config_init(session_name);
f3ed775e	400	if (ret < 0) {
27089920	401	ret = CMD_ERROR;
f3ed775e DG	402	goto error;
	403	}
	404
07424f16	405
f3ed775e DG	406	ret = CMD_SUCCESS;
	407
	408	error:
a4b92340 DG	409	if (alloc_url) {
a4b92340 DG	410	free(alloc_url);
f3ed775e DG	411	}
f3ed775e DG	412
58a97671 DG	413	if (traces_path) {
58a97671 DG	414	free(traces_path);
f3ed775e	415	}
87f222b6	416	free(alloc_path);
a4b92340 DG	417
	418	if (ret < 0) {
	419	ERR("%s", lttng_strerror(ret));
	420	}
f3ed775e DG	421	return ret;
	422	}
	423
	424	/*
74cc1d0f	425	* The 'create <options>' first level command
1c8d13c8 TD	426	*
1c8d13c8 TD	427	* Returns one of the CMD_* result constants.
f3ed775e DG	428	*/
	429	int cmd_create(int argc, const char **argv)
	430	{
	431	int opt, ret = CMD_SUCCESS;
	432	static poptContext pc;
	433
	434	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	435	poptReadDefaultConfig(pc, 0);
	436
	437	while ((opt = poptGetNextOpt(pc)) != -1) {
	438	switch (opt) {
	439	case OPT_HELP:
27089920	440	usage(stdout);
f3ed775e	441	goto end;
679b4943 SM	442	case OPT_LIST_OPTIONS:
679b4943 SM	443	list_cmd_options(stdout, long_options);
679b4943	444	goto end;
f3ed775e DG	445	default:
	446	usage(stderr);
	447	ret = CMD_UNDEFINED;
	448	goto end;
	449	}
	450	}
	451
	452	opt_session_name = (char*) poptGetArg(pc);
	453
	454	ret = create_session();
	455
	456	end:
ca1c3607	457	poptFreeContext(pc);
f3ed775e DG	458	return ret;
f3ed775e DG	459	}