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 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
a4b92340 | 19 | #include <assert.h> |
ecc48a90 | 20 | #include <ctype.h> |
f3ed775e DG |
21 | #include <popt.h> |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/types.h> | |
27 | #include <time.h> | |
28 | #include <unistd.h> | |
92360082 | 29 | #include <signal.h> |
bbd44cae | 30 | #include <sys/wait.h> |
f3ed775e | 31 | |
37d03ff7 JRJ |
32 | #include <common/mi-lttng.h> |
33 | ||
c399183f | 34 | #include "../command.h" |
679b4943 | 35 | #include "../utils.h" |
f3ed775e | 36 | |
00e2e675 | 37 | #include <common/defaults.h> |
42224349 | 38 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 39 | #include <common/uri.h> |
81b86775 | 40 | #include <common/utils.h> |
16f6f820 | 41 | #include <lttng/snapshot.h> |
42224349 | 42 | |
f3ed775e DG |
43 | static char *opt_output_path; |
44 | static char *opt_session_name; | |
a4b92340 DG |
45 | static char *opt_url; |
46 | static char *opt_ctrl_url; | |
47 | static char *opt_data_url; | |
d7ba1388 | 48 | static char *opt_shm_path; |
a4b92340 | 49 | static int opt_no_consumer; |
96fe6b8d | 50 | static int opt_no_output; |
16f6f820 | 51 | static int opt_snapshot; |
ecc48a90 | 52 | static unsigned int opt_live_timer; |
f3ed775e DG |
53 | |
54 | enum { | |
55 | OPT_HELP = 1, | |
679b4943 | 56 | OPT_LIST_OPTIONS, |
ecc48a90 | 57 | OPT_LIVE_TIMER, |
f3ed775e DG |
58 | }; |
59 | ||
227bc702 JR |
60 | enum { |
61 | OUTPUT_UNKNOWN = 1, | |
62 | OUTPUT_NONE, | |
63 | OUTPUT_LOCAL, | |
64 | OUTPUT_NET, | |
65 | }; | |
66 | enum { | |
67 | SESSION_UNKNOWN = 1, | |
68 | SESSION_NORMAL, | |
69 | SESSION_LIVE, | |
70 | SESSION_SNAPSHOT, | |
71 | }; | |
72 | ||
73 | ||
37d03ff7 JRJ |
74 | static struct mi_writer *writer; |
75 | ||
f3ed775e DG |
76 | static struct poptOption long_options[] = { |
77 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
679b4943 SM |
78 | {"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL}, |
79 | {"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL}, | |
80 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, | |
23d14dff DG |
81 | {"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0}, |
82 | {"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0}, | |
83 | {"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0}, | |
96fe6b8d | 84 | {"no-output", 0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0}, |
2bba9e53 | 85 | {"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0}, |
16f6f820 | 86 | {"snapshot", 0, POPT_ARG_VAL, &opt_snapshot, 1, 0, 0}, |
d73c5802 | 87 | {"live", 0, POPT_ARG_INT | POPT_ARGFLAG_OPTIONAL, 0, OPT_LIVE_TIMER, 0, 0}, |
d7ba1388 | 88 | {"shm-path", 0, POPT_ARG_STRING, &opt_shm_path, 0, 0, 0}, |
f3ed775e DG |
89 | {0, 0, 0, 0, 0, 0, 0} |
90 | }; | |
91 | ||
16de1a24 DG |
92 | /* |
93 | * Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on | |
94 | * why this declaration exists and used ONLY in for this command. | |
95 | */ | |
07424f16 | 96 | extern int _lttng_create_session_ext(const char *name, const char *url, |
d1edd8a8 | 97 | const char *datetime); |
07424f16 | 98 | |
37d03ff7 | 99 | /* |
485ca16f | 100 | * Retrieve the created session and mi output it based on provided argument |
37d03ff7 JRJ |
101 | * This is currently a summary of what was pretty printed and is subject to |
102 | * enhancements. | |
37d03ff7 JRJ |
103 | */ |
104 | static int mi_created_session(const char *session_name) | |
105 | { | |
106 | int ret, i, count, found; | |
107 | struct lttng_session *sessions; | |
108 | ||
109 | /* session_name should not be null */ | |
110 | assert(session_name); | |
111 | assert(writer); | |
112 | ||
113 | count = lttng_list_sessions(&sessions); | |
114 | if (count < 0) { | |
115 | ret = count; | |
116 | ERR("%s", lttng_strerror(ret)); | |
117 | goto error; | |
118 | } | |
119 | ||
120 | if (count == 0) { | |
121 | ERR("Error session creation failed: session %s not found", session_name); | |
122 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
123 | goto end; | |
124 | } | |
125 | ||
126 | found = 0; | |
127 | for (i = 0; i < count; i++) { | |
128 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
129 | found = 1; | |
130 | ret = mi_lttng_session(writer, &sessions[i], 0); | |
131 | if (ret) { | |
132 | goto error; | |
133 | } | |
134 | break; | |
135 | } | |
136 | } | |
137 | ||
138 | if (!found) { | |
139 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
140 | } else { | |
141 | ret = CMD_SUCCESS; | |
142 | } | |
143 | ||
144 | error: | |
145 | free(sessions); | |
146 | end: | |
147 | return ret; | |
148 | } | |
149 | ||
00e2e675 | 150 | /* |
a4b92340 | 151 | * For a session name, set the consumer URLs. |
00e2e675 | 152 | */ |
a4b92340 DG |
153 | static int set_consumer_url(const char *session_name, const char *ctrl_url, |
154 | const char *data_url) | |
00e2e675 | 155 | { |
a4b92340 DG |
156 | int ret; |
157 | struct lttng_handle *handle; | |
a4b92340 DG |
158 | |
159 | assert(session_name); | |
160 | ||
161 | /* | |
95681498 JG |
162 | * Set handle with the session_name, but no domain. This implies that |
163 | * the actions taken with this handle apply on the tracing session | |
164 | * rather then the domain-specific session. | |
a4b92340 | 165 | */ |
95681498 | 166 | handle = lttng_create_handle(session_name, NULL); |
a4b92340 DG |
167 | if (handle == NULL) { |
168 | ret = CMD_FATAL; | |
169 | goto error; | |
170 | } | |
00e2e675 | 171 | |
a4b92340 DG |
172 | ret = lttng_set_consumer_url(handle, ctrl_url, data_url); |
173 | if (ret < 0) { | |
174 | goto error; | |
00e2e675 DG |
175 | } |
176 | ||
a4b92340 DG |
177 | error: |
178 | lttng_destroy_handle(handle); | |
179 | return ret; | |
180 | } | |
181 | ||
16f6f820 DG |
182 | static int add_snapshot_output(const char *session_name, const char *ctrl_url, |
183 | const char *data_url) | |
184 | { | |
185 | int ret; | |
186 | struct lttng_snapshot_output *output = NULL; | |
187 | ||
188 | assert(session_name); | |
189 | ||
190 | output = lttng_snapshot_output_create(); | |
191 | if (!output) { | |
192 | ret = CMD_FATAL; | |
193 | goto error_create; | |
194 | } | |
195 | ||
196 | if (ctrl_url) { | |
197 | ret = lttng_snapshot_output_set_ctrl_url(ctrl_url, output); | |
198 | if (ret < 0) { | |
199 | goto error; | |
200 | } | |
201 | } | |
202 | ||
203 | if (data_url) { | |
204 | ret = lttng_snapshot_output_set_data_url(data_url, output); | |
205 | if (ret < 0) { | |
206 | goto error; | |
207 | } | |
208 | } | |
209 | ||
210 | /* This call, if successful, populates the id of the output object. */ | |
211 | ret = lttng_snapshot_add_output(session_name, output); | |
212 | if (ret < 0) { | |
213 | goto error; | |
214 | } | |
215 | ||
216 | error: | |
217 | lttng_snapshot_output_destroy(output); | |
218 | error_create: | |
219 | return ret; | |
220 | } | |
221 | ||
227bc702 JR |
222 | /* |
223 | * Validate the combinations of passed options | |
224 | * | |
225 | * CMD_ERROR on error | |
226 | * CMD_SUCCESS on success | |
227 | */ | |
228 | static int validate_command_options(void) | |
229 | { | |
230 | int ret = CMD_SUCCESS; | |
231 | if (opt_snapshot && opt_live_timer) { | |
232 | ERR("Snapshot and live modes are mutually exclusive."); | |
233 | ret = CMD_ERROR; | |
234 | goto error; | |
235 | } | |
236 | ||
237 | if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) { | |
238 | ERR("You need both control and data URL."); | |
239 | ret = CMD_ERROR; | |
240 | goto error; | |
241 | } | |
242 | ||
243 | error: | |
244 | return ret; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Create a session via direct calls to liblttng-ctl. | |
249 | * | |
250 | * Return CMD_SUCCESS on success, negative value on internal lttng errors and positive | |
251 | * value on command errors. | |
252 | */ | |
253 | static int create_session_basic (const char *session_name, | |
254 | int session_type, | |
255 | int live_timer, | |
256 | int output_type, | |
257 | const char* url, | |
258 | const char* ctrl_url, | |
259 | const char* data_url, | |
260 | const char* shm_path, | |
261 | const char* datetime) | |
262 | { | |
263 | /* Create session based on session creation */ | |
264 | int ret = CMD_SUCCESS; | |
265 | const char *pathname; | |
266 | ||
267 | assert(datetime); | |
268 | ||
269 | if (opt_relayd_path) { | |
270 | pathname = opt_relayd_path; | |
271 | } else { | |
272 | pathname = INSTALL_BIN_PATH "/lttng-relayd"; | |
273 | } | |
274 | ||
275 | switch (session_type) { | |
276 | case SESSION_NORMAL: | |
277 | ret = _lttng_create_session_ext(session_name, url, datetime); | |
278 | break; | |
279 | case SESSION_SNAPSHOT: | |
280 | if (output_type == OUTPUT_NONE) { | |
281 | ERR("--no-output on a snapshot session is invalid"); | |
282 | ret = CMD_UNSUPPORTED; | |
283 | goto error; | |
284 | } | |
285 | ret = lttng_create_session_snapshot(session_name, url); | |
286 | break; | |
287 | case SESSION_LIVE: | |
288 | if (output_type == OUTPUT_NONE) { | |
289 | ERR("--no-output on a live session is invalid"); | |
290 | ret = CMD_UNSUPPORTED; | |
291 | goto error; | |
292 | } | |
293 | ||
294 | if (output_type == OUTPUT_LOCAL) { | |
295 | ERR("Local file output on a live session is invalid"); | |
296 | ret = CMD_UNSUPPORTED; | |
297 | goto error; | |
298 | } | |
299 | if (output_type != OUTPUT_NET && !check_relayd() && | |
300 | spawn_relayd(pathname, 0) < 0) { | |
301 | ret = CMD_FATAL; | |
302 | goto error; | |
303 | } | |
304 | ret = lttng_create_session_live(session_name, url, live_timer); | |
305 | break; | |
306 | default: | |
307 | ERR("Unknown session type"); | |
308 | ret = CMD_UNDEFINED; | |
309 | goto error; | |
310 | } | |
311 | ||
312 | if (ret < 0) { | |
313 | /* Don't set ret so lttng can interpret the sessiond error. */ | |
314 | switch (-ret) { | |
315 | case LTTNG_ERR_EXIST_SESS: | |
316 | WARN("Session %s already exists", session_name); | |
317 | break; | |
318 | default: | |
319 | break; | |
320 | } | |
321 | goto error; | |
322 | } | |
323 | ||
324 | /* Configure the session based on the output type */ | |
325 | switch (output_type) { | |
326 | case OUTPUT_LOCAL: | |
327 | break; | |
328 | case OUTPUT_NET: | |
329 | if (session_type == SESSION_SNAPSHOT) { | |
330 | ret = add_snapshot_output(session_name, ctrl_url, | |
331 | data_url); | |
332 | } else if (ctrl_url && data_url) { | |
333 | /* | |
334 | * Normal sessions and live sessions behave the same way | |
335 | * regarding consumer url. | |
336 | */ | |
337 | ret = set_consumer_url(session_name, ctrl_url, data_url); | |
338 | } | |
339 | if (ret < 0) { | |
340 | /* Destroy created session on errors */ | |
341 | lttng_destroy_session(session_name); | |
342 | goto error; | |
343 | } | |
344 | break; | |
345 | case OUTPUT_NONE: | |
346 | break; | |
347 | default: | |
348 | ERR("Unknown output type"); | |
349 | ret = CMD_UNDEFINED; | |
350 | goto error; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Set the session shared memory path | |
355 | */ | |
356 | if (shm_path) { | |
357 | ret = lttng_set_session_shm_path(session_name, shm_path); | |
358 | if (ret < 0) { | |
359 | lttng_destroy_session(session_name); | |
360 | goto error; | |
361 | } | |
362 | } | |
363 | error: | |
364 | return ret; | |
365 | } | |
366 | ||
367 | static int generate_output(const char *session_name, | |
368 | int session_type, | |
369 | int live_timer, | |
370 | int output_type, | |
371 | const char* url, | |
372 | const char* ctrl_url, | |
373 | const char* data_url, | |
374 | const char* shm_path) | |
375 | { | |
376 | int ret = CMD_SUCCESS; | |
377 | ||
378 | /* | |
379 | * TODO move this to after session name | |
380 | * for now we only emulate previous behaviour. | |
381 | */ | |
382 | if (session_type != SESSION_SNAPSHOT) { | |
383 | if (ctrl_url) { | |
384 | MSG("Control URL %s set for session %s", ctrl_url, session_name); | |
385 | } | |
386 | ||
387 | if (data_url) { | |
388 | MSG("Data URL %s set for session %s", data_url, session_name); | |
389 | } | |
390 | } | |
391 | ||
392 | if (url && output_type == OUTPUT_LOCAL) { | |
393 | /* Remove the file:// */ | |
394 | if (strlen(url) > strlen("file://")){ | |
395 | url = url + strlen("file://"); | |
396 | } | |
397 | } | |
398 | ||
399 | MSG("Session %s created.", session_name); | |
400 | if (url && session_type != SESSION_SNAPSHOT) { | |
401 | MSG("Traces will be written in %s", url); | |
402 | ||
403 | if (live_timer) { | |
404 | MSG("Live timer set to %u usec", live_timer); | |
405 | } | |
406 | } else if (session_type == SESSION_SNAPSHOT) { | |
407 | if (url) { | |
408 | MSG("Default snapshot output set to: %s", url); | |
409 | } | |
410 | MSG("Snapshot mode set. Every channel enabled for that session will " | |
411 | "be set to mmap output, and default to overwrite mode."); | |
412 | } | |
413 | ||
414 | if (shm_path) { | |
415 | MSG("Session %s set to shm_path: %s.", session_name, | |
416 | shm_path); | |
417 | } | |
418 | ||
419 | /* Mi output */ | |
420 | if (lttng_opt_mi) { | |
421 | ret = mi_created_session(session_name); | |
422 | if (ret) { | |
423 | ret = CMD_ERROR; | |
424 | goto error; | |
425 | } | |
426 | } | |
427 | error: | |
428 | return ret; | |
429 | } | |
430 | ||
f3ed775e | 431 | /* |
1c8d13c8 TD |
432 | * Create a tracing session. |
433 | * If no name is specified, a default name is generated. | |
f3ed775e | 434 | * |
1c8d13c8 | 435 | * Returns one of the CMD_* result constants. |
f3ed775e | 436 | */ |
a4b92340 | 437 | static int create_session(void) |
f3ed775e | 438 | { |
a4b92340 | 439 | int ret; |
227bc702 JR |
440 | |
441 | /* Base data */ | |
442 | int base_session_type = SESSION_UNKNOWN; | |
443 | int base_output_type = OUTPUT_UNKNOWN; | |
444 | char *base_session_name = NULL; | |
445 | char *base_url = NULL; | |
446 | char *base_ctrl_url = NULL; | |
447 | char *base_data_url = NULL; | |
448 | char *base_shm_path = NULL; | |
449 | int base_live_timer = 0; | |
450 | ||
451 | /* Time data */ | |
452 | char datetime[16]; | |
f3ed775e | 453 | time_t rawtime; |
227bc702 JR |
454 | struct tm *timeinfo = NULL; |
455 | ||
456 | /* Temporary variables */ | |
457 | char *traces_path = NULL; | |
458 | char *temp_url = NULL; | |
459 | char *session_name_date = NULL; | |
460 | char *tmp_url = NULL; | |
461 | char *tmp_home_path = NULL; | |
462 | struct lttng_uri *uris = NULL; | |
463 | ssize_t uri_array_size = 0; | |
464 | ||
465 | /* Option validation */ | |
466 | if (validate_command_options() != CMD_SUCCESS) { | |
467 | ret = CMD_ERROR; | |
468 | goto error; | |
469 | } | |
f3ed775e | 470 | |
d6175221 DG |
471 | /* Get date and time for automatic session name/path */ |
472 | time(&rawtime); | |
473 | timeinfo = localtime(&rawtime); | |
474 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
475 | ||
227bc702 JR |
476 | /* Find the session type based on options */ |
477 | if(base_session_type == SESSION_UNKNOWN) { | |
478 | if (opt_snapshot) { | |
479 | base_session_type = SESSION_SNAPSHOT; | |
480 | } else if (opt_live_timer) { | |
481 | base_session_type = SESSION_LIVE; | |
482 | } else { | |
483 | base_session_type = SESSION_NORMAL; | |
07424f16 | 484 | } |
227bc702 JR |
485 | } |
486 | ||
487 | /* | |
488 | * Session name handling | |
489 | */ | |
490 | if (opt_session_name) { | |
491 | /* Override the session name */ | |
487b253b DG |
492 | if (strlen(opt_session_name) > NAME_MAX) { |
493 | ERR("Session name too long. Length must be lower or equal to %d", | |
494 | NAME_MAX); | |
495 | ret = LTTNG_ERR_SESSION_FAIL; | |
227bc702 | 496 | free(session_name_date); |
487b253b DG |
497 | goto error; |
498 | } | |
4b861950 DG |
499 | /* |
500 | * Check if the session name begins with "auto-" or is exactly "auto". | |
501 | * Both are reserved for the default session name. See bug #449 to | |
502 | * understand why we need to check both here. | |
503 | */ | |
504 | if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-", | |
227bc702 JR |
505 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) || |
506 | (strncmp(opt_session_name, DEFAULT_SESSION_NAME, | |
507 | strlen(DEFAULT_SESSION_NAME)) == 0 && | |
508 | strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) { | |
61b35a5a DG |
509 | ERR("%s is a reserved keyword for default session(s)", |
510 | DEFAULT_SESSION_NAME); | |
227bc702 JR |
511 | |
512 | ret = CMD_ERROR; | |
513 | goto error; | |
514 | } | |
515 | ||
516 | base_session_name = strndup(opt_session_name, NAME_MAX); | |
517 | if (!base_session_name) { | |
518 | PERROR("Strdup session name"); | |
61b35a5a DG |
519 | ret = CMD_ERROR; |
520 | goto error; | |
521 | } | |
227bc702 JR |
522 | |
523 | ret = asprintf(&session_name_date, "%s-%s", base_session_name, datetime); | |
524 | if (ret < 0) { | |
525 | PERROR("Asprintf session name"); | |
526 | goto error; | |
527 | } | |
528 | DBG("Session name from command option set to %s", base_session_name); | |
529 | } else if (base_session_name) { | |
530 | ret = asprintf(&session_name_date, "%s-%s", base_session_name, datetime); | |
531 | if (ret < 0) { | |
532 | PERROR("Asprintf session name"); | |
533 | goto error; | |
534 | } | |
535 | } else { | |
536 | /* Generate a name */ | |
537 | /* TODO: use asprint */ | |
538 | ret = asprintf(&base_session_name, DEFAULT_SESSION_NAME "-%s", datetime); | |
07424f16 | 539 | if (ret < 0) { |
227bc702 | 540 | PERROR("Asprintf generated session name"); |
07424f16 DG |
541 | goto error; |
542 | } | |
227bc702 JR |
543 | session_name_date = strdup(base_session_name); |
544 | DBG("Auto session name set to %s", base_session_name); | |
f3ed775e DG |
545 | } |
546 | ||
227bc702 JR |
547 | |
548 | /* | |
549 | * Output handling | |
550 | */ | |
551 | ||
552 | /* | |
553 | * If any of those options are present clear all output related data. | |
554 | */ | |
555 | if (opt_output_path || opt_url || (opt_ctrl_url && opt_data_url) || opt_no_output) { | |
556 | /* Overwrite output */ | |
557 | free(base_url); | |
558 | free(base_ctrl_url); | |
559 | free(base_data_url); | |
560 | base_url = NULL; | |
561 | base_ctrl_url = NULL; | |
562 | base_data_url = NULL; | |
1a241656 DG |
563 | } |
564 | ||
227bc702 JR |
565 | if (opt_output_path) { |
566 | ||
81b86775 | 567 | traces_path = utils_expand_path(opt_output_path); |
227bc702 | 568 | if (!traces_path) { |
00e2e675 DG |
569 | ret = CMD_ERROR; |
570 | goto error; | |
571 | } | |
572 | ||
37d03ff7 | 573 | /* Create URL string from the local file system path */ |
227bc702 | 574 | ret = asprintf(&temp_url, "file://%s", traces_path); |
00e2e675 | 575 | if (ret < 0) { |
a4b92340 | 576 | PERROR("asprintf url path"); |
00e2e675 DG |
577 | ret = CMD_FATAL; |
578 | goto error; | |
579 | } | |
227bc702 JR |
580 | |
581 | base_url = temp_url; | |
a4b92340 | 582 | } else if (opt_url) { /* Handling URL (-U opt) */ |
227bc702 | 583 | base_url = strdup(opt_url); |
1a241656 DG |
584 | } else if (opt_data_url && opt_ctrl_url) { |
585 | /* | |
227bc702 JR |
586 | * With both control and data, we'll be setting the consumer URL |
587 | * after session creation thus use no URL. | |
1a241656 | 588 | */ |
227bc702 JR |
589 | base_ctrl_url = strdup(opt_ctrl_url); |
590 | base_data_url = strdup(opt_data_url); | |
591 | } else if (!(opt_no_output || base_output_type == OUTPUT_NONE || | |
592 | base_url || base_ctrl_url || base_data_url)) { | |
593 | /* Generate default output depending on the session type */ | |
594 | switch (base_session_type) { | |
595 | case SESSION_NORMAL: | |
596 | /* fallthrough */ | |
597 | case SESSION_SNAPSHOT: | |
598 | /* Default to a local path */ | |
599 | tmp_home_path = utils_get_home_dir(); | |
600 | if (tmp_home_path == NULL) { | |
601 | ERR("HOME path not found.\n \ | |
602 | Please specify an output path using -o, --output PATH"); | |
603 | ret = CMD_FATAL; | |
604 | goto error; | |
605 | } | |
ecc48a90 | 606 | |
227bc702 JR |
607 | ret = asprintf(&tmp_url, |
608 | "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s", | |
609 | tmp_home_path, session_name_date); | |
16f6f820 | 610 | |
227bc702 JR |
611 | if (ret < 0) { |
612 | PERROR("asprintf trace dir name"); | |
613 | ret = CMD_FATAL; | |
614 | goto error; | |
615 | } | |
8960e9cd | 616 | |
227bc702 | 617 | base_url = tmp_url ; |
42224349 | 618 | break; |
227bc702 JR |
619 | case SESSION_LIVE: |
620 | /* Default to a net output */ | |
621 | ret = asprintf(&tmp_url, "net://127.0.0.1"); | |
622 | if (ret < 0) { | |
623 | PERROR("asprintf default live URL"); | |
624 | ret = CMD_FATAL; | |
625 | goto error; | |
626 | } | |
627 | base_url = tmp_url ; | |
60e835ca | 628 | break; |
227bc702 JR |
629 | default: |
630 | ERR("Unknown session type"); | |
631 | ret = CMD_FATAL; | |
a4b92340 DG |
632 | goto error; |
633 | } | |
4f50c803 DG |
634 | } |
635 | ||
227bc702 JR |
636 | /* |
637 | * Shared memory path handling | |
638 | */ | |
d7ba1388 | 639 | if (opt_shm_path) { |
227bc702 | 640 | ret = asprintf(&base_shm_path, "%s/%s", opt_shm_path, session_name_date); |
d7ba1388 | 641 | if (ret < 0) { |
227bc702 | 642 | PERROR("asprintf shm_path"); |
d7ba1388 MD |
643 | goto error; |
644 | } | |
645 | } | |
646 | ||
227bc702 JR |
647 | /* |
648 | * Live timer handling | |
649 | */ | |
650 | if (opt_live_timer) { | |
651 | base_live_timer = opt_live_timer; | |
652 | } | |
d73c5802 | 653 | |
227bc702 JR |
654 | /* Get output type from urls */ |
655 | if (base_url) { | |
656 | /* Get lttng uris from single url */ | |
657 | uri_array_size = uri_parse_str_urls(base_url, NULL, &uris); | |
658 | if (uri_array_size < 0) { | |
659 | ret = CMD_ERROR; | |
660 | goto error; | |
d73c5802 | 661 | } |
227bc702 JR |
662 | } else if (base_ctrl_url && base_data_url) { |
663 | uri_array_size = uri_parse_str_urls(base_ctrl_url, base_data_url, &uris); | |
664 | if (uri_array_size < 0) { | |
665 | ret = CMD_ERROR; | |
666 | goto error; | |
16f6f820 | 667 | } |
227bc702 JR |
668 | } else { |
669 | /* --no-output */ | |
670 | uri_array_size = 0; | |
671 | } | |
672 | ||
673 | switch (uri_array_size) { | |
674 | case 0: | |
675 | base_output_type = OUTPUT_NONE; | |
676 | break; | |
677 | case 1: | |
678 | base_output_type = OUTPUT_LOCAL; | |
679 | break; | |
680 | case 2: | |
681 | base_output_type = OUTPUT_NET; | |
682 | break; | |
683 | default: | |
684 | ret = CMD_ERROR; | |
685 | goto error; | |
a4b92340 | 686 | } |
227bc702 JR |
687 | |
688 | ret = create_session_basic (base_session_name, | |
689 | base_session_type, | |
690 | base_live_timer, | |
691 | base_output_type, | |
692 | base_url, | |
693 | base_ctrl_url, | |
694 | base_data_url, | |
695 | base_shm_path, | |
696 | datetime); | |
697 | if (ret) { | |
698 | goto error; | |
d7ba1388 | 699 | } |
a4b92340 | 700 | |
227bc702 JR |
701 | ret = generate_output (base_session_name, |
702 | base_session_type, | |
703 | base_live_timer, | |
704 | base_output_type, | |
705 | base_url, | |
706 | base_ctrl_url, | |
707 | base_data_url, | |
708 | base_shm_path); | |
709 | if (ret) { | |
710 | goto error; | |
37d03ff7 JRJ |
711 | } |
712 | ||
58a97671 | 713 | /* Init lttng session config */ |
227bc702 | 714 | ret = config_init(base_session_name); |
f3ed775e | 715 | if (ret < 0) { |
27089920 | 716 | ret = CMD_ERROR; |
f3ed775e DG |
717 | goto error; |
718 | } | |
719 | ||
f3ed775e DG |
720 | ret = CMD_SUCCESS; |
721 | ||
722 | error: | |
227bc702 JR |
723 | |
724 | /* Session temp stuff */ | |
725 | free(session_name_date); | |
726 | ||
727 | free(uris); | |
a4b92340 DG |
728 | |
729 | if (ret < 0) { | |
730 | ERR("%s", lttng_strerror(ret)); | |
731 | } | |
227bc702 JR |
732 | free(base_session_name); |
733 | free(base_url); | |
734 | free(base_ctrl_url); | |
735 | free(base_data_url); | |
736 | free(base_shm_path); | |
f3ed775e DG |
737 | return ret; |
738 | } | |
739 | ||
92360082 JG |
740 | /* |
741 | * spawn_sessiond | |
742 | * | |
743 | * Spawn a session daemon by forking and execv. | |
744 | */ | |
745 | static int spawn_sessiond(char *pathname) | |
746 | { | |
747 | int ret = 0; | |
748 | pid_t pid; | |
749 | ||
750 | MSG("Spawning a session daemon"); | |
92360082 JG |
751 | pid = fork(); |
752 | if (pid == 0) { | |
753 | /* | |
bbd44cae | 754 | * Spawn session daemon in daemon mode. |
92360082 | 755 | */ |
bbd44cae PP |
756 | execlp(pathname, "lttng-sessiond", |
757 | "--daemonize", NULL); | |
92360082 JG |
758 | /* execlp only returns if error happened */ |
759 | if (errno == ENOENT) { | |
760 | ERR("No session daemon found. Use --sessiond-path."); | |
761 | } else { | |
762 | PERROR("execlp"); | |
763 | } | |
764 | kill(getppid(), SIGTERM); /* wake parent */ | |
765 | exit(EXIT_FAILURE); | |
766 | } else if (pid > 0) { | |
92360082 | 767 | /* |
bbd44cae PP |
768 | * In daemon mode (--daemonize), sessiond only exits when |
769 | * it's ready to accept commands. | |
92360082 | 770 | */ |
bbd44cae | 771 | for (;;) { |
81527d36 JG |
772 | int status; |
773 | pid_t wait_pid_ret = waitpid(pid, &status, 0); | |
774 | ||
775 | if (wait_pid_ret < 0) { | |
776 | if (errno == EINTR) { | |
777 | continue; | |
778 | } | |
779 | PERROR("waitpid"); | |
780 | ret = -errno; | |
781 | goto end; | |
782 | } | |
bbd44cae PP |
783 | |
784 | if (WIFSIGNALED(status)) { | |
785 | ERR("Session daemon was killed by signal %d", | |
786 | WTERMSIG(status)); | |
787 | ret = -1; | |
788 | goto end; | |
789 | } else if (WIFEXITED(status)) { | |
790 | DBG("Session daemon terminated normally (exit status: %d)", | |
791 | WEXITSTATUS(status)); | |
792 | ||
793 | if (WEXITSTATUS(status) != 0) { | |
794 | ERR("Session daemon terminated with an error (exit status: %d)", | |
795 | WEXITSTATUS(status)); | |
796 | ret = -1; | |
797 | goto end; | |
798 | } | |
799 | break; | |
800 | } | |
92360082 | 801 | } |
bbd44cae | 802 | |
92360082 JG |
803 | goto end; |
804 | } else { | |
805 | PERROR("fork"); | |
806 | ret = -1; | |
807 | goto end; | |
808 | } | |
809 | ||
810 | end: | |
811 | return ret; | |
812 | } | |
813 | ||
814 | /* | |
815 | * launch_sessiond | |
816 | * | |
817 | * Check if the session daemon is available using | |
818 | * the liblttngctl API for the check. If not, try to | |
819 | * spawn a daemon. | |
820 | */ | |
821 | static int launch_sessiond(void) | |
822 | { | |
823 | int ret; | |
824 | char *pathname = NULL; | |
825 | ||
826 | ret = lttng_session_daemon_alive(); | |
827 | if (ret) { | |
828 | /* Sessiond is alive, not an error */ | |
829 | ret = 0; | |
830 | goto end; | |
831 | } | |
832 | ||
833 | /* Try command line option path */ | |
834 | pathname = opt_sessiond_path; | |
835 | ||
836 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
837 | if (pathname == NULL) { | |
838 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); | |
839 | } | |
840 | ||
841 | /* Try with configured path */ | |
842 | if (pathname == NULL) { | |
843 | if (CONFIG_SESSIOND_BIN[0] != '\0') { | |
844 | pathname = CONFIG_SESSIOND_BIN; | |
845 | } | |
846 | } | |
847 | ||
848 | /* Try the default path */ | |
849 | if (pathname == NULL) { | |
850 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
851 | } | |
852 | ||
853 | DBG("Session daemon binary path: %s", pathname); | |
854 | ||
855 | /* Check existence and permissions */ | |
856 | ret = access(pathname, F_OK | X_OK); | |
857 | if (ret < 0) { | |
858 | ERR("No such file or access denied: %s", pathname); | |
859 | goto end; | |
860 | } | |
861 | ||
862 | ret = spawn_sessiond(pathname); | |
92360082 | 863 | end: |
0f4fa0d2 JG |
864 | if (ret) { |
865 | ERR("Problem occurred while launching session daemon (%s)", | |
866 | pathname); | |
867 | } | |
92360082 JG |
868 | return ret; |
869 | } | |
870 | ||
f3ed775e | 871 | /* |
74cc1d0f | 872 | * The 'create <options>' first level command |
1c8d13c8 TD |
873 | * |
874 | * Returns one of the CMD_* result constants. | |
f3ed775e DG |
875 | */ |
876 | int cmd_create(int argc, const char **argv) | |
877 | { | |
37d03ff7 | 878 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
ecc48a90 | 879 | char *opt_arg = NULL; |
f3ed775e DG |
880 | static poptContext pc; |
881 | ||
882 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
883 | poptReadDefaultConfig(pc, 0); | |
884 | ||
885 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
886 | switch (opt) { | |
887 | case OPT_HELP: | |
4ba92f18 | 888 | SHOW_HELP(); |
f3ed775e | 889 | goto end; |
679b4943 SM |
890 | case OPT_LIST_OPTIONS: |
891 | list_cmd_options(stdout, long_options); | |
679b4943 | 892 | goto end; |
ecc48a90 JD |
893 | case OPT_LIVE_TIMER: |
894 | { | |
895 | unsigned long v; | |
896 | ||
897 | errno = 0; | |
898 | opt_arg = poptGetOptArg(pc); | |
d73c5802 DG |
899 | if (!opt_arg) { |
900 | /* Set up default values. */ | |
901 | opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER; | |
902 | DBG("Session live timer interval set to default value %d", | |
903 | opt_live_timer); | |
904 | break; | |
905 | } | |
906 | ||
ecc48a90 JD |
907 | v = strtoul(opt_arg, NULL, 0); |
908 | if (errno != 0 || !isdigit(opt_arg[0])) { | |
909 | ERR("Wrong value in --live parameter: %s", opt_arg); | |
910 | ret = CMD_ERROR; | |
911 | goto end; | |
912 | } | |
913 | if (v != (uint32_t) v) { | |
914 | ERR("32-bit overflow in --live parameter: %s", opt_arg); | |
915 | ret = CMD_ERROR; | |
916 | goto end; | |
917 | } | |
0ed9e0be JG |
918 | if (v == 0) { |
919 | ERR("Live timer interval must be greater than zero"); | |
920 | ret = CMD_ERROR; | |
921 | goto end; | |
922 | } | |
ecc48a90 JD |
923 | opt_live_timer = (uint32_t) v; |
924 | DBG("Session live timer interval set to %d", opt_live_timer); | |
925 | break; | |
926 | } | |
f3ed775e | 927 | default: |
f3ed775e DG |
928 | ret = CMD_UNDEFINED; |
929 | goto end; | |
930 | } | |
931 | } | |
932 | ||
785d2d0d | 933 | if (opt_no_consumer) { |
96fe6b8d | 934 | MSG("The option --no-consumer is obsolete. Use --no-output now."); |
785d2d0d DG |
935 | ret = CMD_WARNING; |
936 | goto end; | |
937 | } | |
938 | ||
92360082 JG |
939 | /* Spawn a session daemon if needed */ |
940 | if (!opt_no_sessiond) { | |
941 | ret = launch_sessiond(); | |
942 | if (ret) { | |
943 | ret = CMD_ERROR; | |
944 | goto end; | |
945 | } | |
946 | } | |
947 | ||
acc09215 | 948 | /* MI initialization */ |
37d03ff7 JRJ |
949 | if (lttng_opt_mi) { |
950 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
951 | if (!writer) { | |
952 | ret = -LTTNG_ERR_NOMEM; | |
953 | goto end; | |
954 | } | |
955 | ||
956 | /* Open command element */ | |
957 | ret = mi_lttng_writer_command_open(writer, | |
958 | mi_lttng_element_command_create); | |
959 | if (ret) { | |
960 | ret = CMD_ERROR; | |
961 | goto end; | |
962 | } | |
963 | ||
964 | /* Open output element */ | |
965 | ret = mi_lttng_writer_open_element(writer, | |
966 | mi_lttng_element_command_output); | |
967 | if (ret) { | |
968 | ret = CMD_ERROR; | |
969 | goto end; | |
970 | } | |
971 | } | |
f3ed775e DG |
972 | opt_session_name = (char*) poptGetArg(pc); |
973 | ||
37d03ff7 | 974 | command_ret = create_session(); |
227bc702 | 975 | |
37d03ff7 JRJ |
976 | if (command_ret) { |
977 | success = 0; | |
978 | } | |
979 | ||
980 | if (lttng_opt_mi) { | |
981 | /* Close output element */ | |
982 | ret = mi_lttng_writer_close_element(writer); | |
983 | if (ret) { | |
984 | ret = CMD_ERROR; | |
985 | goto end; | |
986 | } | |
987 | ||
988 | /* Success ? */ | |
989 | ret = mi_lttng_writer_write_element_bool(writer, | |
990 | mi_lttng_element_command_success, success); | |
991 | if (ret) { | |
992 | ret = CMD_ERROR; | |
993 | goto end; | |
994 | } | |
995 | ||
996 | /* Command element close */ | |
997 | ret = mi_lttng_writer_command_close(writer); | |
998 | if (ret) { | |
999 | ret = CMD_ERROR; | |
1000 | goto end; | |
1001 | } | |
1002 | } | |
f3ed775e DG |
1003 | |
1004 | end: | |
37d03ff7 JRJ |
1005 | /* Mi clean-up */ |
1006 | if (writer && mi_lttng_writer_destroy(writer)) { | |
1007 | /* Preserve original error code */ | |
1008 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
1009 | } | |
1010 | ||
acc09215 | 1011 | /* Overwrite ret if an error occurred in create_session() */ |
37d03ff7 JRJ |
1012 | ret = command_ret ? command_ret : ret; |
1013 | ||
ca1c3607 | 1014 | poptFreeContext(pc); |
f3ed775e DG |
1015 | return ret; |
1016 | } |