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 | ||
37d03ff7 JRJ |
60 | static struct mi_writer *writer; |
61 | ||
f3ed775e DG |
62 | static struct poptOption long_options[] = { |
63 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
679b4943 SM |
64 | {"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL}, |
65 | {"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL}, | |
66 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, | |
23d14dff DG |
67 | {"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0}, |
68 | {"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0}, | |
69 | {"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0}, | |
96fe6b8d | 70 | {"no-output", 0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0}, |
2bba9e53 | 71 | {"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0}, |
16f6f820 | 72 | {"snapshot", 0, POPT_ARG_VAL, &opt_snapshot, 1, 0, 0}, |
d73c5802 | 73 | {"live", 0, POPT_ARG_INT | POPT_ARGFLAG_OPTIONAL, 0, OPT_LIVE_TIMER, 0, 0}, |
d7ba1388 | 74 | {"shm-path", 0, POPT_ARG_STRING, &opt_shm_path, 0, 0, 0}, |
f3ed775e DG |
75 | {0, 0, 0, 0, 0, 0, 0} |
76 | }; | |
77 | ||
16de1a24 DG |
78 | /* |
79 | * Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on | |
80 | * why this declaration exists and used ONLY in for this command. | |
81 | */ | |
07424f16 | 82 | extern int _lttng_create_session_ext(const char *name, const char *url, |
d1edd8a8 | 83 | const char *datetime); |
07424f16 | 84 | |
37d03ff7 | 85 | /* |
485ca16f | 86 | * Retrieve the created session and mi output it based on provided argument |
37d03ff7 JRJ |
87 | * This is currently a summary of what was pretty printed and is subject to |
88 | * enhancements. | |
37d03ff7 JRJ |
89 | */ |
90 | static int mi_created_session(const char *session_name) | |
91 | { | |
92 | int ret, i, count, found; | |
93 | struct lttng_session *sessions; | |
94 | ||
95 | /* session_name should not be null */ | |
96 | assert(session_name); | |
97 | assert(writer); | |
98 | ||
99 | count = lttng_list_sessions(&sessions); | |
100 | if (count < 0) { | |
101 | ret = count; | |
102 | ERR("%s", lttng_strerror(ret)); | |
103 | goto error; | |
104 | } | |
105 | ||
106 | if (count == 0) { | |
107 | ERR("Error session creation failed: session %s not found", session_name); | |
108 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
109 | goto end; | |
110 | } | |
111 | ||
112 | found = 0; | |
113 | for (i = 0; i < count; i++) { | |
114 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
115 | found = 1; | |
116 | ret = mi_lttng_session(writer, &sessions[i], 0); | |
117 | if (ret) { | |
118 | goto error; | |
119 | } | |
120 | break; | |
121 | } | |
122 | } | |
123 | ||
124 | if (!found) { | |
125 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
126 | } else { | |
127 | ret = CMD_SUCCESS; | |
128 | } | |
129 | ||
130 | error: | |
131 | free(sessions); | |
132 | end: | |
133 | return ret; | |
134 | } | |
135 | ||
00e2e675 | 136 | /* |
a4b92340 | 137 | * For a session name, set the consumer URLs. |
00e2e675 | 138 | */ |
a4b92340 DG |
139 | static int set_consumer_url(const char *session_name, const char *ctrl_url, |
140 | const char *data_url) | |
00e2e675 | 141 | { |
a4b92340 DG |
142 | int ret; |
143 | struct lttng_handle *handle; | |
144 | struct lttng_domain dom; | |
145 | ||
146 | assert(session_name); | |
147 | ||
148 | /* | |
149 | * Set handle with the session name and the domain set to 0. This means to | |
150 | * the session daemon that the next action applies on the tracing session | |
151 | * rather then the domain specific session. | |
152 | */ | |
153 | memset(&dom, 0, sizeof(dom)); | |
154 | ||
155 | handle = lttng_create_handle(session_name, &dom); | |
156 | if (handle == NULL) { | |
157 | ret = CMD_FATAL; | |
158 | goto error; | |
159 | } | |
00e2e675 | 160 | |
a4b92340 DG |
161 | ret = lttng_set_consumer_url(handle, ctrl_url, data_url); |
162 | if (ret < 0) { | |
163 | goto error; | |
00e2e675 DG |
164 | } |
165 | ||
a4b92340 DG |
166 | if (ctrl_url) { |
167 | MSG("Control URL %s set for session %s", ctrl_url, session_name); | |
00e2e675 DG |
168 | } |
169 | ||
a4b92340 DG |
170 | if (data_url) { |
171 | MSG("Data URL %s set for session %s", data_url, session_name); | |
172 | } | |
173 | ||
174 | error: | |
175 | lttng_destroy_handle(handle); | |
176 | return ret; | |
177 | } | |
178 | ||
16f6f820 DG |
179 | static int add_snapshot_output(const char *session_name, const char *ctrl_url, |
180 | const char *data_url) | |
181 | { | |
182 | int ret; | |
183 | struct lttng_snapshot_output *output = NULL; | |
184 | ||
185 | assert(session_name); | |
186 | ||
187 | output = lttng_snapshot_output_create(); | |
188 | if (!output) { | |
189 | ret = CMD_FATAL; | |
190 | goto error_create; | |
191 | } | |
192 | ||
193 | if (ctrl_url) { | |
194 | ret = lttng_snapshot_output_set_ctrl_url(ctrl_url, output); | |
195 | if (ret < 0) { | |
196 | goto error; | |
197 | } | |
198 | } | |
199 | ||
200 | if (data_url) { | |
201 | ret = lttng_snapshot_output_set_data_url(data_url, output); | |
202 | if (ret < 0) { | |
203 | goto error; | |
204 | } | |
205 | } | |
206 | ||
207 | /* This call, if successful, populates the id of the output object. */ | |
208 | ret = lttng_snapshot_add_output(session_name, output); | |
209 | if (ret < 0) { | |
210 | goto error; | |
211 | } | |
212 | ||
213 | error: | |
214 | lttng_snapshot_output_destroy(output); | |
215 | error_create: | |
216 | return ret; | |
217 | } | |
218 | ||
f3ed775e | 219 | /* |
1c8d13c8 TD |
220 | * Create a tracing session. |
221 | * If no name is specified, a default name is generated. | |
f3ed775e | 222 | * |
1c8d13c8 | 223 | * Returns one of the CMD_* result constants. |
f3ed775e | 224 | */ |
a4b92340 | 225 | static int create_session(void) |
f3ed775e | 226 | { |
a4b92340 | 227 | int ret; |
07424f16 | 228 | char *session_name = NULL, *traces_path = NULL, *alloc_path = NULL; |
a4b92340 | 229 | char *alloc_url = NULL, *url = NULL, datetime[16]; |
487b253b | 230 | char session_name_date[NAME_MAX + 17], *print_str_url = NULL; |
f3ed775e DG |
231 | time_t rawtime; |
232 | struct tm *timeinfo; | |
d7ba1388 | 233 | char shm_path[PATH_MAX] = ""; |
f3ed775e | 234 | |
d6175221 DG |
235 | /* Get date and time for automatic session name/path */ |
236 | time(&rawtime); | |
237 | timeinfo = localtime(&rawtime); | |
238 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
239 | ||
f3ed775e DG |
240 | /* Auto session name creation */ |
241 | if (opt_session_name == NULL) { | |
07424f16 DG |
242 | ret = snprintf(session_name_date, sizeof(session_name_date), |
243 | DEFAULT_SESSION_NAME "-%s", datetime); | |
d6175221 | 244 | if (ret < 0) { |
07424f16 DG |
245 | PERROR("snprintf session name"); |
246 | goto error; | |
247 | } | |
04965770 | 248 | session_name = session_name_date; |
07424f16 | 249 | DBG("Auto session name set to %s", session_name_date); |
f3ed775e | 250 | } else { |
487b253b DG |
251 | if (strlen(opt_session_name) > NAME_MAX) { |
252 | ERR("Session name too long. Length must be lower or equal to %d", | |
253 | NAME_MAX); | |
254 | ret = LTTNG_ERR_SESSION_FAIL; | |
255 | goto error; | |
256 | } | |
4b861950 DG |
257 | /* |
258 | * Check if the session name begins with "auto-" or is exactly "auto". | |
259 | * Both are reserved for the default session name. See bug #449 to | |
260 | * understand why we need to check both here. | |
261 | */ | |
262 | if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-", | |
263 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) || | |
264 | (strncmp(opt_session_name, DEFAULT_SESSION_NAME, | |
61b35a5a | 265 | strlen(DEFAULT_SESSION_NAME)) == 0 && |
4b861950 | 266 | strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) { |
61b35a5a DG |
267 | ERR("%s is a reserved keyword for default session(s)", |
268 | DEFAULT_SESSION_NAME); | |
269 | ret = CMD_ERROR; | |
270 | goto error; | |
271 | } | |
f3ed775e | 272 | session_name = opt_session_name; |
07424f16 DG |
273 | ret = snprintf(session_name_date, sizeof(session_name_date), |
274 | "%s-%s", session_name, datetime); | |
275 | if (ret < 0) { | |
276 | PERROR("snprintf session name"); | |
277 | goto error; | |
278 | } | |
f3ed775e DG |
279 | } |
280 | ||
1a241656 DG |
281 | if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) { |
282 | ERR("You need both control and data URL."); | |
283 | ret = CMD_ERROR; | |
284 | goto error; | |
285 | } | |
286 | ||
785d2d0d | 287 | if (opt_output_path != NULL) { |
81b86775 | 288 | traces_path = utils_expand_path(opt_output_path); |
00e2e675 DG |
289 | if (traces_path == NULL) { |
290 | ret = CMD_ERROR; | |
291 | goto error; | |
292 | } | |
293 | ||
37d03ff7 | 294 | /* Create URL string from the local file system path */ |
a4b92340 | 295 | ret = asprintf(&alloc_url, "file://%s", traces_path); |
00e2e675 | 296 | if (ret < 0) { |
a4b92340 | 297 | PERROR("asprintf url path"); |
00e2e675 DG |
298 | ret = CMD_FATAL; |
299 | goto error; | |
300 | } | |
a4b92340 DG |
301 | /* URL to use in the lttng_create_session() call */ |
302 | url = alloc_url; | |
40b03f52 | 303 | print_str_url = traces_path; |
a4b92340 DG |
304 | } else if (opt_url) { /* Handling URL (-U opt) */ |
305 | url = opt_url; | |
40b03f52 | 306 | print_str_url = url; |
1a241656 DG |
307 | } else if (opt_data_url && opt_ctrl_url) { |
308 | /* | |
309 | * With both control and data, we'll be setting the consumer URL after | |
310 | * session creation thus use no URL. | |
311 | */ | |
312 | url = NULL; | |
2bba9e53 | 313 | } else if (!opt_no_output) { |
ab2e5c7c MD |
314 | char *tmp_path; |
315 | ||
00e2e675 | 316 | /* Auto output path */ |
ab2e5c7c MD |
317 | tmp_path = utils_get_home_dir(); |
318 | if (tmp_path == NULL) { | |
d386b234 | 319 | ERR("HOME path not found.\n \ |
00e2e675 | 320 | Please specify an output path using -o, --output PATH"); |
f3ed775e DG |
321 | ret = CMD_FATAL; |
322 | goto error; | |
323 | } | |
ab2e5c7c MD |
324 | alloc_path = strdup(tmp_path); |
325 | if (!alloc_path) { | |
326 | PERROR("allocating alloc_path"); | |
327 | ret = CMD_FATAL; | |
328 | goto error; | |
329 | } | |
07424f16 DG |
330 | ret = asprintf(&alloc_url, |
331 | "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s", | |
332 | alloc_path, session_name_date); | |
58a97671 | 333 | if (ret < 0) { |
00e2e675 DG |
334 | PERROR("asprintf trace dir name"); |
335 | ret = CMD_FATAL; | |
58a97671 DG |
336 | goto error; |
337 | } | |
00e2e675 | 338 | |
a4b92340 | 339 | url = alloc_url; |
1a241656 | 340 | print_str_url = alloc_url + strlen("file://"); |
2bba9e53 | 341 | } else { |
96fe6b8d | 342 | /* No output means --no-output or --snapshot mode. */ |
2bba9e53 | 343 | url = NULL; |
00e2e675 DG |
344 | } |
345 | ||
1a241656 | 346 | /* Use default live URL if NO url is/are found. */ |
ecc48a90 | 347 | if ((opt_live_timer && !opt_url) && (opt_live_timer && !opt_data_url)) { |
d73c5802 DG |
348 | ret = asprintf(&alloc_url, "net://127.0.0.1"); |
349 | if (ret < 0) { | |
350 | PERROR("asprintf default live URL"); | |
351 | ret = CMD_FATAL; | |
352 | goto error; | |
353 | } | |
354 | url = alloc_url; | |
355 | print_str_url = url; | |
ecc48a90 JD |
356 | } |
357 | ||
358 | if (opt_snapshot && opt_live_timer) { | |
359 | ERR("Snapshot and live modes are mutually exclusive."); | |
360 | ret = CMD_ERROR; | |
361 | goto error; | |
362 | } | |
363 | ||
16f6f820 DG |
364 | if (opt_snapshot) { |
365 | /* No output by default. */ | |
366 | const char *snapshot_url = NULL; | |
367 | ||
368 | if (opt_url) { | |
369 | snapshot_url = url; | |
370 | } else if (!opt_data_url && !opt_ctrl_url) { | |
371 | /* This is the session path that we need to use as output. */ | |
372 | snapshot_url = url; | |
373 | } | |
374 | ret = lttng_create_session_snapshot(session_name, snapshot_url); | |
ecc48a90 | 375 | } else if (opt_live_timer) { |
8960e9cd DG |
376 | const char *pathname; |
377 | ||
378 | if (opt_relayd_path) { | |
379 | pathname = opt_relayd_path; | |
380 | } else { | |
381 | pathname = INSTALL_BIN_PATH "/lttng-relayd"; | |
382 | } | |
2c521c63 DG |
383 | if (!opt_url && !opt_data_url && !check_relayd() && |
384 | spawn_relayd(pathname, 0) < 0) { | |
8960e9cd DG |
385 | goto error; |
386 | } | |
ecc48a90 | 387 | ret = lttng_create_session_live(session_name, url, opt_live_timer); |
16f6f820 | 388 | } else { |
d1edd8a8 | 389 | ret = _lttng_create_session_ext(session_name, url, datetime); |
16f6f820 | 390 | } |
f3ed775e | 391 | if (ret < 0) { |
ae856491 | 392 | /* Don't set ret so lttng can interpret the sessiond error. */ |
42224349 | 393 | switch (-ret) { |
f73fabfd | 394 | case LTTNG_ERR_EXIST_SESS: |
42224349 DG |
395 | WARN("Session %s already exists", session_name); |
396 | break; | |
60e835ca | 397 | default: |
60e835ca | 398 | break; |
42224349 | 399 | } |
f3ed775e DG |
400 | goto error; |
401 | } | |
402 | ||
0ab61906 | 403 | if (opt_ctrl_url && opt_data_url) { |
16f6f820 DG |
404 | if (opt_snapshot) { |
405 | ret = add_snapshot_output(session_name, opt_ctrl_url, | |
406 | opt_data_url); | |
407 | } else { | |
408 | /* Setting up control URI (-C or/and -D opt) */ | |
409 | ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url); | |
410 | } | |
a4b92340 | 411 | if (ret < 0) { |
4f50c803 DG |
412 | /* Destroy created session because the URL are not valid. */ |
413 | lttng_destroy_session(session_name); | |
a4b92340 DG |
414 | goto error; |
415 | } | |
4f50c803 DG |
416 | } |
417 | ||
d7ba1388 MD |
418 | if (opt_shm_path) { |
419 | ret = snprintf(shm_path, sizeof(shm_path), | |
420 | "%s/%s", opt_shm_path, session_name_date); | |
421 | if (ret < 0) { | |
422 | PERROR("snprintf shm_path"); | |
423 | goto error; | |
424 | } | |
425 | ||
426 | ret = lttng_set_session_shm_path(session_name, shm_path); | |
427 | if (ret < 0) { | |
428 | lttng_destroy_session(session_name); | |
429 | goto error; | |
430 | } | |
431 | } | |
432 | ||
4f50c803 | 433 | MSG("Session %s created.", session_name); |
16f6f820 | 434 | if (print_str_url && !opt_snapshot) { |
4f50c803 | 435 | MSG("Traces will be written in %s", print_str_url); |
d73c5802 DG |
436 | |
437 | if (opt_live_timer) { | |
438 | MSG("Live timer set to %u usec", opt_live_timer); | |
439 | } | |
16f6f820 DG |
440 | } else if (opt_snapshot) { |
441 | if (print_str_url) { | |
442 | MSG("Default snapshot output set to: %s", print_str_url); | |
443 | } | |
444 | MSG("Snapshot mode set. Every channel enabled for that session will " | |
1daafe0d | 445 | "be set in overwrite mode and mmap output."); |
a4b92340 | 446 | } |
d7ba1388 MD |
447 | if (opt_shm_path) { |
448 | MSG("Session %s set to shm_path: %s.", session_name, | |
449 | shm_path); | |
450 | } | |
a4b92340 | 451 | |
37d03ff7 JRJ |
452 | /* Mi output */ |
453 | if (lttng_opt_mi) { | |
454 | ret = mi_created_session(session_name); | |
455 | if (ret) { | |
456 | ret = CMD_ERROR; | |
457 | goto error; | |
458 | } | |
459 | } | |
460 | ||
58a97671 DG |
461 | /* Init lttng session config */ |
462 | ret = config_init(session_name); | |
f3ed775e | 463 | if (ret < 0) { |
27089920 | 464 | ret = CMD_ERROR; |
f3ed775e DG |
465 | goto error; |
466 | } | |
467 | ||
f3ed775e DG |
468 | ret = CMD_SUCCESS; |
469 | ||
470 | error: | |
0e428499 DG |
471 | free(alloc_url); |
472 | free(traces_path); | |
87f222b6 | 473 | free(alloc_path); |
a4b92340 DG |
474 | |
475 | if (ret < 0) { | |
476 | ERR("%s", lttng_strerror(ret)); | |
477 | } | |
f3ed775e DG |
478 | return ret; |
479 | } | |
480 | ||
92360082 JG |
481 | /* |
482 | * spawn_sessiond | |
483 | * | |
484 | * Spawn a session daemon by forking and execv. | |
485 | */ | |
486 | static int spawn_sessiond(char *pathname) | |
487 | { | |
488 | int ret = 0; | |
489 | pid_t pid; | |
490 | ||
491 | MSG("Spawning a session daemon"); | |
92360082 JG |
492 | pid = fork(); |
493 | if (pid == 0) { | |
494 | /* | |
bbd44cae | 495 | * Spawn session daemon in daemon mode. |
92360082 | 496 | */ |
bbd44cae PP |
497 | execlp(pathname, "lttng-sessiond", |
498 | "--daemonize", NULL); | |
92360082 JG |
499 | /* execlp only returns if error happened */ |
500 | if (errno == ENOENT) { | |
501 | ERR("No session daemon found. Use --sessiond-path."); | |
502 | } else { | |
503 | PERROR("execlp"); | |
504 | } | |
505 | kill(getppid(), SIGTERM); /* wake parent */ | |
506 | exit(EXIT_FAILURE); | |
507 | } else if (pid > 0) { | |
92360082 | 508 | /* |
bbd44cae PP |
509 | * In daemon mode (--daemonize), sessiond only exits when |
510 | * it's ready to accept commands. | |
92360082 | 511 | */ |
bbd44cae | 512 | for (;;) { |
81527d36 JG |
513 | int status; |
514 | pid_t wait_pid_ret = waitpid(pid, &status, 0); | |
515 | ||
516 | if (wait_pid_ret < 0) { | |
517 | if (errno == EINTR) { | |
518 | continue; | |
519 | } | |
520 | PERROR("waitpid"); | |
521 | ret = -errno; | |
522 | goto end; | |
523 | } | |
bbd44cae PP |
524 | |
525 | if (WIFSIGNALED(status)) { | |
526 | ERR("Session daemon was killed by signal %d", | |
527 | WTERMSIG(status)); | |
528 | ret = -1; | |
529 | goto end; | |
530 | } else if (WIFEXITED(status)) { | |
531 | DBG("Session daemon terminated normally (exit status: %d)", | |
532 | WEXITSTATUS(status)); | |
533 | ||
534 | if (WEXITSTATUS(status) != 0) { | |
535 | ERR("Session daemon terminated with an error (exit status: %d)", | |
536 | WEXITSTATUS(status)); | |
537 | ret = -1; | |
538 | goto end; | |
539 | } | |
540 | break; | |
541 | } | |
92360082 | 542 | } |
bbd44cae | 543 | |
92360082 JG |
544 | goto end; |
545 | } else { | |
546 | PERROR("fork"); | |
547 | ret = -1; | |
548 | goto end; | |
549 | } | |
550 | ||
551 | end: | |
552 | return ret; | |
553 | } | |
554 | ||
555 | /* | |
556 | * launch_sessiond | |
557 | * | |
558 | * Check if the session daemon is available using | |
559 | * the liblttngctl API for the check. If not, try to | |
560 | * spawn a daemon. | |
561 | */ | |
562 | static int launch_sessiond(void) | |
563 | { | |
564 | int ret; | |
565 | char *pathname = NULL; | |
566 | ||
567 | ret = lttng_session_daemon_alive(); | |
568 | if (ret) { | |
569 | /* Sessiond is alive, not an error */ | |
570 | ret = 0; | |
571 | goto end; | |
572 | } | |
573 | ||
574 | /* Try command line option path */ | |
575 | pathname = opt_sessiond_path; | |
576 | ||
577 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
578 | if (pathname == NULL) { | |
579 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); | |
580 | } | |
581 | ||
582 | /* Try with configured path */ | |
583 | if (pathname == NULL) { | |
584 | if (CONFIG_SESSIOND_BIN[0] != '\0') { | |
585 | pathname = CONFIG_SESSIOND_BIN; | |
586 | } | |
587 | } | |
588 | ||
589 | /* Try the default path */ | |
590 | if (pathname == NULL) { | |
591 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
592 | } | |
593 | ||
594 | DBG("Session daemon binary path: %s", pathname); | |
595 | ||
596 | /* Check existence and permissions */ | |
597 | ret = access(pathname, F_OK | X_OK); | |
598 | if (ret < 0) { | |
599 | ERR("No such file or access denied: %s", pathname); | |
600 | goto end; | |
601 | } | |
602 | ||
603 | ret = spawn_sessiond(pathname); | |
92360082 | 604 | end: |
0f4fa0d2 JG |
605 | if (ret) { |
606 | ERR("Problem occurred while launching session daemon (%s)", | |
607 | pathname); | |
608 | } | |
92360082 JG |
609 | return ret; |
610 | } | |
611 | ||
f3ed775e | 612 | /* |
74cc1d0f | 613 | * The 'create <options>' first level command |
1c8d13c8 TD |
614 | * |
615 | * Returns one of the CMD_* result constants. | |
f3ed775e DG |
616 | */ |
617 | int cmd_create(int argc, const char **argv) | |
618 | { | |
37d03ff7 | 619 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
ecc48a90 | 620 | char *opt_arg = NULL; |
f3ed775e DG |
621 | static poptContext pc; |
622 | ||
623 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
624 | poptReadDefaultConfig(pc, 0); | |
625 | ||
626 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
627 | switch (opt) { | |
628 | case OPT_HELP: | |
4ba92f18 | 629 | SHOW_HELP(); |
f3ed775e | 630 | goto end; |
679b4943 SM |
631 | case OPT_LIST_OPTIONS: |
632 | list_cmd_options(stdout, long_options); | |
679b4943 | 633 | goto end; |
ecc48a90 JD |
634 | case OPT_LIVE_TIMER: |
635 | { | |
636 | unsigned long v; | |
637 | ||
638 | errno = 0; | |
639 | opt_arg = poptGetOptArg(pc); | |
d73c5802 DG |
640 | if (!opt_arg) { |
641 | /* Set up default values. */ | |
642 | opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER; | |
643 | DBG("Session live timer interval set to default value %d", | |
644 | opt_live_timer); | |
645 | break; | |
646 | } | |
647 | ||
ecc48a90 JD |
648 | v = strtoul(opt_arg, NULL, 0); |
649 | if (errno != 0 || !isdigit(opt_arg[0])) { | |
650 | ERR("Wrong value in --live parameter: %s", opt_arg); | |
651 | ret = CMD_ERROR; | |
652 | goto end; | |
653 | } | |
654 | if (v != (uint32_t) v) { | |
655 | ERR("32-bit overflow in --live parameter: %s", opt_arg); | |
656 | ret = CMD_ERROR; | |
657 | goto end; | |
658 | } | |
0ed9e0be JG |
659 | if (v == 0) { |
660 | ERR("Live timer interval must be greater than zero"); | |
661 | ret = CMD_ERROR; | |
662 | goto end; | |
663 | } | |
ecc48a90 JD |
664 | opt_live_timer = (uint32_t) v; |
665 | DBG("Session live timer interval set to %d", opt_live_timer); | |
666 | break; | |
667 | } | |
f3ed775e | 668 | default: |
f3ed775e DG |
669 | ret = CMD_UNDEFINED; |
670 | goto end; | |
671 | } | |
672 | } | |
673 | ||
785d2d0d | 674 | if (opt_no_consumer) { |
96fe6b8d | 675 | MSG("The option --no-consumer is obsolete. Use --no-output now."); |
785d2d0d DG |
676 | ret = CMD_WARNING; |
677 | goto end; | |
678 | } | |
679 | ||
92360082 JG |
680 | /* Spawn a session daemon if needed */ |
681 | if (!opt_no_sessiond) { | |
682 | ret = launch_sessiond(); | |
683 | if (ret) { | |
684 | ret = CMD_ERROR; | |
685 | goto end; | |
686 | } | |
687 | } | |
688 | ||
acc09215 | 689 | /* MI initialization */ |
37d03ff7 JRJ |
690 | if (lttng_opt_mi) { |
691 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
692 | if (!writer) { | |
693 | ret = -LTTNG_ERR_NOMEM; | |
694 | goto end; | |
695 | } | |
696 | ||
697 | /* Open command element */ | |
698 | ret = mi_lttng_writer_command_open(writer, | |
699 | mi_lttng_element_command_create); | |
700 | if (ret) { | |
701 | ret = CMD_ERROR; | |
702 | goto end; | |
703 | } | |
704 | ||
705 | /* Open output element */ | |
706 | ret = mi_lttng_writer_open_element(writer, | |
707 | mi_lttng_element_command_output); | |
708 | if (ret) { | |
709 | ret = CMD_ERROR; | |
710 | goto end; | |
711 | } | |
712 | } | |
f3ed775e DG |
713 | opt_session_name = (char*) poptGetArg(pc); |
714 | ||
37d03ff7 JRJ |
715 | command_ret = create_session(); |
716 | if (command_ret) { | |
717 | success = 0; | |
718 | } | |
719 | ||
720 | if (lttng_opt_mi) { | |
721 | /* Close output element */ | |
722 | ret = mi_lttng_writer_close_element(writer); | |
723 | if (ret) { | |
724 | ret = CMD_ERROR; | |
725 | goto end; | |
726 | } | |
727 | ||
728 | /* Success ? */ | |
729 | ret = mi_lttng_writer_write_element_bool(writer, | |
730 | mi_lttng_element_command_success, success); | |
731 | if (ret) { | |
732 | ret = CMD_ERROR; | |
733 | goto end; | |
734 | } | |
735 | ||
736 | /* Command element close */ | |
737 | ret = mi_lttng_writer_command_close(writer); | |
738 | if (ret) { | |
739 | ret = CMD_ERROR; | |
740 | goto end; | |
741 | } | |
742 | } | |
f3ed775e DG |
743 | |
744 | end: | |
37d03ff7 JRJ |
745 | /* Mi clean-up */ |
746 | if (writer && mi_lttng_writer_destroy(writer)) { | |
747 | /* Preserve original error code */ | |
748 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
749 | } | |
750 | ||
acc09215 | 751 | /* Overwrite ret if an error occurred in create_session() */ |
37d03ff7 JRJ |
752 | ret = command_ret ? command_ret : ret; |
753 | ||
ca1c3607 | 754 | poptFreeContext(pc); |
f3ed775e DG |
755 | return ret; |
756 | } |