Commit | Line | Data |
---|---|---|
f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
b178f53e | 3 | * Copyright (C) 2019 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
f3ed775e | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
f3ed775e DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
f3ed775e DG |
17 | */ |
18 | ||
6c1c0768 | 19 | #define _LGPL_SOURCE |
a4b92340 | 20 | #include <assert.h> |
ecc48a90 | 21 | #include <ctype.h> |
f3ed775e DG |
22 | #include <popt.h> |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
389fbf04 | 28 | #include <common/compat/time.h> |
f3ed775e | 29 | #include <unistd.h> |
92360082 | 30 | #include <signal.h> |
bbd44cae | 31 | #include <sys/wait.h> |
f3ed775e | 32 | |
37d03ff7 JRJ |
33 | #include <common/mi-lttng.h> |
34 | ||
c399183f | 35 | #include "../command.h" |
679b4943 | 36 | #include "../utils.h" |
f3ed775e | 37 | |
00e2e675 | 38 | #include <common/defaults.h> |
42224349 | 39 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 40 | #include <common/uri.h> |
81b86775 | 41 | #include <common/utils.h> |
16f6f820 | 42 | #include <lttng/snapshot.h> |
b178f53e | 43 | #include <lttng/session-descriptor.h> |
42224349 | 44 | |
f3ed775e DG |
45 | static char *opt_output_path; |
46 | static char *opt_session_name; | |
a4b92340 DG |
47 | static char *opt_url; |
48 | static char *opt_ctrl_url; | |
49 | static char *opt_data_url; | |
d7ba1388 | 50 | static char *opt_shm_path; |
a4b92340 | 51 | static int opt_no_consumer; |
96fe6b8d | 52 | static int opt_no_output; |
16f6f820 | 53 | static int opt_snapshot; |
c7219617 | 54 | static uint32_t opt_live_timer; |
f3ed775e | 55 | |
4fc83d94 PP |
56 | #ifdef LTTNG_EMBED_HELP |
57 | static const char help_msg[] = | |
58 | #include <lttng-create.1.h> | |
59 | ; | |
60 | #endif | |
61 | ||
f3ed775e DG |
62 | enum { |
63 | OPT_HELP = 1, | |
679b4943 | 64 | OPT_LIST_OPTIONS, |
ecc48a90 | 65 | OPT_LIVE_TIMER, |
f3ed775e DG |
66 | }; |
67 | ||
b178f53e JG |
68 | enum output_type { |
69 | OUTPUT_NONE, | |
70 | OUTPUT_LOCAL, | |
71 | OUTPUT_NETWORK, | |
72 | OUTPUT_UNSPECIFIED, | |
73 | }; | |
37d03ff7 | 74 | |
b178f53e | 75 | static struct mi_writer *writer; |
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 | ||
37d03ff7 | 92 | /* |
485ca16f | 93 | * Retrieve the created session and mi output it based on provided argument |
37d03ff7 JRJ |
94 | * This is currently a summary of what was pretty printed and is subject to |
95 | * enhancements. | |
37d03ff7 JRJ |
96 | */ |
97 | static int mi_created_session(const char *session_name) | |
98 | { | |
99 | int ret, i, count, found; | |
100 | struct lttng_session *sessions; | |
101 | ||
102 | /* session_name should not be null */ | |
103 | assert(session_name); | |
104 | assert(writer); | |
105 | ||
106 | count = lttng_list_sessions(&sessions); | |
107 | if (count < 0) { | |
108 | ret = count; | |
109 | ERR("%s", lttng_strerror(ret)); | |
110 | goto error; | |
111 | } | |
112 | ||
113 | if (count == 0) { | |
114 | ERR("Error session creation failed: session %s not found", session_name); | |
115 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
116 | goto end; | |
117 | } | |
118 | ||
119 | found = 0; | |
120 | for (i = 0; i < count; i++) { | |
121 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
122 | found = 1; | |
123 | ret = mi_lttng_session(writer, &sessions[i], 0); | |
124 | if (ret) { | |
125 | goto error; | |
126 | } | |
127 | break; | |
128 | } | |
129 | } | |
130 | ||
131 | if (!found) { | |
132 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
133 | } else { | |
134 | ret = CMD_SUCCESS; | |
135 | } | |
136 | ||
137 | error: | |
138 | free(sessions); | |
139 | end: | |
140 | return ret; | |
141 | } | |
142 | ||
b178f53e JG |
143 | static |
144 | struct lttng_session_descriptor *create_session_descriptor(void) | |
16f6f820 DG |
145 | { |
146 | int ret; | |
b178f53e JG |
147 | ssize_t uri_count; |
148 | enum output_type output_type; | |
149 | struct lttng_uri *uris = NULL; | |
150 | struct lttng_session_descriptor *descriptor = NULL; | |
151 | const char *uri_str1 = NULL, *uri_str2 = NULL; | |
152 | char local_output_path[LTTNG_PATH_MAX] = {}; | |
153 | ||
154 | if (opt_no_output) { | |
155 | output_type = OUTPUT_NONE; | |
156 | } else if (opt_output_path) { | |
157 | char *expanded_output_path; | |
158 | ||
159 | output_type = OUTPUT_LOCAL; | |
160 | expanded_output_path = utils_expand_path(opt_output_path); | |
161 | if (!expanded_output_path) { | |
162 | ERR("Failed to expand output path."); | |
163 | goto end; | |
164 | } | |
165 | ret = lttng_strncpy(local_output_path, expanded_output_path, | |
166 | sizeof(local_output_path)); | |
167 | free(expanded_output_path); | |
168 | if (ret) { | |
169 | ERR("Output path exceeds the maximal supported length (%zu bytes)", | |
170 | sizeof(local_output_path)); | |
171 | goto end; | |
172 | } | |
173 | } else if (opt_url || opt_ctrl_url) { | |
174 | uri_str1 = opt_ctrl_url ? opt_ctrl_url : opt_url; | |
175 | uri_str2 = opt_data_url; | |
176 | ||
177 | uri_count = uri_parse_str_urls(uri_str1, uri_str2, &uris); | |
178 | if (uri_count != 1 && uri_count != 2) { | |
179 | ERR("Unrecognized URL format."); | |
180 | goto end; | |
181 | } | |
16f6f820 | 182 | |
b178f53e JG |
183 | switch (uri_count) { |
184 | case 1: | |
185 | output_type = OUTPUT_LOCAL; | |
186 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
187 | ERR("Unrecognized URL format."); | |
188 | goto end; | |
189 | } | |
190 | ret = lttng_strncpy(local_output_path, uris[0].dst.path, | |
191 | sizeof(local_output_path)); | |
192 | if (ret) { | |
193 | ERR("Output path exceeds the maximal supported length (%zu bytes)", | |
194 | sizeof(local_output_path)); | |
195 | } | |
196 | break; | |
197 | case 2: | |
198 | output_type = OUTPUT_NETWORK; | |
199 | break; | |
200 | default: | |
201 | /* Already checked. */ | |
202 | abort(); | |
203 | } | |
204 | } else { | |
205 | output_type = OUTPUT_UNSPECIFIED; | |
16f6f820 DG |
206 | } |
207 | ||
b178f53e JG |
208 | if (opt_snapshot) { |
209 | /* Snapshot session. */ | |
210 | switch (output_type) { | |
211 | case OUTPUT_UNSPECIFIED: | |
212 | case OUTPUT_LOCAL: | |
213 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
214 | opt_session_name, | |
215 | output_type == OUTPUT_LOCAL ? | |
216 | local_output_path : NULL); | |
217 | break; | |
218 | case OUTPUT_NONE: | |
219 | descriptor = lttng_session_descriptor_snapshot_create( | |
220 | opt_session_name); | |
221 | break; | |
222 | case OUTPUT_NETWORK: | |
223 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
224 | opt_session_name, uri_str1, uri_str2); | |
225 | break; | |
226 | default: | |
227 | abort(); | |
16f6f820 | 228 | } |
b178f53e JG |
229 | } else if (opt_live_timer) { |
230 | /* Live session. */ | |
231 | if (output_type != OUTPUT_UNSPECIFIED && | |
232 | output_type != OUTPUT_NETWORK) { | |
233 | ERR("Unsupported output type specified for live session."); | |
234 | goto end; | |
235 | } | |
236 | descriptor = lttng_session_descriptor_live_network_create( | |
237 | opt_session_name, uri_str1, uri_str2, | |
238 | opt_live_timer); | |
b178f53e JG |
239 | } else { |
240 | /* Regular session. */ | |
241 | switch (output_type) { | |
242 | case OUTPUT_UNSPECIFIED: | |
243 | case OUTPUT_LOCAL: | |
244 | descriptor = lttng_session_descriptor_local_create( | |
245 | opt_session_name, | |
246 | output_type == OUTPUT_LOCAL ? | |
247 | local_output_path : NULL); | |
248 | break; | |
249 | case OUTPUT_NONE: | |
250 | descriptor = lttng_session_descriptor_create( | |
251 | opt_session_name); | |
252 | break; | |
253 | case OUTPUT_NETWORK: | |
254 | descriptor = lttng_session_descriptor_network_create( | |
255 | opt_session_name, uri_str1, uri_str2); | |
256 | break; | |
257 | default: | |
258 | abort(); | |
16f6f820 DG |
259 | } |
260 | } | |
b178f53e JG |
261 | if (!descriptor) { |
262 | ERR("Failed to initialize session creation command."); | |
973ad93e JG |
263 | } else { |
264 | /* | |
265 | * Auto-launch the relay daemon when a live session | |
266 | * is created using default URLs. | |
267 | */ | |
268 | if (!opt_url && !opt_ctrl_url && !opt_data_url && | |
269 | opt_live_timer && !check_relayd()) { | |
270 | int ret; | |
271 | const char *pathname = opt_relayd_path ? : | |
272 | INSTALL_BIN_PATH "/lttng-relayd"; | |
273 | ||
274 | ret = spawn_relayd(pathname, 0); | |
275 | if (ret < 0) { | |
276 | lttng_session_descriptor_destroy(descriptor); | |
277 | descriptor = NULL; | |
278 | } | |
279 | } | |
16f6f820 | 280 | } |
b178f53e JG |
281 | end: |
282 | free(uris); | |
283 | return descriptor; | |
16f6f820 DG |
284 | } |
285 | ||
f3ed775e | 286 | /* |
1c8d13c8 TD |
287 | * Create a tracing session. |
288 | * If no name is specified, a default name is generated. | |
f3ed775e | 289 | * |
1c8d13c8 | 290 | * Returns one of the CMD_* result constants. |
f3ed775e | 291 | */ |
a4b92340 | 292 | static int create_session(void) |
f3ed775e | 293 | { |
b178f53e JG |
294 | int ret, i; |
295 | char shm_path[LTTNG_PATH_MAX] = {}; | |
296 | struct lttng_session_descriptor *session_descriptor = NULL; | |
297 | enum lttng_session_descriptor_status descriptor_status; | |
298 | enum lttng_error_code ret_code; | |
299 | struct lttng_session *sessions = NULL; | |
300 | const struct lttng_session *created_session = NULL; | |
301 | const char *created_session_name; | |
302 | ||
303 | /* Validate options. */ | |
304 | if (opt_session_name) { | |
487b253b DG |
305 | if (strlen(opt_session_name) > NAME_MAX) { |
306 | ERR("Session name too long. Length must be lower or equal to %d", | |
307 | NAME_MAX); | |
b178f53e | 308 | ret = CMD_ERROR; |
487b253b DG |
309 | goto error; |
310 | } | |
4b861950 DG |
311 | /* |
312 | * Check if the session name begins with "auto-" or is exactly "auto". | |
313 | * Both are reserved for the default session name. See bug #449 to | |
314 | * understand why we need to check both here. | |
315 | */ | |
316 | if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-", | |
317 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) || | |
318 | (strncmp(opt_session_name, DEFAULT_SESSION_NAME, | |
61b35a5a | 319 | strlen(DEFAULT_SESSION_NAME)) == 0 && |
4b861950 | 320 | strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) { |
61b35a5a DG |
321 | ERR("%s is a reserved keyword for default session(s)", |
322 | DEFAULT_SESSION_NAME); | |
323 | ret = CMD_ERROR; | |
324 | goto error; | |
325 | } | |
f3ed775e DG |
326 | } |
327 | ||
b178f53e JG |
328 | if (opt_snapshot && opt_live_timer) { |
329 | ERR("Snapshot and live modes are mutually exclusive."); | |
1a241656 DG |
330 | ret = CMD_ERROR; |
331 | goto error; | |
332 | } | |
333 | ||
b178f53e JG |
334 | if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) { |
335 | ERR("Both control and data URLs must be specified."); | |
336 | ret = CMD_ERROR; | |
337 | goto error; | |
00e2e675 DG |
338 | } |
339 | ||
b178f53e JG |
340 | session_descriptor = create_session_descriptor(); |
341 | if (!session_descriptor) { | |
342 | ret = CMD_ERROR; | |
343 | goto error; | |
ecc48a90 | 344 | } |
b178f53e JG |
345 | ret_code = lttng_create_session_ext(session_descriptor); |
346 | if (ret_code != LTTNG_OK) { | |
347 | ERR("%s", lttng_strerror(-ret_code)); | |
ecc48a90 JD |
348 | ret = CMD_ERROR; |
349 | goto error; | |
350 | } | |
351 | ||
b178f53e JG |
352 | descriptor_status = lttng_session_descriptor_get_session_name( |
353 | session_descriptor, &created_session_name); | |
354 | if (descriptor_status != LTTNG_SESSION_DESCRIPTOR_STATUS_OK) { | |
355 | ERR("Failed to obtain created session name"); | |
356 | ret = CMD_ERROR; | |
357 | goto error; | |
16f6f820 | 358 | } |
b178f53e JG |
359 | |
360 | ret = lttng_list_sessions(&sessions); | |
f3ed775e | 361 | if (ret < 0) { |
b178f53e JG |
362 | ERR("Failed to fetch properties of created session: %s", |
363 | lttng_strerror(ret)); | |
364 | ret = CMD_ERROR; | |
365 | goto error; | |
366 | } | |
367 | for (i = 0; i < ret; i++) { | |
368 | if (!strcmp(created_session_name, sessions[i].name)) { | |
369 | created_session = &sessions[i]; | |
60e835ca | 370 | break; |
42224349 | 371 | } |
b178f53e JG |
372 | } |
373 | if (!created_session) { | |
374 | ERR("Failed to fetch properties of created session"); | |
375 | ret = CMD_ERROR; | |
f3ed775e DG |
376 | goto error; |
377 | } | |
378 | ||
b178f53e JG |
379 | if (opt_shm_path) { |
380 | char datetime_suffix[17] = {}; | |
381 | ||
382 | /* | |
383 | * An auto-generated session name already includes the creation | |
384 | * timestamp. | |
385 | */ | |
386 | if (opt_session_name) { | |
387 | uint64_t creation_time; | |
388 | struct tm *timeinfo; | |
389 | time_t creation_time_t; | |
390 | size_t strftime_ret; | |
391 | ||
392 | ret_code = lttng_session_get_creation_time( | |
393 | created_session, | |
394 | &creation_time); | |
395 | if (ret_code != LTTNG_OK) { | |
396 | ERR("%s", lttng_strerror(-ret_code)); | |
397 | ret = CMD_ERROR; | |
398 | goto error; | |
399 | } | |
400 | creation_time_t = (time_t) creation_time; | |
401 | timeinfo = localtime(&creation_time_t); | |
402 | if (!timeinfo) { | |
403 | PERROR("Failed to interpret session creation time"); | |
404 | ret = CMD_ERROR; | |
405 | goto error; | |
406 | } | |
407 | strftime_ret = strftime(datetime_suffix, | |
408 | sizeof(datetime_suffix), | |
409 | "-%Y%m%d-%H%M%S", timeinfo); | |
410 | if (strftime_ret == 0) { | |
411 | ERR("Failed to format session creation time."); | |
412 | ret = CMD_ERROR; | |
413 | goto error; | |
414 | } | |
a4b92340 | 415 | } |
4f50c803 | 416 | |
d7ba1388 | 417 | ret = snprintf(shm_path, sizeof(shm_path), |
b178f53e JG |
418 | "%s/%s%s", opt_shm_path, created_session_name, |
419 | datetime_suffix); | |
420 | if (ret < 0 || ret >= sizeof(shm_path)) { | |
421 | ERR("Failed to format the shared memory path."); | |
422 | ret = CMD_ERROR; | |
d7ba1388 MD |
423 | goto error; |
424 | } | |
b178f53e JG |
425 | ret = lttng_set_session_shm_path(created_session_name, |
426 | shm_path); | |
d7ba1388 | 427 | if (ret < 0) { |
b178f53e JG |
428 | lttng_destroy_session(created_session_name); |
429 | ret = CMD_ERROR; | |
d7ba1388 MD |
430 | goto error; |
431 | } | |
432 | } | |
433 | ||
b178f53e JG |
434 | if (opt_snapshot) { |
435 | MSG("Snapshot session %s created.", created_session_name); | |
436 | } else if (opt_live_timer) { | |
437 | MSG("Live session %s created.", created_session_name); | |
438 | } else { | |
439 | MSG("Session %s created.", created_session_name); | |
440 | } | |
441 | ||
442 | if (*created_session->path && !opt_snapshot) { | |
443 | MSG("Traces will be output to %s", created_session->path); | |
d73c5802 DG |
444 | |
445 | if (opt_live_timer) { | |
b178f53e JG |
446 | MSG("Live timer interval set to %u %s", opt_live_timer, |
447 | USEC_UNIT); | |
d73c5802 | 448 | } |
16f6f820 | 449 | } else if (opt_snapshot) { |
b178f53e JG |
450 | struct lttng_snapshot_output_list *list; |
451 | struct lttng_snapshot_output *iter; | |
452 | char snapshot_url[LTTNG_PATH_MAX] = {}; | |
453 | ||
454 | ret = lttng_snapshot_list_output(created_session_name, &list); | |
455 | if (ret < 0) { | |
456 | ERR("Failed to list snapshot outputs."); | |
457 | ret = CMD_ERROR; | |
458 | goto error; | |
16f6f820 | 459 | } |
b178f53e JG |
460 | |
461 | while ((iter = lttng_snapshot_output_list_get_next(list))) { | |
462 | const char *url = NULL; | |
463 | ||
464 | url = lttng_snapshot_output_get_ctrl_url( | |
465 | iter); | |
466 | ret = lttng_strncpy(snapshot_url, url, | |
467 | sizeof(snapshot_url)); | |
468 | if (ret) { | |
469 | snapshot_url[0] = '\0'; | |
470 | ERR("Failed to retrieve snapshot output destination"); | |
471 | } | |
472 | break; | |
473 | } | |
474 | lttng_snapshot_output_list_destroy(list); | |
475 | ||
476 | if (*snapshot_url) { | |
477 | MSG("Default snapshot output set to %s", | |
478 | snapshot_url); | |
479 | } | |
480 | MSG("Every channel enabled for this session will be set to mmap output and default to overwrite mode."); | |
a4b92340 | 481 | } |
d7ba1388 | 482 | if (opt_shm_path) { |
b178f53e | 483 | MSG("Shared memory path set to %s", shm_path); |
d7ba1388 | 484 | } |
a4b92340 | 485 | |
37d03ff7 JRJ |
486 | /* Mi output */ |
487 | if (lttng_opt_mi) { | |
b178f53e | 488 | ret = mi_created_session(created_session_name); |
37d03ff7 JRJ |
489 | if (ret) { |
490 | ret = CMD_ERROR; | |
491 | goto error; | |
492 | } | |
493 | } | |
494 | ||
58a97671 | 495 | /* Init lttng session config */ |
b178f53e | 496 | ret = config_init(created_session_name); |
f3ed775e | 497 | if (ret < 0) { |
27089920 | 498 | ret = CMD_ERROR; |
f3ed775e DG |
499 | goto error; |
500 | } | |
501 | ||
f3ed775e | 502 | ret = CMD_SUCCESS; |
f3ed775e | 503 | error: |
b178f53e JG |
504 | lttng_session_descriptor_destroy(session_descriptor); |
505 | free(sessions); | |
f3ed775e DG |
506 | return ret; |
507 | } | |
508 | ||
92360082 JG |
509 | /* |
510 | * spawn_sessiond | |
511 | * | |
512 | * Spawn a session daemon by forking and execv. | |
513 | */ | |
514 | static int spawn_sessiond(char *pathname) | |
515 | { | |
516 | int ret = 0; | |
517 | pid_t pid; | |
518 | ||
519 | MSG("Spawning a session daemon"); | |
92360082 JG |
520 | pid = fork(); |
521 | if (pid == 0) { | |
522 | /* | |
bbd44cae | 523 | * Spawn session daemon in daemon mode. |
92360082 | 524 | */ |
bbd44cae PP |
525 | execlp(pathname, "lttng-sessiond", |
526 | "--daemonize", NULL); | |
92360082 JG |
527 | /* execlp only returns if error happened */ |
528 | if (errno == ENOENT) { | |
529 | ERR("No session daemon found. Use --sessiond-path."); | |
530 | } else { | |
531 | PERROR("execlp"); | |
532 | } | |
533 | kill(getppid(), SIGTERM); /* wake parent */ | |
534 | exit(EXIT_FAILURE); | |
535 | } else if (pid > 0) { | |
92360082 | 536 | /* |
bbd44cae PP |
537 | * In daemon mode (--daemonize), sessiond only exits when |
538 | * it's ready to accept commands. | |
92360082 | 539 | */ |
bbd44cae | 540 | for (;;) { |
81527d36 JG |
541 | int status; |
542 | pid_t wait_pid_ret = waitpid(pid, &status, 0); | |
543 | ||
544 | if (wait_pid_ret < 0) { | |
545 | if (errno == EINTR) { | |
546 | continue; | |
547 | } | |
548 | PERROR("waitpid"); | |
549 | ret = -errno; | |
550 | goto end; | |
551 | } | |
bbd44cae PP |
552 | |
553 | if (WIFSIGNALED(status)) { | |
554 | ERR("Session daemon was killed by signal %d", | |
555 | WTERMSIG(status)); | |
556 | ret = -1; | |
557 | goto end; | |
558 | } else if (WIFEXITED(status)) { | |
559 | DBG("Session daemon terminated normally (exit status: %d)", | |
560 | WEXITSTATUS(status)); | |
561 | ||
562 | if (WEXITSTATUS(status) != 0) { | |
563 | ERR("Session daemon terminated with an error (exit status: %d)", | |
564 | WEXITSTATUS(status)); | |
565 | ret = -1; | |
566 | goto end; | |
567 | } | |
568 | break; | |
569 | } | |
92360082 | 570 | } |
bbd44cae | 571 | |
92360082 JG |
572 | goto end; |
573 | } else { | |
574 | PERROR("fork"); | |
575 | ret = -1; | |
576 | goto end; | |
577 | } | |
578 | ||
579 | end: | |
580 | return ret; | |
581 | } | |
582 | ||
583 | /* | |
584 | * launch_sessiond | |
585 | * | |
586 | * Check if the session daemon is available using | |
587 | * the liblttngctl API for the check. If not, try to | |
588 | * spawn a daemon. | |
589 | */ | |
590 | static int launch_sessiond(void) | |
591 | { | |
592 | int ret; | |
593 | char *pathname = NULL; | |
594 | ||
595 | ret = lttng_session_daemon_alive(); | |
596 | if (ret) { | |
597 | /* Sessiond is alive, not an error */ | |
598 | ret = 0; | |
599 | goto end; | |
600 | } | |
601 | ||
602 | /* Try command line option path */ | |
603 | pathname = opt_sessiond_path; | |
604 | ||
605 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
606 | if (pathname == NULL) { | |
607 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); | |
608 | } | |
609 | ||
610 | /* Try with configured path */ | |
611 | if (pathname == NULL) { | |
612 | if (CONFIG_SESSIOND_BIN[0] != '\0') { | |
613 | pathname = CONFIG_SESSIOND_BIN; | |
614 | } | |
615 | } | |
616 | ||
617 | /* Try the default path */ | |
618 | if (pathname == NULL) { | |
619 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
620 | } | |
621 | ||
622 | DBG("Session daemon binary path: %s", pathname); | |
623 | ||
624 | /* Check existence and permissions */ | |
625 | ret = access(pathname, F_OK | X_OK); | |
626 | if (ret < 0) { | |
627 | ERR("No such file or access denied: %s", pathname); | |
628 | goto end; | |
629 | } | |
630 | ||
631 | ret = spawn_sessiond(pathname); | |
92360082 | 632 | end: |
0f4fa0d2 JG |
633 | if (ret) { |
634 | ERR("Problem occurred while launching session daemon (%s)", | |
635 | pathname); | |
636 | } | |
92360082 JG |
637 | return ret; |
638 | } | |
639 | ||
7b3f7be2 | 640 | static |
a8d119b5 JG |
641 | int validate_url_option_combination(void) |
642 | { | |
643 | int ret = 0; | |
644 | int used_count = 0; | |
645 | ||
646 | used_count += !!opt_url; | |
647 | used_count += !!opt_output_path; | |
648 | used_count += (opt_data_url || opt_ctrl_url); | |
649 | if (used_count > 1) { | |
650 | ERR("Only one of the --set-url, --ctrl-url/data-url, or --output options may be used at once."); | |
651 | ret = -1; | |
652 | } | |
653 | ||
654 | return ret; | |
655 | } | |
656 | ||
f3ed775e | 657 | /* |
74cc1d0f | 658 | * The 'create <options>' first level command |
1c8d13c8 TD |
659 | * |
660 | * Returns one of the CMD_* result constants. | |
f3ed775e DG |
661 | */ |
662 | int cmd_create(int argc, const char **argv) | |
663 | { | |
37d03ff7 | 664 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
ecc48a90 | 665 | char *opt_arg = NULL; |
68c7f6e5 | 666 | const char *leftover = NULL; |
f3ed775e DG |
667 | static poptContext pc; |
668 | ||
669 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
670 | poptReadDefaultConfig(pc, 0); | |
671 | ||
672 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
673 | switch (opt) { | |
674 | case OPT_HELP: | |
4ba92f18 | 675 | SHOW_HELP(); |
f3ed775e | 676 | goto end; |
679b4943 SM |
677 | case OPT_LIST_OPTIONS: |
678 | list_cmd_options(stdout, long_options); | |
679b4943 | 679 | goto end; |
ecc48a90 JD |
680 | case OPT_LIVE_TIMER: |
681 | { | |
c7219617 | 682 | uint64_t v; |
ecc48a90 JD |
683 | |
684 | errno = 0; | |
685 | opt_arg = poptGetOptArg(pc); | |
d73c5802 DG |
686 | if (!opt_arg) { |
687 | /* Set up default values. */ | |
688 | opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER; | |
689 | DBG("Session live timer interval set to default value %d", | |
690 | opt_live_timer); | |
691 | break; | |
692 | } | |
693 | ||
c7219617 SM |
694 | if (utils_parse_time_suffix(opt_arg, &v) < 0) { |
695 | ERR("Wrong value for --live parameter: %s", opt_arg); | |
ecc48a90 JD |
696 | ret = CMD_ERROR; |
697 | goto end; | |
698 | } | |
c7219617 | 699 | |
ecc48a90 JD |
700 | if (v != (uint32_t) v) { |
701 | ERR("32-bit overflow in --live parameter: %s", opt_arg); | |
702 | ret = CMD_ERROR; | |
703 | goto end; | |
704 | } | |
c7219617 | 705 | |
0ed9e0be JG |
706 | if (v == 0) { |
707 | ERR("Live timer interval must be greater than zero"); | |
708 | ret = CMD_ERROR; | |
709 | goto end; | |
710 | } | |
c7219617 | 711 | |
ecc48a90 JD |
712 | opt_live_timer = (uint32_t) v; |
713 | DBG("Session live timer interval set to %d", opt_live_timer); | |
714 | break; | |
715 | } | |
f3ed775e | 716 | default: |
f3ed775e DG |
717 | ret = CMD_UNDEFINED; |
718 | goto end; | |
719 | } | |
720 | } | |
721 | ||
785d2d0d | 722 | if (opt_no_consumer) { |
96fe6b8d | 723 | MSG("The option --no-consumer is obsolete. Use --no-output now."); |
785d2d0d DG |
724 | ret = CMD_WARNING; |
725 | goto end; | |
726 | } | |
727 | ||
a8d119b5 JG |
728 | ret = validate_url_option_combination(); |
729 | if (ret) { | |
730 | ret = CMD_ERROR; | |
731 | goto end; | |
732 | } | |
733 | ||
92360082 JG |
734 | /* Spawn a session daemon if needed */ |
735 | if (!opt_no_sessiond) { | |
736 | ret = launch_sessiond(); | |
737 | if (ret) { | |
738 | ret = CMD_ERROR; | |
739 | goto end; | |
740 | } | |
741 | } | |
742 | ||
acc09215 | 743 | /* MI initialization */ |
37d03ff7 JRJ |
744 | if (lttng_opt_mi) { |
745 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
746 | if (!writer) { | |
747 | ret = -LTTNG_ERR_NOMEM; | |
748 | goto end; | |
749 | } | |
750 | ||
751 | /* Open command element */ | |
752 | ret = mi_lttng_writer_command_open(writer, | |
753 | mi_lttng_element_command_create); | |
754 | if (ret) { | |
755 | ret = CMD_ERROR; | |
756 | goto end; | |
757 | } | |
758 | ||
759 | /* Open output element */ | |
760 | ret = mi_lttng_writer_open_element(writer, | |
761 | mi_lttng_element_command_output); | |
762 | if (ret) { | |
763 | ret = CMD_ERROR; | |
764 | goto end; | |
765 | } | |
766 | } | |
f3ed775e DG |
767 | opt_session_name = (char*) poptGetArg(pc); |
768 | ||
68c7f6e5 JD |
769 | leftover = poptGetArg(pc); |
770 | if (leftover) { | |
771 | ERR("Unknown argument: %s", leftover); | |
772 | ret = CMD_ERROR; | |
773 | goto end; | |
774 | } | |
775 | ||
37d03ff7 JRJ |
776 | command_ret = create_session(); |
777 | if (command_ret) { | |
778 | success = 0; | |
779 | } | |
780 | ||
781 | if (lttng_opt_mi) { | |
782 | /* Close output element */ | |
783 | ret = mi_lttng_writer_close_element(writer); | |
784 | if (ret) { | |
785 | ret = CMD_ERROR; | |
786 | goto end; | |
787 | } | |
788 | ||
789 | /* Success ? */ | |
790 | ret = mi_lttng_writer_write_element_bool(writer, | |
791 | mi_lttng_element_command_success, success); | |
792 | if (ret) { | |
793 | ret = CMD_ERROR; | |
794 | goto end; | |
795 | } | |
796 | ||
797 | /* Command element close */ | |
798 | ret = mi_lttng_writer_command_close(writer); | |
799 | if (ret) { | |
800 | ret = CMD_ERROR; | |
801 | goto end; | |
802 | } | |
803 | } | |
f3ed775e DG |
804 | |
805 | end: | |
37d03ff7 JRJ |
806 | /* Mi clean-up */ |
807 | if (writer && mi_lttng_writer_destroy(writer)) { | |
808 | /* Preserve original error code */ | |
809 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
810 | } | |
811 | ||
acc09215 | 812 | /* Overwrite ret if an error occurred in create_session() */ |
37d03ff7 JRJ |
813 | ret = command_ret ? command_ret : ret; |
814 | ||
ca1c3607 | 815 | poptFreeContext(pc); |
f3ed775e DG |
816 | return ret; |
817 | } |