Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
82a3637f DG |
2 | * liblttngctl.c |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
fac6795d | 7 | * |
d14d33bf AM |
8 | * This library is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
10 | * as published by the Free Software Foundation. | |
82a3637f DG |
11 | * |
12 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. | |
16 | * | |
d14d33bf AM |
17 | * You should have received a copy of the GNU Lesser General Public License |
18 | * along with this library; if not, write to the Free Software Foundation, | |
19 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
20 | */ |
21 | ||
22 | #define _GNU_SOURCE | |
44a5e5eb | 23 | #include <assert.h> |
fac6795d | 24 | #include <grp.h> |
1e307fab | 25 | #include <errno.h> |
fac6795d DG |
26 | #include <stdio.h> |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
990570ed DG |
31 | #include <common/common.h> |
32 | #include <common/defaults.h> | |
db758600 | 33 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
1e307fab | 36 | #include <lttng/lttng.h> |
fac6795d | 37 | |
d00c599e DG |
38 | #include "filter/filter-ast.h" |
39 | #include "filter/filter-parser.h" | |
40 | #include "filter/filter-bytecode.h" | |
41 | #include "filter/memstream.h" | |
cac3069d | 42 | #include "lttng-ctl-helper.h" |
53a80697 MD |
43 | |
44 | #ifdef DEBUG | |
d00c599e | 45 | static const int print_xml = 1; |
53a80697 MD |
46 | #define dbg_printf(fmt, args...) \ |
47 | printf("[debug liblttng-ctl] " fmt, ## args) | |
48 | #else | |
d00c599e | 49 | static const int print_xml = 0; |
53a80697 MD |
50 | #define dbg_printf(fmt, args...) \ |
51 | do { \ | |
52 | /* do nothing but check printf format */ \ | |
53 | if (0) \ | |
54 | printf("[debug liblttnctl] " fmt, ## args); \ | |
55 | } while (0) | |
56 | #endif | |
57 | ||
58 | ||
fac6795d DG |
59 | /* Socket to session daemon for communication */ |
60 | static int sessiond_socket; | |
61 | static char sessiond_sock_path[PATH_MAX]; | |
44a5e5eb | 62 | static char health_sock_path[PATH_MAX]; |
fac6795d | 63 | |
fac6795d DG |
64 | /* Variables */ |
65 | static char *tracing_group; | |
66 | static int connected; | |
67 | ||
97e19046 DG |
68 | /* Global */ |
69 | ||
70 | /* | |
71 | * Those two variables are used by error.h to silent or control the verbosity of | |
72 | * error message. They are global to the library so application linking with it | |
73 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
74 | */ |
75 | int lttng_opt_quiet; | |
76 | int lttng_opt_verbose; | |
77 | ||
99497cd0 MD |
78 | /* |
79 | * Copy string from src to dst and enforce null terminated byte. | |
80 | */ | |
cac3069d DG |
81 | LTTNG_HIDDEN |
82 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 83 | { |
e7d6716d | 84 | if (src && dst) { |
99497cd0 MD |
85 | strncpy(dst, src, len); |
86 | /* Enforce the NULL terminated byte */ | |
87 | dst[len - 1] = '\0'; | |
cd80958d DG |
88 | } else if (dst) { |
89 | dst[0] = '\0'; | |
99497cd0 MD |
90 | } |
91 | } | |
92 | ||
fac6795d | 93 | /* |
cd80958d | 94 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 95 | * |
cd80958d DG |
96 | * If domain is unknown, default domain will be the kernel. |
97 | */ | |
cac3069d DG |
98 | LTTNG_HIDDEN |
99 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
100 | struct lttng_domain *src) | |
cd80958d DG |
101 | { |
102 | if (src && dst) { | |
103 | switch (src->type) { | |
00e2e675 DG |
104 | case LTTNG_DOMAIN_KERNEL: |
105 | case LTTNG_DOMAIN_UST: | |
00e2e675 DG |
106 | memcpy(dst, src, sizeof(struct lttng_domain)); |
107 | break; | |
108 | default: | |
109 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 110 | break; |
cd80958d DG |
111 | } |
112 | } | |
113 | } | |
114 | ||
115 | /* | |
116 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 117 | * |
1c8d13c8 TD |
118 | * On success, returns the number of bytes sent (>=0) |
119 | * On error, returns -1 | |
fac6795d | 120 | */ |
cd80958d | 121 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
122 | { |
123 | int ret; | |
124 | ||
125 | if (!connected) { | |
2f70b271 | 126 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 127 | goto end; |
fac6795d DG |
128 | } |
129 | ||
a4b92340 DG |
130 | DBG("LSM cmd type : %d", lsm->cmd_type); |
131 | ||
be040666 | 132 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 133 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
134 | if (ret < 0) { |
135 | ret = -LTTNG_ERR_FATAL; | |
136 | } | |
e065084a DG |
137 | |
138 | end: | |
139 | return ret; | |
140 | } | |
141 | ||
53a80697 MD |
142 | /* |
143 | * Send var len data to the session daemon. | |
144 | * | |
145 | * On success, returns the number of bytes sent (>=0) | |
146 | * On error, returns -1 | |
147 | */ | |
148 | static int send_session_varlen(void *data, size_t len) | |
149 | { | |
150 | int ret; | |
151 | ||
152 | if (!connected) { | |
2f70b271 | 153 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
154 | goto end; |
155 | } | |
a4b92340 | 156 | |
53a80697 MD |
157 | if (!data || !len) { |
158 | ret = 0; | |
159 | goto end; | |
160 | } | |
161 | ||
162 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
163 | if (ret < 0) { |
164 | ret = -LTTNG_ERR_FATAL; | |
165 | } | |
53a80697 MD |
166 | |
167 | end: | |
168 | return ret; | |
169 | } | |
170 | ||
e065084a | 171 | /* |
cd80958d | 172 | * Receive data from the sessiond socket. |
e065084a | 173 | * |
1c8d13c8 TD |
174 | * On success, returns the number of bytes received (>=0) |
175 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 176 | */ |
ca95a216 | 177 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
178 | { |
179 | int ret; | |
180 | ||
181 | if (!connected) { | |
2f70b271 | 182 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 183 | goto end; |
fac6795d DG |
184 | } |
185 | ||
ca95a216 | 186 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
187 | if (ret < 0) { |
188 | ret = -LTTNG_ERR_FATAL; | |
189 | } | |
fac6795d | 190 | |
e065084a | 191 | end: |
fac6795d DG |
192 | return ret; |
193 | } | |
194 | ||
195 | /* | |
1c8d13c8 | 196 | * Check if we are in the specified group. |
65beb5ff | 197 | * |
2269e89e | 198 | * If yes return 1, else return -1. |
947308c4 DG |
199 | */ |
200 | static int check_tracing_group(const char *grp_name) | |
201 | { | |
202 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
203 | gid_t *grp_list; | |
204 | int grp_list_size, grp_id, i; | |
205 | int ret = -1; | |
206 | ||
207 | /* Get GID of group 'tracing' */ | |
208 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
209 | if (!grp_tracing) { |
210 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
211 | goto end; |
212 | } | |
213 | ||
214 | /* Get number of supplementary group IDs */ | |
215 | grp_list_size = getgroups(0, NULL); | |
216 | if (grp_list_size < 0) { | |
217 | perror("getgroups"); | |
218 | goto end; | |
219 | } | |
220 | ||
221 | /* Alloc group list of the right size */ | |
222 | grp_list = malloc(grp_list_size * sizeof(gid_t)); | |
00795392 | 223 | if (!grp_list) { |
1c8d13c8 | 224 | perror("malloc"); |
00795392 MD |
225 | goto end; |
226 | } | |
947308c4 | 227 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 228 | if (grp_id < 0) { |
947308c4 DG |
229 | perror("getgroups"); |
230 | goto free_list; | |
231 | } | |
232 | ||
233 | for (i = 0; i < grp_list_size; i++) { | |
234 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 235 | ret = 1; |
947308c4 DG |
236 | break; |
237 | } | |
238 | } | |
239 | ||
240 | free_list: | |
241 | free(grp_list); | |
242 | ||
243 | end: | |
244 | return ret; | |
245 | } | |
246 | ||
247 | /* | |
2269e89e DG |
248 | * Try connect to session daemon with sock_path. |
249 | * | |
250 | * Return 0 on success, else -1 | |
251 | */ | |
252 | static int try_connect_sessiond(const char *sock_path) | |
253 | { | |
254 | int ret; | |
255 | ||
256 | /* If socket exist, we check if the daemon listens for connect. */ | |
257 | ret = access(sock_path, F_OK); | |
258 | if (ret < 0) { | |
259 | /* Not alive */ | |
2f70b271 | 260 | goto error; |
2269e89e DG |
261 | } |
262 | ||
263 | ret = lttcomm_connect_unix_sock(sock_path); | |
264 | if (ret < 0) { | |
265 | /* Not alive */ | |
2f70b271 | 266 | goto error; |
2269e89e DG |
267 | } |
268 | ||
269 | ret = lttcomm_close_unix_sock(ret); | |
270 | if (ret < 0) { | |
271 | perror("lttcomm_close_unix_sock"); | |
272 | } | |
273 | ||
274 | return 0; | |
2f70b271 DG |
275 | |
276 | error: | |
277 | return -1; | |
2269e89e DG |
278 | } |
279 | ||
280 | /* | |
2f70b271 DG |
281 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
282 | * variable. | |
283 | * | |
284 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
285 | * is somehow too long or ENOMEM). | |
947308c4 DG |
286 | */ |
287 | static int set_session_daemon_path(void) | |
288 | { | |
2269e89e DG |
289 | int in_tgroup = 0; /* In tracing group */ |
290 | uid_t uid; | |
291 | ||
292 | uid = getuid(); | |
947308c4 | 293 | |
2269e89e DG |
294 | if (uid != 0) { |
295 | /* Are we in the tracing group ? */ | |
296 | in_tgroup = check_tracing_group(tracing_group); | |
297 | } | |
298 | ||
08a9c49f | 299 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
300 | lttng_ctl_copy_string(sessiond_sock_path, |
301 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 302 | } |
2269e89e | 303 | |
08a9c49f | 304 | if (uid != 0) { |
c617c0c6 MD |
305 | int ret; |
306 | ||
08a9c49f TD |
307 | if (in_tgroup) { |
308 | /* Tracing group */ | |
309 | ret = try_connect_sessiond(sessiond_sock_path); | |
310 | if (ret >= 0) { | |
311 | goto end; | |
2269e89e | 312 | } |
08a9c49f | 313 | /* Global session daemon not available... */ |
2269e89e | 314 | } |
08a9c49f TD |
315 | /* ...or not in tracing group (and not root), default */ |
316 | ||
317 | /* | |
318 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
319 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
320 | */ | |
321 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 322 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 323 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 324 | goto error; |
947308c4 | 325 | } |
947308c4 | 326 | } |
08a9c49f | 327 | end: |
947308c4 | 328 | return 0; |
2f70b271 DG |
329 | |
330 | error: | |
331 | return -1; | |
947308c4 DG |
332 | } |
333 | ||
65beb5ff DG |
334 | /* |
335 | * Connect to the LTTng session daemon. | |
336 | * | |
337 | * On success, return 0. On error, return -1. | |
338 | */ | |
339 | static int connect_sessiond(void) | |
340 | { | |
341 | int ret; | |
342 | ||
343 | ret = set_session_daemon_path(); | |
344 | if (ret < 0) { | |
2f70b271 | 345 | goto error; |
65beb5ff DG |
346 | } |
347 | ||
348 | /* Connect to the sesssion daemon */ | |
349 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
350 | if (ret < 0) { | |
2f70b271 | 351 | goto error; |
65beb5ff DG |
352 | } |
353 | ||
354 | sessiond_socket = ret; | |
355 | connected = 1; | |
356 | ||
357 | return 0; | |
2f70b271 DG |
358 | |
359 | error: | |
360 | return -1; | |
65beb5ff DG |
361 | } |
362 | ||
363 | /* | |
1c8d13c8 TD |
364 | * Clean disconnect from the session daemon. |
365 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
366 | */ |
367 | static int disconnect_sessiond(void) | |
368 | { | |
369 | int ret = 0; | |
370 | ||
371 | if (connected) { | |
372 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
373 | sessiond_socket = 0; | |
374 | connected = 0; | |
375 | } | |
376 | ||
377 | return ret; | |
378 | } | |
379 | ||
35a6fdb7 | 380 | /* |
cd80958d | 381 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 382 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 383 | * |
af87c45a | 384 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 385 | */ |
cac3069d DG |
386 | LTTNG_HIDDEN |
387 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 388 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
389 | { |
390 | int ret; | |
391 | size_t size; | |
392 | void *data = NULL; | |
cd80958d | 393 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
394 | |
395 | ret = connect_sessiond(); | |
396 | if (ret < 0) { | |
2f70b271 | 397 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
398 | goto end; |
399 | } | |
400 | ||
65beb5ff | 401 | /* Send command to session daemon */ |
cd80958d | 402 | ret = send_session_msg(lsm); |
65beb5ff | 403 | if (ret < 0) { |
2f70b271 | 404 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
405 | goto end; |
406 | } | |
53a80697 MD |
407 | /* Send var len data */ |
408 | ret = send_session_varlen(vardata, varlen); | |
409 | if (ret < 0) { | |
2f70b271 | 410 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
411 | goto end; |
412 | } | |
65beb5ff DG |
413 | |
414 | /* Get header from data transmission */ | |
415 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
416 | if (ret < 0) { | |
2f70b271 | 417 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
418 | goto end; |
419 | } | |
420 | ||
421 | /* Check error code if OK */ | |
f73fabfd | 422 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
423 | ret = -llm.ret_code; |
424 | goto end; | |
425 | } | |
426 | ||
427 | size = llm.data_size; | |
428 | if (size == 0) { | |
874d3f84 | 429 | /* If client free with size 0 */ |
a45d5536 DG |
430 | if (buf != NULL) { |
431 | *buf = NULL; | |
432 | } | |
7d29a247 | 433 | ret = 0; |
65beb5ff DG |
434 | goto end; |
435 | } | |
436 | ||
437 | data = (void*) malloc(size); | |
438 | ||
439 | /* Get payload data */ | |
440 | ret = recv_data_sessiond(data, size); | |
441 | if (ret < 0) { | |
442 | free(data); | |
443 | goto end; | |
444 | } | |
445 | ||
83009e5e DG |
446 | /* |
447 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
448 | * this point, an error is returned and data is freed. | |
449 | */ | |
450 | if (buf == NULL) { | |
2f70b271 | 451 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
452 | free(data); |
453 | goto end; | |
454 | } | |
455 | ||
65beb5ff DG |
456 | *buf = data; |
457 | ret = size; | |
458 | ||
459 | end: | |
460 | disconnect_sessiond(); | |
461 | return ret; | |
462 | } | |
463 | ||
9f19cc17 | 464 | /* |
cd80958d | 465 | * Create lttng handle and return pointer. |
1c8d13c8 | 466 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 467 | */ |
cd80958d DG |
468 | struct lttng_handle *lttng_create_handle(const char *session_name, |
469 | struct lttng_domain *domain) | |
9f19cc17 | 470 | { |
2f70b271 DG |
471 | struct lttng_handle *handle = NULL; |
472 | ||
473 | if (domain == NULL) { | |
474 | goto end; | |
475 | } | |
cd80958d DG |
476 | |
477 | handle = malloc(sizeof(struct lttng_handle)); | |
478 | if (handle == NULL) { | |
2f70b271 | 479 | PERROR("malloc handle"); |
cd80958d DG |
480 | goto end; |
481 | } | |
482 | ||
483 | /* Copy session name */ | |
cac3069d | 484 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
485 | sizeof(handle->session_name)); |
486 | ||
487 | /* Copy lttng domain */ | |
cac3069d | 488 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
489 | |
490 | end: | |
491 | return handle; | |
492 | } | |
493 | ||
494 | /* | |
495 | * Destroy handle by free(3) the pointer. | |
496 | */ | |
497 | void lttng_destroy_handle(struct lttng_handle *handle) | |
498 | { | |
0e428499 | 499 | free(handle); |
eb354453 DG |
500 | } |
501 | ||
d9800920 DG |
502 | /* |
503 | * Register an outside consumer. | |
1c8d13c8 | 504 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
505 | */ |
506 | int lttng_register_consumer(struct lttng_handle *handle, | |
507 | const char *socket_path) | |
508 | { | |
509 | struct lttcomm_session_msg lsm; | |
510 | ||
2f70b271 DG |
511 | if (handle == NULL || socket_path == NULL) { |
512 | return -LTTNG_ERR_INVALID; | |
513 | } | |
514 | ||
d9800920 | 515 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 516 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 517 | sizeof(lsm.session.name)); |
cac3069d | 518 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 519 | |
cac3069d | 520 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 521 | |
cac3069d | 522 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
523 | } |
524 | ||
1df4dedd | 525 | /* |
1c8d13c8 TD |
526 | * Start tracing for all traces of the session. |
527 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 528 | */ |
6a4f824d | 529 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 530 | { |
cd80958d DG |
531 | struct lttcomm_session_msg lsm; |
532 | ||
6a4f824d | 533 | if (session_name == NULL) { |
2f70b271 | 534 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
535 | } |
536 | ||
537 | lsm.cmd_type = LTTNG_START_TRACE; | |
6a4f824d | 538 | |
cac3069d DG |
539 | lttng_ctl_copy_string(lsm.session.name, session_name, |
540 | sizeof(lsm.session.name)); | |
cd80958d | 541 | |
cac3069d | 542 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 543 | } |
1df4dedd DG |
544 | |
545 | /* | |
38ee087f | 546 | * Stop tracing for all traces of the session. |
f3ed775e | 547 | */ |
38ee087f | 548 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 549 | { |
38ee087f | 550 | int ret, data_ret; |
cd80958d DG |
551 | struct lttcomm_session_msg lsm; |
552 | ||
6a4f824d | 553 | if (session_name == NULL) { |
2f70b271 | 554 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
555 | } |
556 | ||
cd80958d | 557 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 558 | |
cac3069d DG |
559 | lttng_ctl_copy_string(lsm.session.name, session_name, |
560 | sizeof(lsm.session.name)); | |
cd80958d | 561 | |
cac3069d | 562 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
563 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
564 | goto error; | |
565 | } | |
566 | ||
567 | if (!wait) { | |
568 | goto end; | |
569 | } | |
570 | ||
571 | _MSG("Waiting for data availability"); | |
572 | ||
573 | /* Check for data availability */ | |
574 | do { | |
6d805429 | 575 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
576 | if (data_ret < 0) { |
577 | /* Return the data available call error. */ | |
578 | ret = data_ret; | |
579 | goto error; | |
580 | } | |
581 | ||
582 | /* | |
583 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
584 | * returned value indicates availability. | |
585 | */ | |
6d805429 | 586 | if (data_ret) { |
38ee087f DG |
587 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
588 | _MSG("."); | |
589 | } | |
6d805429 | 590 | } while (data_ret != 0); |
38ee087f DG |
591 | |
592 | MSG(""); | |
593 | ||
594 | end: | |
595 | error: | |
596 | return ret; | |
597 | } | |
598 | ||
599 | /* | |
600 | * Stop tracing and wait for data availability. | |
601 | */ | |
602 | int lttng_stop_tracing(const char *session_name) | |
603 | { | |
604 | return _lttng_stop_tracing(session_name, 1); | |
605 | } | |
606 | ||
607 | /* | |
608 | * Stop tracing but _don't_ wait for data availability. | |
609 | */ | |
610 | int lttng_stop_tracing_no_wait(const char *session_name) | |
611 | { | |
612 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
613 | } |
614 | ||
615 | /* | |
601d5acf DG |
616 | * Add context to a channel. |
617 | * | |
618 | * If the given channel is NULL, add the contexts to all channels. | |
619 | * The event_name param is ignored. | |
af87c45a DG |
620 | * |
621 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 622 | */ |
cd80958d | 623 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
624 | struct lttng_event_context *ctx, const char *event_name, |
625 | const char *channel_name) | |
d65106b1 | 626 | { |
cd80958d DG |
627 | struct lttcomm_session_msg lsm; |
628 | ||
9d697d3d DG |
629 | /* Safety check. Both are mandatory */ |
630 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 631 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
632 | } |
633 | ||
441c16a7 MD |
634 | memset(&lsm, 0, sizeof(lsm)); |
635 | ||
cd80958d DG |
636 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
637 | ||
638 | /* Copy channel name */ | |
cac3069d | 639 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, |
cd80958d | 640 | sizeof(lsm.u.context.channel_name)); |
cd80958d | 641 | |
cac3069d | 642 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 643 | |
9d697d3d | 644 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 645 | |
cac3069d | 646 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
647 | sizeof(lsm.session.name)); |
648 | ||
cac3069d | 649 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
650 | } |
651 | ||
f3ed775e | 652 | /* |
1c8d13c8 TD |
653 | * Enable event(s) for a channel. |
654 | * If no event name is specified, all events are enabled. | |
655 | * If no channel name is specified, the default 'channel0' is used. | |
656 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 657 | */ |
cd80958d | 658 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 659 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 660 | { |
cd80958d DG |
661 | struct lttcomm_session_msg lsm; |
662 | ||
5117eeec | 663 | if (handle == NULL || ev == NULL) { |
2f70b271 | 664 | return -LTTNG_ERR_INVALID; |
cd80958d | 665 | } |
33a2b854 | 666 | |
441c16a7 MD |
667 | memset(&lsm, 0, sizeof(lsm)); |
668 | ||
5117eeec | 669 | /* If no channel name, we put the default name */ |
94cf3c47 | 670 | if (channel_name == NULL) { |
cac3069d | 671 | lttng_ctl_copy_string(lsm.u.enable.channel_name, DEFAULT_CHANNEL_NAME, |
cd80958d | 672 | sizeof(lsm.u.enable.channel_name)); |
33a2b854 | 673 | } else { |
cac3069d | 674 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, |
cd80958d | 675 | sizeof(lsm.u.enable.channel_name)); |
eb354453 DG |
676 | } |
677 | ||
cac3069d | 678 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
0d0c377a | 679 | |
8c9ae521 | 680 | if (ev->name[0] != '\0') { |
cd80958d | 681 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
0d0c377a | 682 | } else { |
cd80958d | 683 | lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT; |
f3ed775e | 684 | } |
8c9ae521 | 685 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
f3ed775e | 686 | |
cac3069d | 687 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
688 | sizeof(lsm.session.name)); |
689 | ||
cac3069d | 690 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
1df4dedd DG |
691 | } |
692 | ||
53a80697 | 693 | /* |
025faf73 | 694 | * Create or enable an event with a filter expression. |
178191b3 | 695 | * |
53a80697 MD |
696 | * Return negative error value on error. |
697 | * Return size of returned session payload data if OK. | |
698 | */ | |
025faf73 | 699 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 700 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
701 | const char *filter_expression) |
702 | { | |
703 | struct lttcomm_session_msg lsm; | |
704 | struct filter_parser_ctx *ctx; | |
705 | FILE *fmem; | |
706 | int ret = 0; | |
707 | ||
52df2401 MD |
708 | if (!filter_expression) { |
709 | /* | |
710 | * Fall back to normal event enabling if no filter | |
711 | * specified. | |
712 | */ | |
713 | return lttng_enable_event(handle, event, channel_name); | |
714 | } | |
715 | ||
716 | /* | |
717 | * Empty filter string will always be rejected by the parser | |
718 | * anyway, so treat this corner-case early to eliminate | |
719 | * lttng_fmemopen error for 0-byte allocation. | |
720 | */ | |
721 | if (handle == NULL || filter_expression[0] == '\0') { | |
2f70b271 | 722 | return -LTTNG_ERR_INVALID; |
53a80697 MD |
723 | } |
724 | ||
53a80697 MD |
725 | /* |
726 | * casting const to non-const, as the underlying function will | |
727 | * use it in read-only mode. | |
728 | */ | |
729 | fmem = lttng_fmemopen((void *) filter_expression, | |
730 | strlen(filter_expression), "r"); | |
731 | if (!fmem) { | |
732 | fprintf(stderr, "Error opening memory as stream\n"); | |
ff7ef7b8 | 733 | return -LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
734 | } |
735 | ctx = filter_parser_ctx_alloc(fmem); | |
736 | if (!ctx) { | |
737 | fprintf(stderr, "Error allocating parser\n"); | |
ff7ef7b8 | 738 | ret = -LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
739 | goto alloc_error; |
740 | } | |
741 | ret = filter_parser_ctx_append_ast(ctx); | |
742 | if (ret) { | |
743 | fprintf(stderr, "Parse error\n"); | |
ff7ef7b8 | 744 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
745 | goto parse_error; |
746 | } | |
747 | ret = filter_visitor_set_parent(ctx); | |
748 | if (ret) { | |
749 | fprintf(stderr, "Set parent error\n"); | |
ff7ef7b8 | 750 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
751 | goto parse_error; |
752 | } | |
753 | if (print_xml) { | |
754 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
755 | if (ret) { | |
756 | fflush(stdout); | |
757 | fprintf(stderr, "XML print error\n"); | |
ff7ef7b8 | 758 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
759 | goto parse_error; |
760 | } | |
761 | } | |
762 | ||
763 | dbg_printf("Generating IR... "); | |
764 | fflush(stdout); | |
765 | ret = filter_visitor_ir_generate(ctx); | |
766 | if (ret) { | |
767 | fprintf(stderr, "Generate IR error\n"); | |
ff7ef7b8 | 768 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
769 | goto parse_error; |
770 | } | |
771 | dbg_printf("done\n"); | |
772 | ||
773 | dbg_printf("Validating IR... "); | |
774 | fflush(stdout); | |
775 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
776 | if (ret) { | |
ff7ef7b8 | 777 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
778 | goto parse_error; |
779 | } | |
780 | dbg_printf("done\n"); | |
781 | ||
782 | dbg_printf("Generating bytecode... "); | |
783 | fflush(stdout); | |
784 | ret = filter_visitor_bytecode_generate(ctx); | |
785 | if (ret) { | |
786 | fprintf(stderr, "Generate bytecode error\n"); | |
ff7ef7b8 | 787 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
788 | goto parse_error; |
789 | } | |
790 | dbg_printf("done\n"); | |
791 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
792 | bytecode_get_len(&ctx->bytecode->b)); | |
793 | ||
794 | memset(&lsm, 0, sizeof(lsm)); | |
795 | ||
025faf73 | 796 | lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_FILTER; |
53a80697 MD |
797 | |
798 | /* Copy channel name */ | |
cac3069d | 799 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, |
025faf73 | 800 | sizeof(lsm.u.enable.channel_name)); |
53a80697 | 801 | /* Copy event name */ |
178191b3 DG |
802 | if (event) { |
803 | memcpy(&lsm.u.enable.event, event, sizeof(lsm.u.enable.event)); | |
804 | } | |
805 | ||
025faf73 | 806 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) |
53a80697 MD |
807 | + bytecode_get_len(&ctx->bytecode->b); |
808 | ||
cac3069d | 809 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
53a80697 | 810 | |
cac3069d | 811 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
53a80697 MD |
812 | sizeof(lsm.session.name)); |
813 | ||
cac3069d | 814 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, &ctx->bytecode->b, |
025faf73 | 815 | lsm.u.enable.bytecode_len, NULL); |
53a80697 MD |
816 | |
817 | filter_bytecode_free(ctx); | |
818 | filter_ir_free(ctx); | |
819 | filter_parser_ctx_free(ctx); | |
820 | if (fclose(fmem) != 0) { | |
821 | perror("fclose"); | |
822 | } | |
823 | return ret; | |
824 | ||
825 | parse_error: | |
826 | filter_bytecode_free(ctx); | |
827 | filter_ir_free(ctx); | |
828 | filter_parser_ctx_free(ctx); | |
829 | alloc_error: | |
830 | if (fclose(fmem) != 0) { | |
831 | perror("fclose"); | |
832 | } | |
833 | return ret; | |
834 | } | |
835 | ||
1df4dedd | 836 | /* |
1c8d13c8 TD |
837 | * Disable event(s) of a channel and domain. |
838 | * If no event name is specified, all events are disabled. | |
839 | * If no channel name is specified, the default 'channel0' is used. | |
840 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 841 | */ |
cd80958d | 842 | int lttng_disable_event(struct lttng_handle *handle, const char *name, |
38057ed1 | 843 | const char *channel_name) |
1df4dedd | 844 | { |
cd80958d | 845 | struct lttcomm_session_msg lsm; |
1df4dedd | 846 | |
9d697d3d | 847 | if (handle == NULL) { |
2f70b271 | 848 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
849 | } |
850 | ||
441c16a7 MD |
851 | memset(&lsm, 0, sizeof(lsm)); |
852 | ||
cd80958d | 853 | if (channel_name) { |
cac3069d | 854 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 855 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 856 | } else { |
cac3069d | 857 | lttng_ctl_copy_string(lsm.u.disable.channel_name, DEFAULT_CHANNEL_NAME, |
cd80958d | 858 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
859 | } |
860 | ||
cac3069d | 861 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f5177a38 | 862 | |
f84efadf | 863 | if (name != NULL) { |
cac3069d DG |
864 | lttng_ctl_copy_string(lsm.u.disable.name, name, |
865 | sizeof(lsm.u.disable.name)); | |
cd80958d | 866 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f5177a38 | 867 | } else { |
cd80958d | 868 | lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT; |
f3ed775e DG |
869 | } |
870 | ||
cac3069d | 871 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
872 | sizeof(lsm.session.name)); |
873 | ||
cac3069d | 874 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
1df4dedd DG |
875 | } |
876 | ||
877 | /* | |
1c8d13c8 TD |
878 | * Enable channel per domain |
879 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 880 | */ |
cd80958d | 881 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 882 | struct lttng_channel *chan) |
a5c5a2bd | 883 | { |
cd80958d DG |
884 | struct lttcomm_session_msg lsm; |
885 | ||
5117eeec DG |
886 | /* |
887 | * NULL arguments are forbidden. No default values. | |
888 | */ | |
889 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 890 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
891 | } |
892 | ||
441c16a7 MD |
893 | memset(&lsm, 0, sizeof(lsm)); |
894 | ||
5117eeec | 895 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 896 | |
cd80958d DG |
897 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
898 | ||
cac3069d | 899 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 900 | |
cac3069d | 901 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
902 | sizeof(lsm.session.name)); |
903 | ||
cac3069d | 904 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 905 | } |
1df4dedd | 906 | |
2ef84c95 | 907 | /* |
1c8d13c8 TD |
908 | * All tracing will be stopped for registered events of the channel. |
909 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 910 | */ |
cd80958d | 911 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 912 | { |
cd80958d DG |
913 | struct lttcomm_session_msg lsm; |
914 | ||
9d697d3d DG |
915 | /* Safety check. Both are mandatory */ |
916 | if (handle == NULL || name == NULL) { | |
2f70b271 | 917 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
918 | } |
919 | ||
441c16a7 MD |
920 | memset(&lsm, 0, sizeof(lsm)); |
921 | ||
cd80958d | 922 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 923 | |
cac3069d | 924 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
925 | sizeof(lsm.u.disable.channel_name)); |
926 | ||
cac3069d | 927 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 928 | |
cac3069d | 929 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
930 | sizeof(lsm.session.name)); |
931 | ||
cac3069d | 932 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
933 | } |
934 | ||
fac6795d | 935 | /* |
1c8d13c8 TD |
936 | * Lists all available tracepoints of domain. |
937 | * Sets the contents of the events array. | |
938 | * Returns the number of lttng_event entries in events; | |
939 | * on error, returns a negative value. | |
fac6795d | 940 | */ |
cd80958d | 941 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 942 | struct lttng_event **events) |
fac6795d | 943 | { |
052da939 | 944 | int ret; |
cd80958d DG |
945 | struct lttcomm_session_msg lsm; |
946 | ||
9d697d3d | 947 | if (handle == NULL) { |
2f70b271 | 948 | return -LTTNG_ERR_INVALID; |
cd80958d | 949 | } |
fac6795d | 950 | |
cd80958d | 951 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 952 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 953 | |
cac3069d | 954 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
955 | if (ret < 0) { |
956 | return ret; | |
eb354453 | 957 | } |
fac6795d | 958 | |
9f19cc17 | 959 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
960 | } |
961 | ||
f37d259d MD |
962 | /* |
963 | * Lists all available tracepoint fields of domain. | |
964 | * Sets the contents of the event field array. | |
965 | * Returns the number of lttng_event_field entries in events; | |
966 | * on error, returns a negative value. | |
967 | */ | |
968 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
969 | struct lttng_event_field **fields) | |
970 | { | |
971 | int ret; | |
972 | struct lttcomm_session_msg lsm; | |
973 | ||
974 | if (handle == NULL) { | |
2f70b271 | 975 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
976 | } |
977 | ||
978 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; | |
cac3069d | 979 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 980 | |
cac3069d | 981 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
982 | if (ret < 0) { |
983 | return ret; | |
984 | } | |
985 | ||
986 | return ret / sizeof(struct lttng_event_field); | |
987 | } | |
988 | ||
1657e9bb | 989 | /* |
1c8d13c8 TD |
990 | * Returns a human readable string describing |
991 | * the error code (a negative value). | |
1657e9bb | 992 | */ |
9a745bc7 | 993 | const char *lttng_strerror(int code) |
1657e9bb | 994 | { |
f73fabfd | 995 | return error_get_str(code); |
1657e9bb DG |
996 | } |
997 | ||
aaf97519 | 998 | /* |
a4b92340 DG |
999 | * Create a brand new session using name and url for destination. |
1000 | * | |
f73fabfd | 1001 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1002 | */ |
a4b92340 | 1003 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1004 | { |
3dd05a85 | 1005 | int ret; |
a4b92340 | 1006 | ssize_t size; |
00e2e675 | 1007 | struct lttcomm_session_msg lsm; |
a4b92340 | 1008 | struct lttng_uri *uris = NULL; |
00e2e675 | 1009 | |
a4b92340 | 1010 | if (name == NULL) { |
2f70b271 | 1011 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1012 | } |
1013 | ||
a4b92340 | 1014 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1015 | |
a4b92340 | 1016 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1017 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1018 | |
1019 | /* There should never be a data URL */ | |
bc894455 | 1020 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1021 | if (size < 0) { |
2f70b271 | 1022 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1023 | } |
1024 | ||
a4b92340 DG |
1025 | lsm.u.uri.size = size; |
1026 | ||
cac3069d DG |
1027 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1028 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1029 | |
1030 | free(uris); | |
1031 | return ret; | |
00e2e675 DG |
1032 | } |
1033 | ||
8028d920 | 1034 | /* |
8028d920 | 1035 | * Destroy session using name. |
1c8d13c8 | 1036 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1037 | */ |
843f5df9 | 1038 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1039 | { |
cd80958d DG |
1040 | struct lttcomm_session_msg lsm; |
1041 | ||
843f5df9 | 1042 | if (session_name == NULL) { |
2f70b271 | 1043 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1044 | } |
1045 | ||
1046 | lsm.cmd_type = LTTNG_DESTROY_SESSION; | |
843f5df9 | 1047 | |
cac3069d DG |
1048 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1049 | sizeof(lsm.session.name)); | |
cd80958d | 1050 | |
cac3069d | 1051 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1052 | } |
1053 | ||
57167058 | 1054 | /* |
57167058 | 1055 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1056 | * Sets the contents of the sessions array. |
1057 | * Returns the number of lttng_session entries in sessions; | |
1058 | * on error, returns a negative value. | |
57167058 | 1059 | */ |
ca95a216 | 1060 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1061 | { |
ca95a216 | 1062 | int ret; |
cd80958d | 1063 | struct lttcomm_session_msg lsm; |
57167058 | 1064 | |
cd80958d | 1065 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1066 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1067 | if (ret < 0) { |
ca95a216 | 1068 | return ret; |
57167058 DG |
1069 | } |
1070 | ||
ca95a216 | 1071 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1072 | } |
1073 | ||
9f19cc17 | 1074 | /* |
1c8d13c8 TD |
1075 | * Ask the session daemon for all available domains of a session. |
1076 | * Sets the contents of the domains array. | |
1077 | * Returns the number of lttng_domain entries in domains; | |
1078 | * on error, returns a negative value. | |
9f19cc17 | 1079 | */ |
330be774 | 1080 | int lttng_list_domains(const char *session_name, |
cd80958d | 1081 | struct lttng_domain **domains) |
9f19cc17 DG |
1082 | { |
1083 | int ret; | |
cd80958d DG |
1084 | struct lttcomm_session_msg lsm; |
1085 | ||
330be774 | 1086 | if (session_name == NULL) { |
2f70b271 | 1087 | return -LTTNG_ERR_INVALID; |
cd80958d | 1088 | } |
9f19cc17 | 1089 | |
cd80958d DG |
1090 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1091 | ||
cac3069d DG |
1092 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1093 | sizeof(lsm.session.name)); | |
cd80958d | 1094 | |
cac3069d | 1095 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1096 | if (ret < 0) { |
1097 | return ret; | |
1098 | } | |
1099 | ||
1100 | return ret / sizeof(struct lttng_domain); | |
1101 | } | |
1102 | ||
1103 | /* | |
1c8d13c8 TD |
1104 | * Ask the session daemon for all available channels of a session. |
1105 | * Sets the contents of the channels array. | |
1106 | * Returns the number of lttng_channel entries in channels; | |
1107 | * on error, returns a negative value. | |
9f19cc17 | 1108 | */ |
cd80958d DG |
1109 | int lttng_list_channels(struct lttng_handle *handle, |
1110 | struct lttng_channel **channels) | |
9f19cc17 DG |
1111 | { |
1112 | int ret; | |
cd80958d DG |
1113 | struct lttcomm_session_msg lsm; |
1114 | ||
9d697d3d | 1115 | if (handle == NULL) { |
2f70b271 | 1116 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1117 | } |
1118 | ||
1119 | lsm.cmd_type = LTTNG_LIST_CHANNELS; | |
cac3069d | 1120 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1121 | sizeof(lsm.session.name)); |
9f19cc17 | 1122 | |
cac3069d | 1123 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1124 | |
cac3069d | 1125 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1126 | if (ret < 0) { |
1127 | return ret; | |
1128 | } | |
1129 | ||
1130 | return ret / sizeof(struct lttng_channel); | |
1131 | } | |
1132 | ||
1133 | /* | |
1c8d13c8 TD |
1134 | * Ask the session daemon for all available events of a session channel. |
1135 | * Sets the contents of the events array. | |
1136 | * Returns the number of lttng_event entries in events; | |
1137 | * on error, returns a negative value. | |
9f19cc17 | 1138 | */ |
cd80958d DG |
1139 | int lttng_list_events(struct lttng_handle *handle, |
1140 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1141 | { |
1142 | int ret; | |
cd80958d | 1143 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1144 | |
9d697d3d DG |
1145 | /* Safety check. An handle and channel name are mandatory */ |
1146 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1147 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1148 | } |
1149 | ||
1150 | lsm.cmd_type = LTTNG_LIST_EVENTS; | |
cac3069d | 1151 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1152 | sizeof(lsm.session.name)); |
cac3069d | 1153 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1154 | sizeof(lsm.u.list.channel_name)); |
1155 | ||
cac3069d | 1156 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1157 | |
cac3069d | 1158 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1159 | if (ret < 0) { |
1160 | return ret; | |
1161 | } | |
1162 | ||
1163 | return ret / sizeof(struct lttng_event); | |
1164 | } | |
1165 | ||
fac6795d | 1166 | /* |
1c8d13c8 TD |
1167 | * Sets the tracing_group variable with name. |
1168 | * This function allocates memory pointed to by tracing_group. | |
1169 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1170 | */ |
1171 | int lttng_set_tracing_group(const char *name) | |
1172 | { | |
9d697d3d | 1173 | if (name == NULL) { |
2f70b271 | 1174 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1175 | } |
1176 | ||
fac6795d | 1177 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1178 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1179 | } |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
d0254c7c | 1184 | /* |
af87c45a | 1185 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1186 | */ |
cd80958d | 1187 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1188 | struct lttng_calibrate *calibrate) |
1189 | { | |
cd80958d | 1190 | struct lttcomm_session_msg lsm; |
d0254c7c | 1191 | |
9d697d3d DG |
1192 | /* Safety check. NULL pointer are forbidden */ |
1193 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1194 | return -LTTNG_ERR_INVALID; |
cd80958d | 1195 | } |
d0254c7c | 1196 | |
cd80958d | 1197 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1198 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1199 | |
cd80958d DG |
1200 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1201 | ||
cac3069d | 1202 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1203 | } |
1204 | ||
5edd7e09 DG |
1205 | /* |
1206 | * Set default channel attributes. | |
441c16a7 | 1207 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1208 | */ |
1209 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1210 | struct lttng_channel_attr *attr) | |
1211 | { | |
1212 | /* Safety check */ | |
1213 | if (attr == NULL || domain == NULL) { | |
1214 | return; | |
1215 | } | |
1216 | ||
eacaa7a6 DS |
1217 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1218 | ||
0a9c6494 DG |
1219 | /* Same for all domains. */ |
1220 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1221 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1222 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1223 | ||
5edd7e09 DG |
1224 | switch (domain->type) { |
1225 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1226 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1227 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1228 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1229 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1230 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1231 | break; | |
1232 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1233 | switch (domain->buf_type) { |
1234 | case LTTNG_BUFFER_PER_UID: | |
1235 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1236 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1237 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1238 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1239 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1240 | break; | |
1241 | case LTTNG_BUFFER_PER_PID: | |
1242 | default: | |
1243 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1244 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1245 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1246 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1247 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1248 | break; | |
1249 | } | |
5edd7e09 | 1250 | default: |
441c16a7 | 1251 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1252 | break; |
1253 | } | |
1254 | } | |
1255 | ||
fac6795d | 1256 | /* |
2269e89e | 1257 | * Check if session daemon is alive. |
fac6795d | 1258 | * |
2269e89e | 1259 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1260 | * On error returns a negative value. |
fac6795d | 1261 | */ |
947308c4 | 1262 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1263 | { |
1264 | int ret; | |
1265 | ||
1266 | ret = set_session_daemon_path(); | |
1267 | if (ret < 0) { | |
947308c4 | 1268 | /* Error */ |
fac6795d DG |
1269 | return ret; |
1270 | } | |
1271 | ||
9d035200 | 1272 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1273 | /* |
1274 | * No socket path set. Weird error which means the constructor was not | |
1275 | * called. | |
1276 | */ | |
1277 | assert(0); | |
fac6795d DG |
1278 | } |
1279 | ||
2269e89e | 1280 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1281 | if (ret < 0) { |
1282 | /* Not alive */ | |
1283 | return 0; | |
1284 | } | |
7d8234d9 | 1285 | |
947308c4 DG |
1286 | /* Is alive */ |
1287 | return 1; | |
fac6795d DG |
1288 | } |
1289 | ||
00e2e675 | 1290 | /* |
a4b92340 | 1291 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1292 | * |
1293 | * Return 0 on success, else a negative value. | |
1294 | */ | |
a4b92340 DG |
1295 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1296 | const char *control_url, const char *data_url) | |
00e2e675 | 1297 | { |
3dd05a85 | 1298 | int ret; |
a4b92340 | 1299 | ssize_t size; |
00e2e675 | 1300 | struct lttcomm_session_msg lsm; |
a4b92340 | 1301 | struct lttng_uri *uris = NULL; |
00e2e675 | 1302 | |
a4b92340 | 1303 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1304 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1305 | } |
1306 | ||
a4b92340 DG |
1307 | memset(&lsm, 0, sizeof(lsm)); |
1308 | ||
00e2e675 DG |
1309 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1310 | ||
cac3069d | 1311 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1312 | sizeof(lsm.session.name)); |
cac3069d | 1313 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1314 | |
bc894455 | 1315 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1316 | if (size < 0) { |
2f70b271 | 1317 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1318 | } |
1319 | ||
1320 | lsm.u.uri.size = size; | |
00e2e675 | 1321 | |
cac3069d DG |
1322 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1323 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1324 | |
1325 | free(uris); | |
1326 | return ret; | |
00e2e675 DG |
1327 | } |
1328 | ||
1329 | /* | |
9c6bda17 | 1330 | * [OBSOLETE] |
00e2e675 DG |
1331 | */ |
1332 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1333 | { | |
785d2d0d | 1334 | return -ENOSYS; |
00e2e675 DG |
1335 | } |
1336 | ||
1337 | /* | |
9c6bda17 | 1338 | * [OBSOLETE] |
00e2e675 DG |
1339 | */ |
1340 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1341 | { | |
785d2d0d | 1342 | return -ENOSYS; |
00e2e675 DG |
1343 | } |
1344 | ||
44a5e5eb DG |
1345 | /* |
1346 | * Set health socket path by putting it in the global health_sock_path | |
1347 | * variable. | |
1348 | * | |
1349 | * Returns 0 on success or assert(0) on ENOMEM. | |
1350 | */ | |
1351 | static int set_health_socket_path(void) | |
1352 | { | |
44a5e5eb DG |
1353 | int in_tgroup = 0; /* In tracing group */ |
1354 | uid_t uid; | |
1355 | const char *home; | |
1356 | ||
1357 | uid = getuid(); | |
1358 | ||
1359 | if (uid != 0) { | |
1360 | /* Are we in the tracing group ? */ | |
1361 | in_tgroup = check_tracing_group(tracing_group); | |
1362 | } | |
1363 | ||
1364 | if ((uid == 0) || in_tgroup) { | |
cac3069d DG |
1365 | lttng_ctl_copy_string(health_sock_path, |
1366 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK, sizeof(health_sock_path)); | |
44a5e5eb DG |
1367 | } |
1368 | ||
1369 | if (uid != 0) { | |
c617c0c6 MD |
1370 | int ret; |
1371 | ||
44a5e5eb DG |
1372 | /* |
1373 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
1374 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
1375 | */ | |
feb0f3e5 | 1376 | home = utils_get_home_dir(); |
44a5e5eb DG |
1377 | if (home == NULL) { |
1378 | /* Fallback in /tmp .. */ | |
1379 | home = "/tmp"; | |
1380 | } | |
1381 | ||
1382 | ret = snprintf(health_sock_path, sizeof(health_sock_path), | |
1383 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home); | |
1384 | if ((ret < 0) || (ret >= sizeof(health_sock_path))) { | |
1385 | /* ENOMEM at this point... just kill the control lib. */ | |
1386 | assert(0); | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Check session daemon health for a specific health component. | |
1395 | * | |
2f70b271 | 1396 | * Return 0 if health is OK or else 1 if BAD. |
44a5e5eb | 1397 | * |
2f70b271 | 1398 | * Any other negative value is a lttng error code which can be translated with |
44a5e5eb DG |
1399 | * lttng_strerror(). |
1400 | */ | |
1401 | int lttng_health_check(enum lttng_health_component c) | |
1402 | { | |
1403 | int sock, ret; | |
1404 | struct lttcomm_health_msg msg; | |
1405 | struct lttcomm_health_data reply; | |
1406 | ||
1407 | /* Connect to the sesssion daemon */ | |
1408 | sock = lttcomm_connect_unix_sock(health_sock_path); | |
1409 | if (sock < 0) { | |
2f70b271 | 1410 | ret = -LTTNG_ERR_NO_SESSIOND; |
44a5e5eb DG |
1411 | goto error; |
1412 | } | |
1413 | ||
1414 | msg.cmd = LTTNG_HEALTH_CHECK; | |
1415 | msg.component = c; | |
1416 | ||
1417 | ret = lttcomm_send_unix_sock(sock, (void *)&msg, sizeof(msg)); | |
1418 | if (ret < 0) { | |
2f70b271 | 1419 | ret = -LTTNG_ERR_FATAL; |
44a5e5eb DG |
1420 | goto close_error; |
1421 | } | |
1422 | ||
1423 | ret = lttcomm_recv_unix_sock(sock, (void *)&reply, sizeof(reply)); | |
1424 | if (ret < 0) { | |
2f70b271 | 1425 | ret = -LTTNG_ERR_FATAL; |
44a5e5eb DG |
1426 | goto close_error; |
1427 | } | |
1428 | ||
1429 | ret = reply.ret_code; | |
1430 | ||
1431 | close_error: | |
67ef15b7 MD |
1432 | { |
1433 | int closeret; | |
1434 | ||
1435 | closeret = close(sock); | |
1436 | assert(!closeret); | |
1437 | } | |
44a5e5eb DG |
1438 | |
1439 | error: | |
1440 | return ret; | |
1441 | } | |
1442 | ||
07424f16 DG |
1443 | /* |
1444 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1445 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1446 | * the lttng client. | |
1447 | * | |
1448 | * We need the date and time for the trace path subdirectory for the case where | |
1449 | * the user does NOT define one using either -o or -U. Using the normal | |
1450 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1451 | * the URL was generated automatically by the client or define by the user. | |
1452 | * | |
1453 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1454 | * string and appends it if necessary to the URI subdirectory before sending it | |
1455 | * to the session daemon. | |
1456 | * | |
1457 | * With this extra function, the lttng_create_session call behavior is not | |
1458 | * changed and the timestamp is appended to the URI on the session daemon side | |
1459 | * if necessary. | |
1460 | */ | |
1461 | int _lttng_create_session_ext(const char *name, const char *url, | |
1462 | const char *datetime) | |
1463 | { | |
3dd05a85 | 1464 | int ret; |
07424f16 DG |
1465 | ssize_t size; |
1466 | struct lttcomm_session_msg lsm; | |
1467 | struct lttng_uri *uris = NULL; | |
1468 | ||
d0b96690 | 1469 | if (name == NULL || datetime == NULL || url == NULL) { |
2f70b271 | 1470 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1471 | } |
1472 | ||
1473 | memset(&lsm, 0, sizeof(lsm)); | |
1474 | ||
1475 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1476 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1477 | |
1478 | /* There should never be a data URL */ | |
bc894455 | 1479 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1480 | if (size < 0) { |
3dd05a85 DG |
1481 | ret = -LTTNG_ERR_INVALID; |
1482 | goto error; | |
07424f16 DG |
1483 | } |
1484 | ||
1485 | lsm.u.uri.size = size; | |
1486 | ||
4b35a6b3 | 1487 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1488 | /* Don't append datetime if the name was automatically created. */ |
1489 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1490 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1491 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1492 | name, datetime); | |
1493 | } else { | |
1494 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1495 | } | |
07424f16 DG |
1496 | if (ret < 0) { |
1497 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1498 | ret = -LTTNG_ERR_FATAL; |
1499 | goto error; | |
07424f16 DG |
1500 | } |
1501 | } | |
1502 | ||
cac3069d DG |
1503 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1504 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1505 | |
1506 | error: | |
1507 | free(uris); | |
1508 | return ret; | |
07424f16 DG |
1509 | } |
1510 | ||
806e2684 DG |
1511 | /* |
1512 | * For a given session name, this call checks if the data is ready to be read | |
1513 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1514 | * any readers. | |
1515 | */ | |
6d805429 | 1516 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1517 | { |
1518 | int ret; | |
1519 | struct lttcomm_session_msg lsm; | |
1520 | ||
1521 | if (session_name == NULL) { | |
1522 | return -LTTNG_ERR_INVALID; | |
1523 | } | |
1524 | ||
6d805429 | 1525 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1526 | |
cac3069d DG |
1527 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1528 | sizeof(lsm.session.name)); | |
806e2684 | 1529 | |
cac3069d | 1530 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
806e2684 DG |
1531 | |
1532 | /* | |
cac3069d DG |
1533 | * The lttng_ctl_ask_sessiond function negate the return code if it's not |
1534 | * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning | |
1535 | * that the data is available. Yes it is hackish but for now this is the | |
1536 | * only way. | |
806e2684 DG |
1537 | */ |
1538 | if (ret == -1) { | |
1539 | ret = 1; | |
1540 | } | |
1541 | ||
1542 | return ret; | |
1543 | } | |
1544 | ||
fac6795d DG |
1545 | /* |
1546 | * lib constructor | |
1547 | */ | |
1548 | static void __attribute__((constructor)) init() | |
1549 | { | |
1550 | /* Set default session group */ | |
bbccc3d2 | 1551 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
44a5e5eb DG |
1552 | /* Set socket for health check */ |
1553 | (void) set_health_socket_path(); | |
fac6795d | 1554 | } |
49cca668 DG |
1555 | |
1556 | /* | |
1557 | * lib destructor | |
1558 | */ | |
1559 | static void __attribute__((destructor)) lttng_ctl_exit() | |
1560 | { | |
1561 | free(tracing_group); | |
1562 | } |