Commit | Line | Data |
---|---|---|
0d37f2bc DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
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. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
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. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
6c1c0768 | 20 | #define _LGPL_SOURCE |
0d37f2bc DG |
21 | #include <assert.h> |
22 | #include <limits.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
28 | #include <unistd.h> | |
29 | #include <errno.h> | |
30 | ||
90e535ef | 31 | #include <common/common.h> |
0d37f2bc DG |
32 | |
33 | #include "unix.h" | |
34 | ||
35 | /* | |
36 | * Connect to unix socket using the path name. | |
37 | */ | |
90e535ef | 38 | LTTNG_HIDDEN |
0d37f2bc DG |
39 | int lttcomm_connect_unix_sock(const char *pathname) |
40 | { | |
41 | struct sockaddr_un sun; | |
42 | int fd, ret, closeret; | |
43 | ||
0a09ade8 JG |
44 | if (strlen(pathname) >= sizeof(sun.sun_path)) { |
45 | ERR("unix socket address (\"%s\") is longer than the platform's limit (%zu > %zu).", | |
46 | pathname, strlen(pathname) + 1, | |
47 | sizeof(sun.sun_path)); | |
48 | ret = -ENAMETOOLONG; | |
49 | goto error; | |
50 | } | |
51 | ||
0d37f2bc DG |
52 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
53 | if (fd < 0) { | |
54 | PERROR("socket"); | |
55 | ret = fd; | |
56 | goto error; | |
57 | } | |
58 | ||
59 | memset(&sun, 0, sizeof(sun)); | |
60 | sun.sun_family = AF_UNIX; | |
61 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
62 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
63 | ||
64 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
65 | if (ret < 0) { | |
66 | /* | |
67 | * Don't print message on connect error, because connect is used in | |
68 | * normal execution to detect if sessiond is alive. | |
69 | */ | |
70 | goto error_connect; | |
71 | } | |
72 | ||
73 | return fd; | |
74 | ||
75 | error_connect: | |
76 | closeret = close(fd); | |
77 | if (closeret) { | |
78 | PERROR("close"); | |
79 | } | |
80 | error: | |
81 | return ret; | |
82 | } | |
83 | ||
84 | /* | |
85 | * Do an accept(2) on the sock and return the new file descriptor. The socket | |
86 | * MUST be bind(2) before. | |
87 | */ | |
90e535ef | 88 | LTTNG_HIDDEN |
0d37f2bc DG |
89 | int lttcomm_accept_unix_sock(int sock) |
90 | { | |
91 | int new_fd; | |
92 | struct sockaddr_un sun; | |
93 | socklen_t len = 0; | |
94 | ||
95 | /* Blocking call */ | |
96 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
97 | if (new_fd < 0) { | |
98 | PERROR("accept"); | |
99 | } | |
100 | ||
101 | return new_fd; | |
102 | } | |
103 | ||
0e904f3e MD |
104 | LTTNG_HIDDEN |
105 | int lttcomm_create_anon_unix_socketpair(int *fds) | |
106 | { | |
107 | if (socketpair(PF_UNIX, SOCK_STREAM, 0, fds) < 0) { | |
108 | PERROR("socketpair"); | |
109 | return -1; | |
110 | } | |
111 | return 0; | |
112 | } | |
113 | ||
0d37f2bc DG |
114 | /* |
115 | * Creates a AF_UNIX local socket using pathname bind the socket upon creation | |
116 | * and return the fd. | |
117 | */ | |
90e535ef | 118 | LTTNG_HIDDEN |
0d37f2bc DG |
119 | int lttcomm_create_unix_sock(const char *pathname) |
120 | { | |
121 | struct sockaddr_un sun; | |
0a09ade8 | 122 | int fd = -1; |
0d37f2bc DG |
123 | int ret = -1; |
124 | ||
0a09ade8 JG |
125 | if (strlen(pathname) >= sizeof(sun.sun_path)) { |
126 | ERR("unix socket address (\"%s\") is longer than the platform's limit (%zu > %zu).", | |
127 | pathname, strlen(pathname) + 1, | |
128 | sizeof(sun.sun_path)); | |
129 | ret = -ENAMETOOLONG; | |
130 | goto error; | |
131 | } | |
132 | ||
0d37f2bc DG |
133 | /* Create server socket */ |
134 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
135 | PERROR("socket"); | |
136 | goto error; | |
137 | } | |
138 | ||
139 | memset(&sun, 0, sizeof(sun)); | |
140 | sun.sun_family = AF_UNIX; | |
141 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
142 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
143 | ||
144 | /* Unlink the old file if present */ | |
145 | (void) unlink(pathname); | |
146 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
147 | if (ret < 0) { | |
148 | PERROR("bind"); | |
149 | goto error; | |
150 | } | |
151 | ||
152 | return fd; | |
153 | ||
154 | error: | |
17e75273 DG |
155 | if (fd >= 0) { |
156 | if (close(fd) < 0) { | |
157 | PERROR("close create unix sock"); | |
158 | } | |
159 | } | |
0d37f2bc DG |
160 | return ret; |
161 | } | |
162 | ||
163 | /* | |
164 | * Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN. | |
165 | */ | |
90e535ef | 166 | LTTNG_HIDDEN |
0d37f2bc DG |
167 | int lttcomm_listen_unix_sock(int sock) |
168 | { | |
169 | int ret; | |
170 | ||
171 | ret = listen(sock, LTTNG_SESSIOND_COMM_MAX_LISTEN); | |
172 | if (ret < 0) { | |
173 | PERROR("listen"); | |
174 | } | |
175 | ||
176 | return ret; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Receive data of size len in put that data into the buf param. Using recvmsg | |
181 | * API. | |
182 | * | |
183 | * Return the size of received data. | |
184 | */ | |
90e535ef | 185 | LTTNG_HIDDEN |
0d37f2bc DG |
186 | ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len) |
187 | { | |
188 | struct msghdr msg; | |
189 | struct iovec iov[1]; | |
190 | ssize_t ret = -1; | |
7c5aef62 | 191 | size_t len_last; |
0d37f2bc DG |
192 | |
193 | memset(&msg, 0, sizeof(msg)); | |
194 | ||
195 | iov[0].iov_base = buf; | |
196 | iov[0].iov_len = len; | |
197 | msg.msg_iov = iov; | |
198 | msg.msg_iovlen = 1; | |
199 | ||
200 | do { | |
7c5aef62 | 201 | len_last = iov[0].iov_len; |
b51ae080 | 202 | ret = recvmsg(sock, &msg, MSG_NOSIGNAL); |
7c5aef62 DG |
203 | if (ret > 0) { |
204 | iov[0].iov_base += ret; | |
205 | iov[0].iov_len -= ret; | |
206 | assert(ret <= len_last); | |
207 | } | |
208 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
0d37f2bc DG |
209 | if (ret < 0) { |
210 | PERROR("recvmsg"); | |
7c5aef62 DG |
211 | } else if (ret > 0) { |
212 | ret = len; | |
0d37f2bc | 213 | } |
7c5aef62 | 214 | /* Else ret = 0 meaning an orderly shutdown. */ |
0d37f2bc DG |
215 | |
216 | return ret; | |
217 | } | |
218 | ||
219 | /* | |
220 | * Send buf data of size len. Using sendmsg API. | |
221 | * | |
222 | * Return the size of sent data. | |
223 | */ | |
90e535ef | 224 | LTTNG_HIDDEN |
0d37f2bc DG |
225 | ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len) |
226 | { | |
227 | struct msghdr msg; | |
228 | struct iovec iov[1]; | |
229 | ssize_t ret = -1; | |
230 | ||
231 | memset(&msg, 0, sizeof(msg)); | |
232 | ||
233 | iov[0].iov_base = buf; | |
234 | iov[0].iov_len = len; | |
235 | msg.msg_iov = iov; | |
236 | msg.msg_iovlen = 1; | |
237 | ||
238 | ret = sendmsg(sock, &msg, 0); | |
239 | if (ret < 0) { | |
240 | /* | |
241 | * Only warn about EPIPE when quiet mode is deactivated. | |
242 | * We consider EPIPE as expected. | |
243 | */ | |
244 | if (errno != EPIPE || !lttng_opt_quiet) { | |
245 | PERROR("sendmsg"); | |
246 | } | |
247 | } | |
248 | ||
249 | return ret; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Shutdown cleanly a unix socket. | |
254 | */ | |
90e535ef | 255 | LTTNG_HIDDEN |
0d37f2bc DG |
256 | int lttcomm_close_unix_sock(int sock) |
257 | { | |
258 | int ret, closeret; | |
259 | ||
260 | /* Shutdown receptions and transmissions */ | |
261 | ret = shutdown(sock, SHUT_RDWR); | |
262 | if (ret < 0) { | |
263 | PERROR("shutdown"); | |
264 | } | |
265 | ||
266 | closeret = close(sock); | |
267 | if (closeret) { | |
268 | PERROR("close"); | |
269 | } | |
270 | ||
271 | return ret; | |
272 | } | |
273 | ||
274 | /* | |
275 | * Send a message accompanied by fd(s) over a unix socket. | |
276 | * | |
277 | * Returns the size of data sent, or negative error value. | |
278 | */ | |
90e535ef | 279 | LTTNG_HIDDEN |
0d37f2bc DG |
280 | ssize_t lttcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
281 | { | |
282 | struct msghdr msg; | |
283 | struct cmsghdr *cmptr; | |
284 | struct iovec iov[1]; | |
285 | ssize_t ret = -1; | |
286 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
287 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
288 | char dummy = 0; | |
289 | ||
290 | memset(&msg, 0, sizeof(msg)); | |
c617c0c6 | 291 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
0d37f2bc DG |
292 | |
293 | if (nb_fd > LTTCOMM_MAX_SEND_FDS) | |
294 | return -EINVAL; | |
295 | ||
296 | msg.msg_control = (caddr_t)tmp; | |
297 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
298 | ||
299 | cmptr = CMSG_FIRSTHDR(&msg); | |
ce0fc06f MJ |
300 | if (!cmptr) { |
301 | return -1; | |
302 | } | |
0d37f2bc DG |
303 | cmptr->cmsg_level = SOL_SOCKET; |
304 | cmptr->cmsg_type = SCM_RIGHTS; | |
305 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
306 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
307 | /* Sum of the length of all control messages in the buffer: */ | |
308 | msg.msg_controllen = cmptr->cmsg_len; | |
309 | ||
310 | iov[0].iov_base = &dummy; | |
311 | iov[0].iov_len = 1; | |
312 | msg.msg_iov = iov; | |
313 | msg.msg_iovlen = 1; | |
314 | ||
315 | do { | |
316 | ret = sendmsg(sock, &msg, 0); | |
317 | } while (ret < 0 && errno == EINTR); | |
318 | if (ret < 0) { | |
319 | /* | |
320 | * Only warn about EPIPE when quiet mode is deactivated. | |
321 | * We consider EPIPE as expected. | |
322 | */ | |
323 | if (errno != EPIPE || !lttng_opt_quiet) { | |
324 | PERROR("sendmsg"); | |
325 | } | |
326 | } | |
327 | return ret; | |
328 | } | |
329 | ||
330 | /* | |
331 | * Recv a message accompanied by fd(s) from a unix socket. | |
332 | * | |
333 | * Returns the size of received data, or negative error value. | |
334 | * | |
335 | * Expect at most "nb_fd" file descriptors. Returns the number of fd | |
336 | * actually received in nb_fd. | |
337 | */ | |
90e535ef | 338 | LTTNG_HIDDEN |
0d37f2bc DG |
339 | ssize_t lttcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
340 | { | |
341 | struct iovec iov[1]; | |
342 | ssize_t ret = 0; | |
343 | struct cmsghdr *cmsg; | |
344 | size_t sizeof_fds = nb_fd * sizeof(int); | |
345 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
346 | struct msghdr msg; | |
347 | char dummy; | |
348 | ||
349 | memset(&msg, 0, sizeof(msg)); | |
350 | ||
351 | /* Prepare to receive the structures */ | |
352 | iov[0].iov_base = &dummy; | |
353 | iov[0].iov_len = 1; | |
354 | msg.msg_iov = iov; | |
355 | msg.msg_iovlen = 1; | |
356 | msg.msg_control = recv_fd; | |
357 | msg.msg_controllen = sizeof(recv_fd); | |
358 | ||
359 | do { | |
360 | ret = recvmsg(sock, &msg, 0); | |
361 | } while (ret < 0 && errno == EINTR); | |
362 | if (ret < 0) { | |
363 | PERROR("recvmsg fds"); | |
364 | goto end; | |
365 | } | |
366 | if (ret != 1) { | |
367 | fprintf(stderr, "Error: Received %zd bytes, expected %d\n", | |
368 | ret, 1); | |
369 | goto end; | |
370 | } | |
371 | if (msg.msg_flags & MSG_CTRUNC) { | |
372 | fprintf(stderr, "Error: Control message truncated.\n"); | |
373 | ret = -1; | |
374 | goto end; | |
375 | } | |
376 | cmsg = CMSG_FIRSTHDR(&msg); | |
377 | if (!cmsg) { | |
378 | fprintf(stderr, "Error: Invalid control message header\n"); | |
379 | ret = -1; | |
380 | goto end; | |
381 | } | |
382 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
383 | fprintf(stderr, "Didn't received any fd\n"); | |
384 | ret = -1; | |
385 | goto end; | |
386 | } | |
387 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
388 | fprintf(stderr, "Error: Received %zu bytes of ancillary data, expected %zu\n", | |
389 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); | |
390 | ret = -1; | |
391 | goto end; | |
392 | } | |
393 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); | |
394 | ret = sizeof_fds; | |
395 | end: | |
396 | return ret; | |
397 | } | |
398 | ||
399 | /* | |
400 | * Send a message with credentials over a unix socket. | |
401 | * | |
402 | * Returns the size of data sent, or negative error value. | |
403 | */ | |
90e535ef | 404 | LTTNG_HIDDEN |
0d37f2bc DG |
405 | ssize_t lttcomm_send_creds_unix_sock(int sock, void *buf, size_t len) |
406 | { | |
407 | struct msghdr msg; | |
408 | struct iovec iov[1]; | |
409 | ssize_t ret = -1; | |
410 | #ifdef __linux__ | |
411 | struct cmsghdr *cmptr; | |
412 | size_t sizeof_cred = sizeof(lttng_sock_cred); | |
413 | char anc_buf[CMSG_SPACE(sizeof_cred)]; | |
414 | lttng_sock_cred *creds; | |
415 | #endif /* __linux__ */ | |
416 | ||
417 | memset(&msg, 0, sizeof(msg)); | |
c617c0c6 | 418 | memset(anc_buf, 0, CMSG_SPACE(sizeof_cred) * sizeof(char)); |
0d37f2bc DG |
419 | |
420 | iov[0].iov_base = buf; | |
421 | iov[0].iov_len = len; | |
422 | msg.msg_iov = iov; | |
423 | msg.msg_iovlen = 1; | |
424 | ||
425 | #ifdef __linux__ | |
426 | msg.msg_control = (caddr_t) anc_buf; | |
427 | msg.msg_controllen = CMSG_LEN(sizeof_cred); | |
428 | ||
429 | cmptr = CMSG_FIRSTHDR(&msg); | |
ce0fc06f MJ |
430 | if (!cmptr) { |
431 | return -1; | |
432 | } | |
0d37f2bc DG |
433 | cmptr->cmsg_level = SOL_SOCKET; |
434 | cmptr->cmsg_type = LTTNG_SOCK_CREDS; | |
435 | cmptr->cmsg_len = CMSG_LEN(sizeof_cred); | |
436 | ||
437 | creds = (lttng_sock_cred*) CMSG_DATA(cmptr); | |
438 | ||
439 | LTTNG_SOCK_SET_UID_CRED(creds, geteuid()); | |
440 | LTTNG_SOCK_SET_GID_CRED(creds, getegid()); | |
441 | LTTNG_SOCK_SET_PID_CRED(creds, getpid()); | |
442 | #endif /* __linux__ */ | |
443 | ||
444 | do { | |
445 | ret = sendmsg(sock, &msg, 0); | |
446 | } while (ret < 0 && errno == EINTR); | |
447 | if (ret < 0) { | |
448 | /* | |
449 | * Only warn about EPIPE when quiet mode is deactivated. | |
450 | * We consider EPIPE as expected. | |
451 | */ | |
452 | if (errno != EPIPE || !lttng_opt_quiet) { | |
453 | PERROR("sendmsg"); | |
454 | } | |
455 | } | |
456 | return ret; | |
457 | } | |
458 | ||
459 | /* | |
460 | * Recv a message accompanied with credentials from a unix socket. | |
461 | * | |
462 | * Returns the size of received data, or negative error value. | |
463 | */ | |
90e535ef | 464 | LTTNG_HIDDEN |
0d37f2bc DG |
465 | ssize_t lttcomm_recv_creds_unix_sock(int sock, void *buf, size_t len, |
466 | lttng_sock_cred *creds) | |
467 | { | |
468 | struct msghdr msg; | |
469 | struct iovec iov[1]; | |
470 | ssize_t ret; | |
4100e49a | 471 | size_t len_last; |
0d37f2bc DG |
472 | #ifdef __linux__ |
473 | struct cmsghdr *cmptr; | |
474 | size_t sizeof_cred = sizeof(lttng_sock_cred); | |
475 | char anc_buf[CMSG_SPACE(sizeof_cred)]; | |
476 | #endif /* __linux__ */ | |
477 | ||
478 | memset(&msg, 0, sizeof(msg)); | |
479 | ||
480 | /* Not allowed */ | |
481 | if (creds == NULL) { | |
482 | ret = -1; | |
483 | goto end; | |
484 | } | |
485 | ||
486 | /* Prepare to receive the structures */ | |
487 | iov[0].iov_base = buf; | |
488 | iov[0].iov_len = len; | |
489 | msg.msg_iov = iov; | |
490 | msg.msg_iovlen = 1; | |
491 | ||
492 | #ifdef __linux__ | |
493 | msg.msg_control = anc_buf; | |
494 | msg.msg_controllen = sizeof(anc_buf); | |
495 | #endif /* __linux__ */ | |
496 | ||
497 | do { | |
4100e49a | 498 | len_last = iov[0].iov_len; |
0d37f2bc | 499 | ret = recvmsg(sock, &msg, 0); |
4100e49a DG |
500 | if (ret > 0) { |
501 | iov[0].iov_base += ret; | |
502 | iov[0].iov_len -= ret; | |
503 | assert(ret <= len_last); | |
504 | } | |
505 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
0d37f2bc DG |
506 | if (ret < 0) { |
507 | PERROR("recvmsg fds"); | |
508 | goto end; | |
4100e49a DG |
509 | } else if (ret > 0) { |
510 | ret = len; | |
0d37f2bc | 511 | } |
4100e49a | 512 | /* Else ret = 0 meaning an orderly shutdown. */ |
0d37f2bc DG |
513 | |
514 | #ifdef __linux__ | |
515 | if (msg.msg_flags & MSG_CTRUNC) { | |
516 | fprintf(stderr, "Error: Control message truncated.\n"); | |
517 | ret = -1; | |
518 | goto end; | |
519 | } | |
520 | ||
521 | cmptr = CMSG_FIRSTHDR(&msg); | |
522 | if (cmptr == NULL) { | |
523 | fprintf(stderr, "Error: Invalid control message header\n"); | |
524 | ret = -1; | |
525 | goto end; | |
526 | } | |
527 | ||
528 | if (cmptr->cmsg_level != SOL_SOCKET || | |
529 | cmptr->cmsg_type != LTTNG_SOCK_CREDS) { | |
530 | fprintf(stderr, "Didn't received any credentials\n"); | |
531 | ret = -1; | |
532 | goto end; | |
533 | } | |
534 | ||
535 | if (cmptr->cmsg_len != CMSG_LEN(sizeof_cred)) { | |
536 | fprintf(stderr, "Error: Received %zu bytes of ancillary data, expected %zu\n", | |
537 | (size_t) cmptr->cmsg_len, (size_t) CMSG_LEN(sizeof_cred)); | |
538 | ret = -1; | |
539 | goto end; | |
540 | } | |
541 | ||
542 | memcpy(creds, CMSG_DATA(cmptr), sizeof_cred); | |
543 | #elif (defined(__FreeBSD__) || defined(__CYGWIN__)) | |
544 | { | |
545 | int peer_ret; | |
546 | ||
547 | peer_ret = getpeereid(sock, &creds->uid, &creds->gid); | |
548 | if (peer_ret != 0) { | |
549 | return peer_ret; | |
550 | } | |
551 | } | |
552 | #else | |
553 | #error "Please implement credential support for your OS." | |
554 | #endif /* __linux__ */ | |
555 | ||
556 | end: | |
557 | return ret; | |
558 | } | |
559 | ||
560 | /* | |
561 | * Set socket option to use credentials passing. | |
562 | */ | |
563 | #ifdef __linux__ | |
90e535ef | 564 | LTTNG_HIDDEN |
0d37f2bc DG |
565 | int lttcomm_setsockopt_creds_unix_sock(int sock) |
566 | { | |
567 | int ret, on = 1; | |
568 | ||
569 | /* Set socket for credentials retrieval */ | |
570 | ret = setsockopt(sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)); | |
571 | if (ret < 0) { | |
572 | PERROR("setsockopt creds unix sock"); | |
573 | } | |
574 | return ret; | |
575 | } | |
576 | #elif (defined(__FreeBSD__) || defined(__CYGWIN__)) | |
90e535ef | 577 | LTTNG_HIDDEN |
0d37f2bc DG |
578 | int lttcomm_setsockopt_creds_unix_sock(int sock) |
579 | { | |
580 | return 0; | |
581 | } | |
582 | #else | |
583 | #error "Please implement credential support for your OS." | |
584 | #endif /* __linux__ */ |