Commit | Line | Data |
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3bd1e081 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
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. | |
3bd1e081 MD |
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. | |
3bd1e081 MD |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <assert.h> | |
f02e1e8a | 21 | #include <lttng/ust-ctl.h> |
3bd1e081 MD |
22 | #include <poll.h> |
23 | #include <pthread.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/mman.h> | |
27 | #include <sys/socket.h> | |
dbb5dfe6 | 28 | #include <sys/stat.h> |
3bd1e081 | 29 | #include <sys/types.h> |
77c7c900 | 30 | #include <inttypes.h> |
3bd1e081 | 31 | #include <unistd.h> |
0857097f | 32 | |
990570ed | 33 | #include <common/common.h> |
10a8a223 | 34 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 35 | #include <common/relayd/relayd.h> |
dbb5dfe6 | 36 | #include <common/compat/fcntl.h> |
10a8a223 DG |
37 | |
38 | #include "ust-consumer.h" | |
3bd1e081 MD |
39 | |
40 | extern struct lttng_consumer_global_data consumer_data; | |
41 | extern int consumer_poll_timeout; | |
42 | extern volatile int consumer_quit; | |
43 | ||
44 | /* | |
f02e1e8a DG |
45 | * Wrapper over the mmap() read offset from ust-ctl library. Since this can be |
46 | * compiled out, we isolate it in this library. | |
3bd1e081 | 47 | */ |
f02e1e8a DG |
48 | int lttng_ustctl_get_mmap_read_offset(struct lttng_ust_shm_handle *handle, |
49 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *off) | |
3bd1e081 | 50 | { |
f02e1e8a DG |
51 | return ustctl_get_mmap_read_offset(handle, buf, off); |
52 | }; | |
3bd1e081 MD |
53 | |
54 | /* | |
55 | * Take a snapshot for a specific fd | |
56 | * | |
57 | * Returns 0 on success, < 0 on error | |
58 | */ | |
59 | int lttng_ustconsumer_take_snapshot(struct lttng_consumer_local_data *ctx, | |
60 | struct lttng_consumer_stream *stream) | |
61 | { | |
62 | int ret = 0; | |
63 | ||
64 | ret = ustctl_snapshot(stream->chan->handle, stream->buf); | |
65 | if (ret != 0) { | |
87dc6a9c | 66 | errno = -ret; |
4c462e79 | 67 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
68 | } |
69 | ||
70 | return ret; | |
71 | } | |
72 | ||
73 | /* | |
74 | * Get the produced position | |
75 | * | |
76 | * Returns 0 on success, < 0 on error | |
77 | */ | |
78 | int lttng_ustconsumer_get_produced_snapshot( | |
79 | struct lttng_consumer_local_data *ctx, | |
80 | struct lttng_consumer_stream *stream, | |
81 | unsigned long *pos) | |
82 | { | |
83 | int ret; | |
84 | ||
85 | ret = ustctl_snapshot_get_produced(stream->chan->handle, | |
86 | stream->buf, pos); | |
87 | if (ret != 0) { | |
87dc6a9c | 88 | errno = -ret; |
4c462e79 | 89 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
90 | } |
91 | ||
92 | return ret; | |
93 | } | |
94 | ||
95 | int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, | |
96 | int sock, struct pollfd *consumer_sockpoll) | |
97 | { | |
98 | ssize_t ret; | |
99 | struct lttcomm_consumer_msg msg; | |
100 | ||
101 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
102 | if (ret != sizeof(msg)) { | |
173af62f DG |
103 | DBG("Consumer received unexpected message size %zd (expects %zu)", |
104 | ret, sizeof(msg)); | |
3bd1e081 MD |
105 | lttng_consumer_send_error(ctx, CONSUMERD_ERROR_RECV_FD); |
106 | return ret; | |
107 | } | |
108 | if (msg.cmd_type == LTTNG_CONSUMER_STOP) { | |
109 | return -ENOENT; | |
110 | } | |
111 | ||
3f8e211f | 112 | /* relayd needs RCU read-side lock */ |
b0b335c8 MD |
113 | rcu_read_lock(); |
114 | ||
3bd1e081 | 115 | switch (msg.cmd_type) { |
00e2e675 DG |
116 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
117 | { | |
118 | int fd; | |
119 | struct consumer_relayd_sock_pair *relayd; | |
120 | ||
121 | DBG("UST Consumer adding relayd socket"); | |
122 | ||
123 | /* Get relayd reference if exists. */ | |
124 | relayd = consumer_find_relayd(msg.u.relayd_sock.net_index); | |
125 | if (relayd == NULL) { | |
126 | /* Not found. Allocate one. */ | |
127 | relayd = consumer_allocate_relayd_sock_pair( | |
128 | msg.u.relayd_sock.net_index); | |
129 | if (relayd == NULL) { | |
130 | lttng_consumer_send_error(ctx, CONSUMERD_OUTFD_ERROR); | |
131 | goto end_nosignal; | |
132 | } | |
133 | } | |
134 | ||
135 | /* Poll on consumer socket. */ | |
136 | if (lttng_consumer_poll_socket(consumer_sockpoll) < 0) { | |
3f8e211f | 137 | rcu_read_unlock(); |
00e2e675 DG |
138 | return -EINTR; |
139 | } | |
140 | ||
141 | /* Get relayd socket from session daemon */ | |
142 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); | |
143 | if (ret != sizeof(fd)) { | |
144 | lttng_consumer_send_error(ctx, CONSUMERD_ERROR_RECV_FD); | |
145 | goto end_nosignal; | |
146 | } | |
147 | ||
148 | /* Copy socket information and received FD */ | |
149 | switch (msg.u.relayd_sock.type) { | |
150 | case LTTNG_STREAM_CONTROL: | |
151 | /* Copy received lttcomm socket */ | |
152 | lttcomm_copy_sock(&relayd->control_sock, &msg.u.relayd_sock.sock); | |
153 | ret = lttcomm_create_sock(&relayd->control_sock); | |
154 | if (ret < 0) { | |
155 | goto end_nosignal; | |
156 | } | |
157 | ||
158 | /* Close the created socket fd which is useless */ | |
159 | close(relayd->control_sock.fd); | |
160 | ||
161 | /* Assign new file descriptor */ | |
162 | relayd->control_sock.fd = fd; | |
163 | break; | |
164 | case LTTNG_STREAM_DATA: | |
165 | /* Copy received lttcomm socket */ | |
166 | lttcomm_copy_sock(&relayd->data_sock, &msg.u.relayd_sock.sock); | |
167 | ret = lttcomm_create_sock(&relayd->data_sock); | |
168 | if (ret < 0) { | |
169 | goto end_nosignal; | |
170 | } | |
171 | ||
172 | /* Close the created socket fd which is useless */ | |
173 | close(relayd->data_sock.fd); | |
174 | ||
175 | /* Assign new file descriptor */ | |
176 | relayd->data_sock.fd = fd; | |
177 | break; | |
178 | default: | |
179 | ERR("Unknown relayd socket type"); | |
180 | goto end_nosignal; | |
181 | } | |
182 | ||
183 | DBG("Consumer %s socket created successfully with net idx %d (fd: %d)", | |
184 | msg.u.relayd_sock.type == LTTNG_STREAM_CONTROL ? "control" : "data", | |
185 | relayd->net_seq_idx, fd); | |
186 | ||
187 | /* | |
188 | * Add relayd socket pair to consumer data hashtable. If object already | |
189 | * exists or on error, the function gracefully returns. | |
190 | */ | |
191 | consumer_add_relayd(relayd); | |
192 | ||
193 | goto end_nosignal; | |
194 | } | |
3bd1e081 MD |
195 | case LTTNG_CONSUMER_ADD_CHANNEL: |
196 | { | |
197 | struct lttng_consumer_channel *new_channel; | |
198 | int fds[1]; | |
199 | size_t nb_fd = 1; | |
200 | ||
173af62f DG |
201 | DBG("UST Consumer adding channel"); |
202 | ||
3bd1e081 MD |
203 | /* block */ |
204 | if (lttng_consumer_poll_socket(consumer_sockpoll) < 0) { | |
3f8e211f | 205 | rcu_read_unlock(); |
3bd1e081 MD |
206 | return -EINTR; |
207 | } | |
208 | ret = lttcomm_recv_fds_unix_sock(sock, fds, nb_fd); | |
209 | if (ret != sizeof(fds)) { | |
210 | lttng_consumer_send_error(ctx, CONSUMERD_ERROR_RECV_FD); | |
3f8e211f | 211 | rcu_read_unlock(); |
3bd1e081 MD |
212 | return ret; |
213 | } | |
214 | ||
215 | DBG("consumer_add_channel %d", msg.u.channel.channel_key); | |
216 | ||
217 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, | |
218 | fds[0], -1, | |
219 | msg.u.channel.mmap_len, | |
220 | msg.u.channel.max_sb_size); | |
221 | if (new_channel == NULL) { | |
222 | lttng_consumer_send_error(ctx, CONSUMERD_OUTFD_ERROR); | |
223 | goto end_nosignal; | |
224 | } | |
225 | if (ctx->on_recv_channel != NULL) { | |
226 | ret = ctx->on_recv_channel(new_channel); | |
227 | if (ret == 0) { | |
228 | consumer_add_channel(new_channel); | |
229 | } else if (ret < 0) { | |
230 | goto end_nosignal; | |
231 | } | |
232 | } else { | |
233 | consumer_add_channel(new_channel); | |
234 | } | |
235 | goto end_nosignal; | |
236 | } | |
237 | case LTTNG_CONSUMER_ADD_STREAM: | |
238 | { | |
239 | struct lttng_consumer_stream *new_stream; | |
240 | int fds[2]; | |
241 | size_t nb_fd = 2; | |
00e2e675 | 242 | struct consumer_relayd_sock_pair *relayd = NULL; |
3bd1e081 | 243 | |
173af62f DG |
244 | DBG("UST Consumer adding stream"); |
245 | ||
3bd1e081 MD |
246 | /* block */ |
247 | if (lttng_consumer_poll_socket(consumer_sockpoll) < 0) { | |
3f8e211f | 248 | rcu_read_unlock(); |
3bd1e081 MD |
249 | return -EINTR; |
250 | } | |
251 | ret = lttcomm_recv_fds_unix_sock(sock, fds, nb_fd); | |
252 | if (ret != sizeof(fds)) { | |
253 | lttng_consumer_send_error(ctx, CONSUMERD_ERROR_RECV_FD); | |
3f8e211f | 254 | rcu_read_unlock(); |
3bd1e081 MD |
255 | return ret; |
256 | } | |
257 | ||
173af62f DG |
258 | DBG("consumer_add_stream chan %d stream %d", |
259 | msg.u.stream.channel_key, | |
260 | msg.u.stream.stream_key); | |
261 | ||
d41f73b7 | 262 | assert(msg.u.stream.output == LTTNG_EVENT_MMAP); |
173af62f | 263 | new_stream = consumer_allocate_stream(msg.u.stream.channel_key, |
3bd1e081 MD |
264 | msg.u.stream.stream_key, |
265 | fds[0], fds[1], | |
266 | msg.u.stream.state, | |
267 | msg.u.stream.mmap_len, | |
268 | msg.u.stream.output, | |
6df2e2c9 MD |
269 | msg.u.stream.path_name, |
270 | msg.u.stream.uid, | |
00e2e675 DG |
271 | msg.u.stream.gid, |
272 | msg.u.stream.net_index, | |
273 | msg.u.stream.metadata_flag); | |
3bd1e081 MD |
274 | if (new_stream == NULL) { |
275 | lttng_consumer_send_error(ctx, CONSUMERD_OUTFD_ERROR); | |
3f8e211f | 276 | goto end_nosignal; |
3bd1e081 | 277 | } |
00e2e675 DG |
278 | |
279 | /* The stream is not metadata. Get relayd reference if exists. */ | |
280 | relayd = consumer_find_relayd(msg.u.stream.net_index); | |
281 | if (relayd != NULL) { | |
282 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
283 | /* Add stream on the relayd */ | |
284 | ret = relayd_add_stream(&relayd->control_sock, | |
285 | msg.u.stream.name, msg.u.stream.path_name, | |
286 | &new_stream->relayd_stream_id); | |
287 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
288 | if (ret < 0) { | |
3f8e211f | 289 | goto end_nosignal; |
00e2e675 DG |
290 | } |
291 | } else if (msg.u.stream.net_index != -1) { | |
292 | ERR("Network sequence index %d unknown. Not adding stream.", | |
293 | msg.u.stream.net_index); | |
294 | free(new_stream); | |
3f8e211f | 295 | goto end_nosignal; |
00e2e675 DG |
296 | } |
297 | ||
3bd1e081 MD |
298 | if (ctx->on_recv_stream != NULL) { |
299 | ret = ctx->on_recv_stream(new_stream); | |
300 | if (ret == 0) { | |
301 | consumer_add_stream(new_stream); | |
302 | } else if (ret < 0) { | |
3f8e211f | 303 | goto end_nosignal; |
3bd1e081 MD |
304 | } |
305 | } else { | |
306 | consumer_add_stream(new_stream); | |
307 | } | |
00e2e675 | 308 | |
77c7c900 | 309 | DBG("UST consumer_add_stream %s (%d,%d) with relayd id %" PRIu64, |
00e2e675 DG |
310 | msg.u.stream.path_name, fds[0], fds[1], |
311 | new_stream->relayd_stream_id); | |
3bd1e081 MD |
312 | break; |
313 | } | |
173af62f DG |
314 | case LTTNG_CONSUMER_DESTROY_RELAYD: |
315 | { | |
316 | struct consumer_relayd_sock_pair *relayd; | |
317 | ||
77c7c900 | 318 | DBG("UST consumer destroying relayd %" PRIu64, |
173af62f DG |
319 | msg.u.destroy_relayd.net_seq_idx); |
320 | ||
321 | /* Get relayd reference if exists. */ | |
322 | relayd = consumer_find_relayd(msg.u.destroy_relayd.net_seq_idx); | |
323 | if (relayd == NULL) { | |
77c7c900 | 324 | ERR("Unable to find relayd %" PRIu64, msg.u.destroy_relayd.net_seq_idx); |
3f8e211f | 325 | goto end_nosignal; |
173af62f DG |
326 | } |
327 | ||
328 | /* Set destroy flag for this object */ | |
329 | uatomic_set(&relayd->destroy_flag, 1); | |
330 | ||
331 | /* Destroy the relayd if refcount is 0 else set the destroy flag. */ | |
332 | if (uatomic_read(&relayd->refcount) == 0) { | |
333 | consumer_destroy_relayd(relayd); | |
334 | } | |
3f8e211f | 335 | goto end_nosignal; |
173af62f | 336 | } |
3bd1e081 MD |
337 | case LTTNG_CONSUMER_UPDATE_STREAM: |
338 | { | |
3f8e211f | 339 | rcu_read_unlock(); |
7ad0a0cb MD |
340 | return -ENOSYS; |
341 | #if 0 | |
3bd1e081 MD |
342 | if (ctx->on_update_stream != NULL) { |
343 | ret = ctx->on_update_stream(msg.u.stream.stream_key, msg.u.stream.state); | |
344 | if (ret == 0) { | |
345 | consumer_change_stream_state(msg.u.stream.stream_key, msg.u.stream.state); | |
346 | } else if (ret < 0) { | |
347 | goto end; | |
348 | } | |
349 | } else { | |
350 | consumer_change_stream_state(msg.u.stream.stream_key, | |
351 | msg.u.stream.state); | |
352 | } | |
353 | break; | |
3f8e211f | 354 | #endif |
3bd1e081 MD |
355 | } |
356 | default: | |
357 | break; | |
358 | } | |
3f8e211f | 359 | |
04fdd819 | 360 | /* |
3f8e211f DG |
361 | * Wake-up the other end by writing a null byte in the pipe (non-blocking). |
362 | * Important note: Because writing into the pipe is non-blocking (and | |
363 | * therefore we allow dropping wakeup data, as long as there is wakeup data | |
364 | * present in the pipe buffer to wake up the other end), the other end | |
365 | * should perform the following sequence for waiting: | |
366 | * | |
04fdd819 MD |
367 | * 1) empty the pipe (reads). |
368 | * 2) perform update operation. | |
369 | * 3) wait on the pipe (poll). | |
370 | */ | |
371 | do { | |
372 | ret = write(ctx->consumer_poll_pipe[1], "", 1); | |
6f94560a | 373 | } while (ret < 0 && errno == EINTR); |
3bd1e081 | 374 | end_nosignal: |
b0b335c8 | 375 | rcu_read_unlock(); |
3bd1e081 MD |
376 | return 0; |
377 | } | |
378 | ||
379 | int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan) | |
380 | { | |
13161846 | 381 | struct lttng_ust_object_data obj; |
3bd1e081 MD |
382 | |
383 | obj.handle = -1; | |
384 | obj.shm_fd = chan->shm_fd; | |
385 | obj.wait_fd = chan->wait_fd; | |
386 | obj.memory_map_size = chan->mmap_len; | |
387 | chan->handle = ustctl_map_channel(&obj); | |
388 | if (!chan->handle) { | |
389 | return -ENOMEM; | |
390 | } | |
b5c5fc29 | 391 | chan->wait_fd_is_copy = 1; |
2c1dd183 | 392 | chan->shm_fd = -1; |
b5c5fc29 | 393 | |
3bd1e081 MD |
394 | return 0; |
395 | } | |
396 | ||
d056b477 MD |
397 | void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream) |
398 | { | |
399 | ustctl_flush_buffer(stream->chan->handle, stream->buf, 0); | |
effcf122 | 400 | stream->hangup_flush_done = 1; |
d056b477 MD |
401 | } |
402 | ||
3bd1e081 MD |
403 | void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan) |
404 | { | |
405 | ustctl_unmap_channel(chan->handle); | |
406 | } | |
407 | ||
408 | int lttng_ustconsumer_allocate_stream(struct lttng_consumer_stream *stream) | |
409 | { | |
13161846 | 410 | struct lttng_ust_object_data obj; |
3bd1e081 MD |
411 | int ret; |
412 | ||
413 | obj.handle = -1; | |
414 | obj.shm_fd = stream->shm_fd; | |
415 | obj.wait_fd = stream->wait_fd; | |
416 | obj.memory_map_size = stream->mmap_len; | |
417 | ret = ustctl_add_stream(stream->chan->handle, &obj); | |
418 | if (ret) | |
419 | return ret; | |
420 | stream->buf = ustctl_open_stream_read(stream->chan->handle, stream->cpu); | |
421 | if (!stream->buf) | |
422 | return -EBUSY; | |
2c1dd183 MD |
423 | /* ustctl_open_stream_read has closed the shm fd. */ |
424 | stream->wait_fd_is_copy = 1; | |
425 | stream->shm_fd = -1; | |
426 | ||
3bd1e081 MD |
427 | stream->mmap_base = ustctl_get_mmap_base(stream->chan->handle, stream->buf); |
428 | if (!stream->mmap_base) { | |
429 | return -EINVAL; | |
430 | } | |
ee77a7b0 | 431 | |
3bd1e081 MD |
432 | return 0; |
433 | } | |
434 | ||
435 | void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream) | |
436 | { | |
437 | ustctl_close_stream_read(stream->chan->handle, stream->buf); | |
438 | } | |
d41f73b7 MD |
439 | |
440 | ||
441 | int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream, | |
442 | struct lttng_consumer_local_data *ctx) | |
443 | { | |
444 | unsigned long len; | |
445 | int err; | |
446 | long ret = 0; | |
447 | struct lttng_ust_shm_handle *handle; | |
448 | struct lttng_ust_lib_ring_buffer *buf; | |
449 | char dummy; | |
450 | ssize_t readlen; | |
451 | ||
452 | DBG("In read_subbuffer (wait_fd: %d, stream key: %d)", | |
453 | stream->wait_fd, stream->key); | |
454 | ||
455 | /* We can consume the 1 byte written into the wait_fd by UST */ | |
effcf122 MD |
456 | if (!stream->hangup_flush_done) { |
457 | do { | |
458 | readlen = read(stream->wait_fd, &dummy, 1); | |
87dc6a9c | 459 | } while (readlen == -1 && errno == EINTR); |
effcf122 MD |
460 | if (readlen == -1) { |
461 | ret = readlen; | |
462 | goto end; | |
463 | } | |
d41f73b7 MD |
464 | } |
465 | ||
466 | buf = stream->buf; | |
467 | handle = stream->chan->handle; | |
468 | /* Get the next subbuffer */ | |
469 | err = ustctl_get_next_subbuf(handle, buf); | |
470 | if (err != 0) { | |
effcf122 | 471 | ret = -ret; /* ustctl_get_next_subbuf returns negative, caller expect positive. */ |
d41f73b7 MD |
472 | /* |
473 | * This is a debug message even for single-threaded consumer, | |
474 | * because poll() have more relaxed criterions than get subbuf, | |
475 | * so get_subbuf may fail for short race windows where poll() | |
476 | * would issue wakeups. | |
477 | */ | |
478 | DBG("Reserving sub buffer failed (everything is normal, " | |
479 | "it is due to concurrency)"); | |
480 | goto end; | |
481 | } | |
482 | assert(stream->output == LTTNG_EVENT_MMAP); | |
483 | /* read the used subbuffer size */ | |
484 | err = ustctl_get_padded_subbuf_size(handle, buf, &len); | |
effcf122 | 485 | assert(err == 0); |
d41f73b7 MD |
486 | /* write the subbuffer to the tracefile */ |
487 | ret = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, len); | |
47e81c02 | 488 | if (ret != len) { |
d41f73b7 MD |
489 | /* |
490 | * display the error but continue processing to try | |
491 | * to release the subbuffer | |
492 | */ | |
a4b92340 | 493 | ERR("Error writing to tracefile (expected: %ld, got: %ld)", ret, len); |
d41f73b7 MD |
494 | } |
495 | err = ustctl_put_next_subbuf(handle, buf); | |
effcf122 | 496 | assert(err == 0); |
d41f73b7 MD |
497 | end: |
498 | return ret; | |
499 | } | |
500 | ||
501 | int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
502 | { | |
503 | int ret; | |
504 | ||
505 | /* Opening the tracefile in write mode */ | |
00e2e675 | 506 | if (stream->path_name != NULL && stream->net_seq_idx == -1) { |
e11d277b | 507 | ret = run_as_open(stream->path_name, |
60b6c79c MD |
508 | O_WRONLY|O_CREAT|O_TRUNC, |
509 | S_IRWXU|S_IRWXG|S_IRWXO, | |
510 | stream->uid, stream->gid); | |
d41f73b7 MD |
511 | if (ret < 0) { |
512 | ERR("Opening %s", stream->path_name); | |
4c462e79 | 513 | PERROR("open"); |
d41f73b7 MD |
514 | goto error; |
515 | } | |
516 | stream->out_fd = ret; | |
517 | } | |
518 | ||
519 | /* we return 0 to let the library handle the FD internally */ | |
520 | return 0; | |
521 | ||
522 | error: | |
523 | return ret; | |
524 | } |