Commit | Line | Data |
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c39c72ee | 1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
1f8b0dff | 2 | * |
c39c72ee PMF |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
1f8b0dff | 7 | * |
c39c72ee | 8 | * This library is distributed in the hope that it will be useful, |
1f8b0dff | 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
c39c72ee PMF |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
1f8b0dff | 12 | * |
c39c72ee PMF |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
1f8b0dff PMF |
16 | */ |
17 | ||
3796af9b PMF |
18 | #define _GNU_SOURCE |
19 | ||
20 | #include <sys/types.h> | |
cd226f25 | 21 | #include <sys/stat.h> |
3796af9b | 22 | #include <sys/shm.h> |
688760ef PMF |
23 | #include <fcntl.h> |
24 | #include <unistd.h> | |
3a7b90de | 25 | #include <pthread.h> |
a3cdd4a7 | 26 | #include <signal.h> |
3796af9b PMF |
27 | |
28 | #include <stdlib.h> | |
29 | #include <stdio.h> | |
30 | #include <string.h> | |
a3cdd4a7 PMF |
31 | #include <errno.h> |
32 | #include <assert.h> | |
cd226f25 | 33 | #include <getopt.h> |
3796af9b | 34 | |
0b0cd937 | 35 | #include "ustd.h" |
3796af9b PMF |
36 | #include "localerr.h" |
37 | #include "ustcomm.h" | |
38 | ||
3a7b90de PMF |
39 | /* return value: 0 = subbuffer is finished, it won't produce data anymore |
40 | * 1 = got subbuffer successfully | |
41 | * <0 = error | |
42 | */ | |
3796af9b | 43 | |
8cefc145 PMF |
44 | #define GET_SUBBUF_OK 1 |
45 | #define GET_SUBBUF_DONE 0 | |
46 | #define GET_SUBBUF_DIED 2 | |
47 | ||
a3cdd4a7 PMF |
48 | #define PUT_SUBBUF_OK 1 |
49 | #define PUT_SUBBUF_DIED 0 | |
50 | #define PUT_SUBBUF_PUSHED 2 | |
51 | ||
c97d4437 | 52 | char *sock_path=NULL; |
cd226f25 PMF |
53 | char *trace_path=NULL; |
54 | ||
3158b808 PMF |
55 | /* Number of active buffers and the mutex to protect it. */ |
56 | int active_buffers = 0; | |
57 | pthread_mutex_t active_buffers_mutex = PTHREAD_MUTEX_INITIALIZER; | |
58 | /* Whether a request to end the program was received. */ | |
59 | sig_atomic_t terminate_req = 0; | |
60 | ||
a3cdd4a7 PMF |
61 | int test_sigpipe(void) |
62 | { | |
63 | sigset_t sigset; | |
64 | int result; | |
65 | ||
66 | result = sigemptyset(&sigset); | |
67 | if(result == -1) { | |
4d70f833 | 68 | PERROR("sigemptyset"); |
a3cdd4a7 PMF |
69 | return -1; |
70 | } | |
71 | result = sigaddset(&sigset, SIGPIPE); | |
72 | if(result == -1) { | |
4d70f833 | 73 | PERROR("sigaddset"); |
a3cdd4a7 PMF |
74 | return -1; |
75 | } | |
76 | ||
77 | result = sigtimedwait(&sigset, NULL, &(struct timespec){0,0}); | |
78 | if(result == -1 && errno == EAGAIN) { | |
79 | /* no signal received */ | |
80 | return 0; | |
81 | } | |
82 | else if(result == -1) { | |
4d70f833 | 83 | PERROR("sigtimedwait"); |
a3cdd4a7 PMF |
84 | return -1; |
85 | } | |
86 | else if(result == SIGPIPE) { | |
87 | /* received sigpipe */ | |
88 | return 1; | |
89 | } | |
90 | else { | |
91 | assert(0); | |
92 | } | |
93 | } | |
94 | ||
688760ef PMF |
95 | int get_subbuffer(struct buffer_info *buf) |
96 | { | |
ab805ccd PMF |
97 | char *send_msg=NULL; |
98 | char *received_msg=NULL; | |
99 | char *rep_code=NULL; | |
688760ef PMF |
100 | int retval; |
101 | int result; | |
102 | ||
103 | asprintf(&send_msg, "get_subbuffer %s", buf->name); | |
3bb56863 | 104 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); |
a3cdd4a7 PMF |
105 | if(test_sigpipe()) { |
106 | WARN("process %d destroyed before we could connect to it", buf->pid); | |
ab805ccd PMF |
107 | retval = GET_SUBBUF_DONE; |
108 | goto end; | |
a3cdd4a7 PMF |
109 | } |
110 | else if(result < 0) { | |
3bb56863 | 111 | ERR("get_subbuffer: ustcomm_send_request failed"); |
ab805ccd PMF |
112 | retval = -1; |
113 | goto end; | |
688760ef | 114 | } |
688760ef PMF |
115 | |
116 | result = sscanf(received_msg, "%as %ld", &rep_code, &buf->consumed_old); | |
3a7b90de | 117 | if(result != 2 && result != 1) { |
688760ef | 118 | ERR("unable to parse response to get_subbuffer"); |
ab805ccd PMF |
119 | retval = -1; |
120 | goto end_rep; | |
688760ef | 121 | } |
3a7b90de PMF |
122 | |
123 | DBG("received msg is %s", received_msg); | |
688760ef PMF |
124 | |
125 | if(!strcmp(rep_code, "OK")) { | |
126 | DBG("got subbuffer %s", buf->name); | |
8cefc145 | 127 | retval = GET_SUBBUF_OK; |
688760ef | 128 | } |
3a7b90de | 129 | else if(nth_token_is(received_msg, "END", 0) == 1) { |
ab805ccd PMF |
130 | retval = GET_SUBBUF_DONE; |
131 | goto end_rep; | |
3a7b90de | 132 | } |
688760ef | 133 | else { |
3a7b90de PMF |
134 | DBG("error getting subbuffer %s", buf->name); |
135 | retval = -1; | |
688760ef PMF |
136 | } |
137 | ||
3a7b90de | 138 | /* FIMXE: free correctly the stuff */ |
ab805ccd PMF |
139 | end_rep: |
140 | if(rep_code) | |
141 | free(rep_code); | |
142 | end: | |
143 | if(send_msg) | |
144 | free(send_msg); | |
145 | if(received_msg) | |
146 | free(received_msg); | |
147 | ||
688760ef PMF |
148 | return retval; |
149 | } | |
150 | ||
151 | int put_subbuffer(struct buffer_info *buf) | |
152 | { | |
ab805ccd PMF |
153 | char *send_msg=NULL; |
154 | char *received_msg=NULL; | |
155 | char *rep_code=NULL; | |
688760ef PMF |
156 | int retval; |
157 | int result; | |
158 | ||
159 | asprintf(&send_msg, "put_subbuffer %s %ld", buf->name, buf->consumed_old); | |
3bb56863 | 160 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); |
ab805ccd PMF |
161 | if(result < 0 && errno == ECONNRESET) { |
162 | retval = PUT_SUBBUF_DIED; | |
163 | goto end; | |
164 | } | |
688760ef PMF |
165 | if(result < 0) { |
166 | ERR("put_subbuffer: send_message failed"); | |
ab805ccd PMF |
167 | retval = -1; |
168 | goto end; | |
688760ef | 169 | } |
688760ef PMF |
170 | |
171 | result = sscanf(received_msg, "%as", &rep_code); | |
172 | if(result != 1) { | |
173 | ERR("unable to parse response to put_subbuffer"); | |
ab805ccd PMF |
174 | retval = -1; |
175 | goto end_rep; | |
688760ef | 176 | } |
688760ef PMF |
177 | |
178 | if(!strcmp(rep_code, "OK")) { | |
179 | DBG("subbuffer put %s", buf->name); | |
a3cdd4a7 | 180 | retval = PUT_SUBBUF_OK; |
688760ef PMF |
181 | } |
182 | else { | |
a3cdd4a7 | 183 | DBG("put_subbuffer: received error, we were pushed"); |
ab805ccd PMF |
184 | retval = PUT_SUBBUF_PUSHED; |
185 | goto end_rep; | |
688760ef PMF |
186 | } |
187 | ||
ab805ccd PMF |
188 | end_rep: |
189 | if(rep_code) | |
190 | free(rep_code); | |
191 | ||
192 | end: | |
193 | if(send_msg) | |
194 | free(send_msg); | |
195 | if(received_msg) | |
196 | free(received_msg); | |
197 | ||
688760ef PMF |
198 | return retval; |
199 | } | |
200 | ||
a3cdd4a7 PMF |
201 | /* This write is patient because it restarts if it was incomplete. |
202 | */ | |
203 | ||
688760ef PMF |
204 | ssize_t patient_write(int fd, const void *buf, size_t count) |
205 | { | |
206 | const char *bufc = (const char *) buf; | |
207 | int result; | |
208 | ||
209 | for(;;) { | |
210 | result = write(fd, bufc, count); | |
211 | if(result <= 0) { | |
212 | return result; | |
213 | } | |
214 | count -= result; | |
215 | bufc += result; | |
216 | ||
217 | if(count == 0) { | |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
222 | return bufc-(const char *)buf; | |
223 | } | |
224 | ||
3158b808 PMF |
225 | void decrement_active_buffers(void *arg) |
226 | { | |
227 | pthread_mutex_lock(&active_buffers_mutex); | |
228 | active_buffers--; | |
229 | pthread_mutex_unlock(&active_buffers_mutex); | |
230 | } | |
231 | ||
3a7b90de PMF |
232 | void *consumer_thread(void *arg) |
233 | { | |
234 | struct buffer_info *buf = (struct buffer_info *) arg; | |
235 | int result; | |
236 | ||
3158b808 PMF |
237 | pthread_cleanup_push(decrement_active_buffers, NULL); |
238 | ||
3a7b90de | 239 | for(;;) { |
8cefc145 | 240 | /* get the subbuffer */ |
0b0cd937 PMF |
241 | result = get_subbuffer(buf); |
242 | if(result == -1) { | |
243 | ERR("error getting subbuffer"); | |
244 | continue; | |
3a7b90de | 245 | } |
0b0cd937 PMF |
246 | else if(result == GET_SUBBUF_DONE) { |
247 | /* this is done */ | |
248 | break; | |
249 | } | |
250 | else if(result == GET_SUBBUF_DIED) { | |
251 | finish_consuming_dead_subbuffer(buf); | |
252 | break; | |
3a7b90de PMF |
253 | } |
254 | ||
255 | /* write data to file */ | |
256 | result = patient_write(buf->file_fd, buf->mem + (buf->consumed_old & (buf->n_subbufs * buf->subbuf_size-1)), buf->subbuf_size); | |
257 | if(result == -1) { | |
258 | PERROR("write"); | |
259 | /* FIXME: maybe drop this trace */ | |
260 | } | |
261 | ||
8cefc145 | 262 | /* put the subbuffer */ |
0b0cd937 PMF |
263 | result = put_subbuffer(buf); |
264 | if(result == -1) { | |
a3cdd4a7 PMF |
265 | ERR("unknown error putting subbuffer (channel=%s)", buf->name); |
266 | break; | |
267 | } | |
268 | else if(result == PUT_SUBBUF_PUSHED) { | |
269 | ERR("Buffer overflow (channel=%s), reader pushed. This channel will not be usable passed this point.", buf->name); | |
0b0cd937 | 270 | break; |
3a7b90de | 271 | } |
a3cdd4a7 PMF |
272 | else if(result == PUT_SUBBUF_DIED) { |
273 | WARN("application died while putting subbuffer"); | |
274 | /* FIXME: probably need to skip the first subbuffer in finish_consuming_dead_subbuffer */ | |
275 | finish_consuming_dead_subbuffer(buf); | |
9f654956 | 276 | break; |
a3cdd4a7 PMF |
277 | } |
278 | else if(result == PUT_SUBBUF_OK) { | |
279 | } | |
3a7b90de PMF |
280 | } |
281 | ||
282 | DBG("thread for buffer %s is stopping", buf->name); | |
283 | ||
8cefc145 PMF |
284 | /* FIXME: destroy, unalloc... */ |
285 | ||
3158b808 PMF |
286 | pthread_cleanup_pop(1); |
287 | ||
3a7b90de PMF |
288 | return NULL; |
289 | } | |
290 | ||
72ebd39a PMF |
291 | int create_dir_if_needed(char *dir) |
292 | { | |
293 | int result; | |
294 | result = mkdir(dir, 0777); | |
295 | if(result == -1) { | |
296 | if(errno != EEXIST) { | |
4d70f833 | 297 | PERROR("mkdir"); |
72ebd39a PMF |
298 | return -1; |
299 | } | |
300 | } | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
cd226f25 PMF |
305 | int is_directory(const char *dir) |
306 | { | |
307 | int result; | |
308 | struct stat st; | |
309 | ||
310 | result = stat(dir, &st); | |
311 | if(result == -1) { | |
312 | PERROR("stat"); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | if(!S_ISDIR(st.st_mode)) { | |
317 | return 0; | |
318 | } | |
319 | ||
320 | return 1; | |
321 | } | |
322 | ||
3a7b90de PMF |
323 | int add_buffer(pid_t pid, char *bufname) |
324 | { | |
325 | struct buffer_info *buf; | |
326 | char *send_msg; | |
327 | char *received_msg; | |
328 | int result; | |
329 | char *tmp; | |
330 | int fd; | |
331 | pthread_t thr; | |
a3cdd4a7 | 332 | struct shmid_ds shmds; |
3a7b90de PMF |
333 | |
334 | buf = (struct buffer_info *) malloc(sizeof(struct buffer_info)); | |
335 | if(buf == NULL) { | |
336 | ERR("add_buffer: insufficient memory"); | |
337 | return -1; | |
338 | } | |
339 | ||
340 | buf->name = bufname; | |
341 | buf->pid = pid; | |
342 | ||
4e2a8808 PMF |
343 | /* connect to app */ |
344 | result = ustcomm_connect_app(buf->pid, &buf->conn); | |
345 | if(result) { | |
a3cdd4a7 | 346 | WARN("unable to connect to process, it probably died before we were able to connect"); |
4e2a8808 PMF |
347 | return -1; |
348 | } | |
349 | ||
ed1317e7 PMF |
350 | /* get pidunique */ |
351 | asprintf(&send_msg, "get_pidunique"); | |
352 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); | |
353 | free(send_msg); | |
354 | if(result == -1) { | |
355 | ERR("problem in ustcomm_send_request(get_pidunique)"); | |
356 | return -1; | |
357 | } | |
358 | ||
359 | result = sscanf(received_msg, "%lld", &buf->pidunique); | |
360 | if(result != 1) { | |
361 | ERR("unable to parse response to get_pidunique"); | |
362 | return -1; | |
363 | } | |
364 | free(received_msg); | |
365 | DBG("got pidunique %lld", buf->pidunique); | |
366 | ||
3a7b90de PMF |
367 | /* get shmid */ |
368 | asprintf(&send_msg, "get_shmid %s", buf->name); | |
a3cdd4a7 | 369 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); |
3a7b90de | 370 | free(send_msg); |
a3cdd4a7 PMF |
371 | if(result == -1) { |
372 | ERR("problem in ustcomm_send_request(get_shmid)"); | |
373 | return -1; | |
374 | } | |
3a7b90de | 375 | |
8cefc145 PMF |
376 | result = sscanf(received_msg, "%d %d", &buf->shmid, &buf->bufstruct_shmid); |
377 | if(result != 2) { | |
3a7b90de PMF |
378 | ERR("unable to parse response to get_shmid"); |
379 | return -1; | |
380 | } | |
381 | free(received_msg); | |
8cefc145 | 382 | DBG("got shmids %d %d", buf->shmid, buf->bufstruct_shmid); |
3a7b90de PMF |
383 | |
384 | /* get n_subbufs */ | |
385 | asprintf(&send_msg, "get_n_subbufs %s", buf->name); | |
a3cdd4a7 | 386 | result = ustcomm_send_request(&buf->conn, send_msg, &received_msg); |
3a7b90de | 387 | free(send_msg); |
a3cdd4a7 PMF |
388 | if(result == -1) { |
389 | ERR("problem in ustcomm_send_request(g_n_subbufs)"); | |
390 | return -1; | |
391 | } | |
3a7b90de PMF |
392 | |
393 | result = sscanf(received_msg, "%d", &buf->n_subbufs); | |
394 | if(result != 1) { | |
395 | ERR("unable to parse response to get_n_subbufs"); | |
396 | return -1; | |
397 | } | |
398 | free(received_msg); | |
399 | DBG("got n_subbufs %d", buf->n_subbufs); | |
400 | ||
401 | /* get subbuf size */ | |
402 | asprintf(&send_msg, "get_subbuf_size %s", buf->name); | |
4e2a8808 | 403 | ustcomm_send_request(&buf->conn, send_msg, &received_msg); |
3a7b90de PMF |
404 | free(send_msg); |
405 | ||
406 | result = sscanf(received_msg, "%d", &buf->subbuf_size); | |
407 | if(result != 1) { | |
408 | ERR("unable to parse response to get_subbuf_size"); | |
409 | return -1; | |
410 | } | |
411 | free(received_msg); | |
412 | DBG("got subbuf_size %d", buf->subbuf_size); | |
413 | ||
414 | /* attach memory */ | |
415 | buf->mem = shmat(buf->shmid, NULL, 0); | |
416 | if(buf->mem == (void *) 0) { | |
4d70f833 | 417 | PERROR("shmat"); |
3a7b90de PMF |
418 | return -1; |
419 | } | |
8cefc145 PMF |
420 | DBG("successfully attached buffer memory"); |
421 | ||
422 | buf->bufstruct_mem = shmat(buf->bufstruct_shmid, NULL, 0); | |
423 | if(buf->bufstruct_mem == (void *) 0) { | |
4d70f833 | 424 | PERROR("shmat"); |
8cefc145 PMF |
425 | return -1; |
426 | } | |
427 | DBG("successfully attached buffer bufstruct memory"); | |
3a7b90de | 428 | |
a3cdd4a7 PMF |
429 | /* obtain info on the memory segment */ |
430 | result = shmctl(buf->shmid, IPC_STAT, &shmds); | |
431 | if(result == -1) { | |
4d70f833 | 432 | PERROR("shmctl"); |
a3cdd4a7 PMF |
433 | return -1; |
434 | } | |
435 | buf->memlen = shmds.shm_segsz; | |
436 | ||
3a7b90de | 437 | /* open file for output */ |
cd226f25 PMF |
438 | if(!trace_path) { |
439 | /* Only create the directory if using the default path, because | |
440 | * of the risk of typo when using trace path override. We don't | |
441 | * want to risk creating plenty of useless directories in that case. | |
442 | */ | |
443 | result = create_dir_if_needed(USTD_DEFAULT_TRACE_PATH); | |
444 | if(result == -1) { | |
445 | ERR("could not create directory %s", USTD_DEFAULT_TRACE_PATH); | |
446 | return -1; | |
447 | } | |
448 | ||
449 | trace_path = USTD_DEFAULT_TRACE_PATH; | |
72ebd39a PMF |
450 | } |
451 | ||
ed1317e7 | 452 | asprintf(&tmp, "%s/%u_%lld", trace_path, buf->pid, buf->pidunique); |
72ebd39a PMF |
453 | result = create_dir_if_needed(tmp); |
454 | if(result == -1) { | |
455 | ERR("could not create directory %s", tmp); | |
456 | free(tmp); | |
457 | return -1; | |
458 | } | |
459 | free(tmp); | |
460 | ||
ed1317e7 PMF |
461 | asprintf(&tmp, "%s/%u_%lld/%s_0", trace_path, buf->pid, buf->pidunique, buf->name); |
462 | result = fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 00600); | |
3a7b90de PMF |
463 | if(result == -1) { |
464 | PERROR("open"); | |
6cb88bc0 | 465 | ERR("failed opening trace file %s", tmp); |
3a7b90de PMF |
466 | return -1; |
467 | } | |
468 | buf->file_fd = fd; | |
469 | free(tmp); | |
470 | ||
3158b808 PMF |
471 | pthread_mutex_lock(&active_buffers_mutex); |
472 | active_buffers++; | |
473 | pthread_mutex_unlock(&active_buffers_mutex); | |
474 | ||
3a7b90de PMF |
475 | pthread_create(&thr, NULL, consumer_thread, buf); |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
cd226f25 PMF |
480 | void usage(void) |
481 | { | |
482 | fprintf(stderr, "Usage:\nustd OPTIONS\n\nOptions:\n" | |
483 | "\t-h\t\tDisplay this usage.\n" | |
484 | "\t-o DIR\t\tSpecify the directory where to output the traces.\n" | |
485 | "\t-s PATH\t\tSpecify the path to use for the daemon socket.\n"); | |
486 | } | |
487 | ||
488 | int parse_args(int argc, char **argv) | |
489 | { | |
490 | int c; | |
491 | ||
492 | while (1) { | |
493 | int option_index = 0; | |
494 | static struct option long_options[] = { | |
495 | {"help", 0, 0, 'h'}, | |
496 | {"version", 0, 0, 'V'}, | |
497 | {0, 0, 0, 0} | |
498 | }; | |
499 | ||
500 | c = getopt_long(argc, argv, "hs:o:", long_options, &option_index); | |
501 | if (c == -1) | |
502 | break; | |
503 | ||
504 | switch (c) { | |
505 | case 0: | |
506 | printf("option %s", long_options[option_index].name); | |
507 | if (optarg) | |
508 | printf(" with arg %s", optarg); | |
509 | printf("\n"); | |
510 | break; | |
511 | case 's': | |
512 | sock_path = optarg; | |
513 | break; | |
514 | case 'o': | |
515 | trace_path = optarg; | |
516 | if(!is_directory(trace_path)) { | |
517 | ERR("Not a valid directory. (%s)", trace_path); | |
518 | return -1; | |
519 | } | |
520 | break; | |
521 | case 'h': | |
522 | usage(); | |
523 | exit(0); | |
524 | case 'V': | |
525 | printf("Version 0.0\n"); | |
526 | break; | |
527 | ||
528 | default: | |
529 | /* unknown option or other error; error is | |
530 | printed by getopt, just return */ | |
531 | return -1; | |
532 | } | |
533 | } | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
3158b808 PMF |
538 | void sigterm_handler(int sig) |
539 | { | |
540 | terminate_req = 1; | |
541 | } | |
542 | ||
3796af9b PMF |
543 | int main(int argc, char **argv) |
544 | { | |
545 | struct ustcomm_ustd ustd; | |
546 | int result; | |
a3cdd4a7 | 547 | sigset_t sigset; |
3158b808 PMF |
548 | struct sigaction sa; |
549 | ||
550 | result = sigemptyset(&sigset); | |
551 | if(result == -1) { | |
4d70f833 | 552 | PERROR("sigemptyset"); |
3158b808 PMF |
553 | return 1; |
554 | } | |
555 | sa.sa_handler = sigterm_handler; | |
556 | sa.sa_mask = sigset; | |
557 | sa.sa_flags = SA_RESTART; | |
558 | result = sigaction(SIGTERM, &sa, NULL); | |
559 | if(result == -1) { | |
560 | PERROR("sigaction"); | |
561 | return 1; | |
562 | } | |
3796af9b | 563 | |
cd226f25 PMF |
564 | result = parse_args(argc, argv); |
565 | if(result == -1) { | |
566 | exit(1); | |
567 | } | |
568 | ||
569 | result = ustcomm_init_ustd(&ustd, sock_path); | |
3796af9b PMF |
570 | if(result == -1) { |
571 | ERR("failed to initialize socket"); | |
572 | return 1; | |
573 | } | |
574 | ||
3158b808 | 575 | /* setup handler for SIGPIPE */ |
a3cdd4a7 PMF |
576 | result = sigemptyset(&sigset); |
577 | if(result == -1) { | |
4d70f833 | 578 | PERROR("sigemptyset"); |
a3cdd4a7 PMF |
579 | return 1; |
580 | } | |
581 | result = sigaddset(&sigset, SIGPIPE); | |
582 | if(result == -1) { | |
4d70f833 | 583 | PERROR("sigaddset"); |
a3cdd4a7 PMF |
584 | return 1; |
585 | } | |
586 | result = sigprocmask(SIG_BLOCK, &sigset, NULL); | |
587 | if(result == -1) { | |
4d70f833 | 588 | PERROR("sigprocmask"); |
a3cdd4a7 PMF |
589 | return 1; |
590 | } | |
591 | ||
688760ef | 592 | /* app loop */ |
3796af9b PMF |
593 | for(;;) { |
594 | char *recvbuf; | |
595 | ||
3a7b90de | 596 | /* check for requests on our public socket */ |
688760ef PMF |
597 | result = ustcomm_ustd_recv_message(&ustd, &recvbuf, NULL, 100); |
598 | if(result == -1) { | |
599 | ERR("error in ustcomm_ustd_recv_message"); | |
600 | continue; | |
601 | } | |
602 | if(result > 0) { | |
603 | if(!strncmp(recvbuf, "collect", 7)) { | |
604 | pid_t pid; | |
605 | char *bufname; | |
606 | int result; | |
3796af9b | 607 | |
688760ef PMF |
608 | result = sscanf(recvbuf, "%*s %d %50as", &pid, &bufname); |
609 | if(result != 2) { | |
610 | fprintf(stderr, "parsing error: %s\n", recvbuf); | |
611 | } | |
3796af9b | 612 | |
688760ef PMF |
613 | result = add_buffer(pid, bufname); |
614 | if(result < 0) { | |
615 | ERR("error in add_buffer"); | |
616 | continue; | |
617 | } | |
3796af9b PMF |
618 | } |
619 | ||
688760ef | 620 | free(recvbuf); |
3796af9b | 621 | } |
3158b808 PMF |
622 | |
623 | if(terminate_req) { | |
624 | pthread_mutex_lock(&active_buffers_mutex); | |
625 | if(active_buffers == 0) { | |
626 | pthread_mutex_unlock(&active_buffers_mutex); | |
627 | break; | |
628 | } | |
629 | pthread_mutex_unlock(&active_buffers_mutex); | |
630 | } | |
3796af9b PMF |
631 | } |
632 | ||
633 | return 0; | |
634 | } |