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d159ac37 AH |
1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * 2010 Alexis Halle | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * This library 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 GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with this library; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | ||
21 | #include <sys/shm.h> | |
22 | #include <unistd.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | ||
26 | #include <stdlib.h> | |
27 | #include <stdio.h> | |
28 | #include <string.h> | |
29 | #include <errno.h> | |
30 | #include <assert.h> | |
31 | ||
d6c9f207 AH |
32 | #include <ust/ustd.h> |
33 | #include "lowlevel.h" | |
d159ac37 AH |
34 | #include "usterr.h" |
35 | #include "ustcomm.h" | |
36 | ||
37 | /* return value: 0 = subbuffer is finished, it won't produce data anymore | |
38 | * 1 = got subbuffer successfully | |
39 | * <0 = error | |
40 | */ | |
41 | ||
42 | #define GET_SUBBUF_OK 1 | |
43 | #define GET_SUBBUF_DONE 0 | |
44 | #define GET_SUBBUF_DIED 2 | |
45 | ||
46 | #define PUT_SUBBUF_OK 1 | |
47 | #define PUT_SUBBUF_DIED 0 | |
48 | #define PUT_SUBBUF_PUSHED 2 | |
49 | #define PUT_SUBBUF_DONE 3 | |
50 | ||
51 | #define UNIX_PATH_MAX 108 | |
52 | ||
53 | int get_subbuffer(struct buffer_info *buf) | |
54 | { | |
55 | char *send_msg=NULL; | |
56 | char *received_msg=NULL; | |
57 | char *rep_code=NULL; | |
58 | int retval; | |
59 | int result; | |
60 | ||
08b8805e DG |
61 | if (asprintf(&send_msg, "get_subbuffer %s", buf->name) < 0) { |
62 | ERR("get_subbuffer : asprintf failed (%s)", | |
63 | buf->name); | |
64 | retval = -1; | |
65 | goto end; | |
66 | } | |
f3f8cc91 | 67 | result = ustcomm_send_request(buf->conn, send_msg, &received_msg); |
d159ac37 AH |
68 | if((result == -1 && (errno == ECONNRESET || errno == EPIPE)) || result == 0) { |
69 | DBG("app died while being traced"); | |
70 | retval = GET_SUBBUF_DIED; | |
71 | goto end; | |
72 | } | |
73 | else if(result < 0) { | |
74 | ERR("get_subbuffer: ustcomm_send_request failed"); | |
75 | retval = -1; | |
76 | goto end; | |
77 | } | |
78 | ||
79 | result = sscanf(received_msg, "%as %ld", &rep_code, &buf->consumed_old); | |
80 | if(result != 2 && result != 1) { | |
81 | ERR("unable to parse response to get_subbuffer"); | |
82 | retval = -1; | |
83 | free(received_msg); | |
84 | goto end_rep; | |
85 | } | |
86 | ||
87 | if(!strcmp(rep_code, "OK")) { | |
88 | DBG("got subbuffer %s", buf->name); | |
89 | retval = GET_SUBBUF_OK; | |
90 | } | |
91 | else if(nth_token_is(received_msg, "END", 0) == 1) { | |
92 | retval = GET_SUBBUF_DONE; | |
93 | goto end_rep; | |
94 | } | |
95 | else if(!strcmp(received_msg, "NOTFOUND")) { | |
96 | DBG("For buffer %s, the trace was not found. This likely means it was destroyed by the user.", buf->name); | |
97 | retval = GET_SUBBUF_DIED; | |
98 | goto end_rep; | |
99 | } | |
100 | else { | |
101 | DBG("error getting subbuffer %s", buf->name); | |
102 | retval = -1; | |
103 | } | |
104 | ||
105 | /* FIXME: free correctly the stuff */ | |
106 | end_rep: | |
107 | if(rep_code) | |
108 | free(rep_code); | |
109 | end: | |
110 | if(send_msg) | |
111 | free(send_msg); | |
112 | if(received_msg) | |
113 | free(received_msg); | |
114 | ||
115 | return retval; | |
116 | } | |
117 | ||
118 | int put_subbuffer(struct buffer_info *buf) | |
119 | { | |
120 | char *send_msg=NULL; | |
121 | char *received_msg=NULL; | |
122 | char *rep_code=NULL; | |
123 | int retval; | |
124 | int result; | |
125 | ||
08b8805e DG |
126 | if (asprintf(&send_msg, "put_subbuffer %s %ld", buf->name, buf->consumed_old) < 0) { |
127 | ERR("put_subbuffer : asprintf failed (%s %ld)", | |
128 | buf->name, buf->consumed_old); | |
129 | retval = -1; | |
130 | goto end; | |
131 | } | |
f3f8cc91 | 132 | result = ustcomm_send_request(buf->conn, send_msg, &received_msg); |
d159ac37 AH |
133 | if(result < 0 && (errno == ECONNRESET || errno == EPIPE)) { |
134 | retval = PUT_SUBBUF_DIED; | |
135 | goto end; | |
136 | } | |
137 | else if(result < 0) { | |
138 | ERR("put_subbuffer: send_message failed"); | |
139 | retval = -1; | |
140 | goto end; | |
141 | } | |
142 | else if(result == 0) { | |
143 | /* Program seems finished. However this might not be | |
144 | * the last subbuffer that has to be collected. | |
145 | */ | |
146 | retval = PUT_SUBBUF_DIED; | |
147 | goto end; | |
148 | } | |
149 | ||
150 | result = sscanf(received_msg, "%as", &rep_code); | |
151 | if(result != 1) { | |
152 | ERR("unable to parse response to put_subbuffer"); | |
153 | retval = -1; | |
154 | goto end_rep; | |
155 | } | |
156 | ||
157 | if(!strcmp(rep_code, "OK")) { | |
158 | DBG("subbuffer put %s", buf->name); | |
159 | retval = PUT_SUBBUF_OK; | |
160 | } | |
161 | else if(!strcmp(received_msg, "NOTFOUND")) { | |
162 | DBG("For buffer %s, the trace was not found. This likely means it was destroyed by the user.", buf->name); | |
163 | /* However, maybe this was not the last subbuffer. So | |
164 | * we return the program died. | |
165 | */ | |
166 | retval = PUT_SUBBUF_DIED; | |
167 | goto end_rep; | |
168 | } | |
169 | else { | |
170 | DBG("put_subbuffer: received error, we were pushed"); | |
171 | retval = PUT_SUBBUF_PUSHED; | |
172 | goto end_rep; | |
173 | } | |
174 | ||
175 | end_rep: | |
176 | if(rep_code) | |
177 | free(rep_code); | |
178 | ||
179 | end: | |
180 | if(send_msg) | |
181 | free(send_msg); | |
182 | if(received_msg) | |
183 | free(received_msg); | |
184 | ||
185 | return retval; | |
186 | } | |
187 | ||
188 | void decrement_active_buffers(void *arg) | |
189 | { | |
190 | struct libustd_instance *instance = arg; | |
191 | pthread_mutex_lock(&instance->mutex); | |
192 | instance->active_buffers--; | |
193 | pthread_mutex_unlock(&instance->mutex); | |
194 | } | |
195 | ||
196 | struct buffer_info *connect_buffer(struct libustd_instance *instance, pid_t pid, const char *bufname) | |
197 | { | |
198 | struct buffer_info *buf; | |
199 | char *send_msg; | |
200 | char *received_msg; | |
201 | int result; | |
d159ac37 AH |
202 | struct shmid_ds shmds; |
203 | ||
7032c7d3 | 204 | buf = (struct buffer_info *) zmalloc(sizeof(struct buffer_info)); |
d159ac37 AH |
205 | if(buf == NULL) { |
206 | ERR("add_buffer: insufficient memory"); | |
207 | return NULL; | |
208 | } | |
209 | ||
f3f8cc91 AH |
210 | buf->conn = malloc(sizeof(struct ustcomm_connection)); |
211 | if(buf->conn == NULL) { | |
212 | ERR("add_buffer: insufficient memory"); | |
213 | free(buf); | |
214 | return NULL; | |
215 | } | |
216 | ||
d159ac37 AH |
217 | buf->name = bufname; |
218 | buf->pid = pid; | |
219 | ||
220 | /* connect to app */ | |
f3f8cc91 | 221 | result = ustcomm_connect_app(buf->pid, buf->conn); |
d159ac37 AH |
222 | if(result) { |
223 | WARN("unable to connect to process, it probably died before we were able to connect"); | |
224 | return NULL; | |
225 | } | |
226 | ||
227 | /* get pidunique */ | |
08b8805e DG |
228 | if (asprintf(&send_msg, "get_pidunique") < 0) { |
229 | ERR("connect_buffer : asprintf failed (get_pidunique)"); | |
230 | return NULL; | |
231 | } | |
f3f8cc91 | 232 | result = ustcomm_send_request(buf->conn, send_msg, &received_msg); |
d159ac37 AH |
233 | free(send_msg); |
234 | if(result == -1) { | |
235 | ERR("problem in ustcomm_send_request(get_pidunique)"); | |
236 | return NULL; | |
237 | } | |
238 | if(result == 0) { | |
239 | goto error; | |
240 | } | |
241 | ||
242 | result = sscanf(received_msg, "%lld", &buf->pidunique); | |
243 | if(result != 1) { | |
244 | ERR("unable to parse response to get_pidunique"); | |
245 | return NULL; | |
246 | } | |
247 | free(received_msg); | |
248 | DBG("got pidunique %lld", buf->pidunique); | |
249 | ||
250 | /* get shmid */ | |
08b8805e DG |
251 | if (asprintf(&send_msg, "get_shmid %s", buf->name) < 0) { |
252 | ERR("connect_buffer : asprintf failed (get_schmid %s)", | |
253 | buf->name); | |
254 | return NULL; | |
255 | } | |
f3f8cc91 | 256 | result = ustcomm_send_request(buf->conn, send_msg, &received_msg); |
d159ac37 AH |
257 | free(send_msg); |
258 | if(result == -1) { | |
259 | ERR("problem in ustcomm_send_request(get_shmid)"); | |
260 | return NULL; | |
261 | } | |
262 | if(result == 0) { | |
263 | goto error; | |
264 | } | |
265 | ||
266 | result = sscanf(received_msg, "%d %d", &buf->shmid, &buf->bufstruct_shmid); | |
267 | if(result != 2) { | |
268 | ERR("unable to parse response to get_shmid (\"%s\")", received_msg); | |
269 | return NULL; | |
270 | } | |
271 | free(received_msg); | |
272 | DBG("got shmids %d %d", buf->shmid, buf->bufstruct_shmid); | |
273 | ||
274 | /* get n_subbufs */ | |
08b8805e DG |
275 | if (asprintf(&send_msg, "get_n_subbufs %s", buf->name) < 0) { |
276 | ERR("connect_buffer : asprintf failed (get_n_subbufs %s)", | |
277 | buf->name); | |
278 | return NULL; | |
279 | } | |
f3f8cc91 | 280 | result = ustcomm_send_request(buf->conn, send_msg, &received_msg); |
d159ac37 AH |
281 | free(send_msg); |
282 | if(result == -1) { | |
283 | ERR("problem in ustcomm_send_request(g_n_subbufs)"); | |
284 | return NULL; | |
285 | } | |
286 | if(result == 0) { | |
287 | goto error; | |
288 | } | |
289 | ||
290 | result = sscanf(received_msg, "%d", &buf->n_subbufs); | |
291 | if(result != 1) { | |
292 | ERR("unable to parse response to get_n_subbufs"); | |
293 | return NULL; | |
294 | } | |
295 | free(received_msg); | |
296 | DBG("got n_subbufs %d", buf->n_subbufs); | |
297 | ||
298 | /* get subbuf size */ | |
08b8805e DG |
299 | if (asprintf(&send_msg, "get_subbuf_size %s", buf->name) < 0) { |
300 | ERR("connect_buffer : asprintf failed (get_subbuf_size %s)", | |
301 | buf->name); | |
302 | return NULL; | |
303 | } | |
f3f8cc91 | 304 | result = ustcomm_send_request(buf->conn, send_msg, &received_msg); |
d159ac37 AH |
305 | free(send_msg); |
306 | if(result == -1) { | |
307 | ERR("problem in ustcomm_send_request(get_subbuf_size)"); | |
308 | return NULL; | |
309 | } | |
310 | if(result == 0) { | |
311 | goto error; | |
312 | } | |
313 | ||
314 | result = sscanf(received_msg, "%d", &buf->subbuf_size); | |
315 | if(result != 1) { | |
316 | ERR("unable to parse response to get_subbuf_size"); | |
317 | return NULL; | |
318 | } | |
319 | free(received_msg); | |
320 | DBG("got subbuf_size %d", buf->subbuf_size); | |
321 | ||
322 | /* attach memory */ | |
323 | buf->mem = shmat(buf->shmid, NULL, 0); | |
324 | if(buf->mem == (void *) 0) { | |
325 | PERROR("shmat"); | |
326 | return NULL; | |
327 | } | |
328 | DBG("successfully attached buffer memory"); | |
329 | ||
330 | buf->bufstruct_mem = shmat(buf->bufstruct_shmid, NULL, 0); | |
331 | if(buf->bufstruct_mem == (void *) 0) { | |
332 | PERROR("shmat"); | |
333 | return NULL; | |
334 | } | |
335 | DBG("successfully attached buffer bufstruct memory"); | |
336 | ||
337 | /* obtain info on the memory segment */ | |
338 | result = shmctl(buf->shmid, IPC_STAT, &shmds); | |
339 | if(result == -1) { | |
340 | PERROR("shmctl"); | |
341 | return NULL; | |
342 | } | |
343 | buf->memlen = shmds.shm_segsz; | |
344 | ||
345 | if(instance->callbacks->on_open_buffer) | |
346 | instance->callbacks->on_open_buffer(instance->callbacks, buf); | |
347 | ||
348 | pthread_mutex_lock(&instance->mutex); | |
349 | instance->active_buffers++; | |
350 | pthread_mutex_unlock(&instance->mutex); | |
351 | ||
352 | return buf; | |
353 | ||
354 | error: | |
355 | free(buf); | |
356 | return NULL; | |
357 | } | |
358 | ||
359 | static void destroy_buffer(struct libustd_callbacks *callbacks, | |
360 | struct buffer_info *buf) | |
361 | { | |
362 | int result; | |
363 | ||
f3f8cc91 | 364 | result = ustcomm_close_app(buf->conn); |
d159ac37 AH |
365 | if(result == -1) { |
366 | WARN("problem calling ustcomm_close_app"); | |
367 | } | |
368 | ||
369 | result = shmdt(buf->mem); | |
370 | if(result == -1) { | |
371 | PERROR("shmdt"); | |
372 | } | |
373 | ||
374 | result = shmdt(buf->bufstruct_mem); | |
375 | if(result == -1) { | |
376 | PERROR("shmdt"); | |
377 | } | |
378 | ||
379 | if(callbacks->on_close_buffer) | |
380 | callbacks->on_close_buffer(callbacks, buf); | |
381 | ||
f3f8cc91 | 382 | free(buf->conn); |
d159ac37 AH |
383 | free(buf); |
384 | } | |
385 | ||
386 | int consumer_loop(struct libustd_instance *instance, struct buffer_info *buf) | |
387 | { | |
388 | int result; | |
389 | ||
390 | pthread_cleanup_push(decrement_active_buffers, instance); | |
391 | ||
392 | for(;;) { | |
393 | /* get the subbuffer */ | |
394 | result = get_subbuffer(buf); | |
395 | if(result == -1) { | |
396 | ERR("error getting subbuffer"); | |
397 | continue; | |
398 | } | |
399 | else if(result == GET_SUBBUF_DONE) { | |
400 | /* this is done */ | |
401 | break; | |
402 | } | |
403 | else if(result == GET_SUBBUF_DIED) { | |
404 | finish_consuming_dead_subbuffer(instance->callbacks, buf); | |
405 | break; | |
406 | } | |
407 | ||
408 | if(instance->callbacks->on_read_subbuffer) | |
409 | instance->callbacks->on_read_subbuffer(instance->callbacks, buf); | |
410 | ||
411 | /* put the subbuffer */ | |
412 | result = put_subbuffer(buf); | |
413 | if(result == -1) { | |
414 | ERR("unknown error putting subbuffer (channel=%s)", buf->name); | |
415 | break; | |
416 | } | |
417 | else if(result == PUT_SUBBUF_PUSHED) { | |
418 | ERR("Buffer overflow (channel=%s), reader pushed. This channel will not be usable passed this point.", buf->name); | |
419 | break; | |
420 | } | |
421 | else if(result == PUT_SUBBUF_DIED) { | |
422 | DBG("application died while putting subbuffer"); | |
423 | /* Skip the first subbuffer. We are not sure it is trustable | |
424 | * because the put_subbuffer() did not complete. | |
425 | */ | |
426 | if(instance->callbacks->on_put_error) | |
427 | instance->callbacks->on_put_error(instance->callbacks, buf); | |
428 | ||
429 | finish_consuming_dead_subbuffer(instance->callbacks, buf); | |
430 | break; | |
431 | } | |
432 | else if(result == PUT_SUBBUF_DONE) { | |
433 | /* Done with this subbuffer */ | |
434 | /* FIXME: add a case where this branch is used? Upon | |
435 | * normal trace termination, at put_subbuf time, a | |
436 | * special last-subbuffer code could be returned by | |
437 | * the listener. | |
438 | */ | |
439 | break; | |
440 | } | |
441 | else if(result == PUT_SUBBUF_OK) { | |
442 | } | |
443 | } | |
444 | ||
445 | DBG("thread for buffer %s is stopping", buf->name); | |
446 | ||
447 | /* FIXME: destroy, unalloc... */ | |
448 | ||
449 | pthread_cleanup_pop(1); | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | struct consumer_thread_args { | |
455 | pid_t pid; | |
456 | const char *bufname; | |
457 | struct libustd_instance *instance; | |
458 | }; | |
459 | ||
460 | void *consumer_thread(void *arg) | |
461 | { | |
462 | struct buffer_info *buf; | |
463 | struct consumer_thread_args *args = (struct consumer_thread_args *) arg; | |
464 | int result; | |
465 | sigset_t sigset; | |
466 | ||
467 | DBG("GOT ARGS: pid %d bufname %s", args->pid, args->bufname); | |
468 | ||
469 | if(args->instance->callbacks->on_new_thread) | |
470 | args->instance->callbacks->on_new_thread(args->instance->callbacks); | |
471 | ||
472 | /* Block signals that should be handled by the main thread. */ | |
473 | result = sigemptyset(&sigset); | |
474 | if(result == -1) { | |
475 | PERROR("sigemptyset"); | |
476 | goto end; | |
477 | } | |
478 | result = sigaddset(&sigset, SIGTERM); | |
479 | if(result == -1) { | |
480 | PERROR("sigaddset"); | |
481 | goto end; | |
482 | } | |
483 | result = sigaddset(&sigset, SIGINT); | |
484 | if(result == -1) { | |
485 | PERROR("sigaddset"); | |
486 | goto end; | |
487 | } | |
488 | result = sigprocmask(SIG_BLOCK, &sigset, NULL); | |
489 | if(result == -1) { | |
490 | PERROR("sigprocmask"); | |
491 | goto end; | |
492 | } | |
493 | ||
494 | buf = connect_buffer(args->instance, args->pid, args->bufname); | |
495 | if(buf == NULL) { | |
496 | ERR("failed to connect to buffer"); | |
497 | goto end; | |
498 | } | |
499 | ||
500 | consumer_loop(args->instance, buf); | |
501 | ||
502 | destroy_buffer(args->instance->callbacks, buf); | |
503 | ||
504 | end: | |
505 | ||
506 | if(args->instance->callbacks->on_close_thread) | |
507 | args->instance->callbacks->on_close_thread(args->instance->callbacks); | |
508 | ||
509 | free((void *)args->bufname); | |
510 | free(args); | |
511 | return NULL; | |
512 | } | |
513 | ||
514 | int start_consuming_buffer( | |
515 | struct libustd_instance *instance, pid_t pid, const char *bufname) | |
516 | { | |
517 | pthread_t thr; | |
518 | struct consumer_thread_args *args; | |
519 | int result; | |
520 | ||
521 | DBG("beginning of start_consuming_buffer: args: pid %d bufname %s", pid, bufname); | |
522 | ||
7032c7d3 | 523 | args = (struct consumer_thread_args *) zmalloc(sizeof(struct consumer_thread_args)); |
d159ac37 AH |
524 | |
525 | args->pid = pid; | |
526 | args->bufname = strdup(bufname); | |
527 | args->instance = instance; | |
528 | DBG("beginning2 of start_consuming_buffer: args: pid %d bufname %s", args->pid, args->bufname); | |
529 | ||
530 | result = pthread_create(&thr, NULL, consumer_thread, args); | |
531 | if(result == -1) { | |
532 | ERR("pthread_create failed"); | |
533 | return -1; | |
534 | } | |
535 | result = pthread_detach(thr); | |
536 | if(result == -1) { | |
537 | ERR("pthread_detach failed"); | |
538 | return -1; | |
539 | } | |
540 | DBG("end of start_consuming_buffer: args: pid %d bufname %s", args->pid, args->bufname); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | int libustd_start_instance(struct libustd_instance *instance) | |
546 | { | |
547 | int result; | |
548 | int timeout = -1; | |
549 | ||
550 | if(!instance->is_init) { | |
551 | ERR("libustd instance not initialized"); | |
552 | return 1; | |
553 | } | |
554 | ||
555 | /* app loop */ | |
556 | for(;;) { | |
557 | char *recvbuf; | |
558 | ||
559 | /* check for requests on our public socket */ | |
f3f8cc91 | 560 | result = ustcomm_ustd_recv_message(instance->comm, &recvbuf, NULL, timeout); |
d159ac37 AH |
561 | if(result == -1 && errno == EINTR) { |
562 | /* Caught signal */ | |
563 | } | |
564 | else if(result == -1) { | |
565 | ERR("error in ustcomm_ustd_recv_message"); | |
566 | goto loop_end; | |
567 | } | |
568 | else if(result > 0) { | |
569 | if(!strncmp(recvbuf, "collect", 7)) { | |
570 | pid_t pid; | |
571 | char *bufname; | |
572 | int result; | |
573 | ||
574 | result = sscanf(recvbuf, "%*s %d %50as", &pid, &bufname); | |
575 | if(result != 2) { | |
576 | ERR("parsing error: %s", recvbuf); | |
577 | goto free_bufname; | |
578 | } | |
579 | ||
580 | result = start_consuming_buffer(instance, pid, bufname); | |
581 | if(result < 0) { | |
582 | ERR("error in add_buffer"); | |
583 | goto free_bufname; | |
584 | } | |
585 | ||
586 | free_bufname: | |
587 | free(bufname); | |
588 | } | |
589 | else if(!strncmp(recvbuf, "exit", 4)) { | |
590 | /* Only there to force poll to return */ | |
591 | } | |
592 | else { | |
593 | WARN("unknown command: %s", recvbuf); | |
594 | } | |
595 | ||
596 | free(recvbuf); | |
597 | } | |
598 | ||
599 | loop_end: | |
600 | ||
601 | if(instance->quit_program) { | |
602 | pthread_mutex_lock(&instance->mutex); | |
603 | if(instance->active_buffers == 0) { | |
604 | pthread_mutex_unlock(&instance->mutex); | |
605 | break; | |
606 | } | |
607 | pthread_mutex_unlock(&instance->mutex); | |
608 | timeout = 100; | |
609 | } | |
610 | } | |
611 | ||
612 | if(instance->callbacks->on_trace_end) | |
613 | instance->callbacks->on_trace_end(instance); | |
614 | ||
615 | libustd_delete_instance(instance); | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | void libustd_delete_instance(struct libustd_instance *instance) | |
621 | { | |
622 | if(instance->is_init) | |
f3f8cc91 | 623 | ustcomm_fini_ustd(instance->comm); |
d159ac37 AH |
624 | |
625 | pthread_mutex_destroy(&instance->mutex); | |
626 | free(instance->sock_path); | |
f3f8cc91 | 627 | free(instance->comm); |
d159ac37 AH |
628 | free(instance); |
629 | } | |
630 | ||
631 | int libustd_stop_instance(struct libustd_instance *instance, int send_msg) | |
632 | { | |
633 | int result; | |
634 | int fd; | |
635 | int bytes = 0; | |
636 | ||
637 | char msg[] = "exit"; | |
638 | ||
639 | instance->quit_program = 1; | |
640 | ||
641 | if(!send_msg) | |
642 | return 0; | |
643 | ||
644 | /* Send a message through the socket to force poll to return */ | |
645 | ||
646 | struct sockaddr_un addr; | |
647 | ||
648 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
649 | if(result == -1) { | |
650 | PERROR("socket"); | |
651 | return 1; | |
652 | } | |
653 | ||
654 | addr.sun_family = AF_UNIX; | |
655 | ||
656 | strncpy(addr.sun_path, instance->sock_path, UNIX_PATH_MAX); | |
657 | addr.sun_path[UNIX_PATH_MAX-1] = '\0'; | |
658 | ||
659 | result = connect(fd, (struct sockaddr *)&addr, sizeof(addr)); | |
660 | if(result == -1) { | |
661 | PERROR("connect"); | |
662 | } | |
663 | ||
664 | while(bytes != sizeof(msg)) | |
665 | bytes += send(fd, msg, sizeof(msg), 0); | |
666 | ||
667 | close(fd); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | struct libustd_instance *libustd_new_instance( | |
673 | struct libustd_callbacks *callbacks, char *sock_path) | |
674 | { | |
675 | struct libustd_instance *instance = | |
7032c7d3 | 676 | zmalloc(sizeof(struct libustd_instance)); |
d159ac37 AH |
677 | if(!instance) |
678 | return NULL; | |
679 | ||
f3f8cc91 AH |
680 | instance->comm = malloc(sizeof(struct ustcomm_ustd)); |
681 | if(!instance->comm) { | |
682 | free(instance); | |
683 | return NULL; | |
684 | } | |
685 | ||
d159ac37 AH |
686 | instance->callbacks = callbacks; |
687 | instance->quit_program = 0; | |
688 | instance->is_init = 0; | |
689 | instance->active_buffers = 0; | |
690 | pthread_mutex_init(&instance->mutex, NULL); | |
691 | ||
692 | if(sock_path) | |
693 | instance->sock_path = strdup(sock_path); | |
694 | else | |
695 | instance->sock_path = NULL; | |
696 | ||
697 | return instance; | |
698 | } | |
699 | ||
700 | int libustd_init_instance(struct libustd_instance *instance) | |
701 | { | |
702 | int result; | |
f3f8cc91 | 703 | result = ustcomm_init_ustd(instance->comm, instance->sock_path); |
d159ac37 AH |
704 | if(result == -1) { |
705 | ERR("failed to initialize socket"); | |
706 | return 1; | |
707 | } | |
708 | instance->is_init = 1; | |
709 | return 0; | |
710 | } | |
711 |