Commit | Line | Data |
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c39c72ee PMF |
1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * | |
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. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
12 | * | |
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 | |
16 | */ | |
17 | ||
d0b5f2b9 | 18 | #define _GNU_SOURCE |
f9e5ce61 PMF |
19 | #include <sys/types.h> |
20 | #include <signal.h> | |
21 | #include <errno.h> | |
22 | #include <sys/socket.h> | |
23 | #include <sys/un.h> | |
d0b5f2b9 | 24 | #include <unistd.h> |
aca1ad90 | 25 | #include <poll.h> |
803a4f58 | 26 | #include <sys/stat.h> |
f9e5ce61 PMF |
27 | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
d0b5f2b9 | 30 | #include <string.h> |
b0540e11 | 31 | #include <execinfo.h> |
d0b5f2b9 PMF |
32 | |
33 | #include "ustcomm.h" | |
6af64c43 | 34 | #include "usterr.h" |
2dae156b | 35 | #include "share.h" |
f9e5ce61 PMF |
36 | |
37 | #define UNIX_PATH_MAX 108 | |
f9e5ce61 | 38 | |
058a68cb | 39 | #define MSG_MAX 10000 |
d0b5f2b9 | 40 | |
aca1ad90 PMF |
41 | /* FIXME: ustcomm blocks on message sending, which might be problematic in |
42 | * some cases. Fix the poll() usage so sends are buffered until they don't | |
43 | * block. | |
44 | */ | |
45 | ||
3847c3ba PMF |
46 | //static void bt(void) |
47 | //{ | |
48 | // void *buffer[100]; | |
49 | // int result; | |
50 | // | |
51 | // result = backtrace(&buffer, 100); | |
52 | // backtrace_symbols_fd(buffer, result, STDERR_FILENO); | |
53 | //} | |
b0540e11 | 54 | |
688760ef PMF |
55 | char *strdup_malloc(const char *s) |
56 | { | |
57 | char *retval; | |
58 | ||
59 | if(s == NULL) | |
60 | return NULL; | |
61 | ||
62 | retval = (char *) malloc(strlen(s)+1); | |
63 | ||
64 | strcpy(retval, s); | |
65 | ||
66 | return retval; | |
67 | } | |
68 | ||
52c51a47 | 69 | static int signal_process(pid_t pid) |
f9e5ce61 | 70 | { |
52c51a47 | 71 | return 0; |
f9e5ce61 PMF |
72 | } |
73 | ||
ab33e65c | 74 | int pid_is_online(pid_t pid) { |
2944a629 | 75 | return 1; |
ab33e65c PP |
76 | } |
77 | ||
2dae156b PMF |
78 | /* Send a message |
79 | * | |
80 | * @fd: file descriptor to send to | |
81 | * @msg: a null-terminated string containing the message to send | |
82 | * | |
83 | * Return value: | |
84 | * -1: error | |
85 | * 0: connection closed | |
86 | * 1: success | |
87 | */ | |
88 | ||
4e2a8808 | 89 | static int send_message_fd(int fd, const char *msg) |
811e4b93 PMF |
90 | { |
91 | int result; | |
92 | ||
2dae156b PMF |
93 | /* Send including the final \0 */ |
94 | result = patient_send(fd, msg, strlen(msg)+1, MSG_NOSIGNAL); | |
811e4b93 | 95 | if(result == -1) { |
2dae156b PMF |
96 | if(errno != EPIPE) |
97 | PERROR("send"); | |
811e4b93 PMF |
98 | return -1; |
99 | } | |
688760ef PMF |
100 | else if(result == 0) { |
101 | return 0; | |
102 | } | |
811e4b93 | 103 | |
2dae156b | 104 | DBG("sent message \"%s\"", msg); |
688760ef | 105 | return 1; |
811e4b93 PMF |
106 | } |
107 | ||
b0540e11 PMF |
108 | /* Called by an app to ask the consumer daemon to connect to it. */ |
109 | ||
110 | int ustcomm_request_consumer(pid_t pid, const char *channel) | |
111 | { | |
112 | char path[UNIX_PATH_MAX]; | |
113 | int result; | |
08230db7 PMF |
114 | char *msg=NULL; |
115 | int retval = 0; | |
116 | struct ustcomm_connection conn; | |
c97d4437 PMF |
117 | char *explicit_daemon_socket_path; |
118 | ||
119 | explicit_daemon_socket_path = getenv("UST_DAEMON_SOCKET"); | |
120 | if(explicit_daemon_socket_path) { | |
121 | /* user specified explicitly a socket path */ | |
122 | result = snprintf(path, UNIX_PATH_MAX, "%s", explicit_daemon_socket_path); | |
123 | } | |
124 | else { | |
125 | /* just use the default path */ | |
126 | result = snprintf(path, UNIX_PATH_MAX, "%s/ustd", SOCK_DIR); | |
127 | } | |
b0540e11 | 128 | |
b0540e11 | 129 | if(result >= UNIX_PATH_MAX) { |
08230db7 | 130 | ERR("string overflow allocating socket name"); |
b0540e11 PMF |
131 | return -1; |
132 | } | |
133 | ||
134 | asprintf(&msg, "collect %d %s", pid, channel); | |
135 | ||
08230db7 PMF |
136 | /* don't signal it because it's the daemon */ |
137 | result = ustcomm_connect_path(path, &conn, -1); | |
138 | if(result == -1) { | |
139 | WARN("ustcomm_connect_path failed"); | |
140 | retval = -1; | |
141 | goto del_string; | |
142 | } | |
143 | ||
144 | result = ustcomm_send_request(&conn, msg, NULL); | |
145 | if(result == -1) { | |
146 | WARN("ustcomm_send_request failed"); | |
147 | retval = -1; | |
148 | goto disconnect; | |
149 | } | |
150 | ||
151 | disconnect: | |
152 | ustcomm_disconnect(&conn); | |
153 | del_string: | |
b0540e11 PMF |
154 | free(msg); |
155 | ||
08230db7 | 156 | return retval; |
b0540e11 PMF |
157 | } |
158 | ||
688760ef PMF |
159 | /* returns 1 to indicate a message was received |
160 | * returns 0 to indicate no message was received (cannot happen) | |
161 | * returns -1 to indicate an error | |
162 | */ | |
811e4b93 | 163 | |
2dae156b PMF |
164 | #define RECV_INCREMENT 1 |
165 | ||
166 | static int recv_message_fd(int fd, char **msg) | |
d0b5f2b9 | 167 | { |
d0b5f2b9 | 168 | int result; |
2dae156b PMF |
169 | int buf_alloc_size = 0; |
170 | char *buf = NULL; | |
171 | int buf_used_size = 0; | |
d0b5f2b9 | 172 | |
2dae156b PMF |
173 | buf = malloc(10); |
174 | buf_alloc_size = 16; | |
b02e31e5 | 175 | |
2dae156b PMF |
176 | for(;;) { |
177 | if(buf_used_size + RECV_INCREMENT > buf_alloc_size) { | |
178 | buf_alloc_size *= 2; | |
179 | buf = (char *) realloc(buf, buf_alloc_size); | |
180 | } | |
b0540e11 | 181 | |
2dae156b PMF |
182 | /* FIXME: this is really inefficient; but with count>1 we would |
183 | * need a buffering mechanism */ | |
184 | result = recv(fd, buf+buf_used_size, RECV_INCREMENT, 0); | |
185 | if(result == -1) { | |
186 | free(buf); | |
187 | if(errno != ECONNRESET) | |
188 | PERROR("recv"); | |
189 | return -1; | |
190 | } | |
191 | if(result == 0) { | |
192 | if(buf_used_size) | |
193 | goto ret; | |
194 | else { | |
195 | free(buf); | |
196 | return 0; | |
197 | } | |
198 | } | |
199 | ||
200 | ||
201 | buf_used_size += result; | |
202 | ||
203 | if(buf[buf_used_size-1] == 0) { | |
204 | goto ret; | |
205 | } | |
206 | } | |
b0540e11 | 207 | |
2dae156b PMF |
208 | ret: |
209 | *msg = buf; | |
210 | DBG("received message \"%s\"", buf); | |
811e4b93 | 211 | |
688760ef | 212 | return 1; |
2dae156b | 213 | |
d0b5f2b9 PMF |
214 | } |
215 | ||
811e4b93 PMF |
216 | int ustcomm_send_reply(struct ustcomm_server *server, char *msg, struct ustcomm_source *src) |
217 | { | |
218 | int result; | |
219 | ||
4e2a8808 | 220 | result = send_message_fd(src->fd, msg); |
3a7b90de | 221 | if(result < 0) { |
811e4b93 PMF |
222 | ERR("error in send_message_fd"); |
223 | return -1; | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
99b72dc0 PMF |
229 | /* Called after a fork. */ |
230 | ||
231 | int ustcomm_close_all_connections(struct ustcomm_server *server) | |
232 | { | |
233 | struct ustcomm_connection *conn; | |
234 | struct ustcomm_connection *deletable_conn = NULL; | |
235 | ||
236 | list_for_each_entry(conn, &server->connections, list) { | |
237 | free(deletable_conn); | |
238 | deletable_conn = conn; | |
239 | close(conn->fd); | |
240 | list_del(&conn->list); | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
688760ef PMF |
246 | /* @timeout: max blocking time in milliseconds, -1 means infinity |
247 | * | |
248 | * returns 1 to indicate a message was received | |
249 | * returns 0 to indicate no message was received | |
250 | * returns -1 to indicate an error | |
251 | */ | |
252 | ||
253 | int ustcomm_recv_message(struct ustcomm_server *server, char **msg, struct ustcomm_source *src, int timeout) | |
b0540e11 | 254 | { |
aca1ad90 PMF |
255 | struct pollfd *fds; |
256 | struct ustcomm_connection *conn; | |
257 | int result; | |
258 | int retval; | |
259 | ||
260 | for(;;) { | |
261 | int idx = 0; | |
262 | int n_fds = 1; | |
263 | ||
811e4b93 | 264 | list_for_each_entry(conn, &server->connections, list) { |
aca1ad90 PMF |
265 | n_fds++; |
266 | } | |
267 | ||
268 | fds = (struct pollfd *) malloc(n_fds * sizeof(struct pollfd)); | |
269 | if(fds == NULL) { | |
270 | ERR("malloc returned NULL"); | |
271 | return -1; | |
272 | } | |
273 | ||
274 | /* special idx 0 is for listening socket */ | |
811e4b93 | 275 | fds[idx].fd = server->listen_fd; |
aca1ad90 PMF |
276 | fds[idx].events = POLLIN; |
277 | idx++; | |
278 | ||
811e4b93 | 279 | list_for_each_entry(conn, &server->connections, list) { |
aca1ad90 PMF |
280 | fds[idx].fd = conn->fd; |
281 | fds[idx].events = POLLIN; | |
282 | idx++; | |
283 | } | |
284 | ||
69ba0156 PMF |
285 | while((result = poll(fds, n_fds, timeout)) == -1 && errno == EINTR) |
286 | /* nothing */; | |
aca1ad90 PMF |
287 | if(result == -1) { |
288 | PERROR("poll"); | |
289 | return -1; | |
290 | } | |
291 | ||
688760ef PMF |
292 | if(result == 0) |
293 | return 0; | |
294 | ||
aca1ad90 PMF |
295 | if(fds[0].revents) { |
296 | struct ustcomm_connection *newconn; | |
297 | int newfd; | |
298 | ||
811e4b93 | 299 | result = newfd = accept(server->listen_fd, NULL, NULL); |
aca1ad90 PMF |
300 | if(result == -1) { |
301 | PERROR("accept"); | |
302 | return -1; | |
303 | } | |
304 | ||
305 | newconn = (struct ustcomm_connection *) malloc(sizeof(struct ustcomm_connection)); | |
306 | if(newconn == NULL) { | |
307 | ERR("malloc returned NULL"); | |
308 | return -1; | |
309 | } | |
310 | ||
311 | newconn->fd = newfd; | |
312 | ||
811e4b93 | 313 | list_add(&newconn->list, &server->connections); |
aca1ad90 PMF |
314 | } |
315 | ||
316 | for(idx=1; idx<n_fds; idx++) { | |
317 | if(fds[idx].revents) { | |
2dae156b PMF |
318 | retval = recv_message_fd(fds[idx].fd, msg); |
319 | if(src) | |
320 | src->fd = fds[idx].fd; | |
321 | ||
aca1ad90 PMF |
322 | if(**msg == 0) { |
323 | /* connection finished */ | |
324 | close(fds[idx].fd); | |
325 | ||
811e4b93 | 326 | list_for_each_entry(conn, &server->connections, list) { |
aca1ad90 PMF |
327 | if(conn->fd == fds[idx].fd) { |
328 | list_del(&conn->list); | |
329 | break; | |
330 | } | |
331 | } | |
332 | } | |
333 | else { | |
334 | goto free_fds_return; | |
335 | } | |
336 | } | |
337 | } | |
338 | ||
339 | free(fds); | |
340 | } | |
341 | ||
342 | free_fds_return: | |
343 | free(fds); | |
344 | return retval; | |
b0540e11 PMF |
345 | } |
346 | ||
688760ef | 347 | int ustcomm_ustd_recv_message(struct ustcomm_ustd *ustd, char **msg, struct ustcomm_source *src, int timeout) |
811e4b93 | 348 | { |
688760ef | 349 | return ustcomm_recv_message(&ustd->server, msg, src, timeout); |
811e4b93 PMF |
350 | } |
351 | ||
688760ef | 352 | int ustcomm_app_recv_message(struct ustcomm_app *app, char **msg, struct ustcomm_source *src, int timeout) |
b0540e11 | 353 | { |
688760ef | 354 | return ustcomm_recv_message(&app->server, msg, src, timeout); |
b0540e11 PMF |
355 | } |
356 | ||
46ef48cd PMF |
357 | /* This removes src from the list of active connections of app. |
358 | */ | |
359 | ||
360 | int ustcomm_app_detach_client(struct ustcomm_app *app, struct ustcomm_source *src) | |
361 | { | |
362 | struct ustcomm_server *server = (struct ustcomm_server *)app; | |
363 | struct ustcomm_connection *conn; | |
364 | ||
365 | list_for_each_entry(conn, &server->connections, list) { | |
366 | if(conn->fd == src->fd) { | |
367 | list_del(&conn->list); | |
368 | goto found; | |
369 | } | |
370 | } | |
371 | ||
372 | return -1; | |
373 | found: | |
374 | return src->fd; | |
375 | } | |
376 | ||
08230db7 | 377 | static int init_named_socket(const char *name, char **path_out) |
d0b5f2b9 PMF |
378 | { |
379 | int result; | |
380 | int fd; | |
381 | ||
382 | struct sockaddr_un addr; | |
383 | ||
aca1ad90 | 384 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); |
d0b5f2b9 PMF |
385 | if(result == -1) { |
386 | PERROR("socket"); | |
387 | return -1; | |
388 | } | |
389 | ||
390 | addr.sun_family = AF_UNIX; | |
391 | ||
392 | strncpy(addr.sun_path, name, UNIX_PATH_MAX); | |
393 | addr.sun_path[UNIX_PATH_MAX-1] = '\0'; | |
394 | ||
aca1ad90 PMF |
395 | result = access(name, F_OK); |
396 | if(result == 0) { | |
397 | /* file exists */ | |
398 | result = unlink(name); | |
399 | if(result == -1) { | |
400 | PERROR("unlink of socket file"); | |
401 | goto close_sock; | |
402 | } | |
403 | WARN("socket already exists; overwriting"); | |
404 | } | |
405 | ||
d0b5f2b9 PMF |
406 | result = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); |
407 | if(result == -1) { | |
408 | PERROR("bind"); | |
409 | goto close_sock; | |
410 | } | |
411 | ||
aca1ad90 PMF |
412 | result = listen(fd, 1); |
413 | if(result == -1) { | |
414 | PERROR("listen"); | |
415 | goto close_sock; | |
416 | } | |
417 | ||
b0540e11 | 418 | if(path_out) { |
803a4f58 | 419 | *path_out = strdup(addr.sun_path); |
b0540e11 | 420 | } |
d0b5f2b9 PMF |
421 | |
422 | return fd; | |
423 | ||
424 | close_sock: | |
425 | close(fd); | |
426 | ||
427 | return -1; | |
428 | } | |
429 | ||
34b460e6 PMF |
430 | /* |
431 | * Return value: | |
432 | * 0: Success, but no reply because recv() returned 0 | |
433 | * 1: Success | |
434 | * -1: Error | |
435 | * | |
436 | * On error, the error message is printed, except on | |
437 | * ECONNRESET, which is normal when the application dies. | |
438 | */ | |
439 | ||
772030fe | 440 | int ustcomm_send_request(struct ustcomm_connection *conn, const char *req, char **reply) |
4e2a8808 PMF |
441 | { |
442 | int result; | |
443 | ||
2dae156b PMF |
444 | /* Send including the final \0 */ |
445 | result = send_message_fd(conn->fd, req); | |
446 | if(result != 1) | |
447 | return result; | |
4e2a8808 PMF |
448 | |
449 | if(!reply) | |
450 | return 1; | |
451 | ||
2dae156b | 452 | result = recv_message_fd(conn->fd, reply); |
4e2a8808 | 453 | if(result == -1) { |
4e2a8808 PMF |
454 | return -1; |
455 | } | |
456 | else if(result == 0) { | |
457 | return 0; | |
458 | } | |
459 | ||
4e2a8808 PMF |
460 | return 1; |
461 | } | |
462 | ||
08230db7 | 463 | int ustcomm_connect_path(const char *path, struct ustcomm_connection *conn, pid_t signalpid) |
4e2a8808 PMF |
464 | { |
465 | int fd; | |
466 | int result; | |
467 | struct sockaddr_un addr; | |
468 | ||
469 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
470 | if(result == -1) { | |
471 | PERROR("socket"); | |
472 | return -1; | |
473 | } | |
474 | ||
475 | addr.sun_family = AF_UNIX; | |
476 | ||
477 | result = snprintf(addr.sun_path, UNIX_PATH_MAX, "%s", path); | |
478 | if(result >= UNIX_PATH_MAX) { | |
479 | ERR("string overflow allocating socket name"); | |
480 | return -1; | |
481 | } | |
482 | ||
52c51a47 PMF |
483 | if(signalpid >= 0) { |
484 | result = signal_process(signalpid); | |
485 | if(result == -1) { | |
486 | ERR("could not signal process"); | |
487 | return -1; | |
488 | } | |
489 | } | |
4e2a8808 PMF |
490 | |
491 | result = connect(fd, (struct sockaddr *)&addr, sizeof(addr)); | |
492 | if(result == -1) { | |
2dae156b | 493 | PERROR("connect (path=%s)", path); |
4e2a8808 PMF |
494 | return -1; |
495 | } | |
496 | ||
497 | conn->fd = fd; | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | int ustcomm_disconnect(struct ustcomm_connection *conn) | |
503 | { | |
504 | return close(conn->fd); | |
505 | } | |
506 | ||
507 | int ustcomm_connect_app(pid_t pid, struct ustcomm_connection *conn) | |
508 | { | |
509 | int result; | |
510 | char path[UNIX_PATH_MAX]; | |
511 | ||
512 | ||
513 | result = snprintf(path, UNIX_PATH_MAX, "%s/%d", SOCK_DIR, pid); | |
514 | if(result >= UNIX_PATH_MAX) { | |
08230db7 | 515 | ERR("string overflow allocating socket name"); |
4e2a8808 PMF |
516 | return -1; |
517 | } | |
518 | ||
519 | return ustcomm_connect_path(path, conn, pid); | |
520 | } | |
521 | ||
dce0b474 PMF |
522 | static int ensure_dir_exists(const char *dir) |
523 | { | |
524 | struct stat st; | |
525 | int result; | |
526 | ||
527 | if(!strcmp(dir, "")) | |
528 | return -1; | |
529 | ||
530 | result = stat(dir, &st); | |
531 | if(result == -1 && errno != ENOENT) { | |
532 | return -1; | |
533 | } | |
534 | else if(result == -1) { | |
535 | /* ENOENT */ | |
536 | char buf[200]; | |
537 | int result; | |
538 | ||
539 | result = snprintf(buf, sizeof(buf), "mkdir -p \"%s\"", dir); | |
540 | if(result >= sizeof(buf)) { | |
541 | ERR("snprintf buffer overflow"); | |
542 | return -1; | |
543 | } | |
544 | result = system(buf); | |
545 | if(result != 0) { | |
546 | ERR("executing command %s", buf); | |
547 | return -1; | |
548 | } | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
08230db7 PMF |
554 | /* Called by an application to initialize its server so daemons can |
555 | * connect to it. | |
556 | */ | |
4e2a8808 | 557 | |
d0b5f2b9 PMF |
558 | int ustcomm_init_app(pid_t pid, struct ustcomm_app *handle) |
559 | { | |
560 | int result; | |
561 | char *name; | |
562 | ||
563 | result = asprintf(&name, "%s/%d", SOCK_DIR, (int)pid); | |
564 | if(result >= UNIX_PATH_MAX) { | |
565 | ERR("string overflow allocating socket name"); | |
566 | return -1; | |
567 | } | |
568 | ||
dce0b474 PMF |
569 | result = ensure_dir_exists(SOCK_DIR); |
570 | if(result == -1) { | |
571 | ERR("Unable to create socket directory %s", SOCK_DIR); | |
572 | return -1; | |
573 | } | |
574 | ||
811e4b93 PMF |
575 | handle->server.listen_fd = init_named_socket(name, &(handle->server.socketpath)); |
576 | if(handle->server.listen_fd < 0) { | |
68ab7a5d | 577 | ERR("Error initializing named socket (%s). Check that directory exists and that it is writable.", name); |
d0b5f2b9 PMF |
578 | goto free_name; |
579 | } | |
580 | free(name); | |
581 | ||
811e4b93 | 582 | INIT_LIST_HEAD(&handle->server.connections); |
aca1ad90 | 583 | |
d0b5f2b9 PMF |
584 | return 0; |
585 | ||
586 | free_name: | |
587 | free(name); | |
588 | return -1; | |
589 | } | |
590 | ||
08230db7 PMF |
591 | /* Used by the daemon to initialize its server so applications |
592 | * can connect to it. | |
593 | */ | |
594 | ||
c97d4437 | 595 | int ustcomm_init_ustd(struct ustcomm_ustd *handle, const char *sock_path) |
d0b5f2b9 | 596 | { |
3847c3ba | 597 | char *name; |
c97d4437 | 598 | int retval = 0; |
3847c3ba | 599 | |
c97d4437 PMF |
600 | if(sock_path) { |
601 | asprintf(&name, "%s", sock_path); | |
602 | } | |
603 | else { | |
dce0b474 PMF |
604 | int result; |
605 | ||
606 | /* Only check if socket dir exists if we are using the default directory */ | |
607 | result = ensure_dir_exists(SOCK_DIR); | |
608 | if(result == -1) { | |
609 | ERR("Unable to create socket directory %s", SOCK_DIR); | |
610 | return -1; | |
611 | } | |
612 | ||
c97d4437 | 613 | asprintf(&name, "%s/%s", SOCK_DIR, "ustd"); |
3847c3ba PMF |
614 | } |
615 | ||
811e4b93 PMF |
616 | handle->server.listen_fd = init_named_socket(name, &handle->server.socketpath); |
617 | if(handle->server.listen_fd < 0) { | |
6cb88bc0 | 618 | ERR("error initializing named socket at %s", name); |
c97d4437 | 619 | retval = -1; |
aca1ad90 PMF |
620 | goto free_name; |
621 | } | |
d0b5f2b9 | 622 | |
811e4b93 | 623 | INIT_LIST_HEAD(&handle->server.connections); |
aca1ad90 | 624 | |
aca1ad90 PMF |
625 | free_name: |
626 | free(name); | |
c97d4437 PMF |
627 | |
628 | return retval; | |
d0b5f2b9 | 629 | } |
b02e31e5 | 630 | |
803a4f58 PMF |
631 | void ustcomm_fini_app(struct ustcomm_app *handle) |
632 | { | |
633 | int result; | |
634 | struct stat st; | |
635 | ||
636 | /* Destroy socket */ | |
803a4f58 PMF |
637 | result = stat(handle->server.socketpath, &st); |
638 | if(result == -1) { | |
639 | PERROR("stat (%s)", handle->server.socketpath); | |
640 | return; | |
641 | } | |
642 | ||
643 | /* Paranoid check before deleting. */ | |
644 | result = S_ISSOCK(st.st_mode); | |
645 | if(!result) { | |
646 | ERR("The socket we are about to delete is not a socket."); | |
647 | return; | |
648 | } | |
649 | ||
650 | result = unlink(handle->server.socketpath); | |
651 | if(result == -1) { | |
652 | PERROR("unlink"); | |
653 | } | |
654 | } | |
655 | ||
7e92827d | 656 | static const char *find_tok(const char *str) |
b02e31e5 PMF |
657 | { |
658 | while(*str == ' ') { | |
659 | str++; | |
660 | ||
661 | if(*str == 0) | |
662 | return NULL; | |
663 | } | |
664 | ||
665 | return str; | |
666 | } | |
667 | ||
7e92827d | 668 | static const char *find_sep(const char *str) |
b02e31e5 PMF |
669 | { |
670 | while(*str != ' ') { | |
671 | str++; | |
672 | ||
673 | if(*str == 0) | |
674 | break; | |
675 | } | |
676 | ||
677 | return str; | |
678 | } | |
679 | ||
7e92827d | 680 | int nth_token_is(const char *str, const char *token, int tok_no) |
b02e31e5 PMF |
681 | { |
682 | int i; | |
7e92827d PMF |
683 | const char *start; |
684 | const char *end; | |
b02e31e5 PMF |
685 | |
686 | for(i=0; i<=tok_no; i++) { | |
687 | str = find_tok(str); | |
688 | if(str == NULL) | |
689 | return -1; | |
690 | ||
691 | start = str; | |
692 | ||
693 | str = find_sep(str); | |
694 | if(str == NULL) | |
695 | return -1; | |
696 | ||
697 | end = str; | |
698 | } | |
699 | ||
700 | if(end-start != strlen(token)) | |
701 | return 0; | |
702 | ||
703 | if(strncmp(start, token, end-start)) | |
704 | return 0; | |
705 | ||
706 | return 1; | |
707 | } | |
708 | ||
7e92827d | 709 | char *nth_token(const char *str, int tok_no) |
b02e31e5 PMF |
710 | { |
711 | static char *retval = NULL; | |
712 | int i; | |
7e92827d PMF |
713 | const char *start; |
714 | const char *end; | |
b02e31e5 PMF |
715 | |
716 | for(i=0; i<=tok_no; i++) { | |
717 | str = find_tok(str); | |
718 | if(str == NULL) | |
719 | return NULL; | |
720 | ||
721 | start = str; | |
722 | ||
723 | str = find_sep(str); | |
724 | if(str == NULL) | |
725 | return NULL; | |
726 | ||
727 | end = str; | |
728 | } | |
729 | ||
730 | if(retval) { | |
731 | free(retval); | |
732 | retval = NULL; | |
733 | } | |
734 | ||
aca1ad90 | 735 | asprintf(&retval, "%.*s", (int)(end-start), start); |
b02e31e5 PMF |
736 | |
737 | return retval; | |
738 | } | |
739 |