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> |
f9e5ce61 PMF |
26 | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
d0b5f2b9 | 29 | #include <string.h> |
b0540e11 | 30 | #include <execinfo.h> |
d0b5f2b9 PMF |
31 | |
32 | #include "ustcomm.h" | |
33 | #include "localerr.h" | |
f9e5ce61 PMF |
34 | |
35 | #define UNIX_PATH_MAX 108 | |
36 | #define SOCK_DIR "/tmp/socks" | |
37 | #define UST_SIGNAL SIGIO | |
38 | ||
d0b5f2b9 PMF |
39 | #define MSG_MAX 1000 |
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 PMF |
70 | { |
71 | int result; | |
72 | ||
73 | result = kill(pid, UST_SIGNAL); | |
74 | if(result == -1) { | |
b0540e11 | 75 | PERROR("kill"); |
52c51a47 | 76 | return -1; |
f9e5ce61 PMF |
77 | } |
78 | ||
3bb56863 | 79 | /* FIXME: should wait in a better way */ |
52c51a47 PMF |
80 | //sleep(1); |
81 | ||
82 | return 0; | |
f9e5ce61 PMF |
83 | } |
84 | ||
4e2a8808 | 85 | static int send_message_fd(int fd, const char *msg) |
811e4b93 PMF |
86 | { |
87 | int result; | |
88 | ||
89 | result = send(fd, msg, strlen(msg), 0); | |
90 | if(result == -1) { | |
91 | PERROR("send"); | |
92 | return -1; | |
93 | } | |
688760ef PMF |
94 | else if(result == 0) { |
95 | return 0; | |
96 | } | |
811e4b93 | 97 | |
688760ef | 98 | return 1; |
4e2a8808 PMF |
99 | |
100 | // *reply = (char *) malloc(MSG_MAX+1); | |
101 | // result = recv(fd, *reply, MSG_MAX, 0); | |
102 | // if(result == -1) { | |
103 | // PERROR("recv"); | |
104 | // return -1; | |
105 | // } | |
106 | // else if(result == 0) { | |
107 | // return 0; | |
108 | // } | |
109 | // | |
110 | // (*reply)[result] = '\0'; | |
111 | // | |
112 | // return 1; | |
811e4b93 PMF |
113 | } |
114 | ||
4e2a8808 | 115 | static int send_message_path(const char *path, const char *msg, int signalpid) |
f9e5ce61 PMF |
116 | { |
117 | int fd; | |
118 | int result; | |
119 | struct sockaddr_un addr; | |
f9e5ce61 | 120 | |
aca1ad90 | 121 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); |
f9e5ce61 | 122 | if(result == -1) { |
b0540e11 | 123 | PERROR("socket"); |
d0b5f2b9 | 124 | return -1; |
f9e5ce61 PMF |
125 | } |
126 | ||
127 | addr.sun_family = AF_UNIX; | |
128 | ||
b0540e11 | 129 | result = snprintf(addr.sun_path, UNIX_PATH_MAX, "%s", path); |
f9e5ce61 | 130 | if(result >= UNIX_PATH_MAX) { |
b0540e11 | 131 | ERR("string overflow allocating socket name"); |
d0b5f2b9 | 132 | return -1; |
f9e5ce61 PMF |
133 | } |
134 | ||
52c51a47 PMF |
135 | if(signalpid >= 0) { |
136 | result = signal_process(signalpid); | |
137 | if(result == -1) { | |
138 | ERR("could not signal process"); | |
139 | return -1; | |
140 | } | |
141 | } | |
f9e5ce61 | 142 | |
aca1ad90 | 143 | result = connect(fd, (struct sockaddr *)&addr, sizeof(addr)); |
f9e5ce61 | 144 | if(result == -1) { |
aca1ad90 PMF |
145 | PERROR("connect"); |
146 | return -1; | |
147 | } | |
148 | ||
4e2a8808 | 149 | return send_message_fd(fd, msg); |
f9e5ce61 PMF |
150 | } |
151 | ||
4e2a8808 PMF |
152 | ///* pid: the pid of the trace process that must receive the msg |
153 | // msg: pointer to a null-terminated message to send | |
154 | // reply: location where to put the null-terminated string of the reply; | |
155 | // it must be free'd after usage | |
156 | // */ | |
157 | // | |
158 | //int send_message_pid(pid_t pid, const char *msg, char **reply) | |
159 | //{ | |
160 | // int result; | |
161 | // char path[UNIX_PATH_MAX]; | |
162 | // | |
163 | // result = snprintf(path, UNIX_PATH_MAX, "%s/%d", SOCK_DIR, pid); | |
164 | // if(result >= UNIX_PATH_MAX) { | |
165 | // fprintf(stderr, "string overflow allocating socket name"); | |
166 | // return -1; | |
167 | // } | |
168 | // | |
169 | // send_message_path(path, msg, reply, pid); | |
170 | // | |
171 | // return 0; | |
172 | //} | |
b0540e11 PMF |
173 | |
174 | /* Called by an app to ask the consumer daemon to connect to it. */ | |
175 | ||
176 | int ustcomm_request_consumer(pid_t pid, const char *channel) | |
177 | { | |
178 | char path[UNIX_PATH_MAX]; | |
179 | int result; | |
180 | char *msg; | |
181 | ||
182 | result = snprintf(path, UNIX_PATH_MAX, "%s/ustd", SOCK_DIR); | |
183 | if(result >= UNIX_PATH_MAX) { | |
184 | fprintf(stderr, "string overflow allocating socket name"); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | asprintf(&msg, "collect %d %s", pid, channel); | |
189 | ||
4e2a8808 | 190 | send_message_path(path, msg, -1); |
b0540e11 PMF |
191 | free(msg); |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
688760ef PMF |
196 | /* returns 1 to indicate a message was received |
197 | * returns 0 to indicate no message was received (cannot happen) | |
198 | * returns -1 to indicate an error | |
199 | */ | |
811e4b93 | 200 | |
b02e31e5 | 201 | static int recv_message_fd(int fd, char **msg, struct ustcomm_source *src) |
d0b5f2b9 | 202 | { |
d0b5f2b9 | 203 | int result; |
d0b5f2b9 PMF |
204 | |
205 | *msg = (char *) malloc(MSG_MAX+1); | |
b02e31e5 | 206 | |
aca1ad90 | 207 | result = recv(fd, *msg, MSG_MAX, 0); |
d0b5f2b9 | 208 | if(result == -1) { |
688760ef | 209 | PERROR("recv"); |
d0b5f2b9 PMF |
210 | return -1; |
211 | } | |
b0540e11 | 212 | |
d0b5f2b9 | 213 | (*msg)[result] = '\0'; |
b0540e11 PMF |
214 | |
215 | DBG("ustcomm_app_recv_message: result is %d, message is %s", result, (*msg)); | |
216 | ||
811e4b93 PMF |
217 | if(src) |
218 | src->fd = fd; | |
219 | ||
688760ef | 220 | return 1; |
d0b5f2b9 PMF |
221 | } |
222 | ||
811e4b93 PMF |
223 | int ustcomm_send_reply(struct ustcomm_server *server, char *msg, struct ustcomm_source *src) |
224 | { | |
225 | int result; | |
226 | ||
4e2a8808 | 227 | result = send_message_fd(src->fd, msg); |
3a7b90de | 228 | if(result < 0) { |
811e4b93 PMF |
229 | ERR("error in send_message_fd"); |
230 | return -1; | |
231 | } | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
688760ef PMF |
236 | /* @timeout: max blocking time in milliseconds, -1 means infinity |
237 | * | |
238 | * returns 1 to indicate a message was received | |
239 | * returns 0 to indicate no message was received | |
240 | * returns -1 to indicate an error | |
241 | */ | |
242 | ||
243 | int ustcomm_recv_message(struct ustcomm_server *server, char **msg, struct ustcomm_source *src, int timeout) | |
b0540e11 | 244 | { |
aca1ad90 PMF |
245 | struct pollfd *fds; |
246 | struct ustcomm_connection *conn; | |
247 | int result; | |
248 | int retval; | |
249 | ||
250 | for(;;) { | |
251 | int idx = 0; | |
252 | int n_fds = 1; | |
253 | ||
811e4b93 | 254 | list_for_each_entry(conn, &server->connections, list) { |
aca1ad90 PMF |
255 | n_fds++; |
256 | } | |
257 | ||
258 | fds = (struct pollfd *) malloc(n_fds * sizeof(struct pollfd)); | |
259 | if(fds == NULL) { | |
260 | ERR("malloc returned NULL"); | |
261 | return -1; | |
262 | } | |
263 | ||
264 | /* special idx 0 is for listening socket */ | |
811e4b93 | 265 | fds[idx].fd = server->listen_fd; |
aca1ad90 PMF |
266 | fds[idx].events = POLLIN; |
267 | idx++; | |
268 | ||
811e4b93 | 269 | list_for_each_entry(conn, &server->connections, list) { |
aca1ad90 PMF |
270 | fds[idx].fd = conn->fd; |
271 | fds[idx].events = POLLIN; | |
272 | idx++; | |
273 | } | |
274 | ||
688760ef | 275 | result = poll(fds, n_fds, timeout); |
aca1ad90 PMF |
276 | if(result == -1) { |
277 | PERROR("poll"); | |
278 | return -1; | |
279 | } | |
280 | ||
688760ef PMF |
281 | if(result == 0) |
282 | return 0; | |
283 | ||
aca1ad90 PMF |
284 | if(fds[0].revents) { |
285 | struct ustcomm_connection *newconn; | |
286 | int newfd; | |
287 | ||
811e4b93 | 288 | result = newfd = accept(server->listen_fd, NULL, NULL); |
aca1ad90 PMF |
289 | if(result == -1) { |
290 | PERROR("accept"); | |
291 | return -1; | |
292 | } | |
293 | ||
294 | newconn = (struct ustcomm_connection *) malloc(sizeof(struct ustcomm_connection)); | |
295 | if(newconn == NULL) { | |
296 | ERR("malloc returned NULL"); | |
297 | return -1; | |
298 | } | |
299 | ||
300 | newconn->fd = newfd; | |
301 | ||
811e4b93 | 302 | list_add(&newconn->list, &server->connections); |
aca1ad90 PMF |
303 | } |
304 | ||
305 | for(idx=1; idx<n_fds; idx++) { | |
306 | if(fds[idx].revents) { | |
307 | retval = recv_message_fd(fds[idx].fd, msg, src); | |
308 | if(**msg == 0) { | |
309 | /* connection finished */ | |
310 | close(fds[idx].fd); | |
311 | ||
811e4b93 | 312 | list_for_each_entry(conn, &server->connections, list) { |
aca1ad90 PMF |
313 | if(conn->fd == fds[idx].fd) { |
314 | list_del(&conn->list); | |
315 | break; | |
316 | } | |
317 | } | |
318 | } | |
319 | else { | |
320 | goto free_fds_return; | |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | free(fds); | |
326 | } | |
327 | ||
328 | free_fds_return: | |
329 | free(fds); | |
330 | return retval; | |
b0540e11 PMF |
331 | } |
332 | ||
688760ef | 333 | int ustcomm_ustd_recv_message(struct ustcomm_ustd *ustd, char **msg, struct ustcomm_source *src, int timeout) |
811e4b93 | 334 | { |
688760ef | 335 | return ustcomm_recv_message(&ustd->server, msg, src, timeout); |
811e4b93 PMF |
336 | } |
337 | ||
688760ef | 338 | int ustcomm_app_recv_message(struct ustcomm_app *app, char **msg, struct ustcomm_source *src, int timeout) |
b0540e11 | 339 | { |
688760ef | 340 | return ustcomm_recv_message(&app->server, msg, src, timeout); |
b0540e11 PMF |
341 | } |
342 | ||
46ef48cd PMF |
343 | /* This removes src from the list of active connections of app. |
344 | */ | |
345 | ||
346 | int ustcomm_app_detach_client(struct ustcomm_app *app, struct ustcomm_source *src) | |
347 | { | |
348 | struct ustcomm_server *server = (struct ustcomm_server *)app; | |
349 | struct ustcomm_connection *conn; | |
350 | ||
351 | list_for_each_entry(conn, &server->connections, list) { | |
352 | if(conn->fd == src->fd) { | |
353 | list_del(&conn->list); | |
354 | goto found; | |
355 | } | |
356 | } | |
357 | ||
358 | return -1; | |
359 | found: | |
360 | return src->fd; | |
361 | } | |
362 | ||
d0b5f2b9 PMF |
363 | static int init_named_socket(char *name, char **path_out) |
364 | { | |
365 | int result; | |
366 | int fd; | |
367 | ||
368 | struct sockaddr_un addr; | |
369 | ||
aca1ad90 | 370 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); |
d0b5f2b9 PMF |
371 | if(result == -1) { |
372 | PERROR("socket"); | |
373 | return -1; | |
374 | } | |
375 | ||
376 | addr.sun_family = AF_UNIX; | |
377 | ||
378 | strncpy(addr.sun_path, name, UNIX_PATH_MAX); | |
379 | addr.sun_path[UNIX_PATH_MAX-1] = '\0'; | |
380 | ||
aca1ad90 PMF |
381 | result = access(name, F_OK); |
382 | if(result == 0) { | |
383 | /* file exists */ | |
384 | result = unlink(name); | |
385 | if(result == -1) { | |
386 | PERROR("unlink of socket file"); | |
387 | goto close_sock; | |
388 | } | |
389 | WARN("socket already exists; overwriting"); | |
390 | } | |
391 | ||
d0b5f2b9 PMF |
392 | result = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); |
393 | if(result == -1) { | |
394 | PERROR("bind"); | |
395 | goto close_sock; | |
396 | } | |
397 | ||
aca1ad90 PMF |
398 | result = listen(fd, 1); |
399 | if(result == -1) { | |
400 | PERROR("listen"); | |
401 | goto close_sock; | |
402 | } | |
403 | ||
b0540e11 PMF |
404 | if(path_out) { |
405 | *path_out = ""; | |
d0b5f2b9 | 406 | *path_out = strdupa(addr.sun_path); |
b0540e11 | 407 | } |
d0b5f2b9 PMF |
408 | |
409 | return fd; | |
410 | ||
411 | close_sock: | |
412 | close(fd); | |
413 | ||
414 | return -1; | |
415 | } | |
416 | ||
4e2a8808 PMF |
417 | int ustcomm_send_request(struct ustcomm_connection *conn, char *req, char **reply) |
418 | { | |
419 | int result; | |
420 | ||
421 | result = send(conn->fd, req, strlen(req), 0); | |
422 | if(result == -1) { | |
423 | PERROR("send"); | |
424 | return -1; | |
425 | } | |
4e2a8808 PMF |
426 | |
427 | if(!reply) | |
428 | return 1; | |
429 | ||
430 | *reply = (char *) malloc(MSG_MAX+1); | |
431 | result = recv(conn->fd, *reply, MSG_MAX, 0); | |
432 | if(result == -1) { | |
433 | PERROR("recv"); | |
434 | return -1; | |
435 | } | |
436 | else if(result == 0) { | |
437 | return 0; | |
438 | } | |
439 | ||
440 | (*reply)[result] = '\0'; | |
441 | ||
442 | return 1; | |
443 | } | |
444 | ||
445 | int ustcomm_connect_path(char *path, struct ustcomm_connection *conn, pid_t signalpid) | |
446 | { | |
447 | int fd; | |
448 | int result; | |
449 | struct sockaddr_un addr; | |
450 | ||
451 | result = fd = socket(PF_UNIX, SOCK_STREAM, 0); | |
452 | if(result == -1) { | |
453 | PERROR("socket"); | |
454 | return -1; | |
455 | } | |
456 | ||
457 | addr.sun_family = AF_UNIX; | |
458 | ||
459 | result = snprintf(addr.sun_path, UNIX_PATH_MAX, "%s", path); | |
460 | if(result >= UNIX_PATH_MAX) { | |
461 | ERR("string overflow allocating socket name"); | |
462 | return -1; | |
463 | } | |
464 | ||
52c51a47 PMF |
465 | if(signalpid >= 0) { |
466 | result = signal_process(signalpid); | |
467 | if(result == -1) { | |
468 | ERR("could not signal process"); | |
469 | return -1; | |
470 | } | |
471 | } | |
4e2a8808 PMF |
472 | |
473 | result = connect(fd, (struct sockaddr *)&addr, sizeof(addr)); | |
474 | if(result == -1) { | |
475 | PERROR("connect"); | |
476 | return -1; | |
477 | } | |
478 | ||
479 | conn->fd = fd; | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
484 | int ustcomm_disconnect(struct ustcomm_connection *conn) | |
485 | { | |
486 | return close(conn->fd); | |
487 | } | |
488 | ||
489 | int ustcomm_connect_app(pid_t pid, struct ustcomm_connection *conn) | |
490 | { | |
491 | int result; | |
492 | char path[UNIX_PATH_MAX]; | |
493 | ||
494 | ||
495 | result = snprintf(path, UNIX_PATH_MAX, "%s/%d", SOCK_DIR, pid); | |
496 | if(result >= UNIX_PATH_MAX) { | |
497 | fprintf(stderr, "string overflow allocating socket name"); | |
498 | return -1; | |
499 | } | |
500 | ||
501 | return ustcomm_connect_path(path, conn, pid); | |
502 | } | |
503 | ||
504 | int ustcomm_disconnect_app(struct ustcomm_connection *conn) | |
505 | { | |
506 | close(conn->fd); | |
507 | return 0; | |
508 | } | |
509 | ||
d0b5f2b9 PMF |
510 | int ustcomm_init_app(pid_t pid, struct ustcomm_app *handle) |
511 | { | |
512 | int result; | |
513 | char *name; | |
514 | ||
515 | result = asprintf(&name, "%s/%d", SOCK_DIR, (int)pid); | |
516 | if(result >= UNIX_PATH_MAX) { | |
517 | ERR("string overflow allocating socket name"); | |
518 | return -1; | |
519 | } | |
520 | ||
811e4b93 PMF |
521 | handle->server.listen_fd = init_named_socket(name, &(handle->server.socketpath)); |
522 | if(handle->server.listen_fd < 0) { | |
aca1ad90 | 523 | ERR("error initializing named socket"); |
d0b5f2b9 PMF |
524 | goto free_name; |
525 | } | |
526 | free(name); | |
527 | ||
811e4b93 | 528 | INIT_LIST_HEAD(&handle->server.connections); |
aca1ad90 | 529 | |
d0b5f2b9 PMF |
530 | return 0; |
531 | ||
532 | free_name: | |
533 | free(name); | |
534 | return -1; | |
535 | } | |
536 | ||
537 | int ustcomm_init_ustd(struct ustcomm_ustd *handle) | |
538 | { | |
3847c3ba PMF |
539 | int result; |
540 | char *name; | |
541 | ||
542 | result = asprintf(&name, "%s/%s", SOCK_DIR, "ustd"); | |
543 | if(result >= UNIX_PATH_MAX) { | |
544 | ERR("string overflow allocating socket name"); | |
545 | return -1; | |
546 | } | |
547 | ||
811e4b93 PMF |
548 | handle->server.listen_fd = init_named_socket(name, &handle->server.socketpath); |
549 | if(handle->server.listen_fd < 0) { | |
6cb88bc0 | 550 | ERR("error initializing named socket at %s", name); |
aca1ad90 PMF |
551 | goto free_name; |
552 | } | |
3847c3ba | 553 | free(name); |
d0b5f2b9 | 554 | |
811e4b93 | 555 | INIT_LIST_HEAD(&handle->server.connections); |
aca1ad90 | 556 | |
d0b5f2b9 | 557 | return 0; |
aca1ad90 PMF |
558 | |
559 | free_name: | |
560 | free(name); | |
561 | return -1; | |
d0b5f2b9 | 562 | } |
b02e31e5 | 563 | |
aca1ad90 | 564 | static char *find_tok(char *str) |
b02e31e5 PMF |
565 | { |
566 | while(*str == ' ') { | |
567 | str++; | |
568 | ||
569 | if(*str == 0) | |
570 | return NULL; | |
571 | } | |
572 | ||
573 | return str; | |
574 | } | |
575 | ||
576 | static char *find_sep(char *str) | |
577 | { | |
578 | while(*str != ' ') { | |
579 | str++; | |
580 | ||
581 | if(*str == 0) | |
582 | break; | |
583 | } | |
584 | ||
585 | return str; | |
586 | } | |
587 | ||
588 | int nth_token_is(char *str, char *token, int tok_no) | |
589 | { | |
590 | int i; | |
591 | char *start; | |
592 | char *end; | |
593 | ||
594 | for(i=0; i<=tok_no; i++) { | |
595 | str = find_tok(str); | |
596 | if(str == NULL) | |
597 | return -1; | |
598 | ||
599 | start = str; | |
600 | ||
601 | str = find_sep(str); | |
602 | if(str == NULL) | |
603 | return -1; | |
604 | ||
605 | end = str; | |
606 | } | |
607 | ||
608 | if(end-start != strlen(token)) | |
609 | return 0; | |
610 | ||
611 | if(strncmp(start, token, end-start)) | |
612 | return 0; | |
613 | ||
614 | return 1; | |
615 | } | |
616 | ||
617 | char *nth_token(char *str, int tok_no) | |
618 | { | |
619 | static char *retval = NULL; | |
620 | int i; | |
621 | char *start; | |
622 | char *end; | |
623 | ||
624 | for(i=0; i<=tok_no; i++) { | |
625 | str = find_tok(str); | |
626 | if(str == NULL) | |
627 | return NULL; | |
628 | ||
629 | start = str; | |
630 | ||
631 | str = find_sep(str); | |
632 | if(str == NULL) | |
633 | return NULL; | |
634 | ||
635 | end = str; | |
636 | } | |
637 | ||
638 | if(retval) { | |
639 | free(retval); | |
640 | retval = NULL; | |
641 | } | |
642 | ||
aca1ad90 | 643 | asprintf(&retval, "%.*s", (int)(end-start), start); |
b02e31e5 PMF |
644 | |
645 | return retval; | |
646 | } | |
647 |