d3372da9 |
1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
3 | * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com) |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
19 | #include <stdlib.h> |
20 | #include <stdio.h> |
21 | #include <malloc.h> |
22 | #include <wchar.h> |
23 | #include <string.h> |
24 | #include <errno.h> |
25 | #include <dirent.h> |
26 | #include <sys/stat.h> |
27 | #include <unistd.h> |
28 | #include <fcntl.h> |
29 | #include <signal.h> |
30 | |
31 | #ifdef HAVE_CONFIG_H |
32 | #include <config.h> |
33 | #endif |
34 | #include "client.h" |
35 | #include "conf.h" |
36 | #include "log.h" |
37 | #include "utils.h" |
38 | #include "module.h" |
39 | #include "tiger.h" |
40 | #include "net.h" |
41 | #include "sysevents.h" |
42 | |
43 | struct scanstate |
44 | { |
45 | struct scanstate *next; |
46 | struct sharecache *node; |
47 | DIR *dd; |
48 | }; |
49 | |
50 | struct scanqueue |
51 | { |
52 | struct scanqueue *next; |
53 | struct scanstate *state; |
54 | }; |
55 | |
56 | static int conf_share(int argc, wchar_t **argv); |
57 | static void freecache(struct sharecache *node); |
58 | static void checkhashes(void); |
59 | |
60 | static struct configvar myvars[] = |
61 | { |
62 | {CONF_VAR_STRING, "defnick", {.str = L"DoldaConnect user"}}, |
63 | {CONF_VAR_INT, "scanfilemask", {.num = 0004}}, |
64 | {CONF_VAR_INT, "scandirmask", {.num = 0005}}, |
65 | {CONF_VAR_STRING, "hashcache", {.str = L"dc-hashcache"}}, |
66 | {CONF_VAR_END} |
67 | }; |
68 | |
69 | static struct configcmd mycmds[] = |
70 | { |
71 | {"share", conf_share}, |
72 | {NULL} |
73 | }; |
74 | |
75 | static struct scanstate *scanjob = NULL; |
76 | static struct scanqueue *scanqueue = NULL; |
77 | static struct sharepoint *shares = NULL; |
78 | static struct hashcache *hashcache = NULL; |
79 | static pid_t hashjob = 0; |
80 | struct sharecache *shareroot = NULL; |
81 | unsigned long long sharesize = 0; |
82 | GCBCHAIN(sharechangecb, unsigned long long); |
83 | |
84 | static int conf_share(int argc, wchar_t **argv) |
85 | { |
86 | struct sharepoint *share; |
87 | char *b; |
88 | |
89 | if(argc < 3) |
90 | { |
91 | flog(LOG_WARNING, "not enough arguments given for share command"); |
92 | return(1); |
93 | } |
94 | if((b = icwcstombs(argv[2], NULL)) == NULL) |
95 | { |
96 | flog(LOG_WARNING, "could not convert wcs path (%ls) to current locale's charset: %s", argv[2], strerror(errno)); |
97 | return(1); |
98 | } |
99 | for(share = shares; share != NULL; share = share->next) |
100 | { |
101 | if(!strcmp(share->path, b) && !wcscmp(share->name, argv[1])) |
102 | { |
103 | share->delete = 0; |
104 | free(b); |
105 | return(0); |
106 | } |
107 | } |
108 | share = smalloc(sizeof(*share)); |
109 | share->path = b; |
110 | share->delete = 0; |
111 | share->name = swcsdup(argv[1]); |
112 | share->next = shares; |
113 | share->prev = NULL; |
114 | if(shares != NULL) |
115 | shares->prev = share; |
116 | shares = share; |
117 | return(0); |
118 | } |
119 | |
120 | static void dumpsharecache(struct sharecache *node, int l) |
121 | { |
122 | int i; |
123 | |
124 | for(; node != NULL; node = node->next) |
125 | { |
126 | for(i = 0; i < l; i++) |
127 | putc('\t', stdout); |
128 | printf("%ls\n", node->name); |
129 | if(node->f.b.type == FILE_DIR) |
130 | dumpsharecache(node->child, l + 1); |
131 | } |
132 | } |
133 | |
a55f78c6 |
134 | struct hash *newhash(wchar_t *algo, size_t len, char *buf) |
135 | { |
136 | struct hash *ret; |
137 | |
138 | ret = smalloc(sizeof(*ret)); |
139 | memset(ret, 0, sizeof(*ret)); |
140 | ret->algo = swcsdup(algo); |
141 | ret->len = len; |
142 | ret->buf = memcpy(smalloc(len), buf, len); |
143 | return(ret); |
144 | } |
145 | |
146 | void freehash(struct hash *hash) |
147 | { |
148 | free(hash->algo); |
149 | free(hash->buf); |
150 | free(hash); |
151 | } |
152 | |
153 | struct hash *duphash(struct hash *hash) |
154 | { |
155 | return(newhash(hash->algo, hash->len, hash->buf)); |
156 | } |
157 | |
158 | struct hash *parsehash(wchar_t *text) |
159 | { |
160 | wchar_t *p; |
161 | char *mbsbuf, *decbuf; |
162 | size_t buflen; |
163 | struct hash *ret; |
164 | |
165 | if((p = wcschr(text, L':')) == NULL) |
166 | return(NULL); |
167 | *(p++) = L'\0'; |
168 | if((mbsbuf = icwcstombs(p, "US-ASCII")) == NULL) |
169 | return(NULL); |
170 | decbuf = base64decode(mbsbuf, &buflen); |
171 | free(mbsbuf); |
172 | if(decbuf == NULL) |
173 | return(NULL); |
174 | ret = newhash(text, buflen, decbuf); |
175 | free(decbuf); |
176 | return(ret); |
177 | } |
178 | |
179 | wchar_t *unparsehash(struct hash *hash) |
180 | { |
2eaefd31 |
181 | static wchar_t *buf = NULL; |
182 | wchar_t *whbuf; |
a55f78c6 |
183 | char *hbuf; |
184 | size_t bufsize, bufdata; |
185 | |
2eaefd31 |
186 | if(buf != NULL) |
187 | free(buf); |
a55f78c6 |
188 | buf = NULL; |
189 | bufsize = bufdata = 0; |
190 | hbuf = base64encode(hash->buf, hash->len); |
191 | if((whbuf = icmbstowcs(hbuf, "US-ASCII")) == NULL) |
192 | { |
193 | flog(LOG_CRIT, "bug! could not convert base64 from us-ascii: %s", strerror(errno)); |
194 | abort(); |
195 | } |
196 | free(hbuf); |
197 | bufcat(buf, hash->algo, wcslen(hash->algo)); |
198 | addtobuf(buf, ':'); |
199 | bufcat(buf, whbuf, wcslen(whbuf)); |
200 | free(whbuf); |
201 | return(buf); |
202 | } |
203 | |
4f8fc795 |
204 | int hashcmp(struct hash *h1, struct hash *h2) |
205 | { |
206 | if(wcscmp(h1->algo, h2->algo)) |
207 | return(0); |
208 | if(h1->len != h2->len) |
209 | return(0); |
210 | if(memcmp(h1->buf, h2->buf, h1->len)) |
211 | return(0); |
212 | return(1); |
213 | } |
214 | |
d3372da9 |
215 | static struct hashcache *newhashcache(void) |
216 | { |
217 | struct hashcache *new; |
218 | |
219 | new = smalloc(sizeof(*new)); |
220 | memset(new, 0, sizeof(*new)); |
221 | new->next = hashcache; |
222 | new->prev = NULL; |
223 | if(hashcache != NULL) |
224 | hashcache->prev = new; |
225 | hashcache = new; |
226 | return(new); |
227 | } |
228 | |
229 | static void freehashcache(struct hashcache *hc) |
230 | { |
231 | if(hc->next != NULL) |
232 | hc->next->prev = hc->prev; |
233 | if(hc->prev != NULL) |
234 | hc->prev->next = hc->next; |
235 | if(hc == hashcache) |
236 | hashcache = hc->next; |
237 | free(hc); |
238 | } |
239 | |
240 | static char *findhashcachefile(int filldef) |
241 | { |
242 | static char ret[128]; |
243 | char *hcname; |
244 | |
245 | if(getenv("HOME") != NULL) |
246 | { |
247 | snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME")); |
248 | if(!access(ret, R_OK)) |
249 | return(ret); |
250 | } |
251 | if((hcname = icswcstombs(confgetstr("cli", "hashcache"), NULL, NULL)) == NULL) |
252 | { |
253 | flog(LOG_WARNING, "could not convert hash cache name into local charset: %s", strerror(errno)); |
254 | return(NULL); |
255 | } |
256 | if(strchr(hcname, '/') != NULL) |
257 | { |
258 | if(!access(hcname, R_OK)) |
259 | { |
260 | strcpy(ret, hcname); |
261 | return(ret); |
262 | } |
263 | } else { |
264 | snprintf(ret, sizeof(ret), "/etc/%s", hcname); |
265 | if(!access(ret, R_OK)) |
266 | return(ret); |
267 | snprintf(ret, sizeof(ret), "/usr/etc/%s", hcname); |
268 | if(!access(ret, R_OK)) |
269 | return(ret); |
270 | snprintf(ret, sizeof(ret), "/usr/local/etc/%s", hcname); |
271 | if(!access(ret, R_OK)) |
272 | return(ret); |
273 | } |
274 | if(filldef) |
275 | { |
276 | if(getenv("HOME") != NULL) |
277 | snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME")); |
278 | else |
279 | snprintf(ret, sizeof(ret), "/etc/%s", hcname); |
280 | return(ret); |
281 | } else { |
282 | return(NULL); |
283 | } |
284 | } |
285 | |
286 | static struct hashcache *findhashcache(dev_t dev, ino_t inode) |
287 | { |
288 | struct hashcache *hc; |
289 | |
290 | for(hc = hashcache; hc != NULL; hc = hc->next) |
291 | { |
292 | if((hc->dev == dev) && (hc->inode == inode)) |
293 | return(hc); |
294 | } |
295 | return(NULL); |
296 | } |
297 | |
298 | static void readhashcache(void) |
299 | { |
300 | int i, wc, line; |
301 | char *hcname; |
302 | FILE *stream; |
303 | char linebuf[256]; |
304 | char *p, *p2, *wv[32], *hash; |
305 | struct hashcache *hc; |
306 | size_t len; |
307 | |
308 | if((hcname = findhashcachefile(0)) == NULL) |
309 | return; |
310 | if((stream = fopen(hcname, "r")) == NULL) |
311 | { |
312 | flog(LOG_WARNING, "could not open hash cache %s: %s", hcname, strerror(errno)); |
313 | return; |
314 | } |
315 | while(hashcache != NULL) |
316 | freehashcache(hashcache); |
317 | line = 0; |
318 | while(!feof(stream)) |
319 | { |
320 | fgets(linebuf, sizeof(linebuf), stream); |
321 | line++; |
322 | for(p = linebuf; *p; p++) |
323 | { |
324 | if(*p == '\n') |
325 | *p = ' '; |
326 | } |
327 | if(linebuf[0] == '#') |
328 | continue; |
329 | for(wc = 0, p = linebuf; (wc < 32) && ((p2 = strchr(p, ' ')) != NULL); p = p2 + 1) |
330 | { |
331 | if(p2 == p) |
332 | continue; |
333 | *p2 = 0; |
334 | wv[wc++] = p; |
335 | } |
336 | if(wc < 3) |
337 | continue; |
338 | hc = newhashcache(); |
339 | hc->dev = strtoll(wv[0], NULL, 10); |
340 | hc->inode = strtoll(wv[1], NULL, 10); |
341 | hc->mtime = strtoll(wv[2], NULL, 10); |
342 | for(i = 3; i < wc; i++) |
343 | { |
344 | if(!strcmp(wv[i], "tth")) |
345 | { |
346 | if(++i >= wc) |
347 | continue; |
348 | hash = base64decode(wv[i], &len); |
349 | if(len != 24) |
350 | { |
351 | free(hash); |
352 | continue; |
353 | } |
354 | memcpy(hc->tth, hash, 24); |
355 | free(hash); |
356 | } |
357 | } |
358 | } |
359 | fclose(stream); |
360 | } |
361 | |
362 | static void writehashcache(void) |
363 | { |
364 | char *buf; |
365 | char *hcname; |
366 | FILE *stream; |
367 | struct hashcache *hc; |
368 | |
369 | hcname = findhashcachefile(1); |
370 | if((stream = fopen(hcname, "w")) == NULL) |
371 | { |
372 | flog(LOG_WARNING, "could not write hash cache %s: %s", hcname, strerror(errno)); |
373 | return; |
374 | } |
375 | fprintf(stream, "# Dolda Connect hash cache file\n"); |
376 | fprintf(stream, "# Generated automatically, do not edit\n"); |
377 | fprintf(stream, "# Format: DEVICE INODE MTIME [HASH...]\n"); |
378 | fprintf(stream, "# HASH := HASHTYPE HASHVAL\n"); |
379 | fprintf(stream, "# HASHTYPE can currently only be `tth'\n"); |
380 | for(hc = hashcache; hc != NULL; hc = hc->next) |
381 | { |
382 | buf = base64encode(hc->tth, 24); |
383 | fprintf(stream, "%lli %lli %li tth %s\n", hc->dev, (long long)hc->inode, hc->mtime, buf); |
384 | free(buf); |
385 | } |
386 | fclose(stream); |
387 | } |
388 | |
389 | static void hashread(struct socket *sk, void *uudata) |
390 | { |
391 | static char *hashbuf; |
392 | static size_t hashbufsize = 0, hashbufdata = 0; |
393 | char *buf, *p, *p2, *lp; |
394 | size_t bufsize; |
395 | char *wv[32]; |
396 | int wc; |
397 | dev_t dev; |
398 | ino_t inode; |
399 | time_t mtime; |
400 | struct hashcache *hc; |
401 | |
402 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) |
403 | return; |
404 | bufcat(hashbuf, buf, bufsize); |
405 | free(buf); |
406 | while((lp = memchr(hashbuf, '\n', hashbufdata)) != NULL) |
407 | { |
408 | *(lp++) = 0; |
409 | wc = 0; |
410 | p = hashbuf; |
411 | while(1) |
412 | { |
413 | while((p2 = strchr(p, ' ')) == p) |
414 | p++; |
415 | wv[wc++] = p; |
416 | if(p2 == NULL) |
417 | { |
418 | break; |
419 | } else { |
420 | *p2 = 0; |
421 | p = p2 + 1; |
422 | } |
423 | } |
424 | if(wc != 4) |
425 | { |
426 | flog(LOG_ERR, "BUG: unexpected number of words (%i) arrived from hashing process", wc); |
427 | } else { |
428 | dev = strtoll(wv[0], NULL, 10); |
429 | inode = strtoll(wv[1], NULL, 10); |
430 | mtime = strtol(wv[2], NULL, 10); |
431 | if((hc = findhashcache(dev, inode)) == NULL) |
432 | { |
433 | hc = newhashcache(); |
434 | hc->dev = dev; |
435 | hc->inode = inode; |
436 | } |
437 | hc->mtime = mtime; |
438 | buf = base64decode(wv[3], NULL); |
439 | memcpy(hc->tth, buf, 24); |
440 | free(buf); |
441 | writehashcache(); |
442 | } |
443 | memmove(hashbuf, lp, hashbufdata -= (lp - hashbuf)); |
444 | } |
445 | } |
446 | |
447 | static void hashexit(pid_t pid, int status, void *uudata) |
448 | { |
449 | if(pid != hashjob) |
450 | flog(LOG_ERR, "BUG: hashing process changed PID?! old: %i new %i", hashjob, pid); |
451 | if(status) |
452 | flog(LOG_WARNING, "hashing process exited with non-zero status: %i", status); |
453 | hashjob = 0; |
454 | checkhashes(); |
455 | } |
456 | |
457 | static int hashfile(char *path) |
458 | { |
459 | int i, ret; |
460 | int fd; |
461 | int pfd[2]; |
462 | char buf[4096]; |
463 | struct stat sb; |
464 | struct tigertreehash tth; |
465 | char digest[24]; |
466 | struct socket *outsock; |
467 | |
468 | if((fd = open(path, O_RDONLY)) < 0) |
469 | { |
470 | flog(LOG_WARNING, "could not open %s for hashing: %s", path, strerror(errno)); |
471 | return(1); |
472 | } |
473 | if(fstat(fd, &sb) < 0) |
474 | { |
475 | flog(LOG_WARNING, "could not stat %s while hashing: %s", path, strerror(errno)); |
476 | close(fd); |
477 | return(1); |
478 | } |
479 | if(pipe(pfd) < 0) |
480 | { |
481 | flog(LOG_WARNING, "could not create pipe(!): %s", strerror(errno)); |
482 | close(fd); |
483 | return(1); |
484 | } |
485 | hashjob = fork(); |
486 | if(hashjob < 0) |
487 | { |
488 | flog(LOG_WARNING, "could not fork(!) hashing process: %s", strerror(errno)); |
489 | close(fd); |
490 | close(pfd[0]); |
491 | close(pfd[1]); |
492 | return(1); |
493 | } |
494 | if(hashjob == 0) |
495 | { |
496 | nice(10); |
497 | signal(SIGHUP, SIG_DFL); |
498 | fd = dup2(fd, 4); |
499 | pfd[1] = dup2(pfd[1], 3); |
500 | dup2(fd, 0); |
501 | dup2(pfd[1], 1); |
502 | for(i = 3; i < FD_SETSIZE; i++) |
503 | close(i); |
504 | initlog(); |
505 | inittigertree(&tth); |
506 | while((ret = read(0, buf, 4096)) > 0) |
507 | dotigertree(&tth, buf, ret); |
508 | if(ret < 0) |
509 | { |
510 | flog(LOG_WARNING, "could not read from %s while hashing: %s", path, strerror(errno)); |
511 | exit(1); |
512 | } |
513 | synctigertree(&tth); |
514 | restigertree(&tth, digest); |
515 | ret = snprintf(buf, sizeof(buf), "%lli %lli %li %s\n", sb.st_dev, (long long)sb.st_ino, sb.st_mtime, base64encode(digest, 24)); |
516 | write(1, buf, ret); |
517 | exit(0); |
518 | } |
519 | close(fd); |
520 | close(pfd[1]); |
521 | outsock = wrapsock(pfd[0]); |
522 | outsock->readcb = hashread; |
523 | childcallback(hashjob, hashexit, NULL); |
524 | return(0); |
525 | } |
526 | |
527 | /* |
528 | * Call only when hashjob == 0 |
529 | */ |
530 | static void checkhashes(void) |
531 | { |
532 | struct sharecache *node; |
533 | struct hashcache *hc; |
534 | char *path; |
535 | |
536 | node = shareroot->child; |
537 | while(1) |
538 | { |
539 | if(node->child != NULL) |
540 | { |
541 | node = node->child; |
542 | continue; |
543 | } |
544 | if(!node->f.b.hastth) |
545 | { |
546 | if((hc = findhashcache(node->dev, node->inode)) != NULL) |
547 | { |
548 | memcpy(node->hashtth, hc->tth, 24); |
549 | node->f.b.hastth = 1; |
550 | GCBCHAINDOCB(sharechangecb, sharesize); |
551 | } else { |
552 | path = getfspath(node); |
553 | if(hashfile(path)) |
554 | { |
555 | flog(LOG_WARNING, "could not hash %s, unsharing it", path); |
556 | freecache(node); |
557 | } |
558 | free(path); |
559 | return; |
560 | } |
561 | } |
562 | while(node->next == NULL) |
563 | { |
564 | if((node = node->parent) == shareroot) |
565 | break; |
566 | } |
567 | if(node == shareroot) |
568 | break; |
569 | node = node->next; |
570 | } |
571 | } |
572 | |
573 | struct sharecache *nextscnode(struct sharecache *node) |
574 | { |
575 | if(node->child != NULL) |
576 | return(node->child); |
577 | while(node->next == NULL) |
578 | { |
579 | node = node->parent; |
580 | if(node == shareroot) |
581 | return(NULL); |
582 | } |
583 | return(node->next); |
584 | } |
585 | |
586 | static void freescan(struct scanstate *job) |
587 | { |
588 | if(job->dd != NULL) |
589 | closedir(job->dd); |
590 | free(job); |
591 | } |
592 | |
593 | /* No need for optimization; lookup isn't really that common */ |
594 | struct sharecache *findcache(struct sharecache *parent, wchar_t *name) |
595 | { |
596 | struct sharecache *node; |
597 | |
598 | for(node = parent->child; node != NULL; node = node->next) |
599 | { |
600 | if(!wcscmp(node->name, name)) |
601 | return(node); |
602 | } |
603 | return(NULL); |
604 | } |
605 | |
606 | static void attachcache(struct sharecache *parent, struct sharecache *node) |
607 | { |
608 | node->parent = parent; |
609 | node->next = parent->child; |
610 | if(parent->child != NULL) |
611 | parent->child->prev = node; |
612 | parent->child = node; |
613 | } |
614 | |
615 | static void detachcache(struct sharecache *node) |
616 | { |
617 | if(node->next != NULL) |
618 | node->next->prev = node->prev; |
619 | if(node->prev != NULL) |
620 | node->prev->next = node->next; |
621 | if((node->parent != NULL) && (node->parent->child == node)) |
622 | node->parent->child = node->next; |
623 | node->parent = NULL; |
624 | node->next = NULL; |
625 | node->prev = NULL; |
626 | } |
627 | |
628 | static void freecache(struct sharecache *node) |
629 | { |
630 | struct sharecache *cur, *next; |
631 | struct scanqueue *q, *nq, **fq; |
632 | |
633 | detachcache(node); |
634 | fq = &scanqueue; |
635 | for(q = scanqueue; q != NULL; q = nq) |
636 | { |
637 | nq = q->next; |
638 | if(q->state->node == node) |
639 | { |
640 | flog(LOG_DEBUG, "freed node %ls cancelled queued scan", node->name); |
641 | freescan(q->state); |
642 | *fq = q->next; |
643 | free(q); |
644 | continue; |
645 | } |
646 | fq = &q->next; |
647 | } |
648 | if(node->child != NULL) |
649 | { |
650 | for(cur = node->child; cur != NULL; cur = next) |
651 | { |
652 | next = cur->next; |
653 | freecache(cur); |
654 | } |
655 | } |
656 | CBCHAINDOCB(node, share_delete, node); |
657 | CBCHAINFREE(node, share_delete); |
658 | sharesize -= node->size; |
659 | if(node->path != NULL) |
660 | free(node->path); |
661 | if(node->name != NULL) |
662 | free(node->name); |
663 | free(node); |
664 | } |
665 | |
666 | static void freesharepoint(struct sharepoint *share) |
667 | { |
668 | struct sharecache *node; |
669 | |
670 | if(share->next != NULL) |
671 | share->next->prev = share->prev; |
672 | if(share->prev != NULL) |
673 | share->prev->next = share->next; |
674 | if(share == shares) |
675 | shares = share->next; |
676 | if((node = findcache(shareroot, share->name)) != NULL) |
677 | freecache(node); |
678 | free(share->path); |
679 | free(share->name); |
680 | free(share); |
681 | } |
682 | |
683 | static struct sharecache *newcache(void) |
684 | { |
685 | struct sharecache *new; |
686 | |
687 | new = smalloc(sizeof(*new)); |
688 | memset(new, 0, sizeof(*new)); |
689 | CBCHAININIT(new, share_delete); |
690 | return(new); |
691 | } |
692 | |
693 | char *getfspath(struct sharecache *node) |
694 | { |
695 | char *buf, *mbsname; |
696 | size_t bufsize; |
697 | |
698 | buf = smalloc(bufsize = 64); |
699 | *buf = 0; |
700 | while(node != NULL) |
701 | { |
702 | if(node->path != NULL) |
703 | { |
704 | if(bufsize < strlen(node->path) + strlen(buf) + 1) |
705 | buf = srealloc(buf, strlen(node->path) + strlen(buf) + 1); |
706 | memmove(buf + strlen(node->path), buf, strlen(buf) + 1); |
707 | memcpy(buf, node->path, strlen(node->path)); |
708 | return(buf); |
709 | } |
710 | if((mbsname = icwcstombs(node->name, NULL)) == NULL) |
711 | { |
712 | flog(LOG_WARNING, "could not map unicode share name (%ls) into filesystem charset: %s", node->name, strerror(errno)); |
713 | free(buf); |
714 | return(NULL); |
715 | } |
716 | while(bufsize < strlen(mbsname) + 1 + strlen(buf) + 1) |
717 | buf = srealloc(buf, bufsize *= 2); |
718 | memmove(buf + strlen(mbsname) + 1, buf, strlen(buf) + 1); |
719 | memcpy(buf + 1, mbsname, strlen(mbsname)); |
720 | *buf = '/'; |
721 | free(mbsname); |
722 | node = node->parent; |
723 | } |
724 | buf = srealloc(buf, strlen(buf) + 1); |
725 | return(buf); |
726 | } |
727 | |
728 | static int checknode(struct sharecache *node) |
729 | { |
730 | char *path; |
731 | struct stat sb; |
732 | |
733 | if(node->parent == NULL) |
734 | { |
735 | return(1); |
736 | } else { |
737 | if(!checknode(node->parent)) |
738 | return(0); |
739 | path = getfspath(node); |
740 | if(stat(path, &sb) < 0) |
741 | { |
742 | flog(LOG_INFO, "%s was found to be broken (%s); scheduling rescan of parent", path, strerror(errno)); |
743 | queuescan(node->parent); |
744 | return(0); |
745 | } else { |
746 | return(1); |
747 | } |
748 | } |
749 | } |
750 | |
751 | int opensharecache(struct sharecache *node) |
752 | { |
753 | char *path; |
754 | int fd, errbak; |
755 | |
756 | path = getfspath(node); |
757 | fd = open(path, O_RDONLY); |
758 | errbak = errno; |
759 | if(fd < 0) |
760 | { |
761 | flog(LOG_WARNING, "could not open %s: %s", path, strerror(errbak)); |
762 | checknode(node); |
763 | } |
764 | free(path); |
765 | errno = errbak; |
766 | return(fd); |
767 | } |
768 | |
769 | static struct scanstate *newscan(struct sharecache *node) |
770 | { |
771 | struct scanstate *new; |
772 | |
773 | new = smalloc(sizeof(*new)); |
774 | new->next = NULL; |
775 | new->node = node; |
776 | new->dd = NULL; |
777 | return(new); |
778 | } |
779 | |
780 | void queuescan(struct sharecache *node) |
781 | { |
782 | struct scanqueue *new; |
783 | |
784 | new = smalloc(sizeof(*new)); |
785 | new->state = newscan(node); |
786 | new->next = scanqueue; |
787 | scanqueue = new; |
788 | } |
789 | |
790 | /* For internal use in doscan() */ |
791 | static void removestale(struct sharecache *node) |
792 | { |
793 | struct sharecache *cur, *next; |
794 | |
795 | for(cur = node->child; cur != NULL; cur = next) |
796 | { |
797 | next = cur->next; |
798 | if(!cur->f.b.found) |
799 | freecache(cur); |
800 | } |
801 | } |
802 | |
803 | /* For internal use in doscan() */ |
804 | static void jobdone(void) |
805 | { |
806 | struct scanstate *jbuf; |
807 | |
808 | jbuf = scanjob; |
809 | scanjob = jbuf->next; |
810 | freescan(jbuf); |
811 | if(scanjob != NULL) |
812 | fchdir(dirfd(scanjob->dd)); |
813 | } |
814 | |
815 | int doscan(int quantum) |
816 | { |
817 | char *path; |
818 | wchar_t *wcs; |
819 | int type; |
820 | struct sharecache *n; |
821 | struct scanstate *jbuf; |
822 | struct scanqueue *qbuf; |
823 | struct dirent *de; |
824 | struct stat sb; |
825 | struct hashcache *hc; |
826 | int dmask, fmask; |
827 | static int busybefore = 0; |
828 | |
829 | dmask = confgetint("cli", "scandirmask"); |
830 | fmask = confgetint("cli", "scanfilemask"); |
831 | if((scanjob != NULL) && (scanjob->dd != NULL)) |
832 | { |
833 | while(fchdir(dirfd(scanjob->dd)) < 0) |
834 | { |
835 | flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno)); |
836 | removestale(scanjob->node); |
837 | jobdone(); |
838 | } |
839 | } |
840 | while(quantum-- > 0) |
841 | { |
842 | if(scanjob != NULL) |
843 | { |
844 | busybefore = 1; |
845 | } else { |
846 | while(scanjob == NULL) |
847 | { |
848 | if(scanqueue == NULL) |
849 | { |
850 | if(busybefore) |
851 | { |
852 | flog(LOG_INFO, "sharing %lli bytes", sharesize); |
853 | busybefore = 0; |
854 | GCBCHAINDOCB(sharechangecb, sharesize); |
855 | if(hashjob == 0) |
856 | checkhashes(); |
857 | } |
858 | return(0); |
859 | } |
860 | busybefore = 1; |
861 | scanjob = scanqueue->state; |
862 | qbuf = scanqueue; |
863 | scanqueue = qbuf->next; |
864 | free(qbuf); |
865 | for(n = scanjob->node->child; n != NULL; n = n->next) |
866 | n->f.b.found = 0; |
867 | } |
868 | } |
869 | if(scanjob->dd == NULL) |
870 | { |
871 | path = getfspath(scanjob->node); |
872 | if((scanjob->dd = opendir(path)) == NULL) |
873 | { |
874 | flog(LOG_WARNING, "cannot open directory %s for scanning: %s, deleting from share", path, strerror(errno)); |
875 | freecache(scanjob->node); |
876 | free(path); |
877 | jobdone(); |
878 | continue; |
879 | } |
880 | free(path); |
881 | if(fchdir(dirfd(scanjob->dd)) < 0) |
882 | { |
883 | flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno)); |
884 | jobdone(); |
885 | continue; |
886 | } |
887 | } |
888 | if((de = readdir(scanjob->dd)) == NULL) |
889 | { |
890 | removestale(scanjob->node); |
891 | jobdone(); |
892 | continue; |
893 | } |
894 | if(*de->d_name == '.') |
895 | continue; |
896 | if((wcs = icmbstowcs(de->d_name, NULL)) == NULL) |
897 | { |
898 | flog(LOG_WARNING, "file name %s has cannot be converted to wchar: %s", de->d_name, strerror(errno)); |
899 | continue; |
900 | } |
901 | n = findcache(scanjob->node, wcs); |
902 | if(stat(de->d_name, &sb) < 0) |
903 | { |
904 | free(wcs); |
905 | if(n != NULL) |
906 | { |
907 | flog(LOG_WARNING, "could not stat %s: %s, deleting from share", de->d_name, strerror(errno)); |
908 | freecache(n); |
909 | } else { |
910 | flog(LOG_WARNING, "could not stat %s: %s", de->d_name, strerror(errno)); |
911 | } |
912 | continue; |
913 | } |
914 | if(S_ISDIR(sb.st_mode)) |
915 | { |
916 | if(~sb.st_mode & dmask) |
917 | { |
918 | free(wcs); |
919 | continue; |
920 | } |
921 | type = FILE_DIR; |
922 | } else if(S_ISREG(sb.st_mode)) { |
923 | if(~sb.st_mode & fmask) |
924 | { |
925 | free(wcs); |
926 | continue; |
927 | } |
928 | type = FILE_REG; |
929 | } else { |
930 | flog(LOG_WARNING, "unhandled file type: %i", sb.st_mode); |
931 | free(wcs); |
932 | continue; |
933 | } |
934 | if(n != NULL) |
935 | { |
936 | if((n->f.b.type != type) || (n->mtime != sb.st_mtime) || ((type == FILE_REG) && (n->size != sb.st_size))) |
937 | { |
938 | freecache(n); |
939 | n = NULL; |
940 | } |
941 | } |
942 | if(n == NULL) |
943 | { |
944 | n = newcache(); |
945 | n->name = wcs; |
946 | if(S_ISREG(sb.st_mode)) |
947 | { |
948 | sharesize += (n->size = sb.st_size); |
949 | } else { |
950 | n->size = 0; |
951 | } |
952 | n->mtime = sb.st_mtime; |
953 | n->dev = sb.st_dev; |
954 | n->inode = sb.st_ino; |
955 | n->f.b.type = type; |
956 | attachcache(scanjob->node, n); |
957 | } else { |
958 | free(wcs); |
959 | } |
960 | n->f.b.found = 1; |
961 | if(n->f.b.type == FILE_DIR) |
962 | { |
963 | jbuf = newscan(n); |
964 | jbuf->next = scanjob; |
965 | scanjob = jbuf; |
966 | } else if(n->f.b.type == FILE_REG) { |
967 | if(n->f.b.hastth && (n->mtime != sb.st_mtime)) |
968 | n->f.b.hastth = 0; |
969 | if(!n->f.b.hastth) |
970 | { |
971 | if((hc = findhashcache(sb.st_dev, sb.st_ino)) != NULL) |
972 | { |
973 | if(hc->mtime == n->mtime) |
974 | { |
975 | n->f.b.hastth = 1; |
976 | memcpy(n->hashtth, hc->tth, 24); |
977 | } else { |
978 | freehashcache(hc); |
979 | } |
980 | } |
981 | } |
982 | } |
983 | } |
984 | return(1); |
985 | } |
986 | |
987 | void scanshares(void) |
988 | { |
989 | struct sharepoint *cur; |
990 | struct sharecache *node; |
991 | struct stat sb; |
992 | |
993 | for(cur = shares; cur != NULL; cur = cur->next) |
994 | { |
995 | if((node = findcache(shareroot, cur->name)) == NULL) |
996 | { |
997 | if(stat(cur->path, &sb)) |
998 | { |
999 | flog(LOG_WARNING, "could not stat share \"%ls\": %s", cur->name, strerror(errno)); |
1000 | continue; |
1001 | } |
1002 | if(!S_ISDIR(sb.st_mode)) |
1003 | { |
1004 | flog(LOG_WARNING, "%s is not a directory; won't share it", cur->path); |
1005 | continue; |
1006 | } |
1007 | node = newcache(); |
1008 | node->name = swcsdup(cur->name); |
1009 | node->path = sstrdup(cur->path); |
1010 | if(node->path[strlen(node->path) - 1] == '/') |
1011 | node->path[strlen(node->path) - 1] = 0; |
1012 | node->f.b.type = FILE_DIR; |
1013 | attachcache(shareroot, node); |
1014 | } |
1015 | queuescan(node); |
1016 | } |
1017 | } |
1018 | |
1019 | static void preinit(int hup) |
1020 | { |
1021 | struct sharepoint *cur; |
1022 | |
1023 | if(hup) |
1024 | { |
1025 | for(cur = shares; cur != NULL; cur = cur->next) |
1026 | cur->delete = 1; |
1027 | } else { |
1028 | shareroot = newcache(); |
1029 | shareroot->name = swcsdup(L""); |
1030 | shareroot->f.b.type = FILE_DIR; |
1031 | } |
1032 | } |
1033 | |
1034 | static int init(int hup) |
1035 | { |
1036 | struct sharepoint *cur, *next; |
1037 | |
1038 | readhashcache(); |
1039 | for(cur = shares; cur != NULL; cur = next) |
1040 | { |
1041 | next = cur->next; |
1042 | if(cur->delete) |
1043 | freesharepoint(cur); |
1044 | } |
1045 | scanshares(); |
1046 | if(!hup) |
1047 | while(doscan(100)); |
1048 | return(0); |
1049 | } |
1050 | |
1051 | static int run(void) |
1052 | { |
1053 | return(doscan(10)); |
1054 | } |
1055 | |
1056 | static void terminate(void) |
1057 | { |
1058 | if(hashjob != 0) |
1059 | kill(hashjob, SIGHUP); |
1060 | while(shares != NULL) |
1061 | freesharepoint(shares); |
1062 | freecache(shareroot); |
1063 | } |
1064 | |
1065 | static struct module me = |
1066 | { |
1067 | .name = "cli", |
1068 | .conf = |
1069 | { |
1070 | .vars = myvars, |
1071 | .cmds = mycmds |
1072 | }, |
1073 | .preinit = preinit, |
1074 | .init = init, |
1075 | .run = run, |
1076 | .terminate = terminate |
1077 | }; |
1078 | |
1079 | MODULE(me) |