Fix bugs in {G,}CBREG.
[doldaconnect.git] / daemon / client.c
CommitLineData
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"
d3372da9 39#include "net.h"
40#include "sysevents.h"
8b17e919 41#include <tiger.h>
d3372da9 42
43struct scanstate
44{
45 struct scanstate *next;
46 struct sharecache *node;
47 DIR *dd;
48};
49
50struct scanqueue
51{
52 struct scanqueue *next;
53 struct scanstate *state;
54};
55
56static int conf_share(int argc, wchar_t **argv);
57static void freecache(struct sharecache *node);
58static void checkhashes(void);
b00ef4d1 59static void writehashcache(int now);
d3372da9 60
61static struct configvar myvars[] =
62{
63 {CONF_VAR_STRING, "defnick", {.str = L"DoldaConnect user"}},
64 {CONF_VAR_INT, "scanfilemask", {.num = 0004}},
65 {CONF_VAR_INT, "scandirmask", {.num = 0005}},
66 {CONF_VAR_STRING, "hashcache", {.str = L"dc-hashcache"}},
67 {CONF_VAR_END}
68};
69
70static struct configcmd mycmds[] =
71{
72 {"share", conf_share},
73 {NULL}
74};
75
76static struct scanstate *scanjob = NULL;
77static struct scanqueue *scanqueue = NULL;
78static struct sharepoint *shares = NULL;
79static struct hashcache *hashcache = NULL;
b00ef4d1 80static struct timer *hashwritetimer = NULL;
cd8a934e 81/* Set initially to -1, but changed to 0 the first time run() is
82 * called. This is to avoid forking a hash job before daemonizing,
83 * since that would make the daemon unable to wait() for the hash
84 * job. */
85static pid_t hashjob = -1;
d3372da9 86struct sharecache *shareroot = NULL;
87unsigned long long sharesize = 0;
88GCBCHAIN(sharechangecb, unsigned long long);
89
90static int conf_share(int argc, wchar_t **argv)
91{
92 struct sharepoint *share;
93 char *b;
94
95 if(argc < 3)
96 {
97 flog(LOG_WARNING, "not enough arguments given for share command");
98 return(1);
99 }
100 if((b = icwcstombs(argv[2], NULL)) == NULL)
101 {
102 flog(LOG_WARNING, "could not convert wcs path (%ls) to current locale's charset: %s", argv[2], strerror(errno));
103 return(1);
104 }
105 for(share = shares; share != NULL; share = share->next)
106 {
107 if(!strcmp(share->path, b) && !wcscmp(share->name, argv[1]))
108 {
109 share->delete = 0;
110 free(b);
111 return(0);
112 }
113 }
114 share = smalloc(sizeof(*share));
115 share->path = b;
116 share->delete = 0;
117 share->name = swcsdup(argv[1]);
118 share->next = shares;
119 share->prev = NULL;
120 if(shares != NULL)
121 shares->prev = share;
122 shares = share;
123 return(0);
124}
125
126static void dumpsharecache(struct sharecache *node, int l)
127{
128 int i;
129
130 for(; node != NULL; node = node->next)
131 {
132 for(i = 0; i < l; i++)
133 putc('\t', stdout);
134 printf("%ls\n", node->name);
135 if(node->f.b.type == FILE_DIR)
136 dumpsharecache(node->child, l + 1);
137 }
138}
139
a55f78c6 140struct hash *newhash(wchar_t *algo, size_t len, char *buf)
141{
142 struct hash *ret;
143
144 ret = smalloc(sizeof(*ret));
145 memset(ret, 0, sizeof(*ret));
146 ret->algo = swcsdup(algo);
147 ret->len = len;
148 ret->buf = memcpy(smalloc(len), buf, len);
149 return(ret);
150}
151
152void freehash(struct hash *hash)
153{
154 free(hash->algo);
155 free(hash->buf);
156 free(hash);
157}
158
159struct hash *duphash(struct hash *hash)
160{
161 return(newhash(hash->algo, hash->len, hash->buf));
162}
163
164struct hash *parsehash(wchar_t *text)
165{
166 wchar_t *p;
167 char *mbsbuf, *decbuf;
168 size_t buflen;
169 struct hash *ret;
170
171 if((p = wcschr(text, L':')) == NULL)
172 return(NULL);
173 *(p++) = L'\0';
174 if((mbsbuf = icwcstombs(p, "US-ASCII")) == NULL)
175 return(NULL);
176 decbuf = base64decode(mbsbuf, &buflen);
177 free(mbsbuf);
178 if(decbuf == NULL)
179 return(NULL);
180 ret = newhash(text, buflen, decbuf);
181 free(decbuf);
182 return(ret);
183}
184
185wchar_t *unparsehash(struct hash *hash)
186{
2eaefd31 187 static wchar_t *buf = NULL;
188 wchar_t *whbuf;
a55f78c6 189 char *hbuf;
190 size_t bufsize, bufdata;
191
2eaefd31 192 if(buf != NULL)
193 free(buf);
a55f78c6 194 buf = NULL;
195 bufsize = bufdata = 0;
196 hbuf = base64encode(hash->buf, hash->len);
197 if((whbuf = icmbstowcs(hbuf, "US-ASCII")) == NULL)
198 {
199 flog(LOG_CRIT, "bug! could not convert base64 from us-ascii: %s", strerror(errno));
200 abort();
201 }
202 free(hbuf);
203 bufcat(buf, hash->algo, wcslen(hash->algo));
204 addtobuf(buf, ':');
205 bufcat(buf, whbuf, wcslen(whbuf));
206 free(whbuf);
2b77e3c4 207 addtobuf(buf, 0);
a55f78c6 208 return(buf);
209}
210
4f8fc795 211int hashcmp(struct hash *h1, struct hash *h2)
212{
213 if(wcscmp(h1->algo, h2->algo))
214 return(0);
215 if(h1->len != h2->len)
216 return(0);
217 if(memcmp(h1->buf, h2->buf, h1->len))
218 return(0);
219 return(1);
220}
221
d3372da9 222static struct hashcache *newhashcache(void)
223{
224 struct hashcache *new;
225
226 new = smalloc(sizeof(*new));
227 memset(new, 0, sizeof(*new));
228 new->next = hashcache;
229 new->prev = NULL;
230 if(hashcache != NULL)
231 hashcache->prev = new;
232 hashcache = new;
233 return(new);
234}
235
236static void freehashcache(struct hashcache *hc)
237{
238 if(hc->next != NULL)
239 hc->next->prev = hc->prev;
240 if(hc->prev != NULL)
241 hc->prev->next = hc->next;
242 if(hc == hashcache)
243 hashcache = hc->next;
244 free(hc);
245}
246
247static char *findhashcachefile(int filldef)
248{
249 static char ret[128];
250 char *hcname;
251
252 if(getenv("HOME") != NULL)
253 {
254 snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME"));
255 if(!access(ret, R_OK))
256 return(ret);
257 }
258 if((hcname = icswcstombs(confgetstr("cli", "hashcache"), NULL, NULL)) == NULL)
259 {
260 flog(LOG_WARNING, "could not convert hash cache name into local charset: %s", strerror(errno));
261 return(NULL);
262 }
263 if(strchr(hcname, '/') != NULL)
264 {
265 if(!access(hcname, R_OK))
266 {
267 strcpy(ret, hcname);
268 return(ret);
269 }
270 } else {
271 snprintf(ret, sizeof(ret), "/etc/%s", hcname);
272 if(!access(ret, R_OK))
273 return(ret);
274 snprintf(ret, sizeof(ret), "/usr/etc/%s", hcname);
275 if(!access(ret, R_OK))
276 return(ret);
277 snprintf(ret, sizeof(ret), "/usr/local/etc/%s", hcname);
278 if(!access(ret, R_OK))
279 return(ret);
280 }
281 if(filldef)
282 {
48a55119 283 if(getenv("HOME") != NULL)
d3372da9 284 snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME"));
48a55119 285 else
d3372da9 286 snprintf(ret, sizeof(ret), "/etc/%s", hcname);
287 return(ret);
288 } else {
289 return(NULL);
290 }
291}
292
293static struct hashcache *findhashcache(dev_t dev, ino_t inode)
294{
295 struct hashcache *hc;
296
297 for(hc = hashcache; hc != NULL; hc = hc->next)
298 {
299 if((hc->dev == dev) && (hc->inode == inode))
300 return(hc);
301 }
302 return(NULL);
303}
304
305static void readhashcache(void)
306{
307 int i, wc, line;
308 char *hcname;
309 FILE *stream;
310 char linebuf[256];
311 char *p, *p2, *wv[32], *hash;
312 struct hashcache *hc;
313 size_t len;
314
315 if((hcname = findhashcachefile(0)) == NULL)
316 return;
317 if((stream = fopen(hcname, "r")) == NULL)
318 {
319 flog(LOG_WARNING, "could not open hash cache %s: %s", hcname, strerror(errno));
320 return;
321 }
322 while(hashcache != NULL)
323 freehashcache(hashcache);
324 line = 0;
325 while(!feof(stream))
326 {
327 fgets(linebuf, sizeof(linebuf), stream);
328 line++;
329 for(p = linebuf; *p; p++)
330 {
331 if(*p == '\n')
332 *p = ' ';
333 }
334 if(linebuf[0] == '#')
335 continue;
336 for(wc = 0, p = linebuf; (wc < 32) && ((p2 = strchr(p, ' ')) != NULL); p = p2 + 1)
337 {
338 if(p2 == p)
339 continue;
340 *p2 = 0;
341 wv[wc++] = p;
342 }
343 if(wc < 3)
344 continue;
345 hc = newhashcache();
346 hc->dev = strtoll(wv[0], NULL, 10);
347 hc->inode = strtoll(wv[1], NULL, 10);
348 hc->mtime = strtoll(wv[2], NULL, 10);
349 for(i = 3; i < wc; i++)
350 {
351 if(!strcmp(wv[i], "tth"))
352 {
353 if(++i >= wc)
354 continue;
355 hash = base64decode(wv[i], &len);
356 if(len != 24)
357 {
358 free(hash);
359 continue;
360 }
361 memcpy(hc->tth, hash, 24);
362 free(hash);
363 }
364 }
365 }
366 fclose(stream);
367}
368
b00ef4d1 369static void hashtimercb(int cancelled, void *uudata)
370{
371 hashwritetimer = NULL;
372 if(!cancelled)
373 writehashcache(1);
374}
375
376static void writehashcache(int now)
d3372da9 377{
378 char *buf;
379 char *hcname;
380 FILE *stream;
381 struct hashcache *hc;
382
b00ef4d1 383 if(!now)
384 {
385 if(hashwritetimer == NULL)
386 hashwritetimer = timercallback(ntime() + 300, (void (*)(int, void *))hashtimercb, NULL);
387 return;
388 }
389 if(hashwritetimer != NULL)
390 canceltimer(hashwritetimer);
d3372da9 391 hcname = findhashcachefile(1);
392 if((stream = fopen(hcname, "w")) == NULL)
393 {
394 flog(LOG_WARNING, "could not write hash cache %s: %s", hcname, strerror(errno));
395 return;
396 }
397 fprintf(stream, "# Dolda Connect hash cache file\n");
398 fprintf(stream, "# Generated automatically, do not edit\n");
399 fprintf(stream, "# Format: DEVICE INODE MTIME [HASH...]\n");
400 fprintf(stream, "# HASH := HASHTYPE HASHVAL\n");
401 fprintf(stream, "# HASHTYPE can currently only be `tth'\n");
402 for(hc = hashcache; hc != NULL; hc = hc->next)
403 {
404 buf = base64encode(hc->tth, 24);
405 fprintf(stream, "%lli %lli %li tth %s\n", hc->dev, (long long)hc->inode, hc->mtime, buf);
406 free(buf);
407 }
408 fclose(stream);
409}
410
411static void hashread(struct socket *sk, void *uudata)
412{
413 static char *hashbuf;
414 static size_t hashbufsize = 0, hashbufdata = 0;
415 char *buf, *p, *p2, *lp;
416 size_t bufsize;
417 char *wv[32];
418 int wc;
419 dev_t dev;
420 ino_t inode;
421 time_t mtime;
422 struct hashcache *hc;
423
424 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
425 return;
426 bufcat(hashbuf, buf, bufsize);
427 free(buf);
428 while((lp = memchr(hashbuf, '\n', hashbufdata)) != NULL)
429 {
430 *(lp++) = 0;
431 wc = 0;
432 p = hashbuf;
433 while(1)
434 {
435 while((p2 = strchr(p, ' ')) == p)
436 p++;
437 wv[wc++] = p;
438 if(p2 == NULL)
439 {
440 break;
441 } else {
442 *p2 = 0;
443 p = p2 + 1;
444 }
445 }
446 if(wc != 4)
447 {
448 flog(LOG_ERR, "BUG: unexpected number of words (%i) arrived from hashing process", wc);
449 } else {
450 dev = strtoll(wv[0], NULL, 10);
451 inode = strtoll(wv[1], NULL, 10);
452 mtime = strtol(wv[2], NULL, 10);
453 if((hc = findhashcache(dev, inode)) == NULL)
454 {
455 hc = newhashcache();
456 hc->dev = dev;
457 hc->inode = inode;
458 }
459 hc->mtime = mtime;
460 buf = base64decode(wv[3], NULL);
461 memcpy(hc->tth, buf, 24);
462 free(buf);
b00ef4d1 463 writehashcache(0);
d3372da9 464 }
465 memmove(hashbuf, lp, hashbufdata -= (lp - hashbuf));
466 }
467}
468
6a050bf5 469static void hashexit(pid_t pid, int status, struct socket *outsock)
d3372da9 470{
471 if(pid != hashjob)
472 flog(LOG_ERR, "BUG: hashing process changed PID?! old: %i new %i", hashjob, pid);
473 if(status)
474 flog(LOG_WARNING, "hashing process exited with non-zero status: %i", status);
475 hashjob = 0;
476 checkhashes();
6a050bf5 477 putsock(outsock);
d3372da9 478}
479
480static int hashfile(char *path)
481{
482 int i, ret;
483 int fd;
484 int pfd[2];
485 char buf[4096];
486 struct stat sb;
487 struct tigertreehash tth;
488 char digest[24];
489 struct socket *outsock;
490
491 if((fd = open(path, O_RDONLY)) < 0)
492 {
493 flog(LOG_WARNING, "could not open %s for hashing: %s", path, strerror(errno));
494 return(1);
495 }
496 if(fstat(fd, &sb) < 0)
497 {
498 flog(LOG_WARNING, "could not stat %s while hashing: %s", path, strerror(errno));
499 close(fd);
500 return(1);
501 }
502 if(pipe(pfd) < 0)
503 {
504 flog(LOG_WARNING, "could not create pipe(!): %s", strerror(errno));
505 close(fd);
506 return(1);
507 }
508 hashjob = fork();
509 if(hashjob < 0)
510 {
511 flog(LOG_WARNING, "could not fork(!) hashing process: %s", strerror(errno));
512 close(fd);
513 close(pfd[0]);
514 close(pfd[1]);
515 return(1);
516 }
517 if(hashjob == 0)
518 {
519 nice(10);
520 signal(SIGHUP, SIG_DFL);
521 fd = dup2(fd, 4);
522 pfd[1] = dup2(pfd[1], 3);
523 dup2(fd, 0);
524 dup2(pfd[1], 1);
525 for(i = 3; i < FD_SETSIZE; i++)
526 close(i);
527 initlog();
528 inittigertree(&tth);
529 while((ret = read(0, buf, 4096)) > 0)
530 dotigertree(&tth, buf, ret);
531 if(ret < 0)
532 {
533 flog(LOG_WARNING, "could not read from %s while hashing: %s", path, strerror(errno));
534 exit(1);
535 }
536 synctigertree(&tth);
537 restigertree(&tth, digest);
538 ret = snprintf(buf, sizeof(buf), "%lli %lli %li %s\n", sb.st_dev, (long long)sb.st_ino, sb.st_mtime, base64encode(digest, 24));
539 write(1, buf, ret);
540 exit(0);
541 }
542 close(fd);
543 close(pfd[1]);
544 outsock = wrapsock(pfd[0]);
545 outsock->readcb = hashread;
6a050bf5 546 childcallback(hashjob, (void (*)(pid_t, int, void *))hashexit, outsock);
d3372da9 547 return(0);
548}
549
550/*
551 * Call only when hashjob == 0
552 */
553static void checkhashes(void)
554{
555 struct sharecache *node;
556 struct hashcache *hc;
557 char *path;
558
559 node = shareroot->child;
e194f2fd 560 for(node = shareroot->child; node != NULL; node = nextscnode(node))
d3372da9 561 {
e194f2fd 562 if(node->f.b.type != FILE_REG)
d3372da9 563 continue;
d3372da9 564 if(!node->f.b.hastth)
565 {
72a06ab4 566 if(((hc = findhashcache(node->dev, node->inode)) != NULL) && (hc->mtime == node->mtime))
d3372da9 567 {
568 memcpy(node->hashtth, hc->tth, 24);
569 node->f.b.hastth = 1;
570 GCBCHAINDOCB(sharechangecb, sharesize);
571 } else {
572 path = getfspath(node);
573 if(hashfile(path))
574 {
575 flog(LOG_WARNING, "could not hash %s, unsharing it", path);
576 freecache(node);
e194f2fd 577 free(path);
578 flog(LOG_INFO, "sharing %lli bytes", sharesize);
579 continue;
d3372da9 580 }
581 free(path);
582 return;
583 }
584 }
d3372da9 585 }
586}
587
588struct sharecache *nextscnode(struct sharecache *node)
589{
590 if(node->child != NULL)
591 return(node->child);
592 while(node->next == NULL)
593 {
594 node = node->parent;
595 if(node == shareroot)
596 return(NULL);
597 }
598 return(node->next);
599}
600
601static void freescan(struct scanstate *job)
602{
603 if(job->dd != NULL)
604 closedir(job->dd);
605 free(job);
606}
607
608/* No need for optimization; lookup isn't really that common */
609struct sharecache *findcache(struct sharecache *parent, wchar_t *name)
610{
611 struct sharecache *node;
612
613 for(node = parent->child; node != NULL; node = node->next)
614 {
615 if(!wcscmp(node->name, name))
616 return(node);
617 }
618 return(NULL);
619}
620
621static void attachcache(struct sharecache *parent, struct sharecache *node)
622{
623 node->parent = parent;
624 node->next = parent->child;
625 if(parent->child != NULL)
626 parent->child->prev = node;
627 parent->child = node;
628}
629
630static void detachcache(struct sharecache *node)
631{
632 if(node->next != NULL)
633 node->next->prev = node->prev;
634 if(node->prev != NULL)
635 node->prev->next = node->next;
636 if((node->parent != NULL) && (node->parent->child == node))
637 node->parent->child = node->next;
638 node->parent = NULL;
639 node->next = NULL;
640 node->prev = NULL;
641}
642
643static void freecache(struct sharecache *node)
644{
645 struct sharecache *cur, *next;
646 struct scanqueue *q, *nq, **fq;
647
648 detachcache(node);
649 fq = &scanqueue;
650 for(q = scanqueue; q != NULL; q = nq)
651 {
652 nq = q->next;
653 if(q->state->node == node)
654 {
655 flog(LOG_DEBUG, "freed node %ls cancelled queued scan", node->name);
656 freescan(q->state);
657 *fq = q->next;
658 free(q);
659 continue;
660 }
661 fq = &q->next;
662 }
663 if(node->child != NULL)
664 {
665 for(cur = node->child; cur != NULL; cur = next)
666 {
667 next = cur->next;
668 freecache(cur);
669 }
670 }
671 CBCHAINDOCB(node, share_delete, node);
672 CBCHAINFREE(node, share_delete);
673 sharesize -= node->size;
674 if(node->path != NULL)
675 free(node->path);
676 if(node->name != NULL)
677 free(node->name);
678 free(node);
679}
680
681static void freesharepoint(struct sharepoint *share)
682{
683 struct sharecache *node;
684
685 if(share->next != NULL)
686 share->next->prev = share->prev;
687 if(share->prev != NULL)
688 share->prev->next = share->next;
689 if(share == shares)
690 shares = share->next;
691 if((node = findcache(shareroot, share->name)) != NULL)
692 freecache(node);
693 free(share->path);
694 free(share->name);
695 free(share);
696}
697
698static struct sharecache *newcache(void)
699{
700 struct sharecache *new;
701
702 new = smalloc(sizeof(*new));
703 memset(new, 0, sizeof(*new));
704 CBCHAININIT(new, share_delete);
705 return(new);
706}
707
708char *getfspath(struct sharecache *node)
709{
710 char *buf, *mbsname;
711 size_t bufsize;
712
713 buf = smalloc(bufsize = 64);
714 *buf = 0;
715 while(node != NULL)
716 {
717 if(node->path != NULL)
718 {
719 if(bufsize < strlen(node->path) + strlen(buf) + 1)
720 buf = srealloc(buf, strlen(node->path) + strlen(buf) + 1);
721 memmove(buf + strlen(node->path), buf, strlen(buf) + 1);
722 memcpy(buf, node->path, strlen(node->path));
723 return(buf);
724 }
725 if((mbsname = icwcstombs(node->name, NULL)) == NULL)
726 {
727 flog(LOG_WARNING, "could not map unicode share name (%ls) into filesystem charset: %s", node->name, strerror(errno));
728 free(buf);
729 return(NULL);
730 }
731 while(bufsize < strlen(mbsname) + 1 + strlen(buf) + 1)
732 buf = srealloc(buf, bufsize *= 2);
733 memmove(buf + strlen(mbsname) + 1, buf, strlen(buf) + 1);
734 memcpy(buf + 1, mbsname, strlen(mbsname));
735 *buf = '/';
736 free(mbsname);
737 node = node->parent;
738 }
739 buf = srealloc(buf, strlen(buf) + 1);
740 return(buf);
741}
742
743static int checknode(struct sharecache *node)
744{
745 char *path;
746 struct stat sb;
747
748 if(node->parent == NULL)
749 {
750 return(1);
751 } else {
752 if(!checknode(node->parent))
753 return(0);
754 path = getfspath(node);
755 if(stat(path, &sb) < 0)
756 {
757 flog(LOG_INFO, "%s was found to be broken (%s); scheduling rescan of parent", path, strerror(errno));
758 queuescan(node->parent);
759 return(0);
760 } else {
761 return(1);
762 }
763 }
764}
765
766int opensharecache(struct sharecache *node)
767{
768 char *path;
769 int fd, errbak;
770
771 path = getfspath(node);
772 fd = open(path, O_RDONLY);
773 errbak = errno;
774 if(fd < 0)
775 {
776 flog(LOG_WARNING, "could not open %s: %s", path, strerror(errbak));
777 checknode(node);
778 }
779 free(path);
780 errno = errbak;
781 return(fd);
782}
783
784static struct scanstate *newscan(struct sharecache *node)
785{
786 struct scanstate *new;
787
788 new = smalloc(sizeof(*new));
789 new->next = NULL;
790 new->node = node;
791 new->dd = NULL;
792 return(new);
793}
794
795void queuescan(struct sharecache *node)
796{
797 struct scanqueue *new;
798
799 new = smalloc(sizeof(*new));
800 new->state = newscan(node);
801 new->next = scanqueue;
802 scanqueue = new;
803}
804
805/* For internal use in doscan() */
806static void removestale(struct sharecache *node)
807{
808 struct sharecache *cur, *next;
809
810 for(cur = node->child; cur != NULL; cur = next)
811 {
812 next = cur->next;
813 if(!cur->f.b.found)
814 freecache(cur);
815 }
816}
817
818/* For internal use in doscan() */
819static void jobdone(void)
820{
821 struct scanstate *jbuf;
822
823 jbuf = scanjob;
824 scanjob = jbuf->next;
825 freescan(jbuf);
826 if(scanjob != NULL)
827 fchdir(dirfd(scanjob->dd));
828}
829
830int doscan(int quantum)
831{
832 char *path;
833 wchar_t *wcs;
834 int type;
835 struct sharecache *n;
836 struct scanstate *jbuf;
837 struct scanqueue *qbuf;
838 struct dirent *de;
839 struct stat sb;
840 struct hashcache *hc;
841 int dmask, fmask;
842 static int busybefore = 0;
843
844 dmask = confgetint("cli", "scandirmask");
845 fmask = confgetint("cli", "scanfilemask");
846 if((scanjob != NULL) && (scanjob->dd != NULL))
847 {
848 while(fchdir(dirfd(scanjob->dd)) < 0)
849 {
850 flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno));
851 removestale(scanjob->node);
852 jobdone();
853 }
854 }
855 while(quantum-- > 0)
856 {
857 if(scanjob != NULL)
858 {
859 busybefore = 1;
860 } else {
861 while(scanjob == NULL)
862 {
863 if(scanqueue == NULL)
864 {
865 if(busybefore)
866 {
867 flog(LOG_INFO, "sharing %lli bytes", sharesize);
868 busybefore = 0;
869 GCBCHAINDOCB(sharechangecb, sharesize);
870 if(hashjob == 0)
871 checkhashes();
872 }
873 return(0);
874 }
875 busybefore = 1;
876 scanjob = scanqueue->state;
877 qbuf = scanqueue;
878 scanqueue = qbuf->next;
879 free(qbuf);
880 for(n = scanjob->node->child; n != NULL; n = n->next)
881 n->f.b.found = 0;
882 }
883 }
884 if(scanjob->dd == NULL)
885 {
886 path = getfspath(scanjob->node);
887 if((scanjob->dd = opendir(path)) == NULL)
888 {
889 flog(LOG_WARNING, "cannot open directory %s for scanning: %s, deleting from share", path, strerror(errno));
890 freecache(scanjob->node);
891 free(path);
892 jobdone();
893 continue;
894 }
895 free(path);
896 if(fchdir(dirfd(scanjob->dd)) < 0)
897 {
898 flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno));
899 jobdone();
900 continue;
901 }
902 }
903 if((de = readdir(scanjob->dd)) == NULL)
904 {
905 removestale(scanjob->node);
906 jobdone();
907 continue;
908 }
909 if(*de->d_name == '.')
910 continue;
911 if((wcs = icmbstowcs(de->d_name, NULL)) == NULL)
912 {
913 flog(LOG_WARNING, "file name %s has cannot be converted to wchar: %s", de->d_name, strerror(errno));
914 continue;
915 }
916 n = findcache(scanjob->node, wcs);
917 if(stat(de->d_name, &sb) < 0)
918 {
919 free(wcs);
920 if(n != NULL)
921 {
922 flog(LOG_WARNING, "could not stat %s: %s, deleting from share", de->d_name, strerror(errno));
923 freecache(n);
924 } else {
925 flog(LOG_WARNING, "could not stat %s: %s", de->d_name, strerror(errno));
926 }
927 continue;
928 }
929 if(S_ISDIR(sb.st_mode))
930 {
931 if(~sb.st_mode & dmask)
932 {
933 free(wcs);
934 continue;
935 }
936 type = FILE_DIR;
937 } else if(S_ISREG(sb.st_mode)) {
938 if(~sb.st_mode & fmask)
939 {
940 free(wcs);
941 continue;
942 }
943 type = FILE_REG;
944 } else {
6c21fc1d 945 flog(LOG_WARNING, "unhandled file type: 0%o", sb.st_mode);
d3372da9 946 free(wcs);
947 continue;
948 }
949 if(n != NULL)
950 {
951 if((n->f.b.type != type) || (n->mtime != sb.st_mtime) || ((type == FILE_REG) && (n->size != sb.st_size)))
952 {
953 freecache(n);
954 n = NULL;
955 }
956 }
957 if(n == NULL)
958 {
959 n = newcache();
960 n->name = wcs;
961 if(S_ISREG(sb.st_mode))
962 {
963 sharesize += (n->size = sb.st_size);
964 } else {
965 n->size = 0;
966 }
967 n->mtime = sb.st_mtime;
968 n->dev = sb.st_dev;
969 n->inode = sb.st_ino;
970 n->f.b.type = type;
971 attachcache(scanjob->node, n);
972 } else {
973 free(wcs);
974 }
975 n->f.b.found = 1;
976 if(n->f.b.type == FILE_DIR)
977 {
978 jbuf = newscan(n);
979 jbuf->next = scanjob;
980 scanjob = jbuf;
981 } else if(n->f.b.type == FILE_REG) {
982 if(n->f.b.hastth && (n->mtime != sb.st_mtime))
983 n->f.b.hastth = 0;
984 if(!n->f.b.hastth)
985 {
986 if((hc = findhashcache(sb.st_dev, sb.st_ino)) != NULL)
987 {
988 if(hc->mtime == n->mtime)
989 {
990 n->f.b.hastth = 1;
991 memcpy(n->hashtth, hc->tth, 24);
992 } else {
993 freehashcache(hc);
994 }
995 }
996 }
997 }
998 }
999 return(1);
1000}
1001
1002void scanshares(void)
1003{
1004 struct sharepoint *cur;
1005 struct sharecache *node;
1006 struct stat sb;
1007
1008 for(cur = shares; cur != NULL; cur = cur->next)
1009 {
1010 if((node = findcache(shareroot, cur->name)) == NULL)
1011 {
1012 if(stat(cur->path, &sb))
1013 {
1014 flog(LOG_WARNING, "could not stat share \"%ls\": %s", cur->name, strerror(errno));
1015 continue;
1016 }
1017 if(!S_ISDIR(sb.st_mode))
1018 {
1019 flog(LOG_WARNING, "%s is not a directory; won't share it", cur->path);
1020 continue;
1021 }
1022 node = newcache();
1023 node->name = swcsdup(cur->name);
1024 node->path = sstrdup(cur->path);
1025 if(node->path[strlen(node->path) - 1] == '/')
1026 node->path[strlen(node->path) - 1] = 0;
1027 node->f.b.type = FILE_DIR;
1028 attachcache(shareroot, node);
1029 }
1030 queuescan(node);
1031 }
1032}
1033
1034static void preinit(int hup)
1035{
1036 struct sharepoint *cur;
1037
1038 if(hup)
1039 {
1040 for(cur = shares; cur != NULL; cur = cur->next)
1041 cur->delete = 1;
1042 } else {
1043 shareroot = newcache();
1044 shareroot->name = swcsdup(L"");
1045 shareroot->f.b.type = FILE_DIR;
1046 }
1047}
1048
1049static int init(int hup)
1050{
1051 struct sharepoint *cur, *next;
1052
1053 readhashcache();
1054 for(cur = shares; cur != NULL; cur = next)
1055 {
1056 next = cur->next;
1057 if(cur->delete)
1058 freesharepoint(cur);
1059 }
1060 scanshares();
1061 if(!hup)
1062 while(doscan(100));
1063 return(0);
1064}
1065
1066static int run(void)
1067{
cd8a934e 1068 if(hashjob == -1)
1069 {
1070 hashjob = 0;
1071 checkhashes();
1072 }
d3372da9 1073 return(doscan(10));
1074}
1075
1076static void terminate(void)
1077{
1078 if(hashjob != 0)
1079 kill(hashjob, SIGHUP);
1080 while(shares != NULL)
1081 freesharepoint(shares);
1082 freecache(shareroot);
1083}
1084
1085static struct module me =
1086{
1087 .name = "cli",
1088 .conf =
1089 {
1090 .vars = myvars,
1091 .cmds = mycmds
1092 },
1093 .preinit = preinit,
1094 .init = init,
1095 .run = run,
1096 .terminate = terminate
1097};
1098
1099MODULE(me)