source: trunk/libtransmission/torrent.c @ 12545

Last change on this file since 12545 was 12540, checked in by jordan, 10 years ago

(trunk libT) possible fix for three related tickets. still needs more testing.
#3732 "Delete system files when removing torrent data"
#4224 "Folders don't get deleted"
#3871 "torrent-set-location does not delete old folder if only one file in torrent"

  • Property svn:keywords set to Date Rev Author Id
File size: 80.9 KB
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1/*
2 * This file Copyright (C) Mnemosyne LLC
3 *
4 * This file is licensed by the GPL version 2. Works owned by the
5 * Transmission project are granted a special exemption to clause 2(b)
6 * so that the bulk of its code can remain under the MIT license.
7 * This exemption does not extend to derived works not owned by
8 * the Transmission project.
9 *
10 * $Id: torrent.c 12540 2011-07-10 17:34:03Z jordan $
11 */
12
13#include <signal.h> /* signal() */
14#include <sys/types.h> /* stat */
15#include <sys/stat.h> /* stat */
16#ifndef WIN32
17 #include <sys/wait.h> /* wait() */
18#else
19 #include <process.h>
20 #define waitpid(pid, status, options)  _cwait(status, pid, WAIT_CHILD)
21#endif
22#include <unistd.h> /* stat */
23#include <dirent.h>
24
25#include <assert.h>
26#include <math.h>
27#include <stdarg.h>
28#include <string.h> /* memcmp */
29#include <stdlib.h> /* qsort */
30#include <stdio.h> /* remove() */
31
32#include <event2/util.h> /* evutil_vsnprintf() */
33
34#include "transmission.h"
35#include "announcer.h"
36#include "bandwidth.h"
37#include "bencode.h"
38#include "cache.h"
39#include "completion.h"
40#include "crypto.h" /* for tr_sha1 */
41#include "resume.h"
42#include "fdlimit.h" /* tr_fdTorrentClose */
43#include "inout.h" /* tr_ioTestPiece() */
44#include "magnet.h"
45#include "metainfo.h"
46#include "peer-common.h" /* MAX_BLOCK_SIZE */
47#include "peer-mgr.h"
48#include "platform.h" /* TR_PATH_DELIMITER_STR */
49#include "ptrarray.h"
50#include "session.h"
51#include "torrent.h"
52#include "torrent-magnet.h"
53#include "trevent.h" /* tr_runInEventThread() */
54#include "utils.h"
55#include "verify.h"
56#include "version.h"
57
58/***
59****
60***/
61
62#define tr_deeplog_tor( tor, ... ) \
63    do { \
64        if( tr_deepLoggingIsActive( ) ) \
65            tr_deepLog( __FILE__, __LINE__, tr_torrentName( tor ), __VA_ARGS__ ); \
66    } while( 0 )
67
68/***
69****
70***/
71
72const char *
73tr_torrentName( const tr_torrent * tor )
74{
75    assert( tr_isTorrent( tor ) );
76
77    return tor->info.name;
78}
79
80int
81tr_torrentId( const tr_torrent * tor )
82{
83    return tor->uniqueId;
84}
85
86tr_torrent*
87tr_torrentFindFromId( tr_session * session, int id )
88{
89    tr_torrent * tor = NULL;
90
91    while(( tor = tr_torrentNext( session, tor )))
92        if( tor->uniqueId == id )
93            return tor;
94
95    return NULL;
96}
97
98tr_torrent*
99tr_torrentFindFromHashString( tr_session *  session, const char * str )
100{
101    tr_torrent * tor = NULL;
102
103    while(( tor = tr_torrentNext( session, tor )))
104        if( !evutil_ascii_strcasecmp( str, tor->info.hashString ) )
105            return tor;
106
107    return NULL;
108}
109
110tr_torrent*
111tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
112{
113    tr_torrent * tor = NULL;
114
115    while(( tor = tr_torrentNext( session, tor )))
116        if( *tor->info.hash == *torrentHash )
117            if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
118                return tor;
119
120    return NULL;
121}
122
123tr_torrent*
124tr_torrentFindFromMagnetLink( tr_session * session, const char * magnet )
125{
126    tr_magnet_info * info;
127    tr_torrent * tor = NULL;
128
129    if(( info = tr_magnetParse( magnet )))
130    {
131        tor = tr_torrentFindFromHash( session, info->hash );
132        tr_magnetFree( info );
133    }
134
135    return tor;
136}
137
138tr_torrent*
139tr_torrentFindFromObfuscatedHash( tr_session * session,
140                                  const uint8_t * obfuscatedTorrentHash )
141{
142    tr_torrent * tor = NULL;
143
144    while(( tor = tr_torrentNext( session, tor )))
145        if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
146                     SHA_DIGEST_LENGTH ) )
147            return tor;
148
149    return NULL;
150}
151
152bool
153tr_torrentIsPieceTransferAllowed( const tr_torrent  * tor,
154                                  tr_direction        direction )
155{
156    int limit;
157    bool allowed = true;
158
159    if( tr_torrentUsesSpeedLimit( tor, direction ) )
160        if( tr_torrentGetSpeedLimit_Bps( tor, direction ) <= 0 )
161            allowed = false;
162
163    if( tr_torrentUsesSessionLimits( tor ) )
164        if( tr_sessionGetActiveSpeedLimit_Bps( tor->session, direction, &limit ) )
165            if( limit <= 0 )
166                allowed = false;
167
168    return allowed;
169}
170
171/***
172****  PER-TORRENT UL / DL SPEEDS
173***/
174
175void
176tr_torrentSetSpeedLimit_Bps( tr_torrent * tor, tr_direction dir, int Bps )
177{
178    assert( tr_isTorrent( tor ) );
179    assert( tr_isDirection( dir ) );
180    assert( Bps >= 0 );
181
182    if( tr_bandwidthSetDesiredSpeed_Bps( &tor->bandwidth, dir, Bps ) )
183        tr_torrentSetDirty( tor );
184}
185void
186tr_torrentSetSpeedLimit_KBps( tr_torrent * tor, tr_direction dir, int KBps )
187{
188    tr_torrentSetSpeedLimit_Bps( tor, dir, toSpeedBytes( KBps ) );
189}
190
191int
192tr_torrentGetSpeedLimit_Bps( const tr_torrent * tor, tr_direction dir )
193{
194    assert( tr_isTorrent( tor ) );
195    assert( tr_isDirection( dir ) );
196
197    return tr_bandwidthGetDesiredSpeed_Bps( &tor->bandwidth, dir );
198}
199int
200tr_torrentGetSpeedLimit_KBps( const tr_torrent * tor, tr_direction dir )
201{
202    return toSpeedKBps( tr_torrentGetSpeedLimit_Bps( tor, dir ) );
203}
204
205void
206tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, bool do_use )
207{
208    assert( tr_isTorrent( tor ) );
209    assert( tr_isDirection( dir ) );
210
211    if( tr_bandwidthSetLimited( &tor->bandwidth, dir, do_use ) )
212        tr_torrentSetDirty( tor );
213}
214
215bool
216tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
217{
218    assert( tr_isTorrent( tor ) );
219    assert( tr_isDirection( dir ) );
220
221    return tr_bandwidthIsLimited( &tor->bandwidth, dir );
222}
223
224void
225tr_torrentUseSessionLimits( tr_torrent * tor, bool doUse )
226{
227    bool changed;
228
229    assert( tr_isTorrent( tor ) );
230
231    changed = tr_bandwidthHonorParentLimits( &tor->bandwidth, TR_UP, doUse );
232    changed |= tr_bandwidthHonorParentLimits( &tor->bandwidth, TR_DOWN, doUse );
233
234    if( changed )
235        tr_torrentSetDirty( tor );
236}
237
238bool
239tr_torrentUsesSessionLimits( const tr_torrent * tor )
240{
241    assert( tr_isTorrent( tor ) );
242
243    return tr_bandwidthAreParentLimitsHonored( &tor->bandwidth, TR_UP );
244}
245
246/***
247****
248***/
249
250void
251tr_torrentSetRatioMode( tr_torrent *  tor, tr_ratiolimit mode )
252{
253    assert( tr_isTorrent( tor ) );
254    assert( mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED  );
255
256    if( mode != tor->ratioLimitMode )
257    {
258        tor->ratioLimitMode = mode;
259
260        tr_torrentSetDirty( tor );
261    }
262}
263
264tr_ratiolimit
265tr_torrentGetRatioMode( const tr_torrent * tor )
266{
267    assert( tr_isTorrent( tor ) );
268
269    return tor->ratioLimitMode;
270}
271
272void
273tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
274{
275    assert( tr_isTorrent( tor ) );
276
277    if( (int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0) )
278    {
279        tor->desiredRatio = desiredRatio;
280
281        tr_torrentSetDirty( tor );
282    }
283}
284
285double
286tr_torrentGetRatioLimit( const tr_torrent * tor )
287{
288    assert( tr_isTorrent( tor ) );
289
290    return tor->desiredRatio;
291}
292
293bool
294tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
295{
296    bool isLimited;
297
298    switch( tr_torrentGetRatioMode( tor ) )
299    {
300        case TR_RATIOLIMIT_SINGLE:
301            isLimited = true;
302            if( ratio )
303                *ratio = tr_torrentGetRatioLimit( tor );
304            break;
305
306        case TR_RATIOLIMIT_GLOBAL:
307            isLimited = tr_sessionIsRatioLimited( tor->session );
308            if( isLimited && ratio )
309                *ratio = tr_sessionGetRatioLimit( tor->session );
310            break;
311
312        default: /* TR_RATIOLIMIT_UNLIMITED */
313            isLimited = false;
314            break;
315    }
316
317    return isLimited;
318}
319
320/* returns true if the seed ratio applies --
321 * it applies if the torrent's a seed AND it has a seed ratio set */
322static bool
323tr_torrentGetSeedRatioBytes( tr_torrent  * tor,
324                             uint64_t    * setmeLeft,
325                             uint64_t    * setmeGoal )
326{
327    double seedRatio;
328    bool seedRatioApplies = false;
329
330    if( tr_torrentGetSeedRatio( tor, &seedRatio ) )
331    {
332        const uint64_t u = tor->uploadedCur + tor->uploadedPrev;
333        const uint64_t d = tor->downloadedCur + tor->downloadedPrev;
334        const uint64_t baseline = d ? d : tr_cpSizeWhenDone( &tor->completion );
335        const uint64_t goal = baseline * seedRatio;
336        if( setmeLeft ) *setmeLeft = goal > u ? goal - u : 0;
337        if( setmeGoal ) *setmeGoal = goal;
338        seedRatioApplies = tr_torrentIsSeed( tor );
339    }
340
341    return seedRatioApplies;
342}
343
344static bool
345tr_torrentIsSeedRatioDone( tr_torrent * tor )
346{
347    uint64_t bytesLeft;
348    return tr_torrentGetSeedRatioBytes( tor, &bytesLeft, NULL ) && !bytesLeft;
349}
350
351/***
352****
353***/
354
355void
356tr_torrentSetIdleMode( tr_torrent *  tor, tr_idlelimit mode )
357{
358    assert( tr_isTorrent( tor ) );
359    assert( mode==TR_IDLELIMIT_GLOBAL || mode==TR_IDLELIMIT_SINGLE || mode==TR_IDLELIMIT_UNLIMITED  );
360
361    if( mode != tor->idleLimitMode )
362    {
363        tor->idleLimitMode = mode;
364
365        tr_torrentSetDirty( tor );
366    }
367}
368
369tr_idlelimit
370tr_torrentGetIdleMode( const tr_torrent * tor )
371{
372    assert( tr_isTorrent( tor ) );
373
374    return tor->idleLimitMode;
375}
376
377void
378tr_torrentSetIdleLimit( tr_torrent * tor, uint16_t idleMinutes )
379{
380    assert( tr_isTorrent( tor ) );
381
382    if( idleMinutes > 0 )
383    {
384        tor->idleLimitMinutes = idleMinutes;
385
386        tr_torrentSetDirty( tor );
387    }
388}
389
390uint16_t
391tr_torrentGetIdleLimit( const tr_torrent * tor )
392{
393    assert( tr_isTorrent( tor ) );
394
395    return tor->idleLimitMinutes;
396}
397
398bool
399tr_torrentGetSeedIdle( const tr_torrent * tor, uint16_t * idleMinutes )
400{
401    bool isLimited;
402
403    switch( tr_torrentGetIdleMode( tor ) )
404    {
405        case TR_IDLELIMIT_SINGLE:
406            isLimited = true;
407            if( idleMinutes )
408                *idleMinutes = tr_torrentGetIdleLimit( tor );
409            break;
410
411        case TR_IDLELIMIT_GLOBAL:
412            isLimited = tr_sessionIsIdleLimited( tor->session );
413            if( isLimited && idleMinutes )
414                *idleMinutes = tr_sessionGetIdleLimit( tor->session );
415            break;
416
417        default: /* TR_IDLELIMIT_UNLIMITED */
418            isLimited = false;
419            break;
420    }
421
422    return isLimited;
423}
424
425static bool
426tr_torrentIsSeedIdleLimitDone( tr_torrent * tor )
427{
428    uint16_t idleMinutes;
429    return tr_torrentGetSeedIdle( tor, &idleMinutes )
430        && difftime(tr_time(), MAX(tor->startDate, tor->activityDate)) >= idleMinutes * 60u;
431}
432
433/***
434****
435***/
436
437void
438tr_torrentCheckSeedLimit( tr_torrent * tor )
439{
440    assert( tr_isTorrent( tor ) );
441
442    if( !tor->isRunning || !tr_torrentIsSeed( tor ) )
443        return;
444
445    /* if we're seeding and reach our seed ratio limit, stop the torrent */
446    if( tr_torrentIsSeedRatioDone( tor ) )
447    {
448        tr_torinf( tor, "Seed ratio reached; pausing torrent" );
449
450        tor->isStopping = true;
451
452        /* maybe notify the client */
453        if( tor->ratio_limit_hit_func != NULL )
454            tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
455    }
456    /* if we're seeding and reach our inactiviy limit, stop the torrent */
457    else if( tr_torrentIsSeedIdleLimitDone( tor ) )
458    {
459        tr_torinf( tor, "Seeding idle limit reached; pausing torrent" );
460
461        tor->isStopping = true;
462        tor->finishedSeedingByIdle = true;
463
464        /* maybe notify the client */
465        if( tor->idle_limit_hit_func != NULL )
466            tor->idle_limit_hit_func( tor, tor->idle_limit_hit_func_user_data );
467    }
468}
469
470/***
471****
472***/
473
474void
475tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
476{
477    va_list ap;
478
479    assert( tr_isTorrent( tor ) );
480
481    va_start( ap, fmt );
482    tor->error = TR_STAT_LOCAL_ERROR;
483    tor->errorTracker[0] = '\0';
484    evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
485    va_end( ap );
486
487    tr_torerr( tor, "%s", tor->errorString );
488
489    if( tor->isRunning )
490        tor->isStopping = true;
491}
492
493static void
494tr_torrentClearError( tr_torrent * tor )
495{
496    tor->error = TR_STAT_OK;
497    tor->errorString[0] = '\0';
498    tor->errorTracker[0] = '\0';
499}
500
501static void
502onTrackerResponse( tr_torrent * tor, const tr_tracker_event * event, void * unused UNUSED )
503{
504    switch( event->messageType )
505    {
506        case TR_TRACKER_PEERS:
507        {
508            size_t i;
509            const int8_t seedProbability = event->seedProbability;
510            const bool allAreSeeds = seedProbability == 100;
511
512             if( allAreSeeds )
513                tr_tordbg( tor, "Got %zu seeds from tracker", event->pexCount );
514            else
515                tr_tordbg( tor, "Got %zu peers from tracker", event->pexCount );
516
517            for( i = 0; i < event->pexCount; ++i )
518                tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, &event->pex[i], seedProbability );
519
520            if( allAreSeeds && tr_torrentIsPrivate( tor ) )
521                tr_peerMgrMarkAllAsSeeds( tor );
522
523            break;
524        }
525
526        case TR_TRACKER_WARNING:
527            tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
528            tor->error = TR_STAT_TRACKER_WARNING;
529            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
530            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
531            break;
532
533        case TR_TRACKER_ERROR:
534            tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
535            tor->error = TR_STAT_TRACKER_ERROR;
536            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
537            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
538            break;
539
540        case TR_TRACKER_ERROR_CLEAR:
541            if( tor->error != TR_STAT_LOCAL_ERROR )
542                tr_torrentClearError( tor );
543            break;
544    }
545}
546
547/***
548****
549****  TORRENT INSTANTIATION
550****
551***/
552
553static tr_piece_index_t
554getBytePiece( const tr_info * info, uint64_t byteOffset )
555{
556    assert( info );
557    assert( info->pieceSize != 0 );
558
559    return byteOffset / info->pieceSize;
560}
561
562static void
563initFilePieces( tr_info *       info,
564                tr_file_index_t fileIndex )
565{
566    tr_file * file;
567    uint64_t  firstByte, lastByte;
568
569    assert( info );
570    assert( fileIndex < info->fileCount );
571
572    file = &info->files[fileIndex];
573    firstByte = file->offset;
574    lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
575    file->firstPiece = getBytePiece( info, firstByte );
576    file->lastPiece = getBytePiece( info, lastByte );
577}
578
579static int
580pieceHasFile( tr_piece_index_t piece,
581              const tr_file *  file )
582{
583    return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
584}
585
586static tr_priority_t
587calculatePiecePriority( const tr_torrent * tor,
588                        tr_piece_index_t   piece,
589                        int                fileHint )
590{
591    tr_file_index_t i;
592    tr_priority_t priority = TR_PRI_LOW;
593
594    /* find the first file that has data in this piece */
595    if( fileHint >= 0 ) {
596        i = fileHint;
597        while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
598            --i;
599    } else {
600        for( i = 0; i < tor->info.fileCount; ++i )
601            if( pieceHasFile( piece, &tor->info.files[i] ) )
602                break;
603    }
604
605    /* the piece's priority is the max of the priorities
606     * of all the files in that piece */
607    for( ; i < tor->info.fileCount; ++i )
608    {
609        const tr_file * file = &tor->info.files[i];
610
611        if( !pieceHasFile( piece, file ) )
612            break;
613
614        priority = MAX( priority, file->priority );
615
616        /* when dealing with multimedia files, getting the first and
617           last pieces can sometimes allow you to preview it a bit
618           before it's fully downloaded... */
619        if( file->priority >= TR_PRI_NORMAL )
620            if( file->firstPiece == piece || file->lastPiece == piece )
621                priority = TR_PRI_HIGH;
622    }
623
624    return priority;
625}
626
627static void
628tr_torrentInitFilePieces( tr_torrent * tor )
629{
630    int * firstFiles;
631    tr_file_index_t f;
632    tr_piece_index_t p;
633    uint64_t offset = 0;
634    tr_info * inf = &tor->info;
635
636    /* assign the file offsets */
637    for( f=0; f<inf->fileCount; ++f ) {
638        inf->files[f].offset = offset;
639        offset += inf->files[f].length;
640        initFilePieces( inf, f );
641    }
642
643    /* build the array of first-file hints to give calculatePiecePriority */
644    firstFiles = tr_new( int, inf->pieceCount );
645    for( p=f=0; p<inf->pieceCount; ++p ) {
646        while( inf->files[f].lastPiece < p )
647            ++f;
648        firstFiles[p] = f;
649    }
650
651#if 0
652    /* test to confirm the first-file hints are correct */
653    for( p=0; p<inf->pieceCount; ++p ) {
654        f = firstFiles[p];
655        assert( inf->files[f].firstPiece <= p );
656        assert( inf->files[f].lastPiece >= p );
657        if( f > 0 )
658            assert( inf->files[f-1].lastPiece < p );
659        for( f=0; f<inf->fileCount; ++f )
660            if( pieceHasFile( p, &inf->files[f] ) )
661                break;
662        assert( (int)f == firstFiles[p] );
663    }
664#endif
665
666    for( p=0; p<inf->pieceCount; ++p )
667        inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
668
669    tr_free( firstFiles );
670}
671
672static void torrentStart( tr_torrent * tor );
673
674/**
675 * Decide on a block size. Constraints:
676 * (1) most clients decline requests over 16 KiB
677 * (2) pieceSize must be a multiple of block size
678 */
679uint32_t
680tr_getBlockSize( uint32_t pieceSize )
681{
682    uint32_t b = pieceSize;
683
684    while( b > MAX_BLOCK_SIZE )
685        b /= 2u;
686
687    if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
688        return 0;
689    return b;
690}
691
692static void refreshCurrentDir( tr_torrent * tor );
693
694static void
695torrentInitFromInfo( tr_torrent * tor )
696{
697    uint64_t t;
698    tr_info * info = &tor->info;
699
700    tor->blockSize = tr_getBlockSize( info->pieceSize );
701
702    if( info->pieceSize )
703        tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
704
705    if( !tor->lastPieceSize )
706        tor->lastPieceSize = info->pieceSize;
707
708    if( tor->blockSize )
709        tor->lastBlockSize = info->totalSize % tor->blockSize;
710
711    if( !tor->lastBlockSize )
712        tor->lastBlockSize = tor->blockSize;
713
714    tor->blockCount = tor->blockSize
715        ? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
716        : 0;
717
718    tor->blockCountInPiece = tor->blockSize
719        ? info->pieceSize / tor->blockSize
720        : 0;
721
722    tor->blockCountInLastPiece = tor->blockSize
723        ? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
724        : 0;
725
726    /* check our work */
727    if( tor->blockSize != 0 )
728        assert( ( info->pieceSize % tor->blockSize ) == 0 );
729    t = info->pieceCount - 1;
730    t *= info->pieceSize;
731    t += tor->lastPieceSize;
732    assert( t == info->totalSize );
733    t = tor->blockCount - 1;
734    t *= tor->blockSize;
735    t += tor->lastBlockSize;
736    assert( t == info->totalSize );
737    t = info->pieceCount - 1;
738    t *= tor->blockCountInPiece;
739    t += tor->blockCountInLastPiece;
740    assert( t == (uint64_t)tor->blockCount );
741
742    tr_cpConstruct( &tor->completion, tor );
743
744    tr_torrentInitFilePieces( tor );
745
746    tor->completeness = tr_cpGetStatus( &tor->completion );
747}
748
749static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
750
751void
752tr_torrentGotNewInfoDict( tr_torrent * tor )
753{
754    torrentInitFromInfo( tor );
755
756    tr_peerMgrOnTorrentGotMetainfo( tor );
757
758    tr_torrentFireMetadataCompleted( tor );
759}
760
761static bool
762hasAnyLocalData( const tr_torrent * tor )
763{
764    tr_file_index_t i;
765
766    for( i=0; i<tor->info.fileCount; ++i )
767        if( tr_torrentFindFile2( tor, i, NULL, NULL, NULL ) )
768            return true;
769
770    return false;
771}
772
773static bool
774setLocalErrorIfFilesDisappeared( tr_torrent * tor )
775{
776    const bool disappeared = ( tr_cpHaveTotal( &tor->completion ) > 0 ) && !hasAnyLocalData( tor );
777
778    if( disappeared )
779    {
780        tr_deeplog_tor( tor, "%s", "[LAZY] uh oh, the files disappeared" );
781        tr_torrentSetLocalError( tor, "%s", _( "No data found! Ensure your drives are connected or use \"Set Location\". To re-download, remove the torrent and re-add it." ) );
782    }
783
784    return disappeared;
785}
786
787static void
788torrentInit( tr_torrent * tor, const tr_ctor * ctor )
789{
790    int doStart;
791    uint64_t loaded;
792    const char * dir;
793    bool isNewTorrent;
794    struct stat st;
795    static int nextUniqueId = 1;
796    tr_session * session = tr_ctorGetSession( ctor );
797
798    assert( session != NULL );
799
800    tr_sessionLock( session );
801
802    tor->session   = session;
803    tor->uniqueId = nextUniqueId++;
804    tor->magicNumber = TORRENT_MAGIC_NUMBER;
805
806    tr_peerIdInit( tor->peer_id );
807
808    tr_sha1( tor->obfuscatedHash, "req2", 4,
809             tor->info.hash, SHA_DIGEST_LENGTH,
810             NULL );
811
812    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
813        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
814            tor->downloadDir = tr_strdup( dir );
815
816    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
817        dir = tr_sessionGetIncompleteDir( session );
818    if( tr_sessionIsIncompleteDirEnabled( session ) )
819        tor->incompleteDir = tr_strdup( dir );
820
821    tr_bandwidthConstruct( &tor->bandwidth, session, &session->bandwidth );
822
823    tor->bandwidth.priority = tr_ctorGetBandwidthPriority( ctor );
824
825    tor->error = TR_STAT_OK;
826
827    tor->finishedSeedingByIdle = false;
828
829    tr_peerMgrAddTorrent( session->peerMgr, tor );
830
831    assert( !tor->downloadedCur );
832    assert( !tor->uploadedCur );
833
834    tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
835                                                  overwritten by the resume file */
836
837    torrentInitFromInfo( tor );
838    loaded = tr_torrentLoadResume( tor, ~0, ctor );
839    tor->completeness = tr_cpGetStatus( &tor->completion );
840    setLocalErrorIfFilesDisappeared( tor );
841
842    tr_ctorInitTorrentPriorities( ctor, tor );
843    tr_ctorInitTorrentWanted( ctor, tor );
844
845    refreshCurrentDir( tor );
846
847    doStart = tor->isRunning;
848    tor->isRunning = 0;
849
850    if( !( loaded & TR_FR_SPEEDLIMIT ) )
851    {
852        tr_torrentUseSpeedLimit( tor, TR_UP, false );
853        tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
854        tr_torrentUseSpeedLimit( tor, TR_DOWN, false );
855        tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
856        tr_torrentUseSessionLimits( tor, true );
857    }
858
859    if( !( loaded & TR_FR_RATIOLIMIT ) )
860    {
861        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
862        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
863    }
864
865    if( !( loaded & TR_FR_IDLELIMIT ) )
866    {
867        tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
868        tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
869    }
870
871    /* add the torrent to tr_session.torrentList */
872    ++session->torrentCount;
873    if( session->torrentList == NULL )
874        session->torrentList = tor;
875    else {
876        tr_torrent * it = session->torrentList;
877        while( it->next != NULL )
878            it = it->next;
879        it->next = tor;
880    }
881
882    /* if we don't have a local .torrent file already, assume the torrent is new */
883    isNewTorrent = stat( tor->info.torrent, &st );
884
885    /* maybe save our own copy of the metainfo */
886    if( tr_ctorGetSave( ctor ) )
887    {
888        const tr_benc * val;
889        if( !tr_ctorGetMetainfo( ctor, &val ) )
890        {
891            const char * path = tor->info.torrent;
892            const int err = tr_bencToFile( val, TR_FMT_BENC, path );
893            if( err )
894                tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
895            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
896        }
897    }
898
899    tor->tiers = tr_announcerAddTorrent( tor, onTrackerResponse, NULL );
900
901    if( isNewTorrent )
902    {
903        tor->startAfterVerify = doStart;
904        tr_torrentVerify( tor );
905    }
906    else if( doStart )
907    {
908        torrentStart( tor );
909    }
910
911    tr_sessionUnlock( session );
912}
913
914static tr_parse_result
915torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
916                  bool * setmeHasInfo, int * dictLength )
917{
918    int             doFree;
919    bool            didParse;
920    bool            hasInfo = false;
921    tr_info         tmp;
922    const tr_benc * metainfo;
923    tr_session    * session = tr_ctorGetSession( ctor );
924    tr_parse_result result = TR_PARSE_OK;
925
926    if( setmeInfo == NULL )
927        setmeInfo = &tmp;
928    memset( setmeInfo, 0, sizeof( tr_info ) );
929
930    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
931        return TR_PARSE_ERR;
932
933    didParse = tr_metainfoParse( session, metainfo, setmeInfo,
934                                 &hasInfo, dictLength );
935    doFree = didParse && ( setmeInfo == &tmp );
936
937    if( !didParse )
938        result = TR_PARSE_ERR;
939
940    if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
941        result = TR_PARSE_ERR;
942
943    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
944        result = TR_PARSE_DUPLICATE;
945
946    if( doFree )
947        tr_metainfoFree( setmeInfo );
948
949    if( setmeHasInfo != NULL )
950        *setmeHasInfo = hasInfo;
951
952    return result;
953}
954
955tr_parse_result
956tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
957{
958    return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
959}
960
961tr_torrent *
962tr_torrentNew( const tr_ctor * ctor, int * setmeError )
963{
964    int len;
965    bool hasInfo;
966    tr_info tmpInfo;
967    tr_parse_result r;
968    tr_torrent * tor = NULL;
969
970    assert( ctor != NULL );
971    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
972
973    r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
974    if( r == TR_PARSE_OK )
975    {
976        tor = tr_new0( tr_torrent, 1 );
977        tor->info = tmpInfo;
978        if( hasInfo )
979            tor->infoDictLength = len;
980        torrentInit( tor, ctor );
981    }
982    else
983    {
984        if( r == TR_PARSE_DUPLICATE )
985            tr_metainfoFree( &tmpInfo );
986
987        if( setmeError )
988            *setmeError = r;
989    }
990
991    return tor;
992}
993
994/**
995***
996**/
997
998void
999tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
1000{
1001    assert( tr_isTorrent( tor  ) );
1002
1003    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
1004    {
1005        tr_free( tor->downloadDir );
1006        tor->downloadDir = tr_strdup( path );
1007        tr_torrentSetDirty( tor );
1008    }
1009
1010    refreshCurrentDir( tor );
1011}
1012
1013const char*
1014tr_torrentGetDownloadDir( const tr_torrent * tor )
1015{
1016    assert( tr_isTorrent( tor  ) );
1017
1018    return tor->downloadDir;
1019}
1020
1021const char *
1022tr_torrentGetCurrentDir( const tr_torrent * tor )
1023{
1024    assert( tr_isTorrent( tor  ) );
1025
1026    return tor->currentDir;
1027}
1028
1029
1030void
1031tr_torrentChangeMyPort( tr_torrent * tor )
1032{
1033    assert( tr_isTorrent( tor  ) );
1034
1035    if( tor->isRunning )
1036        tr_announcerChangeMyPort( tor );
1037}
1038
1039static inline void
1040tr_torrentManualUpdateImpl( void * vtor )
1041{
1042    tr_torrent * tor = vtor;
1043
1044    assert( tr_isTorrent( tor  ) );
1045
1046    if( tor->isRunning )
1047        tr_announcerManualAnnounce( tor );
1048}
1049
1050void
1051tr_torrentManualUpdate( tr_torrent * tor )
1052{
1053    assert( tr_isTorrent( tor  ) );
1054
1055    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1056}
1057
1058bool
1059tr_torrentCanManualUpdate( const tr_torrent * tor )
1060{
1061    return ( tr_isTorrent( tor  ) )
1062        && ( tor->isRunning )
1063        && ( tr_announcerCanManualAnnounce( tor ) );
1064}
1065
1066const tr_info *
1067tr_torrentInfo( const tr_torrent * tor )
1068{
1069    return tr_isTorrent( tor ) ? &tor->info : NULL;
1070}
1071
1072const tr_stat *
1073tr_torrentStatCached( tr_torrent * tor )
1074{
1075    const time_t now = tr_time( );
1076
1077    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1078         ? &tor->stats
1079         : tr_torrentStat( tor );
1080}
1081
1082void
1083tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1084{
1085    assert( tr_isTorrent( tor ) );
1086    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
1087
1088    tor->verifyState = state;
1089    tor->anyDate = tr_time( );
1090}
1091
1092tr_torrent_activity
1093tr_torrentGetActivity( tr_torrent * tor )
1094{
1095    assert( tr_isTorrent( tor ) );
1096
1097    tr_torrentRecheckCompleteness( tor );
1098
1099    if( tor->verifyState == TR_VERIFY_NOW )
1100        return TR_STATUS_CHECK;
1101    if( tor->verifyState == TR_VERIFY_WAIT )
1102        return TR_STATUS_CHECK_WAIT;
1103    if( !tor->isRunning )
1104        return TR_STATUS_STOPPED;
1105    if( tor->completeness == TR_LEECH )
1106        return TR_STATUS_DOWNLOAD;
1107
1108    return TR_STATUS_SEED;
1109}
1110
1111static double
1112getVerifyProgress( const tr_torrent * tor )
1113{
1114    tr_piece_index_t i, n;
1115    tr_piece_index_t checked = 0;
1116
1117    assert( tr_isTorrent( tor ) );
1118
1119    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1120        if( tor->info.pieces[i].timeChecked )
1121            ++checked;
1122
1123    return checked / (double)tor->info.pieceCount;
1124}
1125
1126const tr_stat *
1127tr_torrentStat( tr_torrent * tor )
1128{
1129    tr_stat *               s;
1130    uint64_t                now;
1131    uint64_t                seedRatioBytesLeft;
1132    uint64_t                seedRatioBytesGoal;
1133    bool                    seedRatioApplies;
1134    uint16_t                seedIdleMinutes;
1135
1136    if( !tor )
1137        return NULL;
1138
1139    assert( tr_isTorrent( tor ) );
1140    tr_torrentLock( tor );
1141
1142    tor->lastStatTime = tr_time( );
1143
1144    s = &tor->stats;
1145    s->id = tor->uniqueId;
1146    s->activity = tr_torrentGetActivity( tor );
1147    s->error = tor->error;
1148    tr_strlcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1149
1150    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1151
1152    tr_peerMgrTorrentStats( tor,
1153                            &s->peersConnected,
1154                            &s->webseedsSendingToUs,
1155                            &s->peersSendingToUs,
1156                            &s->peersGettingFromUs,
1157                            s->peersFrom );
1158
1159    now = tr_time_msec( );
1160    s->rawUploadSpeed_KBps     = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_UP ) );
1161    s->pieceUploadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_UP ) );
1162    s->rawDownloadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_DOWN ) );
1163    s->pieceDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_DOWN ) );
1164
1165    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1166    s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1167
1168    s->percentDone         = tr_cpPercentDone  ( &tor->completion );
1169    s->leftUntilDone       = tr_cpLeftUntilDone( &tor->completion );
1170    s->sizeWhenDone        = tr_cpSizeWhenDone ( &tor->completion );
1171    s->recheckProgress     = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1172    s->activityDate        = tor->activityDate;
1173    s->addedDate           = tor->addedDate;
1174    s->doneDate            = tor->doneDate;
1175    s->startDate           = tor->startDate;
1176    s->secondsSeeding      = tor->secondsSeeding;
1177    s->secondsDownloading  = tor->secondsDownloading;
1178
1179    if ((s->activity == TR_STATUS_DOWNLOAD || s->activity == TR_STATUS_SEED) && s->startDate != 0)
1180        s->idleSecs = difftime(tr_time(), MAX(s->startDate, s->activityDate));
1181    else
1182        s->idleSecs = -1;
1183
1184    s->corruptEver      = tor->corruptCur    + tor->corruptPrev;
1185    s->downloadedEver   = tor->downloadedCur + tor->downloadedPrev;
1186    s->uploadedEver     = tor->uploadedCur   + tor->uploadedPrev;
1187    s->haveValid        = tr_cpHaveValid( &tor->completion );
1188    s->haveUnchecked    = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1189    s->desiredAvailable = tr_peerMgrGetDesiredAvailable( tor );
1190
1191    s->ratio = tr_getRatio( s->uploadedEver,
1192                            s->downloadedEver ? s->downloadedEver : s->haveValid );
1193
1194    seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1195                                                         &seedRatioBytesGoal );
1196
1197    switch( s->activity )
1198    {
1199        /* etaXLSpeed exists because if we use the piece speed directly,
1200         * brief fluctuations cause the ETA to jump all over the place.
1201         * so, etaXLSpeed is a smoothed-out version of the piece speed
1202         * to dampen the effect of fluctuations */
1203
1204        case TR_STATUS_DOWNLOAD:
1205            if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1206                tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1207                    ? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1208                    : ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
1209                tor->etaDLSpeedCalculatedAt = now;
1210            }
1211
1212            if( s->leftUntilDone > s->desiredAvailable )
1213                s->eta = TR_ETA_NOT_AVAIL;
1214            else if( tor->etaDLSpeed_KBps < 1 )
1215                s->eta = TR_ETA_UNKNOWN;
1216            else
1217                s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1218
1219            s->etaIdle = TR_ETA_NOT_AVAIL;
1220            break;
1221
1222        case TR_STATUS_SEED: {
1223            if( !seedRatioApplies )
1224                s->eta = TR_ETA_NOT_AVAIL;
1225            else {
1226                if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1227                    tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1228                        ? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1229                        : ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
1230                    tor->etaULSpeedCalculatedAt = now;
1231                }
1232                if( tor->etaULSpeed_KBps < 1 )
1233                    s->eta = TR_ETA_UNKNOWN;
1234                else
1235                    s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1236            }
1237
1238            if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1239                s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1240            else
1241                s->etaIdle = TR_ETA_NOT_AVAIL;
1242            break;
1243        }
1244
1245        default:
1246            s->eta = TR_ETA_NOT_AVAIL;
1247            s->etaIdle = TR_ETA_NOT_AVAIL;
1248            break;
1249    }
1250
1251    /* s->haveValid is here to make sure a torrent isn't marked 'finished'
1252     * when the user hits "uncheck all" prior to starting the torrent... */
1253    s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1254
1255    if( !seedRatioApplies || s->finished )
1256        s->seedRatioPercentDone = 1;
1257    else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1258        s->seedRatioPercentDone = 0;
1259    else
1260        s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1261
1262    tr_torrentUnlock( tor );
1263
1264    /* test some of the constraints */
1265    assert( s->sizeWhenDone <= tor->info.totalSize );
1266    assert( s->leftUntilDone <= s->sizeWhenDone );
1267    assert( s->desiredAvailable <= s->leftUntilDone );
1268    return s;
1269}
1270
1271/***
1272****
1273***/
1274
1275static uint64_t
1276fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1277{
1278    uint64_t total = 0;
1279    const tr_file * f = &tor->info.files[index];
1280
1281    if( f->length )
1282    {
1283        tr_block_index_t first;
1284        tr_block_index_t last;
1285        tr_torGetFileBlockRange( tor, index, &first, &last );
1286
1287        if( first == last )
1288        {
1289            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1290                total = f->length;
1291        }
1292        else
1293        {
1294            /* the first block */
1295            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1296                total += tor->blockSize - ( f->offset % tor->blockSize );
1297
1298            /* the middle blocks */
1299            if( first + 1 < last ) {
1300                uint64_t u = tr_bitfieldCountRange( &tor->completion.blockBitfield, first+1, last );
1301                u *= tor->blockSize;
1302                total += u;
1303            }
1304
1305            /* the last block */
1306            if( tr_cpBlockIsComplete( &tor->completion, last ) )
1307                total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * last );
1308        }
1309    }
1310
1311    return total;
1312}
1313
1314tr_file_stat *
1315tr_torrentFiles( const tr_torrent * tor,
1316                 tr_file_index_t *  fileCount )
1317{
1318    tr_file_index_t       i;
1319    const tr_file_index_t n = tor->info.fileCount;
1320    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1321    tr_file_stat *        walk = files;
1322    const bool            isSeed = tor->completeness == TR_SEED;
1323
1324    assert( tr_isTorrent( tor ) );
1325
1326    for( i=0; i<n; ++i, ++walk ) {
1327        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1328        walk->bytesCompleted = b;
1329        walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1330    }
1331
1332    if( fileCount )
1333        *fileCount = n;
1334
1335    return files;
1336}
1337
1338void
1339tr_torrentFilesFree( tr_file_stat *            files,
1340                     tr_file_index_t fileCount UNUSED )
1341{
1342    tr_free( files );
1343}
1344
1345/***
1346****
1347***/
1348
1349double*
1350tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1351{
1352    double * ret = NULL;
1353
1354    if( tr_isTorrent( tor ) )
1355    {
1356        tr_torrentLock( tor );
1357        ret = tr_peerMgrWebSpeeds_KBps( tor );
1358        tr_torrentUnlock( tor );
1359    }
1360
1361    return ret;
1362}
1363
1364tr_peer_stat *
1365tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1366{
1367    tr_peer_stat * ret = NULL;
1368
1369    if( tr_isTorrent( tor ) )
1370    {
1371        tr_torrentLock( tor );
1372        ret = tr_peerMgrPeerStats( tor, peerCount );
1373        tr_torrentUnlock( tor );
1374    }
1375
1376    return ret;
1377}
1378
1379void
1380tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1381{
1382    tr_free( peers );
1383}
1384
1385tr_tracker_stat *
1386tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1387{
1388    tr_tracker_stat * ret = NULL;
1389
1390    if( tr_isTorrent( torrent ) )
1391    {
1392        tr_torrentLock( torrent );
1393        ret = tr_announcerStats( torrent, setmeTrackerCount );
1394        tr_torrentUnlock( torrent );
1395    }
1396
1397    return ret;
1398}
1399
1400void
1401tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1402{
1403    tr_announcerStatsFree( trackers, trackerCount );
1404}
1405
1406void
1407tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1408{
1409    if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1410    {
1411        tr_torrentLock( tor );
1412        tr_peerMgrTorrentAvailability( tor, tab, size );
1413        tr_torrentUnlock( tor );
1414    }
1415}
1416
1417void
1418tr_torrentAmountFinished( const tr_torrent * tor,
1419                          float *            tab,
1420                          int                size )
1421{
1422    assert( tr_isTorrent( tor ) );
1423
1424    tr_torrentLock( tor );
1425    tr_cpGetAmountDone( &tor->completion, tab, size );
1426    tr_torrentUnlock( tor );
1427}
1428
1429static void
1430tr_torrentResetTransferStats( tr_torrent * tor )
1431{
1432    tr_torrentLock( tor );
1433
1434    tor->downloadedPrev += tor->downloadedCur;
1435    tor->downloadedCur   = 0;
1436    tor->uploadedPrev   += tor->uploadedCur;
1437    tor->uploadedCur     = 0;
1438    tor->corruptPrev    += tor->corruptCur;
1439    tor->corruptCur      = 0;
1440
1441    tr_torrentSetDirty( tor );
1442
1443    tr_torrentUnlock( tor );
1444}
1445
1446void
1447tr_torrentSetHasPiece( tr_torrent *     tor,
1448                       tr_piece_index_t pieceIndex,
1449                       bool             has )
1450{
1451    assert( tr_isTorrent( tor ) );
1452    assert( pieceIndex < tor->info.pieceCount );
1453
1454    if( has )
1455        tr_cpPieceAdd( &tor->completion, pieceIndex );
1456    else
1457        tr_cpPieceRem( &tor->completion, pieceIndex );
1458}
1459
1460/***
1461****
1462***/
1463
1464static void
1465freeTorrent( tr_torrent * tor )
1466{
1467    tr_torrent * t;
1468    tr_session *  session = tor->session;
1469    tr_info *    inf = &tor->info;
1470
1471    assert( !tor->isRunning );
1472
1473    tr_sessionLock( session );
1474
1475    tr_peerMgrRemoveTorrent( tor );
1476
1477    tr_cpDestruct( &tor->completion );
1478
1479    tr_announcerRemoveTorrent( session->announcer, tor );
1480
1481    tr_free( tor->downloadDir );
1482    tr_free( tor->incompleteDir );
1483
1484    if( tor == session->torrentList )
1485        session->torrentList = tor->next;
1486    else for( t = session->torrentList; t != NULL; t = t->next ) {
1487        if( t->next == tor ) {
1488            t->next = tor->next;
1489            break;
1490        }
1491    }
1492
1493    assert( session->torrentCount >= 1 );
1494    session->torrentCount--;
1495
1496    tr_bandwidthDestruct( &tor->bandwidth );
1497
1498    tr_metainfoFree( inf );
1499    tr_free( tor );
1500
1501    tr_sessionUnlock( session );
1502}
1503
1504/**
1505***  Start/Stop Callback
1506**/
1507
1508static void
1509torrentStartImpl( void * vtor )
1510{
1511    time_t now;
1512    tr_torrent * tor = vtor;
1513
1514    assert( tr_isTorrent( tor ) );
1515
1516    tr_sessionLock( tor->session );
1517
1518    tr_torrentRecheckCompleteness( tor );
1519
1520    now = tr_time( );
1521    tor->isRunning = true;
1522    tor->completeness = tr_cpGetStatus( &tor->completion );
1523    tor->startDate = tor->anyDate = now;
1524    tr_torrentClearError( tor );
1525    tor->finishedSeedingByIdle = false;
1526
1527    tr_torrentResetTransferStats( tor );
1528    tr_announcerTorrentStarted( tor );
1529    tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1530    tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1531    tor->lpdAnnounceAt = now;
1532    tr_peerMgrStartTorrent( tor );
1533
1534    tr_sessionUnlock( tor->session );
1535}
1536
1537uint64_t
1538tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1539{
1540    tr_file_index_t i;
1541    uint64_t byte_count = 0;
1542    const tr_file_index_t n = tor->info.fileCount;
1543
1544    for( i=0; i<n; ++i )
1545    {
1546        struct stat sb;
1547        char * filename = tr_torrentFindFile( tor, i );
1548
1549        sb.st_size = 0;
1550        if( filename && !stat( filename, &sb ) )
1551            byte_count += sb.st_size;
1552
1553        tr_free( filename );
1554    }
1555
1556    return byte_count;
1557}
1558
1559static void
1560torrentStart( tr_torrent * tor )
1561{
1562    /* already running... */
1563    if( tor->isRunning )
1564        return;
1565
1566    /* don't allow the torrent to be started if the files disappeared */
1567    if( setLocalErrorIfFilesDisappeared( tor ) )
1568        return;
1569
1570    /* verifying right now... wait until that's done so
1571     * we'll know what completeness to use/announce */
1572    if( tor->verifyState != TR_VERIFY_NONE ) {
1573        tor->startAfterVerify = true;
1574        return;
1575    }
1576
1577    /* otherwise, start it now... */
1578    tr_sessionLock( tor->session );
1579
1580    /* allow finished torrents to be resumed */
1581    if( tr_torrentIsSeedRatioDone( tor ) ) {
1582        tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1583        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1584    }
1585
1586    /* corresponds to the peer_id sent as a tracker request parameter.
1587     * one tracker admin says: "When the same torrent is opened and
1588     * closed and opened again without quitting Transmission ...
1589     * change the peerid. It would help sometimes if a stopped event
1590     * was missed to ensure that we didn't think someone was cheating. */
1591    tr_peerIdInit( tor->peer_id );
1592    tor->isRunning = 1;
1593    tr_torrentSetDirty( tor );
1594    tr_runInEventThread( tor->session, torrentStartImpl, tor );
1595
1596    tr_sessionUnlock( tor->session );
1597}
1598
1599void
1600tr_torrentStart( tr_torrent * tor )
1601{
1602    if( tr_isTorrent( tor ) )
1603        torrentStart( tor );
1604}
1605
1606static void
1607torrentRecheckDoneImpl( void * vtor )
1608{
1609    tr_torrent * tor = vtor;
1610    assert( tr_isTorrent( tor ) );
1611
1612    tr_torrentRecheckCompleteness( tor );
1613
1614    if( tor->startAfterVerify ) {
1615        tor->startAfterVerify = false;
1616        torrentStart( tor );
1617    }
1618}
1619
1620static void
1621torrentRecheckDoneCB( tr_torrent * tor )
1622{
1623    assert( tr_isTorrent( tor ) );
1624
1625    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1626}
1627
1628static void
1629verifyTorrent( void * vtor )
1630{
1631    tr_torrent * tor = vtor;
1632
1633    tr_sessionLock( tor->session );
1634
1635    /* if the torrent's already being verified, stop it */
1636    tr_verifyRemove( tor );
1637
1638    /* if the torrent's running, stop it & set the restart-after-verify flag */
1639    if( tor->startAfterVerify || tor->isRunning ) {
1640        /* don't clobber isStopping */
1641        const bool startAfter = tor->isStopping ? false : true;
1642        tr_torrentStop( tor );
1643        tor->startAfterVerify = startAfter;
1644    }
1645
1646    if( setLocalErrorIfFilesDisappeared( tor ) )
1647        tor->startAfterVerify = false;
1648    else
1649        tr_verifyAdd( tor, torrentRecheckDoneCB );
1650
1651    tr_sessionUnlock( tor->session );
1652}
1653
1654void
1655tr_torrentVerify( tr_torrent * tor )
1656{
1657    if( tr_isTorrent( tor ) )
1658        tr_runInEventThread( tor->session, verifyTorrent, tor );
1659}
1660
1661void
1662tr_torrentSave( tr_torrent * tor )
1663{
1664    assert( tr_isTorrent( tor ) );
1665
1666    if( tor->isDirty )
1667    {
1668        tor->isDirty = false;
1669        tr_torrentSaveResume( tor );
1670    }
1671}
1672
1673static void
1674stopTorrent( void * vtor )
1675{
1676    tr_torrent * tor = vtor;
1677    tr_torinf( tor, "Pausing" );
1678
1679    assert( tr_isTorrent( tor ) );
1680
1681    tr_torrentLock( tor );
1682
1683    tr_verifyRemove( tor );
1684    tr_peerMgrStopTorrent( tor );
1685    tr_announcerTorrentStopped( tor );
1686    tr_cacheFlushTorrent( tor->session->cache, tor );
1687
1688    tr_fdTorrentClose( tor->session, tor->uniqueId );
1689
1690    if( !tor->isDeleting )
1691        tr_torrentSave( tor );
1692
1693    tr_torrentUnlock( tor );
1694}
1695
1696void
1697tr_torrentStop( tr_torrent * tor )
1698{
1699    assert( tr_isTorrent( tor ) );
1700
1701    if( tr_isTorrent( tor ) )
1702    {
1703        tr_sessionLock( tor->session );
1704
1705        tor->isRunning = 0;
1706        tor->isStopping = 0;
1707        tr_torrentSetDirty( tor );
1708        tr_runInEventThread( tor->session, stopTorrent, tor );
1709
1710        tr_sessionUnlock( tor->session );
1711    }
1712}
1713
1714static void
1715closeTorrent( void * vtor )
1716{
1717    tr_benc * d;
1718    tr_torrent * tor = vtor;
1719
1720    assert( tr_isTorrent( tor ) );
1721
1722    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1723    tr_bencDictAddInt( d, "id", tor->uniqueId );
1724    tr_bencDictAddInt( d, "date", tr_time( ) );
1725
1726    tr_torinf( tor, "%s", _( "Removing torrent" ) );
1727
1728    stopTorrent( tor );
1729
1730    if( tor->isDeleting )
1731    {
1732        tr_metainfoRemoveSaved( tor->session, &tor->info );
1733        tr_torrentRemoveResume( tor );
1734    }
1735
1736    tor->isRunning = 0;
1737    freeTorrent( tor );
1738}
1739
1740void
1741tr_torrentFree( tr_torrent * tor )
1742{
1743    if( tr_isTorrent( tor ) )
1744    {
1745        tr_session * session = tor->session;
1746        assert( tr_isSession( session ) );
1747        tr_sessionLock( session );
1748
1749        tr_torrentClearCompletenessCallback( tor );
1750        tr_runInEventThread( session, closeTorrent, tor );
1751
1752        tr_sessionUnlock( session );
1753    }
1754}
1755
1756struct remove_data
1757{
1758    tr_torrent   * tor;
1759    bool           deleteFlag;
1760    tr_fileFunc  * deleteFunc;
1761};
1762
1763static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1764
1765static void
1766removeTorrent( void * vdata )
1767{
1768    struct remove_data * data = vdata;
1769
1770    if( data->deleteFlag )
1771        tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1772
1773    tr_torrentClearCompletenessCallback( data->tor );
1774    closeTorrent( data->tor );
1775    tr_free( data );
1776}
1777
1778void
1779tr_torrentRemove( tr_torrent   * tor,
1780                  bool           deleteFlag,
1781                  tr_fileFunc    deleteFunc )
1782{
1783    struct remove_data * data;
1784
1785    assert( tr_isTorrent( tor ) );
1786    tor->isDeleting = 1;
1787
1788    data = tr_new0( struct remove_data, 1 );
1789    data->tor = tor;
1790    data->deleteFlag = deleteFlag;
1791    data->deleteFunc = deleteFunc;
1792    tr_runInEventThread( tor->session, removeTorrent, data );
1793}
1794
1795/**
1796***  Completeness
1797**/
1798
1799static const char *
1800getCompletionString( int type )
1801{
1802    switch( type )
1803    {
1804        /* Translators: this is a minor point that's safe to skip over, but FYI:
1805           "Complete" and "Done" are specific, different terms in Transmission:
1806           "Complete" means we've downloaded every file in the torrent.
1807           "Done" means we're done downloading the files we wanted, but NOT all
1808           that exist */
1809        case TR_PARTIAL_SEED:
1810            return _( "Done" );
1811
1812        case TR_SEED:
1813            return _( "Complete" );
1814
1815        default:
1816            return _( "Incomplete" );
1817    }
1818}
1819
1820static void
1821fireCompletenessChange( tr_torrent       * tor,
1822                        tr_completeness    status,
1823                        bool               wasRunning )
1824{
1825    assert( ( status == TR_LEECH )
1826         || ( status == TR_SEED )
1827         || ( status == TR_PARTIAL_SEED ) );
1828
1829    if( tor->completeness_func )
1830        tor->completeness_func( tor, status, wasRunning,
1831                                tor->completeness_func_user_data );
1832}
1833
1834void
1835tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1836                                   tr_torrent_completeness_func    func,
1837                                   void                          * user_data )
1838{
1839    assert( tr_isTorrent( tor ) );
1840
1841    tor->completeness_func = func;
1842    tor->completeness_func_user_data = user_data;
1843}
1844
1845void
1846tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1847{
1848    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1849}
1850
1851void
1852tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1853                                    tr_torrent_ratio_limit_hit_func  func,
1854                                    void                           * user_data )
1855{
1856    assert( tr_isTorrent( tor ) );
1857
1858    tor->ratio_limit_hit_func = func;
1859    tor->ratio_limit_hit_func_user_data = user_data;
1860}
1861
1862void
1863tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1864{
1865    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1866}
1867
1868void
1869tr_torrentSetIdleLimitHitCallback( tr_torrent                    * tor,
1870                                   tr_torrent_idle_limit_hit_func  func,
1871                                   void                          * user_data )
1872{
1873    assert( tr_isTorrent( tor ) );
1874
1875    tor->idle_limit_hit_func = func;
1876    tor->idle_limit_hit_func_user_data = user_data;
1877}
1878
1879void
1880tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1881{
1882    tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1883}
1884
1885static void
1886onSigCHLD( int i UNUSED )
1887{
1888    waitpid( -1, NULL, WNOHANG );
1889}
1890
1891static void
1892torrentCallScript( const tr_torrent * tor, const char * script )
1893{
1894    char timeStr[128];
1895    const time_t now = tr_time( );
1896
1897    tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1898    *strchr( timeStr,'\n' ) = '\0';
1899
1900    if( script && *script )
1901    {
1902        int i;
1903        char * cmd[] = { tr_strdup( script ), NULL };
1904        char * env[] = {
1905            tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1906            tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1907            tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1908            tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1909            tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1910            tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1911            NULL };
1912
1913        tr_torinf( tor, "Calling script \"%s\"", script );
1914
1915#ifdef WIN32
1916        _spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
1917#else
1918        signal( SIGCHLD, onSigCHLD );
1919
1920        if( !fork( ) )
1921        {
1922            for (i=0; env[i]; ++i)
1923                putenv(env[i]);
1924            execvp( script, cmd );
1925            _exit( 0 );
1926        }
1927#endif
1928
1929        for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
1930        for( i=0; env[i]; ++i ) tr_free( env[i] );
1931    }
1932}
1933
1934void
1935tr_torrentRecheckCompleteness( tr_torrent * tor )
1936{
1937    tr_completeness completeness;
1938
1939    assert( tr_isTorrent( tor ) );
1940
1941    tr_torrentLock( tor );
1942
1943    completeness = tr_cpGetStatus( &tor->completion );
1944
1945    if( completeness != tor->completeness )
1946    {
1947        const int recentChange = tor->downloadedCur != 0;
1948        const bool wasLeeching = !tr_torrentIsSeed( tor );
1949        const bool wasRunning = tor->isRunning;
1950
1951        if( recentChange )
1952        {
1953            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
1954                      getCompletionString( tor->completeness ),
1955                      getCompletionString( completeness ) );
1956        }
1957
1958        tor->completeness = completeness;
1959        tr_fdTorrentClose( tor->session, tor->uniqueId );
1960
1961        if( tr_torrentIsSeed( tor ) )
1962        {
1963            if( recentChange )
1964            {
1965                tr_announcerTorrentCompleted( tor );
1966                tor->doneDate = tor->anyDate = tr_time( );
1967            }
1968
1969            if( wasLeeching && wasRunning )
1970            {
1971                /* clear interested flag on all peers */
1972                tr_peerMgrClearInterest( tor );
1973
1974                /* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
1975                tr_torrentCheckSeedLimit( tor );
1976            }
1977
1978            if( tor->currentDir == tor->incompleteDir )
1979                tr_torrentSetLocation( tor, tor->downloadDir, true, NULL, NULL );
1980
1981            if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
1982                torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
1983        }
1984
1985        fireCompletenessChange( tor, completeness, wasRunning );
1986
1987        tr_torrentSetDirty( tor );
1988    }
1989
1990    tr_torrentUnlock( tor );
1991}
1992
1993/***
1994****
1995***/
1996
1997static void
1998tr_torrentFireMetadataCompleted( tr_torrent * tor )
1999{
2000    assert( tr_isTorrent( tor ) );
2001
2002    if( tor->metadata_func )
2003        tor->metadata_func( tor, tor->metadata_func_user_data );
2004}
2005
2006void
2007tr_torrentSetMetadataCallback( tr_torrent                * tor,
2008                               tr_torrent_metadata_func    func,
2009                               void                      * user_data )
2010{
2011    assert( tr_isTorrent( tor ) );
2012
2013    tor->metadata_func = func;
2014    tor->metadata_func_user_data = user_data;
2015}
2016
2017
2018/**
2019***  File priorities
2020**/
2021
2022void
2023tr_torrentInitFilePriority( tr_torrent *    tor,
2024                            tr_file_index_t fileIndex,
2025                            tr_priority_t   priority )
2026{
2027    tr_piece_index_t i;
2028    tr_file *        file;
2029
2030    assert( tr_isTorrent( tor ) );
2031    assert( fileIndex < tor->info.fileCount );
2032    assert( tr_isPriority( priority ) );
2033
2034    file = &tor->info.files[fileIndex];
2035    file->priority = priority;
2036    for( i = file->firstPiece; i <= file->lastPiece; ++i )
2037        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2038}
2039
2040void
2041tr_torrentSetFilePriorities( tr_torrent             * tor,
2042                             const tr_file_index_t  * files,
2043                             tr_file_index_t          fileCount,
2044                             tr_priority_t            priority )
2045{
2046    tr_file_index_t i;
2047    assert( tr_isTorrent( tor ) );
2048    tr_torrentLock( tor );
2049
2050    for( i = 0; i < fileCount; ++i )
2051        if( files[i] < tor->info.fileCount )
2052            tr_torrentInitFilePriority( tor, files[i], priority );
2053    tr_torrentSetDirty( tor );
2054    tr_peerMgrRebuildRequests( tor );
2055
2056    tr_torrentUnlock( tor );
2057}
2058
2059tr_priority_t*
2060tr_torrentGetFilePriorities( const tr_torrent * tor )
2061{
2062    tr_file_index_t i;
2063    tr_priority_t * p;
2064
2065    assert( tr_isTorrent( tor ) );
2066
2067    tr_torrentLock( tor );
2068    p = tr_new0( tr_priority_t, tor->info.fileCount );
2069    for( i = 0; i < tor->info.fileCount; ++i )
2070        p[i] = tor->info.files[i].priority;
2071    tr_torrentUnlock( tor );
2072
2073    return p;
2074}
2075
2076/**
2077***  File DND
2078**/
2079
2080static void
2081setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2082{
2083    const int8_t     dnd = !doDownload;
2084    tr_piece_index_t firstPiece;
2085    int8_t           firstPieceDND;
2086    tr_piece_index_t lastPiece;
2087    int8_t           lastPieceDND;
2088    tr_file_index_t  i;
2089    tr_file *        file = &tor->info.files[fileIndex];
2090
2091    file->dnd = dnd;
2092    firstPiece = file->firstPiece;
2093    lastPiece = file->lastPiece;
2094
2095    /* can't set the first piece to DND unless
2096       every file using that piece is DND */
2097    firstPieceDND = dnd;
2098    if( fileIndex > 0 )
2099    {
2100        for( i = fileIndex - 1; firstPieceDND; --i )
2101        {
2102            if( tor->info.files[i].lastPiece != firstPiece )
2103                break;
2104            firstPieceDND = tor->info.files[i].dnd;
2105            if( !i )
2106                break;
2107        }
2108    }
2109
2110    /* can't set the last piece to DND unless
2111       every file using that piece is DND */
2112    lastPieceDND = dnd;
2113    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2114    {
2115        if( tor->info.files[i].firstPiece != lastPiece )
2116            break;
2117        lastPieceDND = tor->info.files[i].dnd;
2118    }
2119
2120    if( firstPiece == lastPiece )
2121    {
2122        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2123    }
2124    else
2125    {
2126        tr_piece_index_t pp;
2127        tor->info.pieces[firstPiece].dnd = firstPieceDND;
2128        tor->info.pieces[lastPiece].dnd = lastPieceDND;
2129        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2130            tor->info.pieces[pp].dnd = dnd;
2131    }
2132}
2133
2134void
2135tr_torrentInitFileDLs( tr_torrent             * tor,
2136                       const tr_file_index_t  * files,
2137                       tr_file_index_t          fileCount,
2138                       bool                     doDownload )
2139{
2140    tr_file_index_t i;
2141
2142    assert( tr_isTorrent( tor ) );
2143
2144    tr_torrentLock( tor );
2145
2146    for( i=0; i<fileCount; ++i )
2147        if( files[i] < tor->info.fileCount )
2148            setFileDND( tor, files[i], doDownload );
2149
2150    tr_cpInvalidateDND( &tor->completion );
2151
2152    tr_torrentUnlock( tor );
2153}
2154
2155void
2156tr_torrentSetFileDLs( tr_torrent             * tor,
2157                      const tr_file_index_t  * files,
2158                      tr_file_index_t          fileCount,
2159                      bool                     doDownload )
2160{
2161    assert( tr_isTorrent( tor ) );
2162    tr_torrentLock( tor );
2163
2164    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2165    tr_torrentSetDirty( tor );
2166    tr_peerMgrRebuildRequests( tor );
2167
2168    tr_torrentUnlock( tor );
2169}
2170
2171/***
2172****
2173***/
2174
2175tr_priority_t
2176tr_torrentGetPriority( const tr_torrent * tor )
2177{
2178    assert( tr_isTorrent( tor ) );
2179
2180    return tor->bandwidth.priority;
2181}
2182
2183void
2184tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2185{
2186    assert( tr_isTorrent( tor ) );
2187    assert( tr_isPriority( priority ) );
2188
2189    if( tor->bandwidth.priority != priority )
2190    {
2191        tor->bandwidth.priority = priority;
2192
2193        tr_torrentSetDirty( tor );
2194    }
2195}
2196
2197/***
2198****
2199***/
2200
2201void
2202tr_torrentSetPeerLimit( tr_torrent * tor,
2203                        uint16_t     maxConnectedPeers )
2204{
2205    assert( tr_isTorrent( tor ) );
2206
2207    if ( tor->maxConnectedPeers != maxConnectedPeers )
2208    {
2209        tor->maxConnectedPeers = maxConnectedPeers;
2210
2211        tr_torrentSetDirty( tor );
2212    }
2213}
2214
2215uint16_t
2216tr_torrentGetPeerLimit( const tr_torrent * tor )
2217{
2218    assert( tr_isTorrent( tor ) );
2219
2220    return tor->maxConnectedPeers;
2221}
2222
2223/***
2224****
2225***/
2226
2227void
2228tr_torrentGetBlockLocation( const tr_torrent * tor,
2229                            tr_block_index_t   block,
2230                            tr_piece_index_t * piece,
2231                            uint32_t         * offset,
2232                            uint32_t         * length )
2233{
2234    uint64_t pos = block;
2235    pos *= tor->blockSize;
2236    *piece = pos / tor->info.pieceSize;
2237    *offset = pos - ( *piece * tor->info.pieceSize );
2238    *length = tr_torBlockCountBytes( tor, block );
2239}
2240
2241
2242tr_block_index_t
2243_tr_block( const tr_torrent * tor,
2244           tr_piece_index_t   index,
2245           uint32_t           offset )
2246{
2247    tr_block_index_t ret;
2248
2249    assert( tr_isTorrent( tor ) );
2250
2251    ret = index;
2252    ret *= ( tor->info.pieceSize / tor->blockSize );
2253    ret += offset / tor->blockSize;
2254    return ret;
2255}
2256
2257bool
2258tr_torrentReqIsValid( const tr_torrent * tor,
2259                      tr_piece_index_t   index,
2260                      uint32_t           offset,
2261                      uint32_t           length )
2262{
2263    int err = 0;
2264
2265    assert( tr_isTorrent( tor ) );
2266
2267    if( index >= tor->info.pieceCount )
2268        err = 1;
2269    else if( length < 1 )
2270        err = 2;
2271    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2272        err = 3;
2273    else if( length > MAX_BLOCK_SIZE )
2274        err = 4;
2275    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2276        err = 5;
2277
2278    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2279                              (unsigned long)index,
2280                              (unsigned long)offset,
2281                              (unsigned long)length,
2282                              err );
2283
2284    return !err;
2285}
2286
2287uint64_t
2288tr_pieceOffset( const tr_torrent * tor,
2289                tr_piece_index_t   index,
2290                uint32_t           offset,
2291                uint32_t           length )
2292{
2293    uint64_t ret;
2294
2295    assert( tr_isTorrent( tor ) );
2296
2297    ret = tor->info.pieceSize;
2298    ret *= index;
2299    ret += offset;
2300    ret += length;
2301    return ret;
2302}
2303
2304void
2305tr_torGetFileBlockRange( const tr_torrent        * tor,
2306                         const tr_file_index_t     file,
2307                         tr_block_index_t        * first,
2308                         tr_block_index_t        * last )
2309{
2310    const tr_file * f = &tor->info.files[file];
2311    uint64_t offset = f->offset;
2312    *first = offset / tor->blockSize;
2313    if( !f->length )
2314        *last = *first;
2315    else {
2316        offset += f->length - 1;
2317        *last = offset / tor->blockSize;
2318    }
2319}
2320
2321void
2322tr_torGetPieceBlockRange( const tr_torrent        * tor,
2323                          const tr_piece_index_t    piece,
2324                          tr_block_index_t        * first,
2325                          tr_block_index_t        * last )
2326{
2327    uint64_t offset = tor->info.pieceSize;
2328    offset *= piece;
2329    *first = offset / tor->blockSize;
2330    offset += ( tr_torPieceCountBytes( tor, piece ) - 1 );
2331    *last = offset / tor->blockSize;
2332}
2333
2334
2335/***
2336****
2337***/
2338
2339void
2340tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2341{
2342    assert( tr_isTorrent( tor ) );
2343    assert( pieceIndex < tor->info.pieceCount );
2344
2345    tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2346}
2347
2348void
2349tr_torrentSetChecked( tr_torrent * tor, time_t when )
2350{
2351    tr_piece_index_t i, n;
2352
2353    assert( tr_isTorrent( tor ) );
2354
2355    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2356        tor->info.pieces[i].timeChecked = when;
2357}
2358
2359bool
2360tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2361{
2362    const bool pass = tr_ioTestPiece( tor, pieceIndex );
2363
2364    tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2365    tr_torrentSetHasPiece( tor, pieceIndex, pass );
2366    tr_torrentSetPieceChecked( tor, pieceIndex );
2367    tor->anyDate = tr_time( );
2368    tr_torrentSetDirty( tor );
2369
2370    return pass;
2371}
2372
2373time_t
2374tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2375{
2376    time_t mtime = 0;
2377    if( !tr_fdFileGetCachedMTime( tor->session, tor->uniqueId, i, &mtime ) )
2378        tr_torrentFindFile2( tor, i, NULL, NULL, &mtime );
2379    return mtime;
2380}
2381
2382bool
2383tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2384{
2385    uint64_t unused;
2386    tr_file_index_t f;
2387    const tr_info * inf = tr_torrentInfo( tor );
2388
2389    /* if we've never checked this piece, then it needs to be checked */
2390    if( !inf->pieces[p].timeChecked )
2391        return true;
2392
2393    /* If we think we've completed one of the files in this piece,
2394     * but it's been modified since we last checked it,
2395     * then it needs to be rechecked */
2396    tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2397    for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2398        if( tr_cpFileIsComplete( &tor->completion, f ) )
2399            if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2400                return true;
2401
2402    return false;
2403}
2404
2405/***
2406****
2407***/
2408
2409static int
2410compareTrackerByTier( const void * va, const void * vb )
2411{
2412    const tr_tracker_info * a = va;
2413    const tr_tracker_info * b = vb;
2414
2415    /* sort by tier */
2416    if( a->tier != b->tier )
2417        return a->tier - b->tier;
2418
2419    /* get the effects of a stable sort by comparing the two elements' addresses */
2420    return a - b;
2421}
2422
2423bool
2424tr_torrentSetAnnounceList( tr_torrent             * tor,
2425                           const tr_tracker_info  * trackers_in,
2426                           int                      trackerCount )
2427{
2428    int i;
2429    tr_benc metainfo;
2430    bool ok = true;
2431    tr_tracker_info * trackers;
2432
2433    tr_torrentLock( tor );
2434
2435    assert( tr_isTorrent( tor ) );
2436
2437    /* ensure the trackers' tiers are in ascending order */
2438    trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2439    qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2440
2441    /* look for bad URLs */
2442    for( i=0; ok && i<trackerCount; ++i )
2443        if( !tr_urlIsValidTracker( trackers[i].announce ) )
2444            ok = false;
2445
2446    /* save to the .torrent file */
2447    if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2448    {
2449        bool hasInfo;
2450        tr_info tmpInfo;
2451
2452        /* remove the old fields */
2453        tr_bencDictRemove( &metainfo, "announce" );
2454        tr_bencDictRemove( &metainfo, "announce-list" );
2455
2456        /* add the new fields */
2457        if( trackerCount > 0 )
2458        {
2459            tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2460        }
2461        if( trackerCount > 1 )
2462        {
2463            int i;
2464            int prevTier = -1;
2465            tr_benc * tier = NULL;
2466            tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2467
2468            for( i=0; i<trackerCount; ++i ) {
2469                if( prevTier != trackers[i].tier ) {
2470                    prevTier = trackers[i].tier;
2471                    tier = tr_bencListAddList( announceList, 0 );
2472                }
2473                tr_bencListAddStr( tier, trackers[i].announce );
2474            }
2475        }
2476
2477        /* try to parse it back again, to make sure it's good */
2478        memset( &tmpInfo, 0, sizeof( tr_info ) );
2479        if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2480                              &hasInfo, &tor->infoDictLength ) )
2481        {
2482            /* it's good, so keep these new trackers and free the old ones */
2483
2484            tr_info swap;
2485            swap.trackers = tor->info.trackers;
2486            swap.trackerCount = tor->info.trackerCount;
2487            tor->info.trackers = tmpInfo.trackers;
2488            tor->info.trackerCount = tmpInfo.trackerCount;
2489            tmpInfo.trackers = swap.trackers;
2490            tmpInfo.trackerCount = swap.trackerCount;
2491
2492            tr_metainfoFree( &tmpInfo );
2493            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2494        }
2495
2496        /* cleanup */
2497        tr_bencFree( &metainfo );
2498
2499        /* if we had a tracker-related error on this torrent,
2500         * and that tracker's been removed,
2501         * then clear the error */
2502        if(    ( tor->error == TR_STAT_TRACKER_WARNING )
2503            || ( tor->error == TR_STAT_TRACKER_ERROR ) )
2504        {
2505            bool clear = true;
2506
2507            for( i=0; clear && i<trackerCount; ++i )
2508                if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2509                    clear = false;
2510
2511            if( clear )
2512                tr_torrentClearError( tor );
2513        }
2514
2515        /* tell the announcer to reload this torrent's tracker list */
2516        tr_announcerResetTorrent( tor->session->announcer, tor );
2517    }
2518
2519    tr_torrentUnlock( tor );
2520
2521    tr_free( trackers );
2522    return ok;
2523}
2524
2525/**
2526***
2527**/
2528
2529void
2530tr_torrentSetAddedDate( tr_torrent * tor,
2531                        time_t       t )
2532{
2533    assert( tr_isTorrent( tor ) );
2534
2535    tor->addedDate = t;
2536    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2537}
2538
2539void
2540tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2541{
2542    assert( tr_isTorrent( tor ) );
2543
2544    tor->activityDate = t;
2545    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2546}
2547
2548void
2549tr_torrentSetDoneDate( tr_torrent * tor,
2550                       time_t       t )
2551{
2552    assert( tr_isTorrent( tor ) );
2553
2554    tor->doneDate = t;
2555    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2556}
2557
2558/**
2559***
2560**/
2561
2562uint64_t
2563tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2564{
2565    tr_file_index_t i;
2566    uint64_t bytesLeft = 0;
2567
2568    assert( tr_isTorrent( tor ) );
2569
2570    for( i=0; i<tor->info.fileCount; ++i )
2571    {
2572        if( !tor->info.files[i].dnd )
2573        {
2574            struct stat sb;
2575            const uint64_t length = tor->info.files[i].length;
2576            char * path = tr_torrentFindFile( tor, i );
2577
2578            bytesLeft += length;
2579
2580            if( ( path != NULL ) && !stat( path, &sb )
2581                                 && S_ISREG( sb.st_mode )
2582                                 && ( (uint64_t)sb.st_size <= length ) )
2583                bytesLeft -= sb.st_size;
2584
2585            tr_free( path );
2586        }
2587    }
2588
2589    return bytesLeft;
2590}
2591
2592/****
2593*****  Removing the torrent's local data
2594****/
2595
2596static int
2597vstrcmp( const void * a, const void * b )
2598{
2599    return strcmp( a, b );
2600}
2601
2602static int
2603compareLongestFirst( const void * a, const void * b )
2604{
2605    const size_t alen = strlen( a );
2606    const size_t blen = strlen( b );
2607
2608    if( alen != blen )
2609        return alen > blen ? -1 : 1;
2610
2611    return vstrcmp( a, b );
2612}
2613
2614static void
2615addDirtyFile( const char  * root,
2616              const char  * filename,
2617              tr_ptrArray * dirtyFolders )
2618{
2619    char * dir = tr_dirname( filename );
2620
2621    /* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2622    while (     ( dir != NULL )
2623             && ( strlen( root ) <= strlen( dir ) )
2624             && ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2625    {
2626        char * tmp;
2627        tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2628
2629        tmp = tr_dirname( dir );
2630        tr_free( dir );
2631        dir = tmp;
2632    }
2633
2634    tr_free( dir );
2635}
2636
2637static bool
2638isSystemFile( const char * base )
2639{
2640    int i;
2641    static const char * stockFiles[] = { ".DS_Store", "desktop.ini", "Thumbs.db" };
2642    static const int stockFileCount = sizeof(stockFiles) / sizeof(stockFiles[0]);
2643
2644    for( i=0; i<stockFileCount; ++i )
2645        if( !strcmp( base, stockFiles[i] ) )
2646            return true;
2647
2648    /* check for resource forks. <http://support.apple.com/kb/TA20578> */
2649    if( !memcmp( base, "._", 2 ) )
2650        return true;
2651
2652    return false;
2653}
2654
2655static void
2656deleteLocalFile( const tr_torrent * tor, const char * filename, tr_fileFunc fileFunc )
2657{
2658    struct stat sb;
2659
2660    /* add safeguards for (1) making sure the file exists and
2661       (2) that we haven't somehow walked up past the torrent's top directory... */
2662    if( !stat( filename, &sb ) )
2663        if( !tr_is_same_file( tor->currentDir, filename ) )
2664            fileFunc( filename );
2665}
2666
2667static void
2668walkLocalData( const tr_torrent * tor,
2669               const char       * root,
2670               const char       * dir,
2671               const char       * base,
2672               tr_ptrArray      * torrentFiles,
2673               tr_ptrArray      * folders,
2674               tr_ptrArray      * dirtyFolders,
2675               tr_fileFunc        fileFunc )
2676{
2677    struct stat sb;
2678    char * buf = tr_buildPath( dir, base, NULL );
2679    int i = stat( buf, &sb );
2680
2681    if( !i )
2682    {
2683        DIR * odir = NULL;
2684
2685        if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2686        {
2687            struct dirent *d;
2688            tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2689            for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2690                if( d->d_name && strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2691                    walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders, fileFunc );
2692            closedir( odir );
2693        }
2694        else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2695        {
2696            if( isSystemFile( base ) )
2697                deleteLocalFile( tor, buf, fileFunc );
2698            else {
2699                 const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2700                const bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2701                if( !isTorrentFile )
2702                    addDirtyFile( root, buf, dirtyFolders );
2703            }
2704        }
2705    }
2706
2707    tr_free( buf );
2708}
2709
2710static void
2711deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2712{
2713    int i, n;
2714    char ** s;
2715    tr_file_index_t f;
2716    tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2717    tr_ptrArray folders      = TR_PTR_ARRAY_INIT;
2718    tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2719
2720    const char * firstFile = tor->info.files[0].name;
2721    const char * cpch = strchr( firstFile, TR_PATH_DELIMITER );
2722    char * tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2723    char * root = tr_buildPath( tor->currentDir, tmp, NULL );
2724
2725    for( f=0; f<tor->info.fileCount; ++f ) {
2726        tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2727        tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2728    }
2729
2730    /* build the set of folders and dirtyFolders */
2731    walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders, fileFunc );
2732
2733    /* try to remove entire folders first, so that the recycle bin will be tidy */
2734    s = (char**) tr_ptrArrayPeek( &folders, &n );
2735    for( i=0; i<n; ++i )
2736        if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2737            deleteLocalFile( tor, s[i], fileFunc );
2738
2739    /* now blow away any remaining torrent files, such as torrent files in dirty folders */
2740    for( i=0, n=tr_ptrArraySize( &torrentFiles ); i<n; ++i ) {
2741        char * path = tr_buildPath( tor->currentDir, tr_ptrArrayNth( &torrentFiles, i ), NULL );
2742        deleteLocalFile( tor, path, fileFunc );
2743        tr_free( path );
2744    }
2745
2746    /* Now clean out the directories left empty from the previous step.
2747     * Work from deepest to shallowest s.t. lower folders
2748     * won't prevent the upper folders from being deleted */
2749    {
2750        tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2751        s = (char**) tr_ptrArrayPeek( &folders, &n );
2752        for( i=0; i<n; ++i )
2753            if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2754                tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2755        s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2756        for( i=0; i<n; ++i )
2757            deleteLocalFile( tor, s[i], fileFunc );
2758        tr_ptrArrayDestruct( &cleanFolders, NULL );
2759    }
2760
2761    /* cleanup */
2762    tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2763    tr_ptrArrayDestruct( &folders, tr_free );
2764    tr_ptrArrayDestruct( &torrentFiles, tr_free );
2765    tr_free( root );
2766    tr_free( tmp );
2767}
2768
2769static void
2770tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2771{
2772    assert( tr_isTorrent( tor ) );
2773
2774    if( fileFunc == NULL )
2775        fileFunc = remove;
2776
2777    /* close all the files because we're about to delete them */
2778    tr_cacheFlushTorrent( tor->session->cache, tor );
2779    tr_fdTorrentClose( tor->session, tor->uniqueId );
2780
2781    deleteLocalData( tor, fileFunc );
2782}
2783
2784/***
2785****
2786***/
2787
2788struct LocationData
2789{
2790    bool move_from_old_location;
2791    volatile int * setme_state;
2792    volatile double * setme_progress;
2793    char * location;
2794    tr_torrent * tor;
2795};
2796
2797static void
2798setLocation( void * vdata )
2799{
2800    bool err = false;
2801    struct LocationData * data = vdata;
2802    tr_torrent * tor = data->tor;
2803    const bool do_move = data->move_from_old_location;
2804    const char * location = data->location;
2805    double bytesHandled = 0;
2806
2807    assert( tr_isTorrent( tor ) );
2808
2809    tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2810            tr_torrentName(tor), tor->currentDir, location );
2811
2812    tr_mkdirp( location, 0777 );
2813
2814    if( !tr_is_same_file( location, tor->currentDir ) )
2815    {
2816        tr_file_index_t i;
2817
2818        /* bad idea to move files while they're being verified... */
2819        tr_verifyRemove( tor );
2820
2821        /* try to move the files.
2822         * FIXME: there are still all kinds of nasty cases, like what
2823         * if the target directory runs out of space halfway through... */
2824        for( i=0; !err && i<tor->info.fileCount; ++i )
2825        {
2826            const tr_file * f = &tor->info.files[i];
2827            const char * oldbase;
2828            char * sub;
2829            if( tr_torrentFindFile2( tor, i, &oldbase, &sub, NULL ) )
2830            {
2831                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2832                char * newpath = tr_buildPath( location, sub, NULL );
2833
2834                tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2835
2836                if( do_move && !tr_is_same_file( oldpath, newpath ) )
2837                {
2838                    bool renamed = false;
2839                    errno = 0;
2840                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2841                    if( tr_moveFile( oldpath, newpath, &renamed ) )
2842                    {
2843                        err = true;
2844                        tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2845                                        oldpath, newpath, tr_strerror( errno ) );
2846                    }
2847                }
2848
2849                tr_free( newpath );
2850                tr_free( oldpath );
2851                tr_free( sub );
2852            }
2853
2854            if( data->setme_progress )
2855            {
2856                bytesHandled += f->length;
2857                *data->setme_progress = bytesHandled / tor->info.totalSize;
2858            }
2859        }
2860
2861        if( !err )
2862        {
2863            /* blow away the leftover subdirectories in the old location */
2864            if( do_move )
2865                tr_torrentDeleteLocalData( tor, remove );
2866
2867            /* set the new location and reverify */
2868            tr_torrentSetDownloadDir( tor, location );
2869        }
2870    }
2871
2872    if( !err && do_move )
2873    {
2874        tr_free( tor->incompleteDir );
2875        tor->incompleteDir = NULL;
2876        tor->currentDir = tor->downloadDir;
2877    }
2878
2879    if( data->setme_state )
2880        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2881
2882    /* cleanup */
2883    tr_free( data->location );
2884    tr_free( data );
2885}
2886
2887void
2888tr_torrentSetLocation( tr_torrent       * tor,
2889                       const char       * location,
2890                       bool               move_from_old_location,
2891                       volatile double  * setme_progress,
2892                       volatile int     * setme_state )
2893{
2894    struct LocationData * data;
2895
2896    assert( tr_isTorrent( tor ) );
2897
2898    if( setme_state )
2899        *setme_state = TR_LOC_MOVING;
2900    if( setme_progress )
2901        *setme_progress = 0;
2902
2903    /* run this in the libtransmission thread */
2904    data = tr_new( struct LocationData, 1 );
2905    data->tor = tor;
2906    data->location = tr_strdup( location );
2907    data->move_from_old_location = move_from_old_location;
2908    data->setme_state = setme_state;
2909    data->setme_progress = setme_progress;
2910    tr_runInEventThread( tor->session, setLocation, data );
2911}
2912
2913/***
2914****
2915***/
2916
2917void
2918tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
2919{
2920    char * sub;
2921    const char * base;
2922    const tr_info * inf = &tor->info;
2923    const tr_file * f = &inf->files[fileNum];
2924    tr_piece * p;
2925    const tr_piece * pend;
2926    const time_t now = tr_time( );
2927
2928    /* close the file so that we can reopen in read-only mode as needed */
2929    tr_fdFileClose( tor->session, tor, fileNum );
2930
2931    /* now that the file is complete and closed, we can start watching its
2932     * mtime timestamp for changes to know if we need to reverify pieces */
2933    for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
2934        p->timeChecked = now;
2935
2936    /* if the torrent's current filename isn't the same as the one in the
2937     * metadata -- for example, if it had the ".part" suffix appended to
2938     * it until now -- then rename it to match the one in the metadata */
2939    if( tr_torrentFindFile2( tor, fileNum, &base, &sub, NULL ) )
2940    {
2941        if( strcmp( sub, f->name ) )
2942        {
2943            char * oldpath = tr_buildPath( base, sub, NULL );
2944            char * newpath = tr_buildPath( base, f->name, NULL );
2945
2946            if( rename( oldpath, newpath ) )
2947                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
2948
2949            tr_free( newpath );
2950            tr_free( oldpath );
2951        }
2952
2953        tr_free( sub );
2954    }
2955}
2956
2957/***
2958****
2959***/
2960
2961#ifdef SYS_DARWIN
2962 #define TR_STAT_MTIME(sb) ((sb).st_mtimespec.tv_sec)
2963#else
2964 #define TR_STAT_MTIME(sb) ((sb).st_mtime)
2965#endif
2966
2967
2968static bool
2969fileExists( const char * filename, time_t * mtime )
2970{
2971    struct stat sb;
2972    const bool ok = !stat( filename, &sb );
2973
2974    if( ok && ( mtime != NULL ) )
2975        *mtime = TR_STAT_MTIME( sb );
2976
2977    return ok;
2978}
2979
2980bool
2981tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
2982                     const char ** base, char ** subpath, time_t * mtime )
2983{
2984    char * part = NULL;
2985    const tr_file * file;
2986    const char * b = NULL;
2987    const char * s = NULL;
2988
2989    assert( tr_isTorrent( tor ) );
2990    assert( fileNum < tor->info.fileCount );
2991
2992    file = &tor->info.files[fileNum];
2993
2994    if( b == NULL ) {
2995        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
2996        if( fileExists( filename, mtime ) ) {
2997            b = tor->downloadDir;
2998            s = file->name;
2999        }
3000        tr_free( filename );
3001    }
3002
3003    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3004        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3005        if( fileExists( filename, mtime ) ) {
3006            b = tor->incompleteDir;
3007            s = file->name;
3008        }
3009        tr_free( filename );
3010    }
3011
3012    if( b == NULL )
3013        part = tr_torrentBuildPartial( tor, fileNum );
3014
3015    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3016        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3017        if( fileExists( filename, mtime ) ) {
3018            b = tor->incompleteDir;
3019            s = part;
3020        }
3021        tr_free( filename );
3022    }
3023
3024    if( b == NULL) {
3025        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3026        if( fileExists( filename, mtime ) ) {
3027            b = tor->downloadDir;
3028            s = part;
3029        }
3030        tr_free( filename );
3031    }
3032
3033    if( base != NULL )
3034        *base = b;
3035    if( subpath != NULL )
3036        *subpath = tr_strdup( s );
3037
3038    tr_free( part );
3039    return b != NULL;
3040}
3041
3042char*
3043tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3044{
3045    char * subpath;
3046    char * ret = NULL;
3047    const char * base;
3048
3049    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath, NULL ) )
3050    {
3051        ret = tr_buildPath( base, subpath, NULL );
3052        tr_free( subpath );
3053    }
3054
3055    return ret;
3056}
3057
3058/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3059static void
3060refreshCurrentDir( tr_torrent * tor )
3061{
3062    const char * dir = NULL;
3063
3064    if( tor->incompleteDir == NULL )
3065        dir = tor->downloadDir;
3066    else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3067        dir = tor->incompleteDir;
3068    else if( !tr_torrentFindFile2( tor, 0, &dir, NULL, NULL ) )
3069        dir = tor->incompleteDir;
3070
3071    assert( dir != NULL );
3072    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
3073    tor->currentDir = dir;
3074}
3075
3076char*
3077tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3078{
3079    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3080}
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