source: trunk/libtransmission/torrent.c @ 13080

Last change on this file since 13080 was 13080, checked in by jordan, 10 years ago

(trunk libT) #4625 "Transmission 2.42 fails to build on Solaris 10: Undefined symbol 'mkdtemp'" -- fixed.

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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 13080 2011-11-10 03:31:43Z 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            break;
521        }
522
523        case TR_TRACKER_WARNING:
524            tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
525            tor->error = TR_STAT_TRACKER_WARNING;
526            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
527            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
528            break;
529
530        case TR_TRACKER_ERROR:
531            tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
532            tor->error = TR_STAT_TRACKER_ERROR;
533            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
534            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
535            break;
536
537        case TR_TRACKER_ERROR_CLEAR:
538            if( tor->error != TR_STAT_LOCAL_ERROR )
539                tr_torrentClearError( tor );
540            break;
541    }
542}
543
544/***
545****
546****  TORRENT INSTANTIATION
547****
548***/
549
550static tr_piece_index_t
551getBytePiece( const tr_info * info, uint64_t byteOffset )
552{
553    assert( info );
554    assert( info->pieceSize != 0 );
555
556    return byteOffset / info->pieceSize;
557}
558
559static void
560initFilePieces( tr_info *       info,
561                tr_file_index_t fileIndex )
562{
563    tr_file * file;
564    uint64_t  firstByte, lastByte;
565
566    assert( info );
567    assert( fileIndex < info->fileCount );
568
569    file = &info->files[fileIndex];
570    firstByte = file->offset;
571    lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
572    file->firstPiece = getBytePiece( info, firstByte );
573    file->lastPiece = getBytePiece( info, lastByte );
574}
575
576static int
577pieceHasFile( tr_piece_index_t piece,
578              const tr_file *  file )
579{
580    return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
581}
582
583static tr_priority_t
584calculatePiecePriority( const tr_torrent * tor,
585                        tr_piece_index_t   piece,
586                        int                fileHint )
587{
588    tr_file_index_t i;
589    tr_priority_t priority = TR_PRI_LOW;
590
591    /* find the first file that has data in this piece */
592    if( fileHint >= 0 ) {
593        i = fileHint;
594        while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
595            --i;
596    } else {
597        for( i = 0; i < tor->info.fileCount; ++i )
598            if( pieceHasFile( piece, &tor->info.files[i] ) )
599                break;
600    }
601
602    /* the piece's priority is the max of the priorities
603     * of all the files in that piece */
604    for( ; i < tor->info.fileCount; ++i )
605    {
606        const tr_file * file = &tor->info.files[i];
607
608        if( !pieceHasFile( piece, file ) )
609            break;
610
611        priority = MAX( priority, file->priority );
612
613        /* when dealing with multimedia files, getting the first and
614           last pieces can sometimes allow you to preview it a bit
615           before it's fully downloaded... */
616        if( file->priority >= TR_PRI_NORMAL )
617            if( file->firstPiece == piece || file->lastPiece == piece )
618                priority = TR_PRI_HIGH;
619    }
620
621    return priority;
622}
623
624static void
625tr_torrentInitFilePieces( tr_torrent * tor )
626{
627    int * firstFiles;
628    tr_file_index_t f;
629    tr_piece_index_t p;
630    uint64_t offset = 0;
631    tr_info * inf = &tor->info;
632
633    /* assign the file offsets */
634    for( f=0; f<inf->fileCount; ++f ) {
635        inf->files[f].offset = offset;
636        offset += inf->files[f].length;
637        initFilePieces( inf, f );
638    }
639
640    /* build the array of first-file hints to give calculatePiecePriority */
641    firstFiles = tr_new( int, inf->pieceCount );
642    for( p=f=0; p<inf->pieceCount; ++p ) {
643        while( inf->files[f].lastPiece < p )
644            ++f;
645        firstFiles[p] = f;
646    }
647
648#if 0
649    /* test to confirm the first-file hints are correct */
650    for( p=0; p<inf->pieceCount; ++p ) {
651        f = firstFiles[p];
652        assert( inf->files[f].firstPiece <= p );
653        assert( inf->files[f].lastPiece >= p );
654        if( f > 0 )
655            assert( inf->files[f-1].lastPiece < p );
656        for( f=0; f<inf->fileCount; ++f )
657            if( pieceHasFile( p, &inf->files[f] ) )
658                break;
659        assert( (int)f == firstFiles[p] );
660    }
661#endif
662
663    for( p=0; p<inf->pieceCount; ++p )
664        inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
665
666    tr_free( firstFiles );
667}
668
669static void torrentStart( tr_torrent * tor, bool bypass_queue );
670
671/**
672 * Decide on a block size. Constraints:
673 * (1) most clients decline requests over 16 KiB
674 * (2) pieceSize must be a multiple of block size
675 */
676uint32_t
677tr_getBlockSize( uint32_t pieceSize )
678{
679    uint32_t b = pieceSize;
680
681    while( b > MAX_BLOCK_SIZE )
682        b /= 2u;
683
684    if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
685        return 0;
686    return b;
687}
688
689static void refreshCurrentDir( tr_torrent * tor );
690
691static void
692torrentInitFromInfo( tr_torrent * tor )
693{
694    uint64_t t;
695    tr_info * info = &tor->info;
696
697    tor->blockSize = tr_getBlockSize( info->pieceSize );
698
699    if( info->pieceSize )
700        tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
701
702    if( !tor->lastPieceSize )
703        tor->lastPieceSize = info->pieceSize;
704
705    if( tor->blockSize )
706        tor->lastBlockSize = info->totalSize % tor->blockSize;
707
708    if( !tor->lastBlockSize )
709        tor->lastBlockSize = tor->blockSize;
710
711    tor->blockCount = tor->blockSize
712        ? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
713        : 0;
714
715    tor->blockCountInPiece = tor->blockSize
716        ? info->pieceSize / tor->blockSize
717        : 0;
718
719    tor->blockCountInLastPiece = tor->blockSize
720        ? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
721        : 0;
722
723    /* check our work */
724    if( tor->blockSize != 0 )
725        assert( ( info->pieceSize % tor->blockSize ) == 0 );
726    t = info->pieceCount - 1;
727    t *= info->pieceSize;
728    t += tor->lastPieceSize;
729    assert( t == info->totalSize );
730    t = tor->blockCount - 1;
731    t *= tor->blockSize;
732    t += tor->lastBlockSize;
733    assert( t == info->totalSize );
734    t = info->pieceCount - 1;
735    t *= tor->blockCountInPiece;
736    t += tor->blockCountInLastPiece;
737    assert( t == (uint64_t)tor->blockCount );
738
739    tr_cpConstruct( &tor->completion, tor );
740
741    tr_torrentInitFilePieces( tor );
742
743    tor->completeness = tr_cpGetStatus( &tor->completion );
744}
745
746static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
747
748void
749tr_torrentGotNewInfoDict( tr_torrent * tor )
750{
751    torrentInitFromInfo( tor );
752
753    tr_peerMgrOnTorrentGotMetainfo( tor );
754
755    tr_torrentFireMetadataCompleted( tor );
756}
757
758static bool
759hasAnyLocalData( const tr_torrent * tor )
760{
761    tr_file_index_t i;
762
763    for( i=0; i<tor->info.fileCount; ++i )
764        if( tr_torrentFindFile2( tor, i, NULL, NULL, NULL ) )
765            return true;
766
767    return false;
768}
769
770static bool
771setLocalErrorIfFilesDisappeared( tr_torrent * tor )
772{
773    const bool disappeared = ( tr_cpHaveTotal( &tor->completion ) > 0 ) && !hasAnyLocalData( tor );
774
775    if( disappeared )
776    {
777        tr_deeplog_tor( tor, "%s", "[LAZY] uh oh, the files disappeared" );
778        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." ) );
779    }
780
781    return disappeared;
782}
783
784static void
785torrentInit( tr_torrent * tor, const tr_ctor * ctor )
786{
787    int doStart;
788    uint64_t loaded;
789    const char * dir;
790    bool isNewTorrent;
791    struct stat st;
792    static int nextUniqueId = 1;
793    tr_session * session = tr_ctorGetSession( ctor );
794
795    assert( session != NULL );
796
797    tr_sessionLock( session );
798
799    tor->session   = session;
800    tor->uniqueId = nextUniqueId++;
801    tor->magicNumber = TORRENT_MAGIC_NUMBER;
802    tor->queuePosition = session->torrentCount;
803
804    tr_peerIdInit( tor->peer_id );
805
806    tr_sha1( tor->obfuscatedHash, "req2", 4,
807             tor->info.hash, SHA_DIGEST_LENGTH,
808             NULL );
809
810    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
811        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
812            tor->downloadDir = tr_strdup( dir );
813
814    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
815        dir = tr_sessionGetIncompleteDir( session );
816    if( tr_sessionIsIncompleteDirEnabled( session ) )
817        tor->incompleteDir = tr_strdup( dir );
818
819    tr_bandwidthConstruct( &tor->bandwidth, session, &session->bandwidth );
820
821    tor->bandwidth.priority = tr_ctorGetBandwidthPriority( ctor );
822
823    tor->error = TR_STAT_OK;
824
825    tor->finishedSeedingByIdle = false;
826
827    tr_peerMgrAddTorrent( session->peerMgr, tor );
828
829    assert( !tor->downloadedCur );
830    assert( !tor->uploadedCur );
831
832    tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
833                                                  overwritten by the resume file */
834
835    torrentInitFromInfo( tor );
836    loaded = tr_torrentLoadResume( tor, ~0, ctor );
837    tor->completeness = tr_cpGetStatus( &tor->completion );
838    setLocalErrorIfFilesDisappeared( tor );
839
840    tr_ctorInitTorrentPriorities( ctor, tor );
841    tr_ctorInitTorrentWanted( ctor, tor );
842
843    refreshCurrentDir( tor );
844
845    doStart = tor->isRunning;
846    tor->isRunning = 0;
847
848    if( !( loaded & TR_FR_SPEEDLIMIT ) )
849    {
850        tr_torrentUseSpeedLimit( tor, TR_UP, false );
851        tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
852        tr_torrentUseSpeedLimit( tor, TR_DOWN, false );
853        tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
854        tr_torrentUseSessionLimits( tor, true );
855    }
856
857    if( !( loaded & TR_FR_RATIOLIMIT ) )
858    {
859        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
860        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
861    }
862
863    if( !( loaded & TR_FR_IDLELIMIT ) )
864    {
865        tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
866        tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
867    }
868
869    /* add the torrent to tr_session.torrentList */
870    session->torrentCount++;
871    if( session->torrentList == NULL )
872        session->torrentList = tor;
873    else {
874        tr_torrent * it = session->torrentList;
875        while( it->next != NULL )
876            it = it->next;
877        it->next = tor;
878    }
879
880    /* if we don't have a local .torrent file already, assume the torrent is new */
881    isNewTorrent = stat( tor->info.torrent, &st );
882
883    /* maybe save our own copy of the metainfo */
884    if( tr_ctorGetSave( ctor ) )
885    {
886        const tr_benc * val;
887        if( !tr_ctorGetMetainfo( ctor, &val ) )
888        {
889            const char * path = tor->info.torrent;
890            const int err = tr_bencToFile( val, TR_FMT_BENC, path );
891            if( err )
892                tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
893            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
894        }
895    }
896
897    tor->tiers = tr_announcerAddTorrent( tor, onTrackerResponse, NULL );
898
899    if( isNewTorrent )
900    {
901        tor->startAfterVerify = doStart;
902        tr_torrentVerify( tor );
903    }
904    else if( doStart )
905    {
906        tr_torrentStart( tor );
907    }
908
909    tr_sessionUnlock( session );
910}
911
912static tr_parse_result
913torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
914                  bool * setmeHasInfo, int * dictLength )
915{
916    int             doFree;
917    bool            didParse;
918    bool            hasInfo = false;
919    tr_info         tmp;
920    const tr_benc * metainfo;
921    tr_session    * session = tr_ctorGetSession( ctor );
922    tr_parse_result result = TR_PARSE_OK;
923
924    if( setmeInfo == NULL )
925        setmeInfo = &tmp;
926    memset( setmeInfo, 0, sizeof( tr_info ) );
927
928    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
929        return TR_PARSE_ERR;
930
931    didParse = tr_metainfoParse( session, metainfo, setmeInfo,
932                                 &hasInfo, dictLength );
933    doFree = didParse && ( setmeInfo == &tmp );
934
935    if( !didParse )
936        result = TR_PARSE_ERR;
937
938    if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
939        result = TR_PARSE_ERR;
940
941    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
942        result = TR_PARSE_DUPLICATE;
943
944    if( doFree )
945        tr_metainfoFree( setmeInfo );
946
947    if( setmeHasInfo != NULL )
948        *setmeHasInfo = hasInfo;
949
950    return result;
951}
952
953tr_parse_result
954tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
955{
956    return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
957}
958
959tr_torrent *
960tr_torrentNew( const tr_ctor * ctor, int * setmeError )
961{
962    int len;
963    bool hasInfo;
964    tr_info tmpInfo;
965    tr_parse_result r;
966    tr_torrent * tor = NULL;
967
968    assert( ctor != NULL );
969    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
970
971    r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
972    if( r == TR_PARSE_OK )
973    {
974        tor = tr_new0( tr_torrent, 1 );
975        tor->info = tmpInfo;
976        if( hasInfo )
977            tor->infoDictLength = len;
978        torrentInit( tor, ctor );
979    }
980    else
981    {
982        if( r == TR_PARSE_DUPLICATE )
983            tr_metainfoFree( &tmpInfo );
984
985        if( setmeError )
986            *setmeError = r;
987    }
988
989    return tor;
990}
991
992/**
993***
994**/
995
996void
997tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
998{
999    assert( tr_isTorrent( tor  ) );
1000
1001    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
1002    {
1003        tr_free( tor->downloadDir );
1004        tor->downloadDir = tr_strdup( path );
1005        tr_torrentSetDirty( tor );
1006    }
1007
1008    refreshCurrentDir( tor );
1009}
1010
1011const char*
1012tr_torrentGetDownloadDir( const tr_torrent * tor )
1013{
1014    assert( tr_isTorrent( tor  ) );
1015
1016    return tor->downloadDir;
1017}
1018
1019const char *
1020tr_torrentGetCurrentDir( const tr_torrent * tor )
1021{
1022    assert( tr_isTorrent( tor  ) );
1023
1024    return tor->currentDir;
1025}
1026
1027
1028void
1029tr_torrentChangeMyPort( tr_torrent * tor )
1030{
1031    assert( tr_isTorrent( tor  ) );
1032
1033    if( tor->isRunning )
1034        tr_announcerChangeMyPort( tor );
1035}
1036
1037static inline void
1038tr_torrentManualUpdateImpl( void * vtor )
1039{
1040    tr_torrent * tor = vtor;
1041
1042    assert( tr_isTorrent( tor  ) );
1043
1044    if( tor->isRunning )
1045        tr_announcerManualAnnounce( tor );
1046}
1047
1048void
1049tr_torrentManualUpdate( tr_torrent * tor )
1050{
1051    assert( tr_isTorrent( tor  ) );
1052
1053    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1054}
1055
1056bool
1057tr_torrentCanManualUpdate( const tr_torrent * tor )
1058{
1059    return ( tr_isTorrent( tor  ) )
1060        && ( tor->isRunning )
1061        && ( tr_announcerCanManualAnnounce( tor ) );
1062}
1063
1064const tr_info *
1065tr_torrentInfo( const tr_torrent * tor )
1066{
1067    return tr_isTorrent( tor ) ? &tor->info : NULL;
1068}
1069
1070const tr_stat *
1071tr_torrentStatCached( tr_torrent * tor )
1072{
1073    const time_t now = tr_time( );
1074
1075    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1076         ? &tor->stats
1077         : tr_torrentStat( tor );
1078}
1079
1080void
1081tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1082{
1083    assert( tr_isTorrent( tor ) );
1084    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
1085
1086    tor->verifyState = state;
1087    tor->anyDate = tr_time( );
1088}
1089
1090static tr_torrent_activity
1091torrentGetActivity( const tr_torrent * tor )
1092{
1093    const bool is_seed = tr_torrentIsSeed( tor );
1094    assert( tr_isTorrent( tor ) );
1095
1096    if( tor->verifyState == TR_VERIFY_NOW )
1097        return TR_STATUS_CHECK;
1098
1099    if( tor->verifyState == TR_VERIFY_WAIT )
1100        return TR_STATUS_CHECK_WAIT;
1101
1102    if( tor->isRunning )
1103        return is_seed ? TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
1104
1105    if( tr_torrentIsQueued( tor ) ) {
1106        if( is_seed && tr_sessionGetQueueEnabled( tor->session, TR_UP ) )
1107            return TR_STATUS_SEED_WAIT;
1108        if( !is_seed && tr_sessionGetQueueEnabled( tor->session, TR_DOWN ) )
1109            return TR_STATUS_DOWNLOAD_WAIT;
1110    }
1111
1112    return TR_STATUS_STOPPED;
1113}
1114
1115tr_torrent_activity
1116tr_torrentGetActivity( tr_torrent * tor )
1117{
1118    /* FIXME: is this call still needed? */
1119    tr_torrentRecheckCompleteness( tor );
1120
1121    return torrentGetActivity( tor );
1122}
1123
1124static time_t
1125torrentGetIdleSecs( const tr_torrent * tor )
1126{
1127    int idle_secs;
1128    const tr_torrent_activity activity = torrentGetActivity( tor );
1129
1130    if ((activity == TR_STATUS_DOWNLOAD || activity == TR_STATUS_SEED) && tor->startDate != 0)
1131        idle_secs = difftime(tr_time(), MAX(tor->startDate, tor->activityDate));
1132    else
1133        idle_secs = -1;
1134
1135    return idle_secs;
1136}
1137
1138bool
1139tr_torrentIsStalled( const tr_torrent * tor )
1140{
1141    return tr_sessionGetQueueStalledEnabled( tor->session )
1142        && ( torrentGetIdleSecs( tor ) > ( tr_sessionGetQueueStalledMinutes( tor->session ) * 60 ) );
1143}
1144
1145
1146static double
1147getVerifyProgress( const tr_torrent * tor )
1148{
1149    tr_piece_index_t i, n;
1150    tr_piece_index_t checked = 0;
1151
1152    assert( tr_isTorrent( tor ) );
1153
1154    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1155        if( tor->info.pieces[i].timeChecked )
1156            ++checked;
1157
1158    return checked / (double)tor->info.pieceCount;
1159}
1160
1161const tr_stat *
1162tr_torrentStat( tr_torrent * tor )
1163{
1164    tr_stat *               s;
1165    uint64_t                now;
1166    uint64_t                seedRatioBytesLeft;
1167    uint64_t                seedRatioBytesGoal;
1168    bool                    seedRatioApplies;
1169    uint16_t                seedIdleMinutes;
1170
1171    if( !tor )
1172        return NULL;
1173
1174    assert( tr_isTorrent( tor ) );
1175    tr_torrentLock( tor );
1176
1177    tor->lastStatTime = tr_time( );
1178
1179    s = &tor->stats;
1180    s->id = tor->uniqueId;
1181    s->activity = tr_torrentGetActivity( tor );
1182    s->error = tor->error;
1183    s->queuePosition = tor->queuePosition;
1184    s->isStalled = tr_torrentIsStalled( tor );
1185    tr_strlcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1186
1187    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1188
1189    tr_peerMgrTorrentStats( tor,
1190                            &s->peersConnected,
1191                            &s->webseedsSendingToUs,
1192                            &s->peersSendingToUs,
1193                            &s->peersGettingFromUs,
1194                            s->peersFrom );
1195
1196    now = tr_time_msec( );
1197    s->rawUploadSpeed_KBps     = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_UP ) );
1198    s->pieceUploadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_UP ) );
1199    s->rawDownloadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_DOWN ) );
1200    s->pieceDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_DOWN ) );
1201
1202    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1203    s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1204
1205    s->percentDone         = tr_cpPercentDone  ( &tor->completion );
1206    s->leftUntilDone       = tr_cpLeftUntilDone( &tor->completion );
1207    s->sizeWhenDone        = tr_cpSizeWhenDone ( &tor->completion );
1208    s->recheckProgress     = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1209    s->activityDate        = tor->activityDate;
1210    s->addedDate           = tor->addedDate;
1211    s->doneDate            = tor->doneDate;
1212    s->startDate           = tor->startDate;
1213    s->secondsSeeding      = tor->secondsSeeding;
1214    s->secondsDownloading  = tor->secondsDownloading;
1215    s->idleSecs            = torrentGetIdleSecs( tor );
1216
1217    s->corruptEver      = tor->corruptCur    + tor->corruptPrev;
1218    s->downloadedEver   = tor->downloadedCur + tor->downloadedPrev;
1219    s->uploadedEver     = tor->uploadedCur   + tor->uploadedPrev;
1220    s->haveValid        = tr_cpHaveValid( &tor->completion );
1221    s->haveUnchecked    = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1222    s->desiredAvailable = tr_peerMgrGetDesiredAvailable( tor );
1223
1224    s->ratio = tr_getRatio( s->uploadedEver,
1225                            s->downloadedEver ? s->downloadedEver : s->haveValid );
1226
1227    seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1228                                                         &seedRatioBytesGoal );
1229
1230    switch( s->activity )
1231    {
1232        /* etaXLSpeed exists because if we use the piece speed directly,
1233         * brief fluctuations cause the ETA to jump all over the place.
1234         * so, etaXLSpeed is a smoothed-out version of the piece speed
1235         * to dampen the effect of fluctuations */
1236
1237        case TR_STATUS_DOWNLOAD:
1238            if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1239                tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1240                    ? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1241                    : ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
1242                tor->etaDLSpeedCalculatedAt = now;
1243            }
1244
1245            if( s->leftUntilDone > s->desiredAvailable )
1246                s->eta = TR_ETA_NOT_AVAIL;
1247            else if( tor->etaDLSpeed_KBps < 1 )
1248                s->eta = TR_ETA_UNKNOWN;
1249            else
1250                s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1251
1252            s->etaIdle = TR_ETA_NOT_AVAIL;
1253            break;
1254
1255        case TR_STATUS_SEED: {
1256            if( !seedRatioApplies )
1257                s->eta = TR_ETA_NOT_AVAIL;
1258            else {
1259                if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1260                    tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1261                        ? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1262                        : ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
1263                    tor->etaULSpeedCalculatedAt = now;
1264                }
1265                if( tor->etaULSpeed_KBps < 1 )
1266                    s->eta = TR_ETA_UNKNOWN;
1267                else
1268                    s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1269            }
1270
1271            if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1272                s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1273            else
1274                s->etaIdle = TR_ETA_NOT_AVAIL;
1275            break;
1276        }
1277
1278        default:
1279            s->eta = TR_ETA_NOT_AVAIL;
1280            s->etaIdle = TR_ETA_NOT_AVAIL;
1281            break;
1282    }
1283
1284    /* s->haveValid is here to make sure a torrent isn't marked 'finished'
1285     * when the user hits "uncheck all" prior to starting the torrent... */
1286    s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1287
1288    if( !seedRatioApplies || s->finished )
1289        s->seedRatioPercentDone = 1;
1290    else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1291        s->seedRatioPercentDone = 0;
1292    else
1293        s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1294
1295    tr_torrentUnlock( tor );
1296
1297    /* test some of the constraints */
1298    assert( s->sizeWhenDone <= tor->info.totalSize );
1299    assert( s->leftUntilDone <= s->sizeWhenDone );
1300    assert( s->desiredAvailable <= s->leftUntilDone );
1301    return s;
1302}
1303
1304/***
1305****
1306***/
1307
1308static uint64_t
1309fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1310{
1311    uint64_t total = 0;
1312    const tr_file * f = &tor->info.files[index];
1313
1314    if( f->length )
1315    {
1316        tr_block_index_t first;
1317        tr_block_index_t last;
1318        tr_torGetFileBlockRange( tor, index, &first, &last );
1319
1320        if( first == last )
1321        {
1322            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1323                total = f->length;
1324        }
1325        else
1326        {
1327            /* the first block */
1328            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1329                total += tor->blockSize - ( f->offset % tor->blockSize );
1330
1331            /* the middle blocks */
1332            if( first + 1 < last ) {
1333                uint64_t u = tr_bitfieldCountRange( &tor->completion.blockBitfield, first+1, last );
1334                u *= tor->blockSize;
1335                total += u;
1336            }
1337
1338            /* the last block */
1339            if( tr_cpBlockIsComplete( &tor->completion, last ) )
1340                total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * last );
1341        }
1342    }
1343
1344    return total;
1345}
1346
1347tr_file_stat *
1348tr_torrentFiles( const tr_torrent * tor,
1349                 tr_file_index_t *  fileCount )
1350{
1351    tr_file_index_t       i;
1352    const tr_file_index_t n = tor->info.fileCount;
1353    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1354    tr_file_stat *        walk = files;
1355    const bool            isSeed = tor->completeness == TR_SEED;
1356
1357    assert( tr_isTorrent( tor ) );
1358
1359    for( i=0; i<n; ++i, ++walk ) {
1360        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1361        walk->bytesCompleted = b;
1362        walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1363    }
1364
1365    if( fileCount )
1366        *fileCount = n;
1367
1368    return files;
1369}
1370
1371void
1372tr_torrentFilesFree( tr_file_stat *            files,
1373                     tr_file_index_t fileCount UNUSED )
1374{
1375    tr_free( files );
1376}
1377
1378/***
1379****
1380***/
1381
1382double*
1383tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1384{
1385    double * ret = NULL;
1386
1387    if( tr_isTorrent( tor ) )
1388    {
1389        tr_torrentLock( tor );
1390        ret = tr_peerMgrWebSpeeds_KBps( tor );
1391        tr_torrentUnlock( tor );
1392    }
1393
1394    return ret;
1395}
1396
1397tr_peer_stat *
1398tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1399{
1400    tr_peer_stat * ret = NULL;
1401
1402    if( tr_isTorrent( tor ) )
1403    {
1404        tr_torrentLock( tor );
1405        ret = tr_peerMgrPeerStats( tor, peerCount );
1406        tr_torrentUnlock( tor );
1407    }
1408
1409    return ret;
1410}
1411
1412void
1413tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1414{
1415    tr_free( peers );
1416}
1417
1418tr_tracker_stat *
1419tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1420{
1421    tr_tracker_stat * ret = NULL;
1422
1423    if( tr_isTorrent( torrent ) )
1424    {
1425        tr_torrentLock( torrent );
1426        ret = tr_announcerStats( torrent, setmeTrackerCount );
1427        tr_torrentUnlock( torrent );
1428    }
1429
1430    return ret;
1431}
1432
1433void
1434tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1435{
1436    tr_announcerStatsFree( trackers, trackerCount );
1437}
1438
1439void
1440tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1441{
1442    if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1443    {
1444        tr_torrentLock( tor );
1445        tr_peerMgrTorrentAvailability( tor, tab, size );
1446        tr_torrentUnlock( tor );
1447    }
1448}
1449
1450void
1451tr_torrentAmountFinished( const tr_torrent * tor,
1452                          float *            tab,
1453                          int                size )
1454{
1455    assert( tr_isTorrent( tor ) );
1456
1457    tr_torrentLock( tor );
1458    tr_cpGetAmountDone( &tor->completion, tab, size );
1459    tr_torrentUnlock( tor );
1460}
1461
1462static void
1463tr_torrentResetTransferStats( tr_torrent * tor )
1464{
1465    tr_torrentLock( tor );
1466
1467    tor->downloadedPrev += tor->downloadedCur;
1468    tor->downloadedCur   = 0;
1469    tor->uploadedPrev   += tor->uploadedCur;
1470    tor->uploadedCur     = 0;
1471    tor->corruptPrev    += tor->corruptCur;
1472    tor->corruptCur      = 0;
1473
1474    tr_torrentSetDirty( tor );
1475
1476    tr_torrentUnlock( tor );
1477}
1478
1479void
1480tr_torrentSetHasPiece( tr_torrent *     tor,
1481                       tr_piece_index_t pieceIndex,
1482                       bool             has )
1483{
1484    assert( tr_isTorrent( tor ) );
1485    assert( pieceIndex < tor->info.pieceCount );
1486
1487    if( has )
1488        tr_cpPieceAdd( &tor->completion, pieceIndex );
1489    else
1490        tr_cpPieceRem( &tor->completion, pieceIndex );
1491}
1492
1493/***
1494****
1495***/
1496
1497#ifndef NDEBUG
1498static bool queueIsSequenced( tr_session * );
1499#endif
1500
1501static void
1502freeTorrent( tr_torrent * tor )
1503{
1504    tr_torrent * t;
1505    tr_session *  session = tor->session;
1506    tr_info *    inf = &tor->info;
1507    const time_t now = tr_time( );
1508
1509    assert( !tor->isRunning );
1510
1511    tr_sessionLock( session );
1512
1513    tr_peerMgrRemoveTorrent( tor );
1514
1515    tr_announcerRemoveTorrent( session->announcer, tor );
1516
1517    tr_cpDestruct( &tor->completion );
1518
1519    tr_free( tor->downloadDir );
1520    tr_free( tor->incompleteDir );
1521
1522    if( tor == session->torrentList )
1523        session->torrentList = tor->next;
1524    else for( t = session->torrentList; t != NULL; t = t->next ) {
1525        if( t->next == tor ) {
1526            t->next = tor->next;
1527            break;
1528        }
1529    }
1530
1531    /* decrement the torrent count */
1532    assert( session->torrentCount >= 1 );
1533    session->torrentCount--;
1534
1535    /* resequence the queue positions */
1536    t = NULL;
1537    while(( t = tr_torrentNext( session, t ))) {
1538        if( t->queuePosition > tor->queuePosition ) {
1539            t->queuePosition--;
1540            t->anyDate = now;
1541        }
1542    }
1543    assert( queueIsSequenced( session ) );
1544
1545    tr_bandwidthDestruct( &tor->bandwidth );
1546
1547    tr_metainfoFree( inf );
1548    memset( tor, ~0, sizeof( tr_torrent ) );
1549    tr_free( tor );
1550
1551    tr_sessionUnlock( session );
1552}
1553
1554/**
1555***  Start/Stop Callback
1556**/
1557
1558static void torrentSetQueued( tr_torrent * tor, bool queued );
1559
1560static void
1561torrentStartImpl( void * vtor )
1562{
1563    time_t now;
1564    tr_torrent * tor = vtor;
1565
1566    assert( tr_isTorrent( tor ) );
1567
1568    tr_sessionLock( tor->session );
1569
1570    tr_torrentRecheckCompleteness( tor );
1571    torrentSetQueued( tor, false );
1572
1573    now = tr_time( );
1574    tor->isRunning = true;
1575    tor->completeness = tr_cpGetStatus( &tor->completion );
1576    tor->startDate = tor->anyDate = now;
1577    tr_torrentClearError( tor );
1578    tor->finishedSeedingByIdle = false;
1579
1580    tr_torrentResetTransferStats( tor );
1581    tr_announcerTorrentStarted( tor );
1582    tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1583    tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1584    tor->lpdAnnounceAt = now;
1585    tr_peerMgrStartTorrent( tor );
1586
1587    tr_sessionUnlock( tor->session );
1588}
1589
1590uint64_t
1591tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1592{
1593    tr_file_index_t i;
1594    uint64_t byte_count = 0;
1595    const tr_file_index_t n = tor->info.fileCount;
1596
1597    for( i=0; i<n; ++i )
1598    {
1599        struct stat sb;
1600        char * filename = tr_torrentFindFile( tor, i );
1601
1602        sb.st_size = 0;
1603        if( filename && !stat( filename, &sb ) )
1604            byte_count += sb.st_size;
1605
1606        tr_free( filename );
1607    }
1608
1609    return byte_count;
1610}
1611
1612static bool
1613torrentShouldQueue( const tr_torrent * tor )
1614{
1615    const tr_direction dir = tr_torrentGetQueueDirection( tor );
1616
1617    return tr_sessionCountQueueFreeSlots( tor->session, dir ) == 0;
1618}
1619
1620static void
1621torrentStart( tr_torrent * tor, bool bypass_queue )
1622{
1623    switch( torrentGetActivity( tor ) )
1624    {
1625        case TR_STATUS_SEED:
1626        case TR_STATUS_DOWNLOAD:
1627            return; /* already started */
1628            break;
1629
1630        case TR_STATUS_SEED_WAIT:
1631        case TR_STATUS_DOWNLOAD_WAIT:
1632            if( !bypass_queue )
1633                return; /* already queued */
1634            break;
1635
1636        case TR_STATUS_CHECK:
1637        case TR_STATUS_CHECK_WAIT:
1638            /* verifying right now... wait until that's done so
1639             * we'll know what completeness to use/announce */
1640            tor->startAfterVerify = true;
1641            return;
1642            break;
1643
1644        case TR_STATUS_STOPPED:
1645            if( !bypass_queue && torrentShouldQueue( tor ) ) {
1646                torrentSetQueued( tor, true );
1647                return;
1648            }
1649            break;
1650    }
1651
1652    /* don't allow the torrent to be started if the files disappeared */
1653    if( setLocalErrorIfFilesDisappeared( tor ) )
1654        return;
1655
1656    /* otherwise, start it now... */
1657    tr_sessionLock( tor->session );
1658
1659    /* allow finished torrents to be resumed */
1660    if( tr_torrentIsSeedRatioDone( tor ) ) {
1661        tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1662        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1663    }
1664
1665    /* corresponds to the peer_id sent as a tracker request parameter.
1666     * one tracker admin says: "When the same torrent is opened and
1667     * closed and opened again without quitting Transmission ...
1668     * change the peerid. It would help sometimes if a stopped event
1669     * was missed to ensure that we didn't think someone was cheating. */
1670    tr_peerIdInit( tor->peer_id );
1671    tor->isRunning = 1;
1672    tr_torrentSetDirty( tor );
1673    tr_runInEventThread( tor->session, torrentStartImpl, tor );
1674
1675    tr_sessionUnlock( tor->session );
1676}
1677
1678void
1679tr_torrentStart( tr_torrent * tor )
1680{
1681    if( tr_isTorrent( tor ) )
1682        torrentStart( tor, false );
1683}
1684
1685void
1686tr_torrentStartNow( tr_torrent * tor )
1687{
1688    if( tr_isTorrent( tor ) )
1689        torrentStart( tor, true );
1690}
1691
1692static void
1693torrentRecheckDoneImpl( void * vtor )
1694{
1695    tr_torrent * tor = vtor;
1696    assert( tr_isTorrent( tor ) );
1697
1698    tr_torrentRecheckCompleteness( tor );
1699
1700    if( tor->startAfterVerify ) {
1701        tor->startAfterVerify = false;
1702        torrentStart( tor, false );
1703    }
1704}
1705
1706static void
1707torrentRecheckDoneCB( tr_torrent * tor )
1708{
1709    assert( tr_isTorrent( tor ) );
1710
1711    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1712}
1713
1714static void
1715verifyTorrent( void * vtor )
1716{
1717    tr_torrent * tor = vtor;
1718
1719    tr_sessionLock( tor->session );
1720
1721    /* if the torrent's already being verified, stop it */
1722    tr_verifyRemove( tor );
1723
1724    /* if the torrent's running, stop it & set the restart-after-verify flag */
1725    if( tor->startAfterVerify || tor->isRunning ) {
1726        /* don't clobber isStopping */
1727        const bool startAfter = tor->isStopping ? false : true;
1728        tr_torrentStop( tor );
1729        tor->startAfterVerify = startAfter;
1730    }
1731
1732    if( setLocalErrorIfFilesDisappeared( tor ) )
1733        tor->startAfterVerify = false;
1734    else
1735        tr_verifyAdd( tor, torrentRecheckDoneCB );
1736
1737    tr_sessionUnlock( tor->session );
1738}
1739
1740void
1741tr_torrentVerify( tr_torrent * tor )
1742{
1743    if( tr_isTorrent( tor ) )
1744        tr_runInEventThread( tor->session, verifyTorrent, tor );
1745}
1746
1747void
1748tr_torrentSave( tr_torrent * tor )
1749{
1750    assert( tr_isTorrent( tor ) );
1751
1752    if( tor->isDirty )
1753    {
1754        tor->isDirty = false;
1755        tr_torrentSaveResume( tor );
1756    }
1757}
1758
1759static void
1760stopTorrent( void * vtor )
1761{
1762    tr_torrent * tor = vtor;
1763    tr_torinf( tor, "Pausing" );
1764
1765    assert( tr_isTorrent( tor ) );
1766
1767    tr_torrentLock( tor );
1768
1769    tr_verifyRemove( tor );
1770    torrentSetQueued( tor, false );
1771    tr_peerMgrStopTorrent( tor );
1772    tr_announcerTorrentStopped( tor );
1773    tr_cacheFlushTorrent( tor->session->cache, tor );
1774
1775    tr_fdTorrentClose( tor->session, tor->uniqueId );
1776
1777    if( !tor->isDeleting )
1778        tr_torrentSave( tor );
1779
1780    tr_torrentUnlock( tor );
1781}
1782
1783void
1784tr_torrentStop( tr_torrent * tor )
1785{
1786    assert( tr_isTorrent( tor ) );
1787
1788    if( tr_isTorrent( tor ) )
1789    {
1790        tr_sessionLock( tor->session );
1791
1792        tor->isRunning = 0;
1793        tor->isStopping = 0;
1794        tr_torrentSetDirty( tor );
1795        tr_runInEventThread( tor->session, stopTorrent, tor );
1796
1797        tr_sessionUnlock( tor->session );
1798    }
1799}
1800
1801static void
1802closeTorrent( void * vtor )
1803{
1804    tr_benc * d;
1805    tr_torrent * tor = vtor;
1806
1807    assert( tr_isTorrent( tor ) );
1808
1809    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1810    tr_bencDictAddInt( d, "id", tor->uniqueId );
1811    tr_bencDictAddInt( d, "date", tr_time( ) );
1812
1813    tr_torinf( tor, "%s", _( "Removing torrent" ) );
1814
1815    stopTorrent( tor );
1816
1817    if( tor->isDeleting )
1818    {
1819        tr_metainfoRemoveSaved( tor->session, &tor->info );
1820        tr_torrentRemoveResume( tor );
1821    }
1822
1823    tor->isRunning = 0;
1824    freeTorrent( tor );
1825}
1826
1827void
1828tr_torrentFree( tr_torrent * tor )
1829{
1830    if( tr_isTorrent( tor ) )
1831    {
1832        tr_session * session = tor->session;
1833        assert( tr_isSession( session ) );
1834        tr_sessionLock( session );
1835
1836        tr_torrentClearCompletenessCallback( tor );
1837        tr_runInEventThread( session, closeTorrent, tor );
1838
1839        tr_sessionUnlock( session );
1840    }
1841}
1842
1843struct remove_data
1844{
1845    tr_torrent   * tor;
1846    bool           deleteFlag;
1847    tr_fileFunc  * deleteFunc;
1848};
1849
1850static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1851
1852static void
1853removeTorrent( void * vdata )
1854{
1855    struct remove_data * data = vdata;
1856
1857    if( data->deleteFlag )
1858        tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1859
1860    tr_torrentClearCompletenessCallback( data->tor );
1861    closeTorrent( data->tor );
1862    tr_free( data );
1863}
1864
1865void
1866tr_torrentRemove( tr_torrent   * tor,
1867                  bool           deleteFlag,
1868                  tr_fileFunc    deleteFunc )
1869{
1870    struct remove_data * data;
1871
1872    assert( tr_isTorrent( tor ) );
1873    tor->isDeleting = 1;
1874
1875    data = tr_new0( struct remove_data, 1 );
1876    data->tor = tor;
1877    data->deleteFlag = deleteFlag;
1878    data->deleteFunc = deleteFunc;
1879    tr_runInEventThread( tor->session, removeTorrent, data );
1880}
1881
1882/**
1883***  Completeness
1884**/
1885
1886static const char *
1887getCompletionString( int type )
1888{
1889    switch( type )
1890    {
1891        /* Translators: this is a minor point that's safe to skip over, but FYI:
1892           "Complete" and "Done" are specific, different terms in Transmission:
1893           "Complete" means we've downloaded every file in the torrent.
1894           "Done" means we're done downloading the files we wanted, but NOT all
1895           that exist */
1896        case TR_PARTIAL_SEED:
1897            return _( "Done" );
1898
1899        case TR_SEED:
1900            return _( "Complete" );
1901
1902        default:
1903            return _( "Incomplete" );
1904    }
1905}
1906
1907static void
1908fireCompletenessChange( tr_torrent       * tor,
1909                        tr_completeness    status,
1910                        bool               wasRunning )
1911{
1912    assert( ( status == TR_LEECH )
1913         || ( status == TR_SEED )
1914         || ( status == TR_PARTIAL_SEED ) );
1915
1916    if( tor->completeness_func )
1917        tor->completeness_func( tor, status, wasRunning,
1918                                tor->completeness_func_user_data );
1919}
1920
1921void
1922tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1923                                   tr_torrent_completeness_func    func,
1924                                   void                          * user_data )
1925{
1926    assert( tr_isTorrent( tor ) );
1927
1928    tor->completeness_func = func;
1929    tor->completeness_func_user_data = user_data;
1930}
1931
1932void
1933tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1934{
1935    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1936}
1937
1938void
1939tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1940                                    tr_torrent_ratio_limit_hit_func  func,
1941                                    void                           * user_data )
1942{
1943    assert( tr_isTorrent( tor ) );
1944
1945    tor->ratio_limit_hit_func = func;
1946    tor->ratio_limit_hit_func_user_data = user_data;
1947}
1948
1949void
1950tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1951{
1952    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1953}
1954
1955void
1956tr_torrentSetIdleLimitHitCallback( tr_torrent                    * tor,
1957                                   tr_torrent_idle_limit_hit_func  func,
1958                                   void                          * user_data )
1959{
1960    assert( tr_isTorrent( tor ) );
1961
1962    tor->idle_limit_hit_func = func;
1963    tor->idle_limit_hit_func_user_data = user_data;
1964}
1965
1966void
1967tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1968{
1969    tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1970}
1971
1972static void
1973onSigCHLD( int i UNUSED )
1974{
1975    waitpid( -1, NULL, WNOHANG );
1976}
1977
1978static void
1979torrentCallScript( const tr_torrent * tor, const char * script )
1980{
1981    char timeStr[128];
1982    const time_t now = tr_time( );
1983
1984    tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1985    *strchr( timeStr,'\n' ) = '\0';
1986
1987    if( script && *script )
1988    {
1989        int i;
1990        char * cmd[] = { tr_strdup( script ), NULL };
1991        char * env[] = {
1992            tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1993            tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1994            tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1995            tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1996            tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1997            tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1998            NULL };
1999
2000        tr_torinf( tor, "Calling script \"%s\"", script );
2001
2002#ifdef WIN32
2003        _spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
2004#else
2005        signal( SIGCHLD, onSigCHLD );
2006
2007        if( !fork( ) )
2008        {
2009            for (i=0; env[i]; ++i)
2010                putenv(env[i]);
2011            execvp( script, cmd );
2012            _exit( 0 );
2013        }
2014#endif
2015
2016        for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
2017        for( i=0; env[i]; ++i ) tr_free( env[i] );
2018    }
2019}
2020
2021void
2022tr_torrentRecheckCompleteness( tr_torrent * tor )
2023{
2024    tr_completeness completeness;
2025
2026    assert( tr_isTorrent( tor ) );
2027
2028    tr_torrentLock( tor );
2029
2030    completeness = tr_cpGetStatus( &tor->completion );
2031
2032    if( completeness != tor->completeness )
2033    {
2034        const int recentChange = tor->downloadedCur != 0;
2035        const bool wasLeeching = !tr_torrentIsSeed( tor );
2036        const bool wasRunning = tor->isRunning;
2037
2038        if( recentChange )
2039        {
2040            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
2041                      getCompletionString( tor->completeness ),
2042                      getCompletionString( completeness ) );
2043        }
2044
2045        tor->completeness = completeness;
2046        tr_fdTorrentClose( tor->session, tor->uniqueId );
2047
2048        if( tr_torrentIsSeed( tor ) )
2049        {
2050            if( recentChange )
2051            {
2052                tr_announcerTorrentCompleted( tor );
2053                tor->doneDate = tor->anyDate = tr_time( );
2054            }
2055
2056            if( wasLeeching && wasRunning )
2057            {
2058                /* clear interested flag on all peers */
2059                tr_peerMgrClearInterest( tor );
2060
2061                /* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
2062                tr_torrentCheckSeedLimit( tor );
2063            }
2064
2065            if( tor->currentDir == tor->incompleteDir )
2066                tr_torrentSetLocation( tor, tor->downloadDir, true, NULL, NULL );
2067
2068            if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
2069                torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
2070        }
2071
2072        fireCompletenessChange( tor, completeness, wasRunning );
2073
2074        tr_torrentSetDirty( tor );
2075    }
2076
2077    tr_torrentUnlock( tor );
2078}
2079
2080/***
2081****
2082***/
2083
2084static void
2085tr_torrentFireMetadataCompleted( tr_torrent * tor )
2086{
2087    assert( tr_isTorrent( tor ) );
2088
2089    if( tor->metadata_func )
2090        tor->metadata_func( tor, tor->metadata_func_user_data );
2091}
2092
2093void
2094tr_torrentSetMetadataCallback( tr_torrent                * tor,
2095                               tr_torrent_metadata_func    func,
2096                               void                      * user_data )
2097{
2098    assert( tr_isTorrent( tor ) );
2099
2100    tor->metadata_func = func;
2101    tor->metadata_func_user_data = user_data;
2102}
2103
2104
2105/**
2106***  File priorities
2107**/
2108
2109void
2110tr_torrentInitFilePriority( tr_torrent *    tor,
2111                            tr_file_index_t fileIndex,
2112                            tr_priority_t   priority )
2113{
2114    tr_piece_index_t i;
2115    tr_file *        file;
2116
2117    assert( tr_isTorrent( tor ) );
2118    assert( fileIndex < tor->info.fileCount );
2119    assert( tr_isPriority( priority ) );
2120
2121    file = &tor->info.files[fileIndex];
2122    file->priority = priority;
2123    for( i = file->firstPiece; i <= file->lastPiece; ++i )
2124        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2125}
2126
2127void
2128tr_torrentSetFilePriorities( tr_torrent             * tor,
2129                             const tr_file_index_t  * files,
2130                             tr_file_index_t          fileCount,
2131                             tr_priority_t            priority )
2132{
2133    tr_file_index_t i;
2134    assert( tr_isTorrent( tor ) );
2135    tr_torrentLock( tor );
2136
2137    for( i = 0; i < fileCount; ++i )
2138        if( files[i] < tor->info.fileCount )
2139            tr_torrentInitFilePriority( tor, files[i], priority );
2140    tr_torrentSetDirty( tor );
2141    tr_peerMgrRebuildRequests( tor );
2142
2143    tr_torrentUnlock( tor );
2144}
2145
2146tr_priority_t*
2147tr_torrentGetFilePriorities( const tr_torrent * tor )
2148{
2149    tr_file_index_t i;
2150    tr_priority_t * p;
2151
2152    assert( tr_isTorrent( tor ) );
2153
2154    tr_torrentLock( tor );
2155    p = tr_new0( tr_priority_t, tor->info.fileCount );
2156    for( i = 0; i < tor->info.fileCount; ++i )
2157        p[i] = tor->info.files[i].priority;
2158    tr_torrentUnlock( tor );
2159
2160    return p;
2161}
2162
2163/**
2164***  File DND
2165**/
2166
2167static void
2168setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2169{
2170    const int8_t     dnd = !doDownload;
2171    tr_piece_index_t firstPiece;
2172    int8_t           firstPieceDND;
2173    tr_piece_index_t lastPiece;
2174    int8_t           lastPieceDND;
2175    tr_file_index_t  i;
2176    tr_file *        file = &tor->info.files[fileIndex];
2177
2178    file->dnd = dnd;
2179    firstPiece = file->firstPiece;
2180    lastPiece = file->lastPiece;
2181
2182    /* can't set the first piece to DND unless
2183       every file using that piece is DND */
2184    firstPieceDND = dnd;
2185    if( fileIndex > 0 )
2186    {
2187        for( i = fileIndex - 1; firstPieceDND; --i )
2188        {
2189            if( tor->info.files[i].lastPiece != firstPiece )
2190                break;
2191            firstPieceDND = tor->info.files[i].dnd;
2192            if( !i )
2193                break;
2194        }
2195    }
2196
2197    /* can't set the last piece to DND unless
2198       every file using that piece is DND */
2199    lastPieceDND = dnd;
2200    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2201    {
2202        if( tor->info.files[i].firstPiece != lastPiece )
2203            break;
2204        lastPieceDND = tor->info.files[i].dnd;
2205    }
2206
2207    if( firstPiece == lastPiece )
2208    {
2209        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2210    }
2211    else
2212    {
2213        tr_piece_index_t pp;
2214        tor->info.pieces[firstPiece].dnd = firstPieceDND;
2215        tor->info.pieces[lastPiece].dnd = lastPieceDND;
2216        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2217            tor->info.pieces[pp].dnd = dnd;
2218    }
2219}
2220
2221void
2222tr_torrentInitFileDLs( tr_torrent             * tor,
2223                       const tr_file_index_t  * files,
2224                       tr_file_index_t          fileCount,
2225                       bool                     doDownload )
2226{
2227    tr_file_index_t i;
2228
2229    assert( tr_isTorrent( tor ) );
2230
2231    tr_torrentLock( tor );
2232
2233    for( i=0; i<fileCount; ++i )
2234        if( files[i] < tor->info.fileCount )
2235            setFileDND( tor, files[i], doDownload );
2236
2237    tr_cpInvalidateDND( &tor->completion );
2238
2239    tr_torrentUnlock( tor );
2240}
2241
2242void
2243tr_torrentSetFileDLs( tr_torrent             * tor,
2244                      const tr_file_index_t  * files,
2245                      tr_file_index_t          fileCount,
2246                      bool                     doDownload )
2247{
2248    assert( tr_isTorrent( tor ) );
2249    tr_torrentLock( tor );
2250
2251    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2252    tr_torrentSetDirty( tor );
2253    tr_peerMgrRebuildRequests( tor );
2254
2255    tr_torrentUnlock( tor );
2256}
2257
2258/***
2259****
2260***/
2261
2262tr_priority_t
2263tr_torrentGetPriority( const tr_torrent * tor )
2264{
2265    assert( tr_isTorrent( tor ) );
2266
2267    return tor->bandwidth.priority;
2268}
2269
2270void
2271tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2272{
2273    assert( tr_isTorrent( tor ) );
2274    assert( tr_isPriority( priority ) );
2275
2276    if( tor->bandwidth.priority != priority )
2277    {
2278        tor->bandwidth.priority = priority;
2279
2280        tr_torrentSetDirty( tor );
2281    }
2282}
2283
2284/***
2285****
2286***/
2287
2288void
2289tr_torrentSetPeerLimit( tr_torrent * tor,
2290                        uint16_t     maxConnectedPeers )
2291{
2292    assert( tr_isTorrent( tor ) );
2293
2294    if ( tor->maxConnectedPeers != maxConnectedPeers )
2295    {
2296        tor->maxConnectedPeers = maxConnectedPeers;
2297
2298        tr_torrentSetDirty( tor );
2299    }
2300}
2301
2302uint16_t
2303tr_torrentGetPeerLimit( const tr_torrent * tor )
2304{
2305    assert( tr_isTorrent( tor ) );
2306
2307    return tor->maxConnectedPeers;
2308}
2309
2310/***
2311****
2312***/
2313
2314void
2315tr_torrentGetBlockLocation( const tr_torrent * tor,
2316                            tr_block_index_t   block,
2317                            tr_piece_index_t * piece,
2318                            uint32_t         * offset,
2319                            uint32_t         * length )
2320{
2321    uint64_t pos = block;
2322    pos *= tor->blockSize;
2323    *piece = pos / tor->info.pieceSize;
2324    *offset = pos - ( *piece * tor->info.pieceSize );
2325    *length = tr_torBlockCountBytes( tor, block );
2326}
2327
2328
2329tr_block_index_t
2330_tr_block( const tr_torrent * tor,
2331           tr_piece_index_t   index,
2332           uint32_t           offset )
2333{
2334    tr_block_index_t ret;
2335
2336    assert( tr_isTorrent( tor ) );
2337
2338    ret = index;
2339    ret *= ( tor->info.pieceSize / tor->blockSize );
2340    ret += offset / tor->blockSize;
2341    return ret;
2342}
2343
2344bool
2345tr_torrentReqIsValid( const tr_torrent * tor,
2346                      tr_piece_index_t   index,
2347                      uint32_t           offset,
2348                      uint32_t           length )
2349{
2350    int err = 0;
2351
2352    assert( tr_isTorrent( tor ) );
2353
2354    if( index >= tor->info.pieceCount )
2355        err = 1;
2356    else if( length < 1 )
2357        err = 2;
2358    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2359        err = 3;
2360    else if( length > MAX_BLOCK_SIZE )
2361        err = 4;
2362    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2363        err = 5;
2364
2365    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2366                              (unsigned long)index,
2367                              (unsigned long)offset,
2368                              (unsigned long)length,
2369                              err );
2370
2371    return !err;
2372}
2373
2374uint64_t
2375tr_pieceOffset( const tr_torrent * tor,
2376                tr_piece_index_t   index,
2377                uint32_t           offset,
2378                uint32_t           length )
2379{
2380    uint64_t ret;
2381
2382    assert( tr_isTorrent( tor ) );
2383
2384    ret = tor->info.pieceSize;
2385    ret *= index;
2386    ret += offset;
2387    ret += length;
2388    return ret;
2389}
2390
2391void
2392tr_torGetFileBlockRange( const tr_torrent        * tor,
2393                         const tr_file_index_t     file,
2394                         tr_block_index_t        * first,
2395                         tr_block_index_t        * last )
2396{
2397    const tr_file * f = &tor->info.files[file];
2398    uint64_t offset = f->offset;
2399    *first = offset / tor->blockSize;
2400    if( !f->length )
2401        *last = *first;
2402    else {
2403        offset += f->length - 1;
2404        *last = offset / tor->blockSize;
2405    }
2406}
2407
2408void
2409tr_torGetPieceBlockRange( const tr_torrent        * tor,
2410                          const tr_piece_index_t    piece,
2411                          tr_block_index_t        * first,
2412                          tr_block_index_t        * last )
2413{
2414    uint64_t offset = tor->info.pieceSize;
2415    offset *= piece;
2416    *first = offset / tor->blockSize;
2417    offset += ( tr_torPieceCountBytes( tor, piece ) - 1 );
2418    *last = offset / tor->blockSize;
2419}
2420
2421
2422/***
2423****
2424***/
2425
2426void
2427tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2428{
2429    assert( tr_isTorrent( tor ) );
2430    assert( pieceIndex < tor->info.pieceCount );
2431
2432    tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2433}
2434
2435void
2436tr_torrentSetChecked( tr_torrent * tor, time_t when )
2437{
2438    tr_piece_index_t i, n;
2439
2440    assert( tr_isTorrent( tor ) );
2441
2442    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2443        tor->info.pieces[i].timeChecked = when;
2444}
2445
2446bool
2447tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2448{
2449    const bool pass = tr_ioTestPiece( tor, pieceIndex );
2450
2451    tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2452    tr_torrentSetHasPiece( tor, pieceIndex, pass );
2453    tr_torrentSetPieceChecked( tor, pieceIndex );
2454    tor->anyDate = tr_time( );
2455    tr_torrentSetDirty( tor );
2456
2457    return pass;
2458}
2459
2460time_t
2461tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2462{
2463    time_t mtime = 0;
2464    if( !tr_fdFileGetCachedMTime( tor->session, tor->uniqueId, i, &mtime ) )
2465        tr_torrentFindFile2( tor, i, NULL, NULL, &mtime );
2466    return mtime;
2467}
2468
2469bool
2470tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2471{
2472    uint64_t unused;
2473    tr_file_index_t f;
2474    const tr_info * inf = tr_torrentInfo( tor );
2475
2476    /* if we've never checked this piece, then it needs to be checked */
2477    if( !inf->pieces[p].timeChecked )
2478        return true;
2479
2480    /* If we think we've completed one of the files in this piece,
2481     * but it's been modified since we last checked it,
2482     * then it needs to be rechecked */
2483    tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2484    for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2485        if( tr_cpFileIsComplete( &tor->completion, f ) )
2486            if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2487                return true;
2488
2489    return false;
2490}
2491
2492/***
2493****
2494***/
2495
2496static int
2497compareTrackerByTier( const void * va, const void * vb )
2498{
2499    const tr_tracker_info * a = va;
2500    const tr_tracker_info * b = vb;
2501
2502    /* sort by tier */
2503    if( a->tier != b->tier )
2504        return a->tier - b->tier;
2505
2506    /* get the effects of a stable sort by comparing the two elements' addresses */
2507    return a - b;
2508}
2509
2510bool
2511tr_torrentSetAnnounceList( tr_torrent             * tor,
2512                           const tr_tracker_info  * trackers_in,
2513                           int                      trackerCount )
2514{
2515    int i;
2516    tr_benc metainfo;
2517    bool ok = true;
2518    tr_tracker_info * trackers;
2519
2520    tr_torrentLock( tor );
2521
2522    assert( tr_isTorrent( tor ) );
2523
2524    /* ensure the trackers' tiers are in ascending order */
2525    trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2526    qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2527
2528    /* look for bad URLs */
2529    for( i=0; ok && i<trackerCount; ++i )
2530        if( !tr_urlIsValidTracker( trackers[i].announce ) )
2531            ok = false;
2532
2533    /* save to the .torrent file */
2534    if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2535    {
2536        bool hasInfo;
2537        tr_info tmpInfo;
2538
2539        /* remove the old fields */
2540        tr_bencDictRemove( &metainfo, "announce" );
2541        tr_bencDictRemove( &metainfo, "announce-list" );
2542
2543        /* add the new fields */
2544        if( trackerCount > 0 )
2545        {
2546            tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2547        }
2548        if( trackerCount > 1 )
2549        {
2550            int i;
2551            int prevTier = -1;
2552            tr_benc * tier = NULL;
2553            tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2554
2555            for( i=0; i<trackerCount; ++i ) {
2556                if( prevTier != trackers[i].tier ) {
2557                    prevTier = trackers[i].tier;
2558                    tier = tr_bencListAddList( announceList, 0 );
2559                }
2560                tr_bencListAddStr( tier, trackers[i].announce );
2561            }
2562        }
2563
2564        /* try to parse it back again, to make sure it's good */
2565        memset( &tmpInfo, 0, sizeof( tr_info ) );
2566        if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2567                              &hasInfo, &tor->infoDictLength ) )
2568        {
2569            /* it's good, so keep these new trackers and free the old ones */
2570
2571            tr_info swap;
2572            swap.trackers = tor->info.trackers;
2573            swap.trackerCount = tor->info.trackerCount;
2574            tor->info.trackers = tmpInfo.trackers;
2575            tor->info.trackerCount = tmpInfo.trackerCount;
2576            tmpInfo.trackers = swap.trackers;
2577            tmpInfo.trackerCount = swap.trackerCount;
2578
2579            tr_metainfoFree( &tmpInfo );
2580            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2581        }
2582
2583        /* cleanup */
2584        tr_bencFree( &metainfo );
2585
2586        /* if we had a tracker-related error on this torrent,
2587         * and that tracker's been removed,
2588         * then clear the error */
2589        if(    ( tor->error == TR_STAT_TRACKER_WARNING )
2590            || ( tor->error == TR_STAT_TRACKER_ERROR ) )
2591        {
2592            bool clear = true;
2593
2594            for( i=0; clear && i<trackerCount; ++i )
2595                if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2596                    clear = false;
2597
2598            if( clear )
2599                tr_torrentClearError( tor );
2600        }
2601
2602        /* tell the announcer to reload this torrent's tracker list */
2603        tr_announcerResetTorrent( tor->session->announcer, tor );
2604    }
2605
2606    tr_torrentUnlock( tor );
2607
2608    tr_free( trackers );
2609    return ok;
2610}
2611
2612/**
2613***
2614**/
2615
2616void
2617tr_torrentSetAddedDate( tr_torrent * tor,
2618                        time_t       t )
2619{
2620    assert( tr_isTorrent( tor ) );
2621
2622    tor->addedDate = t;
2623    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2624}
2625
2626void
2627tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2628{
2629    assert( tr_isTorrent( tor ) );
2630
2631    tor->activityDate = t;
2632    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2633}
2634
2635void
2636tr_torrentSetDoneDate( tr_torrent * tor,
2637                       time_t       t )
2638{
2639    assert( tr_isTorrent( tor ) );
2640
2641    tor->doneDate = t;
2642    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2643}
2644
2645/**
2646***
2647**/
2648
2649uint64_t
2650tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2651{
2652    tr_file_index_t i;
2653    uint64_t bytesLeft = 0;
2654
2655    assert( tr_isTorrent( tor ) );
2656
2657    for( i=0; i<tor->info.fileCount; ++i )
2658    {
2659        if( !tor->info.files[i].dnd )
2660        {
2661            struct stat sb;
2662            const uint64_t length = tor->info.files[i].length;
2663            char * path = tr_torrentFindFile( tor, i );
2664
2665            bytesLeft += length;
2666
2667            if( ( path != NULL ) && !stat( path, &sb )
2668                                 && S_ISREG( sb.st_mode )
2669                                 && ( (uint64_t)sb.st_size <= length ) )
2670                bytesLeft -= sb.st_size;
2671
2672            tr_free( path );
2673        }
2674    }
2675
2676    return bytesLeft;
2677}
2678
2679/****
2680*****  Removing the torrent's local data
2681****/
2682
2683static bool
2684isJunkFile( const char * base )
2685{
2686    int i;
2687    static const char * files[] = { ".DS_Store", "desktop.ini", "Thumbs.db" };
2688    static const int file_count = sizeof(files) / sizeof(files[0]);
2689
2690    for( i=0; i<file_count; ++i )
2691        if( !strcmp( base, files[i] ) )
2692            return true;
2693
2694#ifdef SYS_DARWIN
2695    /* check for resource forks. <http://support.apple.com/kb/TA20578> */
2696    if( !memcmp( base, "._", 2 ) )
2697        return true;
2698#endif
2699
2700    return false;
2701}
2702
2703static void
2704removeEmptyFoldersAndJunkFiles( const char * folder )
2705{
2706    DIR * odir;
2707    if(( odir = opendir( folder ))) {
2708        struct dirent * d;
2709        while(( d = readdir( odir ))) {
2710            if( strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) ) {
2711                struct stat sb;
2712                char * filename = tr_buildPath( folder, d->d_name, NULL );
2713                if( !stat( filename, &sb ) && S_ISDIR( sb.st_mode ) )
2714                    removeEmptyFoldersAndJunkFiles( filename );
2715                else if( isJunkFile( d->d_name ) )
2716                    remove( filename );
2717                tr_free( filename );
2718            }
2719        }
2720        remove( folder );
2721        closedir( odir );
2722    }
2723}
2724
2725static bool fileExists( const char * filename, time_t * optional_mtime );
2726
2727/**
2728 * This convoluted code does something (seemingly) simple:
2729 * remove the torrent's local files.
2730 *
2731 * Fun complications:
2732 * 1. Try to preserve the directory hierarchy in the recycle bin.
2733 * 2. If there are nontorrent files, don't delete them...
2734 * 3. ...unless the other files are "junk", such as .DS_Store
2735 */
2736static void
2737deleteLocalData( tr_torrent * tor, tr_fileFunc func )
2738{
2739    int i, n;
2740    tr_file_index_t f;
2741    char * base;
2742    DIR * odir;
2743    char * tmpdir = NULL;
2744    tr_ptrArray files = TR_PTR_ARRAY_INIT;
2745    tr_ptrArray folders = TR_PTR_ARRAY_INIT;
2746    const void * const vstrcmp = strcmp;
2747    const char * const top = tor->currentDir;
2748
2749    /* if it's a magnet link, there's nothing to move... */
2750    if( !tr_torrentHasMetadata( tor ) )
2751        return;
2752
2753    /***
2754    ****  Move the local data to a new tmpdir
2755    ***/
2756
2757    base = tr_strdup_printf( "%s__XXXXXX", tr_torrentName( tor ) );
2758    tmpdir = tr_buildPath( top, base, NULL );
2759    tr_mkdtemp( tmpdir );
2760    tr_free( base );
2761
2762    for( f=0; f<tor->info.fileCount; ++f )
2763    {
2764        char * filename = tr_buildPath( top, tor->info.files[f].name, NULL );
2765        if( !fileExists( filename, NULL ) ) {
2766                char * partial = tr_torrentBuildPartial( tor, f );
2767                tr_free( filename );
2768                filename = tr_buildPath( top, partial, NULL );
2769                tr_free( partial );
2770                if( !fileExists( filename, NULL ) ) {
2771                        tr_free( filename );
2772                        filename = NULL;
2773                }
2774        }
2775
2776        if( filename != NULL )
2777        {
2778            char * target = tr_buildPath( tmpdir, tor->info.files[f].name, NULL );
2779            char * target_dir = tr_dirname( target );
2780            tr_mkdirp( target_dir, 0777 );
2781            rename( filename, target );
2782            tr_ptrArrayAppend( &files, target );
2783            tr_free( target_dir );
2784            tr_free( filename );
2785        }
2786    }
2787
2788    /***
2789    ****  Remove tmpdir.
2790    ****
2791    ****  Try deleting the top-level files & folders to preserve
2792    ****  the directory hierarchy in the recycle bin.
2793    ****  If case that fails -- for example, rmdir() doesn't
2794    ****  delete nonempty folders -- go from the bottom up too.
2795    ***/
2796
2797    /* try deleting the local data's top-level files & folders */
2798    if(( odir = opendir( tmpdir )))
2799    {
2800        struct dirent * d;
2801        while(( d = readdir( odir )))
2802        {
2803            if( strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2804            {
2805                char * file = tr_buildPath( tmpdir, d->d_name, NULL );
2806                func( file );
2807                tr_free( file );
2808            }
2809        }
2810        closedir( odir );
2811    }
2812
2813    /* go from the bottom up */
2814    for( i=0, n=tr_ptrArraySize(&files); i<n; ++i )
2815    {
2816        char * walk = tr_strdup( tr_ptrArrayNth( &files, i ) );
2817        while( fileExists( walk, NULL ) && !tr_is_same_file( tmpdir, walk ) )
2818        {
2819            char * tmp = tr_dirname( walk );
2820            func( walk );
2821            tr_free( walk );
2822            walk = tmp;
2823        }
2824        tr_free( walk );
2825    }
2826
2827    /***
2828    ****  The local data has been removed.
2829    ****  What's left in top are empty folders, junk, and user-generated files.
2830    ****  Remove the first two categories and leave the third.
2831    ***/
2832
2833    /* build a list of 'top's child directories that belong to this torrent */
2834    for( f=0; f<tor->info.fileCount; ++f )
2835    {
2836        char * dir;
2837        char * filename;
2838
2839        /* get the directory that this file goes in... */
2840        filename = tr_buildPath( top, tor->info.files[f].name, NULL );
2841        dir = tr_dirname( filename );
2842        tr_free( filename );
2843        if( !tr_is_same_file( top, dir ) && strcmp( top, dir ) ) {
2844            for( ;; ) {
2845                char * parent = tr_dirname( dir );
2846                if( tr_is_same_file( top, parent ) || !strcmp( top, parent ) ) {
2847                    if( tr_ptrArrayFindSorted( &folders, dir, vstrcmp ) == NULL ) {
2848                        tr_ptrArrayInsertSorted( &folders, tr_strdup( dir ), vstrcmp );
2849                    }
2850                    break;
2851                }
2852                tr_free( dir );
2853                dir = parent;
2854            }
2855        }
2856    }
2857    for( i=0, n=tr_ptrArraySize(&folders); i<n; ++i )
2858        removeEmptyFoldersAndJunkFiles( tr_ptrArrayNth( &folders, i ) );
2859
2860    /* cleanup */
2861    rmdir( tmpdir );
2862    tr_free( tmpdir );
2863    tr_ptrArrayDestruct( &folders, tr_free );
2864    tr_ptrArrayDestruct( &files, tr_free );
2865}
2866
2867static void
2868tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc func )
2869{
2870    assert( tr_isTorrent( tor ) );
2871
2872    if( func == NULL )
2873        func = remove;
2874
2875    /* close all the files because we're about to delete them */
2876    tr_cacheFlushTorrent( tor->session->cache, tor );
2877    tr_fdTorrentClose( tor->session, tor->uniqueId );
2878
2879    deleteLocalData( tor, func );
2880}
2881
2882/***
2883****
2884***/
2885
2886struct LocationData
2887{
2888    bool move_from_old_location;
2889    volatile int * setme_state;
2890    volatile double * setme_progress;
2891    char * location;
2892    tr_torrent * tor;
2893};
2894
2895static void
2896setLocation( void * vdata )
2897{
2898    bool err = false;
2899    struct LocationData * data = vdata;
2900    tr_torrent * tor = data->tor;
2901    const bool do_move = data->move_from_old_location;
2902    const char * location = data->location;
2903    double bytesHandled = 0;
2904
2905    assert( tr_isTorrent( tor ) );
2906
2907    tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2908            tr_torrentName(tor), tor->currentDir, location );
2909
2910    tr_mkdirp( location, 0777 );
2911
2912    if( !tr_is_same_file( location, tor->currentDir ) )
2913    {
2914        tr_file_index_t i;
2915
2916        /* bad idea to move files while they're being verified... */
2917        tr_verifyRemove( tor );
2918
2919        /* try to move the files.
2920         * FIXME: there are still all kinds of nasty cases, like what
2921         * if the target directory runs out of space halfway through... */
2922        for( i=0; !err && i<tor->info.fileCount; ++i )
2923        {
2924            const tr_file * f = &tor->info.files[i];
2925            const char * oldbase;
2926            char * sub;
2927            if( tr_torrentFindFile2( tor, i, &oldbase, &sub, NULL ) )
2928            {
2929                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2930                char * newpath = tr_buildPath( location, sub, NULL );
2931
2932                tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2933
2934                if( do_move && !tr_is_same_file( oldpath, newpath ) )
2935                {
2936                    bool renamed = false;
2937                    errno = 0;
2938                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2939                    if( tr_moveFile( oldpath, newpath, &renamed ) )
2940                    {
2941                        err = true;
2942                        tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2943                                        oldpath, newpath, tr_strerror( errno ) );
2944                    }
2945                }
2946
2947                tr_free( newpath );
2948                tr_free( oldpath );
2949                tr_free( sub );
2950            }
2951
2952            if( data->setme_progress )
2953            {
2954                bytesHandled += f->length;
2955                *data->setme_progress = bytesHandled / tor->info.totalSize;
2956            }
2957        }
2958
2959        if( !err )
2960        {
2961            /* blow away the leftover subdirectories in the old location */
2962            if( do_move )
2963                tr_torrentDeleteLocalData( tor, remove );
2964
2965            /* set the new location and reverify */
2966            tr_torrentSetDownloadDir( tor, location );
2967        }
2968    }
2969
2970    if( !err && do_move )
2971    {
2972        tr_free( tor->incompleteDir );
2973        tor->incompleteDir = NULL;
2974        tor->currentDir = tor->downloadDir;
2975    }
2976
2977    if( data->setme_state )
2978        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2979
2980    /* cleanup */
2981    tr_free( data->location );
2982    tr_free( data );
2983}
2984
2985void
2986tr_torrentSetLocation( tr_torrent       * tor,
2987                       const char       * location,
2988                       bool               move_from_old_location,
2989                       volatile double  * setme_progress,
2990                       volatile int     * setme_state )
2991{
2992    struct LocationData * data;
2993
2994    assert( tr_isTorrent( tor ) );
2995
2996    if( setme_state )
2997        *setme_state = TR_LOC_MOVING;
2998    if( setme_progress )
2999        *setme_progress = 0;
3000
3001    /* run this in the libtransmission thread */
3002    data = tr_new( struct LocationData, 1 );
3003    data->tor = tor;
3004    data->location = tr_strdup( location );
3005    data->move_from_old_location = move_from_old_location;
3006    data->setme_state = setme_state;
3007    data->setme_progress = setme_progress;
3008    tr_runInEventThread( tor->session, setLocation, data );
3009}
3010
3011/***
3012****
3013***/
3014
3015void
3016tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
3017{
3018    char * sub;
3019    const char * base;
3020    const tr_info * inf = &tor->info;
3021    const tr_file * f = &inf->files[fileNum];
3022    tr_piece * p;
3023    const tr_piece * pend;
3024    const time_t now = tr_time( );
3025
3026    /* close the file so that we can reopen in read-only mode as needed */
3027    tr_fdFileClose( tor->session, tor, fileNum );
3028
3029    /* now that the file is complete and closed, we can start watching its
3030     * mtime timestamp for changes to know if we need to reverify pieces */
3031    for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
3032        p->timeChecked = now;
3033
3034    /* if the torrent's current filename isn't the same as the one in the
3035     * metadata -- for example, if it had the ".part" suffix appended to
3036     * it until now -- then rename it to match the one in the metadata */
3037    if( tr_torrentFindFile2( tor, fileNum, &base, &sub, NULL ) )
3038    {
3039        if( strcmp( sub, f->name ) )
3040        {
3041            char * oldpath = tr_buildPath( base, sub, NULL );
3042            char * newpath = tr_buildPath( base, f->name, NULL );
3043
3044            if( rename( oldpath, newpath ) )
3045                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
3046
3047            tr_free( newpath );
3048            tr_free( oldpath );
3049        }
3050
3051        tr_free( sub );
3052    }
3053}
3054
3055/***
3056****
3057***/
3058
3059#ifdef SYS_DARWIN
3060 #define TR_STAT_MTIME(sb) ((sb).st_mtimespec.tv_sec)
3061#else
3062 #define TR_STAT_MTIME(sb) ((sb).st_mtime)
3063#endif
3064
3065
3066static bool
3067fileExists( const char * filename, time_t * mtime )
3068{
3069    struct stat sb;
3070    const bool ok = !stat( filename, &sb );
3071
3072    if( ok && ( mtime != NULL ) )
3073        *mtime = TR_STAT_MTIME( sb );
3074
3075    return ok;
3076}
3077
3078bool
3079tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
3080                     const char ** base, char ** subpath, time_t * mtime )
3081{
3082    char * part = NULL;
3083    const tr_file * file;
3084    const char * b = NULL;
3085    const char * s = NULL;
3086
3087    assert( tr_isTorrent( tor ) );
3088    assert( fileNum < tor->info.fileCount );
3089
3090    file = &tor->info.files[fileNum];
3091
3092    if( b == NULL ) {
3093        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3094        if( fileExists( filename, mtime ) ) {
3095            b = tor->downloadDir;
3096            s = file->name;
3097        }
3098        tr_free( filename );
3099    }
3100
3101    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3102        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3103        if( fileExists( filename, mtime ) ) {
3104            b = tor->incompleteDir;
3105            s = file->name;
3106        }
3107        tr_free( filename );
3108    }
3109
3110    if( b == NULL )
3111        part = tr_torrentBuildPartial( tor, fileNum );
3112
3113    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3114        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3115        if( fileExists( filename, mtime ) ) {
3116            b = tor->incompleteDir;
3117            s = part;
3118        }
3119        tr_free( filename );
3120    }
3121
3122    if( b == NULL) {
3123        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3124        if( fileExists( filename, mtime ) ) {
3125            b = tor->downloadDir;
3126            s = part;
3127        }
3128        tr_free( filename );
3129    }
3130
3131    if( base != NULL )
3132        *base = b;
3133    if( subpath != NULL )
3134        *subpath = tr_strdup( s );
3135
3136    tr_free( part );
3137    return b != NULL;
3138}
3139
3140char*
3141tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3142{
3143    char * subpath;
3144    char * ret = NULL;
3145    const char * base;
3146
3147    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath, NULL ) )
3148    {
3149        ret = tr_buildPath( base, subpath, NULL );
3150        tr_free( subpath );
3151    }
3152
3153    return ret;
3154}
3155
3156/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3157static void
3158refreshCurrentDir( tr_torrent * tor )
3159{
3160    const char * dir = NULL;
3161
3162    if( tor->incompleteDir == NULL )
3163        dir = tor->downloadDir;
3164    else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3165        dir = tor->incompleteDir;
3166    else if( !tr_torrentFindFile2( tor, 0, &dir, NULL, NULL ) )
3167        dir = tor->incompleteDir;
3168
3169    assert( dir != NULL );
3170    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
3171    tor->currentDir = dir;
3172}
3173
3174char*
3175tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3176{
3177    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3178}
3179
3180/***
3181****
3182***/
3183
3184static int
3185compareTorrentByQueuePosition( const void * va, const void * vb )
3186{
3187    const tr_torrent * a = * (const tr_torrent **) va;
3188    const tr_torrent * b = * (const tr_torrent **) vb;
3189
3190    return a->queuePosition - b->queuePosition;
3191}
3192
3193#ifndef NDEBUG
3194static bool
3195queueIsSequenced( tr_session * session )
3196{
3197    int i ;
3198    int n ;
3199    bool is_sequenced = true;
3200    tr_torrent * tor;
3201    tr_torrent ** tmp = tr_new( tr_torrent *, session->torrentCount );
3202
3203    /* get all the torrents */
3204    n = 0;
3205    tor = NULL;
3206    while(( tor = tr_torrentNext( session, tor )))
3207        tmp[n++] = tor;
3208
3209    /* sort them by position */
3210    qsort( tmp, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3211
3212#if 0
3213    fprintf( stderr, "%s", "queue: " );
3214    for( i=0; i<n; ++i )
3215        fprintf( stderr, "%d ", tmp[i]->queuePosition );
3216    fputc( '\n', stderr );
3217#endif
3218
3219    /* test them */
3220    for( i=0; is_sequenced && i<n; ++i )
3221        if( tmp[i]->queuePosition != i )
3222            is_sequenced = false;
3223
3224    tr_free( tmp );
3225    return is_sequenced;
3226}
3227#endif
3228
3229int
3230tr_torrentGetQueuePosition( const tr_torrent * tor )
3231{
3232    return tor->queuePosition;
3233}
3234
3235void
3236tr_torrentSetQueuePosition( tr_torrent * tor, int pos )
3237{
3238    int back = -1;
3239    tr_torrent * walk;
3240    const int old_pos = tor->queuePosition;
3241    const time_t now = tr_time( );
3242
3243    if( pos < 0 )
3244        pos = 0;
3245
3246    tor->queuePosition = -1;
3247
3248    walk = NULL;
3249    while(( walk = tr_torrentNext( tor->session, walk )))
3250    {
3251        if( old_pos < pos ) {
3252            if( ( old_pos <= walk->queuePosition ) && ( walk->queuePosition <= pos ) ) {
3253                walk->queuePosition--;
3254                walk->anyDate = now;
3255            }
3256        }
3257
3258        if( old_pos > pos ) {
3259            if( ( pos <= walk->queuePosition ) && ( walk->queuePosition < old_pos ) ) {
3260                walk->queuePosition++;
3261                walk->anyDate = now;
3262            }
3263        }
3264
3265        if( back < walk->queuePosition )
3266            back = walk->queuePosition;
3267    }
3268
3269    tor->queuePosition = MIN( pos, (back+1) );
3270    tor->anyDate = now;
3271
3272    assert( queueIsSequenced( tor->session ) );
3273}
3274
3275void
3276tr_torrentsQueueMoveTop( tr_torrent ** torrents_in, int n )
3277{
3278    int i;
3279    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3280    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3281    for( i=n-1; i>=0; --i )
3282        tr_torrentSetQueuePosition( torrents[i], 0 );
3283    tr_free( torrents );
3284}
3285
3286void
3287tr_torrentsQueueMoveUp( tr_torrent ** torrents_in, int n )
3288{
3289    int i;
3290    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3291    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3292    for( i=0; i<n; ++i )
3293        tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition - 1 );
3294    tr_free( torrents );
3295}
3296
3297void
3298tr_torrentsQueueMoveDown( tr_torrent ** torrents_in, int n )
3299{
3300    int i;
3301    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3302    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3303    for( i=n-1; i>=0; --i )
3304        tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition + 1 );
3305    tr_free( torrents );
3306}
3307
3308void
3309tr_torrentsQueueMoveBottom( tr_torrent ** torrents_in, int n )
3310{
3311    int i;
3312    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3313    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3314    for( i=0; i<n; ++i )
3315        tr_torrentSetQueuePosition( torrents[i], INT_MAX );
3316    tr_free( torrents );
3317}
3318
3319static void
3320torrentSetQueued( tr_torrent * tor, bool queued )
3321{
3322    assert( tr_isTorrent( tor ) );
3323    assert( tr_isBool( queued ) );
3324
3325    if( tr_torrentIsQueued( tor ) != queued )
3326    {
3327        tor->isQueued = queued;
3328        tor->anyDate = tr_time( );
3329    }
3330}
3331
3332void
3333tr_torrentSetQueueStartCallback( tr_torrent * torrent, void (*callback)( tr_torrent *, void * ), void * user_data )
3334{
3335    torrent->queue_started_callback = callback;
3336    torrent->queue_started_user_data = user_data;
3337}
3338
3339
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