source: trunk/libtransmission/torrent.c @ 12622

Last change on this file since 12622 was 12622, checked in by jordan, 10 years ago

revert the last commit -- the Mac client uses the isIdle flag to know when hibernation is allowed

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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 12622 2011-08-04 04:31:14Z jordan $
11 */
12
13#include <signal.h> /* signal() */
14#include <sys/types.h> /* stat */
15#include <sys/stat.h> /* stat */
16#ifndef WIN32
17 #include <sys/wait.h> /* wait() */
18#else
19 #include <process.h>
20 #define waitpid(pid, status, options)  _cwait(status, pid, WAIT_CHILD)
21#endif
22#include <unistd.h> /* stat */
23#include <dirent.h>
24
25#include <assert.h>
26#include <math.h>
27#include <stdarg.h>
28#include <string.h> /* memcmp */
29#include <stdlib.h> /* qsort */
30#include <stdio.h> /* remove() */
31
32#include <event2/util.h> /* evutil_vsnprintf() */
33
34#include "transmission.h"
35#include "announcer.h"
36#include "bandwidth.h"
37#include "bencode.h"
38#include "cache.h"
39#include "completion.h"
40#include "crypto.h" /* for tr_sha1 */
41#include "resume.h"
42#include "fdlimit.h" /* tr_fdTorrentClose */
43#include "inout.h" /* tr_ioTestPiece() */
44#include "magnet.h"
45#include "metainfo.h"
46#include "peer-common.h" /* MAX_BLOCK_SIZE */
47#include "peer-mgr.h"
48#include "platform.h" /* TR_PATH_DELIMITER_STR */
49#include "ptrarray.h"
50#include "session.h"
51#include "torrent.h"
52#include "torrent-magnet.h"
53#include "trevent.h" /* tr_runInEventThread() */
54#include "utils.h"
55#include "verify.h"
56#include "version.h"
57
58/***
59****
60***/
61
62#define tr_deeplog_tor( tor, ... ) \
63    do { \
64        if( tr_deepLoggingIsActive( ) ) \
65            tr_deepLog( __FILE__, __LINE__, tr_torrentName( tor ), __VA_ARGS__ ); \
66    } while( 0 )
67
68/***
69****
70***/
71
72const char *
73tr_torrentName( const tr_torrent * tor )
74{
75    assert( tr_isTorrent( tor ) );
76
77    return tor->info.name;
78}
79
80int
81tr_torrentId( const tr_torrent * tor )
82{
83    return tor->uniqueId;
84}
85
86tr_torrent*
87tr_torrentFindFromId( tr_session * session, int id )
88{
89    tr_torrent * tor = NULL;
90
91    while(( tor = tr_torrentNext( session, tor )))
92        if( tor->uniqueId == id )
93            return tor;
94
95    return NULL;
96}
97
98tr_torrent*
99tr_torrentFindFromHashString( tr_session *  session, const char * str )
100{
101    tr_torrent * tor = NULL;
102
103    while(( tor = tr_torrentNext( session, tor )))
104        if( !evutil_ascii_strcasecmp( str, tor->info.hashString ) )
105            return tor;
106
107    return NULL;
108}
109
110tr_torrent*
111tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
112{
113    tr_torrent * tor = NULL;
114
115    while(( tor = tr_torrentNext( session, tor )))
116        if( *tor->info.hash == *torrentHash )
117            if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
118                return tor;
119
120    return NULL;
121}
122
123tr_torrent*
124tr_torrentFindFromMagnetLink( tr_session * session, const char * magnet )
125{
126    tr_magnet_info * info;
127    tr_torrent * tor = NULL;
128
129    if(( info = tr_magnetParse( magnet )))
130    {
131        tor = tr_torrentFindFromHash( session, info->hash );
132        tr_magnetFree( info );
133    }
134
135    return tor;
136}
137
138tr_torrent*
139tr_torrentFindFromObfuscatedHash( tr_session * session,
140                                  const uint8_t * obfuscatedTorrentHash )
141{
142    tr_torrent * tor = NULL;
143
144    while(( tor = tr_torrentNext( session, tor )))
145        if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
146                     SHA_DIGEST_LENGTH ) )
147            return tor;
148
149    return NULL;
150}
151
152bool
153tr_torrentIsPieceTransferAllowed( const tr_torrent  * tor,
154                                  tr_direction        direction )
155{
156    int limit;
157    bool allowed = true;
158
159    if( tr_torrentUsesSpeedLimit( tor, direction ) )
160        if( tr_torrentGetSpeedLimit_Bps( tor, direction ) <= 0 )
161            allowed = false;
162
163    if( tr_torrentUsesSessionLimits( tor ) )
164        if( tr_sessionGetActiveSpeedLimit_Bps( tor->session, direction, &limit ) )
165            if( limit <= 0 )
166                allowed = false;
167
168    return allowed;
169}
170
171/***
172****  PER-TORRENT UL / DL SPEEDS
173***/
174
175void
176tr_torrentSetSpeedLimit_Bps( tr_torrent * tor, tr_direction dir, int Bps )
177{
178    assert( tr_isTorrent( tor ) );
179    assert( tr_isDirection( dir ) );
180    assert( Bps >= 0 );
181
182    if( tr_bandwidthSetDesiredSpeed_Bps( &tor->bandwidth, dir, Bps ) )
183        tr_torrentSetDirty( tor );
184}
185void
186tr_torrentSetSpeedLimit_KBps( tr_torrent * tor, tr_direction dir, int KBps )
187{
188    tr_torrentSetSpeedLimit_Bps( tor, dir, toSpeedBytes( KBps ) );
189}
190
191int
192tr_torrentGetSpeedLimit_Bps( const tr_torrent * tor, tr_direction dir )
193{
194    assert( tr_isTorrent( tor ) );
195    assert( tr_isDirection( dir ) );
196
197    return tr_bandwidthGetDesiredSpeed_Bps( &tor->bandwidth, dir );
198}
199int
200tr_torrentGetSpeedLimit_KBps( const tr_torrent * tor, tr_direction dir )
201{
202    return toSpeedKBps( tr_torrentGetSpeedLimit_Bps( tor, dir ) );
203}
204
205void
206tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, bool do_use )
207{
208    assert( tr_isTorrent( tor ) );
209    assert( tr_isDirection( dir ) );
210
211    if( tr_bandwidthSetLimited( &tor->bandwidth, dir, do_use ) )
212        tr_torrentSetDirty( tor );
213}
214
215bool
216tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
217{
218    assert( tr_isTorrent( tor ) );
219    assert( tr_isDirection( dir ) );
220
221    return tr_bandwidthIsLimited( &tor->bandwidth, dir );
222}
223
224void
225tr_torrentUseSessionLimits( tr_torrent * tor, bool doUse )
226{
227    bool changed;
228
229    assert( tr_isTorrent( tor ) );
230
231    changed = tr_bandwidthHonorParentLimits( &tor->bandwidth, TR_UP, doUse );
232    changed |= tr_bandwidthHonorParentLimits( &tor->bandwidth, TR_DOWN, doUse );
233
234    if( changed )
235        tr_torrentSetDirty( tor );
236}
237
238bool
239tr_torrentUsesSessionLimits( const tr_torrent * tor )
240{
241    assert( tr_isTorrent( tor ) );
242
243    return tr_bandwidthAreParentLimitsHonored( &tor->bandwidth, TR_UP );
244}
245
246/***
247****
248***/
249
250void
251tr_torrentSetRatioMode( tr_torrent *  tor, tr_ratiolimit mode )
252{
253    assert( tr_isTorrent( tor ) );
254    assert( mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED  );
255
256    if( mode != tor->ratioLimitMode )
257    {
258        tor->ratioLimitMode = mode;
259
260        tr_torrentSetDirty( tor );
261    }
262}
263
264tr_ratiolimit
265tr_torrentGetRatioMode( const tr_torrent * tor )
266{
267    assert( tr_isTorrent( tor ) );
268
269    return tor->ratioLimitMode;
270}
271
272void
273tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
274{
275    assert( tr_isTorrent( tor ) );
276
277    if( (int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0) )
278    {
279        tor->desiredRatio = desiredRatio;
280
281        tr_torrentSetDirty( tor );
282    }
283}
284
285double
286tr_torrentGetRatioLimit( const tr_torrent * tor )
287{
288    assert( tr_isTorrent( tor ) );
289
290    return tor->desiredRatio;
291}
292
293bool
294tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
295{
296    bool isLimited;
297
298    switch( tr_torrentGetRatioMode( tor ) )
299    {
300        case TR_RATIOLIMIT_SINGLE:
301            isLimited = true;
302            if( ratio )
303                *ratio = tr_torrentGetRatioLimit( tor );
304            break;
305
306        case TR_RATIOLIMIT_GLOBAL:
307            isLimited = tr_sessionIsRatioLimited( tor->session );
308            if( isLimited && ratio )
309                *ratio = tr_sessionGetRatioLimit( tor->session );
310            break;
311
312        default: /* TR_RATIOLIMIT_UNLIMITED */
313            isLimited = false;
314            break;
315    }
316
317    return isLimited;
318}
319
320/* returns true if the seed ratio applies --
321 * it applies if the torrent's a seed AND it has a seed ratio set */
322static bool
323tr_torrentGetSeedRatioBytes( tr_torrent  * tor,
324                             uint64_t    * setmeLeft,
325                             uint64_t    * setmeGoal )
326{
327    double seedRatio;
328    bool seedRatioApplies = false;
329
330    if( tr_torrentGetSeedRatio( tor, &seedRatio ) )
331    {
332        const uint64_t u = tor->uploadedCur + tor->uploadedPrev;
333        const uint64_t d = tor->downloadedCur + tor->downloadedPrev;
334        const uint64_t baseline = d ? d : tr_cpSizeWhenDone( &tor->completion );
335        const uint64_t goal = baseline * seedRatio;
336        if( setmeLeft ) *setmeLeft = goal > u ? goal - u : 0;
337        if( setmeGoal ) *setmeGoal = goal;
338        seedRatioApplies = tr_torrentIsSeed( tor );
339    }
340
341    return seedRatioApplies;
342}
343
344static bool
345tr_torrentIsSeedRatioDone( tr_torrent * tor )
346{
347    uint64_t bytesLeft;
348    return tr_torrentGetSeedRatioBytes( tor, &bytesLeft, NULL ) && !bytesLeft;
349}
350
351/***
352****
353***/
354
355void
356tr_torrentSetIdleMode( tr_torrent *  tor, tr_idlelimit mode )
357{
358    assert( tr_isTorrent( tor ) );
359    assert( mode==TR_IDLELIMIT_GLOBAL || mode==TR_IDLELIMIT_SINGLE || mode==TR_IDLELIMIT_UNLIMITED  );
360
361    if( mode != tor->idleLimitMode )
362    {
363        tor->idleLimitMode = mode;
364
365        tr_torrentSetDirty( tor );
366    }
367}
368
369tr_idlelimit
370tr_torrentGetIdleMode( const tr_torrent * tor )
371{
372    assert( tr_isTorrent( tor ) );
373
374    return tor->idleLimitMode;
375}
376
377void
378tr_torrentSetIdleLimit( tr_torrent * tor, uint16_t idleMinutes )
379{
380    assert( tr_isTorrent( tor ) );
381
382    if( idleMinutes > 0 )
383    {
384        tor->idleLimitMinutes = idleMinutes;
385
386        tr_torrentSetDirty( tor );
387    }
388}
389
390uint16_t
391tr_torrentGetIdleLimit( const tr_torrent * tor )
392{
393    assert( tr_isTorrent( tor ) );
394
395    return tor->idleLimitMinutes;
396}
397
398bool
399tr_torrentGetSeedIdle( const tr_torrent * tor, uint16_t * idleMinutes )
400{
401    bool isLimited;
402
403    switch( tr_torrentGetIdleMode( tor ) )
404    {
405        case TR_IDLELIMIT_SINGLE:
406            isLimited = true;
407            if( idleMinutes )
408                *idleMinutes = tr_torrentGetIdleLimit( tor );
409            break;
410
411        case TR_IDLELIMIT_GLOBAL:
412            isLimited = tr_sessionIsIdleLimited( tor->session );
413            if( isLimited && idleMinutes )
414                *idleMinutes = tr_sessionGetIdleLimit( tor->session );
415            break;
416
417        default: /* TR_IDLELIMIT_UNLIMITED */
418            isLimited = false;
419            break;
420    }
421
422    return isLimited;
423}
424
425static bool
426tr_torrentIsSeedIdleLimitDone( tr_torrent * tor )
427{
428    uint16_t idleMinutes;
429    return tr_torrentGetSeedIdle( tor, &idleMinutes )
430        && difftime(tr_time(), MAX(tor->startDate, tor->activityDate)) >= idleMinutes * 60u;
431}
432
433/***
434****
435***/
436
437void
438tr_torrentCheckSeedLimit( tr_torrent * tor )
439{
440    assert( tr_isTorrent( tor ) );
441
442    if( !tor->isRunning || !tr_torrentIsSeed( tor ) )
443        return;
444
445    /* if we're seeding and reach our seed ratio limit, stop the torrent */
446    if( tr_torrentIsSeedRatioDone( tor ) )
447    {
448        tr_torinf( tor, "Seed ratio reached; pausing torrent" );
449
450        tor->isStopping = true;
451
452        /* maybe notify the client */
453        if( tor->ratio_limit_hit_func != NULL )
454            tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
455    }
456    /* if we're seeding and reach our inactiviy limit, stop the torrent */
457    else if( tr_torrentIsSeedIdleLimitDone( tor ) )
458    {
459        tr_torinf( tor, "Seeding idle limit reached; pausing torrent" );
460
461        tor->isStopping = true;
462        tor->finishedSeedingByIdle = true;
463
464        /* maybe notify the client */
465        if( tor->idle_limit_hit_func != NULL )
466            tor->idle_limit_hit_func( tor, tor->idle_limit_hit_func_user_data );
467    }
468}
469
470/***
471****
472***/
473
474void
475tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
476{
477    va_list ap;
478
479    assert( tr_isTorrent( tor ) );
480
481    va_start( ap, fmt );
482    tor->error = TR_STAT_LOCAL_ERROR;
483    tor->errorTracker[0] = '\0';
484    evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
485    va_end( ap );
486
487    tr_torerr( tor, "%s", tor->errorString );
488
489    if( tor->isRunning )
490        tor->isStopping = true;
491}
492
493static void
494tr_torrentClearError( tr_torrent * tor )
495{
496    tor->error = TR_STAT_OK;
497    tor->errorString[0] = '\0';
498    tor->errorTracker[0] = '\0';
499}
500
501static void
502onTrackerResponse( tr_torrent * tor, const tr_tracker_event * event, void * unused UNUSED )
503{
504    switch( event->messageType )
505    {
506        case TR_TRACKER_PEERS:
507        {
508            size_t i;
509            const int8_t seedProbability = event->seedProbability;
510            const bool allAreSeeds = seedProbability == 100;
511
512             if( allAreSeeds )
513                tr_tordbg( tor, "Got %zu seeds from tracker", event->pexCount );
514            else
515                tr_tordbg( tor, "Got %zu peers from tracker", event->pexCount );
516
517            for( i = 0; i < event->pexCount; ++i )
518                tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, &event->pex[i], seedProbability );
519
520            if( allAreSeeds && tr_torrentIsPrivate( tor ) )
521                tr_peerMgrMarkAllAsSeeds( tor );
522
523            break;
524        }
525
526        case TR_TRACKER_WARNING:
527            tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
528            tor->error = TR_STAT_TRACKER_WARNING;
529            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
530            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
531            break;
532
533        case TR_TRACKER_ERROR:
534            tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
535            tor->error = TR_STAT_TRACKER_ERROR;
536            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
537            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
538            break;
539
540        case TR_TRACKER_ERROR_CLEAR:
541            if( tor->error != TR_STAT_LOCAL_ERROR )
542                tr_torrentClearError( tor );
543            break;
544    }
545}
546
547/***
548****
549****  TORRENT INSTANTIATION
550****
551***/
552
553static tr_piece_index_t
554getBytePiece( const tr_info * info, uint64_t byteOffset )
555{
556    assert( info );
557    assert( info->pieceSize != 0 );
558
559    return byteOffset / info->pieceSize;
560}
561
562static void
563initFilePieces( tr_info *       info,
564                tr_file_index_t fileIndex )
565{
566    tr_file * file;
567    uint64_t  firstByte, lastByte;
568
569    assert( info );
570    assert( fileIndex < info->fileCount );
571
572    file = &info->files[fileIndex];
573    firstByte = file->offset;
574    lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
575    file->firstPiece = getBytePiece( info, firstByte );
576    file->lastPiece = getBytePiece( info, lastByte );
577}
578
579static int
580pieceHasFile( tr_piece_index_t piece,
581              const tr_file *  file )
582{
583    return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
584}
585
586static tr_priority_t
587calculatePiecePriority( const tr_torrent * tor,
588                        tr_piece_index_t   piece,
589                        int                fileHint )
590{
591    tr_file_index_t i;
592    tr_priority_t priority = TR_PRI_LOW;
593
594    /* find the first file that has data in this piece */
595    if( fileHint >= 0 ) {
596        i = fileHint;
597        while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
598            --i;
599    } else {
600        for( i = 0; i < tor->info.fileCount; ++i )
601            if( pieceHasFile( piece, &tor->info.files[i] ) )
602                break;
603    }
604
605    /* the piece's priority is the max of the priorities
606     * of all the files in that piece */
607    for( ; i < tor->info.fileCount; ++i )
608    {
609        const tr_file * file = &tor->info.files[i];
610
611        if( !pieceHasFile( piece, file ) )
612            break;
613
614        priority = MAX( priority, file->priority );
615
616        /* when dealing with multimedia files, getting the first and
617           last pieces can sometimes allow you to preview it a bit
618           before it's fully downloaded... */
619        if( file->priority >= TR_PRI_NORMAL )
620            if( file->firstPiece == piece || file->lastPiece == piece )
621                priority = TR_PRI_HIGH;
622    }
623
624    return priority;
625}
626
627static void
628tr_torrentInitFilePieces( tr_torrent * tor )
629{
630    int * firstFiles;
631    tr_file_index_t f;
632    tr_piece_index_t p;
633    uint64_t offset = 0;
634    tr_info * inf = &tor->info;
635
636    /* assign the file offsets */
637    for( f=0; f<inf->fileCount; ++f ) {
638        inf->files[f].offset = offset;
639        offset += inf->files[f].length;
640        initFilePieces( inf, f );
641    }
642
643    /* build the array of first-file hints to give calculatePiecePriority */
644    firstFiles = tr_new( int, inf->pieceCount );
645    for( p=f=0; p<inf->pieceCount; ++p ) {
646        while( inf->files[f].lastPiece < p )
647            ++f;
648        firstFiles[p] = f;
649    }
650
651#if 0
652    /* test to confirm the first-file hints are correct */
653    for( p=0; p<inf->pieceCount; ++p ) {
654        f = firstFiles[p];
655        assert( inf->files[f].firstPiece <= p );
656        assert( inf->files[f].lastPiece >= p );
657        if( f > 0 )
658            assert( inf->files[f-1].lastPiece < p );
659        for( f=0; f<inf->fileCount; ++f )
660            if( pieceHasFile( p, &inf->files[f] ) )
661                break;
662        assert( (int)f == firstFiles[p] );
663    }
664#endif
665
666    for( p=0; p<inf->pieceCount; ++p )
667        inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
668
669    tr_free( firstFiles );
670}
671
672static void torrentStart( tr_torrent * tor, bool bypass_queue );
673
674/**
675 * Decide on a block size. Constraints:
676 * (1) most clients decline requests over 16 KiB
677 * (2) pieceSize must be a multiple of block size
678 */
679uint32_t
680tr_getBlockSize( uint32_t pieceSize )
681{
682    uint32_t b = pieceSize;
683
684    while( b > MAX_BLOCK_SIZE )
685        b /= 2u;
686
687    if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
688        return 0;
689    return b;
690}
691
692static void refreshCurrentDir( tr_torrent * tor );
693
694static void
695torrentInitFromInfo( tr_torrent * tor )
696{
697    uint64_t t;
698    tr_info * info = &tor->info;
699
700    tor->blockSize = tr_getBlockSize( info->pieceSize );
701
702    if( info->pieceSize )
703        tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
704
705    if( !tor->lastPieceSize )
706        tor->lastPieceSize = info->pieceSize;
707
708    if( tor->blockSize )
709        tor->lastBlockSize = info->totalSize % tor->blockSize;
710
711    if( !tor->lastBlockSize )
712        tor->lastBlockSize = tor->blockSize;
713
714    tor->blockCount = tor->blockSize
715        ? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
716        : 0;
717
718    tor->blockCountInPiece = tor->blockSize
719        ? info->pieceSize / tor->blockSize
720        : 0;
721
722    tor->blockCountInLastPiece = tor->blockSize
723        ? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
724        : 0;
725
726    /* check our work */
727    if( tor->blockSize != 0 )
728        assert( ( info->pieceSize % tor->blockSize ) == 0 );
729    t = info->pieceCount - 1;
730    t *= info->pieceSize;
731    t += tor->lastPieceSize;
732    assert( t == info->totalSize );
733    t = tor->blockCount - 1;
734    t *= tor->blockSize;
735    t += tor->lastBlockSize;
736    assert( t == info->totalSize );
737    t = info->pieceCount - 1;
738    t *= tor->blockCountInPiece;
739    t += tor->blockCountInLastPiece;
740    assert( t == (uint64_t)tor->blockCount );
741
742    tr_cpConstruct( &tor->completion, tor );
743
744    tr_torrentInitFilePieces( tor );
745
746    tor->completeness = tr_cpGetStatus( &tor->completion );
747}
748
749static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
750
751void
752tr_torrentGotNewInfoDict( tr_torrent * tor )
753{
754    torrentInitFromInfo( tor );
755
756    tr_peerMgrOnTorrentGotMetainfo( tor );
757
758    tr_torrentFireMetadataCompleted( tor );
759}
760
761static bool
762hasAnyLocalData( const tr_torrent * tor )
763{
764    tr_file_index_t i;
765
766    for( i=0; i<tor->info.fileCount; ++i )
767        if( tr_torrentFindFile2( tor, i, NULL, NULL, NULL ) )
768            return true;
769
770    return false;
771}
772
773static bool
774setLocalErrorIfFilesDisappeared( tr_torrent * tor )
775{
776    const bool disappeared = ( tr_cpHaveTotal( &tor->completion ) > 0 ) && !hasAnyLocalData( tor );
777
778    if( disappeared )
779    {
780        tr_deeplog_tor( tor, "%s", "[LAZY] uh oh, the files disappeared" );
781        tr_torrentSetLocalError( tor, "%s", _( "No data found! Ensure your drives are connected or use \"Set Location\". To re-download, remove the torrent and re-add it." ) );
782    }
783
784    return disappeared;
785}
786
787static void
788torrentInit( tr_torrent * tor, const tr_ctor * ctor )
789{
790    int doStart;
791    uint64_t loaded;
792    const char * dir;
793    bool isNewTorrent;
794    struct stat st;
795    static int nextUniqueId = 1;
796    tr_session * session = tr_ctorGetSession( ctor );
797
798    assert( session != NULL );
799
800    tr_sessionLock( session );
801
802    tor->session   = session;
803    tor->uniqueId = nextUniqueId++;
804    tor->magicNumber = TORRENT_MAGIC_NUMBER;
805    tor->queuePosition = session->torrentCount;
806
807    tr_peerIdInit( tor->peer_id );
808
809    tr_sha1( tor->obfuscatedHash, "req2", 4,
810             tor->info.hash, SHA_DIGEST_LENGTH,
811             NULL );
812
813    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
814        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
815            tor->downloadDir = tr_strdup( dir );
816
817    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
818        dir = tr_sessionGetIncompleteDir( session );
819    if( tr_sessionIsIncompleteDirEnabled( session ) )
820        tor->incompleteDir = tr_strdup( dir );
821
822    tr_bandwidthConstruct( &tor->bandwidth, session, &session->bandwidth );
823
824    tor->bandwidth.priority = tr_ctorGetBandwidthPriority( ctor );
825
826    tor->error = TR_STAT_OK;
827
828    tor->finishedSeedingByIdle = false;
829
830    tr_peerMgrAddTorrent( session->peerMgr, tor );
831
832    assert( !tor->downloadedCur );
833    assert( !tor->uploadedCur );
834
835    tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
836                                                  overwritten by the resume file */
837
838    torrentInitFromInfo( tor );
839    loaded = tr_torrentLoadResume( tor, ~0, ctor );
840    tor->completeness = tr_cpGetStatus( &tor->completion );
841    setLocalErrorIfFilesDisappeared( tor );
842
843    tr_ctorInitTorrentPriorities( ctor, tor );
844    tr_ctorInitTorrentWanted( ctor, tor );
845
846    refreshCurrentDir( tor );
847
848    doStart = tor->isRunning;
849    tor->isRunning = 0;
850
851    if( !( loaded & TR_FR_SPEEDLIMIT ) )
852    {
853        tr_torrentUseSpeedLimit( tor, TR_UP, false );
854        tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
855        tr_torrentUseSpeedLimit( tor, TR_DOWN, false );
856        tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
857        tr_torrentUseSessionLimits( tor, true );
858    }
859
860    if( !( loaded & TR_FR_RATIOLIMIT ) )
861    {
862        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
863        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
864    }
865
866    if( !( loaded & TR_FR_IDLELIMIT ) )
867    {
868        tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
869        tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
870    }
871
872    /* add the torrent to tr_session.torrentList */
873    session->torrentCount++;
874    if( session->torrentList == NULL )
875        session->torrentList = tor;
876    else {
877        tr_torrent * it = session->torrentList;
878        while( it->next != NULL )
879            it = it->next;
880        it->next = tor;
881    }
882
883    /* if we don't have a local .torrent file already, assume the torrent is new */
884    isNewTorrent = stat( tor->info.torrent, &st );
885
886    /* maybe save our own copy of the metainfo */
887    if( tr_ctorGetSave( ctor ) )
888    {
889        const tr_benc * val;
890        if( !tr_ctorGetMetainfo( ctor, &val ) )
891        {
892            const char * path = tor->info.torrent;
893            const int err = tr_bencToFile( val, TR_FMT_BENC, path );
894            if( err )
895                tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
896            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
897        }
898    }
899
900    tor->tiers = tr_announcerAddTorrent( tor, onTrackerResponse, NULL );
901
902    if( isNewTorrent )
903    {
904        tor->startAfterVerify = doStart;
905        tr_torrentVerify( tor );
906    }
907    else if( doStart )
908    {
909        tr_torrentStart( tor );
910    }
911
912    tr_sessionUnlock( session );
913}
914
915static tr_parse_result
916torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
917                  bool * setmeHasInfo, int * dictLength )
918{
919    int             doFree;
920    bool            didParse;
921    bool            hasInfo = false;
922    tr_info         tmp;
923    const tr_benc * metainfo;
924    tr_session    * session = tr_ctorGetSession( ctor );
925    tr_parse_result result = TR_PARSE_OK;
926
927    if( setmeInfo == NULL )
928        setmeInfo = &tmp;
929    memset( setmeInfo, 0, sizeof( tr_info ) );
930
931    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
932        return TR_PARSE_ERR;
933
934    didParse = tr_metainfoParse( session, metainfo, setmeInfo,
935                                 &hasInfo, dictLength );
936    doFree = didParse && ( setmeInfo == &tmp );
937
938    if( !didParse )
939        result = TR_PARSE_ERR;
940
941    if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
942        result = TR_PARSE_ERR;
943
944    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
945        result = TR_PARSE_DUPLICATE;
946
947    if( doFree )
948        tr_metainfoFree( setmeInfo );
949
950    if( setmeHasInfo != NULL )
951        *setmeHasInfo = hasInfo;
952
953    return result;
954}
955
956tr_parse_result
957tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
958{
959    return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
960}
961
962tr_torrent *
963tr_torrentNew( const tr_ctor * ctor, int * setmeError )
964{
965    int len;
966    bool hasInfo;
967    tr_info tmpInfo;
968    tr_parse_result r;
969    tr_torrent * tor = NULL;
970
971    assert( ctor != NULL );
972    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
973
974    r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
975    if( r == TR_PARSE_OK )
976    {
977        tor = tr_new0( tr_torrent, 1 );
978        tor->info = tmpInfo;
979        if( hasInfo )
980            tor->infoDictLength = len;
981        torrentInit( tor, ctor );
982    }
983    else
984    {
985        if( r == TR_PARSE_DUPLICATE )
986            tr_metainfoFree( &tmpInfo );
987
988        if( setmeError )
989            *setmeError = r;
990    }
991
992    return tor;
993}
994
995/**
996***
997**/
998
999void
1000tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
1001{
1002    assert( tr_isTorrent( tor  ) );
1003
1004    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
1005    {
1006        tr_free( tor->downloadDir );
1007        tor->downloadDir = tr_strdup( path );
1008        tr_torrentSetDirty( tor );
1009    }
1010
1011    refreshCurrentDir( tor );
1012}
1013
1014const char*
1015tr_torrentGetDownloadDir( const tr_torrent * tor )
1016{
1017    assert( tr_isTorrent( tor  ) );
1018
1019    return tor->downloadDir;
1020}
1021
1022const char *
1023tr_torrentGetCurrentDir( const tr_torrent * tor )
1024{
1025    assert( tr_isTorrent( tor  ) );
1026
1027    return tor->currentDir;
1028}
1029
1030
1031void
1032tr_torrentChangeMyPort( tr_torrent * tor )
1033{
1034    assert( tr_isTorrent( tor  ) );
1035
1036    if( tor->isRunning )
1037        tr_announcerChangeMyPort( tor );
1038}
1039
1040static inline void
1041tr_torrentManualUpdateImpl( void * vtor )
1042{
1043    tr_torrent * tor = vtor;
1044
1045    assert( tr_isTorrent( tor  ) );
1046
1047    if( tor->isRunning )
1048        tr_announcerManualAnnounce( tor );
1049}
1050
1051void
1052tr_torrentManualUpdate( tr_torrent * tor )
1053{
1054    assert( tr_isTorrent( tor  ) );
1055
1056    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1057}
1058
1059bool
1060tr_torrentCanManualUpdate( const tr_torrent * tor )
1061{
1062    return ( tr_isTorrent( tor  ) )
1063        && ( tor->isRunning )
1064        && ( tr_announcerCanManualAnnounce( tor ) );
1065}
1066
1067const tr_info *
1068tr_torrentInfo( const tr_torrent * tor )
1069{
1070    return tr_isTorrent( tor ) ? &tor->info : NULL;
1071}
1072
1073const tr_stat *
1074tr_torrentStatCached( tr_torrent * tor )
1075{
1076    const time_t now = tr_time( );
1077
1078    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1079         ? &tor->stats
1080         : tr_torrentStat( tor );
1081}
1082
1083void
1084tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1085{
1086    assert( tr_isTorrent( tor ) );
1087    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
1088
1089    tor->verifyState = state;
1090    tor->anyDate = tr_time( );
1091}
1092
1093static tr_torrent_activity
1094torrentGetActivity( const tr_torrent * tor )
1095{
1096    const bool is_seed = tr_torrentIsSeed( tor );
1097    assert( tr_isTorrent( tor ) );
1098
1099    if( tor->verifyState == TR_VERIFY_NOW )
1100        return TR_STATUS_CHECK;
1101
1102    if( tor->verifyState == TR_VERIFY_WAIT )
1103        return TR_STATUS_CHECK_WAIT;
1104
1105    if( tor->isRunning )
1106        return is_seed ? TR_STATUS_SEED : TR_STATUS_DOWNLOAD;
1107
1108    if( tr_torrentIsQueued( tor ) ) {
1109        if( is_seed && tr_sessionGetQueueEnabled( tor->session, TR_UP ) )
1110            return TR_STATUS_SEED_WAIT;
1111        if( !is_seed && tr_sessionGetQueueEnabled( tor->session, TR_DOWN ) )
1112            return TR_STATUS_DOWNLOAD_WAIT;
1113    }
1114
1115    return TR_STATUS_STOPPED;
1116}
1117
1118tr_torrent_activity
1119tr_torrentGetActivity( tr_torrent * tor )
1120{
1121    /* FIXME: is this call still needed? */
1122    tr_torrentRecheckCompleteness( tor );
1123
1124    return torrentGetActivity( tor );
1125}
1126
1127static time_t
1128torrentGetIdleSecs( const tr_torrent * tor )
1129{
1130    int idle_secs;
1131    const tr_torrent_activity activity = torrentGetActivity( tor );
1132
1133    if ((activity == TR_STATUS_DOWNLOAD || activity == TR_STATUS_SEED) && tor->startDate != 0)
1134        idle_secs = difftime(tr_time(), MAX(tor->startDate, tor->activityDate));
1135    else
1136        idle_secs = -1;
1137
1138    return idle_secs;
1139}
1140
1141bool
1142tr_torrentIsStalled( const tr_torrent * tor )
1143{
1144    return torrentGetIdleSecs( tor ) > ( tr_sessionGetQueueStalledMinutes( tor->session ) * 60 );
1145}
1146
1147
1148static double
1149getVerifyProgress( const tr_torrent * tor )
1150{
1151    tr_piece_index_t i, n;
1152    tr_piece_index_t checked = 0;
1153
1154    assert( tr_isTorrent( tor ) );
1155
1156    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1157        if( tor->info.pieces[i].timeChecked )
1158            ++checked;
1159
1160    return checked / (double)tor->info.pieceCount;
1161}
1162
1163const tr_stat *
1164tr_torrentStat( tr_torrent * tor )
1165{
1166    tr_stat *               s;
1167    uint64_t                now;
1168    uint64_t                seedRatioBytesLeft;
1169    uint64_t                seedRatioBytesGoal;
1170    bool                    seedRatioApplies;
1171    uint16_t                seedIdleMinutes;
1172
1173    if( !tor )
1174        return NULL;
1175
1176    assert( tr_isTorrent( tor ) );
1177    tr_torrentLock( tor );
1178
1179    tor->lastStatTime = tr_time( );
1180
1181    s = &tor->stats;
1182    s->id = tor->uniqueId;
1183    s->activity = tr_torrentGetActivity( tor );
1184    s->error = tor->error;
1185    s->queuePosition = tor->queuePosition;
1186    s->isStalled = tr_torrentIsStalled( tor );
1187    tr_strlcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1188
1189    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1190
1191    tr_peerMgrTorrentStats( tor,
1192                            &s->peersConnected,
1193                            &s->webseedsSendingToUs,
1194                            &s->peersSendingToUs,
1195                            &s->peersGettingFromUs,
1196                            s->peersFrom );
1197
1198    now = tr_time_msec( );
1199    s->rawUploadSpeed_KBps     = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_UP ) );
1200    s->pieceUploadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_UP ) );
1201    s->rawDownloadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( &tor->bandwidth, now, TR_DOWN ) );
1202    s->pieceDownloadSpeed_KBps = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( &tor->bandwidth, now, TR_DOWN ) );
1203
1204    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1205    s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1206
1207    s->percentDone         = tr_cpPercentDone  ( &tor->completion );
1208    s->leftUntilDone       = tr_cpLeftUntilDone( &tor->completion );
1209    s->sizeWhenDone        = tr_cpSizeWhenDone ( &tor->completion );
1210    s->recheckProgress     = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1211    s->activityDate        = tor->activityDate;
1212    s->addedDate           = tor->addedDate;
1213    s->doneDate            = tor->doneDate;
1214    s->startDate           = tor->startDate;
1215    s->secondsSeeding      = tor->secondsSeeding;
1216    s->secondsDownloading  = tor->secondsDownloading;
1217    s->idleSecs            = torrentGetIdleSecs( tor );
1218
1219    s->corruptEver      = tor->corruptCur    + tor->corruptPrev;
1220    s->downloadedEver   = tor->downloadedCur + tor->downloadedPrev;
1221    s->uploadedEver     = tor->uploadedCur   + tor->uploadedPrev;
1222    s->haveValid        = tr_cpHaveValid( &tor->completion );
1223    s->haveUnchecked    = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1224    s->desiredAvailable = tr_peerMgrGetDesiredAvailable( tor );
1225
1226    s->ratio = tr_getRatio( s->uploadedEver,
1227                            s->downloadedEver ? s->downloadedEver : s->haveValid );
1228
1229    seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1230                                                         &seedRatioBytesGoal );
1231
1232    switch( s->activity )
1233    {
1234        /* etaXLSpeed exists because if we use the piece speed directly,
1235         * brief fluctuations cause the ETA to jump all over the place.
1236         * so, etaXLSpeed is a smoothed-out version of the piece speed
1237         * to dampen the effect of fluctuations */
1238
1239        case TR_STATUS_DOWNLOAD:
1240            if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1241                tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1242                    ? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1243                    : ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
1244                tor->etaDLSpeedCalculatedAt = now;
1245            }
1246
1247            if( s->leftUntilDone > s->desiredAvailable )
1248                s->eta = TR_ETA_NOT_AVAIL;
1249            else if( tor->etaDLSpeed_KBps < 1 )
1250                s->eta = TR_ETA_UNKNOWN;
1251            else
1252                s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1253
1254            s->etaIdle = TR_ETA_NOT_AVAIL;
1255            break;
1256
1257        case TR_STATUS_SEED: {
1258            if( !seedRatioApplies )
1259                s->eta = TR_ETA_NOT_AVAIL;
1260            else {
1261                if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1262                    tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1263                        ? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1264                        : ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
1265                    tor->etaULSpeedCalculatedAt = now;
1266                }
1267                if( tor->etaULSpeed_KBps < 1 )
1268                    s->eta = TR_ETA_UNKNOWN;
1269                else
1270                    s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1271            }
1272
1273            if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1274                s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1275            else
1276                s->etaIdle = TR_ETA_NOT_AVAIL;
1277            break;
1278        }
1279
1280        default:
1281            s->eta = TR_ETA_NOT_AVAIL;
1282            s->etaIdle = TR_ETA_NOT_AVAIL;
1283            break;
1284    }
1285
1286    /* s->haveValid is here to make sure a torrent isn't marked 'finished'
1287     * when the user hits "uncheck all" prior to starting the torrent... */
1288    s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1289
1290    if( !seedRatioApplies || s->finished )
1291        s->seedRatioPercentDone = 1;
1292    else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1293        s->seedRatioPercentDone = 0;
1294    else
1295        s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1296
1297    tr_torrentUnlock( tor );
1298
1299    /* test some of the constraints */
1300    assert( s->sizeWhenDone <= tor->info.totalSize );
1301    assert( s->leftUntilDone <= s->sizeWhenDone );
1302    assert( s->desiredAvailable <= s->leftUntilDone );
1303    return s;
1304}
1305
1306/***
1307****
1308***/
1309
1310static uint64_t
1311fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1312{
1313    uint64_t total = 0;
1314    const tr_file * f = &tor->info.files[index];
1315
1316    if( f->length )
1317    {
1318        tr_block_index_t first;
1319        tr_block_index_t last;
1320        tr_torGetFileBlockRange( tor, index, &first, &last );
1321
1322        if( first == last )
1323        {
1324            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1325                total = f->length;
1326        }
1327        else
1328        {
1329            /* the first block */
1330            if( tr_cpBlockIsComplete( &tor->completion, first ) )
1331                total += tor->blockSize - ( f->offset % tor->blockSize );
1332
1333            /* the middle blocks */
1334            if( first + 1 < last ) {
1335                uint64_t u = tr_bitfieldCountRange( &tor->completion.blockBitfield, first+1, last );
1336                u *= tor->blockSize;
1337                total += u;
1338            }
1339
1340            /* the last block */
1341            if( tr_cpBlockIsComplete( &tor->completion, last ) )
1342                total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * last );
1343        }
1344    }
1345
1346    return total;
1347}
1348
1349tr_file_stat *
1350tr_torrentFiles( const tr_torrent * tor,
1351                 tr_file_index_t *  fileCount )
1352{
1353    tr_file_index_t       i;
1354    const tr_file_index_t n = tor->info.fileCount;
1355    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1356    tr_file_stat *        walk = files;
1357    const bool            isSeed = tor->completeness == TR_SEED;
1358
1359    assert( tr_isTorrent( tor ) );
1360
1361    for( i=0; i<n; ++i, ++walk ) {
1362        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1363        walk->bytesCompleted = b;
1364        walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1365    }
1366
1367    if( fileCount )
1368        *fileCount = n;
1369
1370    return files;
1371}
1372
1373void
1374tr_torrentFilesFree( tr_file_stat *            files,
1375                     tr_file_index_t fileCount UNUSED )
1376{
1377    tr_free( files );
1378}
1379
1380/***
1381****
1382***/
1383
1384double*
1385tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1386{
1387    double * ret = NULL;
1388
1389    if( tr_isTorrent( tor ) )
1390    {
1391        tr_torrentLock( tor );
1392        ret = tr_peerMgrWebSpeeds_KBps( tor );
1393        tr_torrentUnlock( tor );
1394    }
1395
1396    return ret;
1397}
1398
1399tr_peer_stat *
1400tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1401{
1402    tr_peer_stat * ret = NULL;
1403
1404    if( tr_isTorrent( tor ) )
1405    {
1406        tr_torrentLock( tor );
1407        ret = tr_peerMgrPeerStats( tor, peerCount );
1408        tr_torrentUnlock( tor );
1409    }
1410
1411    return ret;
1412}
1413
1414void
1415tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1416{
1417    tr_free( peers );
1418}
1419
1420tr_tracker_stat *
1421tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1422{
1423    tr_tracker_stat * ret = NULL;
1424
1425    if( tr_isTorrent( torrent ) )
1426    {
1427        tr_torrentLock( torrent );
1428        ret = tr_announcerStats( torrent, setmeTrackerCount );
1429        tr_torrentUnlock( torrent );
1430    }
1431
1432    return ret;
1433}
1434
1435void
1436tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1437{
1438    tr_announcerStatsFree( trackers, trackerCount );
1439}
1440
1441void
1442tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1443{
1444    if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1445    {
1446        tr_torrentLock( tor );
1447        tr_peerMgrTorrentAvailability( tor, tab, size );
1448        tr_torrentUnlock( tor );
1449    }
1450}
1451
1452void
1453tr_torrentAmountFinished( const tr_torrent * tor,
1454                          float *            tab,
1455                          int                size )
1456{
1457    assert( tr_isTorrent( tor ) );
1458
1459    tr_torrentLock( tor );
1460    tr_cpGetAmountDone( &tor->completion, tab, size );
1461    tr_torrentUnlock( tor );
1462}
1463
1464static void
1465tr_torrentResetTransferStats( tr_torrent * tor )
1466{
1467    tr_torrentLock( tor );
1468
1469    tor->downloadedPrev += tor->downloadedCur;
1470    tor->downloadedCur   = 0;
1471    tor->uploadedPrev   += tor->uploadedCur;
1472    tor->uploadedCur     = 0;
1473    tor->corruptPrev    += tor->corruptCur;
1474    tor->corruptCur      = 0;
1475
1476    tr_torrentSetDirty( tor );
1477
1478    tr_torrentUnlock( tor );
1479}
1480
1481void
1482tr_torrentSetHasPiece( tr_torrent *     tor,
1483                       tr_piece_index_t pieceIndex,
1484                       bool             has )
1485{
1486    assert( tr_isTorrent( tor ) );
1487    assert( pieceIndex < tor->info.pieceCount );
1488
1489    if( has )
1490        tr_cpPieceAdd( &tor->completion, pieceIndex );
1491    else
1492        tr_cpPieceRem( &tor->completion, pieceIndex );
1493}
1494
1495/***
1496****
1497***/
1498
1499static bool queueIsSequenced( tr_session * );
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_cpDestruct( &tor->completion );
1516
1517    tr_announcerRemoveTorrent( session->announcer, tor );
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    tr_free( tor );
1549
1550    tr_sessionUnlock( session );
1551}
1552
1553/**
1554***  Start/Stop Callback
1555**/
1556
1557static void torrentSetQueued( tr_torrent * tor, bool queued );
1558
1559static void
1560torrentStartImpl( void * vtor )
1561{
1562    time_t now;
1563    tr_torrent * tor = vtor;
1564
1565    assert( tr_isTorrent( tor ) );
1566
1567    tr_sessionLock( tor->session );
1568
1569    tr_torrentRecheckCompleteness( tor );
1570    torrentSetQueued( tor, false );
1571
1572    now = tr_time( );
1573    tor->isRunning = true;
1574    tor->completeness = tr_cpGetStatus( &tor->completion );
1575    tor->startDate = tor->anyDate = now;
1576    tr_torrentClearError( tor );
1577    tor->finishedSeedingByIdle = false;
1578
1579    tr_torrentResetTransferStats( tor );
1580    tr_announcerTorrentStarted( tor );
1581    tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1582    tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1583    tor->lpdAnnounceAt = now;
1584    tr_peerMgrStartTorrent( tor );
1585
1586    tr_sessionUnlock( tor->session );
1587}
1588
1589uint64_t
1590tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1591{
1592    tr_file_index_t i;
1593    uint64_t byte_count = 0;
1594    const tr_file_index_t n = tor->info.fileCount;
1595
1596    for( i=0; i<n; ++i )
1597    {
1598        struct stat sb;
1599        char * filename = tr_torrentFindFile( tor, i );
1600
1601        sb.st_size = 0;
1602        if( filename && !stat( filename, &sb ) )
1603            byte_count += sb.st_size;
1604
1605        tr_free( filename );
1606    }
1607
1608    return byte_count;
1609}
1610
1611static bool
1612torrentShouldQueue( const tr_torrent * tor )
1613{
1614    const tr_direction dir = tr_torrentGetQueueDirection( tor );
1615
1616    return tr_sessionCountQueueFreeSlots( tor->session, dir ) == 0;
1617}
1618
1619static void
1620torrentStart( tr_torrent * tor, bool bypass_queue )
1621{
1622    switch( torrentGetActivity( tor ) )
1623    {
1624        case TR_STATUS_SEED:
1625        case TR_STATUS_DOWNLOAD:
1626            return; /* already started */
1627            break;
1628
1629        case TR_STATUS_SEED_WAIT:
1630        case TR_STATUS_DOWNLOAD_WAIT:
1631            if( !bypass_queue )
1632                return; /* already queued */
1633            break;
1634
1635        case TR_STATUS_CHECK:
1636        case TR_STATUS_CHECK_WAIT:
1637            /* verifying right now... wait until that's done so
1638             * we'll know what completeness to use/announce */
1639            tor->startAfterVerify = true;
1640            return;
1641            break;
1642
1643        case TR_STATUS_STOPPED:
1644            if( !bypass_queue && torrentShouldQueue( tor ) ) {
1645                torrentSetQueued( tor, true );
1646                return;
1647            }
1648            break;
1649    }
1650
1651    /* don't allow the torrent to be started if the files disappeared */
1652    if( setLocalErrorIfFilesDisappeared( tor ) )
1653        return;
1654
1655    /* otherwise, start it now... */
1656    tr_sessionLock( tor->session );
1657
1658    /* allow finished torrents to be resumed */
1659    if( tr_torrentIsSeedRatioDone( tor ) ) {
1660        tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1661        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1662    }
1663
1664    /* corresponds to the peer_id sent as a tracker request parameter.
1665     * one tracker admin says: "When the same torrent is opened and
1666     * closed and opened again without quitting Transmission ...
1667     * change the peerid. It would help sometimes if a stopped event
1668     * was missed to ensure that we didn't think someone was cheating. */
1669    tr_peerIdInit( tor->peer_id );
1670    tor->isRunning = 1;
1671    tr_torrentSetDirty( tor );
1672    tr_runInEventThread( tor->session, torrentStartImpl, tor );
1673
1674    tr_sessionUnlock( tor->session );
1675}
1676
1677void
1678tr_torrentStart( tr_torrent * tor )
1679{
1680    if( tr_isTorrent( tor ) )
1681        torrentStart( tor, false );
1682}
1683
1684void
1685tr_torrentStartNow( tr_torrent * tor )
1686{
1687    if( tr_isTorrent( tor ) )
1688        torrentStart( tor, true );
1689}
1690
1691static void
1692torrentRecheckDoneImpl( void * vtor )
1693{
1694    tr_torrent * tor = vtor;
1695    assert( tr_isTorrent( tor ) );
1696
1697    tr_torrentRecheckCompleteness( tor );
1698
1699    if( tor->startAfterVerify ) {
1700        tor->startAfterVerify = false;
1701        torrentStart( tor, false );
1702    }
1703}
1704
1705static void
1706torrentRecheckDoneCB( tr_torrent * tor )
1707{
1708    assert( tr_isTorrent( tor ) );
1709
1710    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1711}
1712
1713static void
1714verifyTorrent( void * vtor )
1715{
1716    tr_torrent * tor = vtor;
1717
1718    tr_sessionLock( tor->session );
1719
1720    /* if the torrent's already being verified, stop it */
1721    tr_verifyRemove( tor );
1722
1723    /* if the torrent's running, stop it & set the restart-after-verify flag */
1724    if( tor->startAfterVerify || tor->isRunning ) {
1725        /* don't clobber isStopping */
1726        const bool startAfter = tor->isStopping ? false : true;
1727        tr_torrentStop( tor );
1728        tor->startAfterVerify = startAfter;
1729    }
1730
1731    if( setLocalErrorIfFilesDisappeared( tor ) )
1732        tor->startAfterVerify = false;
1733    else
1734        tr_verifyAdd( tor, torrentRecheckDoneCB );
1735
1736    tr_sessionUnlock( tor->session );
1737}
1738
1739void
1740tr_torrentVerify( tr_torrent * tor )
1741{
1742    if( tr_isTorrent( tor ) )
1743        tr_runInEventThread( tor->session, verifyTorrent, tor );
1744}
1745
1746void
1747tr_torrentSave( tr_torrent * tor )
1748{
1749    assert( tr_isTorrent( tor ) );
1750
1751    if( tor->isDirty )
1752    {
1753        tor->isDirty = false;
1754        tr_torrentSaveResume( tor );
1755    }
1756}
1757
1758static void
1759stopTorrent( void * vtor )
1760{
1761    tr_torrent * tor = vtor;
1762    tr_torinf( tor, "Pausing" );
1763
1764    assert( tr_isTorrent( tor ) );
1765
1766    tr_torrentLock( tor );
1767
1768    tr_verifyRemove( tor );
1769    torrentSetQueued( tor, false );
1770    tr_peerMgrStopTorrent( tor );
1771    tr_announcerTorrentStopped( tor );
1772    tr_cacheFlushTorrent( tor->session->cache, tor );
1773
1774    tr_fdTorrentClose( tor->session, tor->uniqueId );
1775
1776    if( !tor->isDeleting )
1777        tr_torrentSave( tor );
1778
1779    tr_torrentUnlock( tor );
1780}
1781
1782void
1783tr_torrentStop( tr_torrent * tor )
1784{
1785    assert( tr_isTorrent( tor ) );
1786
1787    if( tr_isTorrent( tor ) )
1788    {
1789        tr_sessionLock( tor->session );
1790
1791        tor->isRunning = 0;
1792        tor->isStopping = 0;
1793        tr_torrentSetDirty( tor );
1794        tr_runInEventThread( tor->session, stopTorrent, tor );
1795
1796        tr_sessionUnlock( tor->session );
1797    }
1798}
1799
1800static void
1801closeTorrent( void * vtor )
1802{
1803    tr_benc * d;
1804    tr_torrent * tor = vtor;
1805
1806    assert( tr_isTorrent( tor ) );
1807
1808    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1809    tr_bencDictAddInt( d, "id", tor->uniqueId );
1810    tr_bencDictAddInt( d, "date", tr_time( ) );
1811
1812    tr_torinf( tor, "%s", _( "Removing torrent" ) );
1813
1814    stopTorrent( tor );
1815
1816    if( tor->isDeleting )
1817    {
1818        tr_metainfoRemoveSaved( tor->session, &tor->info );
1819        tr_torrentRemoveResume( tor );
1820    }
1821
1822    tor->isRunning = 0;
1823    freeTorrent( tor );
1824}
1825
1826void
1827tr_torrentFree( tr_torrent * tor )
1828{
1829    if( tr_isTorrent( tor ) )
1830    {
1831        tr_session * session = tor->session;
1832        assert( tr_isSession( session ) );
1833        tr_sessionLock( session );
1834
1835        tr_torrentClearCompletenessCallback( tor );
1836        tr_runInEventThread( session, closeTorrent, tor );
1837
1838        tr_sessionUnlock( session );
1839    }
1840}
1841
1842struct remove_data
1843{
1844    tr_torrent   * tor;
1845    bool           deleteFlag;
1846    tr_fileFunc  * deleteFunc;
1847};
1848
1849static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1850
1851static void
1852removeTorrent( void * vdata )
1853{
1854    struct remove_data * data = vdata;
1855
1856    if( data->deleteFlag )
1857        tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1858
1859    tr_torrentClearCompletenessCallback( data->tor );
1860    closeTorrent( data->tor );
1861    tr_free( data );
1862}
1863
1864void
1865tr_torrentRemove( tr_torrent   * tor,
1866                  bool           deleteFlag,
1867                  tr_fileFunc    deleteFunc )
1868{
1869    struct remove_data * data;
1870
1871    assert( tr_isTorrent( tor ) );
1872    tor->isDeleting = 1;
1873
1874    data = tr_new0( struct remove_data, 1 );
1875    data->tor = tor;
1876    data->deleteFlag = deleteFlag;
1877    data->deleteFunc = deleteFunc;
1878    tr_runInEventThread( tor->session, removeTorrent, data );
1879}
1880
1881/**
1882***  Completeness
1883**/
1884
1885static const char *
1886getCompletionString( int type )
1887{
1888    switch( type )
1889    {
1890        /* Translators: this is a minor point that's safe to skip over, but FYI:
1891           "Complete" and "Done" are specific, different terms in Transmission:
1892           "Complete" means we've downloaded every file in the torrent.
1893           "Done" means we're done downloading the files we wanted, but NOT all
1894           that exist */
1895        case TR_PARTIAL_SEED:
1896            return _( "Done" );
1897
1898        case TR_SEED:
1899            return _( "Complete" );
1900
1901        default:
1902            return _( "Incomplete" );
1903    }
1904}
1905
1906static void
1907fireCompletenessChange( tr_torrent       * tor,
1908                        tr_completeness    status,
1909                        bool               wasRunning )
1910{
1911    assert( ( status == TR_LEECH )
1912         || ( status == TR_SEED )
1913         || ( status == TR_PARTIAL_SEED ) );
1914
1915    if( tor->completeness_func )
1916        tor->completeness_func( tor, status, wasRunning,
1917                                tor->completeness_func_user_data );
1918}
1919
1920void
1921tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1922                                   tr_torrent_completeness_func    func,
1923                                   void                          * user_data )
1924{
1925    assert( tr_isTorrent( tor ) );
1926
1927    tor->completeness_func = func;
1928    tor->completeness_func_user_data = user_data;
1929}
1930
1931void
1932tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1933{
1934    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1935}
1936
1937void
1938tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1939                                    tr_torrent_ratio_limit_hit_func  func,
1940                                    void                           * user_data )
1941{
1942    assert( tr_isTorrent( tor ) );
1943
1944    tor->ratio_limit_hit_func = func;
1945    tor->ratio_limit_hit_func_user_data = user_data;
1946}
1947
1948void
1949tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1950{
1951    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1952}
1953
1954void
1955tr_torrentSetIdleLimitHitCallback( tr_torrent                    * tor,
1956                                   tr_torrent_idle_limit_hit_func  func,
1957                                   void                          * user_data )
1958{
1959    assert( tr_isTorrent( tor ) );
1960
1961    tor->idle_limit_hit_func = func;
1962    tor->idle_limit_hit_func_user_data = user_data;
1963}
1964
1965void
1966tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1967{
1968    tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1969}
1970
1971static void
1972onSigCHLD( int i UNUSED )
1973{
1974    waitpid( -1, NULL, WNOHANG );
1975}
1976
1977static void
1978torrentCallScript( const tr_torrent * tor, const char * script )
1979{
1980    char timeStr[128];
1981    const time_t now = tr_time( );
1982
1983    tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1984    *strchr( timeStr,'\n' ) = '\0';
1985
1986    if( script && *script )
1987    {
1988        int i;
1989        char * cmd[] = { tr_strdup( script ), NULL };
1990        char * env[] = {
1991            tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1992            tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1993            tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1994            tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1995            tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1996            tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1997            NULL };
1998
1999        tr_torinf( tor, "Calling script \"%s\"", script );
2000
2001#ifdef WIN32
2002        _spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
2003#else
2004        signal( SIGCHLD, onSigCHLD );
2005
2006        if( !fork( ) )
2007        {
2008            for (i=0; env[i]; ++i)
2009                putenv(env[i]);
2010            execvp( script, cmd );
2011            _exit( 0 );
2012        }
2013#endif
2014
2015        for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
2016        for( i=0; env[i]; ++i ) tr_free( env[i] );
2017    }
2018}
2019
2020void
2021tr_torrentRecheckCompleteness( tr_torrent * tor )
2022{
2023    tr_completeness completeness;
2024
2025    assert( tr_isTorrent( tor ) );
2026
2027    tr_torrentLock( tor );
2028
2029    completeness = tr_cpGetStatus( &tor->completion );
2030
2031    if( completeness != tor->completeness )
2032    {
2033        const int recentChange = tor->downloadedCur != 0;
2034        const bool wasLeeching = !tr_torrentIsSeed( tor );
2035        const bool wasRunning = tor->isRunning;
2036
2037        if( recentChange )
2038        {
2039            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
2040                      getCompletionString( tor->completeness ),
2041                      getCompletionString( completeness ) );
2042        }
2043
2044        tor->completeness = completeness;
2045        tr_fdTorrentClose( tor->session, tor->uniqueId );
2046
2047        if( tr_torrentIsSeed( tor ) )
2048        {
2049            if( recentChange )
2050            {
2051                tr_announcerTorrentCompleted( tor );
2052                tor->doneDate = tor->anyDate = tr_time( );
2053            }
2054
2055            if( wasLeeching && wasRunning )
2056            {
2057                /* clear interested flag on all peers */
2058                tr_peerMgrClearInterest( tor );
2059
2060                /* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
2061                tr_torrentCheckSeedLimit( tor );
2062            }
2063
2064            if( tor->currentDir == tor->incompleteDir )
2065                tr_torrentSetLocation( tor, tor->downloadDir, true, NULL, NULL );
2066
2067            if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
2068                torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
2069        }
2070
2071        fireCompletenessChange( tor, completeness, wasRunning );
2072
2073        tr_torrentSetDirty( tor );
2074    }
2075
2076    tr_torrentUnlock( tor );
2077}
2078
2079/***
2080****
2081***/
2082
2083static void
2084tr_torrentFireMetadataCompleted( tr_torrent * tor )
2085{
2086    assert( tr_isTorrent( tor ) );
2087
2088    if( tor->metadata_func )
2089        tor->metadata_func( tor, tor->metadata_func_user_data );
2090}
2091
2092void
2093tr_torrentSetMetadataCallback( tr_torrent                * tor,
2094                               tr_torrent_metadata_func    func,
2095                               void                      * user_data )
2096{
2097    assert( tr_isTorrent( tor ) );
2098
2099    tor->metadata_func = func;
2100    tor->metadata_func_user_data = user_data;
2101}
2102
2103
2104/**
2105***  File priorities
2106**/
2107
2108void
2109tr_torrentInitFilePriority( tr_torrent *    tor,
2110                            tr_file_index_t fileIndex,
2111                            tr_priority_t   priority )
2112{
2113    tr_piece_index_t i;
2114    tr_file *        file;
2115
2116    assert( tr_isTorrent( tor ) );
2117    assert( fileIndex < tor->info.fileCount );
2118    assert( tr_isPriority( priority ) );
2119
2120    file = &tor->info.files[fileIndex];
2121    file->priority = priority;
2122    for( i = file->firstPiece; i <= file->lastPiece; ++i )
2123        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2124}
2125
2126void
2127tr_torrentSetFilePriorities( tr_torrent             * tor,
2128                             const tr_file_index_t  * files,
2129                             tr_file_index_t          fileCount,
2130                             tr_priority_t            priority )
2131{
2132    tr_file_index_t i;
2133    assert( tr_isTorrent( tor ) );
2134    tr_torrentLock( tor );
2135
2136    for( i = 0; i < fileCount; ++i )
2137        if( files[i] < tor->info.fileCount )
2138            tr_torrentInitFilePriority( tor, files[i], priority );
2139    tr_torrentSetDirty( tor );
2140    tr_peerMgrRebuildRequests( tor );
2141
2142    tr_torrentUnlock( tor );
2143}
2144
2145tr_priority_t*
2146tr_torrentGetFilePriorities( const tr_torrent * tor )
2147{
2148    tr_file_index_t i;
2149    tr_priority_t * p;
2150
2151    assert( tr_isTorrent( tor ) );
2152
2153    tr_torrentLock( tor );
2154    p = tr_new0( tr_priority_t, tor->info.fileCount );
2155    for( i = 0; i < tor->info.fileCount; ++i )
2156        p[i] = tor->info.files[i].priority;
2157    tr_torrentUnlock( tor );
2158
2159    return p;
2160}
2161
2162/**
2163***  File DND
2164**/
2165
2166static void
2167setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2168{
2169    const int8_t     dnd = !doDownload;
2170    tr_piece_index_t firstPiece;
2171    int8_t           firstPieceDND;
2172    tr_piece_index_t lastPiece;
2173    int8_t           lastPieceDND;
2174    tr_file_index_t  i;
2175    tr_file *        file = &tor->info.files[fileIndex];
2176
2177    file->dnd = dnd;
2178    firstPiece = file->firstPiece;
2179    lastPiece = file->lastPiece;
2180
2181    /* can't set the first piece to DND unless
2182       every file using that piece is DND */
2183    firstPieceDND = dnd;
2184    if( fileIndex > 0 )
2185    {
2186        for( i = fileIndex - 1; firstPieceDND; --i )
2187        {
2188            if( tor->info.files[i].lastPiece != firstPiece )
2189                break;
2190            firstPieceDND = tor->info.files[i].dnd;
2191            if( !i )
2192                break;
2193        }
2194    }
2195
2196    /* can't set the last piece to DND unless
2197       every file using that piece is DND */
2198    lastPieceDND = dnd;
2199    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2200    {
2201        if( tor->info.files[i].firstPiece != lastPiece )
2202            break;
2203        lastPieceDND = tor->info.files[i].dnd;
2204    }
2205
2206    if( firstPiece == lastPiece )
2207    {
2208        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2209    }
2210    else
2211    {
2212        tr_piece_index_t pp;
2213        tor->info.pieces[firstPiece].dnd = firstPieceDND;
2214        tor->info.pieces[lastPiece].dnd = lastPieceDND;
2215        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2216            tor->info.pieces[pp].dnd = dnd;
2217    }
2218}
2219
2220void
2221tr_torrentInitFileDLs( tr_torrent             * tor,
2222                       const tr_file_index_t  * files,
2223                       tr_file_index_t          fileCount,
2224                       bool                     doDownload )
2225{
2226    tr_file_index_t i;
2227
2228    assert( tr_isTorrent( tor ) );
2229
2230    tr_torrentLock( tor );
2231
2232    for( i=0; i<fileCount; ++i )
2233        if( files[i] < tor->info.fileCount )
2234            setFileDND( tor, files[i], doDownload );
2235
2236    tr_cpInvalidateDND( &tor->completion );
2237
2238    tr_torrentUnlock( tor );
2239}
2240
2241void
2242tr_torrentSetFileDLs( tr_torrent             * tor,
2243                      const tr_file_index_t  * files,
2244                      tr_file_index_t          fileCount,
2245                      bool                     doDownload )
2246{
2247    assert( tr_isTorrent( tor ) );
2248    tr_torrentLock( tor );
2249
2250    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2251    tr_torrentSetDirty( tor );
2252    tr_peerMgrRebuildRequests( tor );
2253
2254    tr_torrentUnlock( tor );
2255}
2256
2257/***
2258****
2259***/
2260
2261tr_priority_t
2262tr_torrentGetPriority( const tr_torrent * tor )
2263{
2264    assert( tr_isTorrent( tor ) );
2265
2266    return tor->bandwidth.priority;
2267}
2268
2269void
2270tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2271{
2272    assert( tr_isTorrent( tor ) );
2273    assert( tr_isPriority( priority ) );
2274
2275    if( tor->bandwidth.priority != priority )
2276    {
2277        tor->bandwidth.priority = priority;
2278
2279        tr_torrentSetDirty( tor );
2280    }
2281}
2282
2283/***
2284****
2285***/
2286
2287void
2288tr_torrentSetPeerLimit( tr_torrent * tor,
2289                        uint16_t     maxConnectedPeers )
2290{
2291    assert( tr_isTorrent( tor ) );
2292
2293    if ( tor->maxConnectedPeers != maxConnectedPeers )
2294    {
2295        tor->maxConnectedPeers = maxConnectedPeers;
2296
2297        tr_torrentSetDirty( tor );
2298    }
2299}
2300
2301uint16_t
2302tr_torrentGetPeerLimit( const tr_torrent * tor )
2303{
2304    assert( tr_isTorrent( tor ) );
2305
2306    return tor->maxConnectedPeers;
2307}
2308
2309/***
2310****
2311***/
2312
2313void
2314tr_torrentGetBlockLocation( const tr_torrent * tor,
2315                            tr_block_index_t   block,
2316                            tr_piece_index_t * piece,
2317                            uint32_t         * offset,
2318                            uint32_t         * length )
2319{
2320    uint64_t pos = block;
2321    pos *= tor->blockSize;
2322    *piece = pos / tor->info.pieceSize;
2323    *offset = pos - ( *piece * tor->info.pieceSize );
2324    *length = tr_torBlockCountBytes( tor, block );
2325}
2326
2327
2328tr_block_index_t
2329_tr_block( const tr_torrent * tor,
2330           tr_piece_index_t   index,
2331           uint32_t           offset )
2332{
2333    tr_block_index_t ret;
2334
2335    assert( tr_isTorrent( tor ) );
2336
2337    ret = index;
2338    ret *= ( tor->info.pieceSize / tor->blockSize );
2339    ret += offset / tor->blockSize;
2340    return ret;
2341}
2342
2343bool
2344tr_torrentReqIsValid( const tr_torrent * tor,
2345                      tr_piece_index_t   index,
2346                      uint32_t           offset,
2347                      uint32_t           length )
2348{
2349    int err = 0;
2350
2351    assert( tr_isTorrent( tor ) );
2352
2353    if( index >= tor->info.pieceCount )
2354        err = 1;
2355    else if( length < 1 )
2356        err = 2;
2357    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2358        err = 3;
2359    else if( length > MAX_BLOCK_SIZE )
2360        err = 4;
2361    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2362        err = 5;
2363
2364    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2365                              (unsigned long)index,
2366                              (unsigned long)offset,
2367                              (unsigned long)length,
2368                              err );
2369
2370    return !err;
2371}
2372
2373uint64_t
2374tr_pieceOffset( const tr_torrent * tor,
2375                tr_piece_index_t   index,
2376                uint32_t           offset,
2377                uint32_t           length )
2378{
2379    uint64_t ret;
2380
2381    assert( tr_isTorrent( tor ) );
2382
2383    ret = tor->info.pieceSize;
2384    ret *= index;
2385    ret += offset;
2386    ret += length;
2387    return ret;
2388}
2389
2390void
2391tr_torGetFileBlockRange( const tr_torrent        * tor,
2392                         const tr_file_index_t     file,
2393                         tr_block_index_t        * first,
2394                         tr_block_index_t        * last )
2395{
2396    const tr_file * f = &tor->info.files[file];
2397    uint64_t offset = f->offset;
2398    *first = offset / tor->blockSize;
2399    if( !f->length )
2400        *last = *first;
2401    else {
2402        offset += f->length - 1;
2403        *last = offset / tor->blockSize;
2404    }
2405}
2406
2407void
2408tr_torGetPieceBlockRange( const tr_torrent        * tor,
2409                          const tr_piece_index_t    piece,
2410                          tr_block_index_t        * first,
2411                          tr_block_index_t        * last )
2412{
2413    uint64_t offset = tor->info.pieceSize;
2414    offset *= piece;
2415    *first = offset / tor->blockSize;
2416    offset += ( tr_torPieceCountBytes( tor, piece ) - 1 );
2417    *last = offset / tor->blockSize;
2418}
2419
2420
2421/***
2422****
2423***/
2424
2425void
2426tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2427{
2428    assert( tr_isTorrent( tor ) );
2429    assert( pieceIndex < tor->info.pieceCount );
2430
2431    tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2432}
2433
2434void
2435tr_torrentSetChecked( tr_torrent * tor, time_t when )
2436{
2437    tr_piece_index_t i, n;
2438
2439    assert( tr_isTorrent( tor ) );
2440
2441    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2442        tor->info.pieces[i].timeChecked = when;
2443}
2444
2445bool
2446tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2447{
2448    const bool pass = tr_ioTestPiece( tor, pieceIndex );
2449
2450    tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2451    tr_torrentSetHasPiece( tor, pieceIndex, pass );
2452    tr_torrentSetPieceChecked( tor, pieceIndex );
2453    tor->anyDate = tr_time( );
2454    tr_torrentSetDirty( tor );
2455
2456    return pass;
2457}
2458
2459time_t
2460tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2461{
2462    time_t mtime = 0;
2463    if( !tr_fdFileGetCachedMTime( tor->session, tor->uniqueId, i, &mtime ) )
2464        tr_torrentFindFile2( tor, i, NULL, NULL, &mtime );
2465    return mtime;
2466}
2467
2468bool
2469tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2470{
2471    uint64_t unused;
2472    tr_file_index_t f;
2473    const tr_info * inf = tr_torrentInfo( tor );
2474
2475    /* if we've never checked this piece, then it needs to be checked */
2476    if( !inf->pieces[p].timeChecked )
2477        return true;
2478
2479    /* If we think we've completed one of the files in this piece,
2480     * but it's been modified since we last checked it,
2481     * then it needs to be rechecked */
2482    tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2483    for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2484        if( tr_cpFileIsComplete( &tor->completion, f ) )
2485            if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2486                return true;
2487
2488    return false;
2489}
2490
2491/***
2492****
2493***/
2494
2495static int
2496compareTrackerByTier( const void * va, const void * vb )
2497{
2498    const tr_tracker_info * a = va;
2499    const tr_tracker_info * b = vb;
2500
2501    /* sort by tier */
2502    if( a->tier != b->tier )
2503        return a->tier - b->tier;
2504
2505    /* get the effects of a stable sort by comparing the two elements' addresses */
2506    return a - b;
2507}
2508
2509bool
2510tr_torrentSetAnnounceList( tr_torrent             * tor,
2511                           const tr_tracker_info  * trackers_in,
2512                           int                      trackerCount )
2513{
2514    int i;
2515    tr_benc metainfo;
2516    bool ok = true;
2517    tr_tracker_info * trackers;
2518
2519    tr_torrentLock( tor );
2520
2521    assert( tr_isTorrent( tor ) );
2522
2523    /* ensure the trackers' tiers are in ascending order */
2524    trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2525    qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2526
2527    /* look for bad URLs */
2528    for( i=0; ok && i<trackerCount; ++i )
2529        if( !tr_urlIsValidTracker( trackers[i].announce ) )
2530            ok = false;
2531
2532    /* save to the .torrent file */
2533    if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2534    {
2535        bool hasInfo;
2536        tr_info tmpInfo;
2537
2538        /* remove the old fields */
2539        tr_bencDictRemove( &metainfo, "announce" );
2540        tr_bencDictRemove( &metainfo, "announce-list" );
2541
2542        /* add the new fields */
2543        if( trackerCount > 0 )
2544        {
2545            tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2546        }
2547        if( trackerCount > 1 )
2548        {
2549            int i;
2550            int prevTier = -1;
2551            tr_benc * tier = NULL;
2552            tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2553
2554            for( i=0; i<trackerCount; ++i ) {
2555                if( prevTier != trackers[i].tier ) {
2556                    prevTier = trackers[i].tier;
2557                    tier = tr_bencListAddList( announceList, 0 );
2558                }
2559                tr_bencListAddStr( tier, trackers[i].announce );
2560            }
2561        }
2562
2563        /* try to parse it back again, to make sure it's good */
2564        memset( &tmpInfo, 0, sizeof( tr_info ) );
2565        if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2566                              &hasInfo, &tor->infoDictLength ) )
2567        {
2568            /* it's good, so keep these new trackers and free the old ones */
2569
2570            tr_info swap;
2571            swap.trackers = tor->info.trackers;
2572            swap.trackerCount = tor->info.trackerCount;
2573            tor->info.trackers = tmpInfo.trackers;
2574            tor->info.trackerCount = tmpInfo.trackerCount;
2575            tmpInfo.trackers = swap.trackers;
2576            tmpInfo.trackerCount = swap.trackerCount;
2577
2578            tr_metainfoFree( &tmpInfo );
2579            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2580        }
2581
2582        /* cleanup */
2583        tr_bencFree( &metainfo );
2584
2585        /* if we had a tracker-related error on this torrent,
2586         * and that tracker's been removed,
2587         * then clear the error */
2588        if(    ( tor->error == TR_STAT_TRACKER_WARNING )
2589            || ( tor->error == TR_STAT_TRACKER_ERROR ) )
2590        {
2591            bool clear = true;
2592
2593            for( i=0; clear && i<trackerCount; ++i )
2594                if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2595                    clear = false;
2596
2597            if( clear )
2598                tr_torrentClearError( tor );
2599        }
2600
2601        /* tell the announcer to reload this torrent's tracker list */
2602        tr_announcerResetTorrent( tor->session->announcer, tor );
2603    }
2604
2605    tr_torrentUnlock( tor );
2606
2607    tr_free( trackers );
2608    return ok;
2609}
2610
2611/**
2612***
2613**/
2614
2615void
2616tr_torrentSetAddedDate( tr_torrent * tor,
2617                        time_t       t )
2618{
2619    assert( tr_isTorrent( tor ) );
2620
2621    tor->addedDate = t;
2622    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2623}
2624
2625void
2626tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2627{
2628    assert( tr_isTorrent( tor ) );
2629
2630    tor->activityDate = t;
2631    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2632}
2633
2634void
2635tr_torrentSetDoneDate( tr_torrent * tor,
2636                       time_t       t )
2637{
2638    assert( tr_isTorrent( tor ) );
2639
2640    tor->doneDate = t;
2641    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2642}
2643
2644/**
2645***
2646**/
2647
2648uint64_t
2649tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2650{
2651    tr_file_index_t i;
2652    uint64_t bytesLeft = 0;
2653
2654    assert( tr_isTorrent( tor ) );
2655
2656    for( i=0; i<tor->info.fileCount; ++i )
2657    {
2658        if( !tor->info.files[i].dnd )
2659        {
2660            struct stat sb;
2661            const uint64_t length = tor->info.files[i].length;
2662            char * path = tr_torrentFindFile( tor, i );
2663
2664            bytesLeft += length;
2665
2666            if( ( path != NULL ) && !stat( path, &sb )
2667                                 && S_ISREG( sb.st_mode )
2668                                 && ( (uint64_t)sb.st_size <= length ) )
2669                bytesLeft -= sb.st_size;
2670
2671            tr_free( path );
2672        }
2673    }
2674
2675    return bytesLeft;
2676}
2677
2678/****
2679*****  Removing the torrent's local data
2680****/
2681
2682static int
2683vstrcmp( const void * a, const void * b )
2684{
2685    return strcmp( a, b );
2686}
2687
2688static int
2689compareLongestFirst( const void * a, const void * b )
2690{
2691    const size_t alen = strlen( a );
2692    const size_t blen = strlen( b );
2693
2694    if( alen != blen )
2695        return alen > blen ? -1 : 1;
2696
2697    return vstrcmp( a, b );
2698}
2699
2700static void
2701addDirtyFile( const char  * root,
2702              const char  * filename,
2703              tr_ptrArray * dirtyFolders )
2704{
2705    char * dir = tr_dirname( filename );
2706
2707    /* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2708    while (     ( dir != NULL )
2709             && ( strlen( root ) <= strlen( dir ) )
2710             && ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2711    {
2712        char * tmp;
2713        tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2714
2715        tmp = tr_dirname( dir );
2716        tr_free( dir );
2717        dir = tmp;
2718    }
2719
2720    tr_free( dir );
2721}
2722
2723static bool
2724isSystemFile( const char * base )
2725{
2726    int i;
2727    static const char * stockFiles[] = { ".DS_Store", "desktop.ini", "Thumbs.db" };
2728    static const int stockFileCount = sizeof(stockFiles) / sizeof(stockFiles[0]);
2729
2730    for( i=0; i<stockFileCount; ++i )
2731        if( !strcmp( base, stockFiles[i] ) )
2732            return true;
2733
2734    /* check for resource forks. <http://support.apple.com/kb/TA20578> */
2735    if( !memcmp( base, "._", 2 ) )
2736        return true;
2737
2738    return false;
2739}
2740
2741static void
2742deleteLocalFile( const tr_torrent * tor, const char * filename, tr_fileFunc fileFunc )
2743{
2744    struct stat sb;
2745
2746    /* add safeguards for (1) making sure the file exists and
2747       (2) that we haven't somehow walked up past the torrent's top directory... */
2748    if( !stat( filename, &sb ) )
2749        if( !tr_is_same_file( tor->currentDir, filename ) )
2750            fileFunc( filename );
2751}
2752
2753static void
2754walkLocalData( const tr_torrent * tor,
2755               const char       * root,
2756               const char       * dir,
2757               const char       * base,
2758               tr_ptrArray      * torrentFiles,
2759               tr_ptrArray      * folders,
2760               tr_ptrArray      * dirtyFolders,
2761               tr_fileFunc        fileFunc )
2762{
2763    struct stat sb;
2764    char * buf = tr_buildPath( dir, base, NULL );
2765    int i = stat( buf, &sb );
2766
2767    if( !i )
2768    {
2769        DIR * odir = NULL;
2770
2771        if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2772        {
2773            struct dirent *d;
2774            tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2775            for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2776                if( d->d_name && strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2777                    walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders, fileFunc );
2778            closedir( odir );
2779        }
2780        else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2781        {
2782            if( isSystemFile( base ) )
2783                deleteLocalFile( tor, buf, fileFunc );
2784            else {
2785                 const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2786                const bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2787                if( !isTorrentFile )
2788                    addDirtyFile( root, buf, dirtyFolders );
2789            }
2790        }
2791    }
2792
2793    tr_free( buf );
2794}
2795
2796static void
2797deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2798{
2799    int i, n;
2800    char * tmp;
2801    char * root;
2802    char ** s;
2803    tr_file_index_t f;
2804    const char * cpch;
2805    const char * firstFile;
2806    tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2807    tr_ptrArray folders      = TR_PTR_ARRAY_INIT;
2808    tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2809
2810    if( !tr_torrentHasMetadata( tor ) )
2811        return;
2812
2813    firstFile = tor->info.files[0].name;
2814    cpch = strchr( firstFile, TR_PATH_DELIMITER );
2815    tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2816    root = tr_buildPath( tor->currentDir, tmp, NULL );
2817
2818    for( f=0; f<tor->info.fileCount; ++f ) {
2819        tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2820        tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2821    }
2822
2823    /* build the set of folders and dirtyFolders */
2824    walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders, fileFunc );
2825
2826    /* try to remove entire folders first, so that the recycle bin will be tidy */
2827    s = (char**) tr_ptrArrayPeek( &folders, &n );
2828    for( i=0; i<n; ++i )
2829        if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2830            deleteLocalFile( tor, s[i], fileFunc );
2831
2832    /* now blow away any remaining torrent files, such as torrent files in dirty folders */
2833    for( i=0, n=tr_ptrArraySize( &torrentFiles ); i<n; ++i ) {
2834        char * path = tr_buildPath( tor->currentDir, tr_ptrArrayNth( &torrentFiles, i ), NULL );
2835        deleteLocalFile( tor, path, fileFunc );
2836        tr_free( path );
2837    }
2838
2839    /* Now clean out the directories left empty from the previous step.
2840     * Work from deepest to shallowest s.t. lower folders
2841     * won't prevent the upper folders from being deleted */
2842    {
2843        tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2844        s = (char**) tr_ptrArrayPeek( &folders, &n );
2845        for( i=0; i<n; ++i )
2846            if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2847                tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2848        s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2849        for( i=0; i<n; ++i )
2850            deleteLocalFile( tor, s[i], fileFunc );
2851        tr_ptrArrayDestruct( &cleanFolders, NULL );
2852    }
2853
2854    /* cleanup */
2855    tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2856    tr_ptrArrayDestruct( &folders, tr_free );
2857    tr_ptrArrayDestruct( &torrentFiles, tr_free );
2858    tr_free( root );
2859    tr_free( tmp );
2860}
2861
2862static void
2863tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2864{
2865    assert( tr_isTorrent( tor ) );
2866
2867    if( fileFunc == NULL )
2868        fileFunc = remove;
2869
2870    /* close all the files because we're about to delete them */
2871    tr_cacheFlushTorrent( tor->session->cache, tor );
2872    tr_fdTorrentClose( tor->session, tor->uniqueId );
2873
2874    deleteLocalData( tor, fileFunc );
2875}
2876
2877/***
2878****
2879***/
2880
2881struct LocationData
2882{
2883    bool move_from_old_location;
2884    volatile int * setme_state;
2885    volatile double * setme_progress;
2886    char * location;
2887    tr_torrent * tor;
2888};
2889
2890static void
2891setLocation( void * vdata )
2892{
2893    bool err = false;
2894    struct LocationData * data = vdata;
2895    tr_torrent * tor = data->tor;
2896    const bool do_move = data->move_from_old_location;
2897    const char * location = data->location;
2898    double bytesHandled = 0;
2899
2900    assert( tr_isTorrent( tor ) );
2901
2902    tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2903            tr_torrentName(tor), tor->currentDir, location );
2904
2905    tr_mkdirp( location, 0777 );
2906
2907    if( !tr_is_same_file( location, tor->currentDir ) )
2908    {
2909        tr_file_index_t i;
2910
2911        /* bad idea to move files while they're being verified... */
2912        tr_verifyRemove( tor );
2913
2914        /* try to move the files.
2915         * FIXME: there are still all kinds of nasty cases, like what
2916         * if the target directory runs out of space halfway through... */
2917        for( i=0; !err && i<tor->info.fileCount; ++i )
2918        {
2919            const tr_file * f = &tor->info.files[i];
2920            const char * oldbase;
2921            char * sub;
2922            if( tr_torrentFindFile2( tor, i, &oldbase, &sub, NULL ) )
2923            {
2924                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2925                char * newpath = tr_buildPath( location, sub, NULL );
2926
2927                tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2928
2929                if( do_move && !tr_is_same_file( oldpath, newpath ) )
2930                {
2931                    bool renamed = false;
2932                    errno = 0;
2933                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2934                    if( tr_moveFile( oldpath, newpath, &renamed ) )
2935                    {
2936                        err = true;
2937                        tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2938                                        oldpath, newpath, tr_strerror( errno ) );
2939                    }
2940                }
2941
2942                tr_free( newpath );
2943                tr_free( oldpath );
2944                tr_free( sub );
2945            }
2946
2947            if( data->setme_progress )
2948            {
2949                bytesHandled += f->length;
2950                *data->setme_progress = bytesHandled / tor->info.totalSize;
2951            }
2952        }
2953
2954        if( !err )
2955        {
2956            /* blow away the leftover subdirectories in the old location */
2957            if( do_move )
2958                tr_torrentDeleteLocalData( tor, remove );
2959
2960            /* set the new location and reverify */
2961            tr_torrentSetDownloadDir( tor, location );
2962        }
2963    }
2964
2965    if( !err && do_move )
2966    {
2967        tr_free( tor->incompleteDir );
2968        tor->incompleteDir = NULL;
2969        tor->currentDir = tor->downloadDir;
2970    }
2971
2972    if( data->setme_state )
2973        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2974
2975    /* cleanup */
2976    tr_free( data->location );
2977    tr_free( data );
2978}
2979
2980void
2981tr_torrentSetLocation( tr_torrent       * tor,
2982                       const char       * location,
2983                       bool               move_from_old_location,
2984                       volatile double  * setme_progress,
2985                       volatile int     * setme_state )
2986{
2987    struct LocationData * data;
2988
2989    assert( tr_isTorrent( tor ) );
2990
2991    if( setme_state )
2992        *setme_state = TR_LOC_MOVING;
2993    if( setme_progress )
2994        *setme_progress = 0;
2995
2996    /* run this in the libtransmission thread */
2997    data = tr_new( struct LocationData, 1 );
2998    data->tor = tor;
2999    data->location = tr_strdup( location );
3000    data->move_from_old_location = move_from_old_location;
3001    data->setme_state = setme_state;
3002    data->setme_progress = setme_progress;
3003    tr_runInEventThread( tor->session, setLocation, data );
3004}
3005
3006/***
3007****
3008***/
3009
3010void
3011tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
3012{
3013    char * sub;
3014    const char * base;
3015    const tr_info * inf = &tor->info;
3016    const tr_file * f = &inf->files[fileNum];
3017    tr_piece * p;
3018    const tr_piece * pend;
3019    const time_t now = tr_time( );
3020
3021    /* close the file so that we can reopen in read-only mode as needed */
3022    tr_fdFileClose( tor->session, tor, fileNum );
3023
3024    /* now that the file is complete and closed, we can start watching its
3025     * mtime timestamp for changes to know if we need to reverify pieces */
3026    for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
3027        p->timeChecked = now;
3028
3029    /* if the torrent's current filename isn't the same as the one in the
3030     * metadata -- for example, if it had the ".part" suffix appended to
3031     * it until now -- then rename it to match the one in the metadata */
3032    if( tr_torrentFindFile2( tor, fileNum, &base, &sub, NULL ) )
3033    {
3034        if( strcmp( sub, f->name ) )
3035        {
3036            char * oldpath = tr_buildPath( base, sub, NULL );
3037            char * newpath = tr_buildPath( base, f->name, NULL );
3038
3039            if( rename( oldpath, newpath ) )
3040                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
3041
3042            tr_free( newpath );
3043            tr_free( oldpath );
3044        }
3045
3046        tr_free( sub );
3047    }
3048}
3049
3050/***
3051****
3052***/
3053
3054#ifdef SYS_DARWIN
3055 #define TR_STAT_MTIME(sb) ((sb).st_mtimespec.tv_sec)
3056#else
3057 #define TR_STAT_MTIME(sb) ((sb).st_mtime)
3058#endif
3059
3060
3061static bool
3062fileExists( const char * filename, time_t * mtime )
3063{
3064    struct stat sb;
3065    const bool ok = !stat( filename, &sb );
3066
3067    if( ok && ( mtime != NULL ) )
3068        *mtime = TR_STAT_MTIME( sb );
3069
3070    return ok;
3071}
3072
3073bool
3074tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
3075                     const char ** base, char ** subpath, time_t * mtime )
3076{
3077    char * part = NULL;
3078    const tr_file * file;
3079    const char * b = NULL;
3080    const char * s = NULL;
3081
3082    assert( tr_isTorrent( tor ) );
3083    assert( fileNum < tor->info.fileCount );
3084
3085    file = &tor->info.files[fileNum];
3086
3087    if( b == NULL ) {
3088        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3089        if( fileExists( filename, mtime ) ) {
3090            b = tor->downloadDir;
3091            s = file->name;
3092        }
3093        tr_free( filename );
3094    }
3095
3096    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3097        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3098        if( fileExists( filename, mtime ) ) {
3099            b = tor->incompleteDir;
3100            s = file->name;
3101        }
3102        tr_free( filename );
3103    }
3104
3105    if( b == NULL )
3106        part = tr_torrentBuildPartial( tor, fileNum );
3107
3108    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3109        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3110        if( fileExists( filename, mtime ) ) {
3111            b = tor->incompleteDir;
3112            s = part;
3113        }
3114        tr_free( filename );
3115    }
3116
3117    if( b == NULL) {
3118        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3119        if( fileExists( filename, mtime ) ) {
3120            b = tor->downloadDir;
3121            s = part;
3122        }
3123        tr_free( filename );
3124    }
3125
3126    if( base != NULL )
3127        *base = b;
3128    if( subpath != NULL )
3129        *subpath = tr_strdup( s );
3130
3131    tr_free( part );
3132    return b != NULL;
3133}
3134
3135char*
3136tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3137{
3138    char * subpath;
3139    char * ret = NULL;
3140    const char * base;
3141
3142    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath, NULL ) )
3143    {
3144        ret = tr_buildPath( base, subpath, NULL );
3145        tr_free( subpath );
3146    }
3147
3148    return ret;
3149}
3150
3151/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3152static void
3153refreshCurrentDir( tr_torrent * tor )
3154{
3155    const char * dir = NULL;
3156
3157    if( tor->incompleteDir == NULL )
3158        dir = tor->downloadDir;
3159    else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3160        dir = tor->incompleteDir;
3161    else if( !tr_torrentFindFile2( tor, 0, &dir, NULL, NULL ) )
3162        dir = tor->incompleteDir;
3163
3164    assert( dir != NULL );
3165    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
3166    tor->currentDir = dir;
3167}
3168
3169char*
3170tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3171{
3172    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3173}
3174
3175/***
3176****
3177***/
3178
3179static int
3180compareTorrentByQueuePosition( const void * va, const void * vb )
3181{
3182    const tr_torrent * a = * (const tr_torrent **) va;
3183    const tr_torrent * b = * (const tr_torrent **) vb;
3184
3185    return a->queuePosition - b->queuePosition;
3186}
3187
3188static bool
3189queueIsSequenced( tr_session * session )
3190{
3191    int i ;
3192    int n ;
3193    bool is_sequenced = true;
3194    tr_torrent * tor;
3195    tr_torrent ** tmp = tr_new( tr_torrent *, session->torrentCount );
3196
3197    /* get all the torrents */
3198    n = 0;
3199    tor = NULL;
3200    while(( tor = tr_torrentNext( session, tor )))
3201        tmp[n++] = tor;
3202
3203    /* sort them by position */
3204    qsort( tmp, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3205
3206#if 0
3207    fprintf( stderr, "%s", "queue: " );
3208    for( i=0; i<n; ++i )
3209        fprintf( stderr, "%d ", tmp[i]->queuePosition );
3210    fputc( '\n', stderr );
3211#endif
3212
3213    /* test them */
3214    for( i=0; is_sequenced && i<n; ++i )
3215        if( tmp[i]->queuePosition != i )
3216            is_sequenced = false;
3217
3218    tr_free( tmp );
3219    return is_sequenced;
3220}
3221
3222int
3223tr_torrentGetQueuePosition( const tr_torrent * tor )
3224{
3225    return tor->queuePosition;
3226}
3227
3228void
3229tr_torrentSetQueuePosition( tr_torrent * tor, int pos )
3230{
3231    int back = -1;
3232    tr_torrent * walk;
3233    const int old_pos = tor->queuePosition;
3234    const time_t now = tr_time( );
3235
3236    if( pos < 0 )
3237        pos = 0;
3238
3239    tor->queuePosition = -1;
3240
3241    walk = NULL;
3242    while(( walk = tr_torrentNext( tor->session, walk )))
3243    {
3244        if( old_pos < pos ) {
3245            if( ( old_pos <= walk->queuePosition ) && ( walk->queuePosition <= pos ) ) {
3246                walk->queuePosition--;
3247                walk->anyDate = now;
3248            }
3249        }
3250
3251        if( old_pos > pos ) {
3252            if( ( pos <= walk->queuePosition ) && ( walk->queuePosition < old_pos ) ) {
3253                walk->queuePosition++;
3254                walk->anyDate = now;
3255            }
3256        }
3257
3258        if( back < walk->queuePosition )
3259            back = walk->queuePosition;
3260    }
3261
3262    tor->queuePosition = MIN( pos, (back+1) );
3263    tor->anyDate = now;
3264
3265    assert( queueIsSequenced( tor->session ) );
3266}
3267
3268void
3269tr_torrentsQueueMoveTop( tr_torrent ** torrents_in, int n )
3270{
3271    int i;
3272    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3273    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3274    for( i=n-1; i>=0; --i )
3275        tr_torrentSetQueuePosition( torrents[i], 0 );
3276    tr_free( torrents );
3277}
3278
3279void
3280tr_torrentsQueueMoveUp( tr_torrent ** torrents_in, int n )
3281{
3282    int i;
3283    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3284    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3285    for( i=0; i<n; ++i )
3286        tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition - 1 );
3287    tr_free( torrents );
3288}
3289
3290void
3291tr_torrentsQueueMoveDown( tr_torrent ** torrents_in, int n )
3292{
3293    int i;
3294    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3295    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3296    for( i=n-1; i>=0; --i )
3297        tr_torrentSetQueuePosition( torrents[i], torrents[i]->queuePosition + 1 );
3298    tr_free( torrents );
3299}
3300
3301void
3302tr_torrentsQueueMoveBottom( tr_torrent ** torrents_in, int n )
3303{
3304    int i;
3305    tr_torrent ** torrents = tr_memdup( torrents_in, sizeof( tr_torrent * ) * n );
3306    qsort( torrents, n, sizeof( tr_torrent * ), compareTorrentByQueuePosition );
3307    for( i=0; i<n; ++i )
3308        tr_torrentSetQueuePosition( torrents[i], INT_MAX );
3309    tr_free( torrents );
3310}
3311
3312static void
3313torrentSetQueued( tr_torrent * tor, bool queued )
3314{
3315    assert( tr_isTorrent( tor ) );
3316    assert( tr_isBool( queued ) );
3317
3318    if( tr_torrentIsQueued( tor ) != queued )
3319    {
3320        tor->isQueued = queued;
3321        tor->anyDate = tr_time( );
3322    }
3323}
3324
3325void
3326tr_torrentSetQueueStartCallback( tr_torrent * torrent, void (*callback)( tr_torrent *, void * ), void * user_data )
3327{
3328    torrent->queue_started_callback = callback;
3329    torrent->queue_started_user_data = user_data;
3330}
3331
3332
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