source: trunk/libtransmission/torrent.c @ 11818

Last change on this file since 11818 was 11818, checked in by jordan, 11 years ago

(trunk libT) #3973 "JIT verification verifies fresh downloaded torrents" -- remove a debugging printf() statement that shouldn't have been checked in.

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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 11818 2011-02-02 23:33:25Z jordan $
11 */
12
13#include <sys/types.h> /* stat */
14#include <sys/stat.h> /* stat */
15#ifndef WIN32
16 #include <sys/wait.h> /* wait() */
17#else
18 #include <process.h>
19 #define waitpid(pid, status, options)  _cwait(status, pid, WAIT_CHILD)
20#endif
21#include <unistd.h> /* stat */
22#include <dirent.h>
23
24#include <assert.h>
25#include <limits.h> /* INT_MAX */
26#include <math.h>
27#include <stdarg.h>
28#include <string.h> /* memcmp */
29#include <stdlib.h> /* qsort */
30
31#include <event2/util.h> /* evutil_vsnprintf() */
32
33#include "transmission.h"
34#include "announcer.h"
35#include "bandwidth.h"
36#include "bencode.h"
37#include "cache.h"
38#include "completion.h"
39#include "crypto.h" /* for tr_sha1 */
40#include "resume.h"
41#include "fdlimit.h" /* tr_fdTorrentClose */
42#include "inout.h" /* tr_ioTestPiece() */
43#include "magnet.h"
44#include "metainfo.h"
45#include "peer-common.h" /* MAX_BLOCK_SIZE */
46#include "peer-mgr.h"
47#include "platform.h" /* TR_PATH_DELIMITER_STR */
48#include "ptrarray.h"
49#include "session.h"
50#include "torrent.h"
51#include "torrent-magnet.h"
52#include "trevent.h" /* tr_runInEventThread() */
53#include "utils.h"
54#include "verify.h"
55#include "version.h"
56
57/***
58****
59***/
60
61#define tr_deeplog_tor( tor, ... ) \
62    do { \
63        if( tr_deepLoggingIsActive( ) ) \
64            tr_deepLog( __FILE__, __LINE__, tr_torrentName( tor ), __VA_ARGS__ ); \
65    } while( 0 )
66
67/***
68****
69***/
70
71int
72tr_torrentId( const tr_torrent * tor )
73{
74    return tor->uniqueId;
75}
76
77tr_torrent*
78tr_torrentFindFromId( tr_session * session, int id )
79{
80    tr_torrent * tor = NULL;
81
82    while(( tor = tr_torrentNext( session, tor )))
83        if( tor->uniqueId == id )
84            return tor;
85
86    return NULL;
87}
88
89tr_torrent*
90tr_torrentFindFromHashString( tr_session *  session, const char * str )
91{
92    tr_torrent * tor = NULL;
93
94    while(( tor = tr_torrentNext( session, tor )))
95        if( !strcasecmp( str, tor->info.hashString ) )
96            return tor;
97
98    return NULL;
99}
100
101tr_torrent*
102tr_torrentFindFromHash( tr_session * session, const uint8_t * torrentHash )
103{
104    tr_torrent * tor = NULL;
105
106    while(( tor = tr_torrentNext( session, tor )))
107        if( *tor->info.hash == *torrentHash )
108            if( !memcmp( tor->info.hash, torrentHash, SHA_DIGEST_LENGTH ) )
109                return tor;
110
111    return NULL;
112}
113
114tr_torrent*
115tr_torrentFindFromMagnetLink( tr_session * session, const char * magnet )
116{
117    tr_magnet_info * info;
118    tr_torrent * tor = NULL;
119
120    if(( info = tr_magnetParse( magnet )))
121    {
122        tor = tr_torrentFindFromHash( session, info->hash );
123        tr_magnetFree( info );
124    }
125
126    return tor;
127}
128
129tr_torrent*
130tr_torrentFindFromObfuscatedHash( tr_session * session,
131                                  const uint8_t * obfuscatedTorrentHash )
132{
133    tr_torrent * tor = NULL;
134
135    while(( tor = tr_torrentNext( session, tor )))
136        if( !memcmp( tor->obfuscatedHash, obfuscatedTorrentHash,
137                     SHA_DIGEST_LENGTH ) )
138            return tor;
139
140    return NULL;
141}
142
143tr_bool
144tr_torrentIsPieceTransferAllowed( const tr_torrent  * tor,
145                                  tr_direction        direction )
146{
147    int limit;
148    tr_bool allowed = TRUE;
149
150    if( tr_torrentUsesSpeedLimit( tor, direction ) )
151        if( tr_torrentGetSpeedLimit_Bps( tor, direction ) <= 0 )
152            allowed = FALSE;
153
154    if( tr_torrentUsesSessionLimits( tor ) )
155        if( tr_sessionGetActiveSpeedLimit_Bps( tor->session, direction, &limit ) )
156            if( limit <= 0 )
157                allowed = FALSE;
158
159    return allowed;
160}
161
162/***
163****  PER-TORRENT UL / DL SPEEDS
164***/
165
166void
167tr_torrentSetSpeedLimit_Bps( tr_torrent * tor, tr_direction dir, int Bps )
168{
169    assert( tr_isTorrent( tor ) );
170    assert( tr_isDirection( dir ) );
171    assert( Bps >= 0 );
172
173    if( tr_bandwidthSetDesiredSpeed_Bps( tor->bandwidth, dir, Bps ) )
174        tr_torrentSetDirty( tor );
175}
176void
177tr_torrentSetSpeedLimit_KBps( tr_torrent * tor, tr_direction dir, int KBps )
178{
179    tr_torrentSetSpeedLimit_Bps( tor, dir, toSpeedBytes( KBps ) );
180}
181
182int
183tr_torrentGetSpeedLimit_Bps( const tr_torrent * tor, tr_direction dir )
184{
185    assert( tr_isTorrent( tor ) );
186    assert( tr_isDirection( dir ) );
187
188    return tr_bandwidthGetDesiredSpeed_Bps( tor->bandwidth, dir );
189}
190int
191tr_torrentGetSpeedLimit_KBps( const tr_torrent * tor, tr_direction dir )
192{
193    return toSpeedKBps( tr_torrentGetSpeedLimit_Bps( tor, dir ) );
194}
195
196void
197tr_torrentUseSpeedLimit( tr_torrent * tor, tr_direction dir, tr_bool do_use )
198{
199    assert( tr_isTorrent( tor ) );
200    assert( tr_isDirection( dir ) );
201
202    if( tr_bandwidthSetLimited( tor->bandwidth, dir, do_use ) )
203        tr_torrentSetDirty( tor );
204}
205
206tr_bool
207tr_torrentUsesSpeedLimit( const tr_torrent * tor, tr_direction dir )
208{
209    assert( tr_isTorrent( tor ) );
210    assert( tr_isDirection( dir ) );
211
212    return tr_bandwidthIsLimited( tor->bandwidth, dir );
213}
214
215void
216tr_torrentUseSessionLimits( tr_torrent * tor, tr_bool doUse )
217{
218    tr_bool changed;
219
220    assert( tr_isTorrent( tor ) );
221
222    changed = tr_bandwidthHonorParentLimits( tor->bandwidth, TR_UP, doUse );
223    changed |= tr_bandwidthHonorParentLimits( tor->bandwidth, TR_DOWN, doUse );
224
225    if( changed )
226        tr_torrentSetDirty( tor );
227}
228
229tr_bool
230tr_torrentUsesSessionLimits( const tr_torrent * tor )
231{
232    assert( tr_isTorrent( tor ) );
233
234    return tr_bandwidthAreParentLimitsHonored( tor->bandwidth, TR_UP );
235}
236
237/***
238****
239***/
240
241void
242tr_torrentSetRatioMode( tr_torrent *  tor, tr_ratiolimit mode )
243{
244    assert( tr_isTorrent( tor ) );
245    assert( mode==TR_RATIOLIMIT_GLOBAL || mode==TR_RATIOLIMIT_SINGLE || mode==TR_RATIOLIMIT_UNLIMITED  );
246
247    if( mode != tor->ratioLimitMode )
248    {
249        tor->ratioLimitMode = mode;
250
251        tr_torrentSetDirty( tor );
252    }
253}
254
255tr_ratiolimit
256tr_torrentGetRatioMode( const tr_torrent * tor )
257{
258    assert( tr_isTorrent( tor ) );
259
260    return tor->ratioLimitMode;
261}
262
263void
264tr_torrentSetRatioLimit( tr_torrent * tor, double desiredRatio )
265{
266    assert( tr_isTorrent( tor ) );
267
268    if( (int)(desiredRatio*100.0) != (int)(tor->desiredRatio*100.0) )
269    {
270        tor->desiredRatio = desiredRatio;
271
272        tr_torrentSetDirty( tor );
273    }
274}
275
276double
277tr_torrentGetRatioLimit( const tr_torrent * tor )
278{
279    assert( tr_isTorrent( tor ) );
280
281    return tor->desiredRatio;
282}
283
284tr_bool
285tr_torrentGetSeedRatio( const tr_torrent * tor, double * ratio )
286{
287    tr_bool isLimited;
288
289    switch( tr_torrentGetRatioMode( tor ) )
290    {
291        case TR_RATIOLIMIT_SINGLE:
292            isLimited = TRUE;
293            if( ratio )
294                *ratio = tr_torrentGetRatioLimit( tor );
295            break;
296
297        case TR_RATIOLIMIT_GLOBAL:
298            isLimited = tr_sessionIsRatioLimited( tor->session );
299            if( isLimited && ratio )
300                *ratio = tr_sessionGetRatioLimit( tor->session );
301            break;
302
303        default: /* TR_RATIOLIMIT_UNLIMITED */
304            isLimited = FALSE;
305            break;
306    }
307
308    return isLimited;
309}
310
311/* returns true if the seed ratio applies --
312 * it applies if the torrent's a seed AND it has a seed ratio set */
313static tr_bool
314tr_torrentGetSeedRatioBytes( tr_torrent  * tor,
315                             uint64_t    * setmeLeft,
316                             uint64_t    * setmeGoal )
317{
318    double seedRatio;
319    tr_bool seedRatioApplies = FALSE;
320
321    if( tr_torrentGetSeedRatio( tor, &seedRatio ) )
322    {
323        const uint64_t u = tor->uploadedCur + tor->uploadedPrev;
324        const uint64_t d = tor->downloadedCur + tor->downloadedPrev;
325        const uint64_t baseline = d ? d : tr_cpSizeWhenDone( &tor->completion );
326        const uint64_t goal = baseline * seedRatio;
327        if( setmeLeft ) *setmeLeft = goal > u ? goal - u : 0;
328        if( setmeGoal ) *setmeGoal = goal;
329        seedRatioApplies = tr_torrentIsSeed( tor );
330    }
331
332    return seedRatioApplies;
333}
334
335static tr_bool
336tr_torrentIsSeedRatioDone( tr_torrent * tor )
337{
338    uint64_t bytesLeft;
339    return tr_torrentGetSeedRatioBytes( tor, &bytesLeft, NULL ) && !bytesLeft;
340}
341
342/***
343****
344***/
345
346void
347tr_torrentSetIdleMode( tr_torrent *  tor, tr_idlelimit mode )
348{
349    assert( tr_isTorrent( tor ) );
350    assert( mode==TR_IDLELIMIT_GLOBAL || mode==TR_IDLELIMIT_SINGLE || mode==TR_IDLELIMIT_UNLIMITED  );
351
352    if( mode != tor->idleLimitMode )
353    {
354        tor->idleLimitMode = mode;
355
356        tr_torrentSetDirty( tor );
357    }
358}
359
360tr_idlelimit
361tr_torrentGetIdleMode( const tr_torrent * tor )
362{
363    assert( tr_isTorrent( tor ) );
364
365    return tor->idleLimitMode;
366}
367
368void
369tr_torrentSetIdleLimit( tr_torrent * tor, uint16_t idleMinutes )
370{
371    assert( tr_isTorrent( tor ) );
372
373    if( idleMinutes > 0 )
374    {
375        tor->idleLimitMinutes = idleMinutes;
376
377        tr_torrentSetDirty( tor );
378    }
379}
380
381uint16_t
382tr_torrentGetIdleLimit( const tr_torrent * tor )
383{
384    assert( tr_isTorrent( tor ) );
385
386    return tor->idleLimitMinutes;
387}
388
389tr_bool
390tr_torrentGetSeedIdle( const tr_torrent * tor, uint16_t * idleMinutes )
391{
392    tr_bool isLimited;
393
394    switch( tr_torrentGetIdleMode( tor ) )
395    {
396        case TR_IDLELIMIT_SINGLE:
397            isLimited = TRUE;
398            if( idleMinutes )
399                *idleMinutes = tr_torrentGetIdleLimit( tor );
400            break;
401
402        case TR_IDLELIMIT_GLOBAL:
403            isLimited = tr_sessionIsIdleLimited( tor->session );
404            if( isLimited && idleMinutes )
405                *idleMinutes = tr_sessionGetIdleLimit( tor->session );
406            break;
407
408        default: /* TR_IDLELIMIT_UNLIMITED */
409            isLimited = FALSE;
410            break;
411    }
412
413    return isLimited;
414}
415
416static tr_bool
417tr_torrentIsSeedIdleLimitDone( tr_torrent * tor )
418{
419    uint16_t idleMinutes;
420    return tr_torrentGetSeedIdle( tor, &idleMinutes )
421        && difftime(tr_time(), MAX(tor->startDate, tor->activityDate)) >= idleMinutes * 60u;
422}
423
424/***
425****
426***/
427
428void
429tr_torrentCheckSeedLimit( tr_torrent * tor )
430{
431    assert( tr_isTorrent( tor ) );
432
433    if( !tor->isRunning || !tr_torrentIsSeed( tor ) )
434        return;
435
436    /* if we're seeding and reach our seed ratio limit, stop the torrent */
437    if( tr_torrentIsSeedRatioDone( tor ) )
438    {
439        tr_torinf( tor, "Seed ratio reached; pausing torrent" );
440
441        tor->isStopping = TRUE;
442
443        /* maybe notify the client */
444        if( tor->ratio_limit_hit_func != NULL )
445            tor->ratio_limit_hit_func( tor, tor->ratio_limit_hit_func_user_data );
446    }
447    /* if we're seeding and reach our inactiviy limit, stop the torrent */
448    else if( tr_torrentIsSeedIdleLimitDone( tor ) )
449    {
450        tr_torinf( tor, "Seeding idle limit reached; pausing torrent" );
451
452        tor->isStopping = TRUE;
453        tor->finishedSeedingByIdle = TRUE;
454
455        /* maybe notify the client */
456        if( tor->idle_limit_hit_func != NULL )
457            tor->idle_limit_hit_func( tor, tor->idle_limit_hit_func_user_data );
458    }
459}
460
461/***
462****
463***/
464
465void
466tr_torrentSetLocalError( tr_torrent * tor, const char * fmt, ... )
467{
468    va_list ap;
469
470    assert( tr_isTorrent( tor ) );
471
472    va_start( ap, fmt );
473    tor->error = TR_STAT_LOCAL_ERROR;
474    tor->errorTracker[0] = '\0';
475    evutil_vsnprintf( tor->errorString, sizeof( tor->errorString ), fmt, ap );
476    va_end( ap );
477
478    tr_torerr( tor, "%s", tor->errorString );
479
480    if( tor->isRunning )
481        tor->isStopping = TRUE;
482}
483
484static void
485tr_torrentClearError( tr_torrent * tor )
486{
487    assert( tr_isTorrent( tor ) );
488
489    tor->error = TR_STAT_OK;
490    tor->errorString[0] = '\0';
491    tor->errorTracker[0] = '\0';
492}
493
494static void
495onTrackerResponse( tr_torrent * tor, const tr_tracker_event * event, void * unused UNUSED )
496{
497    switch( event->messageType )
498    {
499        case TR_TRACKER_PEERS:
500        {
501            size_t i;
502            const int8_t seedProbability = event->seedProbability;
503            const tr_bool allAreSeeds = seedProbability == 100;
504
505             if( allAreSeeds )
506                tr_tordbg( tor, "Got %zu seeds from tracker", event->pexCount );
507            else
508                tr_tordbg( tor, "Got %zu peers from tracker", event->pexCount );
509
510            for( i = 0; i < event->pexCount; ++i )
511                tr_peerMgrAddPex( tor, TR_PEER_FROM_TRACKER, &event->pex[i], seedProbability );
512
513            if( allAreSeeds && tr_torrentIsPrivate( tor ) )
514                tr_peerMgrMarkAllAsSeeds( tor );
515
516            break;
517        }
518
519        case TR_TRACKER_WARNING:
520            tr_torerr( tor, _( "Tracker warning: \"%s\"" ), event->text );
521            tor->error = TR_STAT_TRACKER_WARNING;
522            tr_strlcpy( tor->errorTracker, event->tracker, sizeof( tor->errorTracker ) );
523            tr_strlcpy( tor->errorString, event->text, sizeof( tor->errorString ) );
524            break;
525
526        case TR_TRACKER_ERROR:
527            tr_torerr( tor, _( "Tracker error: \"%s\"" ), event->text );
528            tor->error = TR_STAT_TRACKER_ERROR;
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_CLEAR:
534            if( tor->error != TR_STAT_LOCAL_ERROR )
535                tr_torrentClearError( tor );
536            break;
537    }
538}
539
540/***
541****
542****  TORRENT INSTANTIATION
543****
544***/
545
546static tr_piece_index_t
547getBytePiece( const tr_info * info, uint64_t byteOffset )
548{
549    assert( info );
550    assert( info->pieceSize != 0 );
551
552    return byteOffset / info->pieceSize;
553}
554
555static void
556initFilePieces( tr_info *       info,
557                tr_file_index_t fileIndex )
558{
559    tr_file * file;
560    uint64_t  firstByte, lastByte;
561
562    assert( info );
563    assert( fileIndex < info->fileCount );
564
565    file = &info->files[fileIndex];
566    firstByte = file->offset;
567    lastByte = firstByte + ( file->length ? file->length - 1 : 0 );
568    file->firstPiece = getBytePiece( info, firstByte );
569    file->lastPiece = getBytePiece( info, lastByte );
570}
571
572static int
573pieceHasFile( tr_piece_index_t piece,
574              const tr_file *  file )
575{
576    return ( file->firstPiece <= piece ) && ( piece <= file->lastPiece );
577}
578
579static tr_priority_t
580calculatePiecePriority( const tr_torrent * tor,
581                        tr_piece_index_t   piece,
582                        int                fileHint )
583{
584    tr_file_index_t i;
585    tr_priority_t priority = TR_PRI_LOW;
586
587    /* find the first file that has data in this piece */
588    if( fileHint >= 0 ) {
589        i = fileHint;
590        while( i > 0 && pieceHasFile( piece, &tor->info.files[i - 1] ) )
591            --i;
592    } else {
593        for( i = 0; i < tor->info.fileCount; ++i )
594            if( pieceHasFile( piece, &tor->info.files[i] ) )
595                break;
596    }
597
598    /* the piece's priority is the max of the priorities
599     * of all the files in that piece */
600    for( ; i < tor->info.fileCount; ++i )
601    {
602        const tr_file * file = &tor->info.files[i];
603
604        if( !pieceHasFile( piece, file ) )
605            break;
606
607        priority = MAX( priority, file->priority );
608
609        /* when dealing with multimedia files, getting the first and
610           last pieces can sometimes allow you to preview it a bit
611           before it's fully downloaded... */
612        if( file->priority >= TR_PRI_NORMAL )
613            if( file->firstPiece == piece || file->lastPiece == piece )
614                priority = TR_PRI_HIGH;
615    }
616
617    return priority;
618}
619
620static void
621tr_torrentInitFilePieces( tr_torrent * tor )
622{
623    int * firstFiles;
624    tr_file_index_t f;
625    tr_piece_index_t p;
626    uint64_t offset = 0;
627    tr_info * inf = &tor->info;
628
629    /* assign the file offsets */
630    for( f=0; f<inf->fileCount; ++f ) {
631        inf->files[f].offset = offset;
632        offset += inf->files[f].length;
633        initFilePieces( inf, f );
634    }
635
636    /* build the array of first-file hints to give calculatePiecePriority */
637    firstFiles = tr_new( int, inf->pieceCount );
638    for( p=f=0; p<inf->pieceCount; ++p ) {
639        while( inf->files[f].lastPiece < p )
640            ++f;
641        firstFiles[p] = f;
642    }
643
644#if 0
645    /* test to confirm the first-file hints are correct */
646    for( p=0; p<inf->pieceCount; ++p ) {
647        f = firstFiles[p];
648        assert( inf->files[f].firstPiece <= p );
649        assert( inf->files[f].lastPiece >= p );
650        if( f > 0 )
651            assert( inf->files[f-1].lastPiece < p );
652        for( f=0; f<inf->fileCount; ++f )
653            if( pieceHasFile( p, &inf->files[f] ) )
654                break;
655        assert( (int)f == firstFiles[p] );
656    }
657#endif
658
659    for( p=0; p<inf->pieceCount; ++p )
660        inf->pieces[p].priority = calculatePiecePriority( tor, p, firstFiles[p] );
661
662    tr_free( firstFiles );
663}
664
665static void torrentStart( tr_torrent * tor );
666
667/**
668 * Decide on a block size. Constraints:
669 * (1) most clients decline requests over 16 KiB
670 * (2) pieceSize must be a multiple of block size
671 */
672uint32_t
673tr_getBlockSize( uint32_t pieceSize )
674{
675    uint32_t b = pieceSize;
676
677    while( b > MAX_BLOCK_SIZE )
678        b /= 2u;
679
680    if( !b || ( pieceSize % b ) ) /* not cleanly divisible */
681        return 0;
682    return b;
683}
684
685static void refreshCurrentDir( tr_torrent * tor );
686
687static void
688torrentInitFromInfo( tr_torrent * tor )
689{
690    uint64_t t;
691    tr_info * info = &tor->info;
692
693    tor->blockSize = tr_getBlockSize( info->pieceSize );
694
695    if( info->pieceSize )
696        tor->lastPieceSize = (uint32_t)(info->totalSize % info->pieceSize);
697
698    if( !tor->lastPieceSize )
699        tor->lastPieceSize = info->pieceSize;
700
701    if( tor->blockSize )
702        tor->lastBlockSize = info->totalSize % tor->blockSize;
703
704    if( !tor->lastBlockSize )
705        tor->lastBlockSize = tor->blockSize;
706
707    tor->blockCount = tor->blockSize
708        ? ( info->totalSize + tor->blockSize - 1 ) / tor->blockSize
709        : 0;
710
711    tor->blockCountInPiece = tor->blockSize
712        ? info->pieceSize / tor->blockSize
713        : 0;
714
715    tor->blockCountInLastPiece = tor->blockSize
716        ? ( tor->lastPieceSize + tor->blockSize - 1 ) / tor->blockSize
717        : 0;
718
719    /* check our work */
720    if( tor->blockSize != 0 )
721        assert( ( info->pieceSize % tor->blockSize ) == 0 );
722    t = info->pieceCount - 1;
723    t *= info->pieceSize;
724    t += tor->lastPieceSize;
725    assert( t == info->totalSize );
726    t = tor->blockCount - 1;
727    t *= tor->blockSize;
728    t += tor->lastBlockSize;
729    assert( t == info->totalSize );
730    t = info->pieceCount - 1;
731    t *= tor->blockCountInPiece;
732    t += tor->blockCountInLastPiece;
733    assert( t == (uint64_t)tor->blockCount );
734
735    tr_cpConstruct( &tor->completion, tor );
736
737    tr_torrentInitFilePieces( tor );
738
739    tor->completeness = tr_cpGetStatus( &tor->completion );
740}
741
742static void tr_torrentFireMetadataCompleted( tr_torrent * tor );
743
744void
745tr_torrentGotNewInfoDict( tr_torrent * tor )
746{
747    torrentInitFromInfo( tor );
748
749    tr_torrentFireMetadataCompleted( tor );
750}
751
752static tr_bool
753hasAnyLocalData( const tr_torrent * tor )
754{
755    tr_file_index_t i;
756    tr_bool has_local_data = FALSE;
757    const tr_file_index_t n = tor->info.fileCount;
758
759    for( i=0; i<n && !has_local_data; ++i )
760    {
761        struct stat sb;
762        char * filename = tr_torrentFindFile( tor, i );
763
764        if( filename && !stat( filename, &sb ) )
765            has_local_data = TRUE;
766
767        tr_free( filename );
768    }
769
770    return has_local_data;
771}
772
773static tr_bool
774setLocalErrorIfFilesDisappeared( tr_torrent * tor )
775{
776    const tr_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    tr_bool isNewTorrent;
794    struct stat st;
795    static int nextUniqueId = 1;
796    tr_session * session = tr_ctorGetSession( ctor );
797
798    assert( session != NULL );
799
800    tr_sessionLock( session );
801
802    tor->session   = session;
803    tor->uniqueId = nextUniqueId++;
804    tor->magicNumber = TORRENT_MAGIC_NUMBER;
805
806    tr_sha1( tor->obfuscatedHash, "req2", 4,
807             tor->info.hash, SHA_DIGEST_LENGTH,
808             NULL );
809
810    if( !tr_ctorGetDownloadDir( ctor, TR_FORCE, &dir ) ||
811        !tr_ctorGetDownloadDir( ctor, TR_FALLBACK, &dir ) )
812            tor->downloadDir = tr_strdup( dir );
813
814    if( tr_ctorGetIncompleteDir( ctor, &dir ) )
815        dir = tr_sessionGetIncompleteDir( session );
816    if( tr_sessionIsIncompleteDirEnabled( session ) )
817        tor->incompleteDir = tr_strdup( dir );
818
819    tor->bandwidth = tr_bandwidthNew( session, session->bandwidth );
820
821    tor->bandwidth->priority = tr_ctorGetBandwidthPriority( ctor );
822
823    tor->error = TR_STAT_OK;
824
825    tor->finishedSeedingByIdle = FALSE;
826
827    tr_peerMgrAddTorrent( session->peerMgr, tor );
828
829    assert( !tor->downloadedCur );
830    assert( !tor->uploadedCur );
831
832    tr_torrentSetAddedDate( tor, tr_time( ) ); /* this is a default value to be
833                                                  overwritten by the resume file */
834
835    torrentInitFromInfo( tor );
836    loaded = tr_torrentLoadResume( tor, ~0, ctor );
837    tor->completeness = tr_cpGetStatus( &tor->completion );
838    setLocalErrorIfFilesDisappeared( tor );
839
840    tr_ctorInitTorrentPriorities( ctor, tor );
841    tr_ctorInitTorrentWanted( ctor, tor );
842
843    refreshCurrentDir( tor );
844
845    doStart = tor->isRunning;
846    tor->isRunning = 0;
847
848    if( !( loaded & TR_FR_SPEEDLIMIT ) )
849    {
850        tr_torrentUseSpeedLimit( tor, TR_UP, FALSE );
851        tr_torrentSetSpeedLimit_Bps( tor, TR_UP, tr_sessionGetSpeedLimit_Bps( tor->session, TR_UP ) );
852        tr_torrentUseSpeedLimit( tor, TR_DOWN, FALSE );
853        tr_torrentSetSpeedLimit_Bps( tor, TR_DOWN, tr_sessionGetSpeedLimit_Bps( tor->session, TR_DOWN ) );
854        tr_torrentUseSessionLimits( tor, TRUE );
855    }
856
857    if( !( loaded & TR_FR_RATIOLIMIT ) )
858    {
859        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_GLOBAL );
860        tr_torrentSetRatioLimit( tor, tr_sessionGetRatioLimit( tor->session ) );
861    }
862
863    if( !( loaded & TR_FR_IDLELIMIT ) )
864    {
865        tr_torrentSetIdleMode( tor, TR_IDLELIMIT_GLOBAL );
866        tr_torrentSetIdleLimit( tor, tr_sessionGetIdleLimit( tor->session ) );
867    }
868
869    {
870        tr_torrent * it = NULL;
871        tr_torrent * last = NULL;
872        while( ( it = tr_torrentNext( session, it ) ) )
873            last = it;
874
875        if( !last )
876            session->torrentList = tor;
877        else
878            last->next = tor;
879        ++session->torrentCount;
880    }
881
882    /* if we don't have a local .torrent file already, assume the torrent is new */
883    isNewTorrent = stat( tor->info.torrent, &st );
884
885    /* maybe save our own copy of the metainfo */
886    if( tr_ctorGetSave( ctor ) )
887    {
888        const tr_benc * val;
889        if( !tr_ctorGetMetainfo( ctor, &val ) )
890        {
891            const char * path = tor->info.torrent;
892            const int err = tr_bencToFile( val, TR_FMT_BENC, path );
893            if( err )
894                tr_torrentSetLocalError( tor, "Unable to save torrent file: %s", tr_strerror( err ) );
895            tr_sessionSetTorrentFile( tor->session, tor->info.hashString, path );
896        }
897    }
898
899    tor->tiers = tr_announcerAddTorrent( tor->session->announcer, tor, onTrackerResponse, NULL );
900
901    if( isNewTorrent )
902    {
903        tor->startAfterVerify = doStart;
904        tr_torrentVerify( tor );
905    }
906    else if( doStart )
907    {
908        torrentStart( tor );
909    }
910
911    tr_sessionUnlock( session );
912}
913
914static tr_parse_result
915torrentParseImpl( const tr_ctor * ctor, tr_info * setmeInfo,
916                  tr_bool * setmeHasInfo, int * dictLength )
917{
918    int             doFree;
919    tr_bool         didParse;
920    tr_bool         hasInfo = FALSE;
921    tr_info         tmp;
922    const tr_benc * metainfo;
923    tr_session    * session = tr_ctorGetSession( ctor );
924    tr_parse_result result = TR_PARSE_OK;
925
926    if( setmeInfo == NULL )
927        setmeInfo = &tmp;
928    memset( setmeInfo, 0, sizeof( tr_info ) );
929
930    if( tr_ctorGetMetainfo( ctor, &metainfo ) )
931        return TR_PARSE_ERR;
932
933    didParse = tr_metainfoParse( session, metainfo, setmeInfo,
934                                 &hasInfo, dictLength );
935    doFree = didParse && ( setmeInfo == &tmp );
936
937    if( !didParse )
938        result = TR_PARSE_ERR;
939
940    if( didParse && hasInfo && !tr_getBlockSize( setmeInfo->pieceSize ) )
941        result = TR_PARSE_ERR;
942
943    if( didParse && session && tr_torrentExists( session, setmeInfo->hash ) )
944        result = TR_PARSE_DUPLICATE;
945
946    if( doFree )
947        tr_metainfoFree( setmeInfo );
948
949    if( setmeHasInfo != NULL )
950        *setmeHasInfo = hasInfo;
951
952    return result;
953}
954
955tr_parse_result
956tr_torrentParse( const tr_ctor * ctor, tr_info * setmeInfo )
957{
958    return torrentParseImpl( ctor, setmeInfo, NULL, NULL );
959}
960
961tr_torrent *
962tr_torrentNew( const tr_ctor * ctor, int * setmeError )
963{
964    int len;
965    tr_bool hasInfo;
966    tr_info tmpInfo;
967    tr_parse_result r;
968    tr_torrent * tor = NULL;
969
970    assert( ctor != NULL );
971    assert( tr_isSession( tr_ctorGetSession( ctor ) ) );
972
973    r = torrentParseImpl( ctor, &tmpInfo, &hasInfo, &len );
974    if( r == TR_PARSE_OK )
975    {
976        tor = tr_new0( tr_torrent, 1 );
977        tor->info = tmpInfo;
978        if( hasInfo )
979            tor->infoDictLength = len;
980        torrentInit( tor, ctor );
981    }
982    else
983    {
984        if( r == TR_PARSE_DUPLICATE )
985            tr_metainfoFree( &tmpInfo );
986
987        if( setmeError )
988            *setmeError = r;
989    }
990
991    return tor;
992}
993
994/**
995***
996**/
997
998void
999tr_torrentSetDownloadDir( tr_torrent * tor, const char * path )
1000{
1001    assert( tr_isTorrent( tor  ) );
1002
1003    if( !path || !tor->downloadDir || strcmp( path, tor->downloadDir ) )
1004    {
1005        tr_free( tor->downloadDir );
1006        tor->downloadDir = tr_strdup( path );
1007        tr_torrentSetDirty( tor );
1008    }
1009
1010    refreshCurrentDir( tor );
1011}
1012
1013const char*
1014tr_torrentGetDownloadDir( const tr_torrent * tor )
1015{
1016    assert( tr_isTorrent( tor  ) );
1017
1018    return tor->downloadDir;
1019}
1020
1021const char *
1022tr_torrentGetCurrentDir( const tr_torrent * tor )
1023{
1024    assert( tr_isTorrent( tor  ) );
1025
1026    return tor->currentDir;
1027}
1028
1029
1030void
1031tr_torrentChangeMyPort( tr_torrent * tor )
1032{
1033    assert( tr_isTorrent( tor  ) );
1034
1035    if( tor->isRunning )
1036        tr_announcerChangeMyPort( tor );
1037}
1038
1039static inline void
1040tr_torrentManualUpdateImpl( void * vtor )
1041{
1042    tr_torrent * tor = vtor;
1043
1044    assert( tr_isTorrent( tor  ) );
1045
1046    if( tor->isRunning )
1047        tr_announcerManualAnnounce( tor );
1048}
1049
1050void
1051tr_torrentManualUpdate( tr_torrent * tor )
1052{
1053    assert( tr_isTorrent( tor  ) );
1054
1055    tr_runInEventThread( tor->session, tr_torrentManualUpdateImpl, tor );
1056}
1057
1058tr_bool
1059tr_torrentCanManualUpdate( const tr_torrent * tor )
1060{
1061    return ( tr_isTorrent( tor  ) )
1062        && ( tor->isRunning )
1063        && ( tr_announcerCanManualAnnounce( tor ) );
1064}
1065
1066const tr_info *
1067tr_torrentInfo( const tr_torrent * tor )
1068{
1069    return tr_isTorrent( tor ) ? &tor->info : NULL;
1070}
1071
1072const tr_stat *
1073tr_torrentStatCached( tr_torrent * tor )
1074{
1075    const time_t now = tr_time( );
1076
1077    return tr_isTorrent( tor ) && ( now == tor->lastStatTime )
1078         ? &tor->stats
1079         : tr_torrentStat( tor );
1080}
1081
1082void
1083tr_torrentSetVerifyState( tr_torrent * tor, tr_verify_state state )
1084{
1085    assert( tr_isTorrent( tor ) );
1086    assert( state==TR_VERIFY_NONE || state==TR_VERIFY_WAIT || state==TR_VERIFY_NOW );
1087
1088    tor->verifyState = state;
1089    tor->anyDate = tr_time( );
1090}
1091
1092tr_torrent_activity
1093tr_torrentGetActivity( tr_torrent * tor )
1094{
1095    assert( tr_isTorrent( tor ) );
1096
1097    tr_torrentRecheckCompleteness( tor );
1098
1099    if( tor->verifyState == TR_VERIFY_NOW )
1100        return TR_STATUS_CHECK;
1101    if( tor->verifyState == TR_VERIFY_WAIT )
1102        return TR_STATUS_CHECK_WAIT;
1103    if( !tor->isRunning )
1104        return TR_STATUS_STOPPED;
1105    if( tor->completeness == TR_LEECH )
1106        return TR_STATUS_DOWNLOAD;
1107
1108    return TR_STATUS_SEED;
1109}
1110
1111static double
1112getVerifyProgress( const tr_torrent * tor )
1113{
1114    tr_piece_index_t i, n;
1115    tr_piece_index_t checked = 0;
1116
1117    assert( tr_isTorrent( tor ) );
1118
1119    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
1120        if( tor->info.pieces[i].timeChecked )
1121            ++checked;
1122
1123    return checked / (double)tor->info.pieceCount;
1124}
1125
1126const tr_stat *
1127tr_torrentStat( tr_torrent * tor )
1128{
1129    tr_stat *               s;
1130    int                     usableSeeds;
1131    uint64_t                now;
1132    double                  d;
1133    uint64_t                seedRatioBytesLeft;
1134    uint64_t                seedRatioBytesGoal;
1135    tr_bool                 seedRatioApplies;
1136    uint16_t                seedIdleMinutes;
1137
1138    if( !tor )
1139        return NULL;
1140
1141    assert( tr_isTorrent( tor ) );
1142    tr_torrentLock( tor );
1143
1144    tor->lastStatTime = tr_time( );
1145
1146    s = &tor->stats;
1147    s->id = tor->uniqueId;
1148    s->activity = tr_torrentGetActivity( tor );
1149    s->error = tor->error;
1150    memcpy( s->errorString, tor->errorString, sizeof( s->errorString ) );
1151
1152    s->manualAnnounceTime = tr_announcerNextManualAnnounce( tor );
1153
1154    tr_peerMgrTorrentStats( tor,
1155                            &s->peersKnown,
1156                            &s->peersConnected,
1157                            &usableSeeds,
1158                            &s->webseedsSendingToUs,
1159                            &s->peersSendingToUs,
1160                            &s->peersGettingFromUs,
1161                            s->peersFrom );
1162
1163    now = tr_time_msec( );
1164    d = tr_peerMgrGetWebseedSpeed_Bps( tor, now );
1165    s->rawUploadSpeed_KBps     = toSpeedKBps( tr_bandwidthGetRawSpeed_Bps  ( tor->bandwidth, now, TR_UP ) );
1166    s->pieceUploadSpeed_KBps   = toSpeedKBps( tr_bandwidthGetPieceSpeed_Bps( tor->bandwidth, now, TR_UP ) );
1167    s->rawDownloadSpeed_KBps   = toSpeedKBps( d + tr_bandwidthGetRawSpeed_Bps  ( tor->bandwidth, now, TR_DOWN ) );
1168    s->pieceDownloadSpeed_KBps = toSpeedKBps( d + tr_bandwidthGetPieceSpeed_Bps( tor->bandwidth, now, TR_DOWN ) );
1169
1170    usableSeeds += tor->info.webseedCount;
1171
1172    s->percentComplete = tr_cpPercentComplete ( &tor->completion );
1173    s->metadataPercentComplete = tr_torrentGetMetadataPercent( tor );
1174
1175    s->percentDone         = tr_cpPercentDone  ( &tor->completion );
1176    s->leftUntilDone       = tr_cpLeftUntilDone( &tor->completion );
1177    s->sizeWhenDone        = tr_cpSizeWhenDone ( &tor->completion );
1178    s->recheckProgress     = s->activity == TR_STATUS_CHECK ? getVerifyProgress( tor ) : 0;
1179    s->activityDate        = tor->activityDate;
1180    s->addedDate           = tor->addedDate;
1181    s->doneDate            = tor->doneDate;
1182    s->startDate           = tor->startDate;
1183    s->secondsSeeding      = tor->secondsSeeding;
1184    s->secondsDownloading  = tor->secondsDownloading;
1185
1186    if ((s->activity == TR_STATUS_DOWNLOAD || s->activity == TR_STATUS_SEED) && s->startDate != 0)
1187        s->idleSecs = difftime(tr_time(), MAX(s->startDate, s->activityDate));
1188    else
1189        s->idleSecs = -1;
1190
1191    s->corruptEver     = tor->corruptCur    + tor->corruptPrev;
1192    s->downloadedEver  = tor->downloadedCur + tor->downloadedPrev;
1193    s->uploadedEver    = tor->uploadedCur   + tor->uploadedPrev;
1194    s->haveValid       = tr_cpHaveValid( &tor->completion );
1195    s->haveUnchecked   = tr_cpHaveTotal( &tor->completion ) - s->haveValid;
1196
1197    if( usableSeeds > 0 )
1198    {
1199        s->desiredAvailable = s->leftUntilDone;
1200    }
1201    else if( !s->leftUntilDone || !s->peersConnected )
1202    {
1203        s->desiredAvailable = 0;
1204    }
1205    else
1206    {
1207        tr_piece_index_t i;
1208        tr_bitfield *    peerPieces = tr_peerMgrGetAvailable( tor );
1209        s->desiredAvailable = 0;
1210        for( i = 0; i < tor->info.pieceCount; ++i )
1211            if( !tor->info.pieces[i].dnd && tr_bitfieldHasFast( peerPieces, i ) )
1212                s->desiredAvailable += tr_cpMissingBlocksInPiece( &tor->completion, i );
1213        s->desiredAvailable *= tor->blockSize;
1214        tr_bitfieldFree( peerPieces );
1215    }
1216
1217    s->ratio = tr_getRatio( s->uploadedEver,
1218                            s->downloadedEver ? s->downloadedEver : s->haveValid );
1219
1220    seedRatioApplies = tr_torrentGetSeedRatioBytes( tor, &seedRatioBytesLeft,
1221                                                         &seedRatioBytesGoal );
1222
1223    switch( s->activity )
1224    {
1225        /* etaXLSpeed exists because if we use the piece speed directly,
1226         * brief fluctuations cause the ETA to jump all over the place.
1227         * so, etaXLSpeed is a smoothed-out version of the piece speed
1228         * to dampen the effect of fluctuations */
1229
1230        case TR_STATUS_DOWNLOAD:
1231            if( ( tor->etaDLSpeedCalculatedAt + 800 ) < now ) {
1232                tor->etaDLSpeed_KBps = ( ( tor->etaDLSpeedCalculatedAt + 4000 ) < now )
1233                    ? s->pieceDownloadSpeed_KBps /* if no recent previous speed, no need to smooth */
1234                    : ((tor->etaDLSpeed_KBps*4.0) + s->pieceDownloadSpeed_KBps)/5.0; /* smooth across 5 readings */
1235                tor->etaDLSpeedCalculatedAt = now;
1236            }
1237
1238            if( s->leftUntilDone > s->desiredAvailable )
1239                s->eta = TR_ETA_NOT_AVAIL;
1240            else if( tor->etaDLSpeed_KBps < 1 )
1241                s->eta = TR_ETA_UNKNOWN;
1242            else
1243                s->eta = s->leftUntilDone / toSpeedBytes(tor->etaDLSpeed_KBps);
1244
1245            s->etaIdle = TR_ETA_NOT_AVAIL;
1246            break;
1247
1248        case TR_STATUS_SEED: {
1249            if( !seedRatioApplies )
1250                s->eta = TR_ETA_NOT_AVAIL;
1251            else {
1252                if( ( tor->etaULSpeedCalculatedAt + 800 ) < now ) {
1253                    tor->etaULSpeed_KBps = ( ( tor->etaULSpeedCalculatedAt + 4000 ) < now )
1254                        ? s->pieceUploadSpeed_KBps /* if no recent previous speed, no need to smooth */
1255                        : ((tor->etaULSpeed_KBps*4.0) + s->pieceUploadSpeed_KBps)/5.0; /* smooth across 5 readings */
1256                    tor->etaULSpeedCalculatedAt = now;
1257                }
1258                if( tor->etaULSpeed_KBps < 1 )
1259                    s->eta = TR_ETA_UNKNOWN;
1260                else
1261                    s->eta = seedRatioBytesLeft / toSpeedBytes(tor->etaULSpeed_KBps);
1262            }
1263
1264            if( tor->etaULSpeed_KBps < 1 && tr_torrentGetSeedIdle( tor, &seedIdleMinutes ) )
1265                s->etaIdle = seedIdleMinutes * 60 - s->idleSecs;
1266            else
1267                s->etaIdle = TR_ETA_NOT_AVAIL;
1268            break;
1269        }
1270
1271        default:
1272            s->eta = TR_ETA_NOT_AVAIL;
1273            s->etaIdle = TR_ETA_NOT_AVAIL;
1274            break;
1275    }
1276
1277    /* s->haveValid is here to make sure a torrent isn't marked 'finished'
1278     * when the user hits "uncheck all" prior to starting the torrent... */
1279    s->finished = tor->finishedSeedingByIdle || (seedRatioApplies && !seedRatioBytesLeft && s->haveValid);
1280
1281    if( !seedRatioApplies || s->finished )
1282        s->seedRatioPercentDone = 1;
1283    else if( !seedRatioBytesGoal ) /* impossible? safeguard for div by zero */
1284        s->seedRatioPercentDone = 0;
1285    else
1286        s->seedRatioPercentDone = (double)(seedRatioBytesGoal - seedRatioBytesLeft) / seedRatioBytesGoal;
1287
1288    tr_torrentUnlock( tor );
1289
1290    return s;
1291}
1292
1293/***
1294****
1295***/
1296
1297static uint64_t
1298fileBytesCompleted( const tr_torrent * tor, tr_file_index_t index )
1299{
1300    uint64_t total = 0;
1301    const tr_file * f = &tor->info.files[index];
1302
1303    if( f->length )
1304    {
1305        const tr_block_index_t firstBlock = f->offset / tor->blockSize;
1306        const uint64_t lastByte = f->offset + f->length - 1;
1307        const tr_block_index_t lastBlock = lastByte / tor->blockSize;
1308
1309        if( firstBlock == lastBlock )
1310        {
1311            if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
1312                total = f->length;
1313        }
1314        else
1315        {
1316            tr_block_index_t i;
1317
1318            /* the first block */
1319            if( tr_cpBlockIsCompleteFast( &tor->completion, firstBlock ) )
1320                total += tor->blockSize - ( f->offset % tor->blockSize );
1321
1322            /* the middle blocks */
1323            if( f->firstPiece == f->lastPiece )
1324            {
1325                for( i=firstBlock+1; i<lastBlock; ++i )
1326                    if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1327                        total += tor->blockSize;
1328            }
1329            else
1330            {
1331                uint64_t b = 0;
1332                const tr_block_index_t firstBlockOfLastPiece
1333                           = tr_torPieceFirstBlock( tor, f->lastPiece );
1334                const tr_block_index_t lastBlockOfFirstPiece
1335                           = tr_torPieceFirstBlock( tor, f->firstPiece )
1336                             + tr_torPieceCountBlocks( tor, f->firstPiece ) - 1;
1337
1338                /* the rest of the first piece */
1339                for( i=firstBlock+1; i<lastBlock && i<=lastBlockOfFirstPiece; ++i )
1340                    if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1341                        ++b;
1342
1343                /* the middle pieces */
1344                if( f->firstPiece + 1 < f->lastPiece )
1345                    for( i=f->firstPiece+1; i<f->lastPiece; ++i )
1346                        b += tor->blockCountInPiece - tr_cpMissingBlocksInPiece( &tor->completion, i );
1347
1348                /* the rest of the last piece */
1349                for( i=firstBlockOfLastPiece; i<lastBlock; ++i )
1350                    if( tr_cpBlockIsCompleteFast( &tor->completion, i ) )
1351                        ++b;
1352
1353                b *= tor->blockSize;
1354                total += b;
1355            }
1356
1357            /* the last block */
1358            if( tr_cpBlockIsCompleteFast( &tor->completion, lastBlock ) )
1359                total += ( f->offset + f->length ) - ( (uint64_t)tor->blockSize * lastBlock );
1360        }
1361    }
1362
1363    return total;
1364}
1365
1366tr_file_stat *
1367tr_torrentFiles( const tr_torrent * tor,
1368                 tr_file_index_t *  fileCount )
1369{
1370    tr_file_index_t       i;
1371    const tr_file_index_t n = tor->info.fileCount;
1372    tr_file_stat *        files = tr_new0( tr_file_stat, n );
1373    tr_file_stat *        walk = files;
1374    const tr_bool         isSeed = tor->completeness == TR_SEED;
1375
1376    assert( tr_isTorrent( tor ) );
1377
1378    for( i=0; i<n; ++i, ++walk ) {
1379        const uint64_t b = isSeed ? tor->info.files[i].length : fileBytesCompleted( tor, i );
1380        walk->bytesCompleted = b;
1381        walk->progress = tor->info.files[i].length > 0 ? ( (float)b / tor->info.files[i].length ) : 1.0f;
1382    }
1383
1384    if( fileCount )
1385        *fileCount = n;
1386
1387    return files;
1388}
1389
1390void
1391tr_torrentFilesFree( tr_file_stat *            files,
1392                     tr_file_index_t fileCount UNUSED )
1393{
1394    tr_free( files );
1395}
1396
1397/***
1398****
1399***/
1400
1401double*
1402tr_torrentWebSpeeds_KBps( const tr_torrent * tor )
1403{
1404    double * ret = NULL;
1405
1406    if( tr_isTorrent( tor ) )
1407    {
1408        tr_torrentLock( tor );
1409        ret = tr_peerMgrWebSpeeds_KBps( tor );
1410        tr_torrentUnlock( tor );
1411    }
1412
1413    return ret;
1414}
1415
1416tr_peer_stat *
1417tr_torrentPeers( const tr_torrent * tor, int * peerCount )
1418{
1419    tr_peer_stat * ret = NULL;
1420
1421    if( tr_isTorrent( tor ) )
1422    {
1423        tr_torrentLock( tor );
1424        ret = tr_peerMgrPeerStats( tor, peerCount );
1425        tr_torrentUnlock( tor );
1426    }
1427
1428    return ret;
1429}
1430
1431void
1432tr_torrentPeersFree( tr_peer_stat * peers, int peerCount UNUSED )
1433{
1434    tr_free( peers );
1435}
1436
1437tr_tracker_stat *
1438tr_torrentTrackers( const tr_torrent * torrent, int * setmeTrackerCount )
1439{
1440    tr_tracker_stat * ret = NULL;
1441
1442    if( tr_isTorrent( torrent ) )
1443    {
1444        tr_torrentLock( torrent );
1445        ret = tr_announcerStats( torrent, setmeTrackerCount );
1446        tr_torrentUnlock( torrent );
1447    }
1448
1449    return ret;
1450}
1451
1452void
1453tr_torrentTrackersFree( tr_tracker_stat * trackers, int trackerCount )
1454{
1455    tr_announcerStatsFree( trackers, trackerCount );
1456}
1457
1458void
1459tr_torrentAvailability( const tr_torrent * tor, int8_t * tab, int size )
1460{
1461    if( tr_isTorrent( tor ) && ( tab != NULL ) && ( size > 0 ) )
1462    {
1463        tr_torrentLock( tor );
1464        tr_peerMgrTorrentAvailability( tor, tab, size );
1465        tr_torrentUnlock( tor );
1466    }
1467}
1468
1469void
1470tr_torrentAmountFinished( const tr_torrent * tor,
1471                          float *            tab,
1472                          int                size )
1473{
1474    assert( tr_isTorrent( tor ) );
1475
1476    tr_torrentLock( tor );
1477    tr_cpGetAmountDone( &tor->completion, tab, size );
1478    tr_torrentUnlock( tor );
1479}
1480
1481static void
1482tr_torrentResetTransferStats( tr_torrent * tor )
1483{
1484    assert( tr_isTorrent( tor ) );
1485
1486    tr_torrentLock( tor );
1487
1488    tor->downloadedPrev += tor->downloadedCur;
1489    tor->downloadedCur   = 0;
1490    tor->uploadedPrev   += tor->uploadedCur;
1491    tor->uploadedCur     = 0;
1492    tor->corruptPrev    += tor->corruptCur;
1493    tor->corruptCur      = 0;
1494
1495    tr_torrentSetDirty( tor );
1496
1497    tr_torrentUnlock( tor );
1498}
1499
1500void
1501tr_torrentSetHasPiece( tr_torrent *     tor,
1502                       tr_piece_index_t pieceIndex,
1503                       tr_bool          has )
1504{
1505    assert( tr_isTorrent( tor ) );
1506    assert( pieceIndex < tor->info.pieceCount );
1507
1508    if( has )
1509        tr_cpPieceAdd( &tor->completion, pieceIndex );
1510    else
1511        tr_cpPieceRem( &tor->completion, pieceIndex );
1512}
1513
1514/***
1515****
1516***/
1517
1518static void
1519freeTorrent( tr_torrent * tor )
1520{
1521    tr_torrent * t;
1522    tr_session *  session = tor->session;
1523    tr_info *    inf = &tor->info;
1524
1525    assert( tr_isTorrent( tor ) );
1526    assert( !tor->isRunning );
1527
1528    tr_sessionLock( session );
1529
1530    tr_peerMgrRemoveTorrent( tor );
1531
1532    tr_cpDestruct( &tor->completion );
1533
1534    tr_announcerRemoveTorrent( session->announcer, tor );
1535
1536    tr_free( tor->downloadDir );
1537    tr_free( tor->incompleteDir );
1538    tr_free( tor->peer_id );
1539
1540    if( tor == session->torrentList )
1541        session->torrentList = tor->next;
1542    else for( t = session->torrentList; t != NULL; t = t->next ) {
1543        if( t->next == tor ) {
1544            t->next = tor->next;
1545            break;
1546        }
1547    }
1548
1549    assert( session->torrentCount >= 1 );
1550    session->torrentCount--;
1551
1552    tr_bandwidthFree( tor->bandwidth );
1553
1554    tr_metainfoFree( inf );
1555    tr_free( tor );
1556
1557    tr_sessionUnlock( session );
1558}
1559
1560/**
1561***  Start/Stop Callback
1562**/
1563
1564static void
1565torrentStartImpl( void * vtor )
1566{
1567    time_t now;
1568    tr_torrent * tor = vtor;
1569
1570    assert( tr_isTorrent( tor ) );
1571
1572    tr_sessionLock( tor->session );
1573
1574    tr_torrentRecheckCompleteness( tor );
1575
1576    now = tr_time( );
1577    tor->isRunning = TRUE;
1578    tor->completeness = tr_cpGetStatus( &tor->completion );
1579    tor->startDate = tor->anyDate = now;
1580    tr_torrentClearError( tor );
1581    tor->finishedSeedingByIdle = FALSE;
1582
1583    tr_torrentResetTransferStats( tor );
1584    tr_announcerTorrentStarted( tor );
1585    tor->dhtAnnounceAt = now + tr_cryptoWeakRandInt( 20 );
1586    tor->dhtAnnounce6At = now + tr_cryptoWeakRandInt( 20 );
1587    tor->lpdAnnounceAt = now;
1588    tr_peerMgrStartTorrent( tor );
1589
1590    tr_sessionUnlock( tor->session );
1591}
1592
1593uint64_t
1594tr_torrentGetCurrentSizeOnDisk( const tr_torrent * tor )
1595{
1596    tr_file_index_t i;
1597    uint64_t byte_count = 0;
1598    const tr_file_index_t n = tor->info.fileCount;
1599
1600    for( i=0; i<n; ++i )
1601    {
1602        struct stat sb;
1603        char * filename = tr_torrentFindFile( tor, i );
1604
1605        sb.st_size = 0;
1606        if( filename && !stat( filename, &sb ) )
1607            byte_count += sb.st_size;
1608
1609        tr_free( filename );
1610    }
1611
1612    return byte_count;
1613}
1614
1615static void
1616torrentStart( tr_torrent * tor )
1617{
1618    assert( tr_isTorrent( tor ) );
1619
1620    /* already running... */
1621    if( tor->isRunning )
1622        return;
1623
1624    /* don't allow the torrent to be started if the files disappeared */
1625    if( setLocalErrorIfFilesDisappeared( tor ) )
1626        return;
1627
1628    /* verifying right now... wait until that's done so
1629     * we'll know what completeness to use/announce */
1630    if( tor->verifyState != TR_VERIFY_NONE ) {
1631        tor->startAfterVerify = TRUE;
1632        return;
1633    }
1634
1635    /* otherwise, start it now... */
1636    tr_sessionLock( tor->session );
1637
1638    /* allow finished torrents to be resumed */
1639    if( tr_torrentIsSeedRatioDone( tor ) ) {
1640        tr_torinf( tor, _( "Restarted manually -- disabling its seed ratio" ) );
1641        tr_torrentSetRatioMode( tor, TR_RATIOLIMIT_UNLIMITED );
1642    }
1643
1644    /* corresponds to the peer_id sent as a tracker request parameter.
1645     * one tracker admin says: "When the same torrent is opened and
1646     * closed and opened again without quitting Transmission ...
1647     * change the peerid. It would help sometimes if a stopped event
1648     * was missed to ensure that we didn't think someone was cheating. */
1649    tr_free( tor->peer_id );
1650    tor->peer_id = tr_peerIdNew( );
1651    tor->isRunning = 1;
1652    tr_torrentSetDirty( tor );
1653    tr_runInEventThread( tor->session, torrentStartImpl, tor );
1654
1655    tr_sessionUnlock( tor->session );
1656}
1657
1658void
1659tr_torrentStart( tr_torrent * tor )
1660{
1661    if( tr_isTorrent( tor ) )
1662        torrentStart( tor );
1663}
1664
1665static void
1666torrentRecheckDoneImpl( void * vtor )
1667{
1668    tr_torrent * tor = vtor;
1669    assert( tr_isTorrent( tor ) );
1670
1671    tr_torrentRecheckCompleteness( tor );
1672
1673    if( tor->startAfterVerify ) {
1674        tor->startAfterVerify = FALSE;
1675        torrentStart( tor );
1676    }
1677}
1678
1679static void
1680torrentRecheckDoneCB( tr_torrent * tor )
1681{
1682    assert( tr_isTorrent( tor ) );
1683
1684    tr_runInEventThread( tor->session, torrentRecheckDoneImpl, tor );
1685}
1686
1687static void
1688verifyTorrent( void * vtor )
1689{
1690    tr_torrent * tor = vtor;
1691
1692    assert( tr_isTorrent( tor ) );
1693    tr_sessionLock( tor->session );
1694
1695    /* if the torrent's already being verified, stop it */
1696    tr_verifyRemove( tor );
1697
1698    /* if the torrent's running, stop it & set the restart-after-verify flag */
1699    if( tor->startAfterVerify || tor->isRunning ) {
1700        /* don't clobber isStopping */
1701        const tr_bool startAfter = tor->isStopping ? FALSE : TRUE;
1702        tr_torrentStop( tor );
1703        tor->startAfterVerify = startAfter;
1704    }
1705
1706    if( setLocalErrorIfFilesDisappeared( tor ) )
1707        tor->startAfterVerify = FALSE;
1708    else
1709        tr_verifyAdd( tor, torrentRecheckDoneCB );
1710
1711    tr_sessionUnlock( tor->session );
1712}
1713
1714void
1715tr_torrentVerify( tr_torrent * tor )
1716{
1717    if( tr_isTorrent( tor ) )
1718        tr_runInEventThread( tor->session, verifyTorrent, tor );
1719}
1720
1721void
1722tr_torrentSave( tr_torrent * tor )
1723{
1724    assert( tr_isTorrent( tor ) );
1725
1726    if( tor->isDirty )
1727    {
1728        tor->isDirty = FALSE;
1729        tr_torrentSaveResume( tor );
1730    }
1731}
1732
1733static void
1734stopTorrent( void * vtor )
1735{
1736    tr_torrent * tor = vtor;
1737    tr_torinf( tor, "Pausing" );
1738
1739    assert( tr_isTorrent( tor ) );
1740
1741    tr_torrentLock( tor );
1742
1743    tr_verifyRemove( tor );
1744    tr_peerMgrStopTorrent( tor );
1745    tr_announcerTorrentStopped( tor );
1746    tr_cacheFlushTorrent( tor->session->cache, tor );
1747
1748    tr_fdTorrentClose( tor->session, tor->uniqueId );
1749
1750    if( !tor->isDeleting )
1751        tr_torrentSave( tor );
1752
1753    tr_torrentUnlock( tor );
1754}
1755
1756void
1757tr_torrentStop( tr_torrent * tor )
1758{
1759    assert( tr_isTorrent( tor ) );
1760
1761    if( tr_isTorrent( tor ) )
1762    {
1763        tr_sessionLock( tor->session );
1764
1765        tor->isRunning = 0;
1766        tor->isStopping = 0;
1767        tr_torrentSetDirty( tor );
1768        tr_runInEventThread( tor->session, stopTorrent, tor );
1769
1770        tr_sessionUnlock( tor->session );
1771    }
1772}
1773
1774static void
1775closeTorrent( void * vtor )
1776{
1777    tr_benc * d;
1778    tr_torrent * tor = vtor;
1779
1780    assert( tr_isTorrent( tor ) );
1781
1782    d = tr_bencListAddDict( &tor->session->removedTorrents, 2 );
1783    tr_bencDictAddInt( d, "id", tor->uniqueId );
1784    tr_bencDictAddInt( d, "date", tr_time( ) );
1785
1786    tr_torinf( tor, "%s", _( "Removing torrent" ) );
1787
1788    stopTorrent( tor );
1789
1790    if( tor->isDeleting )
1791    {
1792        tr_metainfoRemoveSaved( tor->session, &tor->info );
1793        tr_torrentRemoveResume( tor );
1794    }
1795
1796    tor->isRunning = 0;
1797    freeTorrent( tor );
1798}
1799
1800void
1801tr_torrentFree( tr_torrent * tor )
1802{
1803    if( tr_isTorrent( tor ) )
1804    {
1805        tr_session * session = tor->session;
1806        assert( tr_isSession( session ) );
1807        tr_sessionLock( session );
1808
1809        tr_torrentClearCompletenessCallback( tor );
1810        tr_runInEventThread( session, closeTorrent, tor );
1811
1812        tr_sessionUnlock( session );
1813    }
1814}
1815
1816struct remove_data
1817{
1818    tr_torrent   * tor;
1819    tr_bool        deleteFlag;
1820    tr_fileFunc  * deleteFunc;
1821};
1822
1823static void tr_torrentDeleteLocalData( tr_torrent *, tr_fileFunc );
1824
1825static void
1826removeTorrent( void * vdata )
1827{
1828    struct remove_data * data = vdata;
1829
1830    if( data->deleteFlag )
1831        tr_torrentDeleteLocalData( data->tor, data->deleteFunc );
1832
1833    tr_torrentClearCompletenessCallback( data->tor );
1834    closeTorrent( data->tor );
1835    tr_free( data );
1836}
1837
1838void
1839tr_torrentRemove( tr_torrent   * tor,
1840                  tr_bool        deleteFlag, 
1841                  tr_fileFunc    deleteFunc )
1842{
1843    struct remove_data * data;
1844
1845    assert( tr_isTorrent( tor ) );
1846    tor->isDeleting = 1;
1847
1848    data = tr_new0( struct remove_data, 1 );
1849    data->tor = tor;
1850    data->deleteFlag = deleteFlag;
1851    data->deleteFunc = deleteFunc;
1852    tr_runInEventThread( tor->session, removeTorrent, data );
1853}
1854
1855/**
1856***  Completeness
1857**/
1858
1859static const char *
1860getCompletionString( int type )
1861{
1862    switch( type )
1863    {
1864        /* Translators: this is a minor point that's safe to skip over, but FYI:
1865           "Complete" and "Done" are specific, different terms in Transmission:
1866           "Complete" means we've downloaded every file in the torrent.
1867           "Done" means we're done downloading the files we wanted, but NOT all
1868           that exist */
1869        case TR_PARTIAL_SEED:
1870            return _( "Done" );
1871
1872        case TR_SEED:
1873            return _( "Complete" );
1874
1875        default:
1876            return _( "Incomplete" );
1877    }
1878}
1879
1880static void
1881fireCompletenessChange( tr_torrent       * tor,
1882                        tr_completeness    status,
1883                        tr_bool            wasRunning )
1884{
1885    assert( tr_isTorrent( tor ) );
1886    assert( ( status == TR_LEECH )
1887         || ( status == TR_SEED )
1888         || ( status == TR_PARTIAL_SEED ) );
1889
1890    if( tor->completeness_func )
1891        tor->completeness_func( tor, status, wasRunning,
1892                                tor->completeness_func_user_data );
1893}
1894
1895void
1896tr_torrentSetCompletenessCallback( tr_torrent                    * tor,
1897                                   tr_torrent_completeness_func    func,
1898                                   void                          * user_data )
1899{
1900    assert( tr_isTorrent( tor ) );
1901
1902    tor->completeness_func = func;
1903    tor->completeness_func_user_data = user_data;
1904}
1905
1906void
1907tr_torrentClearCompletenessCallback( tr_torrent * torrent )
1908{
1909    tr_torrentSetCompletenessCallback( torrent, NULL, NULL );
1910}
1911
1912void
1913tr_torrentSetRatioLimitHitCallback( tr_torrent                     * tor,
1914                                    tr_torrent_ratio_limit_hit_func  func,
1915                                    void                           * user_data )
1916{
1917    assert( tr_isTorrent( tor ) );
1918
1919    tor->ratio_limit_hit_func = func;
1920    tor->ratio_limit_hit_func_user_data = user_data;
1921}
1922
1923void
1924tr_torrentClearRatioLimitHitCallback( tr_torrent * torrent )
1925{
1926    tr_torrentSetRatioLimitHitCallback( torrent, NULL, NULL );
1927}
1928
1929void
1930tr_torrentSetIdleLimitHitCallback( tr_torrent                    * tor,
1931                                   tr_torrent_idle_limit_hit_func  func,
1932                                   void                          * user_data )
1933{
1934    assert( tr_isTorrent( tor ) );
1935
1936    tor->idle_limit_hit_func = func;
1937    tor->idle_limit_hit_func_user_data = user_data;
1938}
1939
1940void
1941tr_torrentClearIdleLimitHitCallback( tr_torrent * torrent )
1942{
1943    tr_torrentSetIdleLimitHitCallback( torrent, NULL, NULL );
1944}
1945
1946static void
1947onSigCHLD( int i UNUSED )
1948{
1949    waitpid( -1, NULL, WNOHANG );
1950}
1951
1952static void
1953torrentCallScript( const tr_torrent * tor, const char * script )
1954{
1955    char timeStr[128];
1956    const time_t now = tr_time( );
1957
1958    assert( tr_isTorrent( tor ) );
1959
1960    tr_strlcpy( timeStr, ctime( &now ), sizeof( timeStr ) );
1961    *strchr( timeStr,'\n' ) = '\0';
1962
1963    if( script && *script )
1964    {
1965        int i;
1966        char * cmd[] = { tr_strdup( script ), NULL };
1967        char * env[] = {
1968            tr_strdup_printf( "TR_APP_VERSION=%s", SHORT_VERSION_STRING ),
1969            tr_strdup_printf( "TR_TIME_LOCALTIME=%s", timeStr ),
1970            tr_strdup_printf( "TR_TORRENT_DIR=%s", tor->currentDir ),
1971            tr_strdup_printf( "TR_TORRENT_ID=%d", tr_torrentId( tor ) ),
1972            tr_strdup_printf( "TR_TORRENT_HASH=%s", tor->info.hashString ),
1973            tr_strdup_printf( "TR_TORRENT_NAME=%s", tr_torrentName( tor ) ),
1974            NULL };
1975
1976        tr_torinf( tor, "Calling script \"%s\"", script ); 
1977
1978#ifdef WIN32
1979        _spawnvpe( _P_NOWAIT, script, (const char*)cmd, env );
1980#else
1981        signal( SIGCHLD, onSigCHLD );
1982
1983        if( !fork( ) )
1984        {
1985            execve( script, cmd, env );
1986            _exit( 0 );
1987        }
1988#endif
1989
1990        for( i=0; cmd[i]; ++i ) tr_free( cmd[i] );
1991        for( i=0; env[i]; ++i ) tr_free( env[i] );
1992    }
1993}
1994
1995void
1996tr_torrentRecheckCompleteness( tr_torrent * tor )
1997{
1998    tr_completeness completeness;
1999
2000    assert( tr_isTorrent( tor ) );
2001
2002    tr_torrentLock( tor );
2003
2004    completeness = tr_cpGetStatus( &tor->completion );
2005
2006    if( completeness != tor->completeness )
2007    {
2008        const int recentChange = tor->downloadedCur != 0;
2009        const tr_bool wasLeeching = !tr_torrentIsSeed( tor );
2010        const tr_bool wasRunning = tor->isRunning;
2011
2012        if( recentChange )
2013        {
2014            tr_torinf( tor, _( "State changed from \"%1$s\" to \"%2$s\"" ),
2015                      getCompletionString( tor->completeness ),
2016                      getCompletionString( completeness ) );
2017        }
2018
2019        tor->completeness = completeness;
2020        tr_fdTorrentClose( tor->session, tor->uniqueId );
2021
2022        if( tr_torrentIsSeed( tor ) )
2023        {
2024            if( recentChange )
2025            {
2026                tr_announcerTorrentCompleted( tor );
2027                tor->doneDate = tor->anyDate = tr_time( );
2028            }
2029
2030            if( wasLeeching && wasRunning )
2031            {
2032                /* clear interested flag on all peers */
2033                tr_peerMgrClearInterest( tor );
2034
2035                /* if completeness was TR_LEECH then the seed limit check will have been skipped in bandwidthPulse */
2036                tr_torrentCheckSeedLimit( tor );
2037            }
2038
2039            if( tor->currentDir == tor->incompleteDir )
2040                tr_torrentSetLocation( tor, tor->downloadDir, TRUE, NULL, NULL );
2041
2042            if( tr_sessionIsTorrentDoneScriptEnabled( tor->session ) )
2043                torrentCallScript( tor, tr_sessionGetTorrentDoneScript( tor->session ) );
2044        }
2045
2046        fireCompletenessChange( tor, wasRunning, completeness );
2047
2048        tr_torrentSetDirty( tor );
2049    }
2050
2051    tr_torrentUnlock( tor );
2052}
2053
2054/***
2055****
2056***/
2057
2058static void
2059tr_torrentFireMetadataCompleted( tr_torrent * tor )
2060{
2061    assert( tr_isTorrent( tor ) );
2062
2063    if( tor->metadata_func )
2064        tor->metadata_func( tor, tor->metadata_func_user_data );
2065}
2066
2067void
2068tr_torrentSetMetadataCallback( tr_torrent                * tor,
2069                               tr_torrent_metadata_func    func,
2070                               void                      * user_data )
2071{
2072    assert( tr_isTorrent( tor ) );
2073
2074    tor->metadata_func = func;
2075    tor->metadata_func_user_data = user_data;
2076}
2077
2078
2079/**
2080***  File priorities
2081**/
2082
2083void
2084tr_torrentInitFilePriority( tr_torrent *    tor,
2085                            tr_file_index_t fileIndex,
2086                            tr_priority_t   priority )
2087{
2088    tr_piece_index_t i;
2089    tr_file *        file;
2090
2091    assert( tr_isTorrent( tor ) );
2092    assert( fileIndex < tor->info.fileCount );
2093    assert( tr_isPriority( priority ) );
2094
2095    file = &tor->info.files[fileIndex];
2096    file->priority = priority;
2097    for( i = file->firstPiece; i <= file->lastPiece; ++i )
2098        tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
2099}
2100
2101void
2102tr_torrentSetFilePriorities( tr_torrent             * tor,
2103                             const tr_file_index_t  * files,
2104                             tr_file_index_t          fileCount,
2105                             tr_priority_t            priority )
2106{
2107    tr_file_index_t i;
2108    assert( tr_isTorrent( tor ) );
2109    tr_torrentLock( tor );
2110
2111    for( i = 0; i < fileCount; ++i )
2112        if( files[i] < tor->info.fileCount )
2113            tr_torrentInitFilePriority( tor, files[i], priority );
2114    tr_torrentSetDirty( tor );
2115    tr_peerMgrRebuildRequests( tor );
2116
2117    tr_torrentUnlock( tor );
2118}
2119
2120tr_priority_t*
2121tr_torrentGetFilePriorities( const tr_torrent * tor )
2122{
2123    tr_file_index_t i;
2124    tr_priority_t * p;
2125
2126    assert( tr_isTorrent( tor ) );
2127
2128    tr_torrentLock( tor );
2129    p = tr_new0( tr_priority_t, tor->info.fileCount );
2130    for( i = 0; i < tor->info.fileCount; ++i )
2131        p[i] = tor->info.files[i].priority;
2132    tr_torrentUnlock( tor );
2133
2134    return p;
2135}
2136
2137/**
2138***  File DND
2139**/
2140
2141static void
2142setFileDND( tr_torrent * tor, tr_file_index_t fileIndex, int doDownload )
2143{
2144    tr_file *        file;
2145    const int8_t     dnd = !doDownload;
2146    tr_piece_index_t firstPiece;
2147    int8_t           firstPieceDND;
2148    tr_piece_index_t lastPiece;
2149    int8_t           lastPieceDND;
2150    tr_file_index_t  i;
2151
2152    assert( tr_isTorrent( tor ) );
2153
2154    file = &tor->info.files[fileIndex];
2155    file->dnd = dnd;
2156    firstPiece = file->firstPiece;
2157    lastPiece = file->lastPiece;
2158
2159    /* can't set the first piece to DND unless
2160       every file using that piece is DND */
2161    firstPieceDND = dnd;
2162    if( fileIndex > 0 )
2163    {
2164        for( i = fileIndex - 1; firstPieceDND; --i )
2165        {
2166            if( tor->info.files[i].lastPiece != firstPiece )
2167                break;
2168            firstPieceDND = tor->info.files[i].dnd;
2169            if( !i )
2170                break;
2171        }
2172    }
2173
2174    /* can't set the last piece to DND unless
2175       every file using that piece is DND */
2176    lastPieceDND = dnd;
2177    for( i = fileIndex + 1; lastPieceDND && i < tor->info.fileCount; ++i )
2178    {
2179        if( tor->info.files[i].firstPiece != lastPiece )
2180            break;
2181        lastPieceDND = tor->info.files[i].dnd;
2182    }
2183
2184    if( firstPiece == lastPiece )
2185    {
2186        tor->info.pieces[firstPiece].dnd = firstPieceDND && lastPieceDND;
2187    }
2188    else
2189    {
2190        tr_piece_index_t pp;
2191        tor->info.pieces[firstPiece].dnd = firstPieceDND;
2192        tor->info.pieces[lastPiece].dnd = lastPieceDND;
2193        for( pp = firstPiece + 1; pp < lastPiece; ++pp )
2194            tor->info.pieces[pp].dnd = dnd;
2195    }
2196}
2197
2198void
2199tr_torrentInitFileDLs( tr_torrent             * tor,
2200                       const tr_file_index_t  * files,
2201                       tr_file_index_t          fileCount,
2202                       tr_bool                  doDownload )
2203{
2204    tr_file_index_t i;
2205
2206    assert( tr_isTorrent( tor ) );
2207
2208    tr_torrentLock( tor );
2209
2210    for( i=0; i<fileCount; ++i )
2211        if( files[i] < tor->info.fileCount )
2212            setFileDND( tor, files[i], doDownload );
2213
2214    tr_cpInvalidateDND( &tor->completion );
2215
2216    tr_torrentUnlock( tor );
2217}
2218
2219void
2220tr_torrentSetFileDLs( tr_torrent             * tor,
2221                      const tr_file_index_t  * files,
2222                      tr_file_index_t          fileCount,
2223                      tr_bool                  doDownload )
2224{
2225    assert( tr_isTorrent( tor ) );
2226    tr_torrentLock( tor );
2227
2228    tr_torrentInitFileDLs( tor, files, fileCount, doDownload );
2229    tr_torrentSetDirty( tor );
2230    tr_peerMgrRebuildRequests( tor );
2231
2232    tr_torrentUnlock( tor );
2233}
2234
2235/***
2236****
2237***/
2238
2239tr_priority_t
2240tr_torrentGetPriority( const tr_torrent * tor )
2241{
2242    assert( tr_isTorrent( tor ) );
2243
2244    return tor->bandwidth->priority;
2245}
2246
2247void
2248tr_torrentSetPriority( tr_torrent * tor, tr_priority_t priority )
2249{
2250    assert( tr_isTorrent( tor ) );
2251    assert( tr_isPriority( priority ) );
2252
2253    if( tor->bandwidth->priority != priority )
2254    {
2255        tor->bandwidth->priority = priority;
2256
2257        tr_torrentSetDirty( tor );
2258    }
2259}
2260
2261/***
2262****
2263***/
2264
2265void
2266tr_torrentSetPeerLimit( tr_torrent * tor,
2267                        uint16_t     maxConnectedPeers )
2268{
2269    assert( tr_isTorrent( tor ) );
2270
2271    if ( tor->maxConnectedPeers != maxConnectedPeers )
2272    {
2273        tor->maxConnectedPeers = maxConnectedPeers;
2274
2275        tr_torrentSetDirty( tor );
2276    }
2277}
2278
2279uint16_t
2280tr_torrentGetPeerLimit( const tr_torrent * tor )
2281{
2282    assert( tr_isTorrent( tor ) );
2283
2284    return tor->maxConnectedPeers;
2285}
2286
2287/***
2288****
2289***/
2290
2291tr_block_index_t
2292_tr_block( const tr_torrent * tor,
2293           tr_piece_index_t   index,
2294           uint32_t           offset )
2295{
2296    tr_block_index_t ret;
2297
2298    assert( tr_isTorrent( tor ) );
2299
2300    ret = index;
2301    ret *= ( tor->info.pieceSize / tor->blockSize );
2302    ret += offset / tor->blockSize;
2303    return ret;
2304}
2305
2306tr_bool
2307tr_torrentReqIsValid( const tr_torrent * tor,
2308                      tr_piece_index_t   index,
2309                      uint32_t           offset,
2310                      uint32_t           length )
2311{
2312    int err = 0;
2313
2314    assert( tr_isTorrent( tor ) );
2315
2316    if( index >= tor->info.pieceCount )
2317        err = 1;
2318    else if( length < 1 )
2319        err = 2;
2320    else if( ( offset + length ) > tr_torPieceCountBytes( tor, index ) )
2321        err = 3;
2322    else if( length > MAX_BLOCK_SIZE )
2323        err = 4;
2324    else if( tr_pieceOffset( tor, index, offset, length ) > tor->info.totalSize )
2325        err = 5;
2326
2327    if( err ) tr_tordbg( tor, "index %lu offset %lu length %lu err %d\n",
2328                              (unsigned long)index,
2329                              (unsigned long)offset,
2330                              (unsigned long)length,
2331                              err );
2332
2333    return !err;
2334}
2335
2336uint64_t
2337tr_pieceOffset( const tr_torrent * tor,
2338                tr_piece_index_t   index,
2339                uint32_t           offset,
2340                uint32_t           length )
2341{
2342    uint64_t ret;
2343
2344    assert( tr_isTorrent( tor ) );
2345
2346    ret = tor->info.pieceSize;
2347    ret *= index;
2348    ret += offset;
2349    ret += length;
2350    return ret;
2351}
2352
2353/***
2354****
2355***/
2356
2357void
2358tr_torrentSetPieceChecked( tr_torrent * tor, tr_piece_index_t pieceIndex )
2359{
2360    assert( tr_isTorrent( tor ) );
2361    assert( pieceIndex < tor->info.pieceCount );
2362
2363    tor->info.pieces[pieceIndex].timeChecked = tr_time( );
2364}
2365
2366void
2367tr_torrentSetChecked( tr_torrent * tor, time_t when )
2368{
2369    tr_piece_index_t i, n;
2370
2371    assert( tr_isTorrent( tor ) );
2372
2373    for( i=0, n=tor->info.pieceCount; i!=n; ++i )
2374        tor->info.pieces[i].timeChecked = when;
2375}
2376
2377tr_bool
2378tr_torrentCheckPiece( tr_torrent * tor, tr_piece_index_t pieceIndex )
2379{
2380    const tr_bool pass = tr_ioTestPiece( tor, pieceIndex );
2381
2382    tr_deeplog_tor( tor, "[LAZY] tr_torrentCheckPiece tested piece %zu, pass==%d", (size_t)pieceIndex, (int)pass );
2383    tr_torrentSetHasPiece( tor, pieceIndex, pass );
2384    tr_torrentSetPieceChecked( tor, pieceIndex );
2385    tor->anyDate = tr_time( );
2386    tr_torrentSetDirty( tor );
2387
2388    return pass;
2389}
2390
2391time_t
2392tr_torrentGetFileMTime( const tr_torrent * tor, tr_file_index_t i )
2393{
2394    struct stat sb;
2395    time_t mtime = 0;
2396    char * path = tr_torrentFindFile( tor, i );
2397
2398    if( ( path != NULL ) && !stat( path, &sb ) && S_ISREG( sb.st_mode ) )
2399    {
2400#ifdef SYS_DARWIN
2401        mtime = sb.st_mtimespec.tv_sec;
2402#else
2403        mtime = sb.st_mtime;
2404#endif
2405    }
2406
2407    tr_free( path );
2408    return mtime;
2409}
2410
2411tr_bool
2412tr_torrentPieceNeedsCheck( const tr_torrent * tor, tr_piece_index_t p )
2413{
2414    uint64_t unused;
2415    tr_file_index_t f;
2416    const tr_info * inf = tr_torrentInfo( tor );
2417
2418    /* if we've never checked this piece, then it needs to be checked */
2419    if( !inf->pieces[p].timeChecked )
2420        return TRUE;
2421
2422    /* If we think we've completed one of the files in this piece,
2423     * but it's been modified since we last checked it,
2424     * then it needs to be rechecked */
2425    tr_ioFindFileLocation( tor, p, 0, &f, &unused );
2426    for( ; f < inf->fileCount && pieceHasFile( p, &inf->files[f] ); ++f )
2427        if( tr_cpFileIsComplete( &tor->completion, f ) )
2428            if( tr_torrentGetFileMTime( tor, f ) > inf->pieces[p].timeChecked )
2429                return TRUE;
2430
2431    return FALSE;
2432}
2433
2434/***
2435****
2436***/
2437
2438static int
2439compareTrackerByTier( const void * va, const void * vb )
2440{
2441    const tr_tracker_info * a = va;
2442    const tr_tracker_info * b = vb;
2443
2444    /* sort by tier */
2445    if( a->tier != b->tier )
2446        return a->tier - b->tier;
2447
2448    /* get the effects of a stable sort by comparing the two elements' addresses */
2449    return a - b;
2450}
2451
2452tr_bool
2453tr_torrentSetAnnounceList( tr_torrent             * tor,
2454                           const tr_tracker_info  * trackers_in,
2455                           int                      trackerCount )
2456{
2457    int i;
2458    tr_benc metainfo;
2459    tr_bool ok = TRUE;
2460    tr_tracker_info * trackers;
2461
2462    tr_torrentLock( tor );
2463
2464    assert( tr_isTorrent( tor ) );
2465
2466    /* ensure the trackers' tiers are in ascending order */
2467    trackers = tr_memdup( trackers_in, sizeof( tr_tracker_info ) * trackerCount );
2468    qsort( trackers, trackerCount, sizeof( tr_tracker_info ), compareTrackerByTier );
2469
2470    /* look for bad URLs */
2471    for( i=0; ok && i<trackerCount; ++i )
2472        if( !tr_urlIsValidTracker( trackers[i].announce ) )
2473            ok = FALSE;
2474
2475    /* save to the .torrent file */
2476    if( ok && !tr_bencLoadFile( &metainfo, TR_FMT_BENC, tor->info.torrent ) )
2477    {
2478        tr_bool hasInfo;
2479        tr_info tmpInfo;
2480
2481        /* remove the old fields */
2482        tr_bencDictRemove( &metainfo, "announce" );
2483        tr_bencDictRemove( &metainfo, "announce-list" );
2484
2485        /* add the new fields */
2486        if( trackerCount > 0 )
2487        {
2488            tr_bencDictAddStr( &metainfo, "announce", trackers[0].announce );
2489        }
2490        if( trackerCount > 1 )
2491        {
2492            int i;
2493            int prevTier = -1;
2494            tr_benc * tier = NULL;
2495            tr_benc * announceList = tr_bencDictAddList( &metainfo, "announce-list", 0 );
2496
2497            for( i=0; i<trackerCount; ++i ) {
2498                if( prevTier != trackers[i].tier ) {
2499                    prevTier = trackers[i].tier;
2500                    tier = tr_bencListAddList( announceList, 0 );
2501                }
2502                tr_bencListAddStr( tier, trackers[i].announce );
2503            }
2504        }
2505
2506        /* try to parse it back again, to make sure it's good */
2507        memset( &tmpInfo, 0, sizeof( tr_info ) );
2508        if( tr_metainfoParse( tor->session, &metainfo, &tmpInfo,
2509                              &hasInfo, &tor->infoDictLength ) )
2510        {
2511            /* it's good, so keep these new trackers and free the old ones */
2512
2513            tr_info swap;
2514            swap.trackers = tor->info.trackers;
2515            swap.trackerCount = tor->info.trackerCount;
2516            tor->info.trackers = tmpInfo.trackers;
2517            tor->info.trackerCount = tmpInfo.trackerCount;
2518            tmpInfo.trackers = swap.trackers;
2519            tmpInfo.trackerCount = swap.trackerCount;
2520
2521            tr_metainfoFree( &tmpInfo );
2522            tr_bencToFile( &metainfo, TR_FMT_BENC, tor->info.torrent );
2523        }
2524
2525        /* cleanup */
2526        tr_bencFree( &metainfo );
2527
2528        /* if we had a tracker-related error on this torrent,
2529         * and that tracker's been removed,
2530         * then clear the error */
2531        if(    ( tor->error == TR_STAT_TRACKER_WARNING )
2532            || ( tor->error == TR_STAT_TRACKER_ERROR ) )
2533        {
2534            tr_bool clear = TRUE;
2535
2536            for( i=0; clear && i<trackerCount; ++i )
2537                if( !strcmp( trackers[i].announce, tor->errorTracker ) )
2538                    clear = FALSE;
2539
2540            if( clear )
2541                tr_torrentClearError( tor );
2542        }
2543
2544        /* tell the announcer to reload this torrent's tracker list */
2545        tr_announcerResetTorrent( tor->session->announcer, tor );
2546    }
2547
2548    tr_torrentUnlock( tor );
2549
2550    tr_free( trackers );
2551    return ok;
2552}
2553
2554/**
2555***
2556**/
2557
2558void
2559tr_torrentSetAddedDate( tr_torrent * tor,
2560                        time_t       t )
2561{
2562    assert( tr_isTorrent( tor ) );
2563
2564    tor->addedDate = t;
2565    tor->anyDate = MAX( tor->anyDate, tor->addedDate );
2566}
2567
2568void
2569tr_torrentSetActivityDate( tr_torrent * tor, time_t t )
2570{
2571    assert( tr_isTorrent( tor ) );
2572
2573    tor->activityDate = t;
2574    tor->anyDate = MAX( tor->anyDate, tor->activityDate );
2575}
2576
2577void
2578tr_torrentSetDoneDate( tr_torrent * tor,
2579                       time_t       t )
2580{
2581    assert( tr_isTorrent( tor ) );
2582
2583    tor->doneDate = t;
2584    tor->anyDate = MAX( tor->anyDate, tor->doneDate );
2585}
2586
2587/**
2588***
2589**/
2590
2591uint64_t
2592tr_torrentGetBytesLeftToAllocate( const tr_torrent * tor )
2593{
2594    tr_file_index_t i;
2595    uint64_t bytesLeft = 0;
2596
2597    assert( tr_isTorrent( tor ) );
2598
2599    for( i=0; i<tor->info.fileCount; ++i )
2600    {
2601        if( !tor->info.files[i].dnd )
2602        {
2603            struct stat sb;
2604            const uint64_t length = tor->info.files[i].length;
2605            char * path = tr_torrentFindFile( tor, i );
2606
2607            bytesLeft += length;
2608
2609            if( ( path != NULL ) && !stat( path, &sb )
2610                                 && S_ISREG( sb.st_mode )
2611                                 && ( (uint64_t)sb.st_size <= length ) )
2612                bytesLeft -= sb.st_size;
2613
2614            tr_free( path );
2615        }
2616    }
2617
2618    return bytesLeft;
2619}
2620
2621/****
2622*****  Removing the torrent's local data
2623****/
2624
2625static int
2626vstrcmp( const void * a, const void * b )
2627{
2628    return strcmp( a, b );
2629}
2630
2631static int
2632compareLongestFirst( const void * a, const void * b )
2633{
2634    const size_t alen = strlen( a );
2635    const size_t blen = strlen( b );
2636
2637    if( alen != blen )
2638        return alen > blen ? -1 : 1;
2639
2640    return vstrcmp( a, b );
2641}
2642
2643static void
2644addDirtyFile( const char  * root,
2645              const char  * filename,
2646              tr_ptrArray * dirtyFolders )
2647{
2648    char * dir = tr_dirname( filename );
2649
2650    /* add the parent folders to dirtyFolders until we reach the root or a known-dirty */
2651    while (     ( dir != NULL )
2652             && ( strlen( root ) <= strlen( dir ) )
2653             && ( tr_ptrArrayFindSorted( dirtyFolders, dir, vstrcmp ) == NULL ) )
2654    {
2655        char * tmp;
2656        tr_ptrArrayInsertSorted( dirtyFolders, tr_strdup( dir ), vstrcmp );
2657
2658        tmp = tr_dirname( dir );
2659        tr_free( dir );
2660        dir = tmp;
2661    }
2662
2663    tr_free( dir );
2664}
2665
2666static void
2667walkLocalData( const tr_torrent * tor,
2668               const char       * root,
2669               const char       * dir,
2670               const char       * base,
2671               tr_ptrArray      * torrentFiles,
2672               tr_ptrArray      * folders,
2673               tr_ptrArray      * dirtyFolders )
2674{
2675    int i;
2676    struct stat sb;
2677    char * buf;
2678
2679    assert( tr_isTorrent( tor ) );
2680
2681    buf = tr_buildPath( dir, base, NULL );
2682    i = stat( buf, &sb );
2683    if( !i )
2684    {
2685        DIR * odir = NULL;
2686
2687        if( S_ISDIR( sb.st_mode ) && ( ( odir = opendir ( buf ) ) ) )
2688        {
2689            struct dirent *d;
2690            tr_ptrArrayInsertSorted( folders, tr_strdup( buf ), vstrcmp );
2691            for( d = readdir( odir ); d != NULL; d = readdir( odir ) )
2692                if( d->d_name && strcmp( d->d_name, "." ) && strcmp( d->d_name, ".." ) )
2693                    walkLocalData( tor, root, buf, d->d_name, torrentFiles, folders, dirtyFolders );
2694            closedir( odir );
2695        }
2696        else if( S_ISREG( sb.st_mode ) && ( sb.st_size > 0 ) )
2697        {
2698            const char * sub = buf + strlen( tor->currentDir ) + strlen( TR_PATH_DELIMITER_STR );
2699            const tr_bool isTorrentFile = tr_ptrArrayFindSorted( torrentFiles, sub, vstrcmp ) != NULL;
2700            if( !isTorrentFile )
2701                addDirtyFile( root, buf, dirtyFolders );
2702        }
2703    }
2704
2705    tr_free( buf );
2706}
2707
2708static void
2709deleteLocalFile( const char * filename, tr_fileFunc fileFunc )
2710{
2711    struct stat sb;
2712    if( !stat( filename, &sb ) ) /* if file exists... */
2713        fileFunc( filename );
2714}
2715
2716static void
2717deleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2718{
2719    int i, n;
2720    char ** s;
2721    tr_file_index_t f;
2722    tr_ptrArray torrentFiles = TR_PTR_ARRAY_INIT;
2723    tr_ptrArray folders      = TR_PTR_ARRAY_INIT;
2724    tr_ptrArray dirtyFolders = TR_PTR_ARRAY_INIT; /* dirty == contains non-torrent files */
2725
2726    const char * firstFile = tor->info.files[0].name;
2727    const char * cpch = strchr( firstFile, TR_PATH_DELIMITER );
2728    char * tmp = cpch ? tr_strndup( firstFile, cpch - firstFile ) : NULL;
2729    char * root = tr_buildPath( tor->currentDir, tmp, NULL );
2730
2731    assert( tr_isTorrent( tor ) );
2732
2733    for( f=0; f<tor->info.fileCount; ++f ) {
2734        tr_ptrArrayInsertSorted( &torrentFiles, tr_strdup( tor->info.files[f].name ), vstrcmp );
2735        tr_ptrArrayInsertSorted( &torrentFiles, tr_torrentBuildPartial( tor, f ), vstrcmp );
2736    }
2737
2738    /* build the set of folders and dirtyFolders */
2739    walkLocalData( tor, root, root, NULL, &torrentFiles, &folders, &dirtyFolders );
2740
2741    /* try to remove entire folders first, so that the recycle bin will be tidy */
2742    s = (char**) tr_ptrArrayPeek( &folders, &n );
2743    for( i=0; i<n; ++i )
2744        if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2745            deleteLocalFile( s[i], fileFunc );
2746
2747    /* now blow away any remaining torrent files, such as torrent files in dirty folders */
2748    for( i=0, n=tr_ptrArraySize( &torrentFiles ); i<n; ++i ) {
2749        char * path = tr_buildPath( tor->currentDir, tr_ptrArrayNth( &torrentFiles, i ), NULL );
2750        deleteLocalFile( path, fileFunc );
2751        tr_free( path );
2752    }
2753
2754    /* Now clean out the directories left empty from the previous step.
2755     * Work from deepest to shallowest s.t. lower folders
2756     * won't prevent the upper folders from being deleted */
2757    {
2758        tr_ptrArray cleanFolders = TR_PTR_ARRAY_INIT;
2759        s = (char**) tr_ptrArrayPeek( &folders, &n );
2760        for( i=0; i<n; ++i )
2761            if( tr_ptrArrayFindSorted( &dirtyFolders, s[i], vstrcmp ) == NULL )
2762                tr_ptrArrayInsertSorted( &cleanFolders, s[i], compareLongestFirst );
2763        s = (char**) tr_ptrArrayPeek( &cleanFolders, &n );
2764        for( i=0; i<n; ++i ) {
2765#ifdef SYS_DARWIN
2766            char * dsStore = tr_buildPath( s[i], ".DS_Store", NULL );
2767            deleteLocalFile( dsStore, fileFunc );
2768            tr_free( dsStore );
2769#endif
2770            deleteLocalFile( s[i], fileFunc );
2771        }
2772        tr_ptrArrayDestruct( &cleanFolders, NULL );
2773    }
2774
2775    /* cleanup */
2776    tr_ptrArrayDestruct( &dirtyFolders, tr_free );
2777    tr_ptrArrayDestruct( &folders, tr_free );
2778    tr_ptrArrayDestruct( &torrentFiles, tr_free );
2779    tr_free( root );
2780    tr_free( tmp );
2781}
2782
2783static void
2784tr_torrentDeleteLocalData( tr_torrent * tor, tr_fileFunc fileFunc )
2785{
2786    assert( tr_isTorrent( tor ) );
2787
2788    if( fileFunc == NULL )
2789        fileFunc = remove;
2790
2791    /* close all the files because we're about to delete them */
2792    tr_cacheFlushTorrent( tor->session->cache, tor );
2793    tr_fdTorrentClose( tor->session, tor->uniqueId );
2794
2795    if( tor->info.fileCount > 1 )
2796    {
2797        deleteLocalData( tor, fileFunc );
2798    }
2799    else if( tor->info.fileCount == 1 )
2800    {
2801        char * tmp;
2802
2803        /* torrent only has one file */
2804        char * path = tr_buildPath( tor->currentDir, tor->info.files[0].name, NULL );
2805        deleteLocalFile( path, fileFunc );
2806        tr_free( path );
2807
2808        tmp = tr_torrentBuildPartial( tor, 0 );
2809        path = tr_buildPath( tor->currentDir, tmp, NULL );
2810        deleteLocalFile( path, fileFunc );
2811        tr_free( path );
2812        tr_free( tmp );
2813    }
2814}
2815
2816/***
2817****
2818***/
2819
2820struct LocationData
2821{
2822    tr_bool move_from_old_location;
2823    int * setme_state;
2824    double * setme_progress;
2825    char * location;
2826    tr_torrent * tor;
2827};
2828
2829static void
2830setLocation( void * vdata )
2831{
2832    tr_bool err = FALSE;
2833    struct LocationData * data = vdata;
2834    tr_torrent * tor = data->tor;
2835    const tr_bool do_move = data->move_from_old_location;
2836    const char * location = data->location;
2837    double bytesHandled = 0;
2838
2839    assert( tr_isTorrent( tor ) );
2840
2841    tr_dbg( "Moving \"%s\" location from currentDir \"%s\" to \"%s\"",
2842            tr_torrentName(tor), tor->currentDir, location );
2843
2844    tr_mkdirp( location, 0777 );
2845
2846    if( !tr_is_same_file( location, tor->currentDir ) )
2847    {
2848        tr_file_index_t i;
2849
2850        /* bad idea to move files while they're being verified... */
2851        tr_verifyRemove( tor );
2852
2853        /* try to move the files.
2854         * FIXME: there are still all kinds of nasty cases, like what
2855         * if the target directory runs out of space halfway through... */
2856        for( i=0; !err && i<tor->info.fileCount; ++i )
2857        {
2858            const tr_file * f = &tor->info.files[i];
2859            const char * oldbase;
2860            char * sub;
2861            if( tr_torrentFindFile2( tor, i, &oldbase, &sub ) )
2862            {
2863                char * oldpath = tr_buildPath( oldbase, sub, NULL );
2864                char * newpath = tr_buildPath( location, sub, NULL );
2865
2866                tr_dbg( "Found file #%d: %s", (int)i, oldpath );
2867
2868                if( do_move && !tr_is_same_file( oldpath, newpath ) )
2869                {
2870                    tr_bool renamed = FALSE;
2871                    errno = 0;
2872                    tr_torinf( tor, "moving \"%s\" to \"%s\"", oldpath, newpath );
2873                    if( tr_moveFile( oldpath, newpath, &renamed ) )
2874                    {
2875                        err = TRUE;
2876                        tr_torerr( tor, "error moving \"%s\" to \"%s\": %s",
2877                                        oldpath, newpath, tr_strerror( errno ) );
2878                    }
2879                }
2880
2881                tr_free( newpath );
2882                tr_free( oldpath );
2883                tr_free( sub );
2884            }
2885
2886            if( data->setme_progress )
2887            {
2888                bytesHandled += f->length;
2889                *data->setme_progress = bytesHandled / tor->info.totalSize;
2890            }
2891        }
2892
2893        if( !err )
2894        {
2895            /* blow away the leftover subdirectories in the old location */
2896            if( do_move )
2897                tr_torrentDeleteLocalData( tor, remove );
2898
2899            /* set the new location and reverify */
2900            tr_torrentSetDownloadDir( tor, location );
2901        }
2902    }
2903
2904    if( !err && do_move )
2905    {
2906        tr_free( tor->incompleteDir );
2907        tor->incompleteDir = NULL;
2908        tor->currentDir = tor->downloadDir;
2909    }
2910
2911    if( data->setme_state )
2912        *data->setme_state = err ? TR_LOC_ERROR : TR_LOC_DONE;
2913
2914    /* cleanup */
2915    tr_free( data->location );
2916    tr_free( data );
2917}
2918
2919void
2920tr_torrentSetLocation( tr_torrent  * tor,
2921                       const char  * location,
2922                       tr_bool       move_from_old_location,
2923                       double      * setme_progress,
2924                       int         * setme_state )
2925{
2926    struct LocationData * data;
2927
2928    assert( tr_isTorrent( tor ) );
2929
2930    if( setme_state )
2931        *setme_state = TR_LOC_MOVING;
2932    if( setme_progress )
2933        *setme_progress = 0;
2934
2935    /* run this in the libtransmission thread */
2936    data = tr_new( struct LocationData, 1 );
2937    data->tor = tor;
2938    data->location = tr_strdup( location );
2939    data->move_from_old_location = move_from_old_location;
2940    data->setme_state = setme_state;
2941    data->setme_progress = setme_progress;
2942    tr_runInEventThread( tor->session, setLocation, data );
2943}
2944
2945/***
2946****
2947***/
2948
2949void
2950tr_torrentFileCompleted( tr_torrent * tor, tr_file_index_t fileNum )
2951{
2952    char * sub;
2953    const char * base;
2954    const tr_info * inf = &tor->info;
2955    const tr_file * f = &inf->files[fileNum];
2956    tr_piece * p;
2957    const tr_piece * pend;
2958    const time_t now = tr_time( );
2959
2960    /* close the file so that we can reopen in read-only mode as needed */
2961    tr_fdFileClose( tor->session, tor, fileNum );
2962
2963    /* now that the file is complete and closed, we can start watching its
2964     * mtime timestamp for changes to know if we need to reverify pieces */
2965    for( p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p )
2966        p->timeChecked = now;
2967
2968    /* if the torrent's current filename isn't the same as the one in the
2969     * metadata -- for example, if it had the ".part" suffix appended to
2970     * it until now -- then rename it to match the one in the metadata */
2971    if( tr_torrentFindFile2( tor, fileNum, &base, &sub ) )
2972    {
2973        if( strcmp( sub, f->name ) )
2974        {
2975            char * oldpath = tr_buildPath( base, sub, NULL );
2976            char * newpath = tr_buildPath( base, f->name, NULL );
2977
2978            if( rename( oldpath, newpath ) )
2979                tr_torerr( tor, "Error moving \"%s\" to \"%s\": %s", oldpath, newpath, tr_strerror( errno ) );
2980
2981            tr_free( newpath );
2982            tr_free( oldpath );
2983        }
2984
2985        tr_free( sub );
2986    }
2987}
2988
2989/***
2990****
2991***/
2992
2993static tr_bool
2994fileExists( const char * filename )
2995{
2996    struct stat sb;
2997    const tr_bool ok = !stat( filename, &sb );
2998    return ok;
2999}
3000
3001tr_bool
3002tr_torrentFindFile2( const tr_torrent * tor, tr_file_index_t fileNum,
3003                     const char ** base, char ** subpath )
3004{
3005    char * part;
3006    const tr_file * file;
3007    const char * b = NULL;
3008    const char * s = NULL;
3009
3010    assert( tr_isTorrent( tor ) );
3011    assert( fileNum < tor->info.fileCount );
3012
3013    file = &tor->info.files[fileNum];
3014    part = tr_torrentBuildPartial( tor, fileNum );
3015
3016    if( b == NULL ) {
3017        char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
3018        if( fileExists( filename ) ) {
3019            b = tor->downloadDir;
3020            s = file->name;
3021        }
3022        tr_free( filename );
3023    }
3024
3025    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3026        char * filename = tr_buildPath( tor->incompleteDir, file->name, NULL );
3027        if( fileExists( filename ) ) {
3028            b = tor->incompleteDir;
3029            s = file->name;
3030        }
3031        tr_free( filename );
3032    }
3033
3034    if( ( b == NULL ) && ( tor->incompleteDir != NULL ) ) {
3035        char * filename = tr_buildPath( tor->incompleteDir, part, NULL );
3036        if( fileExists( filename ) ) {
3037            b = tor->incompleteDir;
3038            s = part;
3039        }
3040        tr_free( filename );
3041    }
3042
3043    if( b == NULL) {
3044        char * filename = tr_buildPath( tor->downloadDir, part, NULL );
3045        if( fileExists( filename ) ) {
3046            b = tor->downloadDir;
3047            s = part;
3048        }
3049        tr_free( filename );
3050    }
3051
3052    if( base != NULL )
3053        *base = b;
3054    if( subpath != NULL )
3055        *subpath = tr_strdup( s );
3056
3057    tr_free( part );
3058    return b != NULL;
3059}
3060
3061char*
3062tr_torrentFindFile( const tr_torrent * tor, tr_file_index_t fileNum )
3063{
3064    char * subpath;
3065    char * ret = NULL;
3066    const char * base;
3067
3068    if( tr_torrentFindFile2( tor, fileNum, &base, &subpath ) )
3069    {
3070        ret = tr_buildPath( base, subpath, NULL );
3071        tr_free( subpath );
3072    }
3073
3074    return ret;
3075}
3076
3077/* Decide whether we should be looking for files in downloadDir or incompleteDir. */
3078static void
3079refreshCurrentDir( tr_torrent * tor )
3080{
3081    const char * dir = NULL;
3082
3083    if( tor->incompleteDir == NULL )
3084        dir = tor->downloadDir;
3085    else if( !tr_torrentHasMetadata( tor ) ) /* no files to find */
3086        dir = tor->incompleteDir;
3087    else if( !tr_torrentFindFile2( tor, 0, &dir, NULL ) )
3088        dir = tor->incompleteDir;
3089
3090    assert( dir != NULL );
3091    assert( ( dir == tor->downloadDir ) || ( dir == tor->incompleteDir ) );
3092    tor->currentDir = dir;
3093}
3094
3095char*
3096tr_torrentBuildPartial( const tr_torrent * tor, tr_file_index_t fileNum )
3097{
3098    return tr_strdup_printf( "%s.part", tor->info.files[fileNum].name );
3099}
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