791 lines
18 KiB
C
791 lines
18 KiB
C
/*
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* This file Copyright (C) 2008 Charles Kerr <charles@rebelbase.com>
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#ifdef __BEOS__
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#include <signal.h>
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#include <fs_info.h>
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#include <FindDirectory.h>
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#include <kernel/OS.h>
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#define BEOS_MAX_THREADS 256
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#elif defined( WIN32 )
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#include <windows.h>
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#include <shlobj.h> /* for CSIDL_APPDATA, CSIDL_MYDOCUMENTS */
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#else
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#ifdef SYS_DARWIN
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#include <CoreFoundation/CoreFoundation.h>
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#endif
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#define _XOPEN_SOURCE 500 /* needed for recursive locks. */
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#ifndef __USE_UNIX98
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#define __USE_UNIX98 /* some older Linuxes need it spelt out for them */
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#endif
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#include <pthread.h>
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#endif
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#ifdef WIN32
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#include <libgen.h>
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#endif
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#include <dirent.h>
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#include <fcntl.h>
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#include <unistd.h> /* getuid getpid close */
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#include "transmission.h"
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#include "list.h"
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#include "platform.h"
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#include "utils.h"
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/***
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**** THREADS
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***/
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#ifdef __BEOS__
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typedef thread_id tr_thread_id;
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#elif defined( WIN32 )
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typedef DWORD tr_thread_id;
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#else
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typedef pthread_t tr_thread_id;
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#endif
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static tr_thread_id
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tr_getCurrentThread( void )
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{
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#ifdef __BEOS__
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return find_thread( NULL );
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#elif defined( WIN32 )
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return GetCurrentThreadId( );
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#else
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return pthread_self( );
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#endif
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}
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static int
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tr_areThreadsEqual( tr_thread_id a,
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tr_thread_id b )
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{
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#ifdef __BEOS__
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return a == b;
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#elif defined( WIN32 )
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return a == b;
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#else
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return pthread_equal( a, b );
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#endif
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}
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struct tr_thread
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{
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void ( * func )( void * );
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void * arg;
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tr_thread_id thread;
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#ifdef WIN32
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HANDLE thread_handle;
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#endif
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};
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int
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tr_amInThread( const tr_thread * t )
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{
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return tr_areThreadsEqual( tr_getCurrentThread( ), t->thread );
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}
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#ifdef WIN32
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#define ThreadFuncReturnType unsigned WINAPI
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#else
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#define ThreadFuncReturnType void
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#endif
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static ThreadFuncReturnType
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ThreadFunc( void * _t )
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{
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tr_thread * t = _t;
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#ifdef __BEOS__
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/* This is required because on BeOS, SIGINT is sent to each thread,
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which kills them not nicely */
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signal( SIGINT, SIG_IGN );
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#endif
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t->func( t->arg );
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#ifdef WIN32
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_endthreadex( 0 );
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return 0;
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#endif
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}
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tr_thread *
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tr_threadNew( void ( *func )(void *),
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void * arg )
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{
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tr_thread * t = tr_new0( tr_thread, 1 );
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t->func = func;
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t->arg = arg;
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#ifdef __BEOS__
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t->thread =
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spawn_thread( (void*)ThreadFunc, "beos thread", B_NORMAL_PRIORITY,
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t );
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resume_thread( t->thread );
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#elif defined( WIN32 )
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{
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unsigned int id;
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t->thread_handle =
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(HANDLE) _beginthreadex( NULL, 0, &ThreadFunc, t, 0,
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&id );
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t->thread = (DWORD) id;
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}
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#else
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pthread_create( &t->thread, NULL, ( void * ( * )(
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void * ) )ThreadFunc, t );
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#endif
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return t;
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}
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/***
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**** LOCKS
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***/
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struct tr_lock
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{
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int depth;
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#ifdef __BEOS__
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sem_id lock;
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thread_id lockThread;
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#elif defined( WIN32 )
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CRITICAL_SECTION lock;
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DWORD lockThread;
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#else
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pthread_mutex_t lock;
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pthread_t lockThread;
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#endif
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};
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tr_lock*
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tr_lockNew( void )
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{
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tr_lock * l = tr_new0( tr_lock, 1 );
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#ifdef __BEOS__
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l->lock = create_sem( 1, "" );
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#elif defined( WIN32 )
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InitializeCriticalSection( &l->lock ); /* supports recursion */
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#else
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pthread_mutexattr_t attr;
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pthread_mutexattr_init( &attr );
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pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
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pthread_mutex_init( &l->lock, &attr );
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#endif
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return l;
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}
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void
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tr_lockFree( tr_lock * l )
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{
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#ifdef __BEOS__
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delete_sem( l->lock );
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#elif defined( WIN32 )
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DeleteCriticalSection( &l->lock );
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#else
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pthread_mutex_destroy( &l->lock );
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#endif
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tr_free( l );
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}
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void
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tr_lockLock( tr_lock * l )
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{
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#ifdef __BEOS__
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acquire_sem( l->lock );
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#elif defined( WIN32 )
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EnterCriticalSection( &l->lock );
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#else
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pthread_mutex_lock( &l->lock );
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#endif
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assert( l->depth >= 0 );
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if( l->depth )
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assert( tr_areThreadsEqual( l->lockThread, tr_getCurrentThread( ) ) );
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l->lockThread = tr_getCurrentThread( );
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++l->depth;
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}
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int
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tr_lockHave( const tr_lock * l )
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{
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return ( l->depth > 0 )
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&& ( tr_areThreadsEqual( l->lockThread, tr_getCurrentThread( ) ) );
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}
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void
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tr_lockUnlock( tr_lock * l )
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{
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assert( l->depth > 0 );
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assert( tr_areThreadsEqual( l->lockThread, tr_getCurrentThread( ) ) );
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--l->depth;
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assert( l->depth >= 0 );
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#ifdef __BEOS__
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release_sem( l->lock );
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#elif defined( WIN32 )
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LeaveCriticalSection( &l->lock );
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#else
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pthread_mutex_unlock( &l->lock );
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#endif
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}
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/***
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**** PATHS
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***/
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#if !defined( WIN32 ) && !defined( __BEOS__ ) && !defined( __AMIGAOS4__ )
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#include <pwd.h>
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#endif
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static const char *
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getHomeDir( void )
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{
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static char * home = NULL;
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if( !home )
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{
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home = tr_strdup( getenv( "HOME" ) );
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if( !home )
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{
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#ifdef WIN32
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SHGetFolderPath( NULL, CSIDL_MYDOCUMENTS, NULL, 0, home );
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#elif defined( __BEOS__ ) || defined( __AMIGAOS4__ )
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home = tr_strdup( "" );
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#else
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struct passwd * pw = getpwuid( getuid( ) );
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if( pw )
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home = tr_strdup( pw->pw_dir );
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endpwent( );
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#endif
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}
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if( !home )
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home = tr_strdup( "" );
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}
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return home;
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}
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static const char *
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getOldConfigDir( void )
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{
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static char * path = NULL;
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if( !path )
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{
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#ifdef __BEOS__
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char buf[MAX_PATH_LENGTH];
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find_directory( B_USER_SETTINGS_DIRECTORY,
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dev_for_path( "/boot" ), true,
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buf, sizeof( buf ) );
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path = tr_buildPath( buf, "Transmission", NULL );
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#elif defined( SYS_DARWIN )
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path = tr_buildPath( getHomeDir( ), "Library",
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"Application Support",
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"Transmission", NULL );
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#elif defined( __AMIGAOS4__ )
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path = tr_strdup( "PROGDIR:.transmission" );
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#elif defined( WIN32 )
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char appdata[MAX_PATH_LENGTH];
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SHGetFolderPath( NULL, CSIDL_APPDATA, NULL, 0, appdata );
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path = tr_buildPath( appdata, "Transmission", NULL );
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#else
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path = tr_buildPath( getHomeDir( ), ".transmission", NULL );
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#endif
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}
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return path;
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}
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#if defined(SYS_DARWIN) || defined(WIN32)
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#define RESUME_SUBDIR "Resume"
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#define TORRENT_SUBDIR "Torrents"
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#else
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#define RESUME_SUBDIR "resume"
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#define TORRENT_SUBDIR "torrents"
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#endif
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static const char *
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getOldTorrentsDir( void )
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{
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static char * path = NULL;
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if( !path )
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path = tr_buildPath( getOldConfigDir( ), TORRENT_SUBDIR, NULL );
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return path;
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}
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static const char *
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getOldCacheDir( void )
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{
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static char * path = NULL;
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if( !path )
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{
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#if defined( __BEOS__ ) || defined( WIN32 )
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path = tr_buildPath( getOldConfigDir( ), "Cache", NULL );
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#elif defined( SYS_DARWIN )
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path = tr_buildPath( getHomeDir( ), "Library", "Caches", "Transmission", NULL );
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#else
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path = tr_buildPath( getOldConfigDir( ), "cache", NULL );
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#endif
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}
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return path;
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}
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static void
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moveFiles( const char * oldDir,
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const char * newDir )
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{
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if( oldDir && newDir && strcmp( oldDir, newDir ) )
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{
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DIR * dirh = opendir( oldDir );
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if( dirh )
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{
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int count = 0;
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struct dirent * dirp;
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while( ( dirp = readdir( dirh ) ) )
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{
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if( strcmp( dirp->d_name,
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"." ) && strcmp( dirp->d_name, ".." ) )
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{
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char * o = tr_buildPath( oldDir, dirp->d_name, NULL );
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char * n = tr_buildPath( newDir, dirp->d_name, NULL );
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rename( o, n );
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++count;
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tr_free( n );
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tr_free( o );
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}
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}
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if( count )
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tr_inf( _( "Migrated %1$d files from \"%2$s\" to \"%3$s\"" ),
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count, oldDir, newDir );
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closedir( dirh );
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}
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}
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}
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static void
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migrateFiles( const tr_handle * handle )
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{
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static int migrated = FALSE;
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if( !migrated )
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{
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const char * oldDir;
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const char * newDir;
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migrated = TRUE;
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oldDir = getOldTorrentsDir( );
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newDir = tr_getTorrentDir( handle );
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moveFiles( oldDir, newDir );
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oldDir = getOldCacheDir( );
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newDir = tr_getResumeDir( handle );
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moveFiles( oldDir, newDir );
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}
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}
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void
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tr_setConfigDir( tr_handle * handle,
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const char * configDir )
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{
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char * path;
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handle->configDir = tr_strdup( configDir );
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path = tr_buildPath( configDir, RESUME_SUBDIR, NULL );
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tr_mkdirp( path, 0777 );
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handle->resumeDir = path;
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path = tr_buildPath( configDir, TORRENT_SUBDIR, NULL );
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tr_mkdirp( path, 0777 );
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handle->torrentDir = path;
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migrateFiles( handle );
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}
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const char *
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tr_sessionGetConfigDir( const tr_handle * handle )
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{
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return handle->configDir;
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}
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const char *
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tr_getTorrentDir( const tr_handle * handle )
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{
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return handle->torrentDir;
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}
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const char *
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tr_getResumeDir( const tr_handle * handle )
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{
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return handle->resumeDir;
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}
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const char*
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tr_getDefaultConfigDir( void )
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{
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static char * s = NULL;
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if( !s )
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{
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if( ( s = getenv( "TRANSMISSION_HOME" ) ) )
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{
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s = tr_strdup( s );
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}
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else
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{
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#ifdef SYS_DARWIN
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s = tr_buildPath( getHomeDir( ), "Library",
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"Application Support", "Transmission", NULL );
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#elif defined( WIN32 )
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char appdata[MAX_PATH]; /* SHGetFolderPath() requires MAX_PATH */
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SHGetFolderPath( NULL, CSIDL_APPDATA, NULL, 0, appdata );
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s = tr_buildPath( appdata, "Transmission", NULL );
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#else
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if( ( s = getenv( "XDG_CONFIG_HOME" ) ) )
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s = tr_buildPath( s, "transmission", NULL );
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else
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s = tr_buildPath( getHomeDir( ), ".config", "transmission", NULL );
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#endif
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}
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}
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return s;
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}
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/***
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****
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***/
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static int
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isClutchDir( const char * path )
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{
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struct stat sb;
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char * tmp = tr_buildPath( path, "javascript", "transmission.js", NULL );
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const int ret = !stat( tmp, &sb );
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tr_inf( _( "Searching for web interface file \"%s\"" ), tmp );
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tr_free( tmp );
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return ret;
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}
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const char *
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tr_getClutchDir( const tr_session * session UNUSED )
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{
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static char * s = NULL;
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if( !s )
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{
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if( ( s = getenv( "CLUTCH_HOME" ) ) )
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{
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s = tr_strdup( s );
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}
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else if( ( s = getenv( "TRANSMISSION_WEB_HOME" ) ) )
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{
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s = tr_strdup( s );
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}
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else
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{
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#ifdef SYS_DARWIN
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CFURLRef appURL = CFBundleCopyBundleURL( CFBundleGetMainBundle( ) );
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CFStringRef appRef = CFURLCopyFileSystemPath( appURL,
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kCFURLPOSIXPathStyle );
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const char * appString = CFStringGetCStringPtr( appRef,
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CFStringGetFastestEncoding( appRef ) );
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CFRelease( appURL );
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CFRelease( appRef );
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s = tr_buildPath( appString, "Contents", "Resources", "web", NULL );
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#elif defined( WIN32 )
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/* SHGetFolderPath explicitly requires MAX_PATH length */
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char dir[MAX_PATH];
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/* Generally, Web interface should be stored in a Web subdir of
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* calling executable dir. */
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if( s == NULL ) {
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/* First, we should check personal AppData/Transmission/Web */
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SHGetFolderPath( NULL, CSIDL_COMMON_APPDATA, NULL, 0, dir );
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s = tr_buildPath( dir, "Transmission", "Web", NULL );
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if( !isClutchDir( s ) ) {
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tr_free( s );
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s = NULL;
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}
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}
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if( s == NULL ) {
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/* check personal AppData */
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SHGetFolderPath( NULL, CSIDL_APPDATA, NULL, 0, dir );
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s = tr_buildPath( dir, "Transmission", "Web", NULL );
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if( !isClutchDir( s ) ) {
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tr_free( s );
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s = NULL;
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}
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}
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if( s == NULL) {
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/* check calling module place */
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GetModuleFileName( GetModuleHandle( NULL ), dir, sizeof( dir ) );
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s = tr_buildPath( dirname( dir ), "Web", NULL );
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if( !isClutchDir( s ) ) {
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tr_free( s );
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s = NULL;
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}
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}
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#else /* everyone else, follow the XDG spec */
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tr_list *candidates = NULL, *l;
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/* XDG_DATA_HOME should be the first in the list of candidates */
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s = getenv( "XDG_DATA_HOME" );
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if( s && *s )
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tr_list_append( &candidates, tr_strdup( s ) );
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else {
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char * dhome = tr_buildPath( getHomeDir( ), ".local", "share", NULL );
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tr_list_append( &candidates, dhome );
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}
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/* XDG_DATA_DIRS are the backup directories */
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s = getenv( "XDG_DATA_DIRS" );
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if( !s || !*s )
|
|
s = PACKAGE_DATA_DIR ":/usr/local/share/:/usr/share/";
|
|
while( s && *s )
|
|
{
|
|
char * end = strchr( s, ':' );
|
|
if( end )
|
|
{
|
|
tr_list_append( &candidates, tr_strndup( s, end - s ) );
|
|
s = end + 1;
|
|
}
|
|
else
|
|
{
|
|
tr_list_append( &candidates, tr_strdup( s ) );
|
|
break;
|
|
}
|
|
}
|
|
|
|
for( l = candidates; l; l = l->next )
|
|
{
|
|
char * path = tr_buildPath( l->data, "transmission", "web", NULL );
|
|
const int found = isClutchDir( path );
|
|
if( found ) {
|
|
s = path;
|
|
break;
|
|
}
|
|
tr_free( path );
|
|
}
|
|
|
|
tr_list_free( &candidates, tr_free );
|
|
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
tr_lockfile_state_t
|
|
tr_lockfile( const char * filename )
|
|
{
|
|
tr_lockfile_state_t ret;
|
|
|
|
#ifdef WIN32
|
|
|
|
HANDLE file = CreateFile(
|
|
filename,
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ |
|
|
FILE_SHARE_WRITE,
|
|
NULL,
|
|
OPEN_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
NULL );
|
|
if( file == INVALID_HANDLE_VALUE )
|
|
ret = TR_LOCKFILE_EOPEN;
|
|
else if( !LockFile( file, 0, 0, 1, 1 ) )
|
|
ret = TR_LOCKFILE_ELOCK;
|
|
else
|
|
ret = TR_LOCKFILE_SUCCESS;
|
|
|
|
#else
|
|
|
|
int fd = open( filename, O_RDWR | O_CREAT, 0666 );
|
|
if( fd < 0 )
|
|
ret = TR_LOCKFILE_EOPEN;
|
|
else
|
|
{
|
|
struct flock lk;
|
|
memset( &lk, 0, sizeof( lk ) );
|
|
lk.l_start = 0;
|
|
lk.l_len = 0;
|
|
lk.l_type = F_WRLCK;
|
|
lk.l_whence = SEEK_SET;
|
|
if( -1 == fcntl( fd, F_SETLK, &lk ) )
|
|
ret = TR_LOCKFILE_ELOCK;
|
|
else
|
|
ret = TR_LOCKFILE_SUCCESS;
|
|
}
|
|
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef WIN32
|
|
|
|
/* The following mmap functions are by Joerg Walter, and were taken from
|
|
* his paper at: http://www.genesys-e.de/jwalter/mix4win.htm
|
|
*/
|
|
|
|
#if defined(_MSC_VER)
|
|
__declspec( align( 4 ) ) static LONG volatile g_sl;
|
|
#else
|
|
static LONG volatile g_sl __attribute__ ( ( aligned ( 4 ) ) );
|
|
#endif
|
|
|
|
/* Wait for spin lock */
|
|
static int
|
|
slwait( LONG volatile *sl )
|
|
{
|
|
while( InterlockedCompareExchange ( sl, 1, 0 ) != 0 )
|
|
Sleep ( 0 );
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Release spin lock */
|
|
static int
|
|
slrelease( LONG volatile *sl )
|
|
{
|
|
InterlockedExchange ( sl, 0 );
|
|
return 0;
|
|
}
|
|
|
|
/* getpagesize for windows */
|
|
static long
|
|
getpagesize( void )
|
|
{
|
|
static long g_pagesize = 0;
|
|
|
|
if( !g_pagesize )
|
|
{
|
|
SYSTEM_INFO system_info;
|
|
GetSystemInfo ( &system_info );
|
|
g_pagesize = system_info.dwPageSize;
|
|
}
|
|
return g_pagesize;
|
|
}
|
|
|
|
static long
|
|
getregionsize( void )
|
|
{
|
|
static long g_regionsize = 0;
|
|
|
|
if( !g_regionsize )
|
|
{
|
|
SYSTEM_INFO system_info;
|
|
GetSystemInfo ( &system_info );
|
|
g_regionsize = system_info.dwAllocationGranularity;
|
|
}
|
|
return g_regionsize;
|
|
}
|
|
|
|
void *
|
|
mmap( void *ptr,
|
|
long size,
|
|
long prot,
|
|
long type,
|
|
long handle,
|
|
long arg )
|
|
{
|
|
static long g_pagesize;
|
|
static long g_regionsize;
|
|
|
|
/* Wait for spin lock */
|
|
slwait ( &g_sl );
|
|
/* First time initialization */
|
|
if( !g_pagesize )
|
|
g_pagesize = getpagesize ( );
|
|
if( !g_regionsize )
|
|
g_regionsize = getregionsize ( );
|
|
/* Allocate this */
|
|
ptr = VirtualAlloc ( ptr, size,
|
|
MEM_RESERVE | MEM_COMMIT | MEM_TOP_DOWN,
|
|
PAGE_READWRITE );
|
|
if( !ptr )
|
|
{
|
|
ptr = (void *) -1;
|
|
goto mmap_exit;
|
|
}
|
|
mmap_exit:
|
|
/* Release spin lock */
|
|
slrelease ( &g_sl );
|
|
return ptr;
|
|
}
|
|
|
|
long
|
|
munmap( void *ptr,
|
|
long size )
|
|
{
|
|
static long g_pagesize;
|
|
static long g_regionsize;
|
|
int rc = -1;
|
|
|
|
/* Wait for spin lock */
|
|
slwait ( &g_sl );
|
|
/* First time initialization */
|
|
if( !g_pagesize )
|
|
g_pagesize = getpagesize ( );
|
|
if( !g_regionsize )
|
|
g_regionsize = getregionsize ( );
|
|
/* Free this */
|
|
if( !VirtualFree ( ptr, 0,
|
|
MEM_RELEASE ) )
|
|
goto munmap_exit;
|
|
rc = 0;
|
|
munmap_exit:
|
|
/* Release spin lock */
|
|
slrelease ( &g_sl );
|
|
return rc;
|
|
}
|
|
|
|
#endif
|
|
|