mirror of
https://github.com/transmission/transmission
synced 2024-12-27 10:07:40 +00:00
501 lines
11 KiB
C
501 lines
11 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2008 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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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_PROFILE */
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#else
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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/types.h>
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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 "platform.h"
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#include "trcompat.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, 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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const char * name;
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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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const char * name = t->name;
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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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tr_dbg( "Thread '%s' started", name );
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t->func( t->arg );
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tr_dbg( "Thread '%s' exited", name );
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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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const char * name )
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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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t->name = name;
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#ifdef __BEOS__
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t->thread = spawn_thread( (void*)ThreadFunc, name, B_NORMAL_PRIORITY, 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 = (HANDLE) _beginthreadex( NULL, 0, &ThreadFunc, t, 0, &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 * (*) (void *)) ThreadFunc, t );
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#endif
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return t;
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}
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void
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tr_threadJoin( tr_thread * t )
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{
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if( t != NULL )
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{
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#ifdef __BEOS__
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long exit;
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wait_for_thread( t->thread, &exit );
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#elif defined(WIN32)
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WaitForSingleObject( t->thread_handle, INFINITE );
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CloseHandle( t->thread_handle );
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#else
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pthread_join( t->thread, NULL );
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#endif
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tr_dbg( "Thread '%s' joined", t->name );
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t->name = NULL;
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t->func = NULL;
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tr_free( t );
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}
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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 ); /* critical sections support 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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tr_getHomeDirectory( void )
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{
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static char buf[MAX_PATH_LENGTH];
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static int init = 0;
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const char * envHome;
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if( init )
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return buf;
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envHome = getenv( "HOME" );
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if( envHome )
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snprintf( buf, sizeof(buf), "%s", envHome );
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else {
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#ifdef WIN32
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SHGetFolderPath( NULL, CSIDL_PROFILE, NULL, 0, buf );
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#elif defined(__BEOS__) || defined(__AMIGAOS4__)
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*buf = '\0';
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#else
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struct passwd * pw = getpwuid( getuid() );
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endpwent();
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if( pw != NULL )
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snprintf( buf, sizeof(buf), "%s", pw->pw_dir );
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#endif
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}
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init = 1;
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return buf;
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}
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static void
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tr_migrateResume( const char *oldDirectory, const char *newDirectory )
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{
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DIR * dirh = opendir( oldDirectory );
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if( dirh != NULL )
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{
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struct dirent * dirp;
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while( ( dirp = readdir( dirh ) ) )
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{
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if( !strncmp( "resume.", dirp->d_name, 7 ) )
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{
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char o[MAX_PATH_LENGTH];
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char n[MAX_PATH_LENGTH];
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tr_buildPath( o, sizeof(o), oldDirectory, dirp->d_name, NULL );
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tr_buildPath( n, sizeof(n), newDirectory, dirp->d_name, NULL );
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rename( o, n );
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}
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}
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closedir( dirh );
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}
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}
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const char *
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tr_getPrefsDirectory( void )
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{
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static char buf[MAX_PATH_LENGTH];
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static int init = 0;
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const char * trhome;
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if( init )
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return buf;
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trhome = getenv( "TRANSMISSION_HOME" );
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if( trhome != NULL )
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{
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strlcpy( buf, trhome, sizeof( buf ) );
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}
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else
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{
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#ifdef __BEOS__
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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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strcat( buf, "/Transmission" );
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#elif defined( SYS_DARWIN )
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tr_buildPath ( buf, sizeof( buf ),
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tr_getHomeDirectory( ),
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"Library",
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"Application Support",
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"Transmission",
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NULL );
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#elif defined(__AMIGAOS4__)
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strlcpy( buf, "PROGDIR:.transmission", sizeof( buf ) );
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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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tr_buildPath( buf, sizeof(buf),
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appdata,
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"Transmission",
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NULL );
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#else
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tr_buildPath ( buf, sizeof(buf), tr_getHomeDirectory( ), ".transmission", NULL );
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#endif
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}
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tr_mkdirp( buf, 0777 );
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init = 1;
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#ifdef SYS_DARWIN
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char old[MAX_PATH_LENGTH];
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tr_buildPath ( old, sizeof(old),
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tr_getHomeDirectory(), ".transmission", NULL );
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tr_migrateResume( old, buf );
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rmdir( old );
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#endif
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return buf;
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}
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const char *
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tr_getCacheDirectory( void )
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{
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static char buf[MAX_PATH_LENGTH];
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static int init = 0;
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static const size_t buflen = sizeof(buf);
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const char * p;
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if( init )
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return buf;
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p = tr_getPrefsDirectory();
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#if defined(__BEOS__) || defined(WIN32)
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tr_buildPath( buf, buflen, p, "Cache", NULL );
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#elif defined( SYS_DARWIN )
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tr_buildPath( buf, buflen, tr_getHomeDirectory(),
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"Library", "Caches", "Transmission", NULL );
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#else
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tr_buildPath( buf, buflen, p, "cache", NULL );
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#endif
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tr_mkdirp( buf, 0777 );
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init = 1;
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if( strcmp( p, buf ) )
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tr_migrateResume( p, buf );
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return buf;
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}
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const char *
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tr_getTorrentsDirectory( void )
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{
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static char buf[MAX_PATH_LENGTH];
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static int init = 0;
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static const size_t buflen = sizeof(buf);
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const char * p;
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if( init )
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return buf;
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p = tr_getPrefsDirectory ();
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#if defined(__BEOS__) || defined(WIN32)
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tr_buildPath( buf, buflen, p, "Torrents", NULL );
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#elif defined( SYS_DARWIN )
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tr_buildPath( buf, buflen, p, "Torrents", NULL );
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#else
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tr_buildPath( buf, buflen, p, "torrents", NULL );
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#endif
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tr_mkdirp( buf, 0777 );
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init = 1;
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return buf;
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}
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/***
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****
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***/
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int
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tr_lockfile( const char * filename )
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{
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int ret;
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#ifdef WIN32
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HANDLE file = CreateFile( filename,
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GENERIC_READ|GENERIC_WRITE,
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FILE_SHARE_READ|FILE_SHARE_WRITE,
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NULL,
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OPEN_ALWAYS,
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FILE_ATTRIBUTE_NORMAL,
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NULL );
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if( file == INVALID_HANDLE_VALUE )
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ret = TR_LOCKFILE_EOPEN;
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else if( !LockFile( file, 0, 0, 1, 1 ) )
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ret = TR_LOCKFILE_ELOCK;
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else
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ret = TR_LOCKFILE_SUCCESS;
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#else
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int fd = open( filename, O_RDWR | O_CREAT, 0666 );
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if( fd < 0 )
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ret = TR_LOCKFILE_EOPEN;
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else {
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struct flock lk;
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memset( &lk, 0, sizeof( lk ) );
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lk.l_start = 0;
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lk.l_len = 0;
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lk.l_type = F_WRLCK;
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lk.l_whence = SEEK_SET;
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if( -1 == fcntl( fd, F_SETLK, &lk ) )
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ret = TR_LOCKFILE_ELOCK;
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else
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ret = TR_LOCKFILE_SUCCESS;
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}
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#endif
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return ret;
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}
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