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NFSFile.cpp
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NFSFile.cpp
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/*
* Copyright (C) 2011 Team XBMC
* http://www.xbmc.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
// FileNFS.cpp: implementation of the CNFSFile class.
//
//////////////////////////////////////////////////////////////////////
#include "system.h"
#ifdef HAS_FILESYSTEM_NFS
#include "DllLibNfs.h"
#include "NFSFile.h"
#include "threads/SingleLock.h"
#include "utils/log.h"
#include "utils/URIUtils.h"
#include "network/DNSNameCache.h"
#include "threads/SystemClock.h"
#include <nfsc/libnfs-raw-mount.h>
#ifdef TARGET_WINDOWS
#include <fcntl.h>
#include <sys\stat.h>
#endif
//KEEP_ALIVE_TIMEOUT is decremented every half a second
//480 * 0.5s == 240s == 4mins
//so when no read was done for 4mins and files are open
//do the nfs keep alive for the open files
#define KEEP_ALIVE_TIMEOUT 480
//4 mins cached context timeout
#define CONTEXT_TIMEOUT 240000
//return codes for getContextForExport
#define CONTEXT_INVALID 0 //getcontext failed
#define CONTEXT_NEW 1 //new context created
#define CONTEXT_CACHED 2 //context cached and therefore already mounted (no new mount needed)
using namespace XFILE;
CNfsConnection::CNfsConnection()
: m_pNfsContext(NULL)
, m_exportPath("")
, m_hostName("")
, m_resolvedHostName("")
, m_readChunkSize(0)
, m_writeChunkSize(0)
, m_OpenConnections(0)
, m_IdleTimeout(0)
, m_lastAccessedTime(0)
, m_pLibNfs(new DllLibNfs())
{
}
CNfsConnection::~CNfsConnection()
{
Deinit();
delete m_pLibNfs;
}
void CNfsConnection::resolveHost(const CURL &url)
{
//resolve if hostname has changed
CDNSNameCache::Lookup(url.GetHostName(), m_resolvedHostName);
}
std::list<CStdString> CNfsConnection::GetExportList(const CURL &url)
{
std::list<CStdString> retList;
if(HandleDyLoad())
{
struct exportnode *exportlist, *tmp;
exportlist = m_pLibNfs->mount_getexports(m_resolvedHostName);
tmp = exportlist;
for(tmp = exportlist; tmp!=NULL; tmp=tmp->ex_next)
{
retList.push_back(CStdString(tmp->ex_dir));
}
gNfsConnection.GetImpl()->mount_free_export_list(exportlist);
}
return retList;
}
bool CNfsConnection::HandleDyLoad()
{
bool ret = true;
if(!m_pLibNfs->IsLoaded())
{
if(!m_pLibNfs->Load())
{
CLog::Log(LOGERROR,"NFS: Error loading libnfs (%s).",__FUNCTION__);
ret = false; //fatal
}
}
return ret;
}
void CNfsConnection::clearMembers()
{
m_exportPath.clear();
m_hostName.clear();
m_exportList.clear();
m_writeChunkSize = 0;
m_readChunkSize = 0;
m_pNfsContext = NULL;
m_KeepAliveTimeouts.clear();
}
void CNfsConnection::destroyOpenContexts()
{
for(tOpenContextMap::iterator it = m_openContextMap.begin();it!=m_openContextMap.end();it++)
{
m_pLibNfs->nfs_destroy_context(it->second.pContext);
}
m_openContextMap.clear();
}
struct nfs_context *CNfsConnection::getContextFromMap(const CStdString &exportname)
{
struct nfs_context *pRet = NULL;
tOpenContextMap::iterator it = m_openContextMap.find(exportname.c_str());
if(it != m_openContextMap.end())
{
//check if context has timed out already
uint64_t now = XbmcThreads::SystemClockMillis();
if((now - it->second.lastAccessedTime) < CONTEXT_TIMEOUT)
{
//its not timedout yet
//refresh access time of that
//context and return it
CLog::Log(LOGDEBUG, "NFS: Refreshing context for %s, old: %"PRId64", new: %"PRId64, exportname.c_str(), it->second.lastAccessedTime, now);
it->second.lastAccessedTime = now;
pRet = it->second.pContext;
}
else
{
//context is timed out
//destroy it and return NULL
CLog::Log(LOGDEBUG, "NFS: Old context timed out - destroying it");
m_pLibNfs->nfs_destroy_context(it->second.pContext);
}
}
return pRet;
}
int CNfsConnection::getContextForExport(const CStdString &exportname)
{
int ret = CONTEXT_INVALID;
if(HandleDyLoad())
{
clearMembers();
m_pNfsContext = getContextFromMap(exportname);
if(!m_pNfsContext)
{
CLog::Log(LOGDEBUG,"NFS: Context for %s not open - get a new context.", exportname.c_str());
m_pNfsContext = m_pLibNfs->nfs_init_context();
if(!m_pNfsContext)
{
CLog::Log(LOGERROR,"NFS: Error initcontext in getContextForExport.");
}
else
{
struct contextTimeout tmp;
tmp.pContext = m_pNfsContext;
tmp.lastAccessedTime = XbmcThreads::SystemClockMillis();
m_openContextMap[exportname] = tmp; //add context to list of all contexts
ret = CONTEXT_NEW;
}
}
else
{
ret = CONTEXT_CACHED;
CLog::Log(LOGDEBUG,"NFS: Using cached context.");
}
m_lastAccessedTime = XbmcThreads::SystemClockMillis(); //refresh last access time of m_pNfsContext
}
return ret;
}
bool CNfsConnection::splitUrlIntoExportAndPath(const CURL& url, CStdString &exportPath, CStdString &relativePath)
{
bool ret = false;
//refresh exportlist if empty or hostname change
if(m_exportList.empty() || !url.GetHostName().Equals(m_hostName,false))
{
m_exportList = GetExportList(url);
}
if(!m_exportList.empty())
{
relativePath = "";
exportPath = "";
CStdString path = url.GetFileName();
//GetFileName returns path without leading "/"
//but we need it because the export paths start with "/"
//and path.Find(*it) wouldn't work else
if(!path.empty() && path[0] != '/')
{
path = "/" + path;
}
std::list<CStdString>::iterator it;
for(it=m_exportList.begin();it!=m_exportList.end();it++)
{
//if path starts with the current export path
if( path.Find(*it) == 0 )
{
exportPath = *it;
//handle special case where root is exported
//in that case we don't want to stripp off to
//much from the path
if( exportPath == "/" )
relativePath = "//" + path.Right((path.length()) - exportPath.length());
else
relativePath = "//" + path.Right((path.length()-1) - exportPath.length());
ret = true;
break;
}
}
}
return ret;
}
bool CNfsConnection::Connect(const CURL& url, CStdString &relativePath)
{
CSingleLock lock(*this);
bool ret = false;
int nfsRet = 0;
CStdString exportPath = "";
resolveHost(url);
ret = splitUrlIntoExportAndPath(url, exportPath, relativePath);
if( (ret && (!exportPath.Equals(m_exportPath,true)) ||
!url.GetHostName().Equals(m_hostName,false)) ||
(XbmcThreads::SystemClockMillis() - m_lastAccessedTime) > CONTEXT_TIMEOUT )
{
int contextRet = getContextForExport(url.GetHostName() + exportPath);
if(contextRet == CONTEXT_INVALID)//we need a new context because sharename or hostname has changed
{
return false;
}
if(contextRet == CONTEXT_NEW) //new context was created - we need to mount it
{
//we connect to the directory of the path. This will be the "root" path of this connection then.
//So all fileoperations are relative to this mountpoint...
nfsRet = m_pLibNfs->nfs_mount(m_pNfsContext, m_resolvedHostName.c_str(), exportPath.c_str());
if(nfsRet != 0)
{
CLog::Log(LOGERROR,"NFS: Failed to mount nfs share: %s (%s)\n", exportPath.c_str(), m_pLibNfs->nfs_get_error(m_pNfsContext));
return false;
}
CLog::Log(LOGDEBUG,"NFS: Connected to server %s and export %s\n", url.GetHostName().c_str(), exportPath.c_str());
}
m_exportPath = exportPath;
m_hostName = url.GetHostName();
//read chunksize only works after mount
m_readChunkSize = m_pLibNfs->nfs_get_readmax(m_pNfsContext);
m_writeChunkSize = m_pLibNfs->nfs_get_writemax(m_pNfsContext);
if(contextRet == CONTEXT_NEW)
{
CLog::Log(LOGDEBUG,"NFS: chunks: r/w %i/%i\n", (int)m_readChunkSize,(int)m_writeChunkSize);
}
}
return ret;
}
void CNfsConnection::Deinit()
{
if(m_pNfsContext && m_pLibNfs->IsLoaded())
{
destroyOpenContexts();
m_pNfsContext = NULL;
m_pLibNfs->Unload();
}
clearMembers();
}
/* This is called from CApplication::ProcessSlow() and is used to tell if nfs have been idle for too long */
void CNfsConnection::CheckIfIdle()
{
/* We check if there are open connections. This is done without a lock to not halt the mainthread. It should be thread safe as
worst case scenario is that m_OpenConnections could read 0 and then changed to 1 if this happens it will enter the if wich will lead to another check, wich is locked. */
if (m_OpenConnections == 0 && m_pNfsContext != NULL)
{ /* I've set the the maxiumum IDLE time to be 1 min and 30 sec. */
CSingleLock lock(*this);
if (m_OpenConnections == 0 /* check again - when locked */)
{
if (m_IdleTimeout > 0)
{
m_IdleTimeout--;
}
else
{
CLog::Log(LOGNOTICE, "NFS is idle. Closing the remaining connections.");
gNfsConnection.Deinit();
}
}
}
if( m_pNfsContext != NULL )
{
//handle keep alive on opened files
for( tFileKeepAliveMap::iterator it = m_KeepAliveTimeouts.begin();it!=m_KeepAliveTimeouts.end();it++)
{
CSingleLock lock(keepAliveLock);
if(it->second > 0)
{
it->second--;
}
else
{
lock.Leave();
keepAlive(it->first);
//reset timeout
resetKeepAlive(it->first);
}
}
}
}
//remove file handle from keep alive list on file close
void CNfsConnection::removeFromKeepAliveList(struct nfsfh *_pFileHandle)
{
CSingleLock lock(keepAliveLock);
m_KeepAliveTimeouts.erase(_pFileHandle);
}
//reset timeouts on read
void CNfsConnection::resetKeepAlive(struct nfsfh *_pFileHandle)
{
CSingleLock lock(keepAliveLock);
//adds new keys - refreshs existing ones
m_KeepAliveTimeouts[_pFileHandle] = KEEP_ALIVE_TIMEOUT;
}
//keep alive the filehandles nfs connection
//by blindly doing a read 32bytes - seek back to where
//we were before
void CNfsConnection::keepAlive(struct nfsfh *_pFileHandle)
{
off64_t offset = 0;
char buffer[32];
CLog::Log(LOGNOTICE, "NFS: sending keep alive after %i s.",KEEP_ALIVE_TIMEOUT/2);
CSingleLock lock(*this);
m_pLibNfs->nfs_lseek(m_pNfsContext, _pFileHandle, 0, SEEK_CUR, &offset);
m_pLibNfs->nfs_read(m_pNfsContext, _pFileHandle, 32, buffer);
m_pLibNfs->nfs_lseek(m_pNfsContext, _pFileHandle, offset, SEEK_SET, &offset);
}
int CNfsConnection::stat(const CURL &url, struct stat *statbuff)
{
CSingleLock lock(*this);
int nfsRet = 0;
CStdString exportPath;
CStdString relativePath;
struct nfs_context *pTmpContext = NULL;
if(!HandleDyLoad())
{
return -1;
}
resolveHost(url);
if(splitUrlIntoExportAndPath(url, exportPath, relativePath))
{
pTmpContext = m_pLibNfs->nfs_init_context();
if(pTmpContext)
{
//we connect to the directory of the path. This will be the "root" path of this connection then.
//So all fileoperations are relative to this mountpoint...
nfsRet = m_pLibNfs->nfs_mount(pTmpContext, m_resolvedHostName.c_str(), exportPath.c_str());
if(nfsRet == 0)
{
nfsRet = m_pLibNfs->nfs_stat(pTmpContext, relativePath.c_str(), statbuff);
}
else
{
CLog::Log(LOGERROR,"NFS: Failed to mount nfs share: %s (%s)\n", exportPath.c_str(), m_pLibNfs->nfs_get_error(m_pNfsContext));
}
m_pLibNfs->nfs_destroy_context(pTmpContext);
CLog::Log(LOGDEBUG,"NFS: Connected to server %s and export %s in tmpContext\n", url.GetHostName().c_str(), exportPath.c_str());
}
}
return nfsRet;
}
/* The following two function is used to keep track on how many Opened files/directories there are.
needed for unloading the dylib*/
void CNfsConnection::AddActiveConnection()
{
CSingleLock lock(*this);
m_OpenConnections++;
}
void CNfsConnection::AddIdleConnection()
{
CSingleLock lock(*this);
m_OpenConnections--;
/* If we close a file we reset the idle timer so that we don't have any wierd behaviours if a user
leaves the movie paused for a long while and then press stop */
m_IdleTimeout = 180;
}
CNfsConnection gNfsConnection;
CNFSFile::CNFSFile()
: m_fileSize(0)
, m_pFileHandle(NULL)
, m_pNfsContext(NULL)
{
gNfsConnection.AddActiveConnection();
}
CNFSFile::~CNFSFile()
{
Close();
gNfsConnection.AddIdleConnection();
}
int64_t CNFSFile::GetPosition()
{
int ret = 0;
off64_t offset = 0;
CSingleLock lock(gNfsConnection);
if (gNfsConnection.GetNfsContext() == NULL || m_pFileHandle == NULL) return 0;
ret = (int)gNfsConnection.GetImpl()->nfs_lseek(gNfsConnection.GetNfsContext(), m_pFileHandle, 0, SEEK_CUR, &offset);
if (ret < 0)
{
CLog::Log(LOGERROR, "NFS: Failed to lseek(%s)",gNfsConnection.GetImpl()->nfs_get_error(gNfsConnection.GetNfsContext()));
}
return offset;
}
int64_t CNFSFile::GetLength()
{
if (m_pFileHandle == NULL) return 0;
return m_fileSize;
}
bool CNFSFile::Open(const CURL& url)
{
int ret = 0;
Close();
// we can't open files like nfs://file.f or nfs://server/file.f
// if a file matches the if below return false, it can't exist on a nfs share.
if (!IsValidFile(url.GetFileName()))
{
CLog::Log(LOGNOTICE,"NFS: Bad URL : '%s'",url.GetFileName().c_str());
return false;
}
CStdString filename = "";
CSingleLock lock(gNfsConnection);
if(!gNfsConnection.Connect(url, filename))
return false;
m_pNfsContext = gNfsConnection.GetNfsContext();
ret = gNfsConnection.GetImpl()->nfs_open(m_pNfsContext, filename.c_str(), O_RDONLY, &m_pFileHandle);
if (ret != 0)
{
CLog::Log(LOGINFO, "CNFSFile::Open: Unable to open file : '%s' error : '%s'", url.GetFileName().c_str(), gNfsConnection.GetImpl()->nfs_get_error(m_pNfsContext));
return false;
}
CLog::Log(LOGDEBUG,"CNFSFile::Open - opened %s",url.GetFileName().c_str());
m_url=url;
struct __stat64 tmpBuffer;
if( Stat(&tmpBuffer) )
{
m_url.Reset();
Close();
return false;
}
m_fileSize = tmpBuffer.st_size;//cache the size of this file
// We've successfully opened the file!
return true;
}
bool CNFSFile::Exists(const CURL& url)
{
return Stat(url,NULL) == 0;
}
int CNFSFile::Stat(struct __stat64* buffer)
{
return Stat(m_url,buffer);
}
int CNFSFile::Stat(const CURL& url, struct __stat64* buffer)
{
int ret = 0;
CSingleLock lock(gNfsConnection);
CStdString filename = "";
if(!gNfsConnection.Connect(url,filename))
return -1;
struct stat tmpBuffer = {0};
ret = gNfsConnection.GetImpl()->nfs_stat(gNfsConnection.GetNfsContext(), filename.c_str(), &tmpBuffer);
//if buffer == NULL we where called from Exists - in that case don't spam the log with errors
if (ret != 0 && buffer != NULL)
{
CLog::Log(LOGERROR, "NFS: Failed to stat(%s) %s\n", url.GetFileName().c_str(), gNfsConnection.GetImpl()->nfs_get_error(gNfsConnection.GetNfsContext()));
ret = -1;
}
else
{
if(buffer)
{
memset(buffer, 0, sizeof(struct __stat64));
buffer->st_dev = tmpBuffer.st_dev;
buffer->st_ino = tmpBuffer.st_ino;
buffer->st_mode = tmpBuffer.st_mode;
buffer->st_nlink = tmpBuffer.st_nlink;
buffer->st_uid = tmpBuffer.st_uid;
buffer->st_gid = tmpBuffer.st_gid;
buffer->st_rdev = tmpBuffer.st_rdev;
buffer->st_size = tmpBuffer.st_size;
buffer->st_atime = tmpBuffer.st_atime;
buffer->st_mtime = tmpBuffer.st_mtime;
buffer->st_ctime = tmpBuffer.st_ctime;
}
}
return ret;
}
unsigned int CNFSFile::Read(void *lpBuf, int64_t uiBufSize)
{
int numberOfBytesRead = 0;
CSingleLock lock(gNfsConnection);
if (m_pFileHandle == NULL || m_pNfsContext == NULL ) return 0;
numberOfBytesRead = gNfsConnection.GetImpl()->nfs_read(m_pNfsContext, m_pFileHandle, (size_t)uiBufSize, (char *)lpBuf);
lock.Leave();//no need to keep the connection lock after that
gNfsConnection.resetKeepAlive(m_pFileHandle);//triggers keep alive timer reset for this filehandle
//something went wrong ...
if (numberOfBytesRead < 0)
{
CLog::Log(LOGERROR, "%s - Error( %d, %s )", __FUNCTION__, numberOfBytesRead, gNfsConnection.GetImpl()->nfs_get_error(m_pNfsContext));
return 0;
}
return (unsigned int)numberOfBytesRead;
}
int64_t CNFSFile::Seek(int64_t iFilePosition, int iWhence)
{
int ret = 0;
off64_t offset = 0;
CSingleLock lock(gNfsConnection);
if (m_pFileHandle == NULL || m_pNfsContext == NULL) return -1;
ret = (int)gNfsConnection.GetImpl()->nfs_lseek(m_pNfsContext, m_pFileHandle, iFilePosition, iWhence, &offset);
if (ret < 0)
{
CLog::Log(LOGERROR, "%s - Error( seekpos: %"PRId64", whence: %i, fsize: %"PRId64", %s)", __FUNCTION__, iFilePosition, iWhence, m_fileSize, gNfsConnection.GetImpl()->nfs_get_error(m_pNfsContext));
return -1;
}
return (int64_t)offset;
}
void CNFSFile::Close()
{
CSingleLock lock(gNfsConnection);
if (m_pFileHandle != NULL && m_pNfsContext != NULL)
{
int ret = 0;
CLog::Log(LOGDEBUG,"CNFSFile::Close closing file %s", m_url.GetFileName().c_str());
ret = gNfsConnection.GetImpl()->nfs_close(m_pNfsContext, m_pFileHandle);
gNfsConnection.removeFromKeepAliveList(m_pFileHandle);
if (ret < 0)
{
CLog::Log(LOGERROR, "Failed to close(%s) - %s\n", m_url.GetFileName().c_str(), gNfsConnection.GetImpl()->nfs_get_error(m_pNfsContext));
}
m_pFileHandle = NULL;
m_pNfsContext = NULL;
m_fileSize = 0;
}
}
//this was a bitch!
//for nfs write to work we have to write chunked
//otherwise this could crash on big files
int CNFSFile::Write(const void* lpBuf, int64_t uiBufSize)
{
int numberOfBytesWritten = 0;
int writtenBytes = 0;
int64_t leftBytes = uiBufSize;
//clamp max write chunksize to 32kb - fixme - this might be superfluious with future libnfs versions
int64_t chunkSize = gNfsConnection.GetMaxWriteChunkSize() > 32768 ? 32768 : gNfsConnection.GetMaxWriteChunkSize();
CSingleLock lock(gNfsConnection);
if (m_pFileHandle == NULL || m_pNfsContext == NULL) return -1;
//write as long as some bytes are left to be written
while( leftBytes )
{
//the last chunk could be smalle than chunksize
if(leftBytes < chunkSize)
{
chunkSize = leftBytes;//write last chunk with correct size
}
//write chunk
writtenBytes = gNfsConnection.GetImpl()->nfs_write(m_pNfsContext,
m_pFileHandle,
(size_t)chunkSize,
(char *)lpBuf + numberOfBytesWritten);
//decrease left bytes
leftBytes-= writtenBytes;
//increase overall written bytes
numberOfBytesWritten += writtenBytes;
//danger - something went wrong
if (writtenBytes < 0)
{
CLog::Log(LOGERROR, "Failed to pwrite(%s) %s\n", m_url.GetFileName().c_str(), gNfsConnection.GetImpl()->nfs_get_error(m_pNfsContext));
break;
}
}
//return total number of written bytes
return numberOfBytesWritten;
}
bool CNFSFile::Delete(const CURL& url)
{
int ret = 0;
CSingleLock lock(gNfsConnection);
CStdString filename = "";
if(!gNfsConnection.Connect(url, filename))
return false;
ret = gNfsConnection.GetImpl()->nfs_unlink(gNfsConnection.GetNfsContext(), filename.c_str());
if(ret != 0)
{
CLog::Log(LOGERROR, "%s - Error( %s )", __FUNCTION__, gNfsConnection.GetImpl()->nfs_get_error(gNfsConnection.GetNfsContext()));
}
return (ret == 0);
}
bool CNFSFile::Rename(const CURL& url, const CURL& urlnew)
{
int ret = 0;
CSingleLock lock(gNfsConnection);
CStdString strFile = "";
if(!gNfsConnection.Connect(url,strFile))
return false;
CStdString strFileNew;
CStdString strDummy;
gNfsConnection.splitUrlIntoExportAndPath(urlnew, strDummy, strFileNew);
ret = gNfsConnection.GetImpl()->nfs_rename(gNfsConnection.GetNfsContext() , strFile.c_str(), strFileNew.c_str());
if(ret != 0)
{
CLog::Log(LOGERROR, "%s - Error( %s )", __FUNCTION__, gNfsConnection.GetImpl()->nfs_get_error(gNfsConnection.GetNfsContext()));
}
return (ret == 0);
}
bool CNFSFile::OpenForWrite(const CURL& url, bool bOverWrite)
{
int ret = 0;
// we can't open files like nfs://file.f or nfs://server/file.f
// if a file matches the if below return false, it can't exist on a nfs share.
if (!IsValidFile(url.GetFileName())) return false;
Close();
CSingleLock lock(gNfsConnection);
CStdString filename = "";
if(!gNfsConnection.Connect(url,filename))
return false;
m_pNfsContext = gNfsConnection.GetNfsContext();
if (bOverWrite)
{
CLog::Log(LOGWARNING, "FileNFS::OpenForWrite() called with overwriting enabled! - %s", filename.c_str());
//create file with proper permissions
ret = gNfsConnection.GetImpl()->nfs_creat(m_pNfsContext, filename.c_str(), S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, &m_pFileHandle);
//if file was created the file handle isn't valid ... so close it and open later
if(ret == 0)
{
gNfsConnection.GetImpl()->nfs_close(m_pNfsContext,m_pFileHandle);
}
}
ret = gNfsConnection.GetImpl()->nfs_open(m_pNfsContext, filename.c_str(), O_RDWR, &m_pFileHandle);
if (ret || m_pFileHandle == NULL)
{
// write error to logfile
CLog::Log(LOGERROR, "CNFSFile::Open: Unable to open file : '%s' error : '%s'", filename.c_str(), gNfsConnection.GetImpl()->nfs_get_error(gNfsConnection.GetNfsContext()));
return false;
}
m_url=url;
struct __stat64 tmpBuffer = {0};
//only stat if file was not created
if(!bOverWrite)
{
if(Stat(&tmpBuffer))
{
m_url.Reset();
Close();
return false;
}
m_fileSize = tmpBuffer.st_size;//cache filesize of this file
}
else//file was created - filesize is zero
{
m_fileSize = 0;
}
// We've successfully opened the file!
return true;
}
bool CNFSFile::IsValidFile(const CStdString& strFileName)
{
if (strFileName.Find('/') == -1 || /* doesn't have sharename */
strFileName.Right(2) == "/." || /* not current folder */
strFileName.Right(3) == "/..") /* not parent folder */
return false;
return true;
}
#endif//HAS_FILESYSTEM_NFS