bool ExtractLink(ComprDataIO &DataIO,Archive &Arc,const char *LinkName,uint &LinkCRC,bool Create)
{
#if defined(SAVE_LINKS) && defined(_UNIX)
char LinkTarget[NM];
if (IsLink(Arc.NewLhd.FileAttr))
{
int DataSize=Min(Arc.NewLhd.PackSize,sizeof(LinkTarget)-1);
DataIO.UnpRead((byte *)LinkTarget,DataSize);
LinkTarget[DataSize]=0;
if (Create)
{
CreatePath(LinkName,NULL,true);
if (symlink(LinkTarget,LinkName)==-1) // Error.
if (errno==EEXIST)
Log(Arc.FileName,St(MSymLinkExists),LinkName);
else
{
Log(Arc.FileName,St(MErrCreateLnk),LinkName);
ErrHandler.SetErrorCode(RARX_WARNING);
}
// We do not set time of created symlink, because utime changes
// time of link target and lutimes is not available on all Linux
// systems at the moment of writing this code.
}
int NameSize=Min(DataSize,strlen(LinkTarget));
LinkCRC=CRC(0xffffffff,LinkTarget,NameSize);
return(true);
}
#endif
return(false);
}
int ExtractLink(ComprDataIO &DataIO,Archive &Arc,char *DestName,unsigned int &LinkCRC,bool Create)
{
#if defined(SAVE_LINKS) && defined(_UNIX)
char FileName[NM];
if (IsLink(Arc.NewLhd.FileAttr))
{
int DataSize=Min(Arc.NewLhd.PackSize,sizeof(FileName)-1);
DataIO.UnpRead((unsigned char *)FileName,DataSize);
FileName[DataSize]=0;
if (Create)
{
CreatePath(DestName,NULL,true);
if (symlink(FileName,DestName)==-1)
if (errno==EEXIST)
Log(Arc.FileName,St(MSymLinkExists),DestName);
else
{
Log(Arc.FileName,St(MErrCreateLnk),DestName);
ErrHandler.SetErrorCode(WARNING);
}
}
LinkCRC=CRC(0xffffffff,FileName,DataSize);
return(1);
}
#endif
return(0);
}
int ExtractLink(ComprDataIO &DataIO,Archive &Arc,char *DestName,uint &LinkCRC,bool Create)
{
#if defined(SAVE_LINKS) && defined(_UNIX)
char FileName[NM];
if (IsLink(Arc.NewLhd.FileAttr))
{
uint DataSize=Min(Arc.NewLhd.PackSize,sizeof(FileName)-1);
DataIO.UnpRead((byte *)FileName,DataSize);
FileName[DataSize]=0;
if (Create)
{
CStdString strPath = URIUtils::GetDirectory(DestName);
CUtil::CreateDirectoryEx(strPath);
if (symlink(FileName,DestName)==-1)
{
if (errno==EEXIST)
Log(Arc.FileName,St(MSymLinkExists),DestName);
else
{
Log(Arc.FileName,St(MErrCreateLnk),DestName);
ErrHandler.SetErrorCode(WARNING);
}
}
}
int NameSize=Min(DataSize,strlen(FileName));
LinkCRC=CRC(0xffffffff,FileName,NameSize); return(1);
}
#endif
return(0);
}
void CmdExtract::UnstoreFile(ComprDataIO &DataIO,int64 DestUnpSize)
{
Array<byte> Buffer(0x40000);
while (1)
{
uint Code=DataIO.UnpRead(&Buffer[0],Buffer.Size());
if (Code==0 || (int)Code==-1)
break;
Code=Code<DestUnpSize ? Code:(uint)DestUnpSize;
DataIO.UnpWrite(&Buffer[0],Code);
if (DestUnpSize>=0)
DestUnpSize-=Code;
}
}
void CmdExtract::UnstoreFile(ComprDataIO &DataIO,int64 DestUnpSize)
{
// 512 KB and larger buffer reported to reduce performance on old XP
// computers with WDC WD2000JD HDD. According to test made by user
// 256 KB buffer is optimal.
Array<byte> Buffer(0x40000);
while (1)
{
uint Code=DataIO.UnpRead(&Buffer[0],Buffer.Size());
if (Code==0 || (int)Code==-1)
break;
Code=Code<DestUnpSize ? Code:(uint)DestUnpSize;
DataIO.UnpWrite(&Buffer[0],Code);
if (DestUnpSize>=0)
DestUnpSize-=Code;
}
}
bool ExtractUnixLink30(ComprDataIO &DataIO,Archive &Arc,const wchar *LinkName)
{
char Target[NM];
if (IsLink(Arc.FileHead.FileAttr))
{
size_t DataSize=Min(Arc.FileHead.PackSize,ASIZE(Target)-1);
DataIO.UnpRead((byte *)Target,DataSize);
Target[DataSize]=0;
DataIO.UnpHash.Init(Arc.FileHead.FileHash.Type,1);
DataIO.UnpHash.Update(Target,strlen(Target));
DataIO.UnpHash.Result(&Arc.FileHead.FileHash);
// Return true in case of bad checksum, so link will be processed further
// and extraction routine will report the checksum error.
if (!DataIO.UnpHash.Cmp(&Arc.FileHead.FileHash,Arc.FileHead.UseHashKey ? Arc.FileHead.HashKey:NULL))
return true;
return UnixSymlink(Target,LinkName);
}
return false;
}
void CPsfRarArchive::ReadFileContents(const char* fileName, void* buffer, unsigned int bufferLength)
{
Archive* arc(ConvertArchive(m_archive));
if(!arc->IsOpened())
{
throw std::runtime_error("Archive isn't opened.");
}
std::string fixedFileName(fileName);
boost::replace_all(fixedFileName, "/", "\\");
arc->Seek(0, SEEK_SET);
ComprDataIO dataIo;
dataIo.Init();
Unpack unpack(&dataIo);
while(arc->ReadHeader() > 0)
{
if(arc->ShortBlock.HeaderType == HEAD_FILE)
{
if(!arc->IsArcDir())
{
bool isGoodFile = !stricmp(fixedFileName.c_str(), string_cast<std::string>(arc->FileHead.FileName).c_str());
dataIo.SetFiles(arc, NULL);
dataIo.SetPackedSizeToRead(arc->FileHead.PackSize);
dataIo.CurUnpRead = 0;
dataIo.CurUnpWrite = 0;
dataIo.UnpHash.Init(arc->FileHead.FileHash.Type, 1);
dataIo.PackedDataHash.Init(arc->FileHead.FileHash.Type, 1);
dataIo.SetTestMode(!isGoodFile);
if(isGoodFile)
{
dataIo.SetUnpackToMemory(reinterpret_cast<byte*>(buffer), bufferLength);
}
unpack.Init(arc->FileHead.WinSize, arc->FileHead.Solid);
unpack.SetDestSize(arc->FileHead.UnpSize);
if(arc->FileHead.Method == 0x30)
{
std::vector<byte> unstoreBuffer;
unstoreBuffer.resize(0x10000);
uint toReadSize = arc->FileHead.UnpSize;
while(1)
{
uint code = dataIo.UnpRead(&unstoreBuffer[0], unstoreBuffer.size());
if(code == 0 || code == -1) break;
code = code < toReadSize ? code : toReadSize;
dataIo.UnpWrite(&unstoreBuffer[0], code);
if(toReadSize >= 0)
{
toReadSize -= code;
}
}
}
else
{
unpack.DoUnpack(arc->FileHead.UnpVer, arc->FileHead.Solid);
}
if(!dataIo.UnpHash.Cmp(&arc->FileHead.FileHash, arc->FileHead.UseHashKey ? arc->FileHead.HashKey : nullptr))
{
throw std::runtime_error("CRC check error.");
}
if(isGoodFile)
{
return;
}
}
}
arc->SeekToNext();
}
throw std::runtime_error("Couldn't read file from archive.");
}
