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static bool UnixSymlink(const char *Target,const wchar *LinkName,RarTime *ftm,RarTime *fta)
{
CreatePath(LinkName,true);
DelFile(LinkName);
char LinkNameA[NM];
WideToChar(LinkName,LinkNameA,ASIZE(LinkNameA));
if (symlink(Target,LinkNameA)==-1) // Error.
{
if (errno==EEXIST)
uiMsg(UIERROR_ULINKEXIST,LinkName);
else
{
uiMsg(UIERROR_SLINKCREATE,UINULL,LinkName);
ErrHandler.SetErrorCode(RARX_WARNING);
}
return false;
}
#ifdef USE_LUTIMES
#ifdef UNIX_TIME_NS
timespec times[2];
times[0].tv_sec=fta->GetUnix();
times[0].tv_nsec=fta->IsSet() ? long(fta->GetUnixNS()%1000000000) : UTIME_NOW;
times[1].tv_sec=ftm->GetUnix();
times[1].tv_nsec=ftm->IsSet() ? long(ftm->GetUnixNS()%1000000000) : UTIME_NOW;
utimensat(AT_FDCWD,LinkNameA,times,AT_SYMLINK_NOFOLLOW);
#else
struct timeval tv[2];
tv[0].tv_sec=fta->GetUnix();
tv[0].tv_usec=long(fta->GetUnixNS()%1000000000/1000);
tv[1].tv_sec=ftm->GetUnix();
tv[1].tv_usec=long(ftm->GetUnixNS()%1000000000/1000);
lutimes(LinkNameA,tv);
#endif
#endif
return true;
}
static bool IsFullPath(const char *PathA) // Unix ASCII version.
{
return *PathA==CPATHDIVIDER;
}
bool ExtractUnixLink30(CommandData *Cmd,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;
wchar TargetW[NM];
CharToWide(Target,TargetW,ASIZE(TargetW));
// Check for *TargetW==0 to catch CharToWide failure.
// Use Arc.FileHead.FileName instead of LinkName, since LinkName
// can include the destination path as a prefix, which can
// confuse IsRelativeSymlinkSafe algorithm.
if (!Cmd->AbsoluteLinks && (*TargetW==0 || IsFullPath(TargetW) ||
!IsRelativeSymlinkSafe(Cmd,Arc.FileHead.FileName,LinkName,TargetW)))
return false;
return UnixSymlink(Target,LinkName,&Arc.FileHead.mtime,&Arc.FileHead.atime);
}
return false;
}
bool ExtractUnixLink50(CommandData *Cmd,const wchar *Name,FileHeader *hd)
{
char Target[NM];
WideToChar(hd->RedirName,Target,ASIZE(Target));
if (hd->RedirType==FSREDIR_WINSYMLINK || hd->RedirType==FSREDIR_JUNCTION)
{
// Cannot create Windows absolute path symlinks in Unix. Only relative path
// Windows symlinks can be created here. RAR 5.0 used \??\ prefix
// for Windows absolute symlinks, since RAR 5.1 /??/ is used.
// We escape ? as \? to avoid "trigraph" warning
if (strncmp(Target,"\\??\\",4)==0 || strncmp(Target,"/\?\?/",4)==0)
return false;
DosSlashToUnix(Target,Target,ASIZE(Target));
}
// Use hd->FileName instead of LinkName, since LinkName can include
// the destination path as a prefix, which can confuse
// IsRelativeSymlinkSafe algorithm.
if (!Cmd->AbsoluteLinks && (IsFullPath(Target) ||
!IsRelativeSymlinkSafe(Cmd,hd->FileName,Name,hd->RedirName)))
return false;
return UnixSymlink(Target,Name,&hd->mtime,&hd->atime);
}