static extern bool SetLxssEa(SafeFileHandle hFile, LxssEaData data, int dataLength);
public static void ExtractTar(Stream stream, string tarRootPath, string targetPath)
{
targetPath = targetPath.ToExactPath();
Utils.Log($"Extracting the tar file to \"{targetPath}\".");
using (var tar = new TarInputStream(stream)) {
while (true)
{
var entry = tar.GetNextEntry();
if (entry == null)
{
break;
}
var type = entry.TarHeader.TypeFlag;
var newFilePath = entry.Name.StripRootPath(tarRootPath);
if (newFilePath == null)
{
continue;
}
newFilePath = Path.Combine(targetPath, newFilePath.ToWslPath());
if (type == TarHeader.LF_LINK)
{
var linkTargetPath = entry.TarHeader.LinkName.StripRootPath(tarRootPath);
if (linkTargetPath == null)
{
Utils.Warning($"Igoring the hard link \"{newFilePath}\" to \"{entry.TarHeader.LinkName}\", which points to a location out of the specified root directory.");
continue;
}
linkTargetPath = Path.Combine(targetPath, linkTargetPath.ToWslPath());
using (var hTarget = GetFileHandle(linkTargetPath.ToNtPath(), false, false, false)) {
CheckFileHandle(hTarget, linkTargetPath);
if (!MakeHardLink(hTarget, newFilePath.ToNtPath()))
{
Utils.Error($"Couldn't create the hard link from \"{newFilePath}\" to \"{linkTargetPath}\".");
}
}
}
else
{
using (var hNew = GetFileHandle(newFilePath.ToNtPath(), type == TarHeader.LF_DIR, true, true)) {
CheckFileHandle(hNew, newFilePath);
var eaData = new LxssEaData {
Mode = entry.TarHeader.Mode,
Uid = entry.UserId,
Gid = entry.GroupId
};
DateTimeOffset modTime = DateTime.SpecifyKind(entry.ModTime, DateTimeKind.Utc);
eaData.Atime = eaData.Mtime = eaData.Ctime = modTime.ToUnixTimeSeconds();
switch (type)
{
case TarHeader.LF_DIR:
eaData.Mode |= 0x4000;
break;
case TarHeader.LF_SYMLINK:
eaData.Mode |= 0xa000;
break;
case TarHeader.LF_OLDNORM:
goto case TarHeader.LF_NORMAL;
case TarHeader.LF_NORMAL:
eaData.Mode |= 0x8000;
break;
default:
Utils.Warning($"Ignoring the file \"{entry.Name}\" of unsupported file type '{(char)type}'.");
continue;
}
if (!SetLxssEa(hNew, eaData, Marshal.SizeOf(typeof(LxssEaData))))
{
Utils.Error($"Couldn't set extended attributes of \"{newFilePath}\".");
}
if (type == TarHeader.LF_DIR)
{
continue;
}
using (var fsNew = new FileStream(hNew, FileAccess.Write)) {
if (entry.TarHeader.TypeFlag == TarHeader.LF_SYMLINK)
{
var linkData = Encoding.UTF8.GetBytes(entry.TarHeader.LinkName);
fsNew.Write(linkData, 0, linkData.Length);
}
else
{
tar.CopyEntryContents(fsNew);
}
}
}
}
}
}
}
