/// <inheritdoc/>
public override WindowsPath Resolve()
{
if (_cachedResolve != null)
{
return(_cachedResolve);
}
using (var fs = File.OpenRead(PurePath.ToString()))
{
if (fs.SafeFileHandle == null)
{
return(this);
}
var builder = new StringBuilder(512);
GetFinalPathNameByHandle(fs.SafeFileHandle.DangerousGetHandle(),
builder, builder.Capacity, 0);
var newPath = builder.ToString();
if (newPath.StartsWith(ExtendedLengthPrefix) &&
!PurePath.ToString().StartsWith(ExtendedLengthPrefix))
{
newPath = newPath.Substring(ExtendedLengthPrefix.Length);
}
return(_cachedResolve = new WindowsPath(newPath));
}
}
/// <summary>
/// Return true if the path points to a junction. These are distinct
/// from symlinks.
/// </summary>
/// <returns></returns>
public bool IsJunction()
{
ReparsePoint rep;
return(ReparsePoint.TryCreate(PurePath.ToString(), out rep) &&
rep.Tag == ReparsePoint.TagType.JunctionPoint);
}
/// <inheritdoc/>
public override bool IsSymlink()
{
ReparsePoint rep;
return(ReparsePoint.TryCreate(PurePath.ToString(), out rep) &&
rep.Tag == ReparsePoint.TagType.SymbolicLink);
}
/// <inheritdoc/>
protected override StatInfo Stat(bool flushCache)
{
if (_cachedStat != null && !flushCache)
{
return(_cachedStat);
}
// http://www.delorie.com/gnu/docs/glibc/libc_284.html
var info = new FileInfo(PurePath.ToString());
var stat = new StatInfo
{
Size = info.Length,
ATime = info.LastAccessTimeUtc,
MTime = info.LastWriteTimeUtc,
CTime = info.CreationTimeUtc,
Device = 0,
Inode = 0,
Gid = 0,
Uid = 0,
Mode = 0 // TODO not implemented
};
_cachedStat = stat;
return(stat);
}
/// <summary>
/// Gets the type of the file in the filesystem. This is
/// unrelated to the extension/contents, rather it is an
/// enumeration between whether the path points to a directory,
/// file, symlink, socket, block device, etc.
/// This is currently only relevant to Posix/Linux systems.
/// </summary>
/// <returns></returns>
public FileType GetFileType()
{
var path = PurePath.ToString();
var err = Native.lstat(path, out var info);
if (err != 0)
{
var actualError = Marshal.GetLastWin32Error();
if (actualError == 2)
{
return(FileType.DoesNotExist);
}
throw new ApplicationException("Error: " + actualError);
}
var fmt = info.st_mode & Native.FileTypeFormat;
return(fmt switch
{
Native.FileTypeSymlink => FileType.SymbolicLink,
Native.FileTypeDirectory => FileType.Directory,
Native.FileTypeCharacterDevice => FileType.CharacterDevice,
Native.FileTypeBlockDevice => FileType.BlockDevice,
Native.FileTypeFifo => FileType.Fifo,
Native.FileTypeSocket => FileType.Socket,
Native.FileTypeRegularFile => FileType.RegularFile,
_ => throw new ApplicationException($"Unknown file type {fmt}")
});
/// <summary>
/// Compare two <see cref="PureWindowsPath"/> for equality.
/// Case insensitive.
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool Equals(WindowsPath other)
{
if (other is null)
{
return(false);
}
return(PurePath.Equals(other.PurePath));
}
/// <summary>
/// Convert a path that uses the short 8.3 name (e.g. DOCUME~2.docx)
/// into its long path.
/// </summary>
/// <returns></returns>
public WindowsPath ToLongPath()
{
var oldPath = PurePath.ToString();
var newPath = new StringBuilder(255);
if (GetLongPathName(oldPath, newPath, newPath.Capacity) == 0)
{
return(this);
}
return(new WindowsPath(PurePath.WithFilename(newPath.ToString()).ToString()));
}
/// <inheritdoc/>
public override WindowsPath ExpandUser()
{
var homeDir = new PureWindowsPath("~");
if (homeDir < PurePath)
{
var newDir = new PureWindowsPath(Environment.GetEnvironmentVariable("USERPROFILE"));
return(new WindowsPath(newDir.Join(PurePath.RelativeTo(homeDir))));
}
return(this);
}
/// <inheritdoc/>
public override string ToString()
{
return(PurePath.ToString());
}
/// <inheritdoc/>
public override int GetHashCode()
{
return(PurePath.GetHashCode());
}
/// <summary>
/// Compare two <see cref="PureWindowsPath"/> for equality.
/// Case insensitive.
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool Equals(WindowsPath other)
{
return(PurePath.Equals(other.PurePath));
}
/// <inheritdoc/>
protected override StatInfo Stat(bool flushCache)
{
if (_cachedStat != null && !flushCache)
{
return(_cachedStat);
}
var path = PurePath.ToString();
var err = Posix.Native.stat64(path, out var info);
if (err != 0)
{
var actualError = Marshal.GetLastWin32Error();
if (actualError == 2)
{
throw new FileNotFoundException("Cannot stat file that does not exist.", path);
}
throw new ApplicationException("Error: " + actualError);
}
var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
var atim = epoch.AddSeconds(info.st_atim.tv_sec);
if (info.st_atim.tv_nsec != 0)
{
atim = atim.AddTicks((long)(info.st_atim.tv_nsec / 100));
}
var mtim = epoch.AddSeconds(info.st_mtim.tv_sec);
if (info.st_mtim.tv_nsec != 0)
{
mtim = mtim.AddTicks((long)(info.st_mtim.tv_nsec / 100));
}
var ctim = epoch.AddSeconds(info.st_ctim.tv_sec);
if (info.st_ctim.tv_nsec != 0)
{
ctim = ctim.AddTicks((long)(info.st_ctim.tv_nsec / 100));
}
var stat = new StatInfo
{
Size = info.st_size,
ATime = atim,
MTime = mtim,
CTime = ctim,
Device = (long)info.st_dev,
Inode = (long)info.st_ino,
Gid = info.st_uid,
Uid = info.st_gid,
ModeDecimal = info.st_mode,
Mode = Convert.ToString(info.st_mode & (Native.SetBits | Native.UserBits | Native.GroupBits | Native.OtherBits), 8).PadLeft(4, '0'),
NumLinks = (long)info.st_nlink
};
try
{
_cachedStat = stat;
}
// Yes, this assignment throws a NRE if the struct alignment for pinvoke is wrong.
// It overwrites 'this' in the stack with null.
catch (NullReferenceException e)
{
throw new NotImplementedException("Layout of stat call not supported on this platform (Only supports Ubuntu x86_64 and anything compatible).", e);
}
return(stat);
}
