private static extern SafeFileHandle CreateFile(
string lpFileName,
FileAccessDword dwDesiredAccess,
FileShareDword dwShareMode,
IntPtr lpSecurityAttributes,
CreationDispositionDword dwCreationDisposition,
FileAttributesDword dwFlagsAndAttributes,
IntPtr hTemplateFile);
private static SafeFileHandle OpenDirHandle(string dirPath, FileAccessDword accessMode)
{
var reparsePointHandle = CreateFile(dirPath, accessMode,
FileShareDword.Read | FileShareDword.Write | FileShareDword.Delete,
IntPtr.Zero, CreationDispositionDword.OpenExisting,
FileAttributesDword.BackupSemantics | FileAttributesDword.OpenReparsePoint, IntPtr.Zero);
var err = Marshal.GetLastWin32Error();
if (err == WIN32_ERROR_FILE_NOT_FOUND)
{
throw new DirectoryNotFoundException($"Cannot find the directory '{dirPath}'");
}
if (err != 0)
{
var winex = GetLastWin32Error($"Cannot open directory at path '{dirPath}'");
throw winex.InnerException is IOException ioex ? ioex : winex;
}
return(reparsePointHandle);
}
