public Result <string> GetLinkTarget()
{
var type = NtdllHelper.GetObjectType(Name);
if (type != "SymbolicLink")
{
return(Result <string> .Failed("Not a symbolic link"));
}
var objectAttributes = new OBJECT_ATTRIBUTES(Name, 0);
var status = Ntdll.NtOpenSymbolicLinkObject(
out var linkHandle,
ACCESS_MASK.GENERIC_READ,
ref objectAttributes);
if (status < 0)
{
return(Result <string> .Failed("Open file failed with status " + status));
}
using (linkHandle)
{
var targetBuffer = new UNICODE_STRING(new string(' ', 512));
status = Ntdll.NtQuerySymbolicLinkObject(
linkHandle,
ref targetBuffer,
out var len);
return(status < 0
? Result <string> .Failed("Query link failed with status " + status)
: Result <string> .Succeeded(targetBuffer.ToString()));
}
}
public void GetObjectType_IsDirectory()
{
// test global namespace root
Assert.Equal("Directory", NtdllHelper.GetObjectType(@"\"));
// test ? on end of directory name
Assert.Equal("Directory", NtdllHelper.GetObjectType(@"\GLOBAL??"));
}
private static void Main(string[] args)
{
// default to root object namespace
var objectName = @"\";
if (args.Length > 0)
{
objectName = args[0];
}
var type = NtdllHelper.GetObjectType(objectName);
WriteLine($"Object type {type}: {objectName}");
switch (type)
{
case "Directory":
ListDirectoryContents(objectName);
break;
}
}
public void GetObjectType_DoesNotExist()
{
Assert.Null(NtdllHelper.GetObjectType(@"\BlahFooBar"));
}
public void GetObjectType_IsNotDirectory()
{
Assert.Equal("Device", NtdllHelper.GetObjectType(@"\clfs"));
// test C: symlink - tricky for parsing C: name
Assert.Equal("SymbolicLink", NtdllHelper.GetObjectType(@"\GLOBAL??\C:"));
}