/// <summary>
/// Get the ids for all processes that have a handle to this file system object.
/// Does not include the current process.
/// </summary>
public unsafe static IEnumerable <UIntPtr> GetProcessIds(SafeFileHandle fileHandle)
{
return(BufferHelper.BufferInvoke((HeapBuffer buffer) =>
{
NTStatus status = NTStatus.STATUS_INFO_LENGTH_MISMATCH;
while (status == NTStatus.STATUS_INFO_LENGTH_MISMATCH)
{
status = Imports.NtQueryInformationFile(fileHandle, out IO_STATUS_BLOCK statusBlock,
buffer.VoidPointer, (uint)buffer.ByteCapacity, FileInformationClass.FileProcessIdsUsingFileInformation);
switch (status)
{
case NTStatus.STATUS_SUCCESS:
break;
case NTStatus.STATUS_INFO_LENGTH_MISMATCH:
// Not a big enough buffer
buffer.EnsureByteCapacity((ulong)statusBlock.Information);
break;
default:
throw status.GetException();
}
}
return ((FILE_PROCESS_IDS_USING_FILE_INFORMATION *)buffer.VoidPointer)->ProcessIdList.ToArray();
}));
}
private void GetData()
{
NTStatus status = Imports.NtQueryDirectoryFile(
FileHandle: _directory,
Event: IntPtr.Zero,
ApcRoutine: null,
ApcContext: IntPtr.Zero,
IoStatusBlock: out IO_STATUS_BLOCK statusBlock,
FileInformation: _buffer.VoidPointer,
Length: (uint)_buffer.ByteCapacity,
FileInformationClass: FileInformationClass.FileFullDirectoryInformation,
ReturnSingleEntry: false,
FileName: null,
RestartScan: false);
switch (status)
{
case NTStatus.STATUS_NO_MORE_FILES:
NoMoreFiles();
return;
case NTStatus.STATUS_SUCCESS:
Debug.Assert(statusBlock.Information.ToInt64() != 0);
break;
default:
throw status.GetException();
}
}
public static void ThrowIfFailed(this NTStatus status, string path = null)
{
if (status.Failed())
{
throw status.GetException(path);
}
}
public static void Throw(this NTStatus status) => throw status.GetException();
