public static NT_FILE_STANDARD_INFORMATION GetFileInfo_standard(IntPtr file_handle)
{
IntPtr ret_ptr = IntPtr.Zero;
try
{
IO_STATUS_BLOCK status_block = new IO_STATUS_BLOCK();
int ret_len = Marshal.SizeOf(typeof(NT_FILE_STANDARD_INFORMATION));
ret_ptr = Marshal.AllocHGlobal(ret_len);
uint res = ntApiFS.NtQueryInformationFile
(file_handle,
ref status_block,
ret_ptr,
ret_len,
FILE_INFORMATION_CLASS.FileStandardInformation);
NTSTATUS_helper.ThrowOnError(res, status_block, NTSTATUS_severity.Warning);
NT_FILE_STANDARD_INFORMATION ret = (NT_FILE_STANDARD_INFORMATION)Marshal.PtrToStructure
(ret_ptr,
typeof(NT_FILE_STANDARD_INFORMATION));
return(ret);
}
finally
{
if (ret_ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(ret_ptr);
}
}
}
public static NT_FILE_STANDARD_INFORMATION GetFileInfo_standard(string file_name)
{
IntPtr file_handle = IntPtr.Zero;
try
{
file_handle = WinApiFS.CreateFile_intptr
(file_name,
Win32FileAccess.GENERIC_READ,
FileShare.ReadWrite,
IntPtr.Zero,
FileMode.Open,
CreateFileOptions.None,
IntPtr.Zero);
if (file_handle.ToInt32() == WinApiFS.INVALID_HANDLE_VALUE)
{
int win_err = Marshal.GetLastWin32Error();
Exception ex = new Win32Exception(win_err);
throw ex;
}
NT_FILE_STANDARD_INFORMATION ret = GetFileInfo_standard(file_handle);
return(ret);
}
finally
{
if ((file_handle != IntPtr.Zero) && (file_handle.ToInt32() != WinApiFS.INVALID_HANDLE_VALUE))
{
WinApiFS.CloseHandle(file_handle);
}
}
}
