dll/win32/fmifs/compress.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         File Management IFS Utility functions
   4  * FILE:            reactos/dll/win32/fmifs/compress.c
   5  * PURPOSE:         Volume compression
   6  *
   7  * PROGRAMMERS:     Emanuele Aliberti
   8  */
   9
  10 #include "precomp.h"
  11
  12 /*
  13  * @implemented
  14  */
  15 BOOLEAN
  16 NTAPI
  17 EnableVolumeCompression(
  18     IN PWCHAR DriveRoot,
  19     IN USHORT Compression)
  20 {
  21     HANDLE hFile;
  22     DWORD RetBytes;
  23     BOOL Ret;
  24
  25     hFile = CreateFileW(DriveRoot,
  26                         FILE_READ_DATA | FILE_WRITE_DATA,
  27                         FILE_SHARE_READ | FILE_SHARE_WRITE,
  28                         NULL,
  29                         OPEN_EXISTING,
  30                         FILE_FLAG_BACKUP_SEMANTICS,
  31                         NULL);
  32     if (hFile == INVALID_HANDLE_VALUE)
  33         return FALSE;
  34
  35     Ret = DeviceIoControl(hFile,
  36                           FSCTL_SET_COMPRESSION,
  37                           &Compression,
  38                           sizeof(USHORT),
  39                           NULL,
  40                           0,
  41                           &RetBytes,
  42                           NULL);
  43
  44     CloseHandle(hFile);
  45
  46     return (Ret != 0);
  47 }
  48
  49 /* EOF */