compress.c

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/*
 * COPYRIGHT:       See COPYING in the top level directory
 * PROJECT:         File Management IFS Utility functions
 * FILE:            reactos/dll/win32/fmifs/compress.c
 * PURPOSE:         Volume compression
 *
 * PROGRAMMERS:     Emanuele Aliberti
 */

#include "precomp.h"

/*
 * @implemented
 */
BOOLEAN NTAPI
EnableVolumeCompression(
    IN PWCHAR DriveRoot,
    IN USHORT Compression)
{
    HANDLE hFile;
    DWORD RetBytes;
    BOOL Ret;

    hFile = CreateFileW(
        DriveRoot,
        FILE_READ_DATA | FILE_WRITE_DATA,
        FILE_SHARE_READ | FILE_SHARE_WRITE,
        NULL,
        OPEN_EXISTING,
        FILE_FLAG_BACKUP_SEMANTICS,
        NULL);

    if (hFile == INVALID_HANDLE_VALUE)
        return FALSE;

    Ret = DeviceIoControl(
        hFile,
        FSCTL_SET_COMPRESSION,
        &Compression,
        sizeof(USHORT),
        NULL,
        0,
        &RetBytes,
        NULL);

    CloseHandle(hFile);

    return (Ret != 0);
}

/* EOF */