/*
 *  ReactOS kernel
 *  Copyright (C) 2002 ReactOS Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
/*
 * COPYRIGHT:       See COPYING in the top level directory
 * PROJECT:         ReactOS text-mode setup
 * FILE:            base/setup/usetup/drivesup.c
 * PURPOSE:         Drive support functions
 * PROGRAMMER:      Eric Kohl
 */

/* INCLUDES *****************************************************************/

#include "usetup.h"

#define NDEBUG
#include <debug.h>

/* FUNCTIONS ****************************************************************/

NTSTATUS
GetSourcePaths(
    PUNICODE_STRING SourcePath,
    PUNICODE_STRING SourceRootPath,
    PUNICODE_STRING SourceRootDir)
{
    OBJECT_ATTRIBUTES ObjectAttributes;
    UNICODE_STRING LinkName;
    UNICODE_STRING SourceName;
    WCHAR SourceBuffer[MAX_PATH] = {L'\0'};
    HANDLE Handle;
    NTSTATUS Status;
    ULONG Length;
    PWCHAR Ptr;

    RtlInitUnicodeString(&LinkName,
                         L"\\SystemRoot");

    InitializeObjectAttributes(&ObjectAttributes,
                               &LinkName,
                               OBJ_CASE_INSENSITIVE,
                               NULL,
                               NULL);

    Status = NtOpenSymbolicLinkObject(&Handle,
                                      SYMBOLIC_LINK_ALL_ACCESS,
                                      &ObjectAttributes);
    if (!NT_SUCCESS(Status))
        return Status;

    SourceName.Length = 0;
    SourceName.MaximumLength = MAX_PATH * sizeof(WCHAR);
    SourceName.Buffer = SourceBuffer;

    Status = NtQuerySymbolicLinkObject(Handle,
                                       &SourceName,
                                       &Length);
    NtClose(Handle);

    if (NT_SUCCESS(Status))
    {
        RtlCreateUnicodeString(SourcePath,
                               SourceName.Buffer);

        /* strip trailing directory */
        Ptr = wcsrchr(SourceName.Buffer, L'\\');
        if (Ptr)
        {
            RtlCreateUnicodeString(SourceRootDir, Ptr);
            *Ptr = 0;
        }
        else
            RtlCreateUnicodeString(SourceRootDir, L"");

        RtlCreateUnicodeString(SourceRootPath,
                               SourceName.Buffer);
    }

    NtClose(Handle);

    return STATUS_SUCCESS;
}

/* EOF */