mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 08:08:38 +00:00
135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/*
|
|
* FreeLoader - volume.c
|
|
*
|
|
* Copyright (C) 2001 Brian Palmer <brianp@sginet.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <windows.h>
|
|
#include <stdio.h>
|
|
#include <tchar.h>
|
|
#include "volume.h"
|
|
|
|
static HANDLE hDiskVolume = NULL;
|
|
|
|
BOOL OpenVolume(LPCTSTR lpszVolumeName)
|
|
{
|
|
TCHAR RealVolumeName[MAX_PATH];
|
|
|
|
//
|
|
// If they passed in a drive letter (e.g. "A:")
|
|
// then try to open the physical device volume,
|
|
// otherwise we will assume it is a disk image
|
|
// file they are writing to. (not fully supported yet)
|
|
//
|
|
if ((_tcslen(lpszVolumeName) == 2) && (lpszVolumeName[1] == _T(':')))
|
|
{
|
|
_tcscpy(RealVolumeName, _T("\\\\.\\"));
|
|
_tcscat(RealVolumeName, lpszVolumeName);
|
|
}
|
|
else
|
|
{
|
|
_tcscpy(RealVolumeName, lpszVolumeName);
|
|
}
|
|
|
|
_tprintf(_T("Opening volume \'%s\'\n"), lpszVolumeName);
|
|
|
|
hDiskVolume = CreateFile(RealVolumeName,
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
0,
|
|
NULL);
|
|
|
|
if (hDiskVolume == INVALID_HANDLE_VALUE)
|
|
{
|
|
_tprintf(_T("%s:%d: "), __FILE__, __LINE__);
|
|
_tprintf(_T("Failed. Error code %ld.\n"), GetLastError());
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void CloseVolume(void)
|
|
{
|
|
CloseHandle(hDiskVolume);
|
|
}
|
|
|
|
BOOL ReadVolumeSector(ULONG SectorNumber, PVOID SectorBuffer)
|
|
{
|
|
DWORD dwNumberOfBytesRead;
|
|
DWORD dwFilePosition;
|
|
BOOL bRetVal;
|
|
|
|
//
|
|
// FIXME: this doesn't seem to handle the situation
|
|
// properly when SectorNumber is bigger than the
|
|
// amount of sectors on the disk. Seems to me that
|
|
// the call to SetFilePointer() should just give an
|
|
// out of bounds error or something but it doesn't.
|
|
//
|
|
dwFilePosition = SetFilePointer(hDiskVolume, (SectorNumber * 512), NULL, FILE_BEGIN);
|
|
if (dwFilePosition != (SectorNumber * 512))
|
|
{
|
|
_tprintf(_T("%s:%d: "), __FILE__, __LINE__);
|
|
_tprintf(_T("SetFilePointer() failed. Error code %ld.\n"), GetLastError());
|
|
return FALSE;
|
|
}
|
|
|
|
bRetVal = ReadFile(hDiskVolume, SectorBuffer, 512, &dwNumberOfBytesRead, NULL);
|
|
if (!bRetVal || (dwNumberOfBytesRead != 512))
|
|
{
|
|
_tprintf(_T("%s:%d: "), __FILE__, __LINE__);
|
|
_tprintf(_T("ReadFile() failed. Error code %ld.\n"), GetLastError());
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL WriteVolumeSector(ULONG SectorNumber, PVOID SectorBuffer)
|
|
{
|
|
DWORD dwNumberOfBytesWritten;
|
|
DWORD dwFilePosition;
|
|
BOOL bRetVal;
|
|
|
|
//
|
|
// FIXME: this doesn't seem to handle the situation
|
|
// properly when SectorNumber is bigger than the
|
|
// amount of sectors on the disk. Seems to me that
|
|
// the call to SetFilePointer() should just give an
|
|
// out of bounds error or something but it doesn't.
|
|
//
|
|
dwFilePosition = SetFilePointer(hDiskVolume, (SectorNumber * 512), NULL, FILE_BEGIN);
|
|
if (dwFilePosition != (SectorNumber * 512))
|
|
{
|
|
_tprintf(_T("%s:%d: "), __FILE__, __LINE__);
|
|
_tprintf(_T("SetFilePointer() failed. Error code %ld.\n"), GetLastError());
|
|
return FALSE;
|
|
}
|
|
|
|
bRetVal = WriteFile(hDiskVolume, SectorBuffer, 512, &dwNumberOfBytesWritten, NULL);
|
|
if (!bRetVal || (dwNumberOfBytesWritten != 512))
|
|
{
|
|
_tprintf(_T("%s:%d: "), __FILE__, __LINE__);
|
|
_tprintf(_T("WriteFile() failed. Error code %ld.\n"), GetLastError());
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|