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/*
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* eject_nt.cpp - cd eject routines for WinNT (derived from MS samples)
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*
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* Basilisk II (C) 1997-2004 Christian Bauer
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*
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* Windows platform specific code copyright (C) Lauri Pesonen
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sysdeps.h"
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#include "windows.h"
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#include <winioctl.h>
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// Prototypes
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extern "C" {
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#include "eject_nt.h"
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LPTSTR szVolumeFormat = TEXT("\\\\.\\%c:");
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LPTSTR szRootFormat = TEXT("%c:\\");
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LPTSTR szErrorFormat = TEXT("Error %d: %s\n");
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void ReportError(LPTSTR szMsg)
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{
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// _tprintf(szErrorFormat, GetLastError(), szMsg);
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}
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HANDLE OpenVolume(TCHAR cDriveLetter)
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{
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HANDLE hVolume;
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UINT uDriveType;
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TCHAR szVolumeName[8];
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TCHAR szRootName[5];
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DWORD dwAccessFlags;
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wsprintf(szRootName, szRootFormat, cDriveLetter);
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uDriveType = GetDriveType(szRootName);
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switch(uDriveType) {
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case DRIVE_REMOVABLE:
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dwAccessFlags = GENERIC_READ | GENERIC_WRITE;
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break;
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case DRIVE_CDROM:
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dwAccessFlags = GENERIC_READ;
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break;
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default:
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// _tprintf(TEXT("Cannot eject. Drive type is incorrect.\n"));
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return INVALID_HANDLE_VALUE;
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}
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wsprintf(szVolumeName, szVolumeFormat, cDriveLetter);
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hVolume = CreateFile( szVolumeName,
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dwAccessFlags,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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0,
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NULL );
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if (hVolume == INVALID_HANDLE_VALUE)
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ReportError(TEXT("CreateFile"));
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return hVolume;
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}
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BOOL CloseVolume(HANDLE hVolume)
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{
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return CloseHandle(hVolume);
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}
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#define LOCK_TIMEOUT 1000 // 1 second
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#define LOCK_RETRIES 20
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BOOL LockVolume(HANDLE hVolume)
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{
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DWORD dwBytesReturned;
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DWORD dwSleepAmount;
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int nTryCount;
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dwSleepAmount = LOCK_TIMEOUT / LOCK_RETRIES;
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// Do this in a loop until a timeout period has expired
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for (nTryCount = 0; nTryCount < LOCK_RETRIES; nTryCount++) {
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if (DeviceIoControl(hVolume,
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FSCTL_LOCK_VOLUME,
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NULL, 0,
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NULL, 0,
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&dwBytesReturned,
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NULL))
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return TRUE;
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Sleep(dwSleepAmount);
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}
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return FALSE;
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}
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BOOL DismountVolume(HANDLE hVolume)
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{
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DWORD dwBytesReturned;
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return DeviceIoControl( hVolume,
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FSCTL_DISMOUNT_VOLUME,
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NULL, 0,
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NULL, 0,
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&dwBytesReturned,
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NULL);
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}
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BOOL PreventRemovalOfVolume(HANDLE hVolume, BOOL fPreventRemoval)
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{
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DWORD dwBytesReturned;
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PREVENT_MEDIA_REMOVAL PMRBuffer;
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PMRBuffer.PreventMediaRemoval = fPreventRemoval;
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return DeviceIoControl( hVolume,
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IOCTL_STORAGE_MEDIA_REMOVAL,
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&PMRBuffer, sizeof(PREVENT_MEDIA_REMOVAL),
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NULL, 0,
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&dwBytesReturned,
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NULL);
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}
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BOOL AutoEjectVolume( HANDLE hVolume, BOOL reload )
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{
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DWORD dwBytesReturned;
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return DeviceIoControl( hVolume,
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reload ? IOCTL_STORAGE_LOAD_MEDIA : IOCTL_STORAGE_EJECT_MEDIA,
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NULL, 0,
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NULL, 0,
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&dwBytesReturned,
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NULL);
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}
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BOOL EjectVolume( TCHAR cDriveLetter, BOOL reload )
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{
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HANDLE hVolume;
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BOOL fRemoveSafely = FALSE;
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BOOL fAutoEject = FALSE;
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// Open the volume.
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hVolume = OpenVolume(cDriveLetter);
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if (hVolume == INVALID_HANDLE_VALUE)
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return FALSE;
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// Lock and dismount the volume.
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if (LockVolume(hVolume) && DismountVolume(hVolume)) {
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fRemoveSafely = TRUE;
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// Set prevent removal to false and eject the volume.
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if (PreventRemovalOfVolume(hVolume, FALSE) &&
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AutoEjectVolume(hVolume,reload))
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fAutoEject = TRUE;
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}
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// Close the volume so other processes can use the drive.
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if (!CloseVolume(hVolume))
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return FALSE;
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/*
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if (fAutoEject)
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printf("Media in Drive %c has been ejected safely.\n", cDriveLetter);
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else {
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if (fRemoveSafely)
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printf("Media in Drive %c can be safely removed.\n", cDriveLetter);
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}
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*/
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return TRUE;
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}
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} // extern "C"
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