Windows/cdenable/eject_nt.cpp

/*
 *  eject_nt.cpp - cd eject routines for WinNT (derived from MS samples)
 *
 *  Basilisk II (C) 1997-2005 Christian Bauer
 *
 *  Windows platform specific code copyright (C) Lauri Pesonen
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "sysdeps.h"

#include "windows.h"
#include <winioctl.h>

// Prototypes

extern "C" {

#include "eject_nt.h"

LPTSTR szVolumeFormat = TEXT("\\\\.\\%c:");
LPTSTR szRootFormat = TEXT("%c:\\");
LPTSTR szErrorFormat = TEXT("Error %d: %s\n");

void ReportError(LPTSTR szMsg)
{
   // _tprintf(szErrorFormat, GetLastError(), szMsg);
}

HANDLE OpenVolume(TCHAR cDriveLetter)
{
   HANDLE hVolume;
   UINT uDriveType;
   TCHAR szVolumeName[8];
   TCHAR szRootName[5];
   DWORD dwAccessFlags;

   wsprintf(szRootName, szRootFormat, cDriveLetter);

   uDriveType = GetDriveType(szRootName);
   switch(uDriveType) {
   case DRIVE_REMOVABLE:
       dwAccessFlags = GENERIC_READ | GENERIC_WRITE;
       break;
   case DRIVE_CDROM:
       dwAccessFlags = GENERIC_READ;
       break;
   default:
       // _tprintf(TEXT("Cannot eject.  Drive type is incorrect.\n"));
       return INVALID_HANDLE_VALUE;
   }

   wsprintf(szVolumeName, szVolumeFormat, cDriveLetter);

   hVolume = CreateFile(   szVolumeName,
                           dwAccessFlags,
                           FILE_SHARE_READ | FILE_SHARE_WRITE,
                           NULL,
                           OPEN_EXISTING,
                           0,
                           NULL );
   if (hVolume == INVALID_HANDLE_VALUE)
       ReportError(TEXT("CreateFile"));

   return hVolume;
}

BOOL CloseVolume(HANDLE hVolume)
{
   return CloseHandle(hVolume);
}

#define LOCK_TIMEOUT        1000       // 1 second
#define LOCK_RETRIES        20

BOOL LockVolume(HANDLE hVolume)
{
   DWORD dwBytesReturned;
   DWORD dwSleepAmount;
   int nTryCount;

   dwSleepAmount = LOCK_TIMEOUT / LOCK_RETRIES;

   // Do this in a loop until a timeout period has expired
   for (nTryCount = 0; nTryCount < LOCK_RETRIES; nTryCount++) {
       if (DeviceIoControl(hVolume,
                           FSCTL_LOCK_VOLUME,
                           NULL, 0,
                           NULL, 0,
                           &dwBytesReturned,
                           NULL))
           return TRUE;

       Sleep(dwSleepAmount);
   }

   return FALSE;
}

BOOL DismountVolume(HANDLE hVolume)
{
   DWORD dwBytesReturned;

   return DeviceIoControl( hVolume,
                           FSCTL_DISMOUNT_VOLUME,
                           NULL, 0,
                           NULL, 0,
                           &dwBytesReturned,
                           NULL);
}

BOOL PreventRemovalOfVolume(HANDLE hVolume, BOOL fPreventRemoval)
{
   DWORD dwBytesReturned;
   PREVENT_MEDIA_REMOVAL PMRBuffer;

   PMRBuffer.PreventMediaRemoval = fPreventRemoval;

   return DeviceIoControl( hVolume,
                           IOCTL_STORAGE_MEDIA_REMOVAL,
                           &PMRBuffer, sizeof(PREVENT_MEDIA_REMOVAL),
                           NULL, 0,
                           &dwBytesReturned,
                           NULL);
}

BOOL AutoEjectVolume( HANDLE hVolume, BOOL reload )
{
   DWORD dwBytesReturned;

   return DeviceIoControl( hVolume,
                           reload ? IOCTL_STORAGE_LOAD_MEDIA : IOCTL_STORAGE_EJECT_MEDIA,
                           NULL, 0,
                           NULL, 0,
                           &dwBytesReturned,
                           NULL);
}

BOOL EjectVolume( TCHAR cDriveLetter, BOOL reload )
{
   HANDLE hVolume;

   BOOL fRemoveSafely = FALSE;
   BOOL fAutoEject = FALSE;

   // Open the volume.
   hVolume = OpenVolume(cDriveLetter);
   if (hVolume == INVALID_HANDLE_VALUE)
       return FALSE;

   // Lock and dismount the volume.
   if (LockVolume(hVolume) && DismountVolume(hVolume)) {
       fRemoveSafely = TRUE;

       // Set prevent removal to false and eject the volume.
       if (PreventRemovalOfVolume(hVolume, FALSE) &&
           AutoEjectVolume(hVolume,reload))
           fAutoEject = TRUE;
   }

   // Close the volume so other processes can use the drive.
   if (!CloseVolume(hVolume))
       return FALSE;

   /*
         if (fAutoEject)
       printf("Media in Drive %c has been ejected safely.\n", cDriveLetter);
   else {
       if (fRemoveSafely)
           printf("Media in Drive %c can be safely removed.\n", cDriveLetter);
   }
         */

   return TRUE;
}

} // extern "C"
Revision:	1.3
Committed:	2005-01-30T21:42:15Z (19 years, 9 months ago) by gbeauche
Branch:	MAIN
CVS Tags:	nigel-build-19, nigel-build-17
Changes since 1.2:	+1 -1 lines
Log Message:	Happy New Year!
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* eject_nt.cpp - cd eject routines for WinNT (derived from MS samples)
3			*
4	gbeauche	1.3	* Basilisk II (C) 1997-2005 Christian Bauer
5	gbeauche	1.1	*
6			* Windows platform specific code copyright (C) Lauri Pesonen
7			*
8			* This program is free software; you can redistribute it and/or modify
9			* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation; either version 2 of the License, or
11			* (at your option) any later version.
12			*
13			* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17			*
18			* You should have received a copy of the GNU General Public License
19			* along with this program; if not, write to the Free Software
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21			*/
22
23			#include "sysdeps.h"
24
25			#include "windows.h"
26			#include <winioctl.h>
27
28			// Prototypes
29
30			extern "C" {
31
32			#include "eject_nt.h"
33
34			LPTSTR szVolumeFormat = TEXT("\\\\.\\%c:");
35			LPTSTR szRootFormat = TEXT("%c:\\");
36			LPTSTR szErrorFormat = TEXT("Error %d: %s\n");
37
38			void ReportError(LPTSTR szMsg)
39			{
40			// _tprintf(szErrorFormat, GetLastError(), szMsg);
41			}
42
43			HANDLE OpenVolume(TCHAR cDriveLetter)
44			{
45			HANDLE hVolume;
46			UINT uDriveType;
47			TCHAR szVolumeName[8];
48			TCHAR szRootName[5];
49			DWORD dwAccessFlags;
50
51			wsprintf(szRootName, szRootFormat, cDriveLetter);
52
53			uDriveType = GetDriveType(szRootName);
54			switch(uDriveType) {
55			case DRIVE_REMOVABLE:
56			dwAccessFlags = GENERIC_READ \| GENERIC_WRITE;
57			break;
58			case DRIVE_CDROM:
59			dwAccessFlags = GENERIC_READ;
60			break;
61			default:
62			// _tprintf(TEXT("Cannot eject. Drive type is incorrect.\n"));
63			return INVALID_HANDLE_VALUE;
64			}
65
66			wsprintf(szVolumeName, szVolumeFormat, cDriveLetter);
67
68			hVolume = CreateFile( szVolumeName,
69			dwAccessFlags,
70			FILE_SHARE_READ \| FILE_SHARE_WRITE,
71			NULL,
72			OPEN_EXISTING,
73			0,
74			NULL );
75			if (hVolume == INVALID_HANDLE_VALUE)
76			ReportError(TEXT("CreateFile"));
77
78			return hVolume;
79			}
80
81			BOOL CloseVolume(HANDLE hVolume)
82			{
83			return CloseHandle(hVolume);
84			}
85
86			#define LOCK_TIMEOUT 1000 // 1 second
87			#define LOCK_RETRIES 20
88
89			BOOL LockVolume(HANDLE hVolume)
90			{
91			DWORD dwBytesReturned;
92			DWORD dwSleepAmount;
93			int nTryCount;
94
95			dwSleepAmount = LOCK_TIMEOUT / LOCK_RETRIES;
96
97			// Do this in a loop until a timeout period has expired
98			for (nTryCount = 0; nTryCount < LOCK_RETRIES; nTryCount++) {
99			if (DeviceIoControl(hVolume,
100			FSCTL_LOCK_VOLUME,
101			NULL, 0,
102			NULL, 0,
103			&dwBytesReturned,
104			NULL))
105			return TRUE;
106
107			Sleep(dwSleepAmount);
108			}
109
110			return FALSE;
111			}
112
113			BOOL DismountVolume(HANDLE hVolume)
114			{
115			DWORD dwBytesReturned;
116
117			return DeviceIoControl( hVolume,
118			FSCTL_DISMOUNT_VOLUME,
119			NULL, 0,
120			NULL, 0,
121			&dwBytesReturned,
122			NULL);
123			}
124
125			BOOL PreventRemovalOfVolume(HANDLE hVolume, BOOL fPreventRemoval)
126			{
127			DWORD dwBytesReturned;
128			PREVENT_MEDIA_REMOVAL PMRBuffer;
129
130			PMRBuffer.PreventMediaRemoval = fPreventRemoval;
131
132			return DeviceIoControl( hVolume,
133			IOCTL_STORAGE_MEDIA_REMOVAL,
134			&PMRBuffer, sizeof(PREVENT_MEDIA_REMOVAL),
135			NULL, 0,
136			&dwBytesReturned,
137			NULL);
138			}
139
140			BOOL AutoEjectVolume( HANDLE hVolume, BOOL reload )
141			{
142			DWORD dwBytesReturned;
143
144			return DeviceIoControl( hVolume,
145			reload ? IOCTL_STORAGE_LOAD_MEDIA : IOCTL_STORAGE_EJECT_MEDIA,
146			NULL, 0,
147			NULL, 0,
148			&dwBytesReturned,
149			NULL);
150			}
151
152			BOOL EjectVolume( TCHAR cDriveLetter, BOOL reload )
153			{
154			HANDLE hVolume;
155
156			BOOL fRemoveSafely = FALSE;
157			BOOL fAutoEject = FALSE;
158
159			// Open the volume.
160			hVolume = OpenVolume(cDriveLetter);
161			if (hVolume == INVALID_HANDLE_VALUE)
162			return FALSE;
163
164			// Lock and dismount the volume.
165			if (LockVolume(hVolume) && DismountVolume(hVolume)) {
166			fRemoveSafely = TRUE;
167
168			// Set prevent removal to false and eject the volume.
169			if (PreventRemovalOfVolume(hVolume, FALSE) &&
170			AutoEjectVolume(hVolume,reload))
171			fAutoEject = TRUE;
172			}
173
174			// Close the volume so other processes can use the drive.
175			if (!CloseVolume(hVolume))
176			return FALSE;
177
178			/*
179			if (fAutoEject)
180			printf("Media in Drive %c has been ejected safely.\n", cDriveLetter);
181			else {
182			if (fRemoveSafely)
183			printf("Media in Drive %c can be safely removed.\n", cDriveLetter);
184			}
185			*/
186
187			return TRUE;
188			}
189
190			} // extern "C"