Alexandre Julliard : kernel32: Read label and serial from the filesystem when the device is accessible but unknown .
Alexandre Julliard
julliard at winehq.org
Sat Dec 8 13:43:38 CST 2007
Module: wine
Branch: master
Commit: c5d63b55352f85a56e63dc0aaf5f74084de1403a
URL: http://source.winehq.org/git/wine.git/?a=commit;h=c5d63b55352f85a56e63dc0aaf5f74084de1403a
Author: Alexandre Julliard <julliard at winehq.org>
Date: Sat Dec 8 19:53:24 2007 +0100
kernel32: Read label and serial from the filesystem when the device is accessible but unknown.
---
dlls/kernel32/volume.c | 109 ++++++++++++++++++++++++++---------------------
1 files changed, 60 insertions(+), 49 deletions(-)
diff --git a/dlls/kernel32/volume.c b/dlls/kernel32/volume.c
index 7f07f56..1869d0d 100644
--- a/dlls/kernel32/volume.c
+++ b/dlls/kernel32/volume.c
@@ -161,6 +161,52 @@ static BOOL open_device_root( LPCWSTR root, HANDLE *handle )
return TRUE;
}
+/* get the label by reading it from a file at the root of the filesystem */
+static void get_filesystem_label( const WCHAR *device, WCHAR *label, DWORD len )
+{
+ HANDLE handle;
+ WCHAR labelW[] = {'A',':','\\','.','w','i','n','d','o','w','s','-','l','a','b','e','l',0};
+
+ labelW[0] = device[4];
+ handle = CreateFileW( labelW, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
+ OPEN_EXISTING, 0, 0 );
+ if (handle != INVALID_HANDLE_VALUE)
+ {
+ char buffer[256], *p;
+ DWORD size;
+
+ if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
+ CloseHandle( handle );
+ p = buffer + size;
+ while (p > buffer && (p[-1] == ' ' || p[-1] == '\r' || p[-1] == '\n')) p--;
+ *p = 0;
+ if (!MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, label, len ))
+ label[len-1] = 0;
+ }
+ else label[0] = 0;
+}
+
+/* get the serial number by reading it from a file at the root of the filesystem */
+static DWORD get_filesystem_serial( const WCHAR *device )
+{
+ HANDLE handle;
+ WCHAR serialW[] = {'A',':','\\','.','w','i','n','d','o','w','s','-','s','e','r','i','a','l',0};
+
+ serialW[0] = device[4];
+ handle = CreateFileW( serialW, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
+ OPEN_EXISTING, 0, 0 );
+ if (handle != INVALID_HANDLE_VALUE)
+ {
+ char buffer[32];
+ DWORD size;
+
+ if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
+ CloseHandle( handle );
+ buffer[size] = 0;
+ return strtoul( buffer, NULL, 16 );
+ }
+ else return 0;
+}
/* fetch the type of a drive from the registry */
static UINT get_registry_drive_type( const WCHAR *root )
@@ -256,10 +302,11 @@ static enum fs_type VOLUME_ReadFATSuperblock( HANDLE handle, BYTE *buff )
/* try a fixed disk, with a FAT partition */
if (SetFilePointer( handle, 0, NULL, FILE_BEGIN ) != 0 ||
- !ReadFile( handle, buff, SUPERBLOCK_SIZE, &size, NULL ) ||
- size != SUPERBLOCK_SIZE)
+ !ReadFile( handle, buff, SUPERBLOCK_SIZE, &size, NULL ))
return FS_ERROR;
+ if (size < SUPERBLOCK_SIZE) return FS_UNKNOWN;
+
/* FIXME: do really all FAT have their name beginning with
* "FAT" ? (At least FAT12, FAT16 and FAT32 have :)
*/
@@ -332,7 +379,7 @@ static enum fs_type VOLUME_ReadCDSuperblock( HANDLE handle, BYTE *buff )
/**************************************************************************
* VOLUME_GetSuperblockLabel
*/
-static void VOLUME_GetSuperblockLabel( enum fs_type type, const BYTE *superblock,
+static void VOLUME_GetSuperblockLabel( const WCHAR *device, enum fs_type type, const BYTE *superblock,
WCHAR *label, DWORD len )
{
const BYTE *label_ptr = NULL;
@@ -341,9 +388,11 @@ static void VOLUME_GetSuperblockLabel( enum fs_type type, const BYTE *superblock
switch(type)
{
case FS_ERROR:
- case FS_UNKNOWN:
label_len = 0;
break;
+ case FS_UNKNOWN:
+ get_filesystem_label( device, label, len );
+ return;
case FS_FAT1216:
label_ptr = superblock + 0x2b;
label_len = 11;
@@ -384,13 +433,14 @@ static void VOLUME_GetSuperblockLabel( enum fs_type type, const BYTE *superblock
/**************************************************************************
* VOLUME_GetSuperblockSerial
*/
-static DWORD VOLUME_GetSuperblockSerial( enum fs_type type, const BYTE *superblock )
+static DWORD VOLUME_GetSuperblockSerial( const WCHAR *device, enum fs_type type, const BYTE *superblock )
{
switch(type)
{
case FS_ERROR:
- case FS_UNKNOWN:
break;
+ case FS_UNKNOWN:
+ return get_filesystem_serial( device );
case FS_FAT1216:
return GETLONG( superblock, 0x27 );
case FS_FAT32:
@@ -519,8 +569,8 @@ BOOL WINAPI GetVolumeInformationW( LPCWSTR root, LPWSTR label, DWORD label_len,
TRACE( "%s: found fs type %d\n", debugstr_w(device), type );
if (type == FS_ERROR) return FALSE;
- if (label && label_len) VOLUME_GetSuperblockLabel( type, superblock, label, label_len );
- if (serial) *serial = VOLUME_GetSuperblockSerial( type, superblock );
+ if (label && label_len) VOLUME_GetSuperblockLabel( device, type, superblock, label, label_len );
+ if (serial) *serial = VOLUME_GetSuperblockSerial( device, type, superblock );
goto fill_fs_info;
}
else TRACE( "cannot open device %s: err %d\n", debugstr_w(device), GetLastError() );
@@ -544,47 +594,8 @@ BOOL WINAPI GetVolumeInformationW( LPCWSTR root, LPWSTR label, DWORD label_len,
break;
}
- if (label && label_len)
- {
- WCHAR labelW[] = {'A',':','\\','.','w','i','n','d','o','w','s','-','l','a','b','e','l',0};
-
- labelW[0] = device[4];
- handle = CreateFileW( labelW, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
- OPEN_EXISTING, 0, 0 );
- if (handle != INVALID_HANDLE_VALUE)
- {
- char buffer[256], *p;
- DWORD size;
-
- if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
- CloseHandle( handle );
- p = buffer + size;
- while (p > buffer && (p[-1] == ' ' || p[-1] == '\r' || p[-1] == '\n')) p--;
- *p = 0;
- if (!MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, label, label_len ))
- label[label_len-1] = 0;
- }
- else label[0] = 0;
- }
- if (serial)
- {
- WCHAR serialW[] = {'A',':','\\','.','w','i','n','d','o','w','s','-','s','e','r','i','a','l',0};
-
- serialW[0] = device[4];
- handle = CreateFileW( serialW, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
- OPEN_EXISTING, 0, 0 );
- if (handle != INVALID_HANDLE_VALUE)
- {
- char buffer[32];
- DWORD size;
-
- if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
- CloseHandle( handle );
- buffer[size] = 0;
- *serial = strtoul( buffer, NULL, 16 );
- }
- else *serial = 0;
- }
+ if (label && label_len) get_filesystem_label( device, label, label_len );
+ if (serial) *serial = get_filesystem_serial( device );
fill_fs_info: /* now fill in the information that depends on the file system type */
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