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kernel32: Rely solely on the DosDevices symbolic links in QueryDosDevice. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2017-05-03 11:50:02 +02:00
parent 3fca6cd1ed
commit d23815827d
1 changed files with 4 additions and 156 deletions
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160
dlls/kernel32/volume.c
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@ -68,36 +68,6 @@ enum fs_type
FS_UDF /* For reference [E] = Ecma-167.pdf, [U] = udf260.pdf */
};
/* read a Unix symlink; returned buffer must be freed by caller */
static char *read_symlink( const char *path )
{
char *buffer;
int ret, size = 128;
for (;;)
{
if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
{
SetLastError( ERROR_NOT_ENOUGH_MEMORY );
return 0;
}
ret = readlink( path, buffer, size );
if (ret == -1)
{
FILE_SetDosError();
HeapFree( GetProcessHeap(), 0, buffer );
return 0;
}
if (ret != size)
{
buffer[ret] = 0;
return buffer;
}
HeapFree( GetProcessHeap(), 0, buffer );
size *= 2;
}
}
/* get the path of a dos device symlink in the $WINEPREFIX/dosdevices directory */
static char *get_dos_device_path( LPCWSTR name )
{
@ -1257,18 +1227,9 @@ BOOL WINAPI DefineDosDeviceA(DWORD flags, LPCSTR devname, LPCSTR targetpath)
*/
DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
{
static const WCHAR auxW[] = {'A','U','X',0};
static const WCHAR prnW[] = {'P','R','N',0};
static const WCHAR comW[] = {'C','O','M',0};
static const WCHAR lptW[] = {'L','P','T',0};
static const WCHAR com0W[] = {'\\','?','?','\\','C','O','M','0',0};
static const WCHAR com1W[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','C','O','M','1',0,0};
static const WCHAR lpt1W[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','L','P','T','1',0,0};
static const WCHAR dosdevW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
UNICODE_STRING nt_name;
ANSI_STRING unix_name;
WCHAR nt_buffer[10];
NTSTATUS status;
if (!bufsize)
@ -1279,8 +1240,7 @@ DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
if (devname)
{
WCHAR *p, name[5];
char *path, *link;
WCHAR name[8];
WCHAR *buffer;
DWORD dosdev, ret = 0;
@ -1300,72 +1260,13 @@ DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
strcatW( buffer, devname );
status = read_nt_symlink( buffer, target, bufsize );
HeapFree( GetProcessHeap(), 0, buffer );
if (!status)
{
ret = strlenW( target ) + 1;
goto done;
}
if (!dosdev) /* not a special DOS device */
if (status)
{
SetLastError( RtlNtStatusToDosError(status) );
return 0;
}
/* FIXME: should read NT symlink for all devices */
if (!(path = get_dos_device_path( name ))) return 0;
link = read_symlink( path );
HeapFree( GetProcessHeap(), 0, path );
if (link)
{
ret = MultiByteToWideChar( CP_UNIXCP, 0, link, -1, target, bufsize );
HeapFree( GetProcessHeap(), 0, link );
}
else /* look for device defaults */
{
if (!strcmpiW( name, auxW ))
{
if (bufsize >= sizeof(com1W)/sizeof(WCHAR))
{
memcpy( target, com1W, sizeof(com1W) );
ret = sizeof(com1W)/sizeof(WCHAR);
}
else SetLastError( ERROR_INSUFFICIENT_BUFFER );
return ret;
}
if (!strcmpiW( name, prnW ))
{
if (bufsize >= sizeof(lpt1W)/sizeof(WCHAR))
{
memcpy( target, lpt1W, sizeof(lpt1W) );
ret = sizeof(lpt1W)/sizeof(WCHAR);
}
else SetLastError( ERROR_INSUFFICIENT_BUFFER );
return ret;
}
nt_buffer[0] = '\\';
nt_buffer[1] = '?';
nt_buffer[2] = '?';
nt_buffer[3] = '\\';
strcpyW( nt_buffer + 4, name );
RtlInitUnicodeString( &nt_name, nt_buffer );
status = wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, TRUE );
if (status) SetLastError( RtlNtStatusToDosError(status) );
else
{
ret = MultiByteToWideChar( CP_UNIXCP, 0, unix_name.Buffer, -1, target, bufsize );
RtlFreeAnsiString( &unix_name );
}
}
done:
if (ret)
{
if (ret < bufsize) target[ret++] = 0; /* add an extra null */
for (p = target; *p; p++) if (*p == '/') *p = '\\';
}
ret = strlenW( target ) + 1;
if (ret < bufsize) target[ret++] = 0; /* add an extra null */
return ret;
}
else /* return a list of all devices */
@ -1373,59 +1274,6 @@ DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
OBJECT_ATTRIBUTES attr;
HANDLE handle;
WCHAR *p = target;
int i;
if (bufsize <= (sizeof(auxW)+sizeof(prnW))/sizeof(WCHAR))
{
SetLastError( ERROR_INSUFFICIENT_BUFFER );
return 0;
}
/* FIXME: these should be NT symlinks too */
memcpy( p, auxW, sizeof(auxW) );
p += sizeof(auxW) / sizeof(WCHAR);
memcpy( p, prnW, sizeof(prnW) );
p += sizeof(prnW) / sizeof(WCHAR);
strcpyW( nt_buffer, com0W );
RtlInitUnicodeString( &nt_name, nt_buffer );
for (i = 1; i <= 9; i++)
{
nt_buffer[7] = '0' + i;
if (!wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, TRUE ))
{
RtlFreeAnsiString( &unix_name );
if (p + 5 >= target + bufsize)
{
SetLastError( ERROR_INSUFFICIENT_BUFFER );
return 0;
}
strcpyW( p, comW );
p[3] = '0' + i;
p[4] = 0;
p += 5;
}
}
strcpyW( nt_buffer + 4, lptW );
for (i = 1; i <= 9; i++)
{
nt_buffer[7] = '0' + i;
if (!wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, TRUE ))
{
RtlFreeAnsiString( &unix_name );
if (p + 5 >= target + bufsize)
{
SetLastError( ERROR_INSUFFICIENT_BUFFER );
return 0;
}
strcpyW( p, lptW );
p[3] = '0' + i;
p[4] = 0;
p += 5;
}
}
RtlInitUnicodeString( &nt_name, dosdevW );
nt_name.Length -= sizeof(WCHAR); /* without trailing slash */