mariadb/mysys/my_access.c
reggie@mdk10.(none) 48c584537d BUG# 9148: Denial of service
The problem was that on Windows the access method indicates that access to file 
such as "com1" and "lpt1" is allowed (since they are device names) and
this causes mysql to attempt to open them as databases or tables.

The fix was to write our own my_access method that uses other Win32 functions
to determine if the given argument is indeed a file and has to requested
mode.
2005-05-20 16:04:10 -05:00

53 lines
1.5 KiB
C

/* Copyright (C) 2000 MySQL AB
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 "mysys_priv.h"
#ifdef __WIN__
/*
* Check a file or path for accessability.
*
* SYNOPSIS
* file_access()
* pathpath to check
* amodemode to check
*
* DESCRIPTION
* This function wraps the normal access method because the access
* available in MSVCRT> +reports that filenames such as LPT1 and
* COM1 are valid (they are but should not be so for us).
*
* RETURN VALUES
* 0 ok
* -1 error
*/
int my_access(const char *path, int amode)
{
WIN32_FILE_ATTRIBUTE_DATA fileinfo;
BOOL result;
result = GetFileAttributesEx(path, GetFileExInfoStandard,
&fileinfo);
if (! result)
return -1;
if ((fileinfo.dwFileAttributes & FILE_ATTRIBUTE_READONLY) &&
(amode & 2))
return -1;
return 0;
}
#endif