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.


VC++Files/mysys/mysys.dsp:
  added my_access
VC++Files/mysys/mysys_ia64.dsp:
  added my_access.c
include/my_sys.h:
  if on windows, we use my_access.
  if not on windows, then my_access points to the native access method
mysys/Makefile.am:
  added my_access to mysys build file
mysys/mf_pack.c:
  changed call to access to my_access
sql/sql_db.cc:
  changed call to access to my_access

1 files changed, 1 insertions, 1 deletions

diff --git a/mysys/mf_pack.c b/mysys/mf_pack.c
index 9193238708d..79b194289c6 100644
--- a/mysys/mf_pack.c
+++ b/mysys/mf_pack.c
@@ -226,7 +226,7 @@ void symdirget(char *dir)
 {
   char buff[FN_REFLEN];
   char *pos=strend(dir);
-  if (dir[0] && pos[-1] != FN_DEVCHAR && access(dir, F_OK))
+  if (dir[0] && pos[-1] != FN_DEVCHAR && !my_access(dir, F_OK))
   {
     File file;
     uint length;