Sender: nate AT cartsys DOT com
Message-ID: <373C9538.C8FD838@cartsys.com>
Date: Fri, 14 May 1999 14:27:20 -0700
From: Nate Eldredge <nate AT cartsys DOT com>
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To: djgpp AT delorie DOT com
Subject: Re: GetShortPathName() or DLL support
References: <Pine DOT SUN DOT 3 DOT 91 DOT 990513155951 DOT 12629J-100000 AT is> <373B5F02 DOT 6D1E949B AT unb DOT ca>
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Reply-To: djgpp AT delorie DOT com

Endlisnis wrote:
> 
> Eli Zaretskii wrote:
> 
> > On Wed, 12 May 1999, Edward F. Sowell wrote:
> > > MFC has a GetShortPathName() function that, obviously, converts a
> > > path with long file names, spaces, etc to the 8.3 format. This is
> > > often needed because some functions don't accept the funny file
> > > names... e.g., spawnxx().
> >
> > You don't need this in DJGPP: when you call `spawnXX', the DJGPP
> > version automatically converts the long file name to the short one
> > before passing it to DOS.
> 
>     That's not really 100% true.  I haven't checked, but I'm guessing that
> spawnXX just truncates to 8.3 format.  What about NameNumericTail?  Also,
> there are ways to convince DOS 7.x to make a 8.3 filename that isn't just a
> simple truncation or a numeric tail of a long filename.  I don't think spawnXX
> would work under these conditions.

Perhaps you should consider checking before posting random
speculations.  Around line 180 of src/libc/dos/process/dosexec.c is a
call to the DOS function to find the short alias of a long name.

If you can devise an exploit where spawn fails, I'm sure djgpp-workers
would like to know about it.
-- 

Nate Eldredge
nate AT cartsys DOT com