Date:	Fri, 19 Jan 2001 18:09:58 -0500
Message-Id:	<200101192309.SAA17874@envy.delorie.com>
X-Authentication-Warning:	envy.delorie.com: dj set sender to dj AT envy DOT delorie DOT com using -f
From:	DJ Delorie <dj AT delorie DOT com>
To:	djgpp-workers AT delorie DOT com
In-reply-to:	<3A687DD7.834.3F21A6@localhost> (snowball3@bigfoot.com)
Subject:	Re: Where does gcc -o foo make foo.exe
References:	<3A605A7C DOT 44 DOT 7AB95C AT localhost> <3A687DD7 DOT 834 DOT 3F21A6 AT localhost>
Reply-To:	djgpp-workers AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	djgpp-workers AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

> I've gone over the binutils archives (used 'fseek zero' as search term) and 
> found that two other tries at a generic fix failed and the opinion was the 
> seek/garbage problem should not be solved in the libc library and not BFD. So 
> I don't think any patch I offer will be accepted. I think it would be better 
> to solve the problem in our own libc and available by means of some flag.

I solved it in cygwin pretty easily, but it depends on having a flag
available for each open file descriptor.

The algorithm is:

* When you seek, set a flag.

* When you write, if the flag is set, reset flag and see if you're past EOF.

* If you are past EOF, write zeros to fill the gap.

You don't want to do the "see if you're past EOF" part on *every*
write, just the ones that follow seeks.

- Raw text -