Date: Thu, 9 Sep 1999 22:02:05 +0100 From: Ben Smithurst <ben@scientia.demon.co.uk> To: "Andy V. Oleynik" <andyo@prime.net.ua> Cc: freebsd-stable@freebsd.org Subject: Re: fclose(NULL) - 2 versions of FBSD & cc & 2 different behavours Message-ID: <19990909220205.A31044@lithium.scientia.demon.co.uk> In-Reply-To: <37D8124F.470722F9@prime.net.ua> References: <37D8124F.470722F9@prime.net.ua>
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Andy V. Oleynik wrote:
> A lot of time ago my collegue wrote the c-prog intended to be ran
> as cgi script. He did mistake in prog:
> to check that file existed he opened it with fopen (why not access I
> didnt
> understand :) and after some action closed it with fclose. Upon
> some condition as I said the file might not existed. So prog did
> fclose(NULL) in fact. Now interesting thing. On the 2.2.7-R systems
> having been compiled with 2.7.2.1 it never been crashed. But on
> 3.2-S recently cvsupped & makeworlded latly having been compiled
> with cc 2.7.2.3 it crashes with 10 SIG (as expected I beleave).
> Somebody have a words of wisdom?
*sigh* Did you think about reading the manual?
NOTES
fclose() does not handle NULL arguments; they will result in a segmenta-
tion violation. This is intentional - it makes it easier to make sure
programs written under FreeBSD are bug free. This behaviour is an imple-
mentation detail, and programs should not rely upon it.
--
Ben Smithurst | PGP: 0x99392F7D
ben@scientia.demon.co.uk | key available from keyservers and
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