[1200] in linux-net channel archive
Re: select: strange behaviour
daemon@ATHENA.MIT.EDU (Alan Cox)
Wed Oct 11 11:05:33 1995
From: Alan Cox <alan@cymru.net>
To: norbert@taz.de (Norbert Thies)
Date: Tue, 10 Oct 1995 09:45:20 +0100 (BST)
Cc: linux-net@vger.rutgers.edu
In-Reply-To: <Pine.SV4.3.91.951009093146.23127A-100000@mogli> from "Norbert Thies" at Oct 9, 95 09:47:00 am
> The following code fragment may document it:
>
> struct timeval tv;
> tv.tv_sec = 1;
> tv.tv_usec = 0;
> select ( 0, 0, 0, 0, &tv );
>
> After the timeout has expired, tv.tv_sec == 0,
> ie. the value of 'tv' has been changed in 'select'.
> Since all other *IX systems I tried, do preserve
> the original value it breaks code (actually: archie-1.4.1).
>
> Do you consider this behaviour a feature or is it a bug?
Read the original BSD manual page. It explicitly states that a future
version of select may update the timer value. The BSD people never got
around to finishing the job. Linux did.
Alan
