Date: Tue, 11 Jan 2000 13:15:43 +0100 (CET) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-questions@FreeBSD.ORG Subject: Re: Giving a sighandler more information Message-ID: <200001111215.NAA22385@dorifer.heim3.tu-clausthal.de> In-Reply-To: <85e7ll$1hto$1@atlantis.rz.tu-clausthal.de>
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Laurence Berland <stuyman@confusion.net> wrote in list.freebsd-questions:
> Oliver Fromme wrote:
>>
>> I'm afraid there is no other way than using global variables.
>> Be sure to declare them as ``volatile sig_atomic_t''.
>>
> What does this do as compared to declaring them normally?
It makes them work, as opposed to not work. :-)
Seriously. You _must_ declare global variables which are
accessed from a signal handler as ``volatile sig_atomic_t''.
Everything else is _not_ guaranteed to work (and if it works,
then it's just pure luck).
Regards
Oliver
--
Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany
(Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de)
"In jedem Stück Kohle wartet ein Diamant auf seine Geburt"
(Terry Pratchett)
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