Date: Tue, 11 Jan 2000 18:54:47 -0500 From: Laurence Berland <stuyman@confusion.net> To: freebsd-questions@FreeBSD.ORG Subject: Re: Giving a sighandler more information Message-ID: <387BC2C7.44B12247@confusion.net> References: <200001111215.NAA22385@dorifer.heim3.tu-clausthal.de>
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Oliver Fromme wrote:
>
> 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
>
Does this have something to do with the signal being caught while we're
in the signal routine? Am I on the right track?
--
Laurence Berland, Stuyvesant HS Debate
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Windows 98: n.
useless extension to a minor patch release for
32-bit extensions and a graphical shell for a
16-bit patch to an 8-bit operating system
originally coded for a 4-bit microprocessor,
written by a 2-bit company that can't stand for
1 bit of competition.
http://stuy.debate.net
icq #7434346 aol imer E1101
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