Date: Wed, 31 Jan 1996 13:47:05 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: paul@sfe.com.au (Paul Hatchman) Cc: leisner@sdsp.mc.xerox.com, linux-kernel@vger.rutgers.edu, hackers@FreeBSD.ORG Subject: Re: signal masks and select Message-ID: <199601312047.NAA10480@phaeton.artisoft.com> In-Reply-To: <199601310749.AA28625@rex.sfe.com.au> from "Paul Hatchman" at Jan 31, 96 06:49:00 pm
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>
> This can be "solved" by using setjmp/longjmp with select.
> ie
> if (setjmp (env, 1) == 0)
> {
> set_sigmask(unblock desired signals)
> select(...)
> }
>
> and your signal handler does a longjmp (env)
>
> There are drawbacks to this.. If you want to unblock signals outside of the
> select, you must keep extra state information around, so that the signal handler
> knows whether to do a normal return or a longjmp.
>
> May not be elegant, but it is surely better than using non portable methods.
> Actually is this truely portable? Will all unicies support longjmp from a
> signal handler?
sigaction should be portable to all POSIX platforms.
siginterrupt should be portable to all BSD platforms starting with 4.2
Ultrix.
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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