Path: utzoo!attcan!uunet!pdn!tscs!tct!chip
From: chip@tct.uucp (Chip Salzenberg)
Newsgroups: comp.lang.perl
Subject: Re: Signal handling...
Message-ID: <260A2F16.3807@tct.uucp>
Date: 23 Mar 90 14:13:41 GMT
References: <1990Mar21.173423.7281@eci386.uucp> <100773@convex.convex.com>
Organization: ComDev/TCT, Sarasota, FL
Lines: 19

Chris Lewis writes:
>>	if (signal(SIGINT, SIG_IGN) == SIG_DFL)
>>	    signal(SIGINT, &myhandler);

According to tchrist@convex.COM (Tom Christiansen):
>Isn't this for people who don't have shells with job control and
>whose background jobs still get keyboard interrupts?

This idiom is for people who don't have kernels with signal masks.
Job control and signal masks are separate features.  With a signal
mask, you can set to catch a signal and still be protected from that
signal.  Without a signal mask, setting up the catcher opens you up to
the signal you're trying to catch.

Which reminds me...  does Perl attempt signal mask manipulation?
I suppose syscall() and vec() can handle it...
-- 
Chip Salzenberg at ComDev/TCT   <chip%tct@ateng.com>, <uunet!ateng!tct!chip>
          "The Usenet, in a very real sense, does not exist."