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Path: utzoo!utgpu!water!watmath!clyde!ima!haddock!karl
From: karl@haddock.UUCP
Newsgroups: comp.lang.c
Subject: Re: News for Xenix on PC AT ?
Message-ID: <463@haddock.UUCP>
Date: Tue, 28-Apr-87 12:54:23 EDT
Article-I.D.: haddock.463
Posted: Tue Apr 28 12:54:23 1987
Date-Received: Wed, 29-Apr-87 05:49:39 EDT
References: <18346@ucbvax.BERKELEY.EDU> <145@sds.UUCP>
Reply-To: karl@haddock.ISC.COM.UUCP (Karl Heuer)
Organization: Interactive Systems, Boston
Lines: 11

In article <476@unmvax.UNM.EDU> mike@turing.UUCP (Mike Bushnell) writes:
>I like to cast signal to an int before checking for -1 ...

That could still fail; consider a two's complement machine with 16-bit ints,
32-bit function pointers, and a valid function at address 0x1000ffff.

It is more correct to cast the -1 into an appropriate pointer.  Even this
isn't perfect (for several reasons), which is why ANSI has introduced the
constant SIG_ERR to compare against.

Karl W. Z. Heuer (ima!haddock!karl or karl@haddock.isc.com), The Walking Lint