Path: utzoo!mnetor!uunet!husc6!hao!oddjob!gargoyle!ihnp4!ihdev!pdg
From: pdg@ihdev.ATT.COM (Joe Isuzu)
Newsgroups: comp.unix.wizards
Subject: Re: Is process <n> alive?
Message-ID: <614@ihdev.ATT.COM>
Date: 16 Dec 87 22:39:16 GMT
References: <1454@rtech.UUCP> <1921@munnari.oz> <429@minya.UUCP>
Reply-To: pdg@ihdev.UUCP (Joe Isuzu)
Organization: League of Crafty Hackers
Lines: 10

All of these answers about kill(0,procid) to probe are almost correct.
Various flavours of UNIX will return success for a probe of a zombie
(sys Vr0, BSD, amdahl UTS to name a few), while others (SysVrX (X>=2))
will return ESRCH.  I'm not sure how important this is, but someone is
sure to get caught by this sometime.

-- 

Paul Guthrie		Zippy the Pinhead - Zen for the American masses
ihnp4!ihdev!pdg				    -- me.