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Article #1826

Re: zombies (was Re: What does a task with priority -1 mean?)

#1826
From: Heiko W.Rupp
Date: Tue, 17 Nov 1992 17:32
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[ Distribution usa as on Ray's article does not work - besides why do ]
[ you want people outside usa not to get your articles?               ]


cc100aa@xray.gatech.edu (Ray Spalding) writes:
>To avoid zombies, a UNIX process doing a fork (a parent process)
>must reap it's child(ren).  This is done by some varient of the
>wait(2) system call, and it may be helpful to install a SIGCHLD
>handler.  The man pages seem to imply that wait() is an optional
>feature, but failure to call it will result in a zombie.

I think this description isn't quite correct, but I may be wrong: You
only get a zombie, when the parent exits without wait(2)ing for its
childs. When you can be shure, that the children die before the
parent, you don't need to wait(2), but you may for other reasons.
-- 
Heiko W.Rupp  Gerwigstr.5  7500 Kh'e 1  hwr@pilhuhn.ka.sub.org  +49 721 693642
When the weight of the paperwork equals the weight of the plane, the
plane will fly.
		-- Donald Douglas
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Message-ID: <1992Nov17.173236.11953@pilhuhn.ka.sub.org>
Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!ibmpcug!exnet2!flatlin!pilhuhn!hwr
References: <1dmp94INNppe@uwm.edu> <1992Nov10.152955.21859@menudo.uh.edu> <10NOV199210153953@mpx2.lampf.lanl.gov> <74594@hydra.gatech.EDU>

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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!ibmpcug!exnet2!flatlin!pilhuhn!hwr
From: hwr@pilhuhn.ka.sub.org (Heiko W.Rupp)
Subject: Re: zombies (was Re: What does a task with priority -1 mean?)
References: <1dmp94INNppe@uwm.edu> <1992Nov10.152955.21859@menudo.uh.edu> <10NOV199210153953@mpx2.lampf.lanl.gov> <74594@hydra.gatech.EDU>
Date: Tue, 17 Nov 1992 17:32:36 GMT
Organization: The Home of the Pilhuhn
Message-ID: <1992Nov17.173236.11953@pilhuhn.ka.sub.org>
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