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From: jsdy@hadron.UUCP (Joseph S. D. Yao)
Newsgroups: net.unix-wizards,net.bugs.usg
Subject: Re: Shell out bug in pg (but a more general problem)
Message-ID: <127@hadron.UUCP>
Date: Mon, 11-Mar-85 19:18:29 EST
Article-I.D.: hadron.127
Posted: Mon Mar 11 19:18:29 1985
Date-Received: Wed, 13-Mar-85 01:02:17 EST
References: <12@istbt.UUCP> <562@rlgvax.UUCP> <9069@brl-tgr.ARPA>
Organization: Hadron, Inc., Fairfax, VA
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Xref: watmath net.unix-wizards:12409 net.bugs.usg:193

[Re: checking the return value of wait(2) for pid/-1.]
> Any such code out there should be redone, and all future code which
> waits for children *must* check that the process which exited is the
> process that was being waited for.

This was being said some time around the era of   V E R S I O N   5!
All versions of UNIX that I can recall, back to that era, had both this
feature and this bug in most of its code.  (I'm not familiar with UNIX
before 1974/V5 -- the problem may even predate that.)
;-S

Joe Yao		hadron!jsdy@seismo.{ARPA,UUCP}