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From: richard@aiai.ed.ac.uk (Richard Tobin)
Newsgroups: comp.unix.wizards
Subject: Re: Why isn't argv[argc]==(char *)0 ?
Message-ID: <1391@skye.ed.ac.uk>
Date: 22 Nov 89 12:56:35 GMT
References: <547.nlhp3@oracle.nl> <1989Nov16.012439.6405@virtech.uucp> <2651@auspex.auspex.com>
Reply-To: richard@aiai.UUCP (Richard Tobin)
Organization: AIAI, University of Edinburgh, Scotland
Lines: 15

In article <2651@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes:

>*Much* older versions; the first version I saw with argv[argc] == 0 was V7

So it's probably the first version that had it.  From the Sixth Edition
man page for exec(II):

 "Argv is not directly usable in another execv, since argv[argc] is -1
  and not 0."

-- Richard
-- 
Richard Tobin,                       JANET: R.Tobin@uk.ac.ed             
AI Applications Institute,           ARPA:  R.Tobin%uk.ac.ed@nsfnet-relay.ac.uk
Edinburgh University.                UUCP:  ...!ukc!ed.ac.uk!R.Tobin