Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.unix.wizards
Subject: Re: Why isn't argv[argc]==(char *)0 ?
Summary: it is.
Message-ID: <1989Nov16.012439.6405@virtech.uucp>
Date: 16 Nov 89 01:24:39 GMT
References: <547.nlhp3@oracle.nl>
Organization: Virtual Technologies Inc.
Lines: 16

In article <547.nlhp3@oracle.nl>, bengsig@oracle.nl (Bjorn Engsig) writes:
> The execv family of system calls all have  char *argv[]  as their second
> parameter, and you are required to put an endmarker as  (char *)0  in it.
> On the other hand, main has  int argc  and  char *argv[]  but here, the
> endmarker has disappeared.  Has it ever been considered to change the defi-

argv has always had an endmarker.  Older versions had the convention 
that argv[argc] == -1.  Currently under System V argv[argc] = (char *) 0.



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