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From: guy%gorodish@Sun.COM (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: Using vfork (was Fork and Join, Pipe in C)
Message-ID: <22414@sun.uucp>
Date: Tue, 30-Jun-87 14:21:43 EDT
Article-I.D.: sun.22414
Posted: Tue Jun 30 14:21:43 1987
Date-Received: Wed, 1-Jul-87 06:31:18 EDT
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> Well, I'm not exactly proud of the technique, but I won't go so far as
> to hang my head in shame.  Fix it, you say; but what fix would you
> recommend I use?

Well, first go read the "vfork" manual, paying special attention to
the part that says "don't do that", and then change the process to
send itself an unused signal (such as SIGUSR[12] on 4.3BSD) if the
"exec" fails.  Unless somebody is being perverse and randomly sending
unused signals around, which is extremely unlikely (and anybody who
does that gets what they deserve anyway), the fact that the child was
terminated by this signal indicates that the "exec" fails.
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com