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Date: Sun, 27 Feb 2005 11:47:19 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
Subject: getopt required_argument (Was Re: regtool - 1.8 - Core dump)
In-Reply-To: <4221625B.8D133A7D@dessent.net>
Message-ID: <Pine.GSO.4.61.0502271142170.14885@slinky.cs.nyu.edu>
References: <20050227054557 DOT 45931 DOT qmail AT web51102 DOT mail DOT yahoo DOT com> <4221625B DOT 8D133A7D AT dessent DOT net>
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On Sat, 26 Feb 2005, Brian Dessent wrote:

> Alexander Joerg Herrmann wrote:
>
> > What I was mentioning is that
> > regtool -K
> > causes a core fault and something similar under windows because the
> > argument is broken. I know that the argument is missing and so should
> > regtool. It should produce a usage message insteed of a crash imo.
>
> The program should not core dump on invalid arguments.  That I agree
> with, and it's a bug that should be fixed.

Well, it's just a matter of adding a check for optarg being NULL and
printing an appropriate message (e.g.,
          if (optarg == NULL) {
            fprintf(stderr, "Missing key-value separator\n");
            usage();
          }
).

However, the question is what should getopt's behavior be if something
specified as a "required_argument" is missing?  Should it simply set
optarg to NULL, just like it does with "optional_argument", or should it
return an error code of some sort?  Any getopt experts out there?
	Igor
-- 
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