Date: Mon, 15 May 2000 22:04:33 -0400 From: "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com> To: Mark Ovens <mark@dogma.freebsd-uk.eu.org> Cc: Erik Trulsson <ertr1013@student.csd.uu.se>, questions@freebsd.org Subject: Re: getopt(1) or getopts(1)? Message-ID: <20000515220432.A55458@cc942873-a.ewndsr1.nj.home.com> In-Reply-To: <20000515234055.C233@parish>; from mark@dogma.freebsd-uk.eu.org on Mon, May 15, 2000 at 11:40:56PM %2B0100 References: <20000511231319.C1522@parish> <20000512084656.A1146@student.csd.uu.se> <20000512183403.A233@parish> <20000513013931.C39310@cc942873-a.ewndsr1.nj.home.com> <20000514110900.B232@parish> <20000514113604.A50543@cc942873-a.ewndsr1.nj.home.com> <20000515234055.C233@parish>
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On Mon, May 15, 2000 at 11:40:56PM +0100, Mark Ovens wrote:
> On Sun, May 14, 2000 at 11:36:04AM -0400, Crist J. Clark wrote:
> > On Sun, May 14, 2000 at 11:09:00AM +0100, Mark Ovens wrote:
> > >
>
> [snip]
>
> > >
> > > I'd almost got there, except I didn't know that shift wasn't needed.
> > >
> > > > Almost makes life too easy, huh?
> > >
> > > Almost. It does seem somewhat lacking in the error handling dept.
> > > though. Using the example code above, if you do:
> > >
> > > # foobar -o -a -b
> > >
> > > then getopts(1) thinks that ``-a'' is the argument to ``-o''.
> >
> > How do you know it is not?
> >
>
> If ``-a'' is a valid argument to ``-o'' then it would require special
> handling, not unlike filenames starting with ``-'', or containing
> metacharacters, they need quoting.
Is this standardized somewhere? And since when do filenames starting
with '-' need special handling all of the time? A lot of common tools
do not behave that way,
$ echo -v | grep -e -v
-v
$ { echo \#!/bin/sh; echo echo YES; } > -a
$ chmod 755 -a
$ sh -c -a
YES
$
Including sh(1) itself. But of course...
$ rm -a
rm: illegal option -- a
usage: rm [-f | -i] [-dPRrvW] file ...
unlink file
$ rm -- -a
$
Lotsa times '-' files do.
--
Crist J. Clark cjclark@home.com
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