Date: 18 Feb 2003 10:15:42 -0500 From: "Brandon S. Allbery " KF8NH <allbery@ece.cmu.edu> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: current@FreeBSD.ORG Subject: Re: Shell programming 101: Is this an expr(1) bug ? Message-ID: <1045581342.65526.2.camel@rushlight.kf8nh.apk.net> In-Reply-To: <57374.1045568362@critter.freebsd.dk> References: <57374.1045568362@critter.freebsd.dk>
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On Tue, 2003-02-18 at 06:39, Poul-Henning Kamp wrote:
> + expr ad0 : ^ad\([0-9]\)$
> + a0=0
> syv# echo $?
> 1
> syv#
>
> That looks like a bug to me...
hilfy:202 Z$ /bin/expr ad0 : '^ad\([0-9]\)$'
0
zsh: exit 1 /bin/expr ad0 : '^ad\([0-9]\)$'
(Solaris 8 box)
The Solaris manpage claims:
EXIT STATUS
As a side effect of expression evaluation, expr returns the
following exit values:
(...)
1 if the expression is either NULL or 0
So it looks like correct behavior, if slightly odd in this particular
context.
--
brandon s allbery [openafs/solaris/japh/freebsd] allbery@kf8nh.apk.net
system administrator [linux/heimdal/too many hats] allbery@ece.cmu.edu
electrical and computer engineering KF8NH
carnegie mellon university [better check the oblivious first -ke6sls]
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