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From: rank1seeker@gmail.com
To: "Tim Kientzle" <tim@kientzle.com>
Subject: Re: Is this a regex bug?
Date: Sun, 26 Jan 2014 22:32:55 +0100
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> -n is being interpreted as an option to =91echo=92 and being swallowed =
before it gets to egrep.=0D=0A> =0D=0A> - Mark=0D=0A=0D=0A=0D=0AI've =
tried without echo=0D=0A=0D=0Aprintf "\-n\n" | egrep =
'^\-[[:alnum:]]+$'=0D=0A=0D=0AThis works!=0D=0AThanks for pointing =
out.=0D=0A=0D=0A=0D=0A=0D=0A> Try without the grep:=0D=0A> =0D=0A> $ echo =
'-m'=0D=0A> -m=0D=0A> $ echo '-n'=0D=0A> $ echo '-o'=0D=0A> -o=0D=0A> $ =
man echo=0D=0A> =0D=0A> =0D=0A> =0D=0A> =0D=0A> On Jan 26, 2014, at 1:04 =
PM, rank1seeker@gmail.com wrote:=0D=0A> =0D=0A> > Or am I crazy?=0D=0A> > =
=0D=0A> > echo '-m' | egrep '^\-[[:alnum:]]+$'=0D=0A> > echo '-n' | egrep =
'^\-[[:alnum:]]+$'=0D=0A> > echo '-o' | egrep '^\-[[:alnum:]]+$'=0D=0A> > =
=0D=0A> > Guess what?=0D=0A> > Only middle one, '-n' doesn't match =
it.=0D=0A> > Is this an RE bug or I clearly ain't seeing obvious?!=0D=0A> =
> =0D=0A> > echo '-n' | egrep '^\-[0-9A-Za-z]+$'=0D=0A> >    Doesn't work =
either=0D=0A> > =0D=0A> > 9.2-RELEASE-p3  i386