linux-kernel - Re: [PATCH 1/3]: Replace kernel/timeconst.pl with kernel/timeconst.sh

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Date:	Sun, 04 Jan 2009 22:51:37 +0100
From:	Alejandro Mery <amery@...nsde.org>
To:	Valdis.Kletnieks@...edu
CC:	Rob Landley <rob@...dley.net>, Ingo Oeser <ioe-lkml@...eria.de>,
	Embedded Linux mailing list <linux-embedded@...r.kernel.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH 1/3]: Replace kernel/timeconst.pl with kernel/timeconst.sh

Valdis.Kletnieks@...edu wrote:
> Close, but no cee-gar. cut does something counter-intuitive with multiple
> blanks:
>
> % echo 'a    b' | awk '{print $2}'
> b
> % echo 'a    b' | cut -d' ' -f2
>
> % echo 'a    b' | sed -r 's/[ ]+/ /g' | cut -d' ' -f2
> b
>
> Unfortunately, 'sed -r' isn't in the opengroup.org list of required options,
> and sed 's/  / /g' doesn't DTRT for 3 or more blanks (as it won't recursively
> apply the change to a *new* double blank formed by the previous change).
echo 'a    b' | tr -s ' ' | cut -d' ' -f2
b

that is the light way ;-)

Alejandro Mery

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