linux-kernel - Re: [PATCH/RFC] eradicate bashisms in scripts/patch-kernel

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Message-ID: <20071117164336.GA21658@gondor.apana.org.au>
Date:	Sun, 18 Nov 2007 00:43:36 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Andreas Mohr <andi@...as.de>
Cc:	Randy Dunlap <rdunlap@...otime.net>, Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH/RFC] eradicate bashisms in scripts/patch-kernel

On Sat, Nov 17, 2007 at 05:33:27PM +0100, Andreas Mohr wrote:
>
> # strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
> EXTRAVER=
> if [ x$EXTRAVERSION != "x" ]
> then
> >>> [l.207]       if [ ${EXTRAVERSION:0:1} == "." ]; then
>                 EXTRAVER=${EXTRAVERSION:1}
>         else
>                 EXTRAVER=$EXTRAVERSION
>         fi
>         EXTRAVER=${EXTRAVER%%[[:punct:]]*}
>         #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
> fi
> 
> part, which the sed expression (moderately successfully) tried to
> take care of.

You don't need a sed expression for that.  In fact the inner
if clause can be replaced by the following line:

	EXTRAVER=${EXTRAVERSION#.}

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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