Date: Wed, 21 Aug 2002 09:48:19 +0200 From: Neil Blakey-Milner <nbm@mithrandr.moria.org> To: Luigi Rizzo <rizzo@icir.org> Cc: arch@freebsd.org Subject: Re: ugliness in rc.* scripts Message-ID: <20020821074819.GA58163@mithrandr.moria.org> In-Reply-To: <20020820232538.A53816@iguana.icir.org> References: <20020820232538.A53816@iguana.icir.org>
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On Tue 2002-08-20 (23:25), Luigi Rizzo wrote: > Hi, > in various rc.* scripts we have multiple instances of > constructs like this: > > case ${some_config_variable} in > [Mm][Ii][Xx][Ed]_[Cc][Aa][Ss][Ee]_[Ss][Tt][Rr][Ii][Nn][Gg]) > .... > > which is not the most desirable thing in terms of readability. > This would be easily fixed by moving /usr/bin/tr to /bin/tr (statically > linked) and doing > > tolower() { > echo `tr A-Z a-z <<_EOF > $*` > } > > case `tolower ${some_config_variable}` in > mixed_case_string) > ... > > > (btw, i am not sure why, in the above example the _EOF delimited > is not required nor i can find any place to put it without being > processed as stdin. Perhaps a bug in /bin/sh ?) > > Anyways, should we go for this ? I believe our scripts would be > greatly improved. I believe the argument for 'case' and those mixed case strings is that it doesn't spawn a process, whereas "if [ " did at the time. Using 'echo' and 'tr' and two ``'s will spawn four shells (or something like that). Neil -- Neil Blakey-Milner nbm@mithrandr.moria.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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