Date: Fri, 7 Jan 2005 18:43:32 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Tom Vilot <tom@vilot.com> Cc: questions@freebsd.org Subject: Re: my lame attempt at a shell script... Message-ID: <20050107164332.GB2249@orion.daedalusnetworks.priv> In-Reply-To: <41DEBA93.8060909@vilot.com> References: <41DEBA93.8060909@vilot.com>
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On 2005-01-07 09:36, Tom Vilot <tom@vilot.com> wrote:
>Eric F Crist wrote:
>> What is the point of the { } around some variables?
>
> It's not strictly necessary, except in some cases. i.e:
>
> m=34
> echo $m
>
> You don't need it there.
> But you would want it here:
>
> f=/var/filename
> fname=${f//name/name2}
Or when characters adjacent to the variable name may be difficult to
separate from the name itself:
disk="ad0"
slice="${disk}s1"
partition="${slice}a"
#
echo "${disk} ${partition} ${slice}"
- Giorgos
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