shell variable interpolation?

[Sam Couter]

Steven Hanley <sjh at svana.org> wrote:
> All
> 
> Okay so I am wondering if there is a better way to interpolate variables
> within a string in shell than I have worked out here.

bash has a builtin expression for indirection, but it's bash-specific:

${!variablename} will expand to the value of the variable named by
variablename. Sounds like something out of a Lewis Carrol story.

Eg, given:

$FOO="bar"
$BAZ="FOO"

Then ${!BAZ} will have the value "bar".
-- 
Sam "Eddie" Couter  |  mailto:sam at couter.dropbear.id.au
Debian Developer    |  mailto:eddie at debian.org
                    |  jabber:sam at jabber.topic.com.au
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