On 01/11/2011 09:54 AM, Aragon Gouveia wrote:
> I wasn't sure of its status in POSIX. It is useful for declaring
> variable variables - tidier than eval and I imagine faster, eg.
>
> index="1"
> setvar var_${index} "value"
>
> Will emulate it with a local function - thanks.
Indeed, it looks like FreeBSD introduced it as shorthand for:
setvar() { eval $1=\$2; }
The speed difference between that function doing an eval and a shell
builtin would be in the noise. I don't know why FreeBSD even bothered
to pollute the namespace with a builtin like that.
--
Eric Blake eblake@xxxxxxxxxx +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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