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Re: RFE: make [[ compatible with [ 'Option'?

From: Greg Wooledge
Subject: Re: RFE: make [[ compatible with [ 'Option'?
Date: Mon, 28 Mar 2011 14:25:06 -0400
User-agent: Mutt/

On Mon, Mar 28, 2011 at 10:53:21AM -0700, Linda Walsh wrote:
> if [ ! -e $d/S??sshd ]; then echo "sshd not enabled"; fi

That will fail quite colorfully if the glob matches multiple files.
(Also, "$d" should be quoted.)

On IRC we recommend enabling nullglob, pulling the results of the glob
into an array, and then checking its length.

shopt -s nullglob
if (( address@hidden > 0 )); then ...

See also http://mywiki.wooledge.org/BashFAQ/004

In any case, I see no benefit to changing how [[ works.  A change would
just cause more confusion.

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