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

[Greg Wooledge]

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
files=("$d"/S??sshd)
if (( ${#files[@]} > 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.