[120643] trunk/dports/lang/eero-devel

[Brandon Allbery]

On Fri, Jun 6, 2014 at 1:58 PM, Vincent <vince at macports.org> wrote:

> > With the quotes. Pedantically ${1+"$@"} is most correct, but (a) I
> suspect the case that protects against would fail anyway, and (b) on OS X
> /bin/sh is bash which handles "$@" as if it were ${1+"$@"}. (I do wonder
> how long before Apple abandons bash though....)
>
> I must admit I fail to see what ${1+“$@”} exactly refers to…
>

In classic Bourne shell, "$@" produces a single empty quoted string if
there are no shell parameters. ${1+"$@"} means "expand "$@" if and only if
$1 is set, even if it is set to an empty string". The Korn shell
(specifically ksh93, IIRC) introduced the interpretation of "$@" that bash
uses.

As the Korn shell is open source now, it would not surprise me if that
replaced bash at some point, should Apple decide it needs a newer shell
than a GPL2-ed bash. zsh also has a permissive license (although some
contributed scripts are GPL; I haven't checked the version) and might also
be an alternative.

-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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