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Re: set -e (no || or &&)

From: Greg Wooledge
Subject: Re: set -e (no || or &&)
Date: Mon, 15 Oct 2012 08:33:46 -0400
User-agent: Mutt/

On Sun, Oct 14, 2012 at 05:21:05PM -0700, Linda Walsh wrote:
> Steven W. Orr wrote:
> >Seriously, can we just put a trap on all messages to this list that have 
> >the string 'set -e' in it? Just point the sender to a message that tells 
> >them to not use it.
> ----
> Seriously -- why not just fix it?

Because POSIX has specified that it must be present, and that it must
work in certain ways.  This is because it is a legacy feature that has
been around since the dark ages, and which all too many scripts are using
(however poorly).

My personal advice is the same as Steven's: don't use it.  You're free to
take that advice, or not to take it.  Chet, on the other hand, is required(*)
to implement set -e according to the ever-changing POSIX specifications,
while simultaneously trying to mimic the historical behavior of bash and
(where possible) of other Bourne/POSIX shells.  It's a balancing act that
I don't envy him for having to do.

(*) "Required" insofar as he wants bash to remain POSIX compliant.

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