Re: archive generated by shar -V does not support the -c option]

[Ralf Wildenhues]

* Bob Proulx wrote on Sun, Aug 29, 2010 at 12:26:14AM CEST:
> Karl Berry wrote:
> >             test "X$1" = "X-c" && keep_file=false || keep_file=true
> > 
> > Sounds like a good change in principle, but the precedence of && and ||
> > is not portable (or at least it wasn't, NN years ago).  Safer to say:
> 
> If I recall correctly the order of "cmd1 && cmd2 || cmd3" is okay.  As
> I recall it is the other order "cmd1 || cmd2 && cmd3" that was
> problematic.  (I went trolling through the autoconf portability docs
> looking for any hints in that area and couldn't find a mention of it.

AFAIK it's strict left-to-right evaluation in both cases.  The caveat is
that no programmer expects that evaluation order, which is why if...else
is cleaner.  The other portability caveat is when set -e is in the game.

Cheers,
Ralf