Re: trap does not work in a trap function?

[Peter Stephenson <Peter.Stephenson@xxxxxxx>]

On Thu, 9 Sep 2010 11:44:49 +0200
Mikael Magnusson <mikachu@xxxxxxxxx> wrote:
> Could you also use "SIGEXIT() shutdown" and "unfunction SIGEXIT"
> instead, regardless of the amount of function nesting? (It seems to
> work when I try it).

What's supposed to happen is the trap, however it is set, is saved and
unset during the function, then restored afterwards (before the scope in
which the function's EXIT trap is run, hence the workaround).  So this
isn't supposed to work.  I get the following:

% TRAPEXIT() { echo This is the exit trap; }
% fn() { unfunction TRAPEXIT; }
% fn
fn:unfunction: no such hash table element: TRAPEXIT
% functions TRAPEXIT
TRAPEXIT () {
	echo This is the exit trap
}
% exit
This is the exit trap

-- 
Peter Stephenson <pws@xxxxxxx>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
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