Re: How to trap EXIT like in bash

[Han Pingtian <hanpt@linux.vnet.ibm.com>]

On Sat, Apr 04, 2015 at 11:35:57AM -0700, Bart Schaefer wrote:
> Hmm.  This seems to be a side-effect of the rule that the EXIT trap does
> not run from inside other traps.  The default response to INT in a script
> is to behave as if 'trap "exit 130" INT' so the EXIT trap is not run.  In
> 
> Curiously in an interactive shell, the following prints "trapped" exactly
> one time, even though my first answer above also works interactively:
> 
>     trap "echo trapped" EXIT
>     trap exit HUP INT TERM
> 
> However, that does not work in a script.  I'm not sure why interactive
> matters here.

I think because the rule that EXIT trap doesn't run from inside other
traps, the phenomenon of script not working is correct and the
interactive shell working is wrong. 

Am I right?