Re: How to trap EXIT like in bash

[Thorsten Kampe <thorsten@thorstenkampe.de>]

* Philippe Troin (Sat, 04 Apr 2015 10:08:34 -0700)
> 
> On Sat, 2015-04-04 at 17:20 +0200, Thorsten Kampe wrote:
> > in Bash `trap "echo trapped" EXIT` will trigger when the script 
> > terminates normally and on SIGINT, SIGTERM, and SIGHUP.
> > 
> > In Zsh, `trap "echo trapped" EXIT` triggers only on normal exit, but 
> > `trap "echo trapped" EXIT INT` will actually trigger twice on Ctrl-C.
> > 
> > How can I trap normal exit, Ctrl-C, SIGTERM and SIGHUP so trap 
> > function will only run once?
> 
> I use this:
> 
> trap "echo trapped; exit 0" EXIT INT

I just tested it: Zsh is trapped once but bash twice on INT.

This works:
```
if [[ $shell = bash ]]
then
    trap "echo trapped" EXIT

elif [[ $shell = zsh ]]
then
    trap "echo trapped; exit" INT
fi
```
BUT: it does not work when I extend the signals to
```
elif [[ $shell = zsh ]]
then
    trap "echo trapped; exit" INT HUP TERM
fi
```

Then Zsh does actually ignore the kill (TERM) signal.

Thorsten