Hacker News Reader

Comment by pedro84 | Hacker News Reader

I've used a variation of this that catches other signals as well:

  trap 'rc=$?; trap "" EXIT; cleanup $rc; exit $rc' INT TERM QUIT HUP
  trap 'cleanup; exit' EXIT

View on HN

This is unnecessary. The EXIT trap fires on any exit from the shell, not just graceful exit.

The behavior varies with shell:

    $ cat test_trap 
    trap 'echo exiting' EXIT 
    kill $$
    
    $ bash test_trap
    exiting
    Terminated
    
    $ ksh test_trap
    exiting
    Terminated

    $ mksh test_trap
    exiting
    
    $ dash test_trap
    Terminated
    
    $ zsh test_trap
    Terminated

This article is specifically about Bash. I'm not surprised that `trap` behavior varies per shell, and I'd recommend reading the documentation on it.

Reply on news.ycombinator.com