Easy bash "atexit" shutdown hooks.

gistfile1.txt

#!/bin/bash

shutdown_hooks=()

function atexit() {
    val=$(echo "$@")
    shutdown_hooks+=("$val")
}

trap "shutdown" INT TERM

function shutdown() {
    echo "Running shutdown hooks..."
    for ((i=${#shutdown_hooks[@]}-1; i >=0 ; i--)); do
        echo "${shutdown_hooks[$i]}"
        eval "${shutdown_hooks[$i]}"
    done
    
    exit 0
}

Here is a more compact variation, preserving spaces in args, and does not re-eval vars

# atexit cmd ...  : run command at script exit
atexit () { eval _ae$_ae='("$@")'; _ae+=1; }
_runatexits () { while ((_ae--)); do eval '"${_ae'$_ae'[@]}"'; done; }
declare -i _ae=0; trap _runatexits EXIT

Nice!