Different handling of "trap" in bash 4.4.20(1)-release (x86_64-pc-linux-gnu) and bash version 5.2.15(1)-release (x86_64-aeos5-linux-gnu)

[MESSNER Andreas]

Classified as: {OPEN}

Hello,

I have a question concerning "trap"  handling in bash
Script for testing:
#/bin/bash

function cleanup ()
{
    echo "Executing cleanup"

    # trying to kill non-existing process
    killall doesnotexist >/dev/null 2>&1
    killall doesnotexist >/dev/null 2>&1

    echo "Leaving cleanup"
}
trap cleanup INT CHLD

echo "Calling cleanup"
cleanup
echo "Back from cleanup"

sleep 1

Executing the script in bash 4.4.20(1) shows the following result:
Calling cleanup
Executing cleanup
Leaving cleanup
Back from cleanup

Executing the script in bash 5.2.15(1) shows the following result:
Calling cleanup
Executing cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Leaving cleanup
Back from cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup
Executing cleanup
Leaving cleanup

I know it's an easy fix, but I'm curious as to what's causing the different 
behavior

Thank you for any replies
Andreas



{OPEN}

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