Send stderr/stdout messages to function and trap exit signal

Question

Im working on error handling and logging in my bash script. Below I have included a simplified code snippet that exemplify the use case.

I want to achieve follow

Answer 1

You have to use

set -o pipefail

See this related StackOverflow Question.

---

Minimal example:

#!/bin/bash

trap handler ERR
handler() { echo trapped ; }

echo 1
false | :

echo 2
set -o pipefail
false | :

Output:

$ bash test.sh
1
2
trapped