try..catch via shell

set -e & trap

#!/bin/bash
set -e
trap "echo err" ERR

fuga()
{
  echo "fuga"
  return 1
}

hoge()
{
  fuga
  echo "hoge"
  return 1
}

hoge
echo "after hoge"

### output ###
fuga

set -eE & trap

#!/bin/bash
set -eE
trap "echo err" ERR

fuga()
{
  echo "fuga"
  return 1
}

hoge()
{
  fuga
  echo "hoge"
  return 1
}

hoge
echo "after hoge"

### output ###
fuga
err

trap ... untrap ... trap

#!/bin/bash
set -e
trap "echo err" ERR

echo "ok-state"

set +e
trap ERR
find /not_found_file
echo "returned non 0 , but continued"
trap "echo err" ERR
set -e

find /not_found_file

echo "guess un-reachable!"

### output ###
ok-state
find: /not_found_file: No such file or directory
returned non 0 , but continued
find: /not_found_file: No such file or directory
err