#!/usr/bin/env bash
# Signal handling with trap

tmp_file=$(mktemp)

cleanup() {
    printf '\nCleaning up %s\n' "$tmp_file" >&2
    rm -f -- "$tmp_file"
}

trap cleanup EXIT
trap 'exit 130' INT
trap 'exit 143' TERM

printf 'Working; press Ctrl-C to interrupt.\n' > "$tmp_file"

while :; do
    sleep 1
    printf '.'
done