trap_cleanup.sh
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#!/bin/bash↵
set -euo pipefail↵
readonly LOCKFILE="/var/run/${0##*/}.lock"↵
readonly TMPDIR="$(mktemp -d)"↵
cleanup() {↵
local exit_code=$?↵
rm -rf "$TMPDIR"↵
[[ -f "$LOCKFILE" ]] && rm -f "$LOCKFILE"↵
exit $exit_code↵
}↵
trap cleanup EXIT INT TERM↵
exec 200>"$LOCKFILE"↵
flock -n 200 || { echo "Already running"; exit 1; }
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