cloudron-box/src/scripts/checkvolume.sh

#!/bin/bash

set -eu -o pipefail

if [[ ${EUID} -ne 0 ]]; then
    echo "This script should be run as root." > /dev/stderr
    exit 1
fi

if [[ $# -eq 0 ]]; then
    echo "No arguments supplied"
    exit 1
fi

if [[ "$1" == "--check" ]]; then
    echo "OK"
    exit 0
fi

volume_dir="$1"

readonly test_file="${volume_dir}/.chown-test"

mkdir -p "${volume_dir}"
rm -f "${test_file}" # clean up any from previous run

if [[ -n $(ls -A "${volume_dir}") ]]; then
    echo "volume dir is not empty"
    exit 2
fi

touch "${test_file}"
if ! chown yellowtent:yellowtent "${test_file}"; then
    echo "chown does not work"
    exit 3
fi
rm -f "${test_file}"
rm -r "${volume_dir}" # will get recreated by the local storage addon