cloudron-box/src/scripts/addmount.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

mount_file_contents="$1"

# mount units must be named after the mount point directories they control
where=$(echo "${mount_file_contents}" | grep "^Where=" | cut -d'=' -f 2)

mount_filename=$(systemd-escape -p --suffix=mount "$where")
mount_file="/etc/systemd/system/${mount_filename}"

systemctl stop "${mount_filename}" || true

echo "$mount_file_contents" > "${mount_file}"

systemctl daemon-reload

# systemd can automatically create the "where" dir but the backup logic relies on permissions
mkdir -p "${where}"
chown yellowtent:yellowtent "${where}" || true # this can fail with nfs+root_squash
chmod 777 "${where}" # this allows all users to read and write

systemctl enable --no-block --now "${mount_filename}" || true