linuxserver.io lsiown script (extracted with `docker run --rm -it ghcr.io/linuxserver/baseimage-ubuntu:jammy cat /usr/bin/lsiown`)

lsiown.sh

#!/bin/bash

MAXDEPTH=("-maxdepth" "0")
OPTIONS=()
while getopts RcfvhHLP OPTION
do
    if [[ "${OPTION}" != "?" && "${OPTION}" != "R" ]]; then
        OPTIONS+=("-${OPTION}")
    fi
    if [[ "${OPTION}" = "R" ]]; then
        MAXDEPTH=()
    fi
done

shift $((OPTIND - 1))
OWNER=$1
IFS=: read -r USER GROUP <<< "${OWNER}"
if [[ -z "${GROUP}" ]]; then
    printf '**** Permissions could not be set. Group is missing or incorrect, expecting user:group. ****\n'
    exit 0
fi

ERROR='**** Permissions could not be set. This is probably because your volume mounts are remote or read-only. ****\n**** The app may not work properly and we will not provide support for it. ****\n'
PATH=("${@:2}")
/usr/bin/find "${PATH[@]}" "${MAXDEPTH[@]}" \( ! -group "${GROUP}" -o ! -user "${USER}" \) -exec chown "${OPTIONS[@]}" "${USER}":"${GROUP}" {} + || printf "${ERROR}"