docker-baseimage-ubuntu/root/etc/s6-overlay/s6-rc.d/init-crontab-config/run

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#!/usr/bin/with-contenv bash
# shellcheck shell=bash
for cron_user in abc root; do
if [[ -f "/etc/crontabs/${cron_user}" ]]; then
lsiown "${cron_user}":"${cron_user}" "/etc/crontabs/${cron_user}"
crontab -u "${cron_user}" "/etc/crontabs/${cron_user}"
fi
if [[ -f "/defaults/crontabs/${cron_user}" ]]; then
# make folders
mkdir -p \
/config/crontabs
# if crontabs do not exist in config
if [[ ! -f "/config/crontabs/${cron_user}" ]]; then
# copy crontab from system
if crontab -l -u "${cron_user}" >/dev/null 2>&1; then
crontab -l -u "${cron_user}" >"/config/crontabs/${cron_user}"
fi
# if crontabs still do not exist in config (were not copied from system)
# copy crontab from image defaults (using -n, do not overwrite an existing file)
cp -n "/defaults/crontabs/${cron_user}" /config/crontabs/
fi
# set permissions and import user crontabs
lsiown "${cron_user}":"${cron_user}" "/config/crontabs/${cron_user}"
crontab -u "${cron_user}" "/config/crontabs/${cron_user}"
fi
done