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# cron output backend
# shellcheck shell=bash
eval_cron_expr() {
local m h dom mon dow
case "${timer[OnCalendar]}" in
# handle special calendar event expressions
minutely) ;;
hourly) m=0 ;;
daily)
m=0
h=0
;;
weekly)
m=0
h=0
dow=1
;;
monthly)
m=0
h=0 dom=1
;;
quarterly)
m=0
h=0
dom=1
m=1,4,7,10
;;
semiannually)
m=0
h=0
dom=1
m=1,7
;;
yearly)
m=0
h=0
dom=1
m=1
;;
# Parse
*)
read -ra oncal <<<"${timer[OnCalendar]}"
for calsub in "${oncal[@]}"; do
# echo "Sub: ${calsub}"
if [[ "$calsub" =~ ^([,0-6]|\.\.|Sun|Mon|Tue|Wed|Thu|Fri|Sat)+$ ]]; then
declare -l dow="${calsub//../-}"
continue
echo " dow: ${dow}"
fi
case "${calsub}" in
*-*) # Date
# cron is year agnostic, just require mon-dom and
dom="${calsub##*-}"
calsub="${calsub%-"$dom"}"
mon="${calsub##*-}"
continue
echo " mon: $mon"
echo " dom: $dom"
;;
*:*) # Time
# cron granularity is seconds
h="${calsub%%:*}"
calsub="${calsub#"${h}":}"
m="${calsub%%:*}"
continue
echo " h: $h"
echo " m: $m"
;;
esac
done
;;
esac
echo "${m:-*} ${h:-*} ${dom:-*} ${mon:-*} ${dow:-*}"
}
gen_cron_entry() {
local sep
crontab=$(eval_cron_expr)
printf '# %s\n\n' 'm h dom mon dow user command'
printf '%s %s [ -d /run/systemd/system ] || {' "${crontab}" "${service[User]:-root}"
while read -r cmd; do
printf '%s %s' "${sep:-}" "${cmd}"
sep=';'
done <<<"$(handle_exec_prefixes "${service[ExecStart]}")"
printf '; }\n'
printf '# %s\n' 'Alternatively, if your system is running openrc you could use'
printf '# %s %s %s\n' "${crontab}" 'root' "rc-service ${systemd_unit_file%.timer} start"
}
export_timer() {
systemd_unit=$1
base_dir=$2
cron_dir="${base_dir}/cron.d"
if [[ -z "${timer[OnCalendar]:-}" ]] ; then
# Empty, are any of OnActiveSec, OnBootSec, OnStartupSec,
# OnUnitActiveSec, OnUnitInactiveSec, OnClockChange,
# OnTimezoneChange supportable?
echo "WARNING: timer[OnCalendar] empty, skipping" >&2
return
fi
mkdir -p "${cron_dir}"
cron_d_file="${cron_dir}/$(basename "${systemd_unit}" .timer)"
# embed source and sha256
gen_origin >"${cron_d_file}"
# generate the cron entry into the appropriate file
gen_cron_entry >>"${cron_d_file}"
}
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