jobcore/runit/shutdown
2022-03-20 14:19:37 +02:00

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#!/bin/sh
# shutdown - shutdown(8) lookalike for runit
# taken from Void Linux
single() {
runsvchdir single
}
abort() {
printf '%s\n' "$1" >&2
exit 1
}
usage() {
abort "Usage: ${0##*/} [-fF] [-kchPr] time [warning message]"
}
action=single
while getopts akrhPHfFnct: opt; do
case "$opt" in
a|n|H) abort "'-$opt' is not implemented";;
t) ;;
f) touch /fastboot;;
F) touch /forcefsck;;
k) action=true;;
c) action=cancel;;
h|P) action=halt;;
r) action=reboot;;
[?]) usage;;
esac
done
shift $((OPTIND - 1))
[ $# -eq 0 ] && usage
time=$1; shift
message="${*:-system is going down}"
if [ "$action" = "cancel" ]; then
kill "$(cat /run/runit/shutdown.pid)"
if [ -e /etc/nologin ] && ! [ -s /etc/nologin ]; then
rm /etc/nologin
fi
echo "${*:-shutdown cancelled}" | wall
exit
fi
touch /run/runit/shutdown.pid 2>/dev/null || abort "Not enough permissions to execute ${0#*/}"
echo $$ >/run/runit/shutdown.pid
case "$time" in
now) time=0;;
+*) time=${time#+};;
*:*) abort "absolute time is not implemented";;
*) abort "invalid time";;
esac
for break in 5 0; do
[ "$time" -gt "$break" ] || continue
[ "$break" = 0 ] && touch /etc/nologin
printf '%s in %s minutes\n' "$message" "$time" | wall
printf 'shutdown: sleeping for %s minutes... ' "$(( time - break ))"
sleep $(( (time - break) * 60 ))
time="$break"
printf '\n'
[ "$break" = 0 ] && rm /etc/nologin
done
printf '%s NOW\n' "$message" | wall
$action