shutdown.sh (1425B) download
1#!/bin/sh
2# shutdown - shutdown(8) lookalike for fiss
3
4abort() {
5 printf '%s\n' "$1" >&2
6 exit 1
7}
8
9usage() {
10 abort "Usage: ${0##*/} [-fF] [-kchPr] time [warning message]"
11}
12
13action=:
14
15while getopts akrhPHfFnct: opt; do
16 case "$opt" in
17 a|n|H) abort "'-$opt' is not implemented";;
18 t) ;;
19 f) touch /fastboot;;
20 F) touch /forcefsck;;
21 k) action=true;;
22 c) action=cancel;;
23 h|P) action=halt;;
24 r) action=reboot;;
25 [?]) usage;;
26 esac
27done
28shift $((OPTIND - 1))
29
30[ $# -eq 0 ] && usage
31
32time=$1; shift
33message="${*:-system is going down}"
34
35if [ "$action" = "cancel" ]; then
36 kill "$(cat /run/fiss/shutdown.pid)"
37 if [ -e /etc/nologin ] && ! [ -s /etc/nologin ]; then
38 rm /etc/nologin
39 fi
40 echo "${*:-shutdown cancelled}" | wall
41 exit
42fi
43
44touch /run/fiss/shutdown.pid 2>/dev/null || abort "Not enough permissions to execute ${0#*/}"
45echo $$ >/run/fiss/shutdown.pid
46
47case "$time" in
48 now) time=0;;
49 +*) time=${time#+};;
50 *:*) abort "absolute time is not implemented";;
51 *) abort "invalid time";;
52esac
53
54 for break in 5 0; do
55 [ "$time" -gt "$break" ] || continue
56 [ "$break" = 0 ] && touch /etc/nologin
57
58 printf '%s in %s minutes\n' "$message" "$time" | wall
59 printf 'shutdown: sleeping for %s minutes... ' "$(( time - break ))"
60 sleep $(( (time - break) * 60 ))
61 time="$break"
62 printf '\n'
63
64 [ "$break" = 0 ] && rm /etc/nologin
65done
66
67printf '%s NOW\n' "$message" | wall
68
69$action