busybox/examples/shutdown-1.0/script/do_shutdown

#!/bin/sh
# We are called with stdin/out/err = /dev/null

resetgracetime=60

logfile="/var/log/reboot/`date '+%Y%m%d%H%M%S'`.log"
mkdir -p /var/log/reboot

PATH=/sbin:/bin

say() {
	printf "\r%s\n\r" "$*"
}

# Since there is a potential for various fuckups during umount,
# we start delayed hard reboot here which will forcibly
# reboot hung box in a remote datacenter a thousand miles away ;)
if test "$1" = "-r"; then
	./hardshutdown -r "$resetgracetime" &
fi

# Now, (try to) switch away from X and open a console. I've seen reboots
# hung on open("/dev/console"), therefore we do it _after_ hardshutdown
exec >/dev/console 2>&1

if test "$1" = "-r"; then
	say "* `date '+%H:%M:%S'` Scheduled hard reboot in $resetgracetime seconds"
fi

say "* `date '+%H:%M:%S'` Stopping tasks (see /var/log/reboot/* files)"
# log reboot event to file. %Y%m%d%H%M%S: YYYYMMDDHHMMSS
./stop_tasks >"$logfile" 2>&1

# Dying X tends to leave us at semi-random vt. Try to fix that,
# but if it doesn't work, proceed anyway.
exec >/dev/null 2>&1
chvt 1 & sleep 1
exec >/dev/console 2>&1

command -v ctrlaltdel >/dev/null && {
	say "* `date '+%H:%M:%S'` Setting Ctrl-Alt-Del to 'hard'"
	ctrlaltdel hard
}

say "* `date '+%H:%M:%S'` Stopping storage devices"
# we can't log this: we are about to unmount everything!
./stop_storage "$@"

# If we have cmdline params, start hardshutdown with them
test "$*" && ./hardshutdown "$@"

# Just sleep endlessly...
say "* `date '+%H:%M:%S'` You may now power off or press Ctrl-Alt-Del to reboot"
while true; do sleep 32000; done