source: bootscripts-embedded/clfs/rc.d/shutdown

#!/bin/ash

# System Shutdown Script
#

. /etc/rc.d/init.d/functions

echo
echo "System is going down for reboot or halt now."
echo


echo "Starting stop scripts."

for i in /etc/rc.d/stop/*
do
        if [ -x $i ]; then
                $i stop
        fi
done

if [ -x /sbin/hwclock ] && [ -e /dev/rtc0 ]; then
        echo -n "Syncing system clock to hardware clock: "
        hwclock --systohc --utc
        check_status
fi

if [ -x /sbin/swapoff ] && [ -s /etc/fstab ]; then
        echo -n "Disabling swap space: "
        swapoff -a
        check_status
fi

echo -n "Syncing all filesystems: "
sync
check_status

echo -n "Unmounting all filesystems: "
umount -a -r