Arch Linux - /etc/rc.shutdown

#!/bin/bash
#
# /etc/rc.shutdown
#

. /etc/rc.conf
. /etc/rc.d/functions

# avoid staircase effect
stty onlcr

echo " "
printhl "Initiating Shutdown..."
echo " "

run_hook shutdown_start

[[ -x /etc/rc.local.shutdown ]] && /etc/rc.local.shutdown

stop_all_daemons

run_hook shutdown_prekillall

kill_all

run_hook shutdown_postkillall

stat_busy "Saving Random Seed"
    RANDOM_SEED=/var/lib/misc/random-seed
    install -TDm 0600 <(:) $RANDOM_SEED
    POOL_FILE=/proc/sys/kernel/random/poolsize
    if [[ -r $POOL_FILE ]]; then
        read POOL_SIZE < $POOL_FILE
    else
        POOL_SIZE=512
    fi
    dd if=/dev/urandom of=$RANDOM_SEED count=1 bs=$POOL_SIZE &>/dev/null
stat_done

[[ $TIMEZONE ]] &&
    status "Saving Time Zone" \
        cp --remove-destination "/usr/share/zoneinfo/$TIMEZONE" /etc/localtime

# Write to wtmp file before unmounting
halt -w

status "Deactivating Swap" swapoff -a

# stop monitoring of lvm2 groups before unmounting filesystems
[[ $USELVM = [Yy][Ee][Ss] && -x $(type -P lvm) && -d /sys/block ]] &&
    status "Deactivating monitoring of LVM2 groups" \
        vgchange --monitor n &>/dev/null

# if we don't have devtmpfs support, /dev is mounted as tmpfs, so don't unmount it
status "Unmounting Filesystems" \
    umount -a -r -t nodevtmpfs,notmpfs,nosysfs,noproc,nodevpts -O no_netdev

run_hook shutdown_postumount

# Kill non-root encrypted partition mappings
if [[ -f /etc/crypttab && $CS ]] && grep -q ^[^#] /etc/crypttab; then
    stat_busy "Deactivating encrypted volumes:"
        # Maybe someone has LVM on an encrypted block device
        # executing an extra vgchange is errorless
        [[ $USELVM = [Yy][Ee][Ss] ]] && vgchange --sysinit -a n &>/dev/null
        do_lock() {
            stat_append "${1}.."
            if $CS remove "$1" &>/dev/null; then
                stat_append "ok "
            else
                stat_append "failed "
            fi
        }
        read_crypttab do_lock
    stat_done
fi

[[ $USELVM = [Yy][Ee][Ss] && -x $(type -P lvm) && -d /sys/block ]] &&
    status "Deactivating LVM2 groups" vgchange --sysinit -a n &>/dev/null

status "Remounting Root Filesystem Read-only" \
    mount -n -o remount,ro /

run_hook shutdown_poweroff

# Power off or reboot
printsep
if [[ $RUNLEVEL = 0 ]]; then
    printhl "${C_H2}POWER OFF"
    poweroff -d -f -h -i
else
    printhl "${C_H2}REBOOTING"
    # if kexec is installed and a kernel is loaded, use it
    [[ -x $(type -P kexec) ]] && kexec -e &>/dev/null
    reboot -d -f -i
fi

# End of file
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