3

#!/bin/sh
#
# Runit stage 3: halt or restart system
# based on VOID Linux (https://www.voidlinux.org)
exec 2>&1

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 

printf '=> Entering Runit stage 3 (%s)\n' "$0"

[ -r /etc/rc.conf ] && . /etc/rc.conf

if [ -e /run/runit.kexecreboot ]; then
	if command -v kexec >/dev/null; then
		printf '=> Rebooting using kexec\n'
	else
		printf 'ERROR: kexec reboot failed, rebooting normally\n'
	fi
elif [ -e /run/runit.reboot ]; then
	printf '=> Rebooting system\n'
else
	printf '=> Shutdown and halt the system\n'
fi

printf '=> Waiting for services to stop...\n'
printf '=> Further messages will not be logged to disk\n'
pkill -f 'runsvdir.*/etc/service'
sv -w 5 force-stop /etc/service/*
sv exit /etc/service/*

# rotate boot.log file
mv -f /var/log/boot.log /var/log/boot.log.1

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

printf '=> Saving random seed...\n'
( umask 077; bytes=$(cat /proc/sys/kernel/random/poolsize) || bytes=512; \
  dd if=/dev/urandom of=/var/lib/random-seed count=1 bs=$bytes >/dev/null 2>&1 )

# Detect LXC virtualization containers
grep -q lxc /proc/self/environ >/dev/null && VIRTUALIZATION=1
if [ -z "$VIRTUALIZATION" ]; then
	printf '=> Stopping udev...\n'
	udevadm control --exit
fi

printf '=> Sending ALRM signal to processes...\n'
kill -14 -1
printf '=> Sending TERM signal to processes...\n'
pkill --inverse --session 0,1 -TERM
sleep 1
printf '=> Sending KILL signal to processes...\n'
pkill --inverse --session 0,1 -KILL

if [ -z "$VIRTUALIZATION" ]; then
	printf '=> Unmounting filesystems, disabling swap...\n'
	swapoff -a
	umount -r -a -t noproc,nosysfs,nodevfs,nodevpts,nodevtmpfs,notmpfs &
	sleep 0.5
	# deactivate vgs
	VGCHANGE="$(command -v vgchange)"
	if [ "$VGCHANGE" ] && [ "$(vgs | wc -l)" -gt 0 ]; then
		printf '=> Deactivating all LVM Volume Groups...\n'
		$VGCHANGE -an
	fi
	# trigger kexec reboot
	if [ -e /run/runit.kexecreboot ] && command -v kexec >/dev/null; then
		printf '=> Triggering kexec reboot of the current kernel...\n'
		kexec -e 2>/dev/null
		# not reached when kexec was successful.
	fi
fi