etc-gentoo/init.d/swap

#!/sbin/openrc-run
# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.

depend()
{
	before localmount
	keyword -jail -openvz -prefix -systemd-nspawn -vserver -lxc
}

start()
{
	ebegin "Activating swap devices"
	case "$RC_UNAME" in
		Linux)		swapon -a -e >/dev/null;;
		NetBSD|OpenBSD) swapctl -A -t noblk >/dev/null;;
		*)		swapon -a >/dev/null;;
	esac
	eend 0 # If swapon has nothing todo it errors, so always return 0
}

stop()
{
	ebegin "Deactivating swap devices"

	# Try to unmount all tmpfs filesystems not in use, else a deadlock may
	# occur. As $RC_SVCDIR may also be tmpfs we cd to it to lock it
	cd "$RC_SVCDIR"
	umount -a -t tmpfs 2>/dev/null

	case "$RC_UNAME" in
		NetBSD|OpenBSD)	swapctl -U -t noblk >/dev/null;;
		*)		swapoff -a >/dev/null;;
	esac
	eend 0
}