#!/sbin/openrc-run
# Copyright 2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

description="udev Coldplug all Devices"

udevmonitor_log=/run/udevmonitor.log
udevmonitor_pid=/run/udevmonitor.pid

depend()
{
	need udev
	provide dev
	keyword -lxc -systemd-nspawn -vserver
}

start_pre()
{
	if yesno "${udev_monitor:-no}"; then
		einfo "Running udevadm monitor ${udev_monitor_opts} to log all events"
		start-stop-daemon --start --stdout "${udevmonitor_log}" \
			--make-pidfile --pidfile "${udevmonitor_pid}" \
			--background --exec /bin/udevadm -- monitor ${udev_monitor_opts}
	fi
	return 0
}

display_hotplugged_services()
{
	local svcfile= svc= services=
	for svcfile in "${RC_SVCDIR}"/hotplugged/*; do
		svc="${svcfile##*/}"
		[ -x "${svcfile}" ] || continue

		services="${services} ${svc}"
	done
	[ -n "${services}" ] && einfo "Device initiated services:${HILITE}${services}${NORMAL}"
	return 0
}

start_post()
{
	if yesno "${udev_monitor:-no}"; then
		if yesno "${udev_monitor_keep_running:-no}"; then
			ewarn "udevmonitor is still writing into ${udevmonitor_log}"
		else
			einfo "Stopping udevmonitor: Log is in ${udevmonitor_log}"
			start-stop-daemon --stop --pidfile "${udevmonitor_pid}" \
				--exec /bin/udevadm
		fi
	fi
	display_hotplugged_services
	return 0
}

# This is here because some software expects /dev/root to exist.
# For more information, see this bug:
# https://bugs.gentoo.org/show_bug.cgi?id=438380
dev_root_link()
{
	local RULESDIR=/run/udev/rules.d
	[ -d $RULESDIR ] || mkdir -p $RULESDIR
	eval $(udevadm info --export --export-prefix=ROOT_ --device-id-of-file=/ ||
		true)
	[ "$ROOT_MAJOR" -a "$ROOT_MINOR" ] || return 0

	# btrfs filesystems have bogus major/minor numbers
	[ "$ROOT_MAJOR" != 0 ] || return 0

	echo 'ACTION=="add|change", SUBSYSTEM=="block", ENV{MAJOR}=="'$ROOT_MAJOR'", ENV{MINOR}=="'$ROOT_MINOR'", SYMLINK+="root"' > $RULESDIR/61-dev-root-link.rules
	return 0
}

start()
{
	if yesno ${rc_dev_root_symlink:-yes}; then
		ebegin "Generating a rule to create a /dev/root symlink"
		dev_root_link
		eend $?
	fi

	get_bootparam "nocoldplug" && rc_coldplug="no"
	if ! yesno ${rc_coldplug:-${RC_COLDPLUG:-yes}}; then
		einfo "Setting /dev permissions and symbolic links"
		udevadm trigger --attr-match=dev --action=add
		udevadm trigger --subsystem-match=net --action=add
		rc=$?
		ewarn "Skipping udev coldplug sequence"
		return $rc
	fi

	ebegin "Populating /dev with existing devices through uevents"
	udevadm trigger --type=subsystems --action=add
	udevadm trigger --type=devices --action=add
	eend $?
}
