openrc/init.d/checkroot

#!/sbin/runscript
# Copyright 2007-2008 Roy Marples
# All rights reserved

description="Check the root filesystem according to /etc/fstab for errors \
and optionally repair them."

depend()
{
	keywords notimeout
}

do_mtab()
{
	# Don't create mtab if /etc is readonly
	if ! echo 2>/dev/null >/etc/mtab; then
		ewarn "Skipping /etc/mtab initialization (ro root)"
		return 0
	fi
	ebegin "Updating /etc/mtab"

	# With / as tmpfs we cannot umount -at tmpfs in localmount as that
	# makes / readonly and dismounts all tmpfs even if in use which is
	# not good. Luckily, umount uses /etc/mtab instead of /proc/mounts
	# which allows this hack to work.
	grep -v "^[^ ]* / tmpfs " /proc/mounts > /etc/mtab

	# Remove stale backups
	rm -f /etc/mtab~ /etc/mtab~~
	eend 0
}

root_rw()
{
	echo 2>/dev/null >/.test.$$ || return 1
	rm -f /.test.$$
}

do_fsck()
{
	local retval=0 opts= root=
	case "${RC_UNAME}" in
		FreeBSD) opts="-F";;
		Linux) opts="-T -C0";;
	esac

	# Don't bother doing a fsck on these
	if [ -n "${CDBOOT}" ] || is_net_fs / || is_union_fs /; then
		return 0
	fi

	if root_rw; then
		einfo "root filesystem is mounted read-write - skipping"
		return 0
	fi

	root=$(fstabinfo --blockdevice /)
	[ ! -e "${root}" -a -e /dev/root ] && root=/dev/root

	# Obey the fs_passno setting for / (see fstab(5))
	local pass=$(fstabinfo --passno /)
	if [ ${pass:-0} != "0" ]; then
		ebegin "Checking root filesystem"
		fsck ${opts} -p "${root}"
		retval=$?
	else
		ebegin "Skipping root filesystem check (fstab's passno == 0)"
		retval=0
	fi

	if [ ${retval} -eq 0 ]; then
		eend 0
	elif [ ${retval} -eq 1 ]; then
		ewend 1 "Filesystem repaired"
		retval=0
	elif [ ${retval} -eq 8 ]; then
		ewend 1 $"Operational error, continuing"
		retval=0
	elif [ ${retval} -eq 2 -o ${retval} -eq 3 ]; then
		ewend 1 "Filesystem repaired, but reboot needed!"
		if ! yesno ${rc_force_auto:-${RC_FORCE_AUTO}}; then
			printf "\a"; sleep 1; printf "\a"; sleep 1
			printf "\a"; sleep 1; printf "\a"; sleep 1
			ewarn "Rebooting in 10 seconds ..."
			sleep 10
		fi
		einfo "Rebooting"
		reboot -f
	else
		if yesno ${rc_force_auto:-${RC_FORCE_AUTO}}; then
			eend 2 "Rerunning fsck in force mode"
			fsck ${opts} -y "${root}"
			retval=$?
		else
			eend 2 "Filesystem couldn't be fixed :("
			exec rc-abort || exit 1
		fi
		if [ ${retval} != "0" ]; then
			einfo "Unmounting filesystems"
			if [ "${RC_UNAME}" = "Linux" ]; then
				mount -a -o remount,ro /
			else
				mount -u -o ro /
			fi
			einfo "Rebooting"
			reboot -f
		fi
	fi
}

start()
{
	do_fsck || return 1

	if ! root_rw; then
		ebegin "Remounting root filesystem read/write"
		if [ "${RC_UNAME}" = "Linux" ]; then
			mount -n -o remount,rw /
		else
			mount -u -o rw /
		fi
		eend $? "Root filesystem could not be mounted read/write" || return $?
	fi

	# Only Linux has mtab
	[ "${RC_UNAME}" = "Linux" -a -e /proc/mounts ] && do_mtab

	# We got here, so return 0
	return 0
}