# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/mount-boot.eclass,v 1.17 2009/10/09 20:57:08 vapier Exp $
#
# This eclass is really only useful for bootloaders.
#
# If the live system has a separate /boot partition configured, then this
# function tries to ensure that it's mounted in rw mode, exiting with an
# error if it cant. It does nothing if /boot isn't a separate partition.
#
# MAINTAINER: base-system@gentoo.org

EXPORT_FUNCTIONS pkg_preinst pkg_prerm

mount-boot_mount_boot_partition() {
	if [[ -n ${DONT_MOUNT_BOOT} ]] ; then
		return
	else
		elog
		elog "To avoid automounting and auto(un)installing with /boot,"
		elog "just export the DONT_MOUNT_BOOT variable."
		elog
	fi

	# note that /dev/BOOT is in the Gentoo default /etc/fstab file
	local fstabstate=$(awk '!/^#|^[[:blank:]]+#|^\/dev\/BOOT/ {print $2}' /etc/fstab | egrep "^/boot$" )
	local procstate=$(awk '$2 ~ /^\/boot$/ {print $2}' /proc/mounts)
	local proc_ro=$(awk '{ print $2 " ," $4 "," }' /proc/mounts | sed -n '/\/boot .*,ro,/p')

	if [ -n "${fstabstate}" ] && [ -n "${procstate}" ]; then
		if [ -n "${proc_ro}" ]; then
			einfo
			einfo "Your boot partition, detected as being mounted as /boot, is read-only."
			einfo "Remounting it in read-write mode ..."
			einfo
			mount -o remount,rw /boot
			if [ "$?" -ne 0 ]; then
				eerror
				eerror "Unable to remount in rw mode. Please do it manually!"
				eerror
				die "Can't remount in rw mode. Please do it manually!"
			fi
		else
			einfo
			einfo "Your boot partition was detected as being mounted as /boot."
			einfo "Files will be installed there for ${PN} to function correctly."
			einfo
		fi
	elif [ -n "${fstabstate}" ] && [ -z "${procstate}" ]; then
		mount /boot -o rw
		if [ "$?" -eq 0 ]; then
			einfo
			einfo "Your boot partition was not mounted as /boot, but portage"
			einfo "was able to mount it without additional intervention."
			einfo "Files will be installed there for ${PN} to function correctly."
			einfo
		else
			eerror
			eerror "Cannot automatically mount your /boot partition."
			eerror "Your boot partition has to be mounted rw before the installation"
			eerror "can continue. ${PN} needs to install important files there."
			eerror
			die "Please mount your /boot partition manually!"
		fi
	else
		einfo
		einfo "Assuming you do not have a separate /boot partition."
		einfo
	fi
}

mount-boot_pkg_preinst() {
	mount-boot_mount_boot_partition
}

mount-boot_pkg_prerm() {
	touch "${ROOT}"/boot/.keep 2>/dev/null
	mount-boot_mount_boot_partition
	touch "${ROOT}"/boot/.keep 2>/dev/null
}