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Diffstat (limited to 'eclass/mount-boot.eclass')
-rw-r--r-- | eclass/mount-boot.eclass | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/eclass/mount-boot.eclass b/eclass/mount-boot.eclass new file mode 100644 index 000000000000..4d886c8d8475 --- /dev/null +++ b/eclass/mount-boot.eclass @@ -0,0 +1,156 @@ +# Copyright 1999-2015 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 + +# @ECLASS: mount-boot.eclass +# @MAINTAINER: +# base-system@gentoo.org +# @BLURB: functions for packages that install files into /boot +# @DESCRIPTION: +# 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 can't. It does nothing if /boot isn't a separate partition. + +EXPORT_FUNCTIONS pkg_pretend pkg_preinst pkg_postinst pkg_prerm pkg_postrm + +# @FUNCTION: mount-boot_disabled +# @INTERNAL +# @DESCRIPTION: +# Detect whether the current environment/build settings are such that we do not +# want to mess with any mounts. +mount-boot_is_disabled() { + # Since this eclass only deals with /boot, skip things when ROOT is active. + if [[ "${ROOT:-/}" != "/" ]] ; then + return 0 + fi + + # If we're only building a package, then there's no need to check things. + if [[ "${MERGE_TYPE}" == "buildonly" ]] ; then + return 0 + fi + + # The user wants us to leave things be. + if [[ -n ${DONT_MOUNT_BOOT} ]] ; then + return 0 + fi + + # OK, we want to handle things ourselves. + return 1 +} + +# @FUNCTION: mount-boot_check_status +# @INTERNAL +# @DESCRIPTION: +# Figure out what kind of work we need to do in order to have /boot be sane. +# Return values are: +# 0 - Do nothing at all! +# 1 - It's mounted, but is currently ro, so need to remount rw. +# 2 - It's not mounted, so need to mount it rw. +mount-boot_check_status() { + # Get out fast if possible. + mount-boot_is_disabled && return 0 + + # note that /dev/BOOT is in the Gentoo default /etc/fstab file + local fstabstate=$(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 + echo + einfo "Your boot partition, detected as being mounted at /boot, is read-only." + einfo "It will be remounted in read-write mode temporarily." + return 1 + else + echo + einfo "Your boot partition was detected as being mounted at /boot." + einfo "Files will be installed there for ${PN} to function correctly." + return 0 + fi + elif [ -n "${fstabstate}" ] && [ -z "${procstate}" ] ; then + echo + einfo "Your boot partition was not mounted at /boot, so it will be automounted for you." + einfo "Files will be installed there for ${PN} to function correctly." + return 2 + else + echo + einfo "Assuming you do not have a separate /boot partition." + return 0 + fi +} + +mount-boot_pkg_pretend() { + # Get out fast if possible. + mount-boot_is_disabled && return 0 + + elog "To avoid automounting and auto(un)installing with /boot," + elog "just export the DONT_MOUNT_BOOT variable." + mount-boot_check_status +} + +mount-boot_mount_boot_partition() { + mount-boot_check_status + case $? in + 0) # Nothing to do. + ;; + 1) # Remount it rw. + mount -o remount,rw /boot + if [ $? -ne 0 ] ; then + echo + eerror "Unable to remount in rw mode. Please do it manually!" + die "Can't remount in rw mode. Please do it manually!" + fi + touch /boot/.e.remount + ;; + 2) # Mount it rw. + mount /boot -o rw + if [ $? -ne 0 ] ; then + echo + 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." + die "Please mount your /boot partition manually!" + fi + touch /boot/.e.mount + ;; + esac +} + +mount-boot_pkg_preinst() { + # Handle older EAPIs. + case ${EAPI:-0} in + [0-3]) mount-boot_pkg_pretend ;; + esac + + mount-boot_mount_boot_partition +} + +mount-boot_pkg_prerm() { + touch "${ROOT}"/boot/.keep 2>/dev/null + mount-boot_mount_boot_partition + touch "${ROOT}"/boot/.keep 2>/dev/null +} + +mount-boot_umount_boot_partition() { + # Get out fast if possible. + mount-boot_is_disabled && return 0 + + if [ -e /boot/.e.remount ] ; then + einfo "Automatically remounting /boot as ro as it was previously." + rm -f /boot/.e.remount + mount -o remount,ro /boot + elif [ -e /boot/.e.mount ] ; then + einfo "Automatically unmounting /boot as it was previously." + rm -f /boot/.e.mount + umount /boot + fi +} + +mount-boot_pkg_postinst() { + mount-boot_umount_boot_partition +} + +mount-boot_pkg_postrm() { + mount-boot_umount_boot_partition +} |