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# 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
}
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