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# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: mount-boot.eclass
# @MAINTAINER:
# base-system@gentoo.org
# @SUPPORTED_EAPIS: 6 7 8
# @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.
case ${EAPI:-0} in
6|7|8) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
EXPORT_FUNCTIONS pkg_pretend pkg_preinst pkg_postinst pkg_prerm pkg_postrm
# @FUNCTION: mount-boot_is_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 EROOT is active.
if [[ ${EROOT:-/} != / ]] ; 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 ${DONT_MOUNT_BOOT} ]] ; then
return 0
fi
# OK, we want to handle things ourselves.
return 1
}
# @FUNCTION: mount-boot_check_status
# @INTERNAL
# @DESCRIPTION:
# Check if /boot is sane, i.e., mounted as read-write if on a separate
# partition. Die if conditions are not fulfilled. If nonfatal is used,
# the function will return a non-zero status instead.
mount-boot_check_status() {
# Get out fast if possible.
mount-boot_is_disabled && return 0
# note that /dev/BOOT is in the Gentoo default /etc/fstab file
local fstabstate=$(awk '!/^[[:blank:]]*#|^\/dev\/BOOT/ && $2 == "/boot" \
{ print 1; exit }' /etc/fstab || die "awk failed")
if [[ -z ${fstabstate} ]] ; then
einfo "Assuming you do not have a separate /boot partition."
return 0
fi
local procstate=$(awk '$2 == "/boot" { split($4, a, ","); \
for (i in a) if (a[i] ~ /^r[ow]$/) { print a[i]; break }; exit }' \
/proc/mounts || die "awk failed")
if [[ -z ${procstate} ]] ; then
eerror "Your boot partition is not mounted at /boot."
eerror "Please mount it and retry."
die -n "/boot not mounted"
return 1
fi
if [[ ${procstate} == ro ]] ; then
eerror "Your boot partition, detected as being mounted at /boot," \
"is read-only."
eerror "Please remount it as read-write and retry."
die -n "/boot mounted read-only"
return 2
fi
einfo "Your boot partition was detected as being mounted at /boot."
einfo "Files will be installed there for ${PN} to function correctly."
return 0
}
mount-boot_pkg_pretend() {
mount-boot_check_status
}
mount-boot_pkg_preinst() {
mount-boot_check_status
}
mount-boot_pkg_prerm() {
mount-boot_check_status
if [[ -z ${EPREFIX} ]] \
&& ! ( shopt -s failglob; : "${EROOT}"/boot/.keep* ) 2>/dev/null
then
# Create a .keep file, in case it is shadowed at the mount point
touch "${EROOT}"/boot/.keep 2>/dev/null
fi
}
# No-op phases for backwards compatibility
mount-boot_pkg_postinst() { :; }
mount-boot_pkg_postrm() { :; }
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