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#!/usr/bin/sh
#
# Set a default boot entry for GRUB.
# Copyright (C) 2004,2009 Free Software Foundation, Inc.
#
# GRUB is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# GRUB is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GRUB. If not, see <http://www.gnu.org/licenses/>.
#set -eu
# Initialize some variables.
prefix=/usr
exec_prefix=/usr
sbindir=/usr/sbin
bindir=/usr/bin
sysconfdir="/etc"
PACKAGE_NAME=GRUB
PACKAGE_VERSION=2.06
datarootdir="/usr/share"
datadir="/usr/share"
if [ ! -v pkgdatadir ]; then
pkgdatadir="${datadir}/grub"
fi
self=`basename $0`
grub_get_kernel_settings="${sbindir}/grub2-get-kernel-settings"
grub_editenv=${bindir}/grub2-editenv
etcdefaultgrub=/etc/default/grub
eval "$("${grub_get_kernel_settings}")" || true
EFIDIR=$(grep ^ID= /etc/os-release | sed -e 's/^ID=//' -e 's/rhel/redhat/' -e 's/\"//g')
if [ -d /sys/firmware/efi/efivars/ ]; then
startlink=/etc/grub2-efi.cfg
grubdir=`echo "/boot/efi/EFI/${EFIDIR}/" | sed 's,//*,/,g'`
else
startlink=/etc/grub2.cfg
grubdir=`echo "/boot/grub2" | sed 's,//*,/,g'`
fi
blsdir=`echo "/boot/loader/entries" | sed 's,//*,/,g'`
backupsuffix=.bak
arch="$(uname -m)"
export TEXTDOMAIN=grub
export TEXTDOMAINDIR="${datarootdir}/locale"
. "${pkgdatadir}/grub-mkconfig_lib"
# Usage: usage
# Print the usage.
usage () {
gettext_printf "Usage: %s\n" "$self"
gettext "Switch to BLS config files.\n"; echo
echo
print_option_help "-h, --help" "$(gettext "print this message and exit")"
print_option_help "-V, --version" "$(gettext "print the version information and exit")"
echo
print_option_help "--backup-suffix=$(gettext "SUFFIX")" "$backupsuffix"
print_option_help "--bls-directory=$(gettext "DIR")" "$blsdir"
print_option_help "--config-file=$(gettext "FILE")" "$startlink"
print_option_help "--grub-defaults=$(gettext "FILE")" "$etcdefaultgrub"
print_option_help "--grub-directory=$(gettext "DIR")" "$grubdir"
# echo
# gettext "Report bugs to <bug-grub@gnu.org>."; echo
}
argument () {
opt=$1
shift
if test $# -eq 0; then
gettext_printf "%s: option requires an argument -- \`%s'\n" "$self" "$opt" 1>&2
exit 1
fi
echo $1
}
# Check the arguments.
while test $# -gt 0
do
option=$1
shift
case "$option" in
-h | --help)
usage
exit 0 ;;
-V | --version)
echo "$self (${PACKAGE_NAME}) ${PACKAGE_VERSION}"
exit 0 ;;
--backup-suffix)
backupsuffix=`argument $option "$@"`
shift
;;
--backup-suffix=*)
backupsuffix=`echo "$option" | sed 's/--backup-suffix=//'`
;;
--bls-directory)
blsdir=`argument $option "$@"`
shift
;;
--bls-directory=*)
blsdir=`echo "$option" | sed 's/--bls-directory=//'`
;;
--config-file)
startlink=`argument $option "$@"`
shift
;;
--config-file=*)
startlink=`echo "$option" | sed 's/--config-file=//'`
;;
--grub-defaults)
etcdefaultgrub=`argument $option "$@"`
shift
;;
--grub-defaults=*)
etcdefaultgrub=`echo "$option" | sed 's/--grub-defaults=//'`
;;
--grub-directory)
grubdir=`argument $option "$@"`
shift
;;
--grub-directory=*)
grubdir=`echo "$option" | sed 's/--grub-directory=//'`
;;
*)
gettext_printf "Unrecognized option \`%s'\n" "$option" 1>&2
usage
exit 1
;;
esac
done
find_grub_cfg() {
local candidate=""
while [ -e "${candidate}" -o $# -gt 0 ]
do
if [ ! -e "${candidate}" ] ; then
candidate="$1"
shift
fi
if [ -L "${candidate}" ]; then
candidate="$(realpath "${candidate}")"
fi
if [ -f "${candidate}" ]; then
export GRUB_CONFIG_FILE="${candidate}"
return 0
fi
done
return 1
}
if ! find_grub_cfg ${startlink} ${grubdir}/grub.cfg ; then
gettext_printf "Couldn't find config file\n" 1>&2
exit 1
fi
if [ ! -d "${blsdir}" ]; then
install -m 700 -d "${blsdir}"
fi
if [ -f /etc/machine-id ]; then
MACHINE_ID=$(cat /etc/machine-id)
else
MACHINE_ID=$(dmesg | sha256sum)
fi
mkbls() {
local kernelver=$1 && shift
local datetime=$1 && shift
local kernelopts=$1 && shift
local debugname=""
local debugid=""
local flavor=""
if [ "$kernelver" == *\+* ] ; then
local flavor=-"${kernelver##*+}"
if [ "${flavor}" == "-debug" ]; then
local debugname=" with debugging"
local debugid="-debug"
fi
fi
(
source /etc/os-release
cat <<EOF
title ${NAME} (${kernelver}) ${VERSION}${debugname}
version ${kernelver}${debugid}
linux /vmlinuz-${kernelver}
initrd /initramfs-${kernelver}.img
options ${kernelopts}
grub_users \$grub_users
grub_arg --unrestricted
grub_class kernel${flavor}
EOF
) | cat
}
copy_bls() {
for kernelver in $(cd /lib/modules/ ; ls -1) "" ; do
bls_target="${blsdir}/${MACHINE_ID}-${kernelver}.conf"
linux="/vmlinuz-${kernelver}"
linux_path="/boot${linux}"
kernel_dir="/lib/modules/${kernelver}"
if [ ! -d "${kernel_dir}" ] ; then
continue
fi
if [ ! -f "${linux_path}" ]; then
continue
fi
linux_relpath="$("${grub_mkrelpath}" "${linux_path}")"
bootprefix="${linux_relpath%%"${linux}"}"
cmdline="root=${LINUX_ROOT_DEVICE} ro ${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
mkbls "${kernelver}" \
"$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${kernel_dir}")")" \
"${bootprefix}" "${cmdline}" >"${bls_target}"
if [ "x$GRUB_LINUX_MAKE_DEBUG" = "xtrue" ]; then
bls_debug="$(echo ${bls_target} | sed -e "s/${kernelver}/${kernelver}~debug/")"
cp -aT "${bls_target}" "${bls_debug}"
title="$(grep '^title[ \t]' "${bls_debug}" | sed -e 's/^title[ \t]*//')"
options="$(echo "${cmdline} ${GRUB_CMDLINE_LINUX_DEBUG}" | sed -e 's/\//\\\//g')"
sed -i -e "s/^title.*/title ${title}${GRUB_LINUX_DEBUG_TITLE_POSTFIX}/" "${bls_debug}"
sed -i -e "s/^options.*/options ${options}/" "${bls_debug}"
fi
done
if [ -f "/boot/vmlinuz-0-rescue-${MACHINE_ID}" ]; then
mkbls "0-rescue-${MACHINE_ID}" "0" "${bootprefix}" >"${blsdir}/${MACHINE_ID}-0-rescue.conf"
fi
}
# The grub2 EFI binary is not copied to the ESP as a part of an ostree
# transaction. Make sure a grub2 version with BLS support is installed
# but only do this if the blsdir is not set, to make sure that the BLS
# parsing module will search for the BLS snippets in the default path.
if test -f /run/ostree-booted && test -d /sys/firmware/efi/efivars && \
! ${grub_editenv} - list | grep -q blsdir && \
mountpoint -q /boot; then
grub_binary="$(find /usr/lib/ostree-boot/efi/EFI/${EFIDIR}/ -name grub*.efi)"
install -m 700 ${grub_binary} ${grubdir} || exit 1
# Create a hidden file to indicate that grub2 now has BLS support.
touch /boot/grub2/.grub2-blscfg-supported
fi
GENERATE=0
if grep '^GRUB_ENABLE_BLSCFG=.*' "${etcdefaultgrub}" \
| grep -vq '^GRUB_ENABLE_BLSCFG="*true"*\s*$' ; then
if ! sed -i"${backupsuffix}" \
-e 's,^GRUB_ENABLE_BLSCFG=.*,GRUB_ENABLE_BLSCFG=true,' \
"${etcdefaultgrub}" ; then
gettext_printf "Updating %s failed\n" "${etcdefaultgrub}"
exit 1
fi
GENERATE=1
elif ! grep -q '^GRUB_ENABLE_BLSCFG=.*' "${etcdefaultgrub}" ; then
if ! echo 'GRUB_ENABLE_BLSCFG=true' >> "${etcdefaultgrub}" ; then
gettext_printf "Updating %s failed\n" "${etcdefaultgrub}"
exit 1
fi
GENERATE=1
fi
if [ "${GENERATE}" -eq 1 ] ; then
copy_bls
if [ $arch = "x86_64" ] && [ ! -d /sys/firmware/efi ]; then
mod_dir="i386-pc"
elif [ $arch = "ppc64" -o $arch = "ppc64le" ] && [ ! -d /sys/firmware/opal ]; then
mod_dir="powerpc-ieee1275"
fi
if [ -n "${mod_dir}" ]; then
for mod in blscfg increment; do
install -m 700 ${prefix}/lib/grub/${mod_dir}/${mod}.mod ${grubdir}/$mod_dir/ || exit 1
done
fi
cp -af "${GRUB_CONFIG_FILE}" "${GRUB_CONFIG_FILE}${backupsuffix}"
if ! grub2-mkconfig -o "${GRUB_CONFIG_FILE}" ; then
install -m 700 "${GRUB_CONFIG_FILE}${backupsuffix}" "${GRUB_CONFIG_FILE}"
sed -i"${backupsuffix}" \
-e 's,^GRUB_ENABLE_BLSCFG=.*,GRUB_ENABLE_BLSCFG=false,' \
"${etcdefaultgrub}"
gettext_printf "Updating %s failed\n" "${GRUB_CONFIG_FILE}"
exit 1
fi
fi
# Bye.
exit 0
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