grubby/grubby-bls
Javier Martinez Canillas f1aafa632f
grubby-bls: always generate the BLS snippets when adding new entries
a BLS file is generated at build time and stored in /lib/modules/$kernel
but this default BLS file assumes that /boot is a mount point and so the
kernel and initrd paths are relative to the root of this boot partition.

This is not the case if /boot is not a mount point or if the bootloader
is zipl, since zipl expects the absolute path to be in the BLS snippet.

The kernel-install scripts takes care of this and modifies the BLS file
if needed, but grubby doesn't do that. So instead just generate the BLS
always even if there is one for the kernel version of the added entry.

Resolves: rhbz#1653365

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2018-12-01 02:02:16 +01:00

768 lines
20 KiB
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Executable File

#!/bin/bash
#
# grubby wrapper to manage BootLoaderSpec files
#
#
# Copyright 2018 Red Hat, Inc. All rights reserved.
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
readonly SCRIPTNAME="${0##*/}"
CMDLINE_LINUX_DEBUG=" systemd.log_level=debug systemd.log_target=kmsg"
LINUX_DEBUG_VERSION_POSTFIX="_with_debugging"
LINUX_DEBUG_TITLE_POSTFIX=" with debugging"
declare -a bls_file
declare -a bls_title
declare -a bls_version
declare -a bls_linux
declare -a bls_initrd
declare -a bls_options
declare -a bls_id
[[ -f /etc/sysconfig/kernel ]] && . /etc/sysconfig/kernel
[[ -f /etc/os-release ]] && . /etc/os-release
read MACHINE_ID < /etc/machine-id
arch=$(uname -m)
if [[ $arch = 's390' || $arch = 's390x' ]]; then
bootloader="zipl"
else
bootloader="grub2"
fi
print_error() {
echo "$1" >&2
exit 1
}
print_info() {
echo "$1" >&2
}
if [[ ${#} = 0 ]]; then
print_error "no action specified"
fi
get_bls_value() {
local bls="$1" && shift
local key="$1" && shift
echo "$(grep "^${key}[ \t]" "${bls}" | sed -e "s!^${key}[ \t]*!!")"
}
set_bls_value() {
local bls="$1" && shift
local key="$1" && shift
local value="$1" && shift
value=$(echo $value | sed -e 's/\//\\\//g')
sed -i -e "s/^${key}.*/${key} ${value}/" "${bls}"
}
append_bls_value() {
local bls="$1" && shift
local key="$1" && shift
local value="$1" && shift
old_value="$(get_bls_value "${bls}" ${key})"
set_bls_value "${bls}" "${key}" "${old_value}${value}"
}
get_bls_values() {
count=0
local -a files
local IFS=$'\n'
files=($(for bls in ${blsdir}/*.conf ; do
if ! [[ -e "${bls}" ]] ; then
continue
fi
bls="${bls%.conf}"
bls="${bls##*/}"
echo "${bls}"
done | /usr/libexec/grubby/rpm-sort -c rpmnvrcmp | tac)) || :
for bls in "${files[@]}" ; do
blspath="${blsdir}/${bls}.conf"
bls_file[$count]="${blspath}"
bls_title[$count]="$(get_bls_value ${blspath} title)"
bls_version[$count]="$(get_bls_value ${blspath} version)"
bls_linux[$count]="$(get_bls_value ${blspath} linux)"
bls_initrd[$count]="$(get_bls_value ${blspath} initrd)"
bls_options[$count]="$(get_bls_value ${blspath} options)"
bls_id[$count]="${bls}"
count=$((count+1))
done
}
get_default_index() {
local default=""
local index="-1"
local title=""
local version=""
if [[ $bootloader = "grub2" ]]; then
default="$(grep '^saved_entry=' ${env} | sed -e 's/^saved_entry=//')"
else
default="$(grep '^default=' ${zipl_config} | sed -e 's/^default=//')"
fi
if [[ -z $default ]]; then
index=0
elif [[ $default =~ ^[0-9]+$ ]]; then
index="$default"
fi
# GRUB2 and zipl use different fields to set the default entry
if [[ $bootloader = "grub2" ]]; then
id="$default"
else
title="$default"
fi
for i in ${!bls_file[@]}; do
if [[ $i -eq $index ]]; then
echo $i
return
fi
if [[ $bootloader = "grub2" && $id = ${bls_id[$i]} ]]; then
echo $i
return
fi
if [[ $bootloader = "zipl" && $title = ${bls_title[$i]} ]]; then
echo $i
return
fi
done
}
display_default_value() {
local prefix=$(get_prefix)
case "$display_default" in
kernel)
echo "${prefix}${bls_linux[$default_index]}"
exit 0
;;
index)
echo "$default_index"
exit 0
;;
title)
echo "${bls_title[$default_index]}"
exit 0
;;
esac
}
param_to_indexes() {
local param="$1"
local indexes=""
if [[ $param = "ALL" ]]; then
for i in ${!bls_file[@]}; do
indexes="$indexes $i"
done
echo -n $indexes
return
fi
if [[ $param = "DEFAULT" ]]; then
echo -n $default_index
return
fi
for i in ${!bls_file[@]}; do
if [[ $param = "${bls_linux[$i]}" || "/${param##*/}" = "${bls_linux[$i]}" ]]; then
indexes="$indexes $i"
fi
if [[ $param = "TITLE=${bls_title[$i]}" ]]; then
indexes="$indexes $i"
fi
if [[ $param = $i ]]; then
indexes="$indexes $i"
fi
done
if [[ -n $indexes ]]; then
echo -n $indexes
return
fi
echo -n "-1"
}
get_prefix() {
if [[ $bootloader = grub2 ]] && grep -q /boot /proc/mounts; then
echo "/boot"
else
echo ""
fi
}
expand_var() {
local var=$1
if [[ $bootloader == "grub2" ]]; then
local value="$(grub2-editenv "${env}" list | grep ${var##$} | sed -e "s/${var##$}=//")"
value="$(echo ${value} | sed -e 's/\//\\\//g')"
if [[ -n $value ]]; then
var="$value"
fi
fi
echo $var
}
display_info_values() {
local indexes=($(param_to_indexes "$1"))
local prefix=$(get_prefix)
if [[ $indexes = "-1" ]]; then
print_error "The param $1 is incorrect"
fi
for i in ${indexes[*]}; do
local root=""
local value=""
local args=${bls_options[$i]}
local opts=(${args})
for opt in ${opts[*]}; do
if [[ $opt =~ ^\$ ]]; then
value="$(expand_var $opt)"
args="$(echo ${args} | sed -e "s/${opt}/${value}/")"
fi
done
local opts=(${args})
for opt in ${opts[*]}; do
if echo $opt | grep -q "^root="; then
root="$(echo $opt | sed -e 's/root=//')"
value="$(echo ${opt} | sed -e 's/\//\\\//g')"
args="$(echo ${args} | sed -e "s/${value}[ \t]*//")"
break
fi
done
echo "index=$i"
echo "kernel=\"${prefix}${bls_linux[$i]}\""
echo "args=\"${args}\""
if [[ -n $root ]]; then
echo "root=\"${root}\""
fi
echo "initrd=\"${prefix}${bls_initrd[$i]}\""
echo "title=\"${bls_title[$i]}\""
echo "id=\"${bls_id[$i]}\""
done
exit 0
}
mkbls() {
local kernel=$1 && shift
local kernelver=$1 && shift
local datetime=$1 && shift
local debugname=""
local flavor=""
local prefix=""
if [[ $(get_prefix) = "" ]]; then
prefix="/boot"
fi
if [[ $kernelver == *\+* ]] ; then
local flavor=-"${kernelver##*+}"
if [[ $flavor == "-debug" ]]; then
local debugname="with debugging"
local debugid="-debug"
fi
fi
cat <<EOF
title ${NAME} (${kernelver}) ${VERSION}${debugname}
version ${kernelver}${debugid}
linux ${kernel}
initrd ${prefix}/initramfs-${kernelver}.img
options \$kernelopts
id ${ID}-${datetime}-${kernelver}${debugid}
grub_users \$grub_users
grub_arg --unrestricted
grub_class kernel${flavor}
EOF
}
remove_bls_fragment() {
local indexes=($(param_to_indexes "$1"))
if [[ $indexes = "-1" ]]; then
print_error "The param $1 is incorrect"
fi
for i in "${indexes[@]}"; do
rm -f "${bls_file[$i]}"
done
get_bls_values
update_grubcfg
}
get_custom_bls_filename() {
local kernelver=$1
local bls_target="${blsdir}/${MACHINE_ID}-${kernelver}.conf"
count=0
local -a files
local IFS=$'\n'
prefix="${bls_target%%.conf}"
prefix="${bls_target%%${arch}}"
prefix="${prefix%.*}"
last=($(for bls in ${prefix}.*~custom*.conf ; do
if ! [[ -e "${bls}" ]] ; then
continue
fi
bls="${bls##${prefix}.}"
bls="${bls%%~custom*}"
echo "${bls}"
done | tail -n1)) || :
if [[ -z $last ]]; then
last="0"
else
last=$((last+1))
fi
echo "${bls_target}" | sed -e "s!${prefix}!${prefix}.${last}~custom!"
}
add_bls_fragment() {
local kernel="$1" && shift
local title="$1" && shift
local options="$1" && shift
local initrd="$1" && shift
local extra_initrd="$1" && shift
if [[ $kernel = *"vmlinuz-"* ]]; then
kernelver="${kernel##*/vmlinuz-}"
prefix="vmlinuz-"
else
kernelver="${kernel##*/}"
fi
if [[ ! -f "/boot/${prefix}${kernelver}" ]] &&
[[ $bad_image != "true" ]]; then
print_error "The ${kernelver} kernel isn't installed in the machine"
fi
if [[ -z $title ]]; then
print_error "The kernel title must be specified"
fi
if [[ ! -d $blsdir ]]; then
install -m 700 -d "${blsdir}"
fi
bls_target="${blsdir}/${MACHINE_ID}-${kernelver}.conf"
if [[ -e ${bls_target} ]]; then
bls_target="$(get_custom_bls_filename "${kernelver}")"
print_info "An entry for kernel ${kernelver} already exists, adding ${bls_target}"
fi
kernel_dir="/lib/modules/${kernelver}"
if [[ -d $kernel_dir ]]; then
datetime="$(date -u +%Y%m%d%H%M%S -d "$(stat -c '%y' "${kernel_dir}")")"
else
datetime=0
fi
mkbls "${kernel}" "${kernelver}" "${datetime}" > "${bls_target}"
if [[ -n $title ]]; then
set_bls_value "${bls_target}" "title" "${title}"
fi
if [[ -n $options ]]; then
set_bls_value "${bls_target}" "options" "${options}"
fi
if [[ -n $initrd ]]; then
set_bls_value "${bls_target}" "initrd" "${initrd}"
fi
if [[ -n $extra_initrd ]]; then
append_bls_value "${bls_target}" "initrd" "${extra_initrd}"
fi
if [[ $MAKEDEBUG = "yes" ]]; then
bls_debug="$(echo ${bls_target} | sed -e "s/${kernelver}/${kernelver}~debug/")"
cp -aT "${bls_target}" "${bls_debug}"
append_bls_value "${bls_debug}" "title" "${LINUX_DEBUG_TITLE_POSTFIX}"
append_bls_value "${bls_debug}" "version" "${LINUX_DEBUG_VERSION_POSTFIX}"
append_bls_value "${bls_debug}" "options" "${CMDLINE_LINUX_DEBUG}"
blsid="$(get_bls_value ${bls_debug} "id" | sed -e "s/${kernelver}/${kernelver}~debug/")"
set_bls_value "${bls_debug}" "id" "${blsid}"
fi
get_bls_values
if [[ $make_default = "true" ]]; then
set_default_bls "TITLE=${title}"
fi
update_grubcfg
exit 0
}
update_args() {
local args=$1 && shift
local remove_args=($1) && shift
local add_args=($1) && shift
for arg in ${remove_args[*]}; do
if [[ $arg = *"="* ]]; then
arg=$(echo $arg | sed -e 's/\//\\\//g')
args="$(echo $args | sed -E "s/(^|[[:space:]])$arg([[:space:]]|$)/ /")"
else
args="$(echo $args | sed -E "s/(^|[[:space:]])$arg(([[:space:]]|$)|([=][^ ]*([$]*)))/ /g")"
fi
done
for arg in ${add_args[*]}; do
arg=${arg%=*}
args="$(echo $args | sed -E "s/(^|[[:space:]])$arg(([[:space:]]|$)|([=][^ ]*([$]*)))/ /g")"
done
for arg in ${add_args[*]}; do
args="$args $arg"
done
echo ${args}
}
get_bls_args() {
if [[ $bootloader = "grub2" && "${bls_options[$i]}" = "\$kernelopts" ]]; then
old_args=$(grub2-editenv "${env}" list | grep kernelopts)
old_args="${old_args##kernelopts=}"
else
old_args="${bls_options[$i]}"
fi
echo ${old_args}
}
update_bls_fragment() {
local indexes=($(param_to_indexes "$1")) && shift
local remove_args=$1 && shift
local add_args=$1 && shift
local initrd=$1 && shift
if [[ $indexes = "-1" ]]; then
print_error "The param $1 is incorrect"
fi
for i in ${indexes[*]}; do
if [[ -n $remove_args || -n $add_args ]]; then
local old_args="$(get_bls_args "$i")"
local new_args="$(update_args "${old_args}" "${remove_args}" "${add_args}")"
set_bls_value "${bls_file[$i]}" "options" "${new_args}"
fi
if [[ -n $initrd ]]; then
set_bls_value "${bls_file[$i]}" "initrd" "${initrd}"
fi
done
update_grubcfg
}
set_default_bls() {
local index=($(param_to_indexes "$1"))
if [[ $index = "-1" ]]; then
print_error "The param $1 is incorrect"
fi
if [[ $bootloader = grub2 ]]; then
grub2-editenv "${env}" set saved_entry="${bls_id[$index]}"
else
local default="${bls_title[$index]}"
local current="$(grep '^default=' ${zipl_config} | sed -e 's/^default=//')"
if [[ -n $current ]]; then
sed -i -e "s,^default=.*,default=${default}," "${zipl_config}"
else
echo "default=${default}" >> "${zipl_config}"
fi
fi
print_info "The default is ${bls_file[$index]} with index $index and kernel $(get_prefix)${bls_linux[$index]}"
}
remove_var_prefix() {
if [[ -n $remove_kernel && $remove_kernel =~ ^/ ]]; then
remove_kernel="/${remove_kernel##*/}"
fi
if [[ -n $initrd ]]; then
initrd="/${initrd##*/}"
fi
if [[ -n $extra_initrd ]]; then
extra_initrd=" /${extra_initrd##*/}"
fi
if [[ -n $kernel ]]; then
kernel="/${kernel##*/}"
fi
if [[ -n $update_kernel && $update_kernel =~ ^/ ]]; then
update_kernel="/${update_kernel##*/}"
fi
}
update_grubcfg()
{
if [[ $arch = 'ppc64' || $arch = 'ppc64le' ]]; then
grub2-mkconfig -o /boot/grub2/grub.cfg >& /dev/null
fi
}
print_usage()
{
cat <<EOF
Usage: grubby [OPTION...]
--add-kernel=kernel-path add an entry for the specified kernel
--args=args default arguments for the new kernel or new arguments for kernel being updated)
--bad-image-okay don't sanity check images in boot entries (for testing only)
-c, --config-file=path path to grub config file to update ("-" for stdin)
--copy-default use the default boot entry as a template for the new entry being added; if the default is not a linux image, or if the kernel referenced by the default image does not exist, the
first linux entry whose kernel does exist is used as the template
--default-kernel display the path of the default kernel
--default-index display the index of the default kernel
--default-title display the title of the default kernel
--env=path path for environment data
--grub2 configure grub2 bootloader
--info=kernel-path display boot information for specified kernel
--initrd=initrd-path initrd image for the new kernel
-i, --extra-initrd=initrd-path auxiliary initrd image for things other than the new kernel
--make-default make the newly added entry the default boot entry
-o, --output-file=path path to output updated config file ("-" for stdout)
--remove-args=STRING remove kernel arguments
--remove-kernel=kernel-path remove all entries for the specified kernel
--set-default=kernel-path make the first entry referencing the specified kernel the default
--set-default-index=entry-index make the given entry index the default entry
--title=entry-title title to use for the new kernel entry
--update-kernel=kernel-path updated information for the specified kernel
--zipl configure zipl bootloader
-b, --bls-directory path to directory containing the BootLoaderSpec fragment files
Help options:
-?, --help Show this help message
EOF
}
OPTS="$(getopt -o c:i:o:b:? --long help,add-kernel:,args:,bad-image-okay,\
config-file:,copy-default,default-kernel,default-index,default-title,env:,\
grub2,info:,initrd:,extra-initrd:,make-default,output-file:,remove-args:,\
remove-kernel:,set-default:,set-default-index:,title:,update-kernel:,zipl,\
bls-directory:,add-kernel:,add-multiboot:,mbargs:,mounts:,boot-filesystem:,\
bootloader-probe,debug,devtree,devtreedir:,elilo,efi,extlinux,grub,lilo,\
output-file:,remove-mbargs:,remove-multiboot:,silo,yaboot -n ${SCRIPTNAME} -- "$@")"
[[ $? = 0 ]] || exit 1
eval set -- "$OPTS"
while [ ${#} -gt 0 ]; do
case "$1" in
--help|-h)
print_usage
exit 0
;;
--add-kernel)
kernel="${2}"
shift
;;
--args)
args="${2}"
shift
;;
--bad-image-okay)
bad_image=true
;;
--config-file|-c)
zipl_config="${2}"
shift
;;
--copy-default)
copy_default=true
;;
--default-kernel)
display_default="kernel"
;;
--default-index)
display_default="index"
;;
--default-title)
display_default="title"
;;
--env)
env="${2}"
shift
;;
--grub2)
bootloader="grub2"
;;
--info)
display_info="${2}"
shift
;;
--initrd)
initrd="${2}"
shift
;;
--extra-initrd|-i)
extra_initrd=" /${2}"
shift
;;
--make-default)
make_default=true
;;
--output-file|-o)
output_file="${2}"
shift
;;
--remove-args)
remove_args="${2}"
shift
;;
--remove-kernel)
remove_kernel="${2}"
shift
;;
--set-default)
set_default="${2}"
shift
;;
--set-default-index)
set_default="${2}"
shift
;;
--title)
title="${2}"
shift
;;
--update-kernel)
update_kernel="${2}"
shift
;;
--zipl)
bootloader="zipl"
;;
--bls-directory|-b)
blsdir="${2}"
shift
;;
--add-kernel|--add-multiboot|--mbargs|--mounts|--boot-filesystem|\
--bootloader-probe|--debug|--devtree|--devtreedir|--elilo|--efi|\
--extlinux|--grub|--lilo|--output-file|--remove-mbargs|--silo|\
--remove-multiboot|--slilo|--yaboot)
echo
echo "${SCRIPTNAME}: the option \"${1}\" was deprecated" >&2
echo "Try '${SCRIPTNAME} --help' to list supported options" >&2
echo
exit 1
;;
--)
shift
break
;;
*)
echo
echo "${SCRIPTNAME}: invalid option \"${1}\"" >&2
echo "Try '${SCRIPTNAME} --help' for more information" >&2
echo
exit 1
;;
esac
shift
done
if [[ -z $blsdir ]]; then
blsdir="/boot/loader/entries"
fi
if [[ -z $env ]]; then
env="/boot/grub2/grubenv"
fi
if [[ -z $zipl_config ]]; then
zipl_config="/etc/zipl.conf"
fi
get_bls_values
default_index="$(get_default_index)"
if [[ -n $display_default ]]; then
display_default_value
fi
if [[ -n $display_info ]]; then
display_info_values "${display_info}"
fi
if [[ $(get_prefix) == "/boot" ]]; then
remove_var_prefix
fi
if [[ -n $kernel ]]; then
if [[ $copy_default = "true" ]]; then
opts="${bls_options[$default_index]}"
if [[ -n $args ]]; then
opts="${opts} ${args}"
fi
else
opts="${args}"
fi
add_bls_fragment "${kernel}" "${title}" "${opts}" "${initrd}" \
"${extra_initrd}"
fi
if [[ -n $remove_kernel ]]; then
remove_bls_fragment "${remove_kernel}"
fi
if [[ -n $update_kernel ]]; then
update_bls_fragment "${update_kernel}" "${remove_args}" "${args}" "${initrd}"
fi
if [[ -n $set_default ]]; then
set_default_bls "${set_default}"
fi
exit 0