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grubby-bls: make --update-kernel ALL to update kernelopts var in grubenv 

Currently there's no way to update the kernelopts variable defined in the
grubenv by using the grubby wrapper. Updating it with grub2-editenv - set
is tedious and error prone so let's use --update-kernel=ALL option for it.

This command currently iterates over all the BLS entries and update them
individually, but makes more sense to update the kernelopts grubenv var
and only update the BLS entries that don't have the $kernelopts var in
their options field.

If after an update one of these BLS entries have exactly the same params
in their options field than the ones set in $kernelopts, set the options
field to $kernelopts again since the parameters have converged again.

That way the modified BLS entries will only have a custom options field
while its value diverged from the $kernelopts defined in grubenv.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
This commit is contained in:
Javier Martinez Canillas 2019-02-28 13:01:40 +01:00
parent 40d73389b4
commit 6abeb6fc77
No known key found for this signature in database
GPG Key ID: C751E590D63F3D69
2 changed files with 34 additions and 3 deletions
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32
grubby-bls
View File

@ -218,8 +218,20 @@ expand_var() {
echo $var
}
has_kernelopts()
{
local args=${bls_options[$1]}
local opts=(${args})
for opt in ${opts[*]}; do
[[ $opt = "\$kernelopts" ]] && return 0
done
return 1
}
get_bls_args() {
local args=${bls_options[$i]}
local args=${bls_options[$1]}
local opts=(${args})
for opt in ${opts[*]}; do
@ -473,16 +485,32 @@ update_bls_fragment() {
local remove_args=$1 && shift
local add_args=$1 && shift
local initrd=$1 && shift
local opts
if [[ $indexes = "-1" ]]; then
print_error "The param $(get_prefix)${param} is incorrect"
fi
if [[ $param = "ALL" && $bootloader = grub2 ]] && [[ -n $remove_args || -n $add_args ]]; then
local old_args="$(grub2-editenv "${env}" list | grep kernelopts | sed -e "s/kernelopts=//")"
opts="$(update_args "${old_args}" "${remove_args}" "${add_args}")"
grub2-editenv "${env}" set kernelopts="${opts}"
elif [[ $bootloader = grub2 ]]; then
opts="$(grub2-editenv "${env}" list | grep kernelopts | sed -e "s/kernelopts=//")"
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}"
if [[ $param != "ALL" || ! "$(has_kernelopts "$i")" ]]; then
set_bls_value "${bls_file[$i]}" "options" "${new_args}"
fi
if [[ $bootloader = grub2 && ! "$(has_kernelopts "$i")" && $opts = $new_args ]]; then
set_bls_value "${bls_file[$i]}" "options" "\$kernelopts"
fi
fi
if [[ -n $initrd ]]; then

5
grubby.spec
View File

@ -1,6 +1,6 @@
Name: grubby
Version: 8.40
Release: 27%{?dist}
Release: 28%{?dist}
Summary: Command line tool for updating bootloader configs
License: GPLv2+
URL: https://github.com/rhinstaller/grubby
@ -132,6 +132,9 @@ current boot environment.
%{_mandir}/man8/*.8*
%changelog
* Fri Mar 01 2019 Javier Martinez Canillas <javierm@redhat.com> - 8.40-28
- grubby-bls: make --update-kernel ALL to update kernelopts var in grubenv
* Thu Feb 14 2019 Javier Martinez Canillas <javierm@redhat.com> - 8.40-27
- grubby-bls: error if args or remove-args is used without update-kernel