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diff --git a/python/vyos/system/grub.py b/python/vyos/system/grub.py
index faf68c2d1..daddb799a 100644
--- a/python/vyos/system/grub.py
+++ b/python/vyos/system/grub.py
@@ -1,464 +1,464 @@
# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
import platform
from pathlib import Path
from re import MULTILINE, compile as re_compile
from shutil import copy2
from uuid import uuid5, NAMESPACE_URL, UUID
from vyos.template import render
from vyos.utils.process import cmd, rc_cmd
from vyos.system import disk
# Define variables
GRUB_DIR_MAIN: str = '/boot/grub'
GRUB_CFG_MAIN: str = f'{GRUB_DIR_MAIN}/grub.cfg'
GRUB_DIR_VYOS: str = f'{GRUB_DIR_MAIN}/grub.cfg.d'
CFG_VYOS_HEADER: str = f'{GRUB_DIR_VYOS}/00-vyos-header.cfg'
CFG_VYOS_MODULES: str = f'{GRUB_DIR_VYOS}/10-vyos-modules-autoload.cfg'
CFG_VYOS_VARS: str = f'{GRUB_DIR_VYOS}/20-vyos-defaults-autoload.cfg'
CFG_VYOS_COMMON: str = f'{GRUB_DIR_VYOS}/25-vyos-common-autoload.cfg'
CFG_VYOS_PLATFORM: str = f'{GRUB_DIR_VYOS}/30-vyos-platform-autoload.cfg'
CFG_VYOS_MENU: str = f'{GRUB_DIR_VYOS}/40-vyos-menu-autoload.cfg'
CFG_VYOS_OPTIONS: str = f'{GRUB_DIR_VYOS}/50-vyos-options.cfg'
GRUB_DIR_VYOS_VERS: str = f'{GRUB_DIR_VYOS}/vyos-versions'
TMPL_VYOS_VERSION: str = 'grub/grub_vyos_version.j2'
TMPL_GRUB_VARS: str = 'grub/grub_vars.j2'
TMPL_GRUB_MAIN: str = 'grub/grub_main.j2'
TMPL_GRUB_MENU: str = 'grub/grub_menu.j2'
TMPL_GRUB_MODULES: str = 'grub/grub_modules.j2'
TMPL_GRUB_OPTS: str = 'grub/grub_options.j2'
TMPL_GRUB_COMMON: str = 'grub/grub_common.j2'
# default boot options
BOOT_OPTS_STEM: str = 'boot=live rootdelay=5 noautologin net.ifnames=0 biosdevname=0 vyos-union=/boot/'
# prepare regexes
-REGEX_GRUB_VARS: str = r'^set (?P<variable_name>.+)=[\'"]?(?P<variable_value>.*)(?<![\'"])[\'"]?$'
+REGEX_GRUB_VARS: str = r'^set (?P<variable_name>\w+)=[\'"]?(?P<variable_value>.*)(?<![\'"])[\'"]?$'
REGEX_GRUB_MODULES: str = r'^insmod (?P<module_name>.+)$'
REGEX_KERNEL_CMDLINE: str = r'^BOOT_IMAGE=/(?P<boot_type>boot|live)/((?P<image_version>.+)/)?vmlinuz.*$'
REGEX_GRUB_BOOT_OPTS: str = r'^\s*set boot_opts="(?P<boot_opts>[^$]+)"$'
def install(drive_path: str, boot_dir: str, efi_dir: str, id: str = 'VyOS', chroot : str = "") -> None:
"""Install GRUB for both BIOS and EFI modes (hybrid boot)
Args:
drive_path (str): path to a drive where GRUB must be installed
boot_dir (str): a path to '/boot' directory
efi_dir (str): a path to '/boot/efi' directory
"""
if chroot:
chroot_cmd = f"chroot {chroot}"
else:
chroot_cmd = ""
efi_installation_arch = "x86_64"
if platform.machine() == "aarch64":
efi_installation_arch = "arm64"
elif platform.machine() == "x86_64":
cmd(
f'{chroot_cmd} grub-install --no-floppy --target=i386-pc \
--boot-directory={boot_dir} {drive_path} --force'
)
cmd(
f'{chroot_cmd} grub-install --no-floppy --recheck --target={efi_installation_arch}-efi \
--force-extra-removable --boot-directory={boot_dir} \
--efi-directory={efi_dir} --bootloader-id="{id}" \
--no-uefi-secure-boot'
)
def gen_version_uuid(version_name: str) -> str:
"""Generate unique ID from version name
Use UUID5 / NAMESPACE_URL with prefix `uuid5-`
Args:
version_name (str): version name
Returns:
str: generated unique ID
"""
ver_uuid: UUID = uuid5(NAMESPACE_URL, version_name)
ver_id: str = f'uuid5-{ver_uuid}'
return ver_id
def version_add(version_name: str,
root_dir: str = '',
boot_opts: str = '',
boot_opts_config = None) -> None:
"""Add a new VyOS version to GRUB loader configuration
Args:
vyos_version (str): VyOS version name
root_dir (str): an optional path to the root directory.
Defaults to empty.
boot_opts (str): an optional boot options for Linux kernel.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
version_config: str = f'{root_dir}/{GRUB_DIR_VYOS_VERS}/{version_name}.cfg'
render(
version_config, TMPL_VYOS_VERSION, {
'version_name': version_name,
'version_uuid': gen_version_uuid(version_name),
'boot_opts_default': BOOT_OPTS_STEM + version_name,
'boot_opts': boot_opts,
'boot_opts_config': boot_opts_config
})
def version_del(vyos_version: str, root_dir: str = '') -> None:
"""Delete a VyOS version from GRUB loader configuration
Args:
vyos_version (str): VyOS version name
root_dir (str): an optional path to the root directory.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
version_config: str = f'{root_dir}/{GRUB_DIR_VYOS_VERS}/{vyos_version}.cfg'
Path(version_config).unlink(missing_ok=True)
def version_list(root_dir: str = '') -> list[str]:
"""Generate a list with installed VyOS versions
Args:
root_dir (str): an optional path to the root directory.
Defaults to empty.
Returns:
list: A list with versions names
N.B. coreutils stat reports st_birthtime, but not available in
Path.stat()/os.stat()
"""
if not root_dir:
root_dir = disk.find_persistence()
versions_files = Path(f'{root_dir}/{GRUB_DIR_VYOS_VERS}').glob('*.cfg')
versions_order: dict[str, int] = {}
for file in versions_files:
p = Path(root_dir).joinpath('boot').joinpath(file.stem)
command = f'stat -c %W {p.as_posix()}'
rc, out = rc_cmd(command)
if rc == 0:
versions_order[file.stem] = int(out)
versions_order = sorted(versions_order, key=versions_order.get, reverse=True)
versions_list: list[str] = list(versions_order)
return versions_list
def read_env(env_file: str = '') -> dict[str, str]:
"""Read GRUB environment
Args:
env_file (str, optional): a path to grub environment file.
Defaults to empty.
Returns:
dict: dictionary with GRUB environment
"""
if not env_file:
root_dir: str = disk.find_persistence()
env_file = f'{root_dir}/{GRUB_DIR_MAIN}/grubenv'
env_content: str = cmd(f'grub-editenv {env_file} list').splitlines()
regex_filter = re_compile(r'^(?P<variable_name>.*)=(?P<variable_value>.*)$')
env_dict: dict[str, str] = {}
for env_item in env_content:
search_result = regex_filter.fullmatch(env_item)
if search_result:
search_result_dict: dict[str, str] = search_result.groupdict()
variable_name: str = search_result_dict.get('variable_name', '')
variable_value: str = search_result_dict.get('variable_value', '')
if variable_name and variable_value:
env_dict.update({variable_name: variable_value})
return env_dict
def get_cfg_ver(root_dir: str = '') -> int:
"""Get current version of GRUB configuration
Args:
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
Returns:
int: a configuration version
"""
if not root_dir:
root_dir = disk.find_persistence()
cfg_ver: str = vars_read(f'{root_dir}/{CFG_VYOS_HEADER}').get(
'VYOS_CFG_VER')
if cfg_ver:
cfg_ver_int: int = int(cfg_ver)
else:
cfg_ver_int: int = 0
return cfg_ver_int
def write_cfg_ver(cfg_ver: int, root_dir: str = '') -> None:
"""Write version number of GRUB configuration
Args:
cfg_ver (int): a version number to write
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
Returns:
int: a configuration version
"""
if not root_dir:
root_dir = disk.find_persistence()
vars_file: str = f'{root_dir}/{CFG_VYOS_HEADER}'
vars_current: dict[str, str] = vars_read(vars_file)
vars_current['VYOS_CFG_VER'] = str(cfg_ver)
vars_write(vars_file, vars_current)
def vars_read(grub_cfg: str) -> dict[str, str]:
"""Read variables from a GRUB configuration file
Args:
grub_cfg (str): a path to the GRUB config file
Returns:
dict: a dictionary with variables and values
"""
vars_dict: dict[str, str] = {}
regex_filter = re_compile(REGEX_GRUB_VARS)
try:
config_text: list[str] = Path(grub_cfg).read_text().splitlines()
except FileNotFoundError:
return vars_dict
for line in config_text:
search_result = regex_filter.fullmatch(line)
if search_result:
search_dict = search_result.groupdict()
variable_name: str = search_dict.get('variable_name', '')
variable_value: str = search_dict.get('variable_value', '')
if variable_name and variable_value:
vars_dict.update({variable_name: variable_value})
return vars_dict
def modules_read(grub_cfg: str) -> list[str]:
"""Read modules list from a GRUB configuration file
Args:
grub_cfg (str): a path to the GRUB config file
Returns:
list: a list with modules to load
"""
mods_list: list[str] = []
regex_filter = re_compile(REGEX_GRUB_MODULES, MULTILINE)
try:
config_text = Path(grub_cfg).read_text()
except FileNotFoundError:
return mods_list
mods_list = regex_filter.findall(config_text)
return mods_list
def modules_write(grub_cfg: str, mods_list: list[str]) -> None:
"""Write modules list to a GRUB configuration file (overwrite everything)
Args:
grub_cfg (str): a path to GRUB configuration file
mods_list (list): a list with modules to load
"""
render(grub_cfg, TMPL_GRUB_MODULES, {'mods_list': mods_list})
def vars_write(grub_cfg: str, grub_vars: dict[str, str]) -> None:
"""Write variables to a GRUB configuration file (overwrite everything)
Args:
grub_cfg (str): a path to GRUB configuration file
grub_vars (dict): a dictionary with new variables
"""
render(grub_cfg, TMPL_GRUB_VARS, {'vars': grub_vars})
def get_boot_opts(version_name: str, root_dir: str = '') -> str:
"""Read boot_opts setting from version file; return default setting on
any failure.
Args:
version_name (str): version name
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
boot_opts_default: str = BOOT_OPTS_STEM + version_name
boot_opts: str = ''
regex_filter = re_compile(REGEX_GRUB_BOOT_OPTS)
version_config: str = f'{root_dir}/{GRUB_DIR_VYOS_VERS}/{version_name}.cfg'
try:
config_text: list[str] = Path(version_config).read_text().splitlines()
except FileNotFoundError:
return boot_opts_default
for line in config_text:
search_result = regex_filter.fullmatch(line)
if search_result:
search_dict = search_result.groupdict()
boot_opts = search_dict.get('boot_opts', '')
break
if not boot_opts:
boot_opts = boot_opts_default
return boot_opts
def set_default(version_name: str, root_dir: str = '') -> None:
"""Set version as default boot entry
Args:
version_name (str): version name
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
vars_file = f'{root_dir}/{CFG_VYOS_VARS}'
vars_current = vars_read(vars_file)
vars_current['default'] = gen_version_uuid(version_name)
vars_write(vars_file, vars_current)
def common_write(root_dir: str = '', grub_common: dict[str, str] = {}) -> None:
"""Write common GRUB configuration file (overwrite everything)
Args:
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
common_config = f'{root_dir}/{CFG_VYOS_COMMON}'
render(common_config, TMPL_GRUB_COMMON, grub_common)
def create_structure(root_dir: str = '') -> None:
"""Create GRUB directories structure
Args:
root_dir (str, optional): an optional path to the root directory.
Defaults to ''.
"""
if not root_dir:
root_dir = disk.find_persistence()
Path(f'{root_dir}/{GRUB_DIR_VYOS_VERS}').mkdir(parents=True, exist_ok=True)
def set_console_type(console_type: str, root_dir: str = '') -> None:
"""Write default console type to GRUB configuration
Args:
console_type (str): a default console type
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
vars_file: str = f'{root_dir}/{CFG_VYOS_VARS}'
vars_current: dict[str, str] = vars_read(vars_file)
vars_current['console_type'] = str(console_type)
vars_write(vars_file, vars_current)
def set_console_speed(console_speed: str, root_dir: str = '') -> None:
"""Write default console speed to GRUB configuration
Args:
console_speed (str): default console speed
root_dir (str, optional): an optional path to the root directory.
Defaults to empty.
"""
if not root_dir:
root_dir = disk.find_persistence()
vars_file: str = f'{root_dir}/{CFG_VYOS_VARS}'
vars_current: dict[str, str] = vars_read(vars_file)
vars_current['console_speed'] = str(console_speed)
vars_write(vars_file, vars_current)
def set_kernel_cmdline_options(cmdline_options: str, version_name: str,
root_dir: str = '') -> None:
"""Write additional cmdline options to GRUB configuration
Args:
cmdline_options (str): cmdline options to add to default boot line
version_name (str): image version name
root_dir (str, optional): an optional path to the root directory.
"""
if not root_dir:
root_dir = disk.find_persistence()
version_add(version_name=version_name, root_dir=root_dir,
boot_opts_config=cmdline_options)
def sort_inodes(dir_path: str) -> None:
"""Sort inodes for files inside a folder
Regenerate inodes for each file to get the same order for both inodes
and file names
GRUB iterates files by inodes, not alphabetically. Therefore, if we
want to read them in proper order, we need to sort inodes for all
config files in a folder.
Args:
dir_path (str): a path to directory
"""
dir_content: list[Path] = sorted(Path(dir_path).iterdir())
temp_list_old: list[Path] = []
temp_list_new: list[Path] = []
# create a copy of all files, to get new inodes
for item in dir_content:
# skip directories
if item.is_dir():
continue
# create a new copy of file with a temporary name
copy_path = Path(f'{item.as_posix()}_tmp')
copy2(item, Path(copy_path))
temp_list_old.append(item)
temp_list_new.append(copy_path)
# delete old files and rename new ones
for item in temp_list_old:
item.unlink()
for item in temp_list_new:
new_name = Path(f'{item.as_posix()[0:-4]}')
item.rename(new_name)

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