e2be5dc1f4
Catch and ignore errors during writing of the boot entries. These errors could stem from profile names that are not valid filenames on vfat filesystems. fixes #114552
259 lines
10 KiB
Python
259 lines
10 KiB
Python
#! @python3@/bin/python3 -B
|
|
import argparse
|
|
import shutil
|
|
import os
|
|
import sys
|
|
import errno
|
|
import subprocess
|
|
import glob
|
|
import tempfile
|
|
import errno
|
|
import warnings
|
|
import ctypes
|
|
libc = ctypes.CDLL("libc.so.6")
|
|
import re
|
|
import datetime
|
|
import glob
|
|
import os.path
|
|
|
|
def copy_if_not_exists(source, dest):
|
|
if not os.path.exists(dest):
|
|
shutil.copyfile(source, dest)
|
|
|
|
def system_dir(profile, generation):
|
|
if profile:
|
|
return "/nix/var/nix/profiles/system-profiles/%s-%d-link" % (profile, generation)
|
|
else:
|
|
return "/nix/var/nix/profiles/system-%d-link" % (generation)
|
|
|
|
BOOT_ENTRY = """title NixOS{profile}
|
|
version Generation {generation} {description}
|
|
linux {kernel}
|
|
initrd {initrd}
|
|
options {kernel_params}
|
|
"""
|
|
|
|
# The boot loader entry for memtest86.
|
|
#
|
|
# TODO: This is hard-coded to use the 64-bit EFI app, but it could probably
|
|
# be updated to use the 32-bit EFI app on 32-bit systems. The 32-bit EFI
|
|
# app filename is BOOTIA32.efi.
|
|
MEMTEST_BOOT_ENTRY = """title MemTest86
|
|
efi /efi/memtest86/BOOTX64.efi
|
|
"""
|
|
|
|
def write_loader_conf(profile, generation):
|
|
with open("@efiSysMountPoint@/loader/loader.conf.tmp", 'w') as f:
|
|
if "@timeout@" != "":
|
|
f.write("timeout @timeout@\n")
|
|
if profile:
|
|
f.write("default nixos-%s-generation-%d.conf\n" % (profile, generation))
|
|
else:
|
|
f.write("default nixos-generation-%d.conf\n" % (generation))
|
|
if not @editor@:
|
|
f.write("editor 0\n");
|
|
f.write("console-mode @consoleMode@\n");
|
|
os.rename("@efiSysMountPoint@/loader/loader.conf.tmp", "@efiSysMountPoint@/loader/loader.conf")
|
|
|
|
def profile_path(profile, generation, name):
|
|
return os.readlink("%s/%s" % (system_dir(profile, generation), name))
|
|
|
|
def copy_from_profile(profile, generation, name, dry_run=False):
|
|
store_file_path = profile_path(profile, generation, name)
|
|
suffix = os.path.basename(store_file_path)
|
|
store_dir = os.path.basename(os.path.dirname(store_file_path))
|
|
efi_file_path = "/efi/nixos/%s-%s.efi" % (store_dir, suffix)
|
|
if not dry_run:
|
|
copy_if_not_exists(store_file_path, "@efiSysMountPoint@%s" % (efi_file_path))
|
|
return efi_file_path
|
|
|
|
def describe_generation(generation_dir):
|
|
try:
|
|
with open("%s/nixos-version" % generation_dir) as f:
|
|
nixos_version = f.read()
|
|
except IOError:
|
|
nixos_version = "Unknown"
|
|
|
|
kernel_dir = os.path.dirname(os.path.realpath("%s/kernel" % generation_dir))
|
|
module_dir = glob.glob("%s/lib/modules/*" % kernel_dir)[0]
|
|
kernel_version = os.path.basename(module_dir)
|
|
|
|
build_time = int(os.path.getctime(generation_dir))
|
|
build_date = datetime.datetime.fromtimestamp(build_time).strftime('%F')
|
|
|
|
description = "NixOS {}, Linux Kernel {}, Built on {}".format(
|
|
nixos_version, kernel_version, build_date
|
|
)
|
|
|
|
return description
|
|
|
|
def write_entry(profile, generation, machine_id):
|
|
kernel = copy_from_profile(profile, generation, "kernel")
|
|
initrd = copy_from_profile(profile, generation, "initrd")
|
|
try:
|
|
append_initrd_secrets = profile_path(profile, generation, "append-initrd-secrets")
|
|
subprocess.check_call([append_initrd_secrets, "@efiSysMountPoint@%s" % (initrd)])
|
|
except FileNotFoundError:
|
|
pass
|
|
if profile:
|
|
entry_file = "@efiSysMountPoint@/loader/entries/nixos-%s-generation-%d.conf" % (profile, generation)
|
|
else:
|
|
entry_file = "@efiSysMountPoint@/loader/entries/nixos-generation-%d.conf" % (generation)
|
|
generation_dir = os.readlink(system_dir(profile, generation))
|
|
tmp_path = "%s.tmp" % (entry_file)
|
|
kernel_params = "init=%s/init " % generation_dir
|
|
|
|
with open("%s/kernel-params" % (generation_dir)) as params_file:
|
|
kernel_params = kernel_params + params_file.read()
|
|
with open(tmp_path, 'w') as f:
|
|
f.write(BOOT_ENTRY.format(profile=" [" + profile + "]" if profile else "",
|
|
generation=generation,
|
|
kernel=kernel,
|
|
initrd=initrd,
|
|
kernel_params=kernel_params,
|
|
description=describe_generation(generation_dir)))
|
|
if machine_id is not None:
|
|
f.write("machine-id %s\n" % machine_id)
|
|
os.rename(tmp_path, entry_file)
|
|
|
|
def mkdir_p(path):
|
|
try:
|
|
os.makedirs(path)
|
|
except OSError as e:
|
|
if e.errno != errno.EEXIST or not os.path.isdir(path):
|
|
raise
|
|
|
|
def get_generations(profile=None):
|
|
gen_list = subprocess.check_output([
|
|
"@nix@/bin/nix-env",
|
|
"--list-generations",
|
|
"-p",
|
|
"/nix/var/nix/profiles/%s" % ("system-profiles/" + profile if profile else "system"),
|
|
"--option", "build-users-group", ""],
|
|
universal_newlines=True)
|
|
gen_lines = gen_list.split('\n')
|
|
gen_lines.pop()
|
|
|
|
configurationLimit = @configurationLimit@
|
|
return [ (profile, int(line.split()[0])) for line in gen_lines ][-configurationLimit:]
|
|
|
|
def remove_old_entries(gens):
|
|
rex_profile = re.compile("^@efiSysMountPoint@/loader/entries/nixos-(.*)-generation-.*\.conf$")
|
|
rex_generation = re.compile("^@efiSysMountPoint@/loader/entries/nixos.*-generation-(.*)\.conf$")
|
|
known_paths = []
|
|
for gen in gens:
|
|
known_paths.append(copy_from_profile(*gen, "kernel", True))
|
|
known_paths.append(copy_from_profile(*gen, "initrd", True))
|
|
for path in glob.iglob("@efiSysMountPoint@/loader/entries/nixos*-generation-[1-9]*.conf"):
|
|
try:
|
|
if rex_profile.match(path):
|
|
prof = rex_profile.sub(r"\1", path)
|
|
else:
|
|
prof = "system"
|
|
gen = int(rex_generation.sub(r"\1", path))
|
|
if not (prof, gen) in gens:
|
|
os.unlink(path)
|
|
except ValueError:
|
|
pass
|
|
for path in glob.iglob("@efiSysMountPoint@/efi/nixos/*"):
|
|
if not path in known_paths and not os.path.isdir(path):
|
|
os.unlink(path)
|
|
|
|
def get_profiles():
|
|
if os.path.isdir("/nix/var/nix/profiles/system-profiles/"):
|
|
return [x
|
|
for x in os.listdir("/nix/var/nix/profiles/system-profiles/")
|
|
if not x.endswith("-link")]
|
|
else:
|
|
return []
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description='Update NixOS-related systemd-boot files')
|
|
parser.add_argument('default_config', metavar='DEFAULT-CONFIG', help='The default NixOS config to boot')
|
|
args = parser.parse_args()
|
|
|
|
try:
|
|
with open("/etc/machine-id") as machine_file:
|
|
machine_id = machine_file.readlines()[0]
|
|
except IOError as e:
|
|
if e.errno != errno.ENOENT:
|
|
raise
|
|
# Since systemd version 232 a machine ID is required and it might not
|
|
# be there on newly installed systems, so let's generate one so that
|
|
# bootctl can find it and we can also pass it to write_entry() later.
|
|
cmd = ["@systemd@/bin/systemd-machine-id-setup", "--print"]
|
|
machine_id = subprocess.check_output(cmd).rstrip()
|
|
|
|
if os.getenv("NIXOS_INSTALL_GRUB") == "1":
|
|
warnings.warn("NIXOS_INSTALL_GRUB env var deprecated, use NIXOS_INSTALL_BOOTLOADER", DeprecationWarning)
|
|
os.environ["NIXOS_INSTALL_BOOTLOADER"] = "1"
|
|
|
|
if os.getenv("NIXOS_INSTALL_BOOTLOADER") == "1":
|
|
# bootctl uses fopen() with modes "wxe" and fails if the file exists.
|
|
if os.path.exists("@efiSysMountPoint@/loader/loader.conf"):
|
|
os.unlink("@efiSysMountPoint@/loader/loader.conf")
|
|
|
|
if "@canTouchEfiVariables@" == "1":
|
|
subprocess.check_call(["@systemd@/bin/bootctl", "--path=@efiSysMountPoint@", "install"])
|
|
else:
|
|
subprocess.check_call(["@systemd@/bin/bootctl", "--path=@efiSysMountPoint@", "--no-variables", "install"])
|
|
else:
|
|
# Update bootloader to latest if needed
|
|
systemd_version = subprocess.check_output(["@systemd@/bin/bootctl", "--version"], universal_newlines=True).split()[1]
|
|
sdboot_status = subprocess.check_output(["@systemd@/bin/bootctl", "--path=@efiSysMountPoint@", "status"], universal_newlines=True)
|
|
|
|
# See status_binaries() in systemd bootctl.c for code which generates this
|
|
m = re.search("^\W+File:.*/EFI/(BOOT|systemd)/.*\.efi \(systemd-boot (\d+)\)$",
|
|
sdboot_status, re.IGNORECASE | re.MULTILINE)
|
|
if m is None:
|
|
print("could not find any previously installed systemd-boot")
|
|
else:
|
|
sdboot_version = m.group(2)
|
|
if systemd_version > sdboot_version:
|
|
print("updating systemd-boot from %s to %s" % (sdboot_version, systemd_version))
|
|
subprocess.check_call(["@systemd@/bin/bootctl", "--path=@efiSysMountPoint@", "update"])
|
|
|
|
|
|
mkdir_p("@efiSysMountPoint@/efi/nixos")
|
|
mkdir_p("@efiSysMountPoint@/loader/entries")
|
|
|
|
gens = get_generations()
|
|
for profile in get_profiles():
|
|
gens += get_generations(profile)
|
|
remove_old_entries(gens)
|
|
for gen in gens:
|
|
try:
|
|
write_entry(*gen, machine_id)
|
|
if os.readlink(system_dir(*gen)) == args.default_config:
|
|
write_loader_conf(*gen)
|
|
except OSError as e:
|
|
print("ignoring profile '{}' in the list of boot entries because of the following error:\n{}".format(profile, e), file=sys.stderr)
|
|
|
|
memtest_entry_file = "@efiSysMountPoint@/loader/entries/memtest86.conf"
|
|
if os.path.exists(memtest_entry_file):
|
|
os.unlink(memtest_entry_file)
|
|
shutil.rmtree("@efiSysMountPoint@/efi/memtest86", ignore_errors=True)
|
|
if "@memtest86@" != "":
|
|
mkdir_p("@efiSysMountPoint@/efi/memtest86")
|
|
for path in glob.iglob("@memtest86@/*"):
|
|
if os.path.isdir(path):
|
|
shutil.copytree(path, os.path.join("@efiSysMountPoint@/efi/memtest86", os.path.basename(path)))
|
|
else:
|
|
shutil.copy(path, "@efiSysMountPoint@/efi/memtest86/")
|
|
|
|
memtest_entry_file = "@efiSysMountPoint@/loader/entries/memtest86.conf"
|
|
memtest_entry_file_tmp_path = "%s.tmp" % memtest_entry_file
|
|
with open(memtest_entry_file_tmp_path, 'w') as f:
|
|
f.write(MEMTEST_BOOT_ENTRY)
|
|
os.rename(memtest_entry_file_tmp_path, memtest_entry_file)
|
|
|
|
# Since fat32 provides little recovery facilities after a crash,
|
|
# it can leave the system in an unbootable state, when a crash/outage
|
|
# happens shortly after an update. To decrease the likelihood of this
|
|
# event sync the efi filesystem after each update.
|
|
rc = libc.syncfs(os.open("@efiSysMountPoint@", os.O_RDONLY))
|
|
if rc != 0:
|
|
print("could not sync @efiSysMountPoint@: {}".format(os.strerror(rc)), file=sys.stderr)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|