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#!/usr/bin/python3
# Copyright (c) 2005-2015 Canonical Ltd
#
# AUTHOR:
# Michael Vogt <mvo@ubuntu.com>
#
# This file is part of unattended-upgrades
#
# unattended-upgrades 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.
#
# unattended-upgrades 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 unattended-upgrades; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import atexit
import copy
import datetime
import errno
import email.charset
import fcntl
import fnmatch
import gettext
from gi.repository.Gio import NetworkMonitor
import grp
import io
import locale
import logging
import logging.handlers
import re
import os
import select
import signal
import string
import subprocess
import sys
try:
from typing import AbstractSet, Dict, Iterable, List, Tuple
AbstractSet # pyflakes
Dict # pyflakes
Iterable # pyflakes
List # pyflakes
Tuple # pyflakes
except ImportError:
pass
from datetime import date
from email.message import Message
from gettext import gettext as _
from io import StringIO
from optparse import (
OptionParser,
SUPPRESS_HELP,
)
from subprocess import (
Popen,
PIPE,
)
import apt
import apt_inst
import apt_pkg
# the reboot required flag file used by packages
REBOOT_REQUIRED_FILE = "/var/run/reboot-required"
MAIL_BINARY = "/usr/bin/mail"
SENDMAIL_BINARY = "/usr/sbin/sendmail"
USERS = "/usr/bin/users"
# no py3 lsb_release in debian :/
DISTRO_CODENAME = subprocess.check_output(
["lsb_release", "-c", "-s"], universal_newlines=True).strip() # type: str
DISTRO_DESC = subprocess.check_output(
["lsb_release", "-d", "-s"], universal_newlines=True).strip() # type: str
DISTRO_ID = subprocess.check_output(
["lsb_release", "-i", "-s"], universal_newlines=True).strip() # type: str
# progress information is written here
PROGRESS_LOG = "/var/run/unattended-upgrades.progress"
PID_FILE = "/var/run/unattended-upgrades.pid"
LOCK_FILE = "/var/run/unattended-upgrades.lock"
# set from the sigint signal handler
SIGNAL_STOP_REQUEST = False
class LoggingDateTime:
"""The date/time representation for the dpkg log file timestamps"""
LOG_DATE_TIME_FMT = "%Y-%m-%d %H:%M:%S"
@classmethod
def as_string(cls):
# type: () -> str
"""Return the current date and time as LOG_DATE_TIME_FMT string"""
return datetime.datetime.now().strftime(cls.LOG_DATE_TIME_FMT)
@classmethod
def from_string(cls, logstr):
# type: (str) -> datetime.datetime
"""Take a LOG_DATE_TIME_FMT string and return datetime object"""
return datetime.datetime.strptime(logstr, cls.LOG_DATE_TIME_FMT)
class UnknownMatcherError(ValueError):
pass
class NoAllowedOriginError(ValueError):
pass
class UnattendedUpgradesCache(apt.Cache):
def __init__(self, rootdir, allowed_origins):
# type: (str, List[str]) -> None
self._cached_candidate_pkgnames = set() # type: AbstractSet[str]
self.initial_autoremovable_pkgs = set() # type: AbstractSet[str]
self.allowed_origins = allowed_origins
apt.Cache.__init__(self, rootdir=rootdir)
# generate versioned_kernel_pkgs_regexp for later use
apt_versioned_kernel_pkgs = apt_pkg.config.value_list(
"APT::VersionedKernelPackages")
if apt_versioned_kernel_pkgs:
self.versioned_kernel_pkgs_regexp = re.compile("(" + "|".join(
["^" + p for p in apt_versioned_kernel_pkgs]) + ")")
logging.debug("Using %s regexp to find kernel packages",
self.versioned_kernel_pkgs_regexp.pattern)
running_kernel_version = subprocess.check_output(
["uname", "-r"], universal_newlines=True).rstrip()
self.running_kernel_pkgs_regexp = re.compile("(" + "|".join(
[("^" + p + ".*" + running_kernel_version)
if not p.startswith(".*") else (running_kernel_version + p)
for p in apt_versioned_kernel_pkgs]) + ")")
logging.debug("Using %s regexp to find running kernel packages",
self.running_kernel_pkgs_regexp.pattern)
else:
logging.debug("APT::VersionedKernelPackages is not set")
self.versioned_kernel_pkgs_regexp = None
self.running_kernel_pkgs_regexp = None
def adjust_candidate(self, pkg):
# type: (apt.Package) -> bool
""" Adjust origin and return True if adjustment took place
This is needed when e.g. a package is available in
the security pocket but there is also a package in the
updates pocket with a higher version number
"""
try:
new_cand = ver_in_allowed_origin(pkg, self.allowed_origins)
if new_cand != pkg.candidate:
logging.debug("adjusting candidate version: %s" % new_cand)
pkg.candidate = new_cand
return True
else:
return False
except NoAllowedOriginError:
return False
def call_adjusted(self, function, pkg, **kwargs):
"""Call function, but with adjusting
packages in changes to come from allowed origins
Note that as a side effect more package's candidate can be
adjusted than only the one's in the final changes set.
"""
new_pkgs_to_adjust = [] # List[str]
pkgs_with_no_allowed_origin = []
# adjust candidates in advance if needed
for pkg_name in self._cached_candidate_pkgnames:
self.adjust_candidate(self[pkg_name])
if function == apt.package.Package.mark_upgrade \
and not pkg.is_upgradable:
raise NoAllowedOriginError
function(pkg, **kwargs)
changes = self.get_changes()
for marked_pkg in changes:
if not is_allowed_origin(marked_pkg.candidate,
self.allowed_origins):
try:
ver_in_allowed_origin(marked_pkg,
self.allowed_origins)
# important! this avoids downgrades below
if pkg.is_installed and not pkg.is_upgradable:
continue
new_pkgs_to_adjust.append(marked_pkg)
except NoAllowedOriginError:
pkgs_with_no_allowed_origin.append(marked_pkg)
if new_pkgs_to_adjust:
for pkg_to_adjust in new_pkgs_to_adjust:
self.adjust_candidate(pkg_to_adjust)
self._cached_candidate_pkgnames.add(pkg_to_adjust.name)
self.call_adjusted(function, pkg, **kwargs)
else:
if pkgs_with_no_allowed_origin:
raise NoAllowedOriginError
def mark_upgrade_adjusted(self, pkg, **kwargs):
self.call_adjusted(apt.package.Package.mark_upgrade, pkg, **kwargs)
def mark_install_adjusted(self, pkg, **kwargs):
self.call_adjusted(apt.package.Package.mark_install, pkg, **kwargs)
class LogInstallProgress(apt.progress.base.InstallProgress):
""" Install progress that writes to self.progress_log
(/var/run/unattended-upgrades.progress by default)
"""
def __init__(self, logfile_dpkg, verbose=False,
progress_log="var/run/unattended-upgrades.progress"):
# type: (str, bool, str) -> None
apt.progress.base.InstallProgress.__init__(self)
self.logfile_dpkg = logfile_dpkg
self.progress_log = os.path.join(apt_pkg.config.find_dir("Dir"),
progress_log)
self.verbose = verbose
self.output_logfd = None # type: int
def status_change(self, pkg, percent, status):
# type: (str, float, str) -> None
with open(self.progress_log, "w") as f:
f.write(_("Progress: %s %% (%s)") % (percent, pkg))
def _fixup_fds(self):
# () -> None
required_fds = [0, 1, 2, # stdin, stdout, stderr
self.writefd,
self.write_stream.fileno(),
self.statusfd,
self.status_stream.fileno()
]
# ensure that our required fds close on exec
for fd in required_fds[3:]:
old_flags = fcntl.fcntl(fd, fcntl.F_GETFD)
fcntl.fcntl(fd, fcntl.F_SETFD, old_flags | fcntl.FD_CLOEXEC)
# close all fds
proc_fd = "/proc/self/fd"
if os.path.exists(proc_fd):
error_count = 0
for fdname in os.listdir(proc_fd):
try:
fd = int(fdname)
except Exception as e:
print("ERROR: can not get fd for %s" % fdname)
if fd in required_fds:
continue
try:
os.close(fd)
# print("closed: ", fd)
except OSError as e:
# there will be one fd that can not be closed
# as its the fd from pythons internal diropen()
# so its ok to ignore one close error
error_count += 1
if error_count > 1:
print("ERROR: os.close(%s): %s" % (fd, e))
def _redirect_stdin(self):
# type: () -> None
REDIRECT_INPUT = os.devnull
fd = os.open(REDIRECT_INPUT, os.O_RDWR)
os.dup2(fd, 0)
def _redirect_output(self):
# type: () -> None
# do not create log in dry-run mode, just output to stdout/stderr
if not apt_pkg.config.find_b("Debug::pkgDPkgPM", False):
logfd = self._get_logfile_dpkg_fd()
os.dup2(logfd, 1)
os.dup2(logfd, 2)
def _get_logfile_dpkg_fd(self):
# type: () -> int
logfd = os.open(
self.logfile_dpkg, os.O_RDWR | os.O_APPEND | os.O_CREAT, 0o640)
try:
adm_gid = grp.getgrnam("adm").gr_gid
os.fchown(logfd, 0, adm_gid)
except (KeyError, OSError):
pass
return logfd
def update_interface(self):
# type: () -> None
# call super class first
apt.progress.base.InstallProgress.update_interface(self)
self._do_verbose_output_if_needed()
def _do_verbose_output_if_needed(self):
# type: () -> None
# if we are in debug mode, nothing to be more verbose about
if apt_pkg.config.find_b("Debug::pkgDPkgPM", False):
return
# handle verbose
if self.verbose:
if self.output_logfd is None:
self.output_logfd = os.open(self.logfile_dpkg, os.O_RDONLY)
os.lseek(self.output_logfd, 0, os.SEEK_END)
try:
select.select([self.output_logfd], [], [], 0)
# FIXME: this should be OSError, but in py2.7 it is still
# select.error
except select.error as e:
if e.errno != errno.EINTR: # type: ignore
logging.exception("select failed")
# output to stdout in verbose mode only
os.write(1, os.read(self.output_logfd, 1024))
def _log_in_dpkg_log(self, msg):
# type: (str) -> None
logfd = self._get_logfile_dpkg_fd()
os.write(logfd, msg.encode("utf-8"))
os.close(logfd)
def finish_update(self):
# type: () -> None
self._log_in_dpkg_log("Log ended: %s\n\n"
% LoggingDateTime.as_string())
def fork(self):
# type: () -> int
self._log_in_dpkg_log("Log started: %s\n"
% LoggingDateTime.as_string())
pid = os.fork()
if pid == 0:
self._fixup_fds()
self._redirect_stdin()
self._redirect_output()
return pid
class Unlocked:
"""
Context manager for unlocking the apt lock while cache.commit() is run
"""
def __enter__(self):
# type: () -> None
try:
apt_pkg.pkgsystem_unlock()
except Exception:
pass
def __exit__(self, exc_type, exc_value, exc_tb):
# type: (object, object, object) -> None
apt_pkg.pkgsystem_lock()
def is_dpkg_journal_dirty():
# type: () -> bool
"""
Return True if the dpkg journal is dirty
(similar to debSystem::CheckUpdates)
"""
d = os.path.join(
os.path.dirname(apt_pkg.config.find_file("Dir::State::status")),
"updates")
for f in os.listdir(d):
if re.match("[0-9]+", f):
return True
return False
def signal_handler(signal, frame):
# type: (int, object) -> None
logging.warning("SIGTERM received, will stop")
global SIGNAL_STOP_REQUEST
SIGNAL_STOP_REQUEST = True
def should_stop():
# type: () -> bool
"""
Return True if u-u needs to stop due to signal received or due to the
system started to run on battery.
"""
if SIGNAL_STOP_REQUEST:
logging.warning("SIGNAL received, stopping")
return True
if apt_pkg.config.find_b("Unattended-Upgrade::OnlyOnACPower", True) and \
subprocess.call("on_ac_power") == 1:
logging.warning("System is on battery power, stopping")
return True
if apt_pkg.config.find_b(
"Unattended-Upgrade::Skip-Updates-On-Metered-Connections", True):
if NetworkMonitor.get_network_metered(NetworkMonitor.get_default()):
logging.warning(_("System is on metered connection, stopping"))
return True
return False
def substitute(line):
# type: (str) -> str
""" substitude known mappings and return a new string
Currently supported ${distro-release}
"""
mapping = {"distro_codename": get_distro_codename(),
"distro_id": get_distro_id()}
return string.Template(line).substitute(mapping)
def get_distro_codename():
# type: () -> str
return DISTRO_CODENAME
def get_distro_id():
# type: () -> str
return DISTRO_ID
def get_allowed_origins_legacy():
# type: () -> List[str]
""" legacy support for old Allowed-Origins var """
allowed_origins = [] # type: List[str]
key = "Unattended-Upgrade::Allowed-Origins"
try:
for s in apt_pkg.config.value_list(key):
# if there is a ":" use that as seperator, else use spaces
if re.findall(r'(?<!\\):', s):
(distro_id, distro_codename) = re.split(r'(?<!\\):', s)
else:
(distro_id, distro_codename) = s.split()
# unescape "\:" back to ":"
distro_id = re.sub(r'\\:', ':', distro_id)
# escape "," (see LP: #824856) - can this be simpler?
distro_id = re.sub(r'([^\\]),', r'\1\\,', distro_id)
distro_codename = re.sub(r'([^\\]),', r'\1\\,', distro_codename)
# convert to new format
allowed_origins.append("o=%s,a=%s" % (substitute(distro_id),
substitute(distro_codename)))
except ValueError:
logging.error(_("Unable to parse %s." % key))
raise
return allowed_origins
def get_allowed_origins():
# type: () -> List[str]
""" return a list of allowed origins from apt.conf
This will take substitutions (like distro_id) into account.
"""
allowed_origins = get_allowed_origins_legacy()
key = "Unattended-Upgrade::Origins-Pattern"
try:
for s in apt_pkg.config.value_list(key):
allowed_origins.append(substitute(s))
except ValueError:
logging.error(_("Unable to parse %s." % key))
raise
return allowed_origins
def match_whitelist_string(whitelist, origin):
# type: (str, apt.package.Origin) -> bool
"""
take a whitelist string in the form "origin=Debian,label=Debian-Security"
and match against the given python-apt origin. A empty whitelist string
never matches anything.
"""
whitelist = whitelist.strip()
if whitelist == "":
logging.warning("empty match string matches nothing")
return False
res = True
# make "\," the html quote equivalent
whitelist = whitelist.replace("\,", "%2C")
for token in whitelist.split(","):
# strip and unquote the "," back
(what, value) = [s.strip().replace("%2C", ",")
for s in token.split("=")]
# logging.debug("matching %s=%s against %s" % (
# what, value, origin))
# support substitution here as well
value = substitute(value)
# first char is apt-cache policy output, send is the name
# in the Release file
if what in ("o", "origin"):
match = fnmatch.fnmatch(origin.origin, value)
elif what in ("l", "label"):
match = fnmatch.fnmatch(origin.label, value)
elif what in ("a", "suite", "archive"):
match = fnmatch.fnmatch(origin.archive, value)
elif what in ("c", "component"):
match = fnmatch.fnmatch(origin.component, value)
elif what in ("site",):
match = fnmatch.fnmatch(origin.site, value)
elif what in ("n", "codename",):
match = fnmatch.fnmatch(origin.codename, value)
else:
raise UnknownMatcherError(
"Unknown whitelist entry for matcher %s (token %s)" % (
what, token))
# update res
res = res and match
# logging.debug("matching %s=%s against %s" % (
# what, value, origin))
return res
def cache_commit(cache, # type: apt.Cache
logfile_dpkg, # type: str
verbose, # type: bool
iprogress=None, # type: apt.progress.base.InstallProgress
):
# type: (...) -> Tuple[bool, Exception]
"""Commit the changes from the given cache to the system"""
# set debconf to NON_INTERACTIVE, redirect output
os.putenv("DEBIAN_FRONTEND", "noninteractive")
# only act if there is anything to do (important to avoid writing
# empty log stanzas)
if len(cache.get_changes()) == 0:
return True, None
error = None
res = False
if iprogress is None:
iprogress = LogInstallProgress(logfile_dpkg, verbose)
try:
with Unlocked():
res = cache.commit(install_progress=iprogress)
cache.open()
except Exception as e:
error = e
if verbose:
logging.exception("Exception happened during upgrade.")
res = False
cache.clear()
return res, error
def upgrade_normal(cache, logfile_dpkg, verbose):
# type: (apt.Cache, str, bool) -> bool
res, error = cache_commit(cache, logfile_dpkg, verbose)
if res:
logging.info(_("All upgrades installed"))
else:
logging.error(_("Installing the upgrades failed!"))
logging.error(_("error message: %s"), error)
logging.error(_("dpkg returned a error! See %s for details"),
logfile_dpkg)
return res
def use_minimal_steps(options):
# type: (Options) -> bool
return (options.minimal_upgrade_steps or
# COMPAT with the mispelling
(apt_pkg.config.find_b("Unattended-Upgrades::MinimalSteps",
True) and
apt_pkg.config.find_b("Unattended-Upgrade::MinimalSteps",
True)))
def upgrade_in_minimal_steps(cache, # type: apt.Cache
pkgs_to_upgrade, # type: List[str]
blacklist, # type: List[str]
whitelist, # type: List[str]
logfile_dpkg="", # type: str
verbose=False, # type: bool
):
# type: (...) -> bool
install_log = LogInstallProgress(logfile_dpkg, verbose)
# double check any changes we do
allowed_origins = get_allowed_origins()
# pre-calculate set sizes to process sets which are expected to be smaller
# earlier
upgrade_set_sizes = {}
# calculate upgrade sets
for pkgname in pkgs_to_upgrade:
cache.clear()
pkg = cache[pkgname]
if pkg.is_upgradable:
pkg.mark_upgrade()
elif not pkg.is_installed:
pkg.mark_install()
else:
continue
upgrade_set_sizes[pkgname] = len(cache.get_changes())
cache.clear()
# to upgrade contains the package names
to_upgrade = set(pkgs_to_upgrade)
for pkgname in sorted(upgrade_set_sizes, key=upgrade_set_sizes.get):
# upgrade packages and dependencies in increasing expected size of
# package sets to upgrade/install together
if pkgname not in to_upgrade:
# pkg is upgraded in a previous set
continue
if should_stop():
return False
pkg = cache[pkgname]
if pkg.is_upgradable:
cache.mark_upgrade_adjusted(pkg,
from_user=not pkg.is_auto_installed)
elif not pkg.is_installed:
cache.mark_install_adjusted(pkg, from_user=False)
else:
continue
# double check that we are not running into side effects like
# what could have been caused LP: #1020680
if not check_changes_for_sanity(cache, allowed_origins, blacklist,
whitelist):
logging.info("While building minimal partition: "
"cache has not allowed changes")
cache.clear()
continue
changes = [p.name for p in cache.get_changes()]
if not changes:
continue
# write progress log information
if len(pkgs_to_upgrade) > 0:
percent = ((len(pkgs_to_upgrade) - len(to_upgrade)) /
float(len(pkgs_to_upgrade)) * 100.0)
else:
percent = 100.0
install_log.status_change(pkg=",".join(changes),
percent=percent,
status="")
# apply changes
logging.debug("applying set %s" % changes)
res, error = cache_commit(cache, logfile_dpkg, verbose, install_log)
if error:
if verbose:
logging.exception("Exception happened during upgrade.")
logging.error(_("Installing the upgrades failed!"))
logging.error(_("error message: %s"), error)
logging.error(_("dpkg returned a error! See %s for details"),
logfile_dpkg)
return False
to_upgrade = to_upgrade - set(changes)
logging.debug("left to upgrade %s" % to_upgrade)
if len(to_upgrade) == 0:
logging.info(_("All upgrades installed"))
break
return True
def is_allowed_origin(ver, allowed_origins):
# type: (apt.package.Version, List[str]) -> bool
if not ver:
return False
for origin in ver.origins:
for allowed in allowed_origins:
if match_whitelist_string(allowed, origin):
return True
return False
def ver_in_allowed_origin(pkg, allowed_origins):
# type: (apt.Package, List[str]) -> apt.package.Version
for ver in pkg.versions:
# ignore versions that the user marked with priority < 100
# (and ensure we have a python-apt that supports this)
try:
if ver.policy_priority < 100:
logging.debug("ignoring ver %s with priority < 0" % ver)
continue
except AttributeError:
pass
if is_allowed_origin(ver, allowed_origins):
# leave as soon as we have the highest new candidate
return ver
raise NoAllowedOriginError()
def is_pkgname_in_blacklist(pkgname, blacklist):
# type: (str, List[str]) -> bool
for blacklist_regexp in blacklist:
if re.match(blacklist_regexp, pkgname):
logging.debug("skipping blacklisted package %s" % pkgname)
return True
return False
def is_pkgname_in_whitelist(pkgname, whitelist):
# type: (str, List[str]) -> bool
# a empty whitelist means the user does not want to use this feature
if not whitelist:
return True
for whitelist_regexp in whitelist:
if re.match(whitelist_regexp, pkgname):
logging.debug("only upgrading the following package %s" %
pkgname)
return True
return False
def is_pkg_change_allowed(pkg, blacklist, whitelist):
# type: (apt.Package, List[str], List[str]) -> bool
if is_pkgname_in_blacklist(pkg.name, blacklist):
logging.debug("pkg %s package has been blacklisted" % pkg.name)
return False
# a strict whitelist will not allow any changes not in the
# whitelist, most people will want the relaxed whitelist
# that whitelists a package but pulls in the package
# dependencies
strict_whitelist = apt_pkg.config.find_b(
"Unattended-Upgrade::Package-Whitelist-Strict", False)
if strict_whitelist and \
not is_pkgname_in_whitelist(pkg.name, whitelist):
logging.debug("pkg %s package is not whitelisted" %
pkg.name)
return False
if pkg._pkg.selected_state == apt_pkg.SELSTATE_HOLD:
logging.debug("pkg %s is on hold" % pkg.name)
return False
return True
def check_changes_for_sanity(cache, allowed_origins, blacklist, whitelist,
desired_pkg=None):
# type: (apt.Cache, List[str], List[str], List[str], apt.Package) -> bool
if cache._depcache.broken_count != 0:
return False
# If there are no packages to be installed they were kept back
if cache.install_count == 0:
return False
for pkg in cache.get_changes():
if pkg.marked_delete:
logging.debug("pkg %s now marked delete" % pkg.name)
return False
if pkg.marked_install or pkg.marked_upgrade:
# apt will never fallback from a trusted to a untrusted
# origin so its good enough if we have a single trusted one
if not any([o.trusted for o in pkg.candidate.origins]):
logging.debug("pkg %s is untrusted" % pkg.name)
return False
if not is_allowed_origin(pkg.candidate, allowed_origins):
logging.debug("pkg %s not in allowed origin" % pkg.name)
return False
if not is_pkg_change_allowed(pkg, blacklist, whitelist):
return False
# check if the package is unsafe to upgrade unattended
ignore_require_restart = apt_pkg.config.find_b(
"Unattended-Upgrade::IgnoreAppsRequireRestart", False)
upgrade_requires = pkg.candidate.record.get("Upgrade-Requires")
if (pkg.marked_upgrade and ignore_require_restart is False and
upgrade_requires == "app-restart"):
logging.debug("pkg %s requires app-restart, not safe to "
"upgrade unattended")
return False
# check that the package we want to upgrade is in the change set
if desired_pkg and desired_pkg not in cache.get_changes():
return False
return True
def pkgname_from_deb(debfile):
# type: (str) -> str
# FIXME: add error checking here
try:
control = apt_inst.DebFile(debfile).control.extractdata("control")
sections = apt_pkg.TagSection(control)
return sections["Package"]
except (IOError, SystemError) as e:
logging.error("failed to read deb file %s (%s)" % (debfile, e))
# dumb fallback
return debfile.split("_")[0]
def get_md5sum_for_file_in_deb(deb_file, conf_file):
# type: (str, str) -> str
dpkg_cmd = ["dpkg-deb", "--fsys-tarfile", deb_file]
tar_cmd = ["tar", "-x", "-O", "-f", "-", "." + conf_file]
md5_cmd = ["md5sum"]
dpkg_p = Popen(dpkg_cmd, stdout=PIPE)
tar_p = Popen(tar_cmd, stdin=dpkg_p.stdout, stdout=PIPE,
universal_newlines=True)
md5_p = Popen(md5_cmd, stdin=tar_p.stdout, stdout=PIPE,
universal_newlines=True)
pkg_md5sum = md5_p.communicate()[0].split()[0]
for p in [dpkg_p, tar_p, md5_p]:
p.stdout.close()
p.wait()
return pkg_md5sum
# prefix is *only* needed for the build-in tests
def conffile_prompt(destFile, prefix=""):
# type: (str, str) -> bool
logging.debug("check_conffile_prompt(%s)" % destFile)
pkgname = pkgname_from_deb(destFile)
# get the conffiles for the /var/lib/dpkg/status file
status_file = apt_pkg.config.find("Dir::State::status")
with open(status_file, "r") as f:
tagfile = apt_pkg.TagFile(f)
conffiles = ""
for section in tagfile:
if section.get("Package") == pkgname:
logging.debug("found pkg: %s" % pkgname)
if "Conffiles" in section:
conffiles = section.get("Conffiles")
break
# get conffile value from pkg, its ok if the new version
# does not have conffiles anymore
pkg_conffiles = ""
try:
deb = apt_inst.DebFile(destFile)
pkg_conffiles = deb.control.extractdata("conffiles").strip().decode(
"utf-8")
except SystemError as e:
print(_("Apt returned an error, exiting"))
print(_("error message: %s") % e)
logging.error(_("Apt returned an error, exiting"))
logging.error(_("error message: %s"), e)
sys.exit(1)
except LookupError as e:
logging.debug("No conffiles in deb %s (%s)" % (destFile, e))
# Conffiles:
# /etc/bash_completion.d/m-a c7780fab6b14d75ca54e11e992a6c11c
dpkg_status_conffiles = {}
for line in conffiles.splitlines():
# ignore empty lines
line = line.strip()
if not line:
continue
# show what we do
logging.debug("conffile line: %s", line)
li = line.split()
conf_file = li[0]
md5 = li[1]
if len(li) > 2:
obs = li[2]
else:
obs = None
# ignore if conffile is obsolete
if obs == "obsolete":
continue
# ignore state "newconffile" until its clearer if there
# might be a dpkg prompt (LP: #936870)
if md5 == "newconffile":
continue
if not pkg_conffiles or conf_file not in pkg_conffiles.split("\n"):
logging.debug("%s not in package conffiles %s" % (
conf_file, pkg_conffiles))
continue
# record for later
dpkg_status_conffiles[conf_file] = md5
# the package replaces a directory wih a configuration file
#
# if the package changed this way it is safe to assume that
# the transition happens without showing a prompt but if the admin
# created the directory the admin will need to resolve it after
# being notified about the unexpected prompt
if os.path.isdir(prefix + conf_file):
continue
# test against the installed file, if the local file got deleted
# by the admin thats ok but it may still trigger a conffile prompt
# (see debian #788049)
current_md5 = ""
if os.path.exists(prefix + conf_file):
with open(prefix + conf_file, 'rb') as fb:
current_md5 = apt_pkg.md5sum(fb)
logging.debug("current md5: %s" % current_md5)
# hashes are the same, no conffile prompt
if current_md5 == md5:
continue
# calculate md5sum from the deb (may take a bit)
pkg_md5sum = get_md5sum_for_file_in_deb(destFile, conf_file)
logging.debug("pkg_md5sum: %s" % pkg_md5sum)
# the md5sum in the deb is unchanged, this will not
# trigger a conffile prompt
if pkg_md5sum == md5:
continue
# if we made it to this point:
# current_md5 != pkg_md5sum != md5
# and that will trigger a conffile prompt, we can
# stop processing at this point and just return True
return True
# now check if there are conffiles in the pkg that where not there
# in the previous version in the dpkg status file
if pkg_conffiles:
for conf_file in pkg_conffiles.split("\n"):
if (conf_file not in dpkg_status_conffiles and
os.path.exists(prefix + conf_file)):
logging.debug("found conffile %s in new pkg but on dpkg "
"status" % conf_file)
pkg_md5sum = get_md5sum_for_file_in_deb(destFile, conf_file)
with open(prefix + conf_file, 'rb') as fp:
if pkg_md5sum != apt_pkg.md5sum(fp):
return True
return False
def dpkg_conffile_prompt():
# type: () -> bool
if "DPkg::Options" not in apt_pkg.config:
return True
options = apt_pkg.config.value_list("DPkg::Options")
for option in options:
option = option.strip()
if option in ["--force-confold", "--force-confnew"]:
return False
return True
def rewind_cache(cache, pkgs_to_upgrade):
# type: (apt.Cache, List[apt.Package]) -> None
""" set the cache back to the state with packages_to_upgrade """
cache.clear()
for pkg2 in pkgs_to_upgrade:
pkg2.mark_install(from_user=not pkg2.is_auto_installed)
if cache.broken_count > 0:
raise AssertionError("rewind_cache created a broken cache")
def host():
# type: () -> str
return os.uname()[1]
# *sigh* textwrap is nice, but it breaks "linux-image" into two
# seperate lines
def wrap(t, width=70, subsequent_indent=""):
# type: (str, int, str) -> str
out = ""
for s in t.split():
if (len(out) - out.rfind("\n")) + len(s) > width:
out += "\n" + subsequent_indent
out += s + " "
return out
def setup_apt_listchanges(conf="/etc/apt/listchanges.conf"):
# type: (str) -> None
""" deal with apt-listchanges """
# apt-listchanges will always send a mail if there is a mail address
# set in the config regardless of the frontend used, so set it to
# mail if we have a sendmail and to none if not (as it appears to
# not check if sendmail is there or not), debian bug #579733
if os.path.exists(SENDMAIL_BINARY):
os.environ["APT_LISTCHANGES_FRONTEND"] = "mail"
else:
os.environ["APT_LISTCHANGES_FRONTEND"] = "none"
def _send_mail_using_mailx(from_address, to_address, subject, body):
# type: (str, str, str, str) -> int
# ensure that the body is a byte stream and that we do not
# break on encoding errors (the default error mode is "strict")
encoded_body = body.encode(
locale.getpreferredencoding(False), errors="replace")
# we use a binary pipe to stdin to ensure we do not break on
# unicode encoding errors (e.g. because the user is running a
# ascii only system like the buildds)
mail = subprocess.Popen(
[MAIL_BINARY, "-r", from_address, "-s", subject, to_address],
stdin=subprocess.PIPE, universal_newlines=False)
mail.stdin.write(encoded_body)
mail.stdin.close()
ret = mail.wait()
return ret
def _send_mail_using_sendmail(from_address, to_address, subject, body):
# type: (str, str, str, str) -> int
# format as a proper mail
msg = Message()
msg['Subject'] = subject
msg['From'] = from_address
msg['To'] = to_address
msg['Auto-Submitted'] = "auto-generated"
# order is important here, Message() first, then Charset()
# then msg.set_charset()
charset = email.charset.Charset("utf-8")
charset.body_encoding = email.charset.QP # type: ignore
msg.set_payload(body, charset)
# and send it away
sendmail = subprocess.Popen(
[SENDMAIL_BINARY, "-oi", "-t"],
stdin=subprocess.PIPE, universal_newlines=True)
sendmail.stdin.write(msg.as_string())
sendmail.stdin.close()
ret = sendmail.wait()
return ret
def send_summary_mail(pkgs, res, pkgs_kept_back, pkgs_removed,
pkgs_kept_installed, mem_log, dpkg_log_content):
# type: (str, bool, List[str], List[str], List[str], StringIO, str) -> None
""" send mail (if configured in Unattended-Upgrade::Mail) """
to_email = apt_pkg.config.find("Unattended-Upgrade::Mail", "")
if not to_email:
return
if not os.path.exists(MAIL_BINARY) and not os.path.exists(SENDMAIL_BINARY):
logging.error(_("No /usr/bin/mail or /usr/sbin/sendmail,"
"can not send mail. "
"You probably want to install the mailx package."))
return
# if the operation was successful and the user has requested to get
# mails on on errors, just exit here
if (res and apt_pkg.config.find_b(
"Unattended-Upgrade::MailOnlyOnError", False)):
return
# Check if reboot-required flag is present
reboot_flag_str = _(
"[reboot required]") if os.path.isfile(REBOOT_REQUIRED_FILE) else ""
# Check if packages are kept on hold
hold_flag_str = _("[package on hold]") if (pkgs_kept_back or
pkgs_kept_installed) else ""
logging.debug("Sending mail to %s" % to_email)
subject = _(
"{hold_flag}{reboot_flag} unattended-upgrades result for "
"{machine}: {result}").format(
hold_flag=hold_flag_str, reboot_flag=reboot_flag_str,
machine=host(), result=res).strip()
body = _("Unattended upgrade returned: %s\n\n") % res
if os.path.isfile(REBOOT_REQUIRED_FILE):
body += _(
"Warning: A reboot is required to complete this upgrade.\n\n")
if res:
body += _("Packages that were upgraded:\n")
else:
body += _("Packages that attempted to upgrade:\n")
body += " " + wrap(pkgs, 70, " ")
body += "\n"
if pkgs_kept_back:
body += _("Packages with upgradable origin but kept back:\n")
body += " " + wrap(" ".join(pkgs_kept_back), 70, " ")
body += "\n"
body += "\n"
if pkgs_removed:
body += _("Packages that were auto-removed:\n")
body += " " + wrap(" ".join(pkgs_removed), 70, " ")
body += "\n"
body += "\n"
if pkgs_kept_installed:
body += _("Packages that were kept from being auto-removed:\n")
body += " " + wrap(" ".join(pkgs_kept_installed), 70, " ")
body += "\n"
body += "\n"
if dpkg_log_content:
body += _("Package installation log:") + "\n"
body += dpkg_log_content
body += "\n\n"
body += _("Unattended-upgrades log:\n")
body += mem_log.getvalue()
from_email = apt_pkg.config.find("Unattended-Upgrade::Sender", "root")
if os.path.exists(SENDMAIL_BINARY):
ret = _send_mail_using_sendmail(from_email, to_email, subject, body)
elif os.path.exists(MAIL_BINARY):
ret = _send_mail_using_mailx(from_email, to_email, subject, body)
else:
raise AssertionError(
"This should never be reached, if we are here we either "
"have sendmail or mailx. Please report this as a bug.")
logging.debug("mail returned: %s", ret)
def do_install(cache, # type: apt.Cache
pkgs_to_upgrade, # type: List[apt.Package]
blacklisted_pkgs, # type: List[str]
whitelisted_pkgs, # type: List[str]
options, # type: Options
logfile_dpkg, # type: str
):
# type: (...) -> bool
# set debconf to NON_INTERACTIVE, redirect output
os.putenv("DEBIAN_FRONTEND", "noninteractive")
setup_apt_listchanges()
logging.info(_("Writing dpkg log to %s"), logfile_dpkg)
marked_delete = [pkg for pkg in cache.get_changes() if pkg.marked_delete]
if marked_delete:
raise AssertionError(
"Internal error. The following packages are marked for "
"removal:%s" % "".join([pkg.name for pkg in marked_delete]))
pkg_install_success = False
try:
if use_minimal_steps(options):
# try upgrade all "pkgs" in minimal steps
pkg_install_success = upgrade_in_minimal_steps(
cache, [pkg.name for pkg in pkgs_to_upgrade],
blacklisted_pkgs, whitelisted_pkgs, logfile_dpkg,
options.verbose or options.debug)
else:
pkg_install_success = upgrade_normal(
cache, logfile_dpkg, options.verbose or options.debug)
except Exception as e:
# print unhandled exceptions here this way, while stderr is redirected
os.write(2, ("Exception: %s\n" % e).encode('utf-8'))
pkg_install_success = False
return pkg_install_success
def _setup_alternative_rootdir(rootdir):
# type: (str) -> None
# clear system unattended-upgrade stuff
apt_pkg.config.clear("Unattended-Upgrade")
# read rootdir (taken from apt.Cache, but we need to run it
# here before the cache gets initialized
if os.path.exists(rootdir + "/etc/apt/apt.conf"):
apt_pkg.read_config_file(apt_pkg.config,
rootdir + "/etc/apt/apt.conf")
if os.path.isdir(rootdir + "/etc/apt/apt.conf.d"):
apt_pkg.read_config_dir(apt_pkg.config,
rootdir + "/etc/apt/apt.conf.d")
logdir = os.path.join(rootdir, "var", "log", "unattended-upgrades")
if not os.path.exists(logdir):
os.makedirs(logdir)
apt.apt_pkg.config.set("Unattended-Upgrade::LogDir", logdir)
def _get_logdir():
# type: () -> str
logdir = apt_pkg.config.find_dir(
"Unattended-Upgrade::LogDir",
# COMPAT only
apt_pkg.config.find_dir("APT::UnattendedUpgrades::LogDir",
"/var/log/unattended-upgrades/"))
return logdir
def _setup_logging(options):
# type: (Options) -> StringIO
# ensure this is run only once
if len(logging.root.handlers) > 0:
return None
# init the logging
logdir = _get_logdir()
logfile = os.path.join(
logdir,
apt_pkg.config.find(
"Unattended-Upgrade::LogFile",
# COMPAT only
apt_pkg.config.find("APT::UnattendedUpgrades::LogFile",
"unattended-upgrades.log")))
if not options.dry_run and not os.path.exists(logdir):
os.makedirs(logdir)
logging.basicConfig(level=logging.INFO,
format='%(asctime)s %(levelname)s %(message)s',
filename=logfile)
# additional logging
logger = logging.getLogger()
mem_log = StringIO()
if options.apt_debug:
apt_pkg.config.set("Debug::pkgProblemResolver", "1")
apt_pkg.config.set("Debug::pkgDepCache::AutoInstall", "1")
if options.debug:
logger.setLevel(logging.DEBUG)
stdout_handler = logging.StreamHandler(sys.stdout)
logger.addHandler(stdout_handler)
elif options.verbose:
logger.setLevel(logging.INFO)
stdout_handler = logging.StreamHandler(sys.stdout)
logger.addHandler(stdout_handler)
if apt_pkg.config.find("Unattended-Upgrade::Mail", ""):
mem_log_handler = logging.StreamHandler(mem_log)
logger.addHandler(mem_log_handler)
# Configure syslog if necessary
syslogEnable = apt_pkg.config.find_b("Unattended-Upgrade::SyslogEnable",
False)
if syslogEnable:
syslogFacility = apt_pkg.config.find(
"Unattended-Upgrade::SyslogFacility",
"daemon")
syslogHandler = logging.handlers.SysLogHandler(
address='/dev/log',
facility=syslogFacility)
syslogHandler.setFormatter(
logging.Formatter("unattended-upgrade: %(message)s"))
known = syslogHandler.facility_names.keys() # type: ignore
if syslogFacility.lower() in known:
logger.addHandler(syslogHandler)
logging.info("Enabled logging to syslog via %s facility "
% syslogFacility)
else:
logging.warning("Syslog facility %s was not found"
% syslogFacility)
return mem_log
def get_blacklisted_pkgs():
# type: () -> List[str]
return apt_pkg.config.value_list("Unattended-Upgrade::Package-Blacklist")
def get_whitelisted_pkgs():
# type: () -> List[str]
return apt_pkg.config.value_list("Unattended-Upgrade::Package-Whitelist")
def logged_in_users():
# type: () -> AbstractSet[str]
"""Return a list of logged in users"""
# the "users" command always returns a single line with:
# "user1, user1, user2"
users = subprocess.check_output(
USERS, universal_newlines=True).rstrip('\n')
return set(users.split())
def reboot_if_requested_and_needed():
# type: () -> None
"""auto-reboot (if required and the config for this is set)"""
if not os.path.exists(REBOOT_REQUIRED_FILE):
return
if not apt_pkg.config.find_b(
"Unattended-Upgrade::Automatic-Reboot", False):
return
# see if we need to check for logged in users
if not apt_pkg.config.find_b(
"Unattended-Upgrade::Automatic-Reboot-WithUsers", True):
users = logged_in_users()
if users:
msg = gettext.ngettext(
"Found %s, but not rebooting because %s is logged in." % (
REBOOT_REQUIRED_FILE, users),
"Found %s, but not rebooting because %s are logged in." % (
REBOOT_REQUIRED_FILE, users),
len(users))
logging.warning(msg)
return
# reboot at the specified time
when = apt_pkg.config.find(
"Unattended-Upgrade::Automatic-Reboot-Time", "now")
logging.warning("Found %s, rebooting" % REBOOT_REQUIRED_FILE)
subprocess.call(["/sbin/shutdown", "-r", when])
def write_stamp_file():
# type: () -> None
statedir = os.path.join(apt_pkg.config.find_dir("Dir::State"), "periodic")
if not os.path.exists(statedir):
os.makedirs(statedir)
with open(os.path.join(statedir, "unattended-upgrades-stamp"), "w"):
pass
def try_to_upgrade(pkg, # type: apt.Package
pkgs_to_upgrade, # type: List[apt.Package]
pkgs_kept_back, # type: List[str]
cache, # type: apt.Cache
allowed_origins, # type: List[str]
blacklisted_pkgs, # type: List[str]
whitelisted_pkgs, # type: List[str]
):
# type: (...) -> None
try:
try:
# try to adjust pkg itself first, if that throws an exception it
# can't be upgraded on its own
cache.adjust_candidate(pkg)
if not pkg.is_upgradable:
return
except NoAllowedOriginError:
return
cache._cached_candidate_pkgnames.add(pkg.name)
cache.mark_upgrade_adjusted(pkg, from_user=not pkg.is_auto_installed)
if check_changes_for_sanity(cache, allowed_origins,
blacklisted_pkgs, whitelisted_pkgs,
pkg):
# add to packages to upgrade
pkgs_to_upgrade.append(pkg)
# re-eval pkgs_kept_back as the resolver may fail to
# directly upgrade a pkg, but that may work during
# a subsequent operation, see debian bug #639840
for pkgname in pkgs_kept_back:
if (cache[pkgname].marked_install or
cache[pkgname].marked_upgrade):
pkgs_kept_back.remove(pkgname)
pkgs_to_upgrade.append(cache[pkgname])
else:
logging.debug("sanity check failed")
rewind_cache(cache, pkgs_to_upgrade)
pkgs_kept_back.append(pkg.name)
except (SystemError, NoAllowedOriginError) as e:
# can't upgrade
logging.warning(
_("package %s upgradable but fails to "
"be marked for upgrade (%s)"), pkg.name, e)
rewind_cache(cache, pkgs_to_upgrade)
pkgs_kept_back.append(pkg.name)
def calculate_upgradable_pkgs(cache, # type: apt.Cache
options, # type: Options
allowed_origins, # type: List[str]
blacklisted_pkgs, # type: List[str]
whitelisted_pkgs, # type: List[str]
):
# type: (...) -> Tuple[List[apt.Package], List[str]]
pkgs_to_upgrade = [] # type: List[apt.Package]
pkgs_kept_back = [] # type: List[str]
# now do the actual upgrade
for pkg in cache:
# cache already autoremovable packages to avoid the first filtering
# for them
if pkg.is_auto_removable:
cache.initial_autoremovable_pkgs.add(pkg.name)
if options.debug and pkg.is_upgradable:
logging.debug("Checking: %s (%s)" % (
pkg.name, getattr(pkg.candidate, "origins", [])))
if (pkg.is_upgradable and
is_pkgname_in_whitelist(pkg.name, whitelisted_pkgs)):
try:
ver_in_allowed_origin(pkg, allowed_origins)
except NoAllowedOriginError:
continue
if not is_pkgname_in_blacklist(pkg.name, blacklisted_pkgs):
try_to_upgrade(pkg,
pkgs_to_upgrade,
pkgs_kept_back,
cache,
allowed_origins,
blacklisted_pkgs,
whitelisted_pkgs)
else:
pkgs_kept_back.append(pkg.name)
return pkgs_to_upgrade, pkgs_kept_back
def get_dpkg_log_content(logfile_dpkg, install_start_time):
# type: (str, datetime.datetime) -> str
logging.debug("Extracting content from %s since %s" % (
logfile_dpkg, install_start_time))
content = []
found_start = False
with io.open(logfile_dpkg, encoding='utf-8', errors='replace') as fp:
# read until we find the last "Log started: "
for line in fp.readlines():
# scan for the first entry we need (minimal-step mode
# creates a new stanza for each individual install)
if not found_start and line.startswith("Log started: "):
stanza_start = LoggingDateTime.from_string(
line[len("Log started: "):-1])
if stanza_start >= install_start_time:
found_start = True
if found_start:
content.append(line)
return "".join(content)
def get_auto_removable(cache):
# type: (apt.Cache) -> AbstractSet[str]
return {pkg.name for pkg in cache
if pkg.is_auto_removable}
def is_autoremove_valid(cache, pkgname, auto_removable, blacklisted_pkgs,
whitelisted_pkgs):
# type: (apt.Cache, str, AbstractSet[str], List[str], List[str]) -> bool
changes = cache.get_changes()
if not changes:
# package is already removed
return True
pkgnames = {pkg.name for pkg in changes}
for pkg in changes:
if not is_pkg_change_allowed(pkg, blacklisted_pkgs, whitelisted_pkgs):
logging.warning(
_("Keeping the following auto-removable package(s) because "
"they include %s which is set to be kept unmodified: %s"),
pkg.name, " ".join(sorted(pkgnames)))
return False
if not pkgnames.issubset(auto_removable):
if pkgname != "":
logging.warning(
_("Keeping auto-removable %s package(s) because it would"
" also remove the following packages which should "
"be kept in this step: %s"), pkgname,
" ".join(sorted(pkgnames - auto_removable)))
else:
logging.warning(
_("Keeping %s auto-removable package(s) because it would"
" also remove the following packages which should "
"be kept in this step: %s"), len(auto_removable),
" ".join(sorted(pkgnames - auto_removable)))
return False
for packagename in pkgnames:
if cache.running_kernel_pkgs_regexp and \
cache.running_kernel_pkgs_regexp.match(packagename):
logging.warning(
_("Keeping the following auto-removable package(s) because "
"they include %s which package is related to the running "
"kernel: %s"), packagename, " ".join(sorted(pkgnames)))
return False
return True
def do_auto_remove(cache, # type: apt.Cache
auto_removable, # type: AbstractSet[str]
logfile_dpkg, # type: str
minimal_steps, # type: bool
blacklisted_pkgs, # type: List[str]
whitelisted_pkgs, # type: List[str]
verbose=False, # type: bool
dry_run=False # type: bool
):
# type: (...) -> Tuple[bool, List[str], List[str]]
if not auto_removable:
return (True, [], [])
pkgs_removed = [] # type: List[str]
pkgs_kept_installed = [] # type: List[str]
if minimal_steps:
for pkgname in auto_removable:
if should_stop():
pkgs_kept_installed = list(auto_removable - set(pkgs_removed))
return (False, pkgs_removed, pkgs_kept_installed)
logging.debug("marking %s for removal" % pkgname)
if pkgname in pkgs_removed:
continue
cache[pkgname].mark_delete()
if not is_autoremove_valid(cache, pkgname, auto_removable,
blacklisted_pkgs, whitelisted_pkgs):
# this situation can occur when removing newly unused packages
# would also remove old unused packages which are not set
# for removal, thus getting there is not handled as an error
pkgs_kept_installed.append(pkgname)
res = True
cache.clear()
continue
if not dry_run:
changes = cache.get_changes()
pkgnames = {pkg.name for pkg in changes}
res, error = cache_commit(cache, logfile_dpkg, verbose)
if not res:
break
pkgs_removed.extend(pkgnames)
else:
res = True
cache.clear()
else:
for pkgname in auto_removable:
cache[pkgname].mark_delete()
if is_autoremove_valid(cache, "", auto_removable, blacklisted_pkgs,
whitelisted_pkgs):
# do it in one step
if not dry_run:
res, error = cache_commit(cache, logfile_dpkg, verbose)
else:
res = True
cache.clear()
else:
cache.clear()
if res:
logging.info(_("Packages that were successfully auto-removed: %s"),
" ".join(sorted(pkgs_removed)))
logging.info(_("Packages that are kept back: %s"),
" ".join(sorted(pkgs_kept_installed)))
if not res:
logging.error(_("Auto-removing the packages failed!"))
logging.error(_("Error message: %s"), error)
logging.error(_("dpkg returned an error! See %s for details"),
logfile_dpkg)
return (res, pkgs_removed, pkgs_kept_installed)
def clean_downloaded_packages(fetcher):
# type: (apt_pkg.Acquire) -> None
archivedir = os.path.dirname(
apt_pkg.config.find_dir("Dir::Cache::archives"))
for item in fetcher.items:
if os.path.dirname(os.path.abspath(item.destfile)) == archivedir:
try:
os.unlink(item.destfile)
except OSError:
pass
def is_update_day():
# type: () -> bool
# check if patch days are configured
patch_days = apt_pkg.config.value_list("Unattended-Upgrade::Update-Days")
if not patch_days:
return True
# validate patch days
today = date.today()
# abbreviated localized dayname
if today.strftime("%a") in patch_days:
return True
# full localized dayname
if today.strftime("%A") in patch_days:
return True
# by number (Sun: 0, Mon: 1, ...)
if today.strftime("%w") in patch_days:
return True
# today is not a patch day
logging.info(
"Skipping update check: today is %s,%s,%s but patch days are %s",
today.strftime("%w"), today.strftime("%a"), today.strftime("%A"),
", ".join(patch_days))
return False
def main(options, rootdir=""):
# type: (Options, str) -> int
# useful for testing
if rootdir:
_setup_alternative_rootdir(rootdir)
# setup logging
mem_log = _setup_logging(options)
# check if today is a patch day
if not is_update_day():
return 0
# check to see if want to auto-upgrade the devel release
if "(development branch)" in DISTRO_DESC and not\
apt_pkg.config.find_b("Unattended-Upgrade::DevRelease", False):
logging.info(_("Not running on the development release."))
return 0
# format (origin, archive), e.g. ("Ubuntu","dapper-security")
allowed_origins = get_allowed_origins()
# pkgs that are (for some reason) not safe to install
blacklisted_pkgs = get_blacklisted_pkgs()
logging.info(_("Initial blacklisted packages: %s"),
" ".join(blacklisted_pkgs))
# install only these packages regardless of other upgrades available
whitelisted_pkgs = get_whitelisted_pkgs()
logging.info(_("Initial whitelisted packages: %s"),
" ".join(whitelisted_pkgs))
logging.info(_("Starting unattended upgrades script"))
# lock for the shutdown check
shutdown_lock = apt_pkg.get_lock(LOCK_FILE)
if shutdown_lock < 0:
logging.error("Lock file is already taken, exiting")
sys.exit(1)
# display available origin
logging.info(_("Allowed origins are: %s"), ", ".join(allowed_origins))
# see debian #776752
install_start_time = datetime.datetime.now().replace(microsecond=0)
# check if the journal is dirty and if so, take emergceny action
# the alternative is to leave the system potentially unsecure until
# the user comes in and fixes
if (is_dpkg_journal_dirty() and
apt_pkg.config.find_b(
"Unattended-Upgrade::AutoFixInterruptedDpkg", True)):
# ensure the dpkg database is not already locked (LP: #754330)
admindir = os.path.dirname(apt_pkg.config.find("Dir::State::Status"))
lockfd = apt_pkg.get_lock(os.path.join(admindir, "lock"), False)
if lockfd > 0:
logging.warning(
_("Unclean dpkg state detected, trying to correct"))
print(_("Unclean dpkg state detected, trying to correct"))
env = copy.copy(os.environ)
env["DEBIAN_FRONTEND"] = "noninteractive"
try:
os.close(lockfd)
output = subprocess.check_output(
["dpkg", "--force-confold", "--configure", "-a"],
env=env,
universal_newlines=True)
except subprocess.CalledProcessError as e:
output = e.output
logging.warning(_("dpkg --configure -a output:\n%s"), output)
else:
logging.debug("Unclean dpkg state, but locked, another package "
"manager working?")
# check and get lock
try:
apt_pkg.pkgsystem_lock()
except SystemError as e:
logging.error(_("Lock could not be acquired (another package "
"manager running?)"))
print(_("Cache lock can not be acquired, exiting"))
sys.exit(1)
# get a cache
try:
cache = UnattendedUpgradesCache(rootdir=rootdir,
allowed_origins=allowed_origins)
except SystemError as error:
print(_("Apt returned an error, exiting"))
print(_("error message: %s") % error)
logging.error(_("Apt returned an error, exiting"))
logging.error(_("error message: %s"), error)
sys.exit(1)
if cache._depcache.broken_count > 0:
print(_("Cache has broken packages, exiting"))
logging.error(_("Cache has broken packages, exiting"))
sys.exit(1)
# FIXME: make this into a ContextManager
# be nice when calculating the upgrade as its pretty CPU intensive
old_priority = os.nice(0)
try:
# Check that we will be able to restore the priority
os.nice(-1)
os.nice(20)
except OSError as e:
if e.errno in (errno.EPERM, errno.EACCES):
pass
else:
raise
# speed things up with latest apt
actiongroup = apt_pkg.ActionGroup(cache._depcache)
actiongroup # pyflakes
# find out about the packages that are upgradable (in an allowed_origin)
pkgs_to_upgrade, pkgs_kept_back = calculate_upgradable_pkgs(
cache, options, allowed_origins, blacklisted_pkgs, whitelisted_pkgs)
pkgs_to_upgrade.sort(key=lambda p: p.name)
pkgs = "\n".join([pkg.name for pkg in pkgs_to_upgrade])
logging.debug("pkgs that look like they should be upgraded: %s" % pkgs)
# FIXME: make this into a ContextManager
# stop being nice
os.nice(old_priority - os.nice(0))
# download what looks good
if options.debug:
fetcher = apt_pkg.Acquire(apt.progress.text.AcquireProgress())
else:
fetcher = apt_pkg.Acquire()
list = apt_pkg.SourceList()
list.read_main_list()
recs = cache._records
pm = apt_pkg.PackageManager(cache._depcache)
# don't start downloading during shutdown
# TODO: download files one by one and check for stop request after each of
# them
if should_stop():
return 1
try:
pm.get_archives(fetcher, list, recs)
except SystemError as e:
logging.error(_("GetArchives() failed: %s"), e)
try:
res = fetcher.run()
logging.debug("fetch.run() result: %s", res)
except SystemError as e:
logging.error("fetch.run() result: %s", e)
if options.download_only:
return 0
pkg_conffile_prompt = False
if dpkg_conffile_prompt():
# now check the downloaded debs for conffile conflicts and build
# a blacklist
for item in fetcher.items:
logging.debug("%s" % item)
if item.status == item.STAT_ERROR:
print(_("An error occurred: %s") % item.error_text)
logging.error(_("An error occurred: %s"), item.error_text)
if not item.complete:
print(_("The URI %s failed to download, aborting") %
item.desc_uri)
logging.error(_("The URI %s failed to download, aborting"),
item.desc_uri)
sys.exit(1)
if not os.path.exists(item.destfile):
print(_("Download finished, but file %s not there?!?") %
item.destfile)
logging.error("Download finished, but file %s not "
"there?!?", item.destfile)
sys.exit(1)
if not item.is_trusted:
blacklisted_pkgs.append(pkgname_from_deb(item.destfile))
if conffile_prompt(item.destfile):
# skip package (means to re-run the whole marking again
# and making sure that the package will not be pulled in by
# some other package again!)
#
# print to stdout to ensure that this message is part of
# the cron mail (only if no summary mail is requested)
email = apt_pkg.config.find("Unattended-Upgrade::Mail", "")
if not email:
print(_("Package %s has conffile prompt and needs "
"to be upgraded manually") %
pkgname_from_deb(item.destfile))
# log to the logfile
logging.warning(_("Package %s has conffile prompt and "
"needs to be upgraded manually"),
pkgname_from_deb(item.destfile))
blacklisted_pkgs.append(pkgname_from_deb(item.destfile))
pkgs_kept_back.append(pkgname_from_deb(item.destfile))
pkg_conffile_prompt = True
# redo the selection about the packages to upgrade based on the new
# blacklist
logging.debug("blacklist: %s" % blacklisted_pkgs)
# whitelist
logging.debug("whitelist: %s" % whitelisted_pkgs)
# find out about the packages that are upgradable (in a allowed_origin)
if len(blacklisted_pkgs) > 0 or len(whitelisted_pkgs) > 0:
cache.clear()
old_pkgs_to_upgrade = pkgs_to_upgrade[:]
pkgs_to_upgrade = []
for pkg in old_pkgs_to_upgrade:
logging.debug("Checking the black and whitelist: %s" %
(pkg.name))
cache.mark_upgrade_adjusted(
pkg, from_user=not pkg.is_auto_installed)
if check_changes_for_sanity(cache,
allowed_origins,
blacklisted_pkgs,
whitelisted_pkgs):
pkgs_to_upgrade.append(pkg)
else:
if not (pkg.name in pkgs_kept_back):
pkgs_kept_back.append(pkg.name)
logging.info(_("package %s not upgraded"), pkg.name)
cache.clear()
for pkg2 in pkgs_to_upgrade:
cache.call_adjusted(
apt.package.Package.mark_upgrade, pkg2,
from_user=not pkg2.is_auto_installed)
else:
logging.debug("dpkg is configured not to cause conffile prompts")
# get log
logfile_dpkg = os.path.join(_get_logdir(), 'unattended-upgrades-dpkg.log')
if not os.path.exists(logfile_dpkg):
with open(logfile_dpkg, 'w'):
pass
# auto-removals
auto_removable = cache.initial_autoremovable_pkgs
kernel_pkgs_remove_success = True # type: bool
kernel_pkgs_removed = [] # type: List[str]
kernel_pkgs_kept_installed = [] # type: List[str]
if (auto_removable and apt_pkg.config.find_b(
"Unattended-Upgrade::Remove-Unused-Kernel-Packages", True)):
# remove unused kernels before installing new ones because the newly
# installed ones may fill up /boot and break the system right before
# removing old ones could take place
#
# this step may also remove _auto-removable_ reverse dependencies
# of kernel packages
auto_removable_kernel_pkgs = {
p for p in auto_removable
if (cache.versioned_kernel_pkgs_regexp and
cache.versioned_kernel_pkgs_regexp.match(p) and
not cache.running_kernel_pkgs_regexp.match(p))}
if auto_removable_kernel_pkgs:
logging.info(_("Removing unused kernel packages: %s"),
" ".join(auto_removable_kernel_pkgs))
(kernel_pkgs_remove_success,
kernel_pkgs_removed,
kernel_pkgs_kept_installed) = do_auto_remove(
cache, auto_removable_kernel_pkgs,
logfile_dpkg, use_minimal_steps(options),
blacklisted_pkgs, whitelisted_pkgs,
options.verbose or options.debug, options.dry_run)
auto_removable = get_auto_removable(cache)
previous_autoremovals = auto_removable
if apt_pkg.config.find_b(
"Unattended-Upgrade::Remove-Unused-Dependencies", False):
pending_autoremovals = previous_autoremovals
else:
pending_autoremovals = set()
# exit if there is nothing to do and nothing to report
if (len(pending_autoremovals) == 0 and
len(pkgs_to_upgrade) == 0 and
len(pkgs_kept_back) == 0):
logging.info(_("No packages found that can be upgraded unattended "
"and no pending auto-removals"))
# FIXME: DRY violation, write_stamp_file() is used below as well
write_stamp_file()
# check if we couldn't reboot on previous run because
# a user was logged-in at this time
os.close(shutdown_lock)
# never reboot during a dry run
if not options.dry_run:
reboot_if_requested_and_needed()
return 0
# check if its configured for install on shutdown, if so, the
# environment UNATTENDED_UPGRADES_FORCE_INSTALL_ON_SHUTDOWN will
# be set by the unatteded-upgrades-shutdown script
if ("UNATTENDED_UPGRADES_FORCE_INSTALL_ON_SHUTDOWN" not in os.environ and
apt_pkg.config.find_b(
"Unattended-Upgrade::InstallOnShutdown", False)):
logger = logging.getLogger()
logger.debug("Configured to install on shutdown, so exiting now")
os.close(shutdown_lock)
return 0
# check if we are in dry-run mode
if options.dry_run:
logging.info("Option --dry-run given, *not* performing real actions")
apt_pkg.config.set("Debug::pkgDPkgPM", "1")
# do the install based on the new list of pkgs
pkgs = " ".join([pkg.name for pkg in pkgs_to_upgrade])
logging.info(_("Packages that will be upgraded: %s"), pkgs)
# only perform install step if we actually have packages to install
pkg_install_success = True
if len(pkgs_to_upgrade) > 0:
# do install
pkg_install_success = do_install(cache,
pkgs_to_upgrade,
blacklisted_pkgs,
whitelisted_pkgs,
options,
logfile_dpkg)
# Was the overall run succesful: only if everything installed
# fine and nothing was held back because of a conffile prompt.
successful_run = (kernel_pkgs_remove_success and pkg_install_success and
not pkg_conffile_prompt)
# now check if any auto-removing needs to be done
if cache._depcache.broken_count > 0:
print(_("Cache has broken packages, exiting"))
logging.error(_("Cache has broken packages, exiting"))
sys.exit(1)
# the user wants *all* auto-removals to be removed
# (unless u-u got signalled to stop gracefully quickly)
pkgs_removed = [] # type: List[str]
pkgs_kept_installed = [] # type: List[str]
if ((apt_pkg.config.find_b(
"Unattended-Upgrade::Remove-Unused-Dependencies", False) and
not SIGNAL_STOP_REQUEST)):
auto_removals = get_auto_removable(cache)
(pkg_remove_success,
pkgs_removed,
pkgs_kept_installed) = do_auto_remove(
cache, auto_removals, logfile_dpkg, use_minimal_steps(options),
blacklisted_pkgs, whitelisted_pkgs,
options.verbose or options.debug,
options.dry_run)
successful_run = successful_run and pkg_remove_success
# the user wants *only new* auto-removals to be removed
elif apt_pkg.config.find_b(
"Unattended-Upgrade::Remove-New-Unused-Dependencies", True):
# calculate the new auto-removals
new_pending_autoremovals = get_auto_removable(cache)
auto_removals = new_pending_autoremovals - previous_autoremovals
(pkg_remove_success,
pkgs_removed,
pkgs_kept_installed) = do_auto_remove(
cache, auto_removals, logfile_dpkg, use_minimal_steps(options),
blacklisted_pkgs, whitelisted_pkgs,
options.verbose or options.debug,
options.dry_run)
successful_run = successful_run and pkg_remove_success
logging.debug("InstCount=%i DelCount=%i BrokenCount=%i"
% (cache._depcache.inst_count,
cache._depcache.del_count,
cache._depcache.broken_count))
# send a mail (if needed)
if not options.dry_run:
log_content = get_dpkg_log_content(logfile_dpkg, install_start_time)
send_summary_mail(
pkgs, successful_run,
pkgs_kept_back,
kernel_pkgs_removed + pkgs_removed,
kernel_pkgs_kept_installed + pkgs_kept_installed,
mem_log, log_content)
# clean after success install (if needed)
keep_key = "Unattended-Upgrade::Keep-Debs-After-Install"
if (not apt_pkg.config.find_b(keep_key, False) and
not options.dry_run and
pkg_install_success):
clean_downloaded_packages(fetcher)
# FIXME: DRY violation, write_stamp_file() is used above as well
# write timestamp file
write_stamp_file()
os.close(shutdown_lock)
# check if the user wants a reboot
if not options.dry_run:
reboot_if_requested_and_needed()
if successful_run:
return 0
else:
return 1
class Options:
def __init__(self):
self.download_only = False
self.dry_run = False
self.debug = False
self.apt_debug = False
self.verbose = False
self.minimal_upgrade_steps = False
if __name__ == "__main__":
localesApp = "unattended-upgrades"
localesDir = "/usr/share/locale"
gettext.bindtextdomain(localesApp, localesDir)
gettext.textdomain(localesApp)
# this ensures the commandline is logged in /var/log/apt/history.log
apt_pkg.config.set("Commandline::AsString", " ".join(sys.argv))
# init the options
parser = OptionParser()
parser.add_option("-d", "--debug",
action="store_true", default=False,
help=_("print debug messages"))
parser.add_option("", "--apt-debug",
action="store_true", default=False,
help=_("make apt/libapt print verbose debug messages"))
parser.add_option("-v", "--verbose",
action="store_true", default=False,
help=_("print info messages"))
parser.add_option("", "--dry-run",
action="store_true", default=False,
help=_("Simulation, download but do not install"))
parser.add_option("", "--download-only",
action="store_true", default=False,
help=_("Only download, do not even try to install."))
parser.add_option("", "--minimal-upgrade-steps",
action="store_true", default=False,
help=_("Upgrade in minimal steps (and allow "
"interrupting with SIGTERM"))
parser.add_option("", "--minimal_upgrade_steps",
action="store_true",
help=SUPPRESS_HELP,
default=False)
(options, args) = parser.parse_args() # type: ignore
if os.getuid() != 0:
print(_("You need to be root to run this application"))
sys.exit(1)
# ensure that we are not killed when the terminal goes away e.g. on
# shutdown
signal.signal(signal.SIGHUP, signal.SIG_IGN)
# setup signal handler for graceful stopping
signal.signal(signal.SIGTERM, signal_handler)
# write pid to let other processes find this one
pidf = os.path.join(apt_pkg.config.find_dir("Dir"),
"var", "run", "unattended-upgrades.pid")
# clean up pid file on exit
with open(pidf, "w") as fp:
fp.write("%s" % os.getpid())
atexit.register(os.remove, pidf)
# run the main code
sys.exit(main(options))
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