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# Copyright (C) 2006, 2009 Canonical Ltd.
# Written by Michael Vogt <michael.vogt@ubuntu.com> and
# Colin Watson <cjwatson@ubuntu.com>.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# Update the installer from the network.
from __future__ import print_function
import sys
import os
import syslog
import apt
import apt_pkg
from ubiquity import misc
MAGIC_MARKER = "/var/run/ubiquity.updated"
# Make sure that ubiquity is last, otherwise apt may try to install another
# frontend.
UBIQUITY_PKGS = ["ubiquity-casper",
"ubiquity-frontend-debconf",
"ubiquity-frontend-gtk",
"ubiquity-frontend-kde",
"ubiquity-ubuntu-artwork",
"ubiquity"]
class CacheProgressDebconfProgressAdapter(apt.progress.base.OpProgress):
def __init__(self, frontend):
self.frontend = frontend
self.frontend.debconf_progress_start(
0, 100, self.frontend.get_string('reading_package_information'))
def update(self, percent=None):
super().update(percent)
self.frontend.debconf_progress_set(self.percent)
self.frontend.refresh()
def really_done(self):
# Unfortunately the process of opening a Cache calls done() twice,
# so we have to take care of this manually.
self.frontend.debconf_progress_stop()
class AcquireProgressDebconfProgressAdapter(apt.progress.base.AcquireProgress):
def __init__(self, frontend):
apt.progress.base.AcquireProgress.__init__(self)
self.frontend = frontend
def pulse(self, owner):
apt.progress.base.AcquireProgress.pulse(self, owner)
if self.current_cps > 0:
info = self.frontend.get_string('apt_progress_cps')
info = info.replace(
'${SPEED}', apt_pkg.size_to_str(self.current_cps))
else:
info = self.frontend.get_string('apt_progress')
info = info.replace('${INDEX}', str(self.current_items))
info = info.replace('${TOTAL}', str(self.total_items))
self.frontend.debconf_progress_info(info)
self.frontend.debconf_progress_set(
((self.current_bytes + self.current_items) * 100.0) /
float(self.total_bytes + self.total_items))
self.frontend.refresh()
return True
def stop(self):
self.frontend.debconf_progress_stop()
def start(self):
self.frontend.debconf_progress_start(
0, 100, self.frontend.get_string('updating_package_information'))
class InstallProgressDebconfProgressAdapter(apt.progress.base.InstallProgress):
def __init__(self, frontend):
apt.progress.base.InstallProgress.__init__(self)
self.frontend = frontend
def status_change(self, unused_pkg, percent, unused_status):
self.frontend.debconf_progress_set(percent)
def start_update(self):
self.frontend.debconf_progress_start(
0, 100, self.frontend.get_string('installing_update'))
def finish_update(self):
self.frontend.debconf_progress_stop()
def update_interface(self):
apt.progress.base.InstallProgress.update_interface(self)
self.frontend.refresh()
@misc.raise_privileges
def update(frontend):
frontend.debconf_progress_start(
0, 3, frontend.get_string('checking_for_installer_updates'))
# check if we have updates
cache_progress = CacheProgressDebconfProgressAdapter(frontend)
cache = apt.Cache(cache_progress)
cache_progress.really_done()
acquire_progress = AcquireProgressDebconfProgressAdapter(frontend)
try:
cache.update(acquire_progress)
cache_progress = CacheProgressDebconfProgressAdapter(frontend)
cache = apt.Cache(cache_progress)
cache_progress.really_done()
updates = [pkg for pkg in UBIQUITY_PKGS
if pkg in cache and cache[pkg].is_upgradable]
except IOError as e:
print("ERROR: cache.update() returned: '%s'" % e)
updates = []
if not updates:
frontend.debconf_progress_stop()
return False
# We have something to upgrade. Shut down debconf-communicator for
# the duration, otherwise we'll have locking problems.
if frontend.dbfilter is not None and frontend.dbfilter.db is not None:
frontend.stop_debconf()
frontend.dbfilter.db = None
stopped_debconf = True
else:
stopped_debconf = False
try:
# install the updates
os.environ['DPKG_UNTRANSLATED_MESSAGES'] = '1'
fixer = apt.ProblemResolver(cache)
for pkg in updates:
cache[pkg].mark_install(auto_fix=False)
fixer.clear(cache[pkg])
fixer.protect(cache[pkg])
fixer.resolve()
try:
# dpkg will talk to stdout. We'd rather have this in the debug
# log file.
old_stdout = os.dup(1)
os.dup2(2, 1)
cache.commit(AcquireProgressDebconfProgressAdapter(frontend),
InstallProgressDebconfProgressAdapter(frontend))
except (SystemError, IOError) as e:
syslog.syslog(syslog.LOG_ERR,
"Error installing the update: '%s'" % e)
title = frontend.get_string('error_updating_installer')
if frontend.locale is None:
extended_locale = 'extended:c'
else:
extended_locale = 'extended:%s' % frontend.locale
msg = frontend.get_string('error_updating_installer',
extended_locale)
msg = msg.replace('${ERROR}', str(e))
frontend.error_dialog(title, msg)
frontend.debconf_progress_stop()
return True
finally:
os.dup2(old_stdout, 1)
os.close(old_stdout)
# all went well, write marker and restart self
# FIXME: we probably want some sort of in-between-restart-splash
# or at least a dialog here
with open(MAGIC_MARKER, "w") as magic_marker:
magic_marker.write("1")
os.execv(sys.argv[0], sys.argv)
return False
finally:
if stopped_debconf:
frontend.start_debconf()
frontend.dbfilter.db = frontend.db
def already_updated():
return os.path.exists(MAGIC_MARKER)
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