core-admin/qubes/utils.py
Wojtek Porczyk 96efb4568a core3: add different exceptions
From now on there are different exceptions which can be raise on
different occasions.

fixes QubesOS/qubes-issues#1279
2015-10-17 00:17:12 +02:00

107 lines
3.6 KiB
Python

#!/usr/bin/python2 -O
# vim: fileencoding=utf-8
#
# The Qubes OS Project, https://www.qubes-os.org/
#
# Copyright (C) 2010-2015 Joanna Rutkowska <joanna@invisiblethingslab.com>
# Copyright (C) 2013-2015 Marek Marczykowski-Górecki
# <marmarek@invisiblethingslab.com>
# Copyright (C) 2014-2015 Wojtek Porczyk <woju@invisiblethingslab.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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
import os
import re
import subprocess
import docutils
import docutils.core
import docutils.io
import qubes.exc
def get_timezone():
# fc18
if os.path.islink('/etc/localtime'):
return '/'.join(os.readlink('/etc/localtime').split('/')[-2:])
# <=fc17
elif os.path.exists('/etc/sysconfig/clock'):
clock_config = open('/etc/sysconfig/clock', "r")
clock_config_lines = clock_config.readlines()
clock_config.close()
zone_re = re.compile(r'^ZONE="(.*)"')
for line in clock_config_lines:
line_match = zone_re.match(line)
if line_match:
return line_match.group(1)
else:
# last resort way, some applications makes /etc/localtime
# hardlink instead of symlink...
tz_info = os.stat('/etc/localtime')
if not tz_info:
return None
if tz_info.st_nlink > 1:
p = subprocess.Popen(['find', '/usr/share/zoneinfo',
'-inum', str(tz_info.st_ino)],
stdout=subprocess.PIPE)
tz_path = p.communicate()[0].strip()
return tz_path.replace('/usr/share/zoneinfo/', '')
return None
def format_doc(docstring):
'''Return parsed documentation string, stripping RST markup.
'''
if not docstring:
return ''
# pylint: disable=unused-variable
output, pub = docutils.core.publish_programmatically(
source_class=docutils.io.StringInput,
source=' '.join(docstring.strip().split()),
source_path=None,
destination_class=docutils.io.NullOutput, destination=None,
destination_path=None,
reader=None, reader_name='standalone',
parser=None, parser_name='restructuredtext',
writer=None, writer_name='null',
settings=None, settings_spec=None, settings_overrides=None,
config_section=None, enable_exit_status=None)
return pub.writer.document.astext()
# FIXME those are wrong, k/M/G are SI prefixes and means 10**3
# maybe adapt https://code.activestate.com/recipes/578019
def parse_size(size):
units = [
('K', 1024), ('KB', 1024),
('M', 1024*1024), ('MB', 1024*1024),
('G', 1024*1024*1024), ('GB', 1024*1024*1024),
]
size = size.strip().upper()
if size.isdigit():
return int(size)
for unit, multiplier in units:
if size.endswith(unit):
size = size[:-len(unit)].strip()
return int(size)*multiplier
raise qubes.exc.QubesException("Invalid size: {0}.".format(size))