150 lines
4.6 KiB
Python
150 lines
4.6 KiB
Python
#!/usr/bin/python2 -O
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# vim: fileencoding=utf-8
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#
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# The Qubes OS Project, https://www.qubes-os.org/
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#
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# Copyright (C) 2010-2015 Joanna Rutkowska <joanna@invisiblethingslab.com>
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# Copyright (C) 2013-2015 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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# Copyright (C) 2014-2015 Wojtek Porczyk <woju@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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import hashlib
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import os
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import re
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import subprocess
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import docutils
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import docutils.core
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import docutils.io
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import qubes.exc
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def get_timezone():
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# fc18
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if os.path.islink('/etc/localtime'):
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return '/'.join(os.readlink('/etc/localtime').split('/')[-2:])
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# <=fc17
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elif os.path.exists('/etc/sysconfig/clock'):
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clock_config = open('/etc/sysconfig/clock', "r")
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clock_config_lines = clock_config.readlines()
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clock_config.close()
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zone_re = re.compile(r'^ZONE="(.*)"')
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for line in clock_config_lines:
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line_match = zone_re.match(line)
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if line_match:
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return line_match.group(1)
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else:
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# last resort way, some applications makes /etc/localtime
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# hardlink instead of symlink...
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tz_info = os.stat('/etc/localtime')
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if not tz_info:
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return None
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if tz_info.st_nlink > 1:
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p = subprocess.Popen(['find', '/usr/share/zoneinfo',
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'-inum', str(tz_info.st_ino), '-print', '-quit'],
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stdout=subprocess.PIPE)
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tz_path = p.communicate()[0].strip()
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return tz_path.replace('/usr/share/zoneinfo/', '')
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return None
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def format_doc(docstring):
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'''Return parsed documentation string, stripping RST markup.
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'''
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if not docstring:
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return ''
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# pylint: disable=unused-variable
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output, pub = docutils.core.publish_programmatically(
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source_class=docutils.io.StringInput,
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source=' '.join(docstring.strip().split()),
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source_path=None,
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destination_class=docutils.io.NullOutput, destination=None,
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destination_path=None,
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reader=None, reader_name='standalone',
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parser=None, parser_name='restructuredtext',
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writer=None, writer_name='null',
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settings=None, settings_spec=None, settings_overrides=None,
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config_section=None, enable_exit_status=None)
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return pub.writer.document.astext()
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# FIXME those are wrong, k/M/G are SI prefixes and means 10**3
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# maybe adapt https://code.activestate.com/recipes/578019
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def parse_size(size):
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units = [
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('K', 1000), ('KB', 1000),
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('M', 1000 * 1000), ('MB', 1000 * 1000),
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('G', 1000 * 1000 * 1000), ('GB', 1000 * 1000 * 1000),
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('Ki', 1024), ('KiB', 1024),
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('Mi', 1024 * 1024), ('MiB', 1024 * 1024),
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('Gi', 1024 * 1024 * 1024), ('GiB', 1024 * 1024 * 1024),
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]
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size = size.strip().upper()
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if size.isdigit():
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return int(size)
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for unit, multiplier in units:
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if size.endswith(unit):
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size = size[:-len(unit)].strip()
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return int(size) * multiplier
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raise qubes.exc.QubesException("Invalid size: {0}.".format(size))
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def mbytes_to_kmg(size):
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if size > 1024:
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return "%d GiB" % (size / 1024)
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else:
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return "%d MiB" % size
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def kbytes_to_kmg(size):
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if size > 1024:
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return mbytes_to_kmg(size / 1024)
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else:
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return "%d KiB" % size
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def bytes_to_kmg(size):
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if size > 1024:
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return kbytes_to_kmg(size / 1024)
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else:
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return "%d B" % size
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def size_to_human(size):
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"""Humane readable size, with 1/10 precision"""
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if size < 1024:
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return str(size)
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elif size < 1024 * 1024:
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return str(round(size / 1024.0, 1)) + ' KiB'
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elif size < 1024 * 1024 * 1024:
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return str(round(size / (1024.0 * 1024), 1)) + ' MiB'
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else:
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return str(round(size / (1024.0 * 1024 * 1024), 1)) + ' GiB'
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def urandom(size):
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rand = os.urandom(size)
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if rand is None:
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raise IOError('failed to read urandom')
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return hashlib.sha512(rand).digest()
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