614 lines
18 KiB
Python
614 lines
18 KiB
Python
#!/usr/bin/python -O
|
|
# vim: fileencoding=utf-8
|
|
# pylint: disable=too-few-public-methods
|
|
|
|
#
|
|
# The Qubes OS Project, https://www.qubes-os.org/
|
|
#
|
|
# Copyright (C) 2015 Joanna Rutkowska <joanna@invisiblethingslab.com>
|
|
# Copyright (C) 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.
|
|
#
|
|
|
|
'''qvm-ls - List available domains'''
|
|
|
|
|
|
from __future__ import print_function
|
|
|
|
import __builtin__
|
|
import argparse
|
|
import collections
|
|
import sys
|
|
import textwrap
|
|
|
|
import qubes
|
|
import qubes.config
|
|
import qubes.tools
|
|
import qubes.utils
|
|
|
|
|
|
#
|
|
# columns
|
|
#
|
|
|
|
class Column(object):
|
|
'''A column in qvm-ls output characterised by its head, a width and a way
|
|
to fetch a parameter describing the domain.
|
|
|
|
:param str head: Column head (usually uppercase).
|
|
:param int width: Column width.
|
|
:param str attr: Attribute, possibly complex (containing ``.``). This may \
|
|
also be a callable that gets as its only argument the domain.
|
|
:param str fmt: if specified, used as base for :py:meth:`str.format` for \
|
|
column's value
|
|
:param str doc: Description of column (will be visible in --help-columns).
|
|
'''
|
|
|
|
#: collection of all columns
|
|
columns = {}
|
|
|
|
def __init__(self, head, width=0, attr=None, fmt=None, doc=None):
|
|
self.ls_head = head
|
|
self.ls_width = max(width, len(self.ls_head) + 1)
|
|
self._fmt = fmt
|
|
self.__doc__ = doc if doc is None else qubes.utils.format_doc(doc)
|
|
|
|
# intentionally not always do set self._attr,
|
|
# to cause AttributeError in self.format()
|
|
if attr is not None:
|
|
self._attr = attr
|
|
|
|
self.__class__.columns[self.ls_head] = self
|
|
|
|
|
|
def cell(self, vm):
|
|
'''Format one cell.
|
|
|
|
.. note::
|
|
|
|
This is only for technical formatting (filling with space). If you
|
|
want to subclass the :py:class:`Column` class, you should override
|
|
:py:meth:`Column.format` method instead.
|
|
|
|
:param qubes.vm.qubesvm.QubesVM: Domain to get a value from.
|
|
:returns: string that is at least as wide as needed to fill table row.
|
|
:rtype: str
|
|
'''
|
|
|
|
value = self.format(vm) or '-'
|
|
return value.ljust(self.ls_width)
|
|
|
|
|
|
def format(self, vm):
|
|
'''Format one cell value.
|
|
|
|
Return value to put in a table cell.
|
|
|
|
:param qubes.vm.qubesvm.QubesVM: Domain to get a value from.
|
|
:returns: Value to put, or :py:obj:`None` if no value.
|
|
:rtype: str or None
|
|
'''
|
|
|
|
ret = None
|
|
try:
|
|
if isinstance(self._attr, basestring):
|
|
ret = vm
|
|
for attrseg in self._attr.split('.'):
|
|
ret = getattr(ret, attrseg)
|
|
elif isinstance(self._attr, collections.Callable):
|
|
ret = self._attr(vm)
|
|
|
|
except (AttributeError, ZeroDivisionError):
|
|
# division by 0 may be caused by arithmetic in callable attr
|
|
return None
|
|
|
|
if ret is None:
|
|
return None
|
|
|
|
if self._fmt is not None:
|
|
return self._fmt.format(ret)
|
|
|
|
# late import to avoid circular import
|
|
# pylint: disable=redefined-outer-name
|
|
import qubes.vm
|
|
if isinstance(ret, (qubes.vm.BaseVM, qubes.Label)):
|
|
return ret.name
|
|
|
|
return ret
|
|
|
|
|
|
def __repr__(self):
|
|
return '{}(head={!r}, width={!r})'.format(self.__class__.__name__,
|
|
self.ls_head, self.ls_width)
|
|
|
|
|
|
def __eq__(self, other):
|
|
return self.ls_head == other.ls_head
|
|
|
|
|
|
def __lt__(self, other):
|
|
return self.ls_head < other.ls_head
|
|
|
|
|
|
def column(width=0, head=None, fmt=None):
|
|
'''Mark function or plain property as valid column in :program:`qvm-ls`.
|
|
|
|
By default all instances of :py:class:`qubes.property` are valid.
|
|
|
|
:param int width: Column width
|
|
:param str head: Column head (default: take property's name)
|
|
'''
|
|
|
|
def decorator(obj):
|
|
# pylint: disable=missing-docstring
|
|
# we keep hints on fget, so the order of decorators does not matter
|
|
holder = obj.fget if isinstance(obj, __builtin__.property) else obj
|
|
|
|
try:
|
|
holder.ls_head = head or holder.__name__.replace('_', '-').upper()
|
|
except AttributeError:
|
|
raise TypeError('Cannot find default column name '
|
|
'for a strange object {!r}'.format(obj))
|
|
|
|
holder.ls_width = max(width, len(holder.ls_head) + 1)
|
|
holder.ls_fmt = fmt
|
|
|
|
return obj
|
|
|
|
return decorator
|
|
|
|
|
|
class PropertyColumn(Column):
|
|
'''Column that displays value from property (:py:class:`property` or
|
|
:py:class:`qubes.property`) of domain.
|
|
|
|
You shouldn't use this class directly, see :py:func:`column` decorator.
|
|
|
|
:param holder: Holder of magic attributes.
|
|
'''
|
|
|
|
def __init__(self, holder):
|
|
super(PropertyColumn, self).__init__(
|
|
head=holder.ls_head,
|
|
width=holder.ls_width,
|
|
attr=holder.__name__,
|
|
fmt=getattr(holder, 'ls_fmt', None),
|
|
doc=holder.__doc__)
|
|
self.holder = holder
|
|
|
|
def __repr__(self):
|
|
return '{}(head={!r}, width={!r} holder={!r})'.format(
|
|
self.__class__.__name__,
|
|
self.ls_head,
|
|
self.ls_width,
|
|
self.holder)
|
|
|
|
|
|
def process_class(cls):
|
|
'''Process class after definition to find all listable properties.
|
|
|
|
It is used in metaclass of the domain.
|
|
|
|
:param qubes.vm.BaseVMMeta cls: Class to round up.
|
|
'''
|
|
|
|
for prop in cls.__dict__.values():
|
|
holder = prop.fget if isinstance(prop, __builtin__.property) else prop
|
|
if not hasattr(holder, 'ls_head') or holder.ls_head is None:
|
|
continue
|
|
|
|
for col in Column.columns.values():
|
|
if not isinstance(col, PropertyColumn):
|
|
continue
|
|
|
|
if col.holder.__name__ != holder.__name__:
|
|
continue
|
|
|
|
if col.ls_head != holder.ls_head:
|
|
raise TypeError('Found column head mismatch in class {!r} '
|
|
'({!r} != {!r})'.format(cls.__name__,
|
|
holder.ls_head, col.ls_head))
|
|
|
|
if col.ls_width != holder.ls_width:
|
|
raise TypeError('Found column width mismatch in class {!r} '
|
|
'({!r} != {!r})'.format(cls.__name__,
|
|
holder.ls_width, col.ls_width))
|
|
|
|
PropertyColumn(holder)
|
|
|
|
|
|
def flag(field):
|
|
'''Mark method as flag field.
|
|
|
|
:param int field: Which field to fill (counted from 1)
|
|
'''
|
|
|
|
def decorator(obj):
|
|
# pylint: disable=missing-docstring
|
|
obj.field = field
|
|
return obj
|
|
return decorator
|
|
|
|
|
|
def simple_flag(field, letter, attr, doc=None):
|
|
'''Create simple, binary flag.
|
|
|
|
:param str attr: Attribute name to check. If result is true, flag is fired.
|
|
:param str letter: The letter to show.
|
|
'''
|
|
|
|
def helper(self, vm):
|
|
# pylint: disable=missing-docstring,unused-argument
|
|
try:
|
|
value = getattr(vm, attr)
|
|
except AttributeError:
|
|
value = False
|
|
|
|
if value:
|
|
return letter[0]
|
|
|
|
helper.__doc__ = doc
|
|
helper.field = field
|
|
return helper
|
|
|
|
|
|
class StatusColumn(Column):
|
|
'''Some fancy flags that describe general status of the domain.'''
|
|
# pylint: disable=no-self-use
|
|
|
|
def __init__(self):
|
|
super(StatusColumn, self).__init__(
|
|
head='STATUS',
|
|
width=len(self.get_flags()) + 1,
|
|
doc=self.__class__.__doc__)
|
|
|
|
|
|
@flag(1)
|
|
def type(self, vm):
|
|
'''Type of domain.
|
|
|
|
0 AdminVM (AKA Dom0)
|
|
aA AppVM
|
|
dD DisposableVM
|
|
sS StandaloneVM
|
|
tT TemplateVM
|
|
|
|
When it is HVM (optimised VM), the letter is capital.
|
|
'''
|
|
|
|
# late import because of circular dependency
|
|
# pylint: disable=redefined-outer-name
|
|
import qubes.vm
|
|
import qubes.vm.adminvm
|
|
import qubes.vm.appvm
|
|
import qubes.vm.dispvm
|
|
import qubes.vm.hvm
|
|
import qubes.vm.qubesvm
|
|
import qubes.vm.templatevm
|
|
|
|
if isinstance(vm, qubes.vm.adminvm.AdminVM):
|
|
return '0'
|
|
|
|
ret = None
|
|
# TODO right order, depending on inheritance
|
|
if isinstance(vm, qubes.vm.templatevm.TemplateVM):
|
|
ret = 't'
|
|
if isinstance(vm, qubes.vm.appvm.AppVM):
|
|
ret = 'a'
|
|
# if isinstance(vm, qubes.vm.standalonevm.StandaloneVM):
|
|
# ret = 's'
|
|
if isinstance(vm, qubes.vm.dispvm.DispVM):
|
|
ret = 'd'
|
|
|
|
if ret is not None:
|
|
if isinstance(vm, qubes.vm.hvm.HVM):
|
|
return ret.upper()
|
|
else:
|
|
return ret
|
|
|
|
|
|
@flag(2)
|
|
def power(self, vm):
|
|
'''Current power state.
|
|
|
|
r running
|
|
t transient
|
|
p paused
|
|
s suspended
|
|
h halting
|
|
d dying
|
|
c crashed
|
|
? unknown
|
|
'''
|
|
|
|
state = vm.get_power_state().lower()
|
|
if state == 'unknown':
|
|
return '?'
|
|
elif state in ('running', 'transient', 'paused', 'suspended',
|
|
'halting', 'dying', 'crashed'):
|
|
return state[0]
|
|
|
|
|
|
updateable = simple_flag(3, 'U', 'updateable',
|
|
doc='If the domain is updateable.')
|
|
|
|
provides_network = simple_flag(4, 'N', 'provides_network',
|
|
doc='If the domain provides network.')
|
|
|
|
installed_by_rpm = simple_flag(5, 'R', 'installed_by_rpm',
|
|
doc='If the domain is installed by RPM.')
|
|
|
|
internal = simple_flag(6, 'i', 'internal',
|
|
doc='If the domain is internal (not normally shown, no appmenus).')
|
|
|
|
debug = simple_flag(7, 'D', 'debug',
|
|
doc='If the domain is being debugged.')
|
|
|
|
autostart = simple_flag(8, 'A', 'autostart',
|
|
doc='If the domain is marked for autostart.')
|
|
|
|
# TODO (not sure if really):
|
|
# include in backups
|
|
# uses_custom_config
|
|
|
|
def _no_flag(self, vm):
|
|
'''Reserved for future use.'''
|
|
|
|
|
|
@classmethod
|
|
def get_flags(cls):
|
|
'''Get all flags as list.
|
|
|
|
Holes between flags are filled with :py:meth:`_no_flag`.
|
|
|
|
:rtype: list
|
|
'''
|
|
|
|
flags = {}
|
|
for mycls in cls.__mro__:
|
|
for attr in mycls.__dict__.values():
|
|
if not hasattr(attr, 'field'):
|
|
continue
|
|
if attr.field in flags:
|
|
continue
|
|
flags[attr.field] = attr
|
|
|
|
return [(flags[i] if i in flags else cls._no_flag)
|
|
for i in range(1, max(flags) + 1)]
|
|
|
|
|
|
def format(self, vm):
|
|
return ''.join((flag(self, vm) or '-') for flag in self.get_flags())
|
|
|
|
|
|
# todo maxmem
|
|
|
|
Column('GATEWAY', width=15,
|
|
attr='netvm.gateway',
|
|
doc='Network gateway.')
|
|
|
|
Column('MEMORY', width=5,
|
|
attr=(lambda vm: vm.get_mem()/1024 if vm.is_running() else None),
|
|
doc='Memory currently used by VM')
|
|
|
|
Column('DISK', width=5,
|
|
attr=(lambda vm: vm.get_disk_utilization()/1024/1024),
|
|
doc='Total disk utilisation.')
|
|
|
|
|
|
Column('PRIV-CURR', width=5,
|
|
attr=(lambda vm: vm.get_disk_utilization_private_img()/1024/1024),
|
|
fmt='{:.0f}',
|
|
doc='Disk utilisation by private image (/home, /usr/local).')
|
|
|
|
Column('PRIV-MAX', width=5,
|
|
attr=(lambda vm: vm.get_private_img_sz()/1024/1024),
|
|
fmt='{:.0f}',
|
|
doc='Maximum available space for private image.')
|
|
|
|
Column('PRIV-USED', width=5,
|
|
attr=(lambda vm: vm.get_disk_utilization_private_img() * 100
|
|
/ vm.get_private_img_sz()),
|
|
fmt='{:.0f}',
|
|
doc='Disk utilisation by private image as a percentage of available space.')
|
|
|
|
|
|
Column('ROOT-CURR', width=5,
|
|
attr=(lambda vm: vm.get_disk_utilization_private_img()/1024/1024),
|
|
fmt='{:.0f}',
|
|
doc='Disk utilisation by root image (/usr, /lib, /etc, ...).')
|
|
|
|
Column('ROOT-MAX', width=5,
|
|
attr=(lambda vm: vm.get_private_img_sz()/1024/1024),
|
|
fmt='{:.0f}',
|
|
doc='Maximum available space for root image.')
|
|
|
|
Column('ROOT-USED', width=5,
|
|
attr=(lambda vm: vm.get_disk_utilization_private_img() * 100
|
|
/ vm.get_private_img_sz()),
|
|
fmt='{:.0f}',
|
|
doc='Disk utilisation by root image as a percentage of available space.')
|
|
|
|
|
|
StatusColumn()
|
|
|
|
|
|
class Table(object):
|
|
'''Table that is displayed to the user.
|
|
|
|
:param qubes.Qubes app: Qubes application object.
|
|
:param list colnames: Names of the columns (need not to be uppercase).
|
|
'''
|
|
def __init__(self, app, colnames):
|
|
self.app = app
|
|
self.columns = tuple(Column.columns[col.upper()] for col in colnames)
|
|
|
|
|
|
def format_head(self):
|
|
'''Format table head (all column heads).'''
|
|
return ''.join('{head:{width}s}'.format(
|
|
head=col.ls_head, width=col.ls_width)
|
|
for col in self.columns[:-1]) + \
|
|
self.columns[-1].ls_head
|
|
|
|
|
|
def format_row(self, vm):
|
|
'''Format single table row (all columns for one domain).'''
|
|
return ''.join(col.cell(vm) for col in self.columns)
|
|
|
|
|
|
def write_table(self, stream=sys.stdout):
|
|
'''Write whole table to file-like object.
|
|
|
|
:param file stream: Stream to write the table to.
|
|
'''
|
|
|
|
stream.write(self.format_head() + '\n')
|
|
for vm in self.app.domains:
|
|
stream.write(self.format_row(vm) + '\n')
|
|
|
|
|
|
#: Available formats. Feel free to plug your own one.
|
|
formats = {
|
|
'simple': ('name', 'status', 'label', 'template', 'netvm'),
|
|
'network': ('name', 'status', 'netvm', 'ip', 'ipback', 'gateway'),
|
|
'full': ('name', 'status', 'label', 'qid', 'xid', 'uuid'),
|
|
# 'perf': ('name', 'status', 'cpu', 'memory'),
|
|
'disk': ('name', 'status', 'disk',
|
|
'priv-curr', 'priv-max', 'priv-used',
|
|
'root-curr', 'root-max', 'root-used'),
|
|
}
|
|
|
|
|
|
class _HelpColumnsAction(argparse.Action):
|
|
'''Action for argument parser that displays all columns and exits.'''
|
|
# pylint: disable=redefined-builtin
|
|
def __init__(self,
|
|
option_strings,
|
|
dest=argparse.SUPPRESS,
|
|
default=argparse.SUPPRESS,
|
|
help='list all available columns with short descriptions and exit'):
|
|
super(_HelpColumnsAction, self).__init__(
|
|
option_strings=option_strings,
|
|
dest=dest,
|
|
default=default,
|
|
nargs=0,
|
|
help=help)
|
|
|
|
def __call__(self, parser, namespace, values, option_string=None):
|
|
width = max(len(column.ls_head) for column in Column.columns.values())
|
|
wrapper = textwrap.TextWrapper(width=80,
|
|
initial_indent=' ', subsequent_indent=' ' * (width + 6))
|
|
|
|
text = 'Available columns:\n' + '\n'.join(
|
|
wrapper.fill('{head:{width}s} {doc}'.format(
|
|
head=column.ls_head,
|
|
doc=column.__doc__ or '',
|
|
width=width))
|
|
for column in sorted(Column.columns.values()))
|
|
parser.exit(message=text + '\n')
|
|
|
|
class _HelpFormatsAction(argparse.Action):
|
|
'''Action for argument parser that displays all formats and exits.'''
|
|
# pylint: disable=redefined-builtin
|
|
def __init__(self,
|
|
option_strings,
|
|
dest=argparse.SUPPRESS,
|
|
default=argparse.SUPPRESS,
|
|
help='list all available formats with their definitions and exit'):
|
|
super(_HelpFormatsAction, self).__init__(
|
|
option_strings=option_strings,
|
|
dest=dest,
|
|
default=default,
|
|
nargs=0,
|
|
help=help)
|
|
|
|
def __call__(self, parser, namespace, values, option_string=None):
|
|
width = max(len(fmt) for fmt in formats)
|
|
text = 'Available formats:\n' + ''.join(
|
|
' {fmt:{width}s} {columns}\n'.format(
|
|
fmt=fmt, columns=','.join(formats[fmt]).upper(), width=width)
|
|
for fmt in sorted(formats))
|
|
parser.exit(message=text)
|
|
|
|
|
|
def get_parser():
|
|
'''Create :py:class:`argparse.ArgumentParser` suitable for
|
|
:program:`qvm-ls`.
|
|
'''
|
|
# parser creation is delayed to get all the columns that are scattered
|
|
# thorough the modules
|
|
|
|
wrapper = textwrap.TextWrapper(width=80, break_on_hyphens=False,
|
|
initial_indent=' ', subsequent_indent=' ')
|
|
|
|
parser = qubes.tools.QubesArgumentParser(
|
|
formatter_class=argparse.RawTextHelpFormatter,
|
|
description='List Qubes domains and their parametres.',
|
|
epilog='available formats (see --help-formats):\n{}\n\n'
|
|
'available columns (see --help-columns):\n{}'.format(
|
|
wrapper.fill(', '.join(sorted(formats.keys()))),
|
|
wrapper.fill(', '.join(sorted(sorted(Column.columns.keys()))))))
|
|
|
|
parser.add_argument('--help-columns', action=_HelpColumnsAction)
|
|
parser.add_argument('--help-formats', action=_HelpFormatsAction)
|
|
|
|
|
|
parser_formats = parser.add_mutually_exclusive_group()
|
|
|
|
parser_formats.add_argument('--format', '-o', metavar='FORMAT',
|
|
action='store', choices=formats.keys(), default='simple',
|
|
help='preset format')
|
|
|
|
parser_formats.add_argument('--fields', '-O', metavar='FIELD,...',
|
|
action='store',
|
|
help='user specified format (see available columns below)')
|
|
|
|
|
|
# parser.add_argument('--conf', '-c',
|
|
# action='store', metavar='CFGFILE',
|
|
# help='Qubes config file')
|
|
|
|
return parser
|
|
|
|
|
|
def main(args=None):
|
|
'''Main routine of :program:`qvm-ls`.
|
|
|
|
:param list args: Optional arguments to override those delivered from \
|
|
command line.
|
|
'''
|
|
|
|
parser = get_parser()
|
|
args = parser.parse_args(args)
|
|
|
|
if args.fields:
|
|
columns = [col.strip() for col in args.fields.split(',')]
|
|
for col in columns:
|
|
if col.upper() not in Column.columns:
|
|
parser.error('no such column: {!r}'.format(col))
|
|
else:
|
|
columns = formats[args.format]
|
|
|
|
table = Table(args.app, columns)
|
|
table.write_table(sys.stdout)
|
|
|
|
return True
|
|
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(not main())
|