# 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>
# Copyright (C) 2017 Marek Marczykowski-Górecki
# <marmarek@invisiblethingslab.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser 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 argparse
import collections.abc
import sys
import textwrap
import qubesadmin
import qubesadmin.spinner
import qubesadmin.tools
import qubesadmin.utils
import qubesadmin.vm
import qubesadmin.exc
#
# columns
#
[docs]
class Column(object):
'''A column in qvm-ls output characterised by its head and a way
to fetch a parameter describing the domain.
:param str head: Column head (usually uppercase).
:param str attr: Attribute, possibly complex (containing ``.``). This may \
also be a callable that gets as its only argument the domain.
:param str doc: Description of column (will be visible in --help-columns).
'''
#: collection of all columns
columns = {}
def __init__(self, head, attr=None, doc=None):
self.ls_head = head
self.__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
[docs]
def cell(self, vm, insertion=0):
'''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.
:param int insertion: Intending to shift the value to the right.
:returns: string to display
:rtype: str
'''
value = self.format(vm) or '-'
if insertion > 0 and self.ls_head == 'NAME':
value = '└─' + value
value = ' ' * (insertion-1) + value
return value
def __repr__(self):
return '{}(head={!r})'.format(self.__class__.__name__,
self.ls_head)
def __eq__(self, other):
return self.ls_head == other.ls_head
def __lt__(self, other):
return self.ls_head < other.ls_head
[docs]
class PropertyColumn(Column):
'''Column that displays value from property (:py:class:`property` or
:py:class:`qubes.property`) of domain.
:param name: Name of VM property.
'''
def __init__(self, name):
ls_head = name.replace('_', '-').upper()
super().__init__(head=ls_head, attr=name)
def __repr__(self):
return '{}(head={!r}'.format(
self.__class__.__name__,
self.ls_head)
[docs]
def process_vm(vm):
'''Process VM object to find all listable properties.
:param qubesmgmt.vm.QubesVM vm: VM object.
'''
for prop_name in vm.property_list():
PropertyColumn(prop_name)
[docs]
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
[docs]
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
[docs]
class FlagsColumn(Column):
'''Some fancy flags that describe general status of the domain.'''
def __init__(self):
super().__init__(head='FLAGS', doc=self.__class__.__doc__)
[docs]
@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.
'''
type_codes = {
'AdminVM': '0',
'TemplateVM': 't',
'AppVM': 'a',
'StandaloneVM': 's',
'DispVM': 'd',
}
ret = type_codes.get(vm.klass, None)
if ret == '0':
return ret
if ret is not None:
if getattr(vm, 'virt_mode', 'pv') == 'hvm':
return ret.upper()
return ret
[docs]
@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 '?'
if 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.'''
[docs]
@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)]
[docs]
def calc_size(vm, volume_name):
''' Calculates the volume size in MB '''
try:
return vm.volumes[volume_name].size // 1024 // 1024
except KeyError:
return 0
[docs]
def calc_usage(vm, volume_name):
''' Calculates the volume usage in MB '''
try:
return vm.volumes[volume_name].usage // 1024 // 1024
except KeyError:
return 0
[docs]
def calc_used(vm, volume_name):
''' Calculates the volume usage in percent '''
size = calc_size(vm, volume_name)
if size == 0:
return 0
usage = calc_usage(vm, volume_name)
return '{}%'.format(usage * 100 // size)
# todo maxmem
Column('STATE',
attr=(lambda vm: vm.get_power_state()),
doc='Current power state.')
Column('CLASS',
attr=(lambda vm: vm.klass),
doc='Class of the qube.')
Column('GATEWAY',
attr='netvm.gateway',
doc='Network gateway.')
Column('MEMORY',
attr=(lambda vm: vm.get_mem() // 1024 if vm.is_running() else None),
doc='Memory currently used by VM')
Column('DISK',
attr=(lambda vm: vm.get_disk_utilization() // 1024 // 1024),
doc='Total disk utilisation.')
Column('PRIV-CURR',
attr=(lambda vm: calc_usage(vm, 'private')),
doc='Disk utilisation by private image (/home, /usr/local).')
Column('PRIV-MAX',
attr=(lambda vm: calc_size(vm, 'private')),
doc='Maximum available space for private image.')
Column('PRIV-USED',
attr=(lambda vm: calc_used(vm, 'private')),
doc='Disk utilisation by private image as a percentage of available space.')
Column('ROOT-CURR',
attr=(lambda vm: calc_usage(vm, 'root')),
doc='Disk utilisation by root image (/usr, /lib, /etc, ...).')
Column('ROOT-MAX',
attr=(lambda vm: calc_size(vm, 'root')),
doc='Maximum available space for root image.')
Column('ROOT-USED',
attr=(lambda vm: calc_used(vm, 'root')),
doc='Disk utilisation by root image as a percentage of available space.')
FlagsColumn()
[docs]
class Table(object):
'''Table that is displayed to the user.
:param domains: Domains to include in the table.
:param list colnames: Names of the columns (need not to be uppercase).
'''
def __init__(self, domains, colnames, spinner, raw_data=False,
tree_sorted=False):
self.domains = domains
self.columns = tuple(Column.columns[col.upper().replace('_', '-')]
for col in colnames)
self.spinner = spinner
self.raw_data = raw_data
self.tree_sorted = tree_sorted
[docs]
def get_head(self):
'''Get table head data (all column heads).'''
return [col.ls_head for col in self.columns]
[docs]
def get_row(self, vm, insertion=0):
'''Get single table row data (all columns for one domain).'''
ret = []
for col in self.columns:
if self.tree_sorted and col.ls_head == 'NAME':
ret.append(col.cell(vm, insertion))
else:
ret.append(col.cell(vm))
self.spinner.update()
return ret
[docs]
def tree_append_child(self, parent, level):
'''Concatenate the network children of the vm to a list.
:param qubes.vm.qubesvm.QubesVM: Parent vm of the children VMs
'''
childs = []
for child in parent.connected_vms:
if child.provides_network and child in self.domains:
childs.append((level, child))
childs += self.tree_append_child(child, level+1)
elif child in self.domains:
childs.append((level, child))
return childs
[docs]
def sort_to_tree(self, domains):
'''Sort the domains as a network tree. It returns a list of sets. Each
tuple stores the insertion of the cell name and the vm object.
:param list() domains: The domains which will be sorted
:return list(tuple()) tree: returns a list of tuple(insertion, vm)
'''
tree = []
# We need a copy of domains, because domains.remove() is not allowed
# while iterating over it. Besides, the domains should be sorted anyway.
sorted_doms = sorted(domains)
for dom in sorted_doms:
try:
if dom.netvm is None and not dom.provides_network:
tree.append((0, dom))
domains.remove(dom)
# dom0 and eventually others have no netvm attribute
except (qubesadmin.exc.QubesNoSuchPropertyError, AttributeError):
tree.append((0, dom))
domains.remove(dom)
for dom in sorted(domains):
if dom.netvm is None and dom.provides_network:
tree.append((0, dom))
domains.remove(dom)
tree += self.tree_append_child(dom, 1)
return tree
[docs]
def write_table(self, stream=sys.stdout):
'''Write whole table to file-like object.
:param file stream: Stream to write the table to.
'''
table_data = []
if not self.raw_data:
self.spinner.show('please wait...')
table_data.append(self.get_head())
self.spinner.update()
if self.tree_sorted:
#FIXME: handle qubesadmin.exc.QubesVMNotFoundError
# (see QubesOS/qubes-issues#5105)
insertion_vm_list = self.sort_to_tree(self.domains)
for insertion, vm in insertion_vm_list:
table_data.append(self.get_row(vm, insertion))
else:
for vm in sorted(self.domains):
try:
table_data.append(self.get_row(vm))
except qubesadmin.exc.QubesVMNotFoundError:
continue
self.spinner.hide()
qubesadmin.tools.print_table(table_data, stream=stream)
else:
for vm in sorted(self.domains):
try:
stream.write('|'.join(self.get_row(vm)) + '\n')
except qubesadmin.exc.QubesVMNotFoundError:
continue
#: Available formats. Feel free to plug your own one.
formats = {
'simple': ('name', 'state', 'class', 'label', 'template', 'netvm'),
'network': ('name', 'state', 'netvm', 'ip', 'ipback', 'gateway'),
'kernel': ('name', 'state', 'class', 'template', 'kernel', 'kernelopts'),
'full': ('name', 'state', 'class', 'label', 'qid', 'xid', 'uuid'),
# 'perf': ('name', 'state', 'cpu', 'memory'),
'disk': ('name', 'state', '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().__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()))
text += '\n\nAdditionally any VM property may be used as a column, ' \
'see qvm-prefs --help-properties for available values'
print(text + '\n')
sys.exit(0)
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().__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))
print(text)
sys.exit(0)
# common VM power states for easy command-line filtering
DOMAIN_POWER_STATES = ['running', 'paused', 'halted']
[docs]
def matches_power_states(domain, **states):
'''Filter domains by their power state'''
# if all values are False (default) => return match on every VM
if not states or set(states.values()) == {False}:
return True
# otherwise => only VMs matching True states
requested_states = [state for state, active in states.items() if active]
return domain.get_power_state().lower() in requested_states
[docs]
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 = qubesadmin.tools.QubesArgumentParser(
vmname_nargs=argparse.ZERO_OR_MORE,
formatter_class=argparse.RawTextHelpFormatter,
description='List Qubes domains and their parameters.',
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('--tags', nargs='+', metavar='TAG',
help='show only VMs having specific tag(s)')
for pwrstate in DOMAIN_POWER_STATES:
parser.add_argument('--{}'.format(pwrstate), action='store_true',
help='show {} VMs'.format(pwrstate))
parser.add_argument('--raw-data', action='store_true',
help='Display specify data of specified VMs. Intended for '
'bash-parsing.')
parser.add_argument('--tree', '-t',
action='store_const', const='tree',
help='sort domain list as network tree')
parser.add_argument('--spinner',
action='store_true', dest='spinner',
help='reenable spinner')
parser.add_argument('--no-spinner',
action='store_false', dest='spinner',
help='disable spinner')
# shortcuts, compatibility with Qubes 3.2
parser.add_argument('--raw-list', action='store_true',
help='Same as --raw-data --fields=name')
parser.add_argument('--disk', '-d',
action='store_const', dest='format', const='disk',
help='Same as --format=disk')
parser.add_argument('--network', '-n',
action='store_const', dest='format', const='network',
help='Same as --format=network')
parser.add_argument('--kernel', '-k',
action='store_const', dest='format', const='kernel',
help='Same as --format=kernel')
parser.set_defaults(spinner=True)
# parser.add_argument('--conf', '-c',
# action='store', metavar='CFGFILE',
# help='Qubes config file')
return parser
[docs]
def main(args=None, app=None):
'''Main routine of :program:`qvm-ls`.
:param list args: Optional arguments to override those delivered from \
command line.
:param app: Operate on given app object instead of instantiating new one.
'''
parser = get_parser()
try:
args = parser.parse_args(args, app=app)
except qubesadmin.exc.QubesException as e:
parser.print_error(str(e))
return 1
# fetch all the properties with one Admin API call, instead of issuing
# one call per property
args.app.cache_enabled = True
if args.raw_list:
args.raw_data = True
args.fields = 'name'
if args.fields:
columns = [col.strip() for col in args.fields.split(',')]
else:
columns = formats[args.format]
# assume unknown columns are VM properties
for col in columns:
if col.upper() not in Column.columns:
PropertyColumn(col.lower())
if args.spinner and not args.raw_data:
# we need Enterprise Edition™, since it's the only one that detects TTY
# and uses dots if we are redirected somewhere else
spinner = qubesadmin.spinner.QubesSpinnerEnterpriseEdition(sys.stderr)
else:
spinner = qubesadmin.spinner.DummySpinner(sys.stderr)
if args.domains:
domains = args.domains
else:
domains = args.app.domains
if args.all_domains:
# Normally, --all means "all domains except for AdminVM".
# However, in the case of qvm-ls it does not make sense to exclude
# AdminVMs, so we override the list from parser.
domains = [
vm for vm in args.app.domains if vm.name not in args.exclude
]
if args.tags:
# filter only VMs having at least one of the specified tags
domains = [dom for dom in domains
if set(dom.tags).intersection(set(args.tags))]
pwrstates = {state: getattr(args, state) for state in DOMAIN_POWER_STATES}
domains = [d for d in domains
if matches_power_states(d, **pwrstates)]
table = Table(domains, columns, spinner, args.raw_data, args.tree)
table.write_table(sys.stdout)
return 0
if __name__ == '__main__':
sys.exit(main())