766 lines
27 KiB
Python
Executable File
766 lines
27 KiB
Python
Executable File
#!/usr/bin/python2
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# -*- coding: utf-8 -*-
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2010 Joanna Rutkowska <joanna@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (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
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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import sys
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import os
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import os.path
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import lxml.etree
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import xml.parsers.expat
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import fcntl
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import time
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import warnings
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import tempfile
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import grp
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# Do not use XenAPI or create/read any VM files
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# This is for testing only!
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dry_run = False
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#dry_run = True
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if not dry_run:
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import xen.lowlevel.xc
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import xen.lowlevel.xl
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import xen.lowlevel.xs
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qubes_base_dir = "/var/lib/qubes"
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system_path = {
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'qubes_guid_path': '/usr/bin/qubes-guid',
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'qrexec_daemon_path': '/usr/lib/qubes/qrexec-daemon',
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'qrexec_client_path': '/usr/lib/qubes/qrexec-client',
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'qubes_base_dir': qubes_base_dir,
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'qubes_appvms_dir': qubes_base_dir + '/appvms',
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'qubes_templates_dir': qubes_base_dir + '/vm-templates',
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'qubes_servicevms_dir': qubes_base_dir + '/servicevms',
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'qubes_store_filename': qubes_base_dir + '/qubes.xml',
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'qubes_kernels_base_dir': qubes_base_dir + '/vm-kernels',
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'qubes_icon_dir': '/usr/share/qubes/icons',
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'config_template_pv': '/usr/share/qubes/vm-template.conf',
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'qubes_pciback_cmd': '/usr/lib/qubes/unbind-pci-device.sh',
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'prepare_volatile_img_cmd': '/usr/lib/qubes/prepare-volatile-img.sh',
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'monitor_layout_notify_cmd': '/usr/bin/qubes-monitor-layout-notify',
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}
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vm_files = {
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'root_img': 'root.img',
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'rootcow_img': 'root-cow.img',
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'volatile_img': 'volatile.img',
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'clean_volatile_img': 'clean-volatile.img.tar',
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'private_img': 'private.img',
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'kernels_subdir': 'kernels',
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'firewall_conf': 'firewall.xml',
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'whitelisted_appmenus': 'whitelisted-appmenus.list',
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'updates_stat_file': 'updates.stat',
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}
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defaults = {
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'memory': 400,
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'kernelopts': "nopat",
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'kernelopts_pcidevs': "nopat iommu=soft swiotlb=4096",
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'dom0_update_check_interval': 6*3600,
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# how long (in sec) to wait for VMs to shutdown,
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# before killing them (when used qvm-run with --wait option),
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'shutdown_counter_max': 60,
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'vm_default_netmask': "255.255.255.0",
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# Set later
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'appvm_label': None,
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'template_label': None,
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'servicevm_label': None,
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}
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qubes_max_qid = 254
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qubes_max_netid = 254
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class QubesException (Exception):
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pass
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if not dry_run:
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xc = xen.lowlevel.xc.xc()
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xs = xen.lowlevel.xs.xs()
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xl_ctx = xen.lowlevel.xl.ctx()
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class QubesHost(object):
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def __init__(self):
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self.physinfo = xc.physinfo()
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self.xen_total_mem = long(self.physinfo['total_memory'])
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self.xen_no_cpus = self.physinfo['nr_cpus']
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# print "QubesHost: total_mem = {0}B".format (self.xen_total_mem)
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# print "QubesHost: free_mem = {0}".format (self.get_free_xen_memory())
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# print "QubesHost: total_cpus = {0}".format (self.xen_no_cpus)
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@property
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def memory_total(self):
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return self.xen_total_mem
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@property
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def no_cpus(self):
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return self.xen_no_cpus
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def get_free_xen_memory(self):
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ret = self.physinfo['free_memory']
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return long(ret)
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def measure_cpu_usage(self, previous=None, previous_time = None,
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wait_time=1):
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"""measure cpu usage for all domains at once"""
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if previous is None:
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previous_time = time.time()
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previous = {}
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info = xc.domain_getinfo(0, qubes_max_qid)
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for vm in info:
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previous[vm['domid']] = {}
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previous[vm['domid']]['cpu_time'] = (
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vm['cpu_time'] / vm['online_vcpus'])
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previous[vm['domid']]['cpu_usage'] = 0
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time.sleep(wait_time)
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current_time = time.time()
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current = {}
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info = xc.domain_getinfo(0, qubes_max_qid)
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for vm in info:
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current[vm['domid']] = {}
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current[vm['domid']]['cpu_time'] = (
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vm['cpu_time'] / max(vm['online_vcpus'], 1))
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if vm['domid'] in previous.keys():
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current[vm['domid']]['cpu_usage'] = (
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float(current[vm['domid']]['cpu_time'] -
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previous[vm['domid']]['cpu_time']) /
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long(1000**3) / (current_time-previous_time) * 100)
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if current[vm['domid']]['cpu_usage'] < 0:
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# VM has been rebooted
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current[vm['domid']]['cpu_usage'] = 0
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else:
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current[vm['domid']]['cpu_usage'] = 0
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return (current_time, current)
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class QubesVmLabel(object):
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def __init__(self, index, color, name, icon = None):
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self.name = name
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self.index = index
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self.color = color
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self.icon = icon if icon is not None else name
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self.icon_path = os.path.join(
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system_path['qubes_icon_dir'], self.icon) + ".png"
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# Globally defined lables
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QubesVmLabels = {
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"red": QubesVmLabel(1, "0xcc0000", "red" ),
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"orange": QubesVmLabel(2, "0xf57900", "orange" ),
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"yellow": QubesVmLabel(3, "0xedd400", "yellow" ),
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"green": QubesVmLabel(4, "0x73d216", "green" ),
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"gray": QubesVmLabel(5, "0x555753", "gray" ),
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"blue": QubesVmLabel(6, "0x3465a4", "blue" ),
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"purple": QubesVmLabel(7, "0x75507b", "purple" ),
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"black": QubesVmLabel(8, "0x000000", "black" ),
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}
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QubesDispVmLabels = {
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"red": QubesVmLabel(1, "0xcc0000", "red", icon="dispvm-red" ),
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"orange": QubesVmLabel(2, "0xf57900", "orange", icon="dispvm-orange"),
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"yellow": QubesVmLabel(3, "0xedd400", "yellow", icon="dispvm-yellow"),
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"green": QubesVmLabel(4, "0x73d216", "green", icon="dispvm-green" ),
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"gray": QubesVmLabel(5, "0x555753", "gray", icon="dispvm-gray" ),
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"blue": QubesVmLabel(6, "0x3465a4", "blue", icon="dispvm-blue" ),
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"purple": QubesVmLabel(7, "0x75507b", "purple", icon="dispvm-purple"),
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"black": QubesVmLabel(8, "0x000000", "black", icon="dispvm-black" ),
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}
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defaults["appvm_label"] = QubesVmLabels["red"]
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defaults["template_label"] = QubesVmLabels["black"]
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defaults["servicevm_label"] = QubesVmLabels["red"]
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QubesVmClasses = {}
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def register_qubes_vm_class(vm_class):
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QubesVmClasses[vm_class.__name__] = vm_class
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# register class as local for this module - to make it easy to import from
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# other modules
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setattr(sys.modules[__name__], vm_class.__name__, vm_class)
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class QubesVmCollection(dict):
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"""
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A collection of Qubes VMs indexed by Qubes id (qid)
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"""
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def __init__(self, store_filename=system_path["qubes_store_filename"]):
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super(QubesVmCollection, self).__init__()
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self.default_netvm_qid = None
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self.default_fw_netvm_qid = None
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self.default_template_qid = None
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self.default_kernel = None
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self.updatevm_qid = None
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self.qubes_store_filename = store_filename
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self.clockvm_qid = None
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self.qubes_store_file = None
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def values(self):
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for qid in self.keys():
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yield self[qid]
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def items(self):
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for qid in self.keys():
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yield (qid, self[qid])
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def __iter__(self):
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for qid in sorted(super(QubesVmCollection, self).keys()):
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yield qid
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keys = __iter__
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def __setitem__(self, key, value):
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if key not in self:
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return super(QubesVmCollection, self).__setitem__(key, value)
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else:
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assert False, "Attempt to add VM with qid that already exists in the collection!"
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def add_new_vm(self, vm_type, **kwargs):
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if vm_type not in QubesVmClasses.keys():
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raise ValueError("Unknown VM type: %s" % vm_type)
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qid = self.get_new_unused_qid()
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vm_cls = QubesVmClasses[vm_type]
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if 'template' in kwargs:
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if not vm_cls.is_template_compatible(kwargs['template']):
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raise QubesException("Template not compatible with selected "
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"VM type")
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vm = vm_cls(qid=qid, collection=self, **kwargs)
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if not self.verify_new_vm(vm):
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raise QubesException("Wrong VM description!")
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self[vm.qid] = vm
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# make first created NetVM the default one
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if self.default_fw_netvm_qid is None and vm.is_netvm():
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self.set_default_fw_netvm(vm)
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if self.default_netvm_qid is None and vm.is_proxyvm():
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self.set_default_netvm(vm)
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# make first created TemplateVM the default one
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if self.default_template_qid is None and vm.is_template():
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self.set_default_template(vm)
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# make first created ProxyVM the UpdateVM
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if self.updatevm_qid is None and vm.is_proxyvm():
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self.set_updatevm_vm(vm)
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# by default ClockVM is the first NetVM
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if self.clockvm_qid is None and vm.is_netvm():
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self.set_clockvm_vm(vm)
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return vm
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def add_new_appvm(self, name, template,
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dir_path = None, conf_file = None,
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private_img = None,
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label = None):
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warnings.warn("Call to deprecated function, use add_new_vm instead",
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DeprecationWarning, stacklevel=2)
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return self.add_new_vm("QubesAppVm", name=name, template=template,
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dir_path=dir_path, conf_file=conf_file,
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private_img=private_img,
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netvm = self.get_default_netvm(),
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kernel = self.get_default_kernel(),
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uses_default_kernel = True,
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label=label)
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def add_new_hvm(self, name, label = None):
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warnings.warn("Call to deprecated function, use add_new_vm instead",
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DeprecationWarning, stacklevel=2)
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return self.add_new_vm("QubesHVm", name=name, label=label)
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def add_new_disposablevm(self, name, template, dispid,
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label = None, netvm = None):
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warnings.warn("Call to deprecated function, use add_new_vm instead",
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DeprecationWarning, stacklevel=2)
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return self.add_new_vm("QubesDisposableVm", name=name, template=template,
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netvm = netvm,
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label=label, dispid=dispid)
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def add_new_templatevm(self, name,
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dir_path = None, conf_file = None,
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root_img = None, private_img = None,
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installed_by_rpm = True):
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warnings.warn("Call to deprecated function, use add_new_vm instead",
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DeprecationWarning, stacklevel=2)
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return self.add_new_vm("QubesTemplateVm", name=name,
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dir_path=dir_path, conf_file=conf_file,
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root_img=root_img, private_img=private_img,
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installed_by_rpm=installed_by_rpm,
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netvm = self.get_default_netvm(),
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kernel = self.get_default_kernel(),
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uses_default_kernel = True)
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def add_new_netvm(self, name, template,
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dir_path = None, conf_file = None,
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private_img = None, installed_by_rpm = False,
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label = None):
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warnings.warn("Call to deprecated function, use add_new_vm instead",
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DeprecationWarning, stacklevel=2)
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return self.add_new_vm("QubesNetVm", name=name, template=template,
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label=label,
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private_img=private_img, installed_by_rpm=installed_by_rpm,
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uses_default_kernel = True,
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dir_path=dir_path, conf_file=conf_file)
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def add_new_proxyvm(self, name, template,
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dir_path = None, conf_file = None,
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private_img = None, installed_by_rpm = False,
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label = None):
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warnings.warn("Call to deprecated function, use add_new_vm instead",
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DeprecationWarning, stacklevel=2)
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return self.add_new_vm("QubesProxyVm", name=name, template=template,
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label=label,
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private_img=private_img, installed_by_rpm=installed_by_rpm,
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dir_path=dir_path, conf_file=conf_file,
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uses_default_kernel = True,
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netvm = self.get_default_fw_netvm())
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def set_default_template(self, vm):
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if vm is None:
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self.default_template_qid = None
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else:
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assert vm.is_template(), "VM {0} is not a TemplateVM!".format(vm.name)
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self.default_template_qid = vm.qid
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def get_default_template(self):
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if self.default_template_qid is None:
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return None
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else:
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return self[self.default_template_qid]
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def set_default_netvm(self, vm):
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if vm is None:
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self.default_netvm_qid = None
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else:
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assert vm.is_netvm(), "VM {0} does not provide network!".format(vm.name)
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self.default_netvm_qid = vm.qid
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def get_default_netvm(self):
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if self.default_netvm_qid is None:
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return None
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else:
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return self[self.default_netvm_qid]
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def set_default_kernel(self, kernel):
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assert os.path.exists(
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os.path.join(system_path["qubes_kernels_base_dir"], kernel)), \
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"Kerel {0} not installed!".format(kernel)
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self.default_kernel = kernel
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def get_default_kernel(self):
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return self.default_kernel
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def set_default_fw_netvm(self, vm):
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if vm is None:
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self.default_fw_netvm_qid = None
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else:
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assert vm.is_netvm(), "VM {0} does not provide network!".format(vm.name)
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self.default_fw_netvm_qid = vm.qid
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def get_default_fw_netvm(self):
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if self.default_fw_netvm_qid is None:
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return None
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else:
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return self[self.default_fw_netvm_qid]
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def set_updatevm_vm(self, vm):
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if vm is None:
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self.updatevm_qid = None
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else:
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self.updatevm_qid = vm.qid
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def get_updatevm_vm(self):
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if self.updatevm_qid is None:
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return None
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else:
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return self[self.updatevm_qid]
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def set_clockvm_vm(self, vm):
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if vm is None:
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self.clockvm_qid = None
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else:
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self.clockvm_qid = vm.qid
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def get_clockvm_vm(self):
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if self.clockvm_qid is None:
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return None
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else:
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return self[self.clockvm_qid]
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def get_vm_by_name(self, name):
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for vm in self.values():
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if (vm.name == name):
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return vm
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return None
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def get_qid_by_name(self, name):
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vm = self.get_vm_by_name(name)
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return vm.qid if vm is not None else None
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def get_vms_based_on(self, template_qid):
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vms = set([vm for vm in self.values()
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if (vm.template and vm.template.qid == template_qid)])
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return vms
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def get_vms_connected_to(self, netvm_qid):
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new_vms = [ netvm_qid ]
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dependend_vms_qid = []
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# Dependency resolving only makes sense on NetVM (or derivative)
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if not self[netvm_qid].is_netvm():
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return set([])
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while len(new_vms) > 0:
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cur_vm = new_vms.pop()
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for vm in self[cur_vm].connected_vms.values():
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if vm.qid not in dependend_vms_qid:
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dependend_vms_qid.append(vm.qid)
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if vm.is_netvm():
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new_vms.append(vm.qid)
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vms = [vm for vm in self.values() if vm.qid in dependend_vms_qid]
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return vms
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def verify_new_vm(self, new_vm):
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# Verify that qid is unique
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for vm in self.values():
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if vm.qid == new_vm.qid:
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print >> sys.stderr, "ERROR: The qid={0} is already used by VM '{1}'!".\
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format(vm.qid, vm.name)
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return False
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# Verify that name is unique
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|
for vm in self.values():
|
|
if vm.name == new_vm.name:
|
|
print >> sys.stderr, \
|
|
"ERROR: The name={0} is already used by other VM with qid='{1}'!".\
|
|
format(vm.name, vm.qid)
|
|
return False
|
|
|
|
return True
|
|
|
|
def get_new_unused_qid(self):
|
|
used_ids = set([vm.qid for vm in self.values()])
|
|
for id in range (1, qubes_max_qid):
|
|
if id not in used_ids:
|
|
return id
|
|
raise LookupError ("Cannot find unused qid!")
|
|
|
|
def get_new_unused_netid(self):
|
|
used_ids = set([vm.netid for vm in self.values() if vm.is_netvm()])
|
|
for id in range (1, qubes_max_netid):
|
|
if id not in used_ids:
|
|
return id
|
|
raise LookupError ("Cannot find unused netid!")
|
|
|
|
|
|
def check_if_storage_exists(self):
|
|
try:
|
|
f = open (self.qubes_store_filename, 'r')
|
|
except IOError:
|
|
return False
|
|
f.close()
|
|
return True
|
|
|
|
def create_empty_storage(self):
|
|
self.qubes_store_file = open (self.qubes_store_filename, 'w')
|
|
self.clear()
|
|
self.save()
|
|
|
|
def lock_db_for_reading(self):
|
|
self.qubes_store_file = open (self.qubes_store_filename, 'r')
|
|
fcntl.lockf (self.qubes_store_file, fcntl.LOCK_SH)
|
|
|
|
def lock_db_for_writing(self):
|
|
self.qubes_store_file = open (self.qubes_store_filename, 'r+')
|
|
fcntl.lockf (self.qubes_store_file, fcntl.LOCK_EX)
|
|
|
|
def unlock_db(self):
|
|
# intentionally do not call explicit unlock to not unlock the file
|
|
# before all buffers are flushed
|
|
self.qubes_store_file.close()
|
|
|
|
def save(self):
|
|
root = lxml.etree.Element(
|
|
"QubesVmCollection",
|
|
|
|
default_template=str(self.default_template_qid) \
|
|
if self.default_template_qid is not None else "None",
|
|
|
|
default_netvm=str(self.default_netvm_qid) \
|
|
if self.default_netvm_qid is not None else "None",
|
|
|
|
default_fw_netvm=str(self.default_fw_netvm_qid) \
|
|
if self.default_fw_netvm_qid is not None else "None",
|
|
|
|
updatevm=str(self.updatevm_qid) \
|
|
if self.updatevm_qid is not None else "None",
|
|
|
|
clockvm=str(self.clockvm_qid) \
|
|
if self.clockvm_qid is not None else "None",
|
|
|
|
default_kernel=str(self.default_kernel) \
|
|
if self.default_kernel is not None else "None",
|
|
)
|
|
|
|
for vm in self.values():
|
|
element = vm.create_xml_element()
|
|
if element is not None:
|
|
root.append(element)
|
|
tree = lxml.etree.ElementTree(root)
|
|
|
|
try:
|
|
|
|
new_store_file = tempfile.NamedTemporaryFile(prefix=self.qubes_store_filename, delete=False)
|
|
# XXX: do not get lock on the new file, as in all use cases
|
|
# unlock_db() is the next operation after save()
|
|
tree.write(new_store_file, encoding="UTF-8", pretty_print=True)
|
|
new_store_file.flush()
|
|
os.chmod(new_store_file.name, 0660)
|
|
os.chown(new_store_file.name, -1, grp.getgrnam('qubes').gr_gid)
|
|
os.rename(new_store_file.name, self.qubes_store_filename)
|
|
self.qubes_store_file.close()
|
|
self.qubes_store_file = new_store_file
|
|
except EnvironmentError as err:
|
|
print("{0}: export error: {1}".format(
|
|
os.path.basename(sys.argv[0]), err))
|
|
return False
|
|
return True
|
|
|
|
def set_netvm_dependency(self, element):
|
|
kwargs = {}
|
|
attr_list = ("qid", "uses_default_netvm", "netvm_qid")
|
|
|
|
for attribute in attr_list:
|
|
kwargs[attribute] = element.get(attribute)
|
|
|
|
vm = self[int(kwargs["qid"])]
|
|
|
|
if "uses_default_netvm" not in kwargs:
|
|
vm.uses_default_netvm = True
|
|
else:
|
|
vm.uses_default_netvm = (
|
|
True if kwargs["uses_default_netvm"] == "True" else False)
|
|
if vm.uses_default_netvm is True:
|
|
if vm.is_proxyvm():
|
|
netvm = self.get_default_fw_netvm()
|
|
else:
|
|
netvm = self.get_default_netvm()
|
|
kwargs.pop("netvm_qid")
|
|
else:
|
|
if kwargs["netvm_qid"] == "none" or kwargs["netvm_qid"] is None:
|
|
netvm = None
|
|
kwargs.pop("netvm_qid")
|
|
else:
|
|
netvm_qid = int(kwargs.pop("netvm_qid"))
|
|
if netvm_qid not in self:
|
|
netvm = None
|
|
else:
|
|
netvm = self[netvm_qid]
|
|
|
|
# directly set internal attr to not call setters...
|
|
vm._netvm = netvm
|
|
if netvm:
|
|
netvm.connected_vms[vm.qid] = vm
|
|
|
|
|
|
def load_globals(self, element):
|
|
default_template = element.get("default_template")
|
|
self.default_template_qid = int(default_template) \
|
|
if default_template.lower() != "none" else None
|
|
|
|
default_netvm = element.get("default_netvm")
|
|
if default_netvm is not None:
|
|
self.default_netvm_qid = int(default_netvm) \
|
|
if default_netvm != "None" else None
|
|
#assert self.default_netvm_qid is not None
|
|
|
|
default_fw_netvm = element.get("default_fw_netvm")
|
|
if default_fw_netvm is not None:
|
|
self.default_fw_netvm_qid = int(default_fw_netvm) \
|
|
if default_fw_netvm != "None" else None
|
|
#assert self.default_netvm_qid is not None
|
|
|
|
updatevm = element.get("updatevm")
|
|
if updatevm is not None:
|
|
self.updatevm_qid = int(updatevm) \
|
|
if updatevm != "None" else None
|
|
#assert self.default_netvm_qid is not None
|
|
|
|
clockvm = element.get("clockvm")
|
|
if clockvm is not None:
|
|
self.clockvm_qid = int(clockvm) \
|
|
if clockvm != "None" else None
|
|
|
|
self.default_kernel = element.get("default_kernel")
|
|
|
|
|
|
def load(self):
|
|
self.clear()
|
|
|
|
try:
|
|
tree = lxml.etree.parse(self.qubes_store_file)
|
|
except (EnvironmentError,
|
|
xml.parsers.expat.ExpatError) as err:
|
|
print("{0}: import error: {1}".format(
|
|
os.path.basename(sys.argv[0]), err))
|
|
return False
|
|
|
|
self.load_globals(tree.getroot())
|
|
|
|
for (vm_class_name, vm_class) in sorted(QubesVmClasses.items(),
|
|
key=lambda _x: _x[1].load_order):
|
|
vms_of_class = tree.findall(vm_class_name)
|
|
# first non-template based, then template based
|
|
sorted_vms_of_class = sorted(vms_of_class, key= \
|
|
lambda x: str(x.get('template_qid')).lower() != "none")
|
|
for element in sorted_vms_of_class:
|
|
try:
|
|
vm = vm_class(xml_element=element, collection=self)
|
|
self[vm.qid] = vm
|
|
except (ValueError, LookupError) as err:
|
|
print("{0}: import error ({1}): {2}".format(
|
|
os.path.basename(sys.argv[0]), vm_class_name, err))
|
|
raise
|
|
return False
|
|
|
|
# After importing all VMs, set netvm references, in the same order
|
|
for (vm_class_name, vm_class) in sorted(QubesVmClasses.items(),
|
|
key=lambda _x: _x[1].load_order):
|
|
for element in tree.findall(vm_class_name):
|
|
try:
|
|
self.set_netvm_dependency(element)
|
|
except (ValueError, LookupError) as err:
|
|
print("{0}: import error2 ({}): {}".format(
|
|
os.path.basename(sys.argv[0]), vm_class_name, err))
|
|
return False
|
|
|
|
# if there was no clockvm entry in qubes.xml, try to determine default:
|
|
# root of default NetVM chain
|
|
if tree.getroot().get("clockvm") is None:
|
|
if self.default_netvm_qid is not None:
|
|
clockvm = self[self.default_netvm_qid]
|
|
# Find root of netvm chain
|
|
while clockvm.netvm is not None:
|
|
clockvm = clockvm.netvm
|
|
|
|
self.clockvm_qid = clockvm.qid
|
|
|
|
# Disable ntpd in ClockVM - to not conflict with ntpdate (both are
|
|
# using 123/udp port)
|
|
if self.clockvm_qid is not None:
|
|
self[self.clockvm_qid].services['ntpd'] = False
|
|
|
|
# Add dom0 if wasn't present in qubes.xml
|
|
if not 0 in self.keys():
|
|
dom0vm = QubesAdminVm (collection=self)
|
|
self[dom0vm.qid] = dom0vm
|
|
|
|
return True
|
|
|
|
def pop(self, qid):
|
|
if self.default_netvm_qid == qid:
|
|
self.default_netvm_qid = None
|
|
if self.default_fw_netvm_qid == qid:
|
|
self.default_fw_netvm_qid = None
|
|
if self.clockvm_qid == qid:
|
|
self.clockvm_qid = None
|
|
if self.updatevm_qid == qid:
|
|
self.updatevm_qid = None
|
|
if self.default_template_qid == qid:
|
|
self.default_template_qid = None
|
|
|
|
return super(QubesVmCollection, self).pop(qid)
|
|
|
|
class QubesDaemonPidfile(object):
|
|
def __init__(self, name):
|
|
self.name = name
|
|
self.path = "/var/run/qubes/" + name + ".pid"
|
|
|
|
def create_pidfile(self):
|
|
f = open (self.path, 'w')
|
|
f.write(str(os.getpid()))
|
|
f.close()
|
|
|
|
def pidfile_exists(self):
|
|
return os.path.exists(self.path)
|
|
|
|
def read_pid(self):
|
|
f = open (self.path)
|
|
pid = f.read ().strip()
|
|
f.close()
|
|
return int(pid)
|
|
|
|
def pidfile_is_stale(self):
|
|
if not self.pidfile_exists():
|
|
return False
|
|
|
|
# check if the pid file is valid...
|
|
proc_path = "/proc/" + str(self.read_pid()) + "/cmdline"
|
|
if not os.path.exists (proc_path):
|
|
print >> sys.stderr, \
|
|
"Path {0} doesn't exist, assuming stale pidfile.".\
|
|
format(proc_path)
|
|
return True
|
|
|
|
return False # It's a good pidfile
|
|
|
|
def remove_pidfile(self):
|
|
os.remove (self.path)
|
|
|
|
def __enter__ (self):
|
|
# assumes the pidfile doesn't exist -- you should ensure it before opening the context
|
|
self.create_pidfile()
|
|
|
|
def __exit__ (self, exc_type, exc_val, exc_tb):
|
|
self.remove_pidfile()
|
|
return False
|
|
|
|
modules_dir = os.path.join(os.path.dirname(__file__), 'modules')
|
|
for module_file in sorted(os.listdir(modules_dir)):
|
|
if not module_file.endswith(".py") or module_file == "__init__.py":
|
|
continue
|
|
__import__('qubes.modules.%s' % module_file[:-3])
|
|
|
|
# vim:sw=4:et:
|