80 lines
2.1 KiB
Python
80 lines
2.1 KiB
Python
#!/usr/bin/python2 -O
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'''
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Qubes OS
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'''
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__author__ = 'Invisible Things Lab'
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__license__ = 'GPLv2 or later'
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__version__ = 'R3'
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import qubes._pluginloader
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class QubesException(Exception):
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'''Exception that can be shown to the user'''
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pass
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class QubesVMMConnection(object):
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'''Connection to Virtual Machine Manager (libvirt)'''
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def __init__(self):
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self._libvirt_conn = None
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self._xs = None
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self._xc = None
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self._offline_mode = False
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@property
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def offline_mode(self):
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'''Check or enable offline mode (do not actually connect to vmm)'''
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return self._offline_mode
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@offline_mode.setter
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def offline_mode(self, value):
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if value and self._libvirt_conn is not None:
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raise QubesException("Cannot change offline mode while already connected")
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self._offline_mode = value
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def _libvirt_error_handler(self, ctx, error):
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pass
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def init_vmm_connection(self):
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'''Initialise connection
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This method is automatically called when getting'''
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if self._libvirt_conn is not None:
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# Already initialized
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return
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if self._offline_mode:
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# Do not initialize in offline mode
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raise QubesException("VMM operations disabled in offline mode")
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if 'xen.lowlevel.xs' in sys.modules:
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self._xs = xen.lowlevel.xs.xs()
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self._libvirt_conn = libvirt.open(defaults['libvirt_uri'])
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if self._libvirt_conn == None:
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raise QubesException("Failed connect to libvirt driver")
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libvirt.registerErrorHandler(self._libvirt_error_handler, None)
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atexit.register(self._libvirt_conn.close)
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@property
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def libvirt_conn(self):
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'''Connection to libvirt'''
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self.init_vmm_connection()
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return self._libvirt_conn
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@property
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def xs(self):
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'''Connection to Xen Store
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This property in available only when running on Xen.'''
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if 'xen.lowlevel.xs' not in sys.modules:
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return None
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self.init_vmm_connection()
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return self._xs
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if not dry_run:
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vmm = QubesVMMConnection()
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