Current File : //lib/python2.7/site-packages/salt/beacons/glxinfo.py
# -*- coding: utf-8 -*-
'''
Beacon to emit when a display is available to a linux machine
.. versionadded:: 2016.3.0
'''
# Import Python libs
from __future__ import absolute_import, unicode_literals
import logging
# Salt libs
import salt.utils.path
from salt.ext.six.moves import map
log = logging.getLogger(__name__)
__virtualname__ = 'glxinfo'
last_state = {}
def __virtual__():
which_result = salt.utils.path.which('glxinfo')
if which_result is None:
return False
else:
return __virtualname__
def validate(config):
'''
Validate the beacon configuration
'''
# Configuration for glxinfo beacon should be a dictionary
if not isinstance(config, list):
return False, ('Configuration for glxinfo beacon must be a list.')
_config = {}
list(map(_config.update, config))
if 'user' not in _config:
return False, ('Configuration for glxinfo beacon must '
'include a user as glxinfo is not available to root.')
return True, 'Valid beacon configuration'
def beacon(config):
'''
Emit the status of a connected display to the minion
Mainly this is used to detect when the display fails to connect
for whatever reason.
.. code-block:: yaml
beacons:
glxinfo:
- user: frank
- screen_event: True
'''
log.trace('glxinfo beacon starting')
ret = []
_config = {}
list(map(_config.update, config))
retcode = __salt__['cmd.retcode']('DISPLAY=:0 glxinfo',
runas=_config['user'], python_shell=True)
if 'screen_event' in _config and _config['screen_event']:
last_value = last_state.get('screen_available', False)
screen_available = retcode == 0
if last_value != screen_available or 'screen_available' not in last_state:
ret.append({'tag': 'screen_event', 'screen_available': screen_available})
last_state['screen_available'] = screen_available
return ret
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