def _execute_shell_cmd(cmd, options, *args, **kwargs):
"""Execute a given shell command passing it
given options (flags) and arguments.
Takes optional keyword arguments:
:param as_root: Execute as root.
:type as_root: boolean
:param timeout: Number of seconds if specified,
default if not.
There is no timeout if set to None.
:type timeout: integer
:raises: class:`UnknownArgumentError` if passed unknown args.
"""
exec_args = {}
if kwargs.pop('as_root', False):
exec_args['run_as_root'] = True
exec_args['root_helper'] = 'sudo'
if 'timeout' in kwargs:
exec_args['timeout'] = kwargs.pop('timeout')
if kwargs:
raise UnknownArgumentError(_("Got unknown keyword args: %r") % kwargs)
cmd_flags = _build_command_options(options)
cmd_args = cmd_flags + list(args)
utils.execute_with_timeout(cmd, *cmd_args, **exec_args)
def _execute_service_command(service_candidates, command_key, **kwargs):
"""
:param service_candidates List of possible system service names.
:type service_candidates list
:param command_key One of the actions returned by
'service_discovery'.
:type command_key string
:param timeout: Number of seconds if specified,
default if not.
There is no timeout if set to None.
:type timeout: integer
:raises: :class:`UnknownArgumentError` if passed unknown args.
:raises: :class:`UnprocessableEntity` if no candidate names given.
:raises: :class:`RuntimeError` if command not found.
"""
exec_args = {}
if 'timeout' in kwargs:
exec_args['timeout'] = kwargs.pop('timeout')
if kwargs:
raise UnknownArgumentError(_("Got unknown keyword args: %r") % kwargs)
if service_candidates:
service = service_discovery(service_candidates)
if command_key in service:
utils.execute_with_timeout(service[command_key],
shell=True,
**exec_args)
else:
raise RuntimeError(
_("Service control command not available: %s") % command_key)
else:
raise exception.UnprocessableEntity(
_("Candidate service names not "
"specified."))