/usr/lib/python2.7/dist-packages/rosgraph/rosenv.py is in python-rosgraph 1.11.16-3.
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#
# Copyright (c) 2009, Willow Garage, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Willow Garage, Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import os
import sys
ROS_MASTER_URI = "ROS_MASTER_URI"
ROS_IP ="ROS_IP"
ROS_IPV6 ="ROS_IPV6"
ROS_HOSTNAME ="ROS_HOSTNAME"
ROS_NAMESPACE ="ROS_NAMESPACE"
def get_master_uri(env=None, argv=None):
"""
Get the :envvar:`ROS_MASTER_URI` setting from the command-line args or
environment, command-line args takes precedence.
:param env: override environment dictionary, ``dict``
:param argv: override ``sys.argv``, ``[str]``
:raises: :exc:`ValueError` If :envvar:`ROS_MASTER_URI` value is invalidly
specified
"""
if env is None:
env = os.environ
if argv is None:
argv = sys.argv
try:
for arg in argv:
if arg.startswith('__master:='):
val = None
try:
_, val = arg.split(':=')
except:
pass
# we ignore required here because there really is no
# correct return value as the configuration is bad
# rather than unspecified
if not val:
raise ValueError("__master remapping argument '%s' improperly specified"%arg)
return val
if ROS_MASTER_URI in env:
return env[ROS_MASTER_URI]
else:
return 'http://localhost:11311'
except KeyError as e:
return None
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