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# Copyright (c) 2012 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
import sys
import ovs.daemon
import ovs.unixctl
import ovs.unixctl.client
import ovs.util
import ovs.vlog
from ovs.fatal_signal import signal_alarm
def connect_to_target(target):
error, str_result = ovs.unixctl.socket_name_from_target(target)
if error:
ovs.util.ovs_fatal(error, str_result)
else:
socket_name = str_result
error, client = ovs.unixctl.client.UnixctlClient.create(socket_name)
if error:
ovs.util.ovs_fatal(error, "cannot connect to \"%s\"" % socket_name)
return client
def main():
parser = argparse.ArgumentParser(description="Python Implementation of"
" ovs-appctl.")
parser.add_argument("-t", "--target", default="ovs-vswitchd",
help="pidfile or socket to contact")
parser.add_argument("command", metavar="COMMAND",
help="Command to run.")
parser.add_argument("argv", metavar="ARG", nargs="*",
help="Arguments to the command.")
parser.add_argument("-T", "--timeout", metavar="SECS",
help="wait at most SECS seconds for a response")
args = parser.parse_args()
signal_alarm(int(args.timeout) if args.timeout else None)
ovs.vlog.Vlog.init()
target = args.target
client = connect_to_target(target)
err_no, error, result = client.transact(args.command, args.argv)
client.close()
if err_no:
ovs.util.ovs_fatal(err_no, "%s: transaction error" % target)
elif error is not None:
sys.stderr.write(error)
ovs.util.ovs_error(0, "%s: server returned an error" % target)
sys.exit(2)
else:
assert result is not None
sys.stdout.write(result)
if __name__ == '__main__':
main()
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