Add facility for confetty to interact with external controller

For certain scenarios (e.g. wcons), having a path to get in and communicate data from the outside.
For starters, have a 'GETWINID' directive for wcons to use to fetch the unambiguous window id
to use for xwininfo tricks.  TODO includes concepts from xtcd.pl that enabled things like warr

confluent_client/bin/confetty

@@ -62,6 +62,7 @@ path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
 if path.startswith('/opt'):
     sys.path.append(path)
 
+import confluent.termhandler as termhandler
 import confluent.tlvdata as tlvdata
 import confluent.client as client
 
@@ -509,12 +510,16 @@ def check_escape_seq(currinput, filehandle):
         currinput += filehandle.read()
     return currinput
 
-
 parser = optparse.OptionParser()
 parser.add_option("-s", "--server", dest="netserver",
                   help="Confluent instance to connect to",
                   metavar="SERVER:PORT")
+parser.add_option("-c", "--control", dest="controlpath",
+                  help="Path to offer terminal control",
+                  metavar="PATH")
 opts, shellargs = parser.parse_args()
+if opts.controlpath:
+    termhandler.TermHandler(opts.controlpath)
 if opts.netserver:  # going over a TLS network
     session = client.Command(opts.netserver)
 elif 'CONFLUENT_HOST' in os.environ:

confluent_client/confluent/termhandler.py

@@ -0,0 +1,63 @@
+__author__ = 'jbjohnso'
+
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2014 Lenovo Corporation
+#
+# 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.
+
+#This file is responsible for a client-side communication method to enable
+#capabilities like measuring and rearranging the terminal window for
+#wcons
+
+import atexit
+import os
+import socket
+import stat
+import threading
+
+class TermHandler(object):
+    def __init__(self, path):
+        self.path = path
+        self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        try:
+            os.remove(path)
+        except OSError:  # if file does not exist, no big deal
+            pass
+        atexit.register(self.shutdown)
+        self.socket.bind(path)
+        os.chmod(path, stat.S_IWUSR | stat.S_IRUSR)
+        threading.Thread(target=self.sockinteract).start()
+
+    def shutdown(self):
+        try:
+            os.remove(self.path)
+        except OSError:
+            pass
+
+    def sockinteract(self):
+        self.socket.listen(5)
+        while True:
+            connection = None
+            try:
+                connection, address = self.socket.accept()
+                connection.sendall("confetty control v1--\n")
+                cmd = connection.recv(8)
+                if 'GETWINID' == cmd:
+                    connection.sendall(os.environ['WINDOWID'])
+                connection.close()
+            except BaseException:
+                pass
+            finally:
+                if connection is not None:
+                    connection.close()