#!/usr/pkg/bin/python
"""socketpair example

   gotta get the hang of IPC one of these days"""

Copyright = """
    socketpair -- simple test of how socketpair works
    Copyright (C) 2005  John Comeau <jc.jcomeau.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    """
errormessage = "Not all needed libraries found, upgrade or check path"
try:
 True # not defined in older Python releases
except:
 True, False = 1, 0
try:
 import sys, os, types, re, pwd
 sys.path.append(os.sep.join([pwd.getpwuid(os.geteuid())[5], 'lib', 'python']))
 from com.jcomeau import gpl, jclicense
except:
 try:
  sys.stderr.write("%s\n" % errormessage)
 except:
  print errormessage
 raise

# get name this program was called as
self = sys.argv[0].split(os.sep)[-1]
command = self.split('.')[0]  # chop any suffix (extension)
# now get name we gave it when we wrote it
originalself = Copyright.split()[0]

# globals and routines that should be in every program
# (yes, you could import them, but there are problems in that approach too)

def DebugPrint(*whatever):
 return False  # defined instead by pytest module, use that for debugging

# other globals, specific to this program
import socket

def socketpair(*args):
 """set up a socketpair and send messages back and forth"""
 try:
  parent, child = socket.socketpair(socket.AF_UNIX, socket.SOCK_DGRAM)
  pid = os.fork()
  if pid:  # parent process
   parent.close()
   child.send("hear me talkin' to ya")
   message = child.recv(1024)
   print "child sent '%s'" % message
  else:
   child.close()
   message = parent.recv(1024)
   print "parent sent '%s'" % message
   parent.send("yep i hear ya")
 except:
  raise

if __name__ == '__main__':
 # if this program was imported by another, the above test will fail,
 # and this following code won't be used...
 function = command; args = sys.argv[1:]  # default case
 if command == originalself:
  try:
   if len(args) and eval('type(%s) == types.FunctionType' % args[0]):
    function = sys.argv[1]; args = sys.argv[2:]
  except: pass
 eval('%s%s' % (function, repr(tuple(args))))
else:
 # if you want something to be done on import, do it here; otherwise pass
 pass