diff -ur v5/chat_conn.py v6/chat_conn.py
--- v5/chat_conn.py	Sat Aug 31 14:18:00 2019
+++ v6/chat_conn.py	Sun Sep  1 15:30:00 2019
@@ -5,6 +5,8 @@
 import select
 import time
 import threading
+import os
+import signal
 import subprocess
 try:
 	import queue
@@ -413,7 +415,30 @@
 	th.join()
 	cli.dis_conn()
 
+def sproc_new(cmd):
+	proc = None
+	if cmd:
+		try:
+			PIPE = subprocess.PIPE
+			proc = subprocess.Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE, preexec_fn=os.setsid)
+		except:
+			pass
+
+	(stdin, stdout) = (proc.stdin, proc.stdout) if proc else (None, None)
+
+	def kill():
+		if proc:
+			proc.poll()
+			if proc.returncode == None:
+				os.killpg(proc.pid, signal.SIGKILL)
+
+	return Empty( locals() )
+
 def cmd_io_new(cmd):
+	k = 'cont:'
+	cont_f = cmd.startswith(k)
+	if cont_f:
+		cmd = cmd[len(k):]
 	k = 'me:'
 	me_f = cmd.startswith(k)
 	if me_f:
@@ -421,15 +446,20 @@
 
 	que = queue.Queue()
 
+	sproc = sproc_new(cmd) if cont_f and cmd else None
+
 	def func_in():
 		s = None
-		if cmd:
+		f = sproc.stdout if sproc else sys.stdin
+
+		if cmd and sproc == None:
 			try:
 				s = que.get(timeout=tmout)
 			except:
 				pass
-		elif readable(sys.stdin):
-			s = sys.stdin.readline().strip()
+		elif f and readable(f):
+			s = f.readline().strip()
+			# print('func_in {}'.format(s)) # dbg
 		return s
 
 	def cmd_exec(s, cmd):
@@ -439,22 +469,27 @@
 			que.put(ret)
 
 	def func_out(f, s, name):
-		if cmd:
-			if me_f:
-				k = ' >' + name
-				if s.endswith(k):
-					cmd_exec( s[:-len(k)], cmd )
-			else:
-				cmd_exec( '{}> {}'.format(f, s), cmd )
+		if me_f:
+			k = ' >' + name
+			if not s.endswith(k):
+				return
+			s = s[:-len(k)]
 		else:
-			print( '{}> {}'.format(f, s) )
+			s = '{}> {}'.format(f, s)
+		f = sproc.stdin if sproc else sys.stdout
+		if cmd and sproc == None:
+			cmd_exec(s, cmd)
+		elif f:
+			f.write(s+'\n')
+			f.flush()
+			# print('func_out {}'.format(s)) # dbg
 
 	return Empty( locals() )
 
 def help(v):
 	ss = [
 		'Usage: {} <port> [conn [<user name>] [host=<hostname>] \\'.format(sys.argv[0]),
-		'  [cmd=[me:]<cmd>]]',
+		'  [cmd=[cont:][me:]<cmd>]]',
 		'  conn: client mode',
 		'  user name: default "guest"',
 		'  hostname: default "localhost"',