Create tcpServer_signals.py

Author: ahhh

bin/tcpServer_signals.py

@@ -0,0 +1,49 @@
+#! /bin/python
+# Program for messing with tcp server and signals 
+
+import sys, signal, socket, random
+
+# set our socket as a global variable
+s = 0
+ 
+def signal_handler(signum, frm) :
+  global s
+  print "SIGINT received"
+  print "Shutting down listener gracefully."
+  # now shut it down
+  s.close()
+  print "Exiting now."
+  sys.exit()
+
+def tcp_listner():
+  global s
+  # pick a random port and fetch host
+  port = random.randrange(18000,65535,1)
+  host = socket.gethostname()
+ 
+  # point SIGINT to signal_handler 
+  signal.signal(signal.SIGINT, signal_handler)
+
+  print "Opening port %d." % (port)
+  try: 
+    # try to create a socket
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  except socket.error:
+    print 'Socket creation failed!'
+    sys.exit()
+ 
+  print "Binding to host %s port %d" % (host,port)
+  s.bind((host,port))
+  # open up a listener that will accept 1 connection
+  s.listen(1)
+
+if __name__ == '__main__':
+  print "Starting tcp listner..."
+  tcp_listner()
+
+  # SIGINT is the signal for program interupt
+  signal.signal(signal.SIGINT, signal_handler)
+ 
+  # and now we wait
+  while True:
+    pass