Started command line interface

common/__init__.py

@@ -1,2 +1,3 @@
 import input
 import sequences
+import cli

common/cli.py

@@ -0,0 +1,21 @@
+# vim: set sts=4 sw=4 cindent nowrap expandtab:
+
+import cmd, sys
+
+class CommandLineInterface(cmd.Cmd):
+    def __init__(self):
+        cmd.Cmd.__init__(self)
+        self.prompt = "inf> "
+
+    def do_EOF(self, string):
+        print string
+        sys.exit(0)
+
+    def do_quit(self, string):
+        sys.exit(0)
+
+    def do_exit(self, string):
+        sys.exit(0)
+
+    def do_help(self, string):
+        print string

main.py

@@ -18,6 +18,10 @@
 import sys, getopt, yaml
 
 def main():
+    # go into command line mode if no arguments are given
+    if len(sys.argv) == 1:
+        command_line_interface()
+        sys.exit(0)
 
      # Defaults
     format = "pcap"
@@ -146,7 +150,10 @@ def parseConfig(f):
     except Exception as e:
         print "Could not parse config file \"%s\": %s" % (f, e)
         sys.exit(-1)
-
+
+def command_line_interface():
+    cmdline = common.cli.CommandLineInterface()
+    cmdline.cmdloop()
 
 if __name__ == "__main__":
     main()