Simple telnet demo.

demo/telnet.py

+# Simple telnet demo.  Expects a host and user name on the command line,
+# reads a password from stdin, logs in on that host, runs "uname -a",
+# and prints the result.
+
+import os
+import sys
+
+import pcl_expect
+
+host = sys.argv[1]
+user = sys.argv[2]
+
+sys.stdout.write("Password for %s at %s? " % (user, host))
+sys.stdout.flush()
+
+try:
+    os.system("stty -echo")
+    password = sys.stdin.readline()
+finally:
+    os.system("stty echo")
+print
+
+if len(password) > 0 and password[-1] == "\n":
+    password = password[:-1]
+
+t = pcl_expect.telnet(host, "23")
+
+x = pcl_expect.impl()
+while x.loop():
+    if x.re(t, "ogin:"):
+        t.send(user + "\n")
+
+x = pcl_expect.impl()
+while x.loop():
+    if x.re(t, "assword:"):
+        t.send(password + "\n")
+
+x = pcl_expect.impl()
+while x.loop():
+    if x.re(t, ">|\\$|#"):
+        t.send("uname -a\n")
+    elif x.re(t, "incorrect"):
+        print "Wrong password"
+        t.close()
+        sys.exit(1)
+        
+x = pcl_expect.impl()
+while x.loop():
+    if x.re(t, "(.*)\r?\n.*(>|\\$|#)"):
+        print "SYSTEM ID:", t.match.group(1)
+        t.send("exit\n")
+        
+x = pcl_expect.impl()
+while x.loop():
+    if x.eof(t):
+        t.close()