quick hack to log port status of cisco switches

portstatus.py

#!/usr/bin/python
import os
import telnetlib
import time

prompt = os.environ['PROMPT']+">"
if 'USERN' in os.environ:
    usern = os.environ['USERN']
else:
    usern = None
passw = os.environ['PASSW']
host = os.environ['HOST']
print [passw, usern]
tn = telnetlib.Telnet(host)
if usern:
    tn.read_until("login: ")
    tn.write(usern+"\n")
tn.read_until("Password: ")
tn.write(passw+"\n")
#while 1: print [tn.read_some()],
tn.read_until(prompt)
tn.write("terminal length 0\n")
tn.read_until(prompt)
while 1:
    tn.write("show int\n")
    filename = "show_int-%s.txt" % host
    with open(filename+".tmp", "w") as f:
        for line in tn.read_until(prompt).split("\n"):
            w = None
            if line.startswith("FastEthernet"):
                w = line.strip()
            elif line.startswith("GigabitEthernet"):
                w = line.strip()
            if w:
                f.write(w+"\n")
    os.rename(filename+".tmp", filename)
    os.system("git commit -am '' --allow-empty-message")
    time.sleep(60)