#!/usr/bin/env python3
###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems)   #
# and others                                                                  #
#                                                                             #
# All rights reserved. This program and the accompanying materials            #
# are made available under the terms of the Apache License, Version 2.0       #
# which accompanies this distribution, and is available at                    #
# http://www.apache.org/licenses/LICENSE-2.0                                  #
###############################################################################

import re
import sys
import subprocess

from binary_converter import binary2str


if len(sys.argv) < 2:
    print('name of interface must be specified')
    exit(2)
nic_name = str(sys.argv[1])

rc = 0

try:
    out = subprocess.check_output(["ifconfig " + nic_name],
                                  stderr=subprocess.STDOUT,
                                  shell=True)
    out = binary2str(out)
    lines = out.splitlines()
    line_number = 1
    line = -1
    while line_number < len(lines):
        line = lines[line_number]
        if ' BROADCAST ' in line:
            break
        line_number += 1
    state_match = re.match('^\W+([A-Z]+)', line)
    if not state_match:
        rc = 2
        print('Error: failed to find status in ifconfig output: ' + out)
    else:
        rc = 0 if state_match.group(1) == 'UP' else 2
        print(out)
except subprocess.CalledProcessError as e:
    print("Error finding NIC {}: {}\n".format(nic_name, binary2str(e.output)))
    rc = 2

exit(rc)