import os
import sys
import socket
socket.setdefaulttimeout(5)

def __run__(params):
  Critical = {}

  f = open('/etc/mtab')

  for l in f.readlines():
    line = l.strip().split()
    if line[2] == 'nfs' and 'ISOs' not in line[0]:
      dataset, mountpoint = line[:2]
      disk = os.statvfs(mountpoint)
      available = (disk.f_bsize * disk.f_bavail)/1.073741824e9
      capacity = (disk.f_bsize * disk.f_blocks)/1.073741824e9
      used = disk.f_bsize * (disk.f_blocks - disk.f_bavail)/1.073741824e9
      percentage_used = ((100 * used) / capacity) + 1
      if percentage_used > int(params.get("critical", 800)):
        Critical[dataset.split('.')[0]] = "%s%% used" % int(percentage_used)

  if Critical:
    return [2, 'CRITICAL -  %s' % ", ".join(["%s: %s" % (k, v) for k,v in Critical.items()])]
  return [0, ' %s%% used' % int(percentage_used)]