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

def __run__(params):
    zoateds = {}
    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
            if available < int(params.get("critical", 800)):
                zoateds[dataset.split('.')[0]] = "%s GB" % int(available)

    if zoateds:
        return [2, 'CRITICAL -  %s' % ", ".join(["%s: %s" % (k, v) for k,v in zoateds.items()])]

    return [0, "OK"]