#!/usr/bin/python3
import sys
import re
import datetime
import os
from rrdtool import update as rrd_update # pylint: disable=no-name-in-module

SUBFOLDER = ''
#print(datetime.datetime.now().strftime("%V"))

# root@plex:/opt/monitor# free
#               total        used        free      shared  buff/cache   available
# Mem:        5904284      353696      190204        3524     5360384     5238048
# Swap:       2097148      248064     1849084


re3 = re.compile(r"\d+")

def save(filename, string):
    fo = open(os.path.join(SUBFOLDER, filename+'_'+datetime.datetime.now().strftime("%V"))+'.log', "a")
    fo.writelines( string + "\n" )
    fo.close()

for line in sys.stdin:
    if 'Mem:' in line:
        mems = re3.findall(line)
        # save('mem_', ";".join(mems))
        print('N:{0}:{1}:{2}:{3}'.format( mems[0], mems[2], mems[1], int(mems[0])-int(mems[5])))
        ret = rrd_update(os.path.join(SUBFOLDER, 'mem.rrd'), 'N:{0}:{1}:{2}:{3}'.format( mems[0], mems[2], mems[1], int(mems[0])-int(mems[5])) )