contrib/cpu-temp-log

   1 #! /usr/bin/env python
   2 # coding: utf-8
   3 """\
   4 Usage: cpu-temper-log
   5
   6 Reads 'sensors -u' for temperature data.  Writes all temperatures found
   7 to stdout.  One temp per line, preceded by the unix UTC time in seconds,
   8 and an identifier.
   9
  10 Before you can use this utility lm_sensors must be installed and
  11 configured.  See their documentation for that procedure.
  12
  13 How many temperatures, which temeratures and in which order will depend
  14 on your lm_sensors configuration and your motherboard.
  15
  16 Sample log from an Supermicro Quad Core Xeon:
  17
  18 1471573103 LM0 37.000
  19 1471573103 LM1 35.000
  20 1471573103 LM2 31.000
  21 1471573103 LM3 31.000
  22 1471573103 LM4 30.000
  23 1471573104 LM0 37.000
  24
  25 Field 1: unix time in seconds since the star of the epoch
  26 Field 2: Log source (LM)
  27 Field 3: temperature in degrees C
  28
  29 Sample crontab usage:
  30
  31 # take and log cpu temp every 5 mins
  32 */5 * * * * /usr/local/sbin/cpu-temp-log >> /var/log/ntpstats/temps
  33
  34 This file may only be useful as a template.  The way to read your system
  35 temperatures will be hardware specific.
  36
  37 """
  38
  39 from __future__ import print_function, division
  40
  41 import sys
  42 import re
  43 import time
  44 import subprocess
  45
  46 try:
  47     # sadly subprocess.check_output() is not in Python 2.6
  48     proc = subprocess.Popen(["sensors", "-u"],
  49                             stdout=subprocess.PIPE,
  50                             stderr=subprocess.STDOUT,
  51                             universal_newlines=True)
  52     output = proc.communicate()[0]
  53 except:
  54     print("Unable to run 'sensors -u'")
  55     exit(0)
  56
  57 lines = output.split('\n')
  58
  59 # this regex matches temperature output lines from 'sensors -u'
  60 pat = re.compile(r'^\s+temp\d+_input:\s+([\d\.]+).*$')
  61
  62 now = int(time.time())
  63
  64 line = ''
  65 index = 0
  66 for line in lines:
  67     match = pat.match(line)
  68     if match and match.group(1):
  69         temp = match.group(1)
  70         sys.stdout.write('%d LM%d %s\n' % (now, index, temp))
  71         index += 1