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# Copyright (C) 2013-2015 eNovance SAS <licensing@enovance.com>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Functions to read data from hardware sensors."""
import os
import sys
def read_hwmon(hwlst, entry, sensor, label_name, appendix, processor_num,
entry_name):
try:
hwmon = "%s_%s" % (sensor, appendix)
filename = "/sys/devices/platform/%s/%s" % (entry, hwmon)
if not os.path.isfile(filename):
if len(hwmon) > 16:
# Some kernels are shortening the filename to 17 chars
# Let's try to find if we are in this case
filename = "/sys/devices/platform/%s/%s" % (entry, hwmon[:16])
if not os.path.isfile(filename):
sys.stderr.write("read_hwmon: No entry found for %s/%s\n" %
(label_name, entry_name))
return
else:
sys.stderr.write("read_hwmon: No entry found for %s/%s\n" %
(label_name, entry_name))
return
value = open(filename, 'r').readline().strip()
hwlst.append(('cpu', 'physical_%d' % processor_num, "%s/%s" %
(label_name, entry_name), value))
except Exception:
pass
def detect_temperatures():
hwlst = []
for entry in os.listdir("/sys/devices/platform/"):
if entry.startswith("coretemp."):
processor_num = int(entry.split(".")[1])
for label in os.listdir("/sys/devices/platform/%s" % entry):
if label.startswith("temp") and label.endswith("_label"):
sensor = label.split("_")[0]
try:
with open("/sys/devices/platform/%s/%s_label" %
(entry, sensor), 'r') as fsensor:
label_name = fsensor.readline()
label_name = label_name.strip().replace(" ", "_")
except Exception:
sys.stderr.write("detect_temperatures: "
"Cannot open label on %s/%s\n" %
(entry, sensor))
continue
read_hwmon(hwlst, entry, sensor, label_name, "input",
processor_num, "temperature")
read_hwmon(hwlst, entry, sensor, label_name, "max",
processor_num, "max")
read_hwmon(hwlst, entry, sensor, label_name, "crit",
processor_num, "critical")
read_hwmon(hwlst, entry, sensor, label_name, "crit_alarm",
processor_num, "critical_alarm")
return hwlst
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