netdata/python.d/python_modules/lm_sensors.py at master · chenbk85/netdata · GitHub

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"""

@package sensors.py

Python Bindings for libsensors3

use the documentation of libsensors for the low level API.

see example.py for high level API usage.

@author: Pavel Rojtberg (http://www.rojtberg.net)

@see: https://github.com/paroj/sensors.py

@copyright: LGPLv2 (same as libsensors) <http://opensource.org/licenses/LGPL-2.1>

"""

from ctypes import *

import ctypes.util

_libc = cdll.LoadLibrary(ctypes.util.find_library("c"))

# see https://github.com/paroj/sensors.py/issues/1

_libc.free.argtypes = [c_void_p]

_hdl = cdll.LoadLibrary(ctypes.util.find_library("sensors"))

version = c_char_p.in_dll(_hdl, "libsensors_version").value.decode("ascii")

class bus_id(Structure):

_fields_ = [("type", c_short),

("nr", c_short)]

class chip_name(Structure):

_fields_ = [("prefix", c_char_p),

("bus", bus_id),

("addr", c_int),

("path", c_char_p)]

class feature(Structure):

_fields_ = [("name", c_char_p),

("number", c_int),

("type", c_int)]

# sensors_feature_type

IN = 0x00

FAN = 0x01

TEMP = 0x02

POWER = 0x03

ENERGY = 0x04

CURR = 0x05

HUMIDITY = 0x06

MAX_MAIN = 0x7

VID = 0x10

INTRUSION = 0x11

MAX_OTHER = 0x12

BEEP_ENABLE = 0x18

class subfeature(Structure):

_fields_ = [("name", c_char_p),

("number", c_int),

("type", c_int),

("mapping", c_int),

("flags", c_uint)]

_hdl.sensors_get_detected_chips.restype = POINTER(chip_name)

_hdl.sensors_get_features.restype = POINTER(feature)

_hdl.sensors_get_all_subfeatures.restype = POINTER(subfeature)

_hdl.sensors_get_label.restype = c_void_p # return pointer instead of str so we can free it

_hdl.sensors_get_adapter_name.restype = c_char_p # docs do not say whether to free this or not

_hdl.sensors_strerror.restype = c_char_p

### RAW API ###

MODE_R = 1

MODE_W = 2

COMPUTE_MAPPING = 4

def init(cfg_file=None):

file = _libc.fopen(cfg_file.encode("utf-8"), "r") if cfg_file is not None else None

if _hdl.sensors_init(file) != 0:

raise Exception("sensors_init failed")

if file is not None:

_libc.fclose(file)

def cleanup():

_hdl.sensors_cleanup()

def parse_chip_name(orig_name):

ret = chip_name()

err = _hdl.sensors_parse_chip_name(orig_name.encode("utf-8"), byref(ret))

if err < 0:

raise Exception(strerror(err))

return ret

def strerror(errnum):

return _hdl.sensors_strerror(errnum).decode("utf-8")

def free_chip_name(chip):

_hdl.sensors_free_chip_name(byref(chip))

def get_detected_chips(match, nr):

"""

@return: (chip, next nr to query)

"""

_nr = c_int(nr)

if match is not None:

match = byref(match)

chip = _hdl.sensors_get_detected_chips(match, byref(_nr))

chip = chip.contents if bool(chip) else None

return chip, _nr.value

def chip_snprintf_name(chip, buffer_size=200):

"""

@param buffer_size defaults to the size used in the sensors utility

"""

ret = create_string_buffer(buffer_size)

err = _hdl.sensors_snprintf_chip_name(ret, buffer_size, byref(chip))

if err < 0:

raise Exception(strerror(err))

return ret.value.decode("utf-8")

def do_chip_sets(chip):

"""

@attention this function was not tested

"""

err = _hdl.sensors_do_chip_sets(byref(chip))

if err < 0:

raise Exception(strerror(err))

def get_adapter_name(bus):

return _hdl.sensors_get_adapter_name(byref(bus)).decode("utf-8")

def get_features(chip, nr):

"""

@return: (feature, next nr to query)

"""

_nr = c_int(nr)

feature = _hdl.sensors_get_features(byref(chip), byref(_nr))

feature = feature.contents if bool(feature) else None

return feature, _nr.value

def get_label(chip, feature):

ptr = _hdl.sensors_get_label(byref(chip), byref(feature))

val = cast(ptr, c_char_p).value.decode("utf-8")

_libc.free(ptr)

return val

def get_all_subfeatures(chip, feature, nr):

"""

@return: (subfeature, next nr to query)

"""

_nr = c_int(nr)

subfeature = _hdl.sensors_get_all_subfeatures(byref(chip), byref(feature), byref(_nr))

subfeature = subfeature.contents if bool(subfeature) else None

return subfeature, _nr.value

def get_value(chip, subfeature_nr):

val = c_double()

err = _hdl.sensors_get_value(byref(chip), subfeature_nr, byref(val))

if err < 0:

raise Exception(strerror(err))

return val.value

def set_value(chip, subfeature_nr, value):

"""

@attention this function was not tested

"""

val = c_double(value)

err = _hdl.sensors_set_value(byref(chip), subfeature_nr, byref(val))

if err < 0:

raise Exception(strerror(err))

### Convenience API ###

class ChipIterator:

def __init__(self, match=None):

self.match = parse_chip_name(match) if match is not None else None

self.nr = 0

def __iter__(self):

return self

def __next__(self):

chip, self.nr = get_detected_chips(self.match, self.nr)

if chip is None:

raise StopIteration

return chip

def __del__(self):

if self.match is not None:

free_chip_name(self.match)

def next(self): # python2 compability

return self.__next__()

class FeatureIterator:

def __init__(self, chip):

self.chip = chip

self.nr = 0

def __iter__(self):

return self

def __next__(self):

feature, self.nr = get_features(self.chip, self.nr)

if feature is None:

raise StopIteration

return feature

def next(self): # python2 compability

return self.__next__()

class SubFeatureIterator:

def __init__(self, chip, feature):

self.chip = chip

self.feature = feature

self.nr = 0

def __iter__(self):

return self

def __next__(self):

subfeature, self.nr = get_all_subfeatures(self.chip, self.feature, self.nr)

if subfeature is None:

raise StopIteration

return subfeature

def next(self): # python2 compability

return self.__next__()

netdata/python.d/python_modules/lm_sensors.py at master · chenbk85/netdata · GitHub

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