Commit 6ab66655 authored by Nico Schottelius's avatar Nico Schottelius

Add functioning cbacklight

parent 762ea6bc
#!/usr/bin/python3
import glob
import os
import argparse
basepath="/sys/class/backlight/"
def get_dirs():
return glob.glob("{}*".format(basepath)):
def get_driver_from_dir(directory):
regexp = r"{}(?P<driver>.+)".format(basepath)
return re.match(regexp, directory).groupdict()['driver']
for dir in
valf = os.path.join(dir, "brightness")
maxf = os.path.join(dir, "max_brightness")
with open(valf, "r") as fd:
val = int("".join(fd.readlines()))
with open(maxf, "r") as fd:
maxval = int("".join(fd.readlines()))
percent = (val/maxval)*100
print("{} {} = {:.2f}%".format(val,maxval,percent))
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='cbacklight')
parser.add_argument('--inc', help='Increment by percentage (points)')
parser.add_argument('--dec', help='Decrement by percentage (points)')
parser.add_argument('--set', help='Set to percentage')
#!/usr/bin/python3
# Nico Schottelius
# 2018-03-30
# Copying: GPLv3
#
#
# Set / increase brightness to sysfs directly
#
import glob
import os
import argparse
import re
import sys
class BackLight(object):
basepath="/sys/class/backlight/"
def __init__(self, name):
self.name = name
self.dirname = os.path.join(self.basepath, name)
self.brightness_file = os.path.join(self.dirname, "brightness")
self.max_brightness_file = os.path.join(self.dirname, "max_brightness")
@staticmethod
def read_value(filename):
with open(filename, "r") as fd:
val = int("".join(fd.readlines()))
return val
@staticmethod
def write_value(filename, value):
try:
with open(filename, "w") as fd:
fd.write(str(value))
except PermissionError as e:
print("Cannot write to {}: {}".format(filename, e))
sys.exit(1)
@classmethod
def get_dirs(cls):
return glob.glob("{}*".format(cls.basepath))
@classmethod
def get_driver_from_dir(cls, directory):
regexp = r"{}(?P<driver>.+)".format(cls.basepath)
return re.match(regexp, directory).groupdict()['driver']
@classmethod
def get_drivers(cls):
return [ cls(cls.get_driver_from_dir(x)) for x in cls.get_dirs() ]
def get_value(self):
return self.read_value(self.brightness_file)
def get_max_value(self):
return self.read_value(self.max_brightness_file)
def get_percentage(self):
val = self.get_value()
maxval = self.get_max_value()
percent = (val/maxval)*100
return percent
def get_percentage_points(self, percent):
"""Return integer equivalent to percent"""
points = int((percent * self.get_max_value()) / 100)
return points
def inc_percent(self, percent):
points = self.get_percentage_points(percent)
new_value = self.get_value() + points
self.set_value(new_value)
def dec_percent(self, percent):
points = self.get_percentage_points(percent)
new_value = self.get_value() - points
self.set_value(new_value)
def set_percent(self, percent):
new_value = int((percent * self.get_max_value()) / 100)
self.set_value(new_value)
def set_value(self, value):
if value < 0:
value = 0
if value > self.get_max_value():
value = self.get_max_value()
self.write_value(self.brightness_file, value)
def is_readable(self):
return os.access(self.max_brightness_file, os.R_OK)
def __str__(self):
return self.name
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='cbacklight')
group = parser.add_mutually_exclusive_group()
group.add_argument('--inc', help='Increment by percentage (points)')
group.add_argument('--dec', help='Decrement by percentage (points)')
group.add_argument('--set', help='Set to percentage')
parser.add_argument('--get', help='Get percentage (default)', action='store_true')
args = parser.parse_args()
anyarg = args.inc or args.dec or args.set
drivers = BackLight.get_drivers()
method = None
if args.inc:
method = "inc_percent"
val = args.inc
if args.dec:
method = "dec_percent"
val = args.dec
if args.set:
method = "set_percent"
val = args.set
if method:
for d in drivers:
func = getattr(d, method)
func(int(val))
if not anyarg or args.get:
for d in drivers:
print("{}: {:.2f}%".format(d, d.get_percentage()))
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