eff11b83fe
Low-hanging fruit of Python3 compatibility work. I've left fix_py_compile.py as it is only ever going to be run under Python 2.
118 lines
3.9 KiB
Python
118 lines
3.9 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# Copyright (c) 2014 MIT OpenCourseWare
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# Copyright (c) 2017 Adafruit Industries
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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#
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# Code originally published at http://stackoverflow.com/questions/4648792/ and
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# subsequently forked at https://github.com/ponycloud/python-sysfs
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#
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# Original author: Benedikt Reinartz <filmor@gmail.com>
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# Contributors:
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# - Jan Dvořák <mordae@anilinux.org>
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# - Jonathon Reinhart https://github.com/JonathonReinhart
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# - Ondřej Koch <o.koch@zerusnet.com>
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# - David Planella <david.planella@ubuntu.com>
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"""
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Simplistic Python SysFS interface. It enables access to the sys filesystem device
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nodes and to get and set their exposed attributes.
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Usage examples::
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from sysfs import sys
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# Print all block devices in /sys, with their sizes
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for block_dev in sys.block:
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print(block_dev, str(int(block_dev.size) / 1048576) + ' M')
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>>> import sysfs
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>>> # Read/write Beaglebone Black's eQEP module attributes
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>>> eqep0 = sysfs.Node("/sys/devices/platform/ocp/48300000.epwmss/48300180.eqep")
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>>> # Read eqep attributes
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>>> eqep0.enabled
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'1'
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>>> eqep0.mode
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'0'
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>>> eqep0.period
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'1000000000'
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>>> eqep0.position
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'0'
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>>> # Write eqep attributes. They should be strings.
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>>> eqep0.position = str(2)
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>>> eqep0.position
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'2'
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"""
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from os import listdir
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from os.path import isdir, isfile, join, realpath, basename
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__all__ = ['sys', 'Node']
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class Node(object):
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__slots__ = ['_path_', '__dict__']
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def __init__(self, path='/sys'):
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self._path_ = realpath(path)
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if not self._path_.startswith('/sys/') and not '/sys' == self._path_:
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raise RuntimeError('Using this on non-sysfs files is dangerous!')
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self.__dict__.update(dict.fromkeys(listdir(self._path_)))
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def __repr__(self):
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return '<sysfs.Node "%s">' % self._path_
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def __str__(self):
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return basename(self._path_)
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def __setattr__(self, name, val):
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if name.startswith('_'):
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return object.__setattr__(self, name, val)
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path = realpath(join(self._path_, name))
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if isfile(path):
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with open(path, 'w') as fp:
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fp.write(val)
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else:
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raise RuntimeError('Cannot write to non-files.')
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def __getattribute__(self, name):
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if name.startswith('_'):
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return object.__getattribute__(self, name)
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path = realpath(join(self._path_, name))
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if isfile(path):
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with open(path, 'r') as fp:
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return fp.read().strip()
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elif isdir(path):
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return Node(path)
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def __setitem__(self, name, val):
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return setattr(self, name, val)
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def __getitem__(self, name):
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return getattr(self, name)
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def __iter__(self):
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return iter(getattr(self, name) for name in listdir(self._path_))
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sys = Node()
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