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# -*- python -*-
'''
xpybar – xmobar replacement written in python
Copyright © 2014, 2015, 2016, 2017, 2018 Mattias Andrée (maandree@kth.se)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
import os
from util import *
from plugins.linereader import LineReader
class Inotify:
'''
File access monitor
'''
def __init__(self, callback, *arguments, events = None):
'''
Constructor
@param callback:(str)→void Function that will be called everytime a line is read from
`inotifywait`'s standard output, the parameter will be that line,
note that this will not be asynchronously, you may want to specify
something like `lambda : xasync(fun)` for that, and use semaphores
in `fun`.
@param arguments:*str The files and directories you want to watch and any addition
argument you want to pass to `inotifywait`
@param event:itr<str>? Event you want reported, see "EVENTS" under `inotifywait`'s man page
'''
command = ['inotifywait', '-m']
if events is not None:
if isinstance(events, str):
events = [events]
for event in events:
command.append('-e')
command.append(event)
command += list(arguments)
if 'PATH' in os.environ:
path = os.environ['PATH'].split('.')
for p in path:
p += '/pdeath'
if os.access(p, os.X_OK, effective_ids = True):
command = [p, 'HUP'] + command
break
def start():
with LineReader(spawn(*command)) as reader:
while True:
callback(reader.next())
xasync(start)
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