python - 如何在 Python 中捕获系统挂起事件？

Question

我正在使用 ubuntu 12.04。有没有办法在 Python 中捕获挂起事件，即如果笔记本电脑要挂起，这样做......？捕获关闭事件的相同问题。

Answer 1

我认为最简单的方法是使用DBUS python接口并在“org.freedesktop.UPower”接口上监听“AboutToSleep”和/或“Sleeping”事件

Answer 2

如果有人偶然发现同样的问题，代码如下：

#!/usr/bin/env python

import dbus      # for dbus communication (obviously)
import gobject   # main loop
from dbus.mainloop.glib import DBusGMainLoop # integration into the main loop

def handle_resume_callback():
    print "System just resumed from hibernate or suspend"

def handle_suspend_callback():
    print "System about to hibernate or suspend"

DBusGMainLoop(set_as_default=True) # integrate into main loob
bus = dbus.SystemBus()             # connect to dbus system wide
bus.add_signal_receiver(           # defince the signal to listen to
    handle_resume_callback,            # name of callback function
    'Resuming',                        # singal name
    'org.freedesktop.UPower',          # interface
    'org.freedesktop.UPower'           # bus name
)

bus.add_signal_receiver(           # defince the signal to listen to
    handle_suspend_callback,            # name of callback function
    'Sleeping',                        # singal name
    'org.freedesktop.UPower',          # interface
    'org.freedesktop.UPower'           # bus name
)

loop = gobject.MainLoop()          # define mainloop
loop.run()                         # run main loop

Answer 3

您可以扩展此代码，它侦听来自 acpid 的事件，尝试仅打印它接收到的字符串并生成您想要的事件并查看字符串的样子。

s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect("/var/run/acpid.socket")
print "Connected to acpid"
while 1:
    for event in s.recv(4096).split('\n'):
        event=event.split(' ')
        if len(event)<2: continue
        print event
        if event[0]=='ac_adapter':
            if event[3]=='00000001': #plugged
                plugged() #Power plugged event
            else: #unplugged
                unplugged() #Power unplugged event
        elif event[0]=='button/power':
            power_button() #Power button pressed
        elif event[0]=='button/lid':
            if event[2]=='open':
                lid_open() #Laptop lid opened
            elif event[2]=='close':
                lid_close() #Laptop lid closed