在 Unix 上的 Python 中，确定我是否正在使用我的计算机？还是闲着？

发布于 2024-11-06 00:55:13 字数 112 浏览 4 评论 0 原文

我想编写一个脚本来在后台进行大量网络上传。但是，我希望它在我使用计算机时暂停（通过检测网络活动或键盘活动或者我不闲着）。

检测我正在使用 Unix 上的 Python 计算机的最佳方法是什么？

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画骨成沙 2024-11-13 00:55:13

使用 X11/XScreenSaver 获取空闲时间的 Unixy 解决方案：（

#!/usr/bin/python
import ctypes
import os

class XScreenSaverInfo( ctypes.Structure):
  """ typedef struct { ... } XScreenSaverInfo; """
  _fields_ = [('window',      ctypes.c_ulong), # screen saver window
              ('state',       ctypes.c_int),   # off,on,disabled
              ('kind',        ctypes.c_int),   # blanked,internal,external
              ('since',       ctypes.c_ulong), # milliseconds
              ('idle',        ctypes.c_ulong), # milliseconds
              ('event_mask',  ctypes.c_ulong)] # events

xlib = ctypes.cdll.LoadLibrary('libX11.so')
display = xlib.XOpenDisplay(os.environ['DISPLAY'])
xss = ctypes.cdll.LoadLibrary('libXss.so.1')
xss.XScreenSaverAllocInfo.restype = ctypes.POINTER(XScreenSaverInfo)
xssinfo = xss.XScreenSaverAllocInfo()
xss.XScreenSaverQueryInfo(display, xlib.XDefaultRootWindow(display), xssinfo)

print "idle: %d ms" % xssinfo.contents.idle

# cleanup
xss.XCloseDisplay(display)
xss.XFree(xssinfo)

来自“Python 中的 X11 空闲时间和聚焦窗口”，最初位于 thp.io，现在显然只有 GitHub要点仍然存在。）

清理部分在后来的编辑中添加到代码中由另一个用户以便可以定期调用它。

正如他们引用的答案的评论中所指出的，请注意，您还应该对函数调用进行正确的返回代码检查，以避免当 X 显示和其他初始化由于某种原因失败时程序异常终止。

Unixy solution using X11/XScreenSaver to get idle time:

#!/usr/bin/python
import ctypes
import os

class XScreenSaverInfo( ctypes.Structure):
  """ typedef struct { ... } XScreenSaverInfo; """
  _fields_ = [('window',      ctypes.c_ulong), # screen saver window
              ('state',       ctypes.c_int),   # off,on,disabled
              ('kind',        ctypes.c_int),   # blanked,internal,external
              ('since',       ctypes.c_ulong), # milliseconds
              ('idle',        ctypes.c_ulong), # milliseconds
              ('event_mask',  ctypes.c_ulong)] # events

xlib = ctypes.cdll.LoadLibrary('libX11.so')
display = xlib.XOpenDisplay(os.environ['DISPLAY'])
xss = ctypes.cdll.LoadLibrary('libXss.so.1')
xss.XScreenSaverAllocInfo.restype = ctypes.POINTER(XScreenSaverInfo)
xssinfo = xss.XScreenSaverAllocInfo()
xss.XScreenSaverQueryInfo(display, xlib.XDefaultRootWindow(display), xssinfo)

print "idle: %d ms" % xssinfo.contents.idle

# cleanup
xss.XCloseDisplay(display)
xss.XFree(xssinfo)

(From "X11 idle time and focused window in Python", originally found on thp.io, now apparently only the GitHub gist by the same author survives.)

A cleanup section was added to the code in a later edit by another user so that it can be called periodically.

As noted in a comment to the answer they reference, note that you should also do proper return code checking on function calls to avoid ungraceful program termination when X display and other initializations fail for some reason.

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