问题描述
我正在尝试使用 X11 屏幕保护程序扩展客户端库检测自上次用户输入以来的时间.我定期调用 XScreenSaverQueryInfo 以获得空闲时间.我面临的问题是，每隔 20-30 秒，此调用报告的空闲时间将重置为 0.即使在此期间没有实际用户输入，也会发生这种情况.我对此感到非常困惑.我唯一的线索是，如果我卸载 gnome-screensaver，问题就会消失.我的问题是，gnome-screensaver 是否出于某种原因模拟了用户输入?我知道这听起来不太可能，如果确实如此，那肯定是 gnome-screensaver 的一个错误，但我现在想不出其他任何事情.有谁知道我可以在哪里找到有关 gnome-screensaver 的工作原理以及它如何影响 XScreenSaverQueryInfo 调用的更多信息，而无需实际阅读代码.我已经浏览了 gnome-screensaver home 上的信息，但找不到任何内容与我的问题相关.
I am trying to detect time since last user input using the X11 Screen Saver extension client library. I make periodic calls to XScreenSaverQueryInfo to get the idle time. The problem I am facing is that after every 20-30 seconds the idle time, as reported by this call, resets to 0. This happens even though there has been no actual user input in that time. I am totally puzzled by this. The only lead I have is that the problem disappears if I uninstall gnome-screensaver. My question is, does the gnome-screensaver simulate user inputs for some reason? I know it sounds unlikely, and if it does, it will most definitely be a bug with gnome-screensaver, but I cannot think of anything else right now. Does anyone know where I can find more information on how gnome-screensaver works and how it influences the XScreenSaverQueryInfo call without actually having to go through the code. I have gone through the info at gnome-screensaver home but could not find anything relevant to my issue.
更新:我从 dbus-monitor 得到以下输出.我该如何解释:
Update: I got the following output from dbus-monitor. How do I interpret this:
method call sender=:1.97538 -> dest=org.gnome.ScreenSaver serial=3 path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=SimulateUserActivity
我认为某些进程要求 gnome-screensaver 来模拟用户活动.或者，gnome-screensaver 是否向 dbus 发送 SimulateUserActivity 信号?如果是第一个，我怎样才能找出哪个进程要求 gnome-screensaver 这样做?
I think some process is asking gnome-screensaver to SimulateUserActivity. Or, is gnome-screensaver sending a SimulateUserActivity signal to dbus? If it is the first, how can I find out which process is asking gnome-screensaver to do that?
推荐答案
一旦您拥有 dbus 发送器(如 dbus-monitor 所示)，您可以执行以下操作:
Once you have the dbus sender (as shown on dbus-monitor there) you can do:
dbus-send --print-reply --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.GetConnectionUnixProcessID string:':1.97538'
插入实际的发件人.这为您提供了发送消息的 pid.
plugging in the actual sender. That gives you the pid that's sending the message.
然后说 pid 是 2144，你会这样做:
Then say the pid is 2144, you'd do:
cat /proc/2144/cmdline
作为查看程序内容的一种方式.
as one way to see what the program is.
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