CODEWITHSUNDEEP
linuxprocessxlibxorgxserver
Error
Error

Reputation: 830

does Xlib have any library call for Window associated process ID?

goal: is to collect information about user interactive program in Tracking app.

most efficient way is through process ID. the only way i can think of is getting Xlib Window associated process ID, does other ways around?

going through documentation, and source code, no clue for Window associated process ID attribute, maybe Xlib doesn't keep PID, or does it?

non efficient solution is through Window name attribute.

Upvotes: 0

Views: 408

Answers (2)

alanc
alanc

Reputation: 4170

Xlib doesn't keep process ids - it was designed to work on a variety of OS'es with different process abstractions, and across networks, where a pid on one machine isn't very useful on another machine.

But since most X applications today are being run on Unix-like machines and displayed locally, not over the network, many modern toolkits adopted a convention of storing the process id in a property on the window of that application. See the _NET_WM_PID section of the Extended Window Manager Hints specification for details.

Upvotes: 1

user149341
user149341

Reputation:

The X server doesn't have that information. In fact, there may not even be a PID available -- clients can connect to an X server over the network.

If all you need to do is identify what program is being used, though, you could look at the WM_CLASS window property. This property contains a pair of strings that are used to identify the window to the window manager, and usually includes the name of the application.

Upvotes: 1

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