> > Given a Window (ex. Window w, from an event or somewhere else) is it
> > possible to determine the program that owns that window?
> > To be exact, I want the pid of the process owing the window.
>
> in pure X... you can't. end of story. Now.. if clients were to put
> properties on their windows with machine names, PID's etc... that
> would help
Thanks for that rather discourageing answer... :-(
> (I'd point you to a little handy LD_PRELOAD tool called ehack - it's
> in enlightenment CVS under the e17/apps/e tree. it's an LD_PRELOAD
> library that forces an X app to put many properties on their top-level
> windows. one of these is their PID) :)
I will take a look at that. Thanks.
> I also think that the EWMH hints specify a PID property - but its not
> enforced.
I have been looking at that, but not many windows sets that hint.
I better tell the whole story behind my question (so others might think
of a way around the problem):
I want to build a windowmanager (just for fun, not anything big, but
just a light version of blackbox or something like that).
I have a list of programs that the user can execute by pressing a key.
When a key is pressed I do the following:
pid_t *pid = (pid_t *) malloc( sizeof( pid_t ) );
if( !pid )
return;
if( !(*pid = fork()) ) {
setsid();
execvp( cmd, NULL );
} else
processes = list_insert( processes, pid );
I keep a list of processes.
Now when the window for that command (cmd) comes up, I want to make the
connection between the pid and the window. But in a CreateNotify event
all I get is a window. I can't seem to make the connection between what
window belongs to what process.
Martin Ehmsen
--
How we do it ...
Geometers do it with involutions.
Geometres do it symmetrically.
Graph theorists do it in four colours.
Hilbert spacers do it orthogonally.
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