Finding needle in haystack..

[Carsten Haitzler (The Rasterman)]

On Tue, 12 Sep 2006 09:53:43 +0100 Glynn Clements <glynn at gclements.plus.com>
babbled:

> 
> Carsten Haitzler (The Rasterman) wrote:
> 
> > > > The reason I asked the question I did was that one way to trickle that
> > > > information through to the window manager was:
> > > >   window manager looks up XID of window
> > > >   from XID we someway lookup the socket in use on that window
> > > >   from the socket we lookup process id
> > > >   from process id we look at the command line arguments to find the file
> > > 
> > > If you just want the command line arguments, try the WM_COMMAND
> > > property.  This property is supposed to contain the command line
> > > arguments that were used to run the program that owns the window.
> > > Unfortunately, I think it's deprecated.  On my system, xterm sets it but
> > > GIMP does not.  You might have to modify applications to set it.
> > 
> > gimp does - gtk apps changed how they do it - they set it on the client
> > leader window which doesnt get mapped/managed :) you can find it - but the
> > wm command wont help much in this case. he needs to map open fd's to file
> > paths - slight problem though is the app likely will open the file read it
> > then close the file handle - not keep it open, so u will miss the open fd :(
> 
> AFAICT, that isn't what the OP is trying to do. He's talking about
> getting the server's fd for the /tmp/.X11-unix socket through which
> Xlib connects to the server, scanning /proc/<X-server-pid>/fd to get
> the socket number, then scanning /proc/*/fd to find the client process
> which is on the other end of the connection.
> 
> The problem with using window properties alone is that the information
> can be forged; any client can set a property claiming that it has a
> particular (trusted) PID.
> 
> If an XID can be reliably mapped to a server-side fd, the rest of the
> process (reliably mapping that to a PID) is straightforward.

oh sure - it can be forged - and i can draw over the window border to repaint
it back to normal too so u wont see the "red" color or whatever - if you know
what you are doing... :)

-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler)    raster at rasterman.com
裸好多
Tokyo, Japan (東京 日本)