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Hi !

Sometimes, I have an application running in Window and want to
know the PID. Is there a way I can get it somehow digging into
structures, if I know the Window ID (obtained by xwininfo) ?

Thx

<bunka.munka@yahoo.com> writes in comp.unix.solaris:
|Sometimes, I have an application running in Window and want to
|know the PID. Is there a way I can get it somehow digging into
|structures, if I know the Window ID (obtained by xwininfo) ?

Not really easily. (On most OS'es, it's a flat out no - on Solaris,
with Xsun, the X server knows the pid for each client in order to do the
IA process priority manipulations, so you can dig it out with debugger
magic, but that's not something you'ld want to include in a script or
program (though I have).)

The best way to do this would be get the applications you care about
to set the _NET_WM_PID property - see the Extended WM spec at:
http://standards.freedesktop.org/wm-...html#id2511832

--
Alan Coopersmith * alanc@alum.calberkeley.org * Alan.Coopersmith@Sun.COM
http://blogs.sun.com/alanc/ * http://people.freedesktop.org/~alanc/
http://del.icio.us/alanc/ * http://www.csua.berkeley.edu/~alanc/
Working for, but definitely not speaking for, Sun Microsystems, Inc.

bunka.munka@yahoo.com wrote:
> Sometimes, I have an application running in Window and want to
> know the PID. Is there a way I can get it somehow digging into
> structures, if I know the Window ID (obtained by xwininfo) ?

Who says the application is running on the local host? Who says
it's even running on an operating system that has the notion of
processes in the first place? All you really know is that it's
something which is interacting with the X server.

- Logan

<bunka.munka@yahoo.com> <bunka.munka@yahoo.com> wrote:
> Sometimes, I have an application running in Window and want to
> know the PID. Is there a way I can get it somehow digging into
> structures, if I know the Window ID (obtained by xwininfo) ?

How does xkill do that kind of stuff?

lg, Bernd
--
When emailing me, excuse my annoying spamfilter - it works for me.

Bernd Haug wrote:
> <bunka.munka@yahoo.com> <bunka.munka@yahoo.com> wrote:

>>Sometimes, I have an application running in Window and want to
>>know the PID. Is there a way I can get it somehow digging into
>>structures, if I know the Window ID (obtained by xwininfo) ?

> How does xkill do that kind of stuff?

I always assumed it tells the X server to kill the window.
The X server then kills the window and breaks the client's
connection. The client then exits when it senses it has
lost the connection to the X server.

I may not have the details right, but the point is that as
I understand it, the client chooses to exit because it realizes
its connection to the X server has been lost.

- Logan

Bernd Haug <haug@berndhaug.net> writes in comp.unix.solaris:
|<bunka.munka@yahoo.com> <bunka.munka@yahoo.com> wrote:
|> Sometimes, I have an application running in Window and want to
|> know the PID. Is there a way I can get it somehow digging into
|> structures, if I know the Window ID (obtained by xwininfo) ?
|
|How does xkill do that kind of stuff?

It doesn't - it tells the X server to close the connection to the
client, which causes many clients, but not all, to exit.

--
Alan Coopersmith * alanc@alum.calberkeley.org * Alan.Coopersmith@Sun.COM
http://blogs.sun.com/alanc/ * http://people.freedesktop.org/~alanc/
http://del.icio.us/alanc/ * http://www.csua.berkeley.edu/~alanc/
Working for, but definitely not speaking for, Sun Microsystems, Inc.

In article <dlqtg9$ql$2@agate.berkeley.edu>, alanc@alum.calberkeley.org
says...
> <bunka.munka@yahoo.com> writes in comp.unix.solaris:
> |Sometimes, I have an application running in Window and want to
> |know the PID. Is there a way I can get it somehow digging into
> |structures, if I know the Window ID (obtained by xwininfo) ?
>
> Not really easily. (On most OS'es, it's a flat out no - on Solaris,
> with Xsun, the X server knows the pid for each client in order to do the
> IA process priority manipulations, so you can dig it out with debugger
> magic, but that's not something you'ld want to include in a script or
> program (though I have).)
>
> The best way to do this would be get the applications you care about
> to set the _NET_WM_PID property - see the Extended WM spec at:
> http://standards.freedesktop.org/wm-...html#id2511832
>
>
I am familiar with the most kernel structures (actually i am digging
with adb into crash files many times), but didn't find any appropriate.

Application are 3rd party, all runs on a host itself. They're very
complex (about 400-500 java processes).
Most of the time i am successfull finding one (with truss -p <assume
pid> and moving mouse over that window produce a massive
lwp_mutexes...), but I am pretty sure XServer has that structure
somewhere, if not in their temporary files, it must have some kernel
process window tree...

thx anyway

<bunka.munka@email.si> writes in comp.unix.solaris:
|In article <dlqtg9$ql$2@agate.berkeley.edu>, alanc@alum.calberkeley.org
|says...
|> <bunka.munka@yahoo.com> writes in comp.unix.solaris:
|> |Sometimes, I have an application running in Window and want to
|> |know the PID. Is there a way I can get it somehow digging into
|> |structures, if I know the Window ID (obtained by xwininfo) ?
|>
|> Not really easily. (On most OS'es, it's a flat out no - on Solaris,
|> with Xsun, the X server knows the pid for each client in order to do the
|> IA process priority manipulations, so you can dig it out with debugger
|> magic, but that's not something you'ld want to include in a script or
|> program (though I have).)
|>
|> The best way to do this would be get the applications you care about
|> to set the _NET_WM_PID property - see the Extended WM spec at:
|> http://standards.freedesktop.org/wm-...html#id2511832
|>
|>
|I am familiar with the most kernel structures (actually i am digging
|with adb into crash files many times), but didn't find any appropriate.
|
|Application are 3rd party, all runs on a host itself. They're very
|complex (about 400-500 java processes).
|Most of the time i am successfull finding one (with truss -p <assume
|pid> and moving mouse over that window produce a massive
|lwp_mutexes...), but I am pretty sure XServer has that structure
|somewhere, if not in their temporary files, it must have some kernel
|process window tree...

As I said, the X servers on Solaris do have that in memory, but there's
no way to get it out other than via poking in the X server process
memory with a debugger or similar tool. It's in the user-space process,
not the kernel, and you'ld need the X server structure definitions from
the source code, since they're not in header files shipped with the
system.

--
Alan Coopersmith * alanc@alum.calberkeley.org * Alan.Coopersmith@Sun.COM
http://blogs.sun.com/alanc/ * http://people.freedesktop.org/~alanc/
http://del.icio.us/alanc/ * http://www.csua.berkeley.edu/~alanc/
Working for, but definitely not speaking for, Sun Microsystems, Inc.