Hi,
> >I tried your example because I don't know the _NET_WM_PID property
> >and was interested in it. Unfortunately the call to XGetWindowProperty()
> >never filled the &prop data. Your code is checking against the return
> >code of XGetWindowProperty() which is fine but prop equals to (nil) in
> >all my tests. I was using metacity as suggested windowmanger.
> >
> >Do you have any idea why it fails ?
> >
> >The window Id which is required of course is obtained from a
> >"xwininfo" call. I passed the information from this command to
>
> Using this (removed the uid stuff) works here:
>
> [EMAIL PROTECTED] fer]$ gcc test.c -L/usr/X11R6/lib/ -I/usr/X11R6/include/ -lX11 -o
> test
> [EMAIL PROTECTED] fer]$ xwininfo
>
> xwininfo: Please select the window about which you
> would like information by clicking the
> mouse in that window.
>
> xwininfo: Window id: 0x1e00012 "[EMAIL PROTECTED]:~"
> [...]
> [EMAIL PROTECTED] fer]$ ./a.out 0x1e00012
> pid of window 0x1e00012 = 24109
Hmm, yes I see, I did it the same way but it doesn't work for me.
The code I use is as follows:
----snip----
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <X11/Xfuncs.h>
#include <X11/Xutil.h>
#include <stdio.h>
#include <ctype.h>
#include <X11/Xatom.h>
#include <X11/Xmu/WinUtil.h>
int main (int argc, char*argv[]) {
Atom atom,actual_type;
Display *dpy;
int screen;
char *atom_name;
int actual_format;
unsigned long nitems;
unsigned long bytes_after;
unsigned char *prop;
int status;
int pid;
Window w=0;
dpy = XOpenDisplay((char*)getenv("DISPLAY"));
screen = DefaultScreen(dpy);
if (argc!=2) {
printf("Usage %s window-id\n",argv[0]);
exit(-1);
}
sscanf(argv[1],"0x%x",(unsigned int*)(&w));
atom = XInternAtom(dpy, "_NET_WM_PID", True);
atom_name = XGetAtomName (dpy,atom);
status = XGetWindowProperty(
dpy, w, atom, 0, 1024,
False, AnyPropertyType,
&actual_type,
&actual_format, &nitems,
&bytes_after,
&prop
);
if (status!=0) {
printf("Cannot get _NET_WM_PID");
exit(-2);
}
if (! prop) {
printf ("No properties\n");
exit (-3);
}
pid = prop[1] * 256;
pid += prop[0];
printf("pid of window 0x%x = %d\n",(unsigned int)w,pid);
return 0;
}
----snap---
gcc id.c -L/usr/X11R6/lib/ -I/usr/X11R6/include/ -lX11 -o bla
I'm running XFree86 Version 4.3.99.902 (4.4.0 RC 2) on kernel
2.6.4-6-default.
any ideas ?
Regards
Marcus
--
Public Key available
----------------------------------------------------
Marcus Schäfer (Res. & Dev.) SUSE LINUX AG
Tel: 0911-740 53 0 Maxfeldstrasse 5
FAX: 0911-741 77 55 D-90409 Nürnberg
http://www.suse.de Germany
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