workspace/ksmserver/kcheckrunning.cpp

   1 /* This file is part of the KDE project
   2    Copyright (C) 2005 Lubos Lunak <l.lunak@kde.org>
   3
   4    This library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public
   6    License as published by the Free Software Foundation; either
   7    version 2 of the License, or (at your option) any later version.
   8
   9    This library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public License
  15    along with this library; see the file COPYING.LIB.  If not, write to
  16    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17    Boston, MA 02110-1301, USA.
  18 */
  19
  20 #include <X11/Xlib.h>
  21
  22 /*
  23  Return 0 when KDE is running, 1 when KDE is not running but it is possible
  24  to connect to X, 2 when it's not possible to connect to X.
  25 */
  26 int main()
  27     {
  28     Display* dpy = XOpenDisplay( NULL );
  29     if( dpy == NULL )
  30         return 2;
  31     Atom atom = XInternAtom( dpy, "_KDE_RUNNING", False );
  32     return XGetSelectionOwner( dpy, atom ) != None ? 0 : 1;
  33     }