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112 lines
2.9 KiB
C++

/***************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (directui@nokia.com)
**
** This file is part of applauncherd
**
** If you have questions regarding the use of this file, please contact
** Nokia at directui@nokia.com.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation
** and appearing in the file LICENSE.LGPL included in the packaging
** of this file.
**
****************************************************************************/
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <cstdlib>
using std::atoi;
#include <iostream>
using std::cout;
using std::endl;
#include <list>
using std::list;
class WindowsMatchingPid
{
public:
WindowsMatchingPid(Display *display, Window wRoot, unsigned long pid)
: m_display(display)
, m_pid(pid)
{
// Get the PID property atom.
m_atomPID = XInternAtom(display, "_NET_WM_PID", False);
search(wRoot);
}
const list<Window> &result() const { return m_result; }
private:
Display *m_display;
unsigned long m_pid;
Atom m_atomPID;
list<Window> m_result;
void search(Window w)
{
// Get the PID for the current Window.
Atom type;
int format;
unsigned long nItems;
unsigned long bytesAfter;
unsigned char *propPID = 0;
if(Success == XGetWindowProperty(m_display, w, m_atomPID, 0, 1, False, XA_CARDINAL,
&type, &format, &nItems, &bytesAfter, &propPID))
{
if(propPID != 0)
{
// If the PID matches, add this window to the result set.
if(m_pid == *((unsigned long *)propPID))
m_result.push_back(w);
XFree(propPID);
}
}
// Recurse into child windows.
Window wRoot;
Window wParent;
Window *wChild;
unsigned numChildren;
if(XQueryTree(m_display, w, &wRoot, &wParent, &wChild, &numChildren) != 0)
{
for(unsigned i = 0; i < numChildren; i++)
search(wChild[i]);
}
}
};
int main(int argc, char **argv)
{
if(argc < 2) return EXIT_FAILURE;
const int pid = atoi(argv[1]);
// Start with the root window.
Display *display = XOpenDisplay(0);
WindowsMatchingPid match(display, XDefaultRootWindow(display), pid);
// Print the resulting window id's
const list<Window> &result = match.result();
for(list<Window>::const_iterator it = result.begin(); it != result.end(); it++)
cout << "0x" << std::hex << (unsigned long)(*it) << std::dec << endl;
return EXIT_SUCCESS;
}