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/*
* Copyright (C) 2004 Girish Ramakrishnan All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// $Id: tdedocker.cpp,v 1.24 2005/02/04 10:25:46 cs19713 Exp $
#include <tqdir.h>
#include <tqfile.h>
#include <tqtextcodec.h>
#include <tqtextstream.h>
#include <tqtimer.h>
#include <tqstring.h>
#include <tdecmdlineargs.h>
#include <tdeconfig.h>
#include <tdelocale.h>
#include "trace.h"
#include "traylabelmgr.h"
#include "tdedocker.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#define TMPFILE_PREFIX TQString("/tmp/tdedocker.")
TDEDocker::TDEDocker()
: TDEApplication(), mTrayLabelMgr(NULL), firstSaveState(true)
{
INIT_TRACE();
/*
* Detect and transfer control to previous instance (if one exists)
* _TDEDOCKER_RUNNING is a X Selection. We start out by trying to locate the
* selection owner. If someone else owns it, transfer control to that
* instance of TDEDocker
*/
Display *display = TQPaintDevice::x11AppDisplay();
Atom tdedocker = XInternAtom(display, "_TDEDOCKER_RUNNING", False);
Window prev_instance = XGetSelectionOwner(display, tdedocker);
if (prev_instance == None)
{
if (TDEApplication::kApplication()->isRestored())
{
// Required so that the saved config is correctly loaded
// (see TrayLabelMgr::doRestoreSession() for usage)
TDEApplication::kApplication()->sessionConfig();
}
mSelectionOwner = XCreateSimpleWindow(display, tqt_xrootwin(), 1, 1, 1, 1, 1, 1, 1);
XSetSelectionOwner(display, tdedocker, mSelectionOwner, CurrentTime);
TRACE("Selection owner set to 0x%x", (unsigned) mSelectionOwner);
mTrayLabelMgr = TrayLabelMgr::instance();
}
else
notifyPreviousInstance(prev_instance); // does not return
}
void TDEDocker::notifyPreviousInstance(Window prevInstance)
{
Display *display = TQPaintDevice::x11AppDisplay();
TRACE("Notifying previous instance [%x]", (unsigned) prevInstance);
// Dump all arguments in temporary file
TQFile f(TMPFILE_PREFIX + TQString().setNum(getpid()));
if (!f.open(IO_WriteOnly)) return;
TQTextStream s(&f);
// Its normal to use TDEDocker in startup scripts. We could be getting restored
// from a session at the same time, so in such case pass along the info.
if (isRestored())
{
s << TDECmdLineArgs::appName() << " --restore-internal";
}
else
{
TDECmdLineArgs *args = TDECmdLineArgs::parsedArgs();
s << TDECmdLineArgs::appName();
for (int i = 0; i < args->count(); i++)
{
s << " " << args->arg(i);
}
}
f.close();
/*
* Now tell our previous instance that we came to pass. Actually, it can
* figure it out itself using PropertyNotify events but this is a lot nicer
*/
XClientMessageEvent dock_event;
memset(&dock_event, 0, sizeof(XClientMessageEvent));
dock_event.display = display;
dock_event.window = prevInstance;
dock_event.send_event = True;
dock_event.type = ClientMessage;
dock_event.message_type = 0x220679; // it all started this day
dock_event.format = 8;
dock_event.data.l[0] = 0xBABE; // love letter ;)
dock_event.data.l[1] = getpid();
XSendEvent(display, prevInstance, False, 0, (XEvent *) &dock_event);
XSync(display, False);
::exit(0);
}
/*
* The X11 Event filter called by TQt. Look out for ClientMessage events from
* our new instance
*/
bool TDEDocker::x11EventFilter(XEvent * event)
{
if (event->type == ClientMessage)
{
// look for requests from a new instance of tdedocker
XClientMessageEvent *client = (XClientMessageEvent *) event;
if (!(client->message_type == 0x220679 && client->data.l[0] == 0xBABE))
return FALSE;
TRACE("ClientMessage from PID=%ld. SelOwn=0x%x",
client->data.l[1], (unsigned) mSelectionOwner);
char tmp[50];
struct stat buf;
sprintf(tmp, TQString(TMPFILE_PREFIX+"%ld").local8Bit(), client->data.l[1]);
if (stat(tmp, &buf) || (getuid()!=buf.st_uid))
{
/*
* We make sure that the owner of this process and the owner of the file
* are the same. This will prevent someone from executing arbitrary
* programs by sending client message. Of course, you can send a message
* only if you are authenticated to the X session and have permission to
* create files in TMPFILE_PREFIX. So this code is there just for the
* heck of it.
*/
TRACE("User %i is trying something fishy...", buf.st_uid);
unlink(tmp);
return TRUE;
}
TQFile f(tmp);
if (!f.open(IO_ReadOnly)) return TRUE;
TQTextStream s(&f);
TQStringList argv;
while (!s.atEnd()) { TQString x; s >> x; argv += x; }
f.close();
unlink(tmp); // delete the tmp file
mTrayLabelMgr->processCommand(argv);
return TRUE;
}
else
{
if (mTrayLabelMgr->x11EventFilter(event))
{
return true;
}
return TDEApplication::x11EventFilter(event);
}
}
#include "tdedocker.moc"
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