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/*
*Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
*Copyright (C) Colin Harrison 2005-2008
*
*Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
*"Software"), to deal in the Software without restriction, including
*without limitation the rights to use, copy, modify, merge, publish,
*distribute, sublicense, and/or sell copies of the Software, and to
*permit persons to whom the Software is furnished to do so, subject to
*the following conditions:
*
*The above copyright notice and this permission notice shall be
*included in all copies or substantial portions of the Software.
*
*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
*NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
*ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
*CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
*WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*Except as contained in this notice, the name of the copyright holder(s)
*and author(s) shall not be used in advertising or otherwise to promote
*the sale, use or other dealings in this Software without prior written
*authorization from the copyright holder(s) and author(s).
*
* Authors: Harold L Hunt II
* Colin Harrison
*/
#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"
#include "dixstruct.h"
/*
* Local function prototypes
*/
DISPATCH_PROC(winProcEstablishConnection);
/*
* References to external symbols
*/
extern Bool g_fClipboard;
/*
* Wrapper for internal EstablishConnection function.
* Initializes internal clients that must not be started until
* an external client has connected.
*/
int
winProcEstablishConnection(ClientPtr client)
{
int iReturn;
static int s_iCallCount = 0;
static unsigned long s_ulServerGeneration = 0;
if (s_iCallCount == 0)
winDebug("winProcEstablishConnection - Hello\n");
/* Do nothing if clipboard is not enabled */
if (!g_fClipboard) {
ErrorF("winProcEstablishConnection - Clipboard is not enabled, "
"returning.\n");
/* Unwrap the original function, call it, and return */
InitialVector[2] = winProcEstablishConnectionOrig;
iReturn = (*winProcEstablishConnectionOrig) (client);
winProcEstablishConnectionOrig = NULL;
return iReturn;
}
/* Watch for server reset */
if (s_ulServerGeneration != serverGeneration) {
/* Save new generation number */
s_ulServerGeneration = serverGeneration;
/* Reset call count */
s_iCallCount = 0;
}
/* Increment call count */
++s_iCallCount;
/*
* This procedure is only used for initialization.
* We can unwrap the original procedure at this point
* so that this function is no longer called until the
* server resets and the function is wrapped again.
*/
InitialVector[2] = winProcEstablishConnectionOrig;
/*
* Call original function and bail if it fails.
* NOTE: We must do this first, since we need XdmcpOpenDisplay
* to be called before we initialize our clipboard client.
*/
iReturn = (*winProcEstablishConnectionOrig) (client);
if (iReturn != 0) {
ErrorF("winProcEstablishConnection - ProcEstablishConnection "
"failed, bailing.\n");
return iReturn;
}
/* Clear original function pointer */
winProcEstablishConnectionOrig = NULL;
/* Startup the clipboard client if clipboard mode is being used */
if (g_fClipboard) {
/*
* NOTE: The clipboard client is started here for a reason:
* 1) Assume you are using XDMCP (e.g. XWin -query %hostname%)
* 2) If the clipboard client attaches during X Server startup,
* then it becomes the "magic client" that causes the X Server
* to reset if it exits.
* 3) XDMCP calls KillAllClients when it starts up.
* 4) The clipboard client is a client, so it is killed.
* 5) The clipboard client is the "magic client", so the X Server
* resets itself.
* 6) This repeats ad infinitum.
* 7) We avoid this by waiting until at least one client (could
* be XDM, could be another client) connects, which makes it
* almost certain that the clipboard client will not connect
* until after XDM when using XDMCP.
*/
/* Create the clipboard client thread */
if (!winInitClipboard()) {
ErrorF("winProcEstablishConnection - winClipboardInit "
"failed.\n");
return iReturn;
}
ErrorF("winProcEstablishConnection - winInitClipboard returned.\n");
}
return iReturn;
}
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