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