/* *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); /* * 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; }