xserver

xserver with xephyr scale patch
git clone https://git.neptards.moe/u3shit/xserver.git
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winclipboardwrappers.c (4930B)

      1 /*
      2  *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
      3  *Copyright (C) Colin Harrison 2005-2008
      4  *
      5  *Permission is hereby granted, free of charge, to any person obtaining
      6  * a copy of this software and associated documentation files (the
      7  *"Software"), to deal in the Software without restriction, including
      8  *without limitation the rights to use, copy, modify, merge, publish,
      9  *distribute, sublicense, and/or sell copies of the Software, and to
     10  *permit persons to whom the Software is furnished to do so, subject to
     11  *the following conditions:
     12  *
     13  *The above copyright notice and this permission notice shall be
     14  *included in all copies or substantial portions of the Software.
     15  *
     16  *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     17  *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     18  *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     19  *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
     20  *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
     21  *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     22  *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  *Except as contained in this notice, the name of the copyright holder(s)
     25  *and author(s) shall not be used in advertising or otherwise to promote
     26  *the sale, use or other dealings in this Software without prior written
     27  *authorization from the copyright holder(s) and author(s).
     28  *
     29  * Authors:	Harold L Hunt II
     30  *              Colin Harrison
     31  */
     32 
     33 #ifdef HAVE_XWIN_CONFIG_H
     34 #include <xwin-config.h>
     35 #endif
     36 
     37 #include "win.h"
     38 #include "dixstruct.h"
     39 
     40 /*
     41  * Local function prototypes
     42  */
     43 
     44 DISPATCH_PROC(winProcEstablishConnection);
     45 
     46 /*
     47  * Wrapper for internal EstablishConnection function.
     48  * Initializes internal clients that must not be started until
     49  * an external client has connected.
     50  */
     51 
     52 int
     53 winProcEstablishConnection(ClientPtr client)
     54 {
     55     int iReturn;
     56     static int s_iCallCount = 0;
     57     static unsigned long s_ulServerGeneration = 0;
     58 
     59     if (s_iCallCount == 0)
     60         winDebug("winProcEstablishConnection - Hello\n");
     61 
     62     /* Do nothing if clipboard is not enabled */
     63     if (!g_fClipboard) {
     64         ErrorF("winProcEstablishConnection - Clipboard is not enabled, "
     65                "returning.\n");
     66 
     67         /* Unwrap the original function, call it, and return */
     68         InitialVector[2] = winProcEstablishConnectionOrig;
     69         iReturn = (*winProcEstablishConnectionOrig) (client);
     70         winProcEstablishConnectionOrig = NULL;
     71         return iReturn;
     72     }
     73 
     74     /* Watch for server reset */
     75     if (s_ulServerGeneration != serverGeneration) {
     76         /* Save new generation number */
     77         s_ulServerGeneration = serverGeneration;
     78 
     79         /* Reset call count */
     80         s_iCallCount = 0;
     81     }
     82 
     83     /* Increment call count */
     84     ++s_iCallCount;
     85 
     86     /*
     87      * This procedure is only used for initialization.
     88      * We can unwrap the original procedure at this point
     89      * so that this function is no longer called until the
     90      * server resets and the function is wrapped again.
     91      */
     92     InitialVector[2] = winProcEstablishConnectionOrig;
     93 
     94     /*
     95      * Call original function and bail if it fails.
     96      * NOTE: We must do this first, since we need XdmcpOpenDisplay
     97      * to be called before we initialize our clipboard client.
     98      */
     99     iReturn = (*winProcEstablishConnectionOrig) (client);
    100     if (iReturn != 0) {
    101         ErrorF("winProcEstablishConnection - ProcEstablishConnection "
    102                "failed, bailing.\n");
    103         return iReturn;
    104     }
    105 
    106     /* Clear original function pointer */
    107     winProcEstablishConnectionOrig = NULL;
    108 
    109     /* Startup the clipboard client if clipboard mode is being used */
    110     if (g_fClipboard) {
    111         /*
    112          * NOTE: The clipboard client is started here for a reason:
    113          * 1) Assume you are using XDMCP (e.g. XWin -query %hostname%)
    114          * 2) If the clipboard client attaches during X Server startup,
    115          *    then it becomes the "magic client" that causes the X Server
    116          *    to reset if it exits.
    117          * 3) XDMCP calls KillAllClients when it starts up.
    118          * 4) The clipboard client is a client, so it is killed.
    119          * 5) The clipboard client is the "magic client", so the X Server
    120          *    resets itself.
    121          * 6) This repeats ad infinitum.
    122          * 7) We avoid this by waiting until at least one client (could
    123          *    be XDM, could be another client) connects, which makes it
    124          *    almost certain that the clipboard client will not connect
    125          *    until after XDM when using XDMCP.
    126          */
    127 
    128         /* Create the clipboard client thread */
    129         if (!winInitClipboard()) {
    130             ErrorF("winProcEstablishConnection - winClipboardInit "
    131                    "failed.\n");
    132             return iReturn;
    133         }
    134 
    135         ErrorF("winProcEstablishConnection - winInitClipboard returned.\n");
    136     }
    137 
    138     return iReturn;
    139 }