1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
*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;
}
|
