1/***********************************************************
2
3Copyright 1987, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26
27                        All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Digital not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45******************************************************************/
46
47/*
48 * Copyright (c) 2000 by The XFree86 Project, Inc.
49 *
50 * Permission is hereby granted, free of charge, to any person obtaining a
51 * copy of this software and associated documentation files (the "Software"),
52 * to deal in the Software without restriction, including without limitation
53 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
54 * and/or sell copies of the Software, and to permit persons to whom the
55 * Software is furnished to do so, subject to the following conditions:
56 *
57 * The above copyright notice and this permission notice shall be included in
58 * all copies or substantial portions of the Software.
59 *
60 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
61 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
62 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
63 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
64 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
65 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
66 * OTHER DEALINGS IN THE SOFTWARE.
67 *
68 * Except as contained in this notice, the name of the copyright holder(s)
69 * and author(s) shall not be used in advertising or otherwise to promote
70 * the sale, use or other dealings in this Software without prior written
71 * authorization from the copyright holder(s) and author(s).
72 */
73
74#ifdef HAVE_DIX_CONFIG_H
75#include <dix-config.h>
76#endif
77
78#ifdef HAVE_XORG_CONFIG_H
79#include <xorg-config.h>
80#include "xf86Extensions.h"
81#endif
82
83#ifdef HAVE_DMX_CONFIG_H
84#include <dmx-config.h>
85#undef XV
86#undef DBE
87#undef SCREENSAVER
88#undef RANDR
89#undef DAMAGE
90#undef COMPOSITE
91#undef MITSHM
92#endif
93
94#ifdef HAVE_XNEST_CONFIG_H
95#include <xnest-config.h>
96#undef COMPOSITE
97#undef DPMSExtension
98#endif
99
100#include "misc.h"
101#include "extension.h"
102#include "extinit.h"
103#include "micmap.h"
104#include "os.h"
105#include "globals.h"
106
107#include "miinitext.h"
108
109/* List of built-in (statically linked) extensions */
110static const ExtensionModule staticExtensions[] = {
111    {GEExtensionInit, "Generic Event Extension", &noGEExtension},
112    {ShapeExtensionInit, "SHAPE", NULL},
113#ifdef MITSHM
114    {ShmExtensionInit, "MIT-SHM", &noMITShmExtension},
115#endif
116    {XInputExtensionInit, "XInputExtension", NULL},
117#ifdef XTEST
118    {XTestExtensionInit, "XTEST", &noTestExtensions},
119#endif
120    {BigReqExtensionInit, "BIG-REQUESTS", NULL},
121    {SyncExtensionInit, "SYNC", NULL},
122    {XkbExtensionInit, "XKEYBOARD", NULL},
123    {XCMiscExtensionInit, "XC-MISC", NULL},
124#ifdef XCSECURITY
125    {SecurityExtensionInit, "SECURITY", &noSecurityExtension},
126#endif
127#ifdef PANORAMIX
128    {PanoramiXExtensionInit, "XINERAMA", &noPanoramiXExtension},
129#endif
130    /* must be before Render to layer DisplayCursor correctly */
131    {XFixesExtensionInit, "XFIXES", &noXFixesExtension},
132#ifdef XF86BIGFONT
133    {XFree86BigfontExtensionInit, "XFree86-Bigfont", &noXFree86BigfontExtension},
134#endif
135    {RenderExtensionInit, "RENDER", &noRenderExtension},
136#ifdef RANDR
137    {RRExtensionInit, "RANDR", &noRRExtension},
138#endif
139#ifdef COMPOSITE
140    {CompositeExtensionInit, "COMPOSITE", &noCompositeExtension},
141#endif
142#ifdef DAMAGE
143    {DamageExtensionInit, "DAMAGE", &noDamageExtension},
144#endif
145#ifdef SCREENSAVER
146    {ScreenSaverExtensionInit, "MIT-SCREEN-SAVER", &noScreenSaverExtension},
147#endif
148#ifdef DBE
149    {DbeExtensionInit, "DOUBLE-BUFFER", &noDbeExtension},
150#endif
151#ifdef XRECORD
152    {RecordExtensionInit, "RECORD", &noTestExtensions},
153#endif
154#ifdef DPMSExtension
155    {DPMSExtensionInit, "DPMS", &noDPMSExtension},
156#endif
157#ifdef PRESENT
158    {present_extension_init, "Present", NULL},
159#endif
160#ifdef DRI3
161    {dri3_extension_init, "DRI3", NULL},
162#endif
163#ifdef RES
164    {ResExtensionInit, "X-Resource", &noResExtension},
165#endif
166#ifdef XV
167    {XvExtensionInit, "XVideo", &noXvExtension},
168    {XvMCExtensionInit, "XVideo-MotionCompensation", &noXvExtension},
169#endif
170#ifdef XSELINUX
171    {SELinuxExtensionInit, "SELinux", &noSELinuxExtension},
172#endif
173#ifdef GLXEXT
174    {GlxExtensionInit, "GLX", &noGlxExtension},
175#endif
176};
177
178void
179ListStaticExtensions(void)
180{
181    const ExtensionModule *ext;
182    int i;
183
184    ErrorF(" Only the following extensions can be run-time enabled/disabled:\n");
185    for (i = 0; i < ARRAY_SIZE(staticExtensions); i++) {
186        ext = &staticExtensions[i];
187        if (ext->disablePtr != NULL) {
188            ErrorF("\t%s\n", ext->name);
189        }
190    }
191}
192
193Bool
194EnableDisableExtension(const char *name, Bool enable)
195{
196    const ExtensionModule *ext;
197    int i;
198
199    for (i = 0; i < ARRAY_SIZE(staticExtensions); i++) {
200        ext = &staticExtensions[i];
201        if (strcasecmp(name, ext->name) == 0) {
202            if (ext->disablePtr != NULL) {
203                *ext->disablePtr = !enable;
204                return TRUE;
205            }
206            else {
207                /* Extension is always on, impossible to disable */
208                return enable;  /* okay if they wanted to enable,
209                                   fail if they tried to disable */
210            }
211        }
212    }
213
214    return FALSE;
215}
216
217void
218EnableDisableExtensionError(const char *name, Bool enable)
219{
220    const ExtensionModule *ext;
221    int i;
222    Bool found = FALSE;
223
224    for (i = 0; i < ARRAY_SIZE(staticExtensions); i++) {
225        ext = &staticExtensions[i];
226        if ((strcmp(name, ext->name) == 0) && (ext->disablePtr == NULL)) {
227            ErrorF("[mi] Extension \"%s\" can not be disabled\n", name);
228            found = TRUE;
229            break;
230        }
231    }
232    if (found == FALSE) {
233        ErrorF("[mi] Extension \"%s\" is not recognized\n", name);
234        /* Disabling a non-existing extension is a no-op anyway */
235        if (enable == FALSE)
236            return;
237    }
238    ListStaticExtensions();
239}
240
241static ExtensionModule *ExtensionModuleList = NULL;
242static int numExtensionModules = 0;
243
244static void
245AddStaticExtensions(void)
246{
247    static Bool listInitialised = FALSE;
248
249    if (listInitialised)
250        return;
251    listInitialised = TRUE;
252
253    /* Add built-in extensions to the list. */
254    LoadExtensionList(staticExtensions, ARRAY_SIZE(staticExtensions), TRUE);
255}
256
257void
258InitExtensions(int argc, char *argv[])
259{
260    int i;
261    ExtensionModule *ext;
262
263    AddStaticExtensions();
264
265    for (i = 0; i < numExtensionModules; i++) {
266        ext = &ExtensionModuleList[i];
267        if (ext->initFunc != NULL &&
268            (ext->disablePtr == NULL || !*ext->disablePtr)) {
269            LogMessageVerb(X_INFO, 3, "Initializing extension %s\n",
270                           ext->name);
271
272            (ext->initFunc) ();
273        }
274    }
275}
276
277static ExtensionModule *
278NewExtensionModuleList(int size)
279{
280    ExtensionModule *save = ExtensionModuleList;
281    int n;
282
283    /* Sanity check */
284    if (!ExtensionModuleList)
285        numExtensionModules = 0;
286
287    n = numExtensionModules + size;
288    ExtensionModuleList = reallocarray(ExtensionModuleList, n,
289                                       sizeof(ExtensionModule));
290    if (ExtensionModuleList == NULL) {
291        ExtensionModuleList = save;
292        return NULL;
293    }
294    else {
295        numExtensionModules += size;
296        return ExtensionModuleList + (numExtensionModules - size);
297    }
298}
299
300void
301LoadExtensionList(const ExtensionModule ext[], int size, Bool builtin)
302{
303    ExtensionModule *newext;
304    int i;
305
306    /* Make sure built-in extensions get added to the list before those
307     * in modules. */
308    AddStaticExtensions();
309
310    if (!(newext = NewExtensionModuleList(size)))
311        return;
312
313    for (i = 0; i < size; i++, newext++) {
314        newext->name = ext[i].name;
315        newext->initFunc = ext[i].initFunc;
316        newext->disablePtr = ext[i].disablePtr;
317    }
318}
319