dix: Remove extension aliases

This appears to be essentially unused. The only known client-side
library for the SELinux extension is xcb, which does not look for the
name "Flask". The "SGI-GLX" alias for GLX appears to be a bit of
superstition at this point, NVIDIA's driver does not expose it and Mesa
does not check for it.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Acked-by: Keith Packard <keithp@keithp.com>

Xext/xselinux_ext.c

@@ -714,6 +714,4 @@ SELinuxExtensionInit(void)
                             SELinuxNumberEvents, SELinuxNumberErrors,
                             ProcSELinuxDispatch, SProcSELinuxDispatch,
                             SELinuxResetProc, StandardMinorOpcode);
-
-    AddExtensionAlias("Flask", extEntry);
 }

dix/extension.c

@@ -95,8 +95,6 @@ AddExtension(const char *name, int NumEvents, int NumErrors,
         return NULL;
     }
     ext->name = strdup(name);
-    ext->num_aliases = 0;
-    ext->aliases = (const char **) NULL;
     if (!ext->name) {
         dixFreePrivates(ext->devPrivates, PRIVATE_EXTENSION);
         free(ext);
@@ -144,42 +142,15 @@ AddExtension(const char *name, int NumEvents, int NumErrors,
     return ext;
 }
 
-Bool
-AddExtensionAlias(const char *alias, ExtensionEntry * ext)
-{
-    char *name;
-    const char **aliases;
-
-    if (!ext)
-        return FALSE;
-    aliases = reallocarray(ext->aliases, ext->num_aliases + 1, sizeof(char *));
-    if (!aliases)
-        return FALSE;
-    ext->aliases = aliases;
-    name = strdup(alias);
-    if (!name)
-        return FALSE;
-    ext->aliases[ext->num_aliases] = name;
-    ext->num_aliases++;
-    return TRUE;
-}
-
 static int
 FindExtension(const char *extname, int len)
 {
-    int i, j;
+    int i;
 
     for (i = 0; i < NumExtensions; i++) {
         if ((strlen(extensions[i]->name) == len) &&
             !strncmp(extname, extensions[i]->name, len))
             break;
-        for (j = extensions[i]->num_aliases; --j >= 0;) {
-            if ((strlen(extensions[i]->aliases[j]) == len) &&
-                !strncmp(extname, extensions[i]->aliases[j], len))
-                break;
-        }
-        if (j >= 0)
-            break;
     }
     return ((i == NumExtensions) ? -1 : i);
 }
@@ -223,16 +194,13 @@ StandardMinorOpcode(ClientPtr client)
 void
 CloseDownExtensions(void)
 {
-    int i, j;
+    int i;
 
     for (i = NumExtensions - 1; i >= 0; i--) {
         if (extensions[i]->CloseDown)
             extensions[i]->CloseDown(extensions[i]);
         NumExtensions = i;
         free((void *) extensions[i]->name);
-        for (j = extensions[i]->num_aliases; --j >= 0;)
-            free((void *) extensions[i]->aliases[j]);
-        free(extensions[i]->aliases);
         dixFreePrivates(extensions[i]->devPrivates, PRIVATE_EXTENSION);
         free(extensions[i]);
     }
@@ -294,7 +262,7 @@ ProcListExtensions(ClientPtr client)
     buffer = NULL;
 
     if (NumExtensions) {
-        int i, j;
+        int i;
 
         for (i = 0; i < NumExtensions; i++) {
             /* call callbacks to find out whether to show extension */
@@ -302,9 +270,7 @@ ProcListExtensions(ClientPtr client)
                 continue;
 
             total_length += strlen(extensions[i]->name) + 1;
-            reply.nExtensions += 1 + extensions[i]->num_aliases;
-            for (j = extensions[i]->num_aliases; --j >= 0;)
-                total_length += strlen(extensions[i]->aliases[j]) + 1;
+            reply.nExtensions += 1;
         }
         reply.length = bytes_to_int32(total_length);
         buffer = bufptr = malloc(total_length);
@@ -319,11 +285,6 @@ ProcListExtensions(ClientPtr client)
             *bufptr++ = len = strlen(extensions[i]->name);
             memmove(bufptr, extensions[i]->name, len);
             bufptr += len;
-            for (j = extensions[i]->num_aliases; --j >= 0;) {
-                *bufptr++ = len = strlen(extensions[i]->aliases[j]);
-                memmove(bufptr, extensions[i]->aliases[j], len);
-                bufptr += len;
-            }
         }
     }
     WriteReplyToClient(client, sizeof(xListExtensionsReply), &reply);

glx/glxext.c

@@ -424,10 +424,6 @@ GlxExtensionInit(void)
         FatalError("__glXExtensionInit: AddExtensions failed\n");
         return;
     }
-    if (!AddExtensionAlias(GLX_EXTENSION_ALIAS, extEntry)) {
-        ErrorF("__glXExtensionInit: AddExtensionAlias failed\n");
-        return;
-    }
 
     __glXErrorBase = extEntry->errorBase;
     __glXEventBase = extEntry->eventBase;

hw/dmx/glxProxy/glxext.c

@@ -323,12 +323,6 @@ GlxExtensionInit(void)
         FatalError("__glXExtensionInit: AddExtensions failed\n");
         return;
     }
-    /*
-       if (!AddExtensionAlias(GLX_EXTENSION_ALIAS, extEntry)) {
-       ErrorF("__glXExtensionInit: AddExtensionAlias failed\n");
-       return;
-       }
-     */
 
     __glXerrorBase = extEntry->errorBase;
     __glXBadContext = extEntry->errorBase + GLXBadContext;

include/extnsionst.h

@@ -64,8 +64,6 @@ typedef struct _ExtensionEntry {
     int eventLast;
     int errorBase;
     int errorLast;
-    int num_aliases;
-    const char **aliases;
     void *extPrivate;
     unsigned short (*MinorOpcode) (     /* called for errors */
                                       ClientPtr /* client */ );
@@ -95,10 +93,6 @@ AddExtension(const char * /*name */ ,
              unsigned short (* /*MinorOpcodeProc */ )(ClientPtr /*client */ )
     );
 
-extern _X_EXPORT Bool
-AddExtensionAlias(const char * /*alias */ ,
-                  ExtensionEntry * /*extension */ );
-
 extern _X_EXPORT ExtensionEntry *
 CheckExtension(const char *extname);
 extern _X_EXPORT ExtensionEntry *