xace: add access_mode argument to selection hook.

Xext/xace.c

@@ -151,6 +151,7 @@ int XaceHook(int hook, ...)
 	    XaceSelectionAccessRec rec = {
 		va_arg(ap, ClientPtr),
 		va_arg(ap, Selection*),
+		va_arg(ap, Mask),
 		TRUE	/* default allow */
 	    };
 	    calldata = &rec;

Xext/xacestr.h

@@ -98,6 +98,7 @@ typedef struct {
 typedef struct {
     ClientPtr client;
     Selection *selection;
+    Mask access_mode;
     int rval;
 } XaceSelectionAccessRec;
 

dix/dispatch.c

@@ -1119,7 +1119,8 @@ ProcGetSelectionOwner(register ClientPtr client)
 	reply.length = 0;
 	reply.sequenceNumber = client->sequence;
         if (i < NumCurrentSelections &&
-	    XaceHook(XACE_SELECTION_ACCESS, client, &CurrentSelections[i]))
+	    XaceHook(XACE_SELECTION_ACCESS, client, &CurrentSelections[i],
+		     DixReadAccess))
             reply.owner = CurrentSelections[i].destwindow;
         else
             reply.owner = None;
@@ -1159,7 +1160,8 @@ ProcConvertSelection(register ClientPtr client)
 	       CurrentSelections[i].selection != stuff->selection) i++;
 	if ((i < NumCurrentSelections) &&
 	    (CurrentSelections[i].window != None) &&
-	    XaceHook(XACE_SELECTION_ACCESS, client, &CurrentSelections[i]))
+	    XaceHook(XACE_SELECTION_ACCESS, client, &CurrentSelections[i],
+		     DixReadAccess))
 	{        
 	    event.u.u.type = SelectionRequest;
 	    event.u.selectionRequest.time = stuff->time;