Disable redefinition of built-in commands.

[Don Howard <dhoward@redhat.com>]

The following patch disables redefinition of built-in commands.  This 
corrects two problems:  

Redefining a built-in command leaves the command's alias in an
inconsistent state.  Invoking the alias of a redefined command can cause
gdb to crash.

Once a built-in command has been redefined, there is no way to access that
command's original functionality.




Index: cli/cli-script.c
===================================================================
RCS file: /cvs/src/src/gdb/cli/cli-script.c,v
retrieving revision 1.12
diff -p -u -w -r1.12 cli-script.c
--- cli/cli-script.c    12 Apr 2002 22:31:23 -0000      1.12
+++ cli/cli-script.c    6 Jun 2002 18:05:08 -0000
@@ -1070,9 +1070,7 @@ define_command (char *comname, int from_
       if (c->class == class_user || c->class == class_alias)
        tem = "Redefine command \"%s\"? ";
       else
-       tem = "Really redefine built-in command \"%s\"? ";
-      if (!query (tem, c->name))
-       error ("Command \"%s\" not redefined.", c->name);
+       error ("Redefinition of built-in commands is not supported.");
     }
 
   /* If this new command is a hook, then mark the command which it


-- 
dhoward@redhat.com
gdb engineering