===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/cmd-rename-session.c,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -r1.9 -r1.10
--- src/usr.bin/tmux/cmd-rename-session.c	2011/04/05 19:37:01	1.9
+++ src/usr.bin/tmux/cmd-rename-session.c	2011/04/06 21:51:31	1.10
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-rename-session.c,v 1.9 2011/04/05 19:37:01 nicm Exp $ */
+/* $OpenBSD: cmd-rename-session.c,v 1.10 2011/04/06 21:51:31 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -46,6 +46,10 @@
 	const char	*newname;
 
 	newname = args->argv[0];
+	if (!session_check_name(newname)) {
+		ctx->error(ctx, "bad session name: %s", newname);
+		return (-1);
+	}
 	if (session_find(newname) != NULL) {
 		ctx->error(ctx, "duplicate session: %s", newname);
 		return (-1);