From 3adf55e9512dbe9cde6bfa7e594f95337ac1b8f1 Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Fri, 15 May 2015 10:53:06 +0000
Subject: [PATCH] MFC r278316:

Make "ctladm islist" ignore unknown elements, so the old version
continues to work with newer kernel.

Other ctladm(8) "*list" subcommands seem to already handle it in
a reasonable way.

Sponsored by:	The FreeBSD Foundation
---
 usr.sbin/ctladm/ctladm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/usr.sbin/ctladm/ctladm.c b/usr.sbin/ctladm/ctladm.c
index f2e933a77cc1..03c751b21f31 100644
--- a/usr.sbin/ctladm/ctladm.c
+++ b/usr.sbin/ctladm/ctladm.c
@@ -3559,8 +3559,12 @@ cctl_islist_end_element(void *user_data, const char *name)
 	} else if (strcmp(name, "connection") == 0) {
 		islist->cur_conn = NULL;
 	} else if (strcmp(name, "ctlislist") == 0) {
-	} else
-		errx(1, "unknown element %s", name);
+		/* Nothing. */
+	} else {
+		/*
+		 * Unknown element; ignore it for forward compatiblity.
+		 */
+	}
 
 	free(str);
 }