From d790b96563f0247e46ddfbfe2bd1e543958c1e26 Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Mon, 12 Aug 2013 21:01:01 +0000
Subject: [PATCH] Make check for unknown login class actually work. 
 Previously, using the "-c" option with login class not defined in
 login.conf(5) would silently fail, resulting in using the default login
 class.

---
 usr.bin/su/su.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr.bin/su/su.c b/usr.bin/su/su.c
index 6557c343a0c..e721e62300a 100644
--- a/usr.bin/su/su.c
+++ b/usr.bin/su/su.c
@@ -373,6 +373,8 @@ main(int argc, char *argv[])
 		}
 		lc = login_getclass(class);
 		if (lc == NULL)
+			err(1, "login_getclass");
+		if (lc->lc_class == NULL || strcmp(class, lc->lc_class) != 0)
 			errx(1, "unknown class: %s", class);
 	}