From 9d790fdba9309d5dfca2c87cfbd2ad69518a6ce1 Mon Sep 17 00:00:00 2001
From: daniel <daniel@openbsd.org>
Date: Fri, 27 Mar 2026 20:05:58 +0000
Subject: [PATCH] catgets(3): set errno when a message isn't found as per
 POSIX.

The same change was made by NetBSD in rev 1.13 in 1998.

Flagged by Sortix os-test.

ok guenther@
---
 lib/libc/nls/catgets.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/libc/nls/catgets.c b/lib/libc/nls/catgets.c
index b0ecc598f00..c5ab8301315 100644
--- a/lib/libc/nls/catgets.c
+++ b/lib/libc/nls/catgets.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: catgets.c,v 1.9 2015/09/05 11:25:30 guenther Exp $ */
+/*	$OpenBSD: catgets.c,v 1.10 2026/03/27 20:05:58 daniel Exp $ */
 /*-
  * Copyright (c) 1996 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -82,6 +82,7 @@ catgets(nl_catd catd, int set_id, int msg_id, const char *s)
 			}
 
 			/* not found */
+			errno = ENOMSG;
 			return (char *) s;
 
 		} else if (r < 0) {
@@ -92,6 +93,7 @@ catgets(nl_catd catd, int set_id, int msg_id, const char *s)
 	}
 
 	/* not found */
+	errno = ENOMSG;
 	return (char *) s;
 }
 DEF_WEAK(catgets);