From 09a0268089d5e998d786af8c9720bcf654f564fc Mon Sep 17 00:00:00 2001
From: Fabian Keil <fk@fabiankeil.de>
Date: Sat, 25 Dec 2021 13:09:46 +0100
Subject: [PATCH 292/310] ctime.3: Document that ctime() checks the ISO_CTIME
 variable

Obtained from: ElectroBSD
---
 contrib/tzcode/stdtime/ctime.3 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/contrib/tzcode/stdtime/ctime.3 b/contrib/tzcode/stdtime/ctime.3
index 771027fa62ec..4198b91f1191 100644
--- a/contrib/tzcode/stdtime/ctime.3
+++ b/contrib/tzcode/stdtime/ctime.3
@@ -134,6 +134,15 @@ and returns a pointer to a 26-character string of the form:
 Thu Nov 24 18:22:48 1986\en\e0
 .Ed
 .Pp
+As a non-standard extension the
+.Fn ctime
+function checks the environment variable ISO_CTIME.
+If it is set the fuction returns a
+pointer to a 21-character string of the form:
+.Bd -literal -offset indent
+2021-11-01 22:52:37\en\e0
+.Ed
+.Pp
 All the fields have constant width.
 .Pp
 The
-- 
2.37.1