From 7676eafe87909b7d1943b9b6395b72158ec08cb7 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Fri, 16 Jun 2017 09:45:03 +0200
Subject: [PATCH] ptsname.3: Since glibc 2.26, ptsname_r() no longer gives
 EINVAL for buf==NULL

Reported-by: Arjun Shankar <arjun.is@lostca.se>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man3/ptsname.3 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/man3/ptsname.3 b/man3/ptsname.3
index 0ce88a171..05f4958ed 100644
--- a/man3/ptsname.3
+++ b/man3/ptsname.3
@@ -76,6 +76,9 @@ is set to indicate the error.
 only)
 .I buf
 is NULL.
+(This error is returned only for
+.\" glibc commit 8f0a947cf55f3b0c4ebdf06953c57eff67a22fa9
+glibc 2.25 and earlier.)
 .TP
 .B ENOTTY
 .I fd