From a7e4a8f2dc3a5d2f20f6250a27095e2c7886460c Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Thu, 10 Jul 2008 14:54:14 +0000
Subject: [PATCH] RETURN VALUE: note that errno is set on error. Add EINVAL
 error. ffix

---
 man3/getpw.3 | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/man3/getpw.3 b/man3/getpw.3
index 2b2680348..4892112ac 100644
--- a/man3/getpw.3
+++ b/man3/getpw.3
@@ -67,16 +67,23 @@ struct passwd {
 .SH "RETURN VALUE"
 The
 .BR getpw ()
-function returns 0 on success, or \-1 if an error
-occurs.
+function returns 0 on success; on error, it returns \-1, and
+.I errno
+is set to indicate the error.
 .SH ERRORS
 .TP
+.B EINVAL
+.I buf
+is NULL.
+.TP
 .B ENOENT
 No user corresponding to
 .IR uid .
 .TP
 .B ENOMEM
-Insufficient memory to allocate passwd structure.
+Insufficient memory to allocate
+.I passwd
+structure.
 .SH FILES
 .TP
 .I /etc/passwd