From 4ff76833b4a2d217f1fdbb4ed753a342824a470a Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Tue, 19 Aug 1997 07:04:43 +0000
Subject: [PATCH] Forgot to mention what getpgid(0) does.

---
 lib/libc/sys/getpgrp.2 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/libc/sys/getpgrp.2 b/lib/libc/sys/getpgrp.2
index 6e9d1e4d211..ff43c0be2f2 100644
--- a/lib/libc/sys/getpgrp.2
+++ b/lib/libc/sys/getpgrp.2
@@ -50,6 +50,11 @@ The process group of the process identified by
 .Fa pid
 is returned by
 .Fn getpgid .
+If
+.Fa pid
+is zero,
+.Fn getpgid
+returns the process group of the current process.
 .Pp
 Process groups are used for distribution of signals, and
 by terminals to arbitrate requests for their input: processes