From 4fecd7037792c72c25b75d416584af545f376dbd Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Tue, 26 Feb 2008 12:34:29 +0000
Subject: [PATCH] Clarify error that occurs if we add an epoll fd to its own
 set.

---
 man7/epoll.7 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/man7/epoll.7 b/man7/epoll.7
index b6bb0c73a..c84fd4e1e 100644
--- a/man7/epoll.7
+++ b/man7/epoll.7
@@ -266,7 +266,10 @@ What happens if the
 file descriptor is put into its own file descriptor set?
 .TP
 .B A4
-It will fail.
+The
+.BR epoll_ctl (2)
+call will fail
+.RB ( EINVAL ).
 However, you can add an
 .B epoll
 file descriptor inside another epoll file descriptor set.