From e2cfd90e5bdaa1e03a4555343ca39176c8cf839b Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Thu, 3 Jul 2014 08:17:14 +0200
Subject: [PATCH] poll.2: The negate-fd-to-ignore technique does not work for
 file descriptor 0

See https://bugzilla.kernel.org/show_bug.cgi?id=79411

Reported-by: Nadav Har'El <nyh@math.technion.ac.il>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/poll.2 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/man2/poll.2 b/man2/poll.2
index ffd718c8d..390e7a9b7 100644
--- a/man2/poll.2
+++ b/man2/poll.2
@@ -83,7 +83,8 @@ file descriptor for a single
 .BR poll ()
 call: simply negate the
 .I fd
-field.)
+field.
+Note, however, that this technique can't be used to ignore file descriptor 0.)
 
 The field
 .I events