From 3ee895129bfab0e557839cf518c466469d3a0277 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Wed, 23 Apr 2008 14:49:53 +0000
Subject: [PATCH] If the 'sigmask' is NULL, the ppoll() is equivalent to poll()
 with respect tio signal mask manipulations.

---
 man2/poll.2 | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/man2/poll.2 b/man2/poll.2
index 13dd73587..6354aa35c 100644
--- a/man2/poll.2
+++ b/man2/poll.2
@@ -215,6 +215,18 @@ for an explanation of why
 .BR ppoll ()
 is necessary.
 
+If the
+.I sigmask
+argument is specified as NULL, then
+no signal mask manipulation is performed
+(and thus
+.BR ppoll ()
+differs from
+.BR poll ()
+only in the precision of the
+.I timeout
+argument).
+
 The
 .I timeout
 argument specifies an upper limit on the amount of time that