From 305acfc1e8b3cbdb6e01a52a8fcf8ae561eae70d Mon Sep 17 00:00:00 2001
From: kib <kib@FreeBSD.org>
Date: Thu, 7 Feb 2013 15:11:43 +0000
Subject: Document the ERESTART translation to EINTR for devfs nodes.

Based on the submission by:	jilles
MFC after:	2 weeks
---
 lib/libc/sys/open.2 | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'lib/libc/sys/open.2')

diff --git a/lib/libc/sys/open.2 b/lib/libc/sys/open.2
index 041f9dc..41a6c64 100644
--- a/lib/libc/sys/open.2
+++ b/lib/libc/sys/open.2
@@ -28,7 +28,7 @@
 .\"     @(#)open.2	8.2 (Berkeley) 11/16/93
 .\" $FreeBSD$
 .\"
-.Dd March 25, 2011
+.Dd February 7, 2013
 .Dt OPEN 2
 .Os
 .Sh NAME
@@ -244,6 +244,17 @@ It returns \-1 on failure.
 The file pointer used to mark the current position within the
 file is set to the beginning of the file.
 .Pp
+If a sleeping open of a device node from
+.Xr devfs 5
+is interrupted by a signal, the call always fails with
+.Er EINTR ,
+even if the
+.Dv SA_RESTART
+flag is set for the signal.
+A sleeping open of a fifo (see
+.Xr mkfifo 2 )
+is restarted as normal.
+.Pp
 When a new file is created it is given the group of the directory
 which contains it.
 .Pp
-- 
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