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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 7 Feb 2013 15:11:44 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r246476 - head/lib/libc/sys
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Author: kib
Date: Thu Feb  7 15:11:43 2013
New Revision: 246476
URL: http://svnweb.freebsd.org/changeset/base/246476

Log:
  Document the ERESTART translation to EINTR for devfs nodes.
  
  Based on the submission by:	jilles
  MFC after:	2 weeks

Modified:
  head/lib/libc/sys/open.2

Modified: head/lib/libc/sys/open.2
==============================================================================
--- head/lib/libc/sys/open.2	Thu Feb  7 15:08:35 2013	(r246475)
+++ head/lib/libc/sys/open.2	Thu Feb  7 15:11:43 2013	(r246476)
@@ -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