From 044fd543661749a5718c69d538b44019a7a72b2f Mon Sep 17 00:00:00 2001
From: Bryan Drewery <bdrewery@FreeBSD.org>
Date: Wed, 9 Mar 2016 19:50:35 +0000
Subject: FILEMON_SET_FD: Disallow changing the fd.

MFC after:	1 week
Suggested by:	mjg
Sponsored by:	EMC / Isilon Storage Division
---
 share/man/man4/filemon.4 | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'share')

diff --git a/share/man/man4/filemon.4 b/share/man/man4/filemon.4
index a006fd2d573d..3287a47aab6a 100644
--- a/share/man/man4/filemon.4
+++ b/share/man/man4/filemon.4
@@ -31,7 +31,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 28, 2016
+.Dd March 9, 2016
 .Dt FILEMON 4
 .Os
 .Sh NAME
@@ -125,6 +125,19 @@ function returns the value 0 if successful;
 otherwise the value \-1 is returned and the global variable
 .Va errno
 is set to indicate the error.
+.Sh ERRORS
+The
+.Fn ioctl
+system call
+with
+.Dv FILEMON_SET_FD
+will fail if:
+.Bl -tag -width Er
+.It Bq Er EEXIST
+The
+.Nm
+handle is already associated with a file descriptor.
+.El
 .Sh FILES
 .Bl -tag -width ".Pa /dev/filemon"
 .It Pa /dev/filemon
-- 
cgit v1.2.3