75 lines
2.2 KiB
Groff
75 lines
2.2 KiB
Groff
.\"
|
|
.\" Copyright (c) 2008 Daniel Gerzo
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd February 10, 2015
|
|
.Dt NULLFS 5
|
|
.Os
|
|
.Sh NAME
|
|
.Nm nullfs
|
|
.Nd "null file system"
|
|
.Sh SYNOPSIS
|
|
To enable support for this driver,
|
|
place the following line in the kernel configuration file:
|
|
.Bd -ragged -offset indent
|
|
.Cd "options NULLFS"
|
|
.Ed
|
|
.Pp
|
|
Alternatively, to load the driver as a
|
|
module at boot time, place the following line in
|
|
.Xr loader.conf 5 :
|
|
.Bd -literal -offset indent
|
|
nullfs_load="YES"
|
|
.Ed
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver will permit the
|
|
.Fx
|
|
kernel to mount a loopback file system sub-tree.
|
|
.Sh EXAMPLES
|
|
To mount a
|
|
.Nm
|
|
file system:
|
|
.Pp
|
|
.Dl "mount_nullfs /usr/ports /home/devel/ports"
|
|
.Sh SEE ALSO
|
|
.Xr fstab 5 ,
|
|
.Xr mount_nullfs 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
layer first appeared in
|
|
.Bx 4.4 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
The
|
|
.Nm
|
|
kernel implementation was written by
|
|
.An John Heideman .
|
|
.Pp
|
|
This manual page was written by
|
|
.An Daniel Gerzo Aq Mt danger@FreeBSD.org .
|