2020-04-30 12:02:13 +00:00
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.\" Copyright (c) 2020 Gordon Bergling
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 27, 2020
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.Dt UNIONFS 5
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.Os
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.Sh NAME
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.Nm unionfs
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.Nd "UNION FS"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "option UNIONFS"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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unionfs_load="YES"
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.Ed
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.Sh DESCRIPTION
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The UNIONFS driver is an implementation of a stackable unification filesystem.
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.Sh SEE ALSO
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.Xr mount_unionfs 8
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.Sh STANDARDS
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.Rs
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.%T Union mounts in 4.4BSD-Lite
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.%A J. S. Pendry
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.%A M. K. McKusick
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.%R Proceedings of the USENIX Technical Conference on UNIX and Advanced Computing Systems
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.%D December 1995
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.Re
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.Pp
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.Rs
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.%T Jails: Confining the omnipotent root
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.%A P. H. Kamp
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.%A R. N. M. Watson
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.%R Proceedings of the Second International System Administration and Networking Conference (SANE2000)
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.%D May 2000
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.Re
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 5.0 .
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.Sh AUTHORS
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The
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.Nm
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device driver was written by Jan-Simon Pendry for
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.Bx 4.4
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and
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.An Masanori OZAWA Aq Mt ozawa@ongs.co.jp
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reimplemented the handling of the locking for
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.Fx 7.0 .
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The manual page was written by
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2020-10-27 18:30:43 +00:00
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.An Gordon Bergling Aq Mt gbe@FreeBSD.org .
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2020-04-30 12:02:13 +00:00
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.Sh BUGS
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Please see the
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.Xr mount_unionfs 8
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manual page for a list of bugs regarding the
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.Nm
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filesystem.
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