1*5ad3b09fSAlexander Ziaee.\"- 2*5ad3b09fSAlexander Ziaee.\" SPDX-License-Identifier: BSD-2-Clause 3*5ad3b09fSAlexander Ziaee.\" 41687d771SAlexander Ziaee.\" Copyright (c) 2020 Gordon Bergling 51687d771SAlexander Ziaee.\" 61687d771SAlexander Ziaee.\" Redistribution and use in source and binary forms, with or without 71687d771SAlexander Ziaee.\" modification, are permitted provided that the following conditions 81687d771SAlexander Ziaee.\" are met: 91687d771SAlexander Ziaee.\" 1. Redistributions of source code must retain the above copyright 101687d771SAlexander Ziaee.\" notice, this list of conditions and the following disclaimer. 111687d771SAlexander Ziaee.\" 2. Redistributions in binary form must reproduce the above copyright 121687d771SAlexander Ziaee.\" notice, this list of conditions and the following disclaimer in the 131687d771SAlexander Ziaee.\" documentation and/or other materials provided with the distribution. 141687d771SAlexander Ziaee.\" 151687d771SAlexander Ziaee.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 161687d771SAlexander Ziaee.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 171687d771SAlexander Ziaee.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 181687d771SAlexander Ziaee.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 191687d771SAlexander Ziaee.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 201687d771SAlexander Ziaee.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 211687d771SAlexander Ziaee.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 221687d771SAlexander Ziaee.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 231687d771SAlexander Ziaee.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 241687d771SAlexander Ziaee.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 251687d771SAlexander Ziaee.\" SUCH DAMAGE. 261687d771SAlexander Ziaee.\" 271687d771SAlexander Ziaee.Dd April 27, 2020 281687d771SAlexander Ziaee.Dt UNIONFS 4 291687d771SAlexander Ziaee.Os 301687d771SAlexander Ziaee.Sh NAME 311687d771SAlexander Ziaee.Nm unionfs 32*5ad3b09fSAlexander Ziaee.Nd union mount file system 331687d771SAlexander Ziaee.Sh SYNOPSIS 341687d771SAlexander ZiaeeTo compile this driver into the kernel, 351687d771SAlexander Ziaeeplace the following lines in your 361687d771SAlexander Ziaeekernel configuration file: 371687d771SAlexander Ziaee.Bd -ragged -offset indent 381687d771SAlexander Ziaee.Cd "option UNIONFS" 391687d771SAlexander Ziaee.Ed 401687d771SAlexander Ziaee.Pp 411687d771SAlexander ZiaeeAlternatively, to load the driver as a 421687d771SAlexander Ziaeemodule at boot time, place the following line in 431687d771SAlexander Ziaee.Xr loader.conf 5 : 441687d771SAlexander Ziaee.Bd -literal -offset indent 451687d771SAlexander Ziaeeunionfs_load="YES" 461687d771SAlexander Ziaee.Ed 471687d771SAlexander Ziaee.Sh DESCRIPTION 481687d771SAlexander ZiaeeThe UNIONFS driver is an implementation of a stackable unification filesystem. 491687d771SAlexander Ziaee.Sh SEE ALSO 501687d771SAlexander Ziaee.Xr mount_unionfs 8 511687d771SAlexander Ziaee.Sh STANDARDS 521687d771SAlexander Ziaee.Rs 531687d771SAlexander Ziaee.%T Union mounts in 4.4BSD-Lite 541687d771SAlexander Ziaee.%A J. S. Pendry 551687d771SAlexander Ziaee.%A M. K. McKusick 561687d771SAlexander Ziaee.%R Proceedings of the USENIX Technical Conference on UNIX and Advanced Computing Systems 571687d771SAlexander Ziaee.%D December 1995 581687d771SAlexander Ziaee.Re 591687d771SAlexander Ziaee.Pp 601687d771SAlexander Ziaee.Rs 611687d771SAlexander Ziaee.%T Jails: Confining the omnipotent root 621687d771SAlexander Ziaee.%A P. H. Kamp 631687d771SAlexander Ziaee.%A R. N. M. Watson 641687d771SAlexander Ziaee.%R Proceedings of the Second International System Administration and Networking Conference (SANE2000) 651687d771SAlexander Ziaee.%D May 2000 661687d771SAlexander Ziaee.Re 671687d771SAlexander Ziaee.Sh HISTORY 681687d771SAlexander ZiaeeThe 691687d771SAlexander Ziaee.Nm 701687d771SAlexander Ziaeedevice driver first appeared in 711687d771SAlexander Ziaee.Fx 5.0 . 721687d771SAlexander Ziaee.Sh AUTHORS 731687d771SAlexander Ziaee.An -nosplit 741687d771SAlexander ZiaeeThe 751687d771SAlexander Ziaee.Nm 761687d771SAlexander Ziaeedevice driver was written by Jan-Simon Pendry for 771687d771SAlexander Ziaee.Bx 4.4 781687d771SAlexander Ziaeeand 791687d771SAlexander Ziaee.An Masanori OZAWA Aq Mt ozawa@ongs.co.jp 801687d771SAlexander Ziaeereimplemented the handling of the locking for 811687d771SAlexander Ziaee.Fx 7.0 . 821687d771SAlexander ZiaeeThe manual page was written by 831687d771SAlexander Ziaee.An Gordon Bergling Aq Mt gbe@FreeBSD.org . 841687d771SAlexander Ziaee.Sh BUGS 851687d771SAlexander ZiaeePlease see the 861687d771SAlexander Ziaee.Xr mount_unionfs 8 871687d771SAlexander Ziaeemanual page for a list of bugs regarding the 881687d771SAlexander Ziaee.Nm 891687d771SAlexander Ziaeefilesystem. 90