1.\" 2.\" Copyright (c) 1992, 1993, 1994 3.\" The Regents of the University of California. All rights reserved. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software donated to Berkeley by 7.\" Jan-Simon Pendry. 8.\" 9.\" %sccs.include.redist.roff% 10.\" 11.\" @(#)mount_lofs.8 8.2 (Berkeley) 03/27/94 12.\" 13.\" 14.Dd 15.Dt MOUNT_LOFS 8 16.Os BSD 4.4 17.Sh NAME 18.Nm mount_lofs 19.Nd mount a virtual copy of an existing filesystem sub-tree 20.Sh SYNOPSIS 21.Nm mount_lofs 22.Op Fl o Ar options 23.Ar target 24.Ar mount-point 25.Sh DESCRIPTION 26The 27.Nm mount_lofs 28command makes a sub-tree of an existing filesystem visible 29in another part of the global filesystem namespace. 30This allows existing files and directories to be accessed 31using a different pathname. 32.Pp 33The primary differences between a virtual copy of the filesystem 34and a symbolic link are that 35.Xr getcwd 3 36functions correctly in the virtual copy, and that other filesystems 37may be mounted on the virtual copy without affecting the original. 38A different device number for the virtual copy is returned by 39.Xr stat 2 , 40but in other respects it is indistinguishable from the original. 41.Pp 42The options are as follows: 43.Bl -tag -width indent 44.It Fl o 45Options are specified with a 46.Fl o 47flag followed by a comma separated string of options. 48See the 49.Xr mount 8 50man page for possible options and their meanings. 51.Sh SEE ALSO 52.Xr mount 8 53.Sh HISTORY 54The 55.Nm mount_lofs 56utility first appeared in 4.4BSD. 57