1.\" 2.\" Copyright (c) 1992 The Regents of the University of California 3.\" Copyright (c) 1990, 1992 Jan-Simon Pendry 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 5.2 (Berkeley) 07/05/92 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 F Ar fsoptions 23.Ar target mount-point 24.Sh DESCRIPTION 25The 26.Nm mount_lofs 27command makes a sub-tree of an existing filesystem visible 28in another part of the global filesystem namespace. 29This allows existing files and directories to be accessed 30using a different pathname. 31.Pp 32The primary differences between a virtual copy of the filesystem 33and a symbolic link are that 34.Xr getcwd 3 35functions correctly in the virtual copy, and that other filesystems 36may be mounted on the virtual copy without affecting the original. 37A different device number for the virtual copy is returned by 38.Xr stat 2 , 39but in other respects it is indistinguishable from the original. 40.Sh HISTORY 41The 42loopback filesystem 43is 44.Ud 45