1.\" $NetBSD: puffs.4,v 1.12 2014/03/18 18:20:39 riastradh Exp $ 2.\" 3.\" Copyright (c) 2009 Antti Kantee. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd November 22, 2009 27.Dt PUFFS 4 28.Os 29.Sh NAME 30.Nm puffs 31.Nd Pass-to-Userspace Framework File System 32.Sh SYNOPSIS 33.Cd "file-system PUFFS" 34.Cd "pseudo-device putter" 35.Sh DESCRIPTION 36.Nm 37provides a framework for creating file systems as userspace servers. 38The in-kernel VFS attachment is controlled through a special device 39node, 40.Pa /dev/puffs . 41People looking to implement file systems should use the 42system through the convenience library described in 43.Xr puffs 3 . 44.Ss Termination 45A 46.Nm 47file system can be unmounted regularly using 48.Xr umount 8 . 49The file system will automatically be unmounted in case the userspace 50server is killed or the control file descriptor closed. 51.Sh SEE ALSO 52.Xr puffs 3 53.Sh HISTORY 54An unsupported experimental version of 55.Nm 56first appeared in 57.Nx 4.0 . 58A stable version appeared in 59.Nx 5.0 . 60.Sh AUTHORS 61.An Antti Kantee Aq Mt pooka@iki.fi 62