.\"	$NetBSD: puffs.4,v 1.10 2009/11/22 18:36:16 pooka Exp $
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.Dd February 5, 2012
.Dt PUFFS 4
.Os
.Sh NAME
.Nm puffs
.Nd Pass-to-Userspace Framework File System
.Sh SYNOPSIS
.Cd "options PUFFS"
.Cd "pseudo-device putter"
.Sh DESCRIPTION
.Nm
provides a framework for creating file systems as userspace servers.
The in-kernel VFS attachment is controlled through a special device
node,
.Pa /dev/puffs .
People looking to implement file systems should use the
system through the convenience library described in
.Xr puffs 3 .
.Ss Termination
A
.Nm
file system can be unmounted regularly using
.Xr umount 8 .
The file system will automatically be unmounted in case the userspace
server is killed or the control file descriptor closed.
.Sh SEE ALSO
.Xr puffs 3
.Sh HISTORY
An unsupported experimental version of
.Nm
first appeared in
.Nx 4.0 .
A stable version appeared in
.Nx 5.0 .
.Sh AUTHORS
.An Antti Kantee Aq pooka@iki.fi