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.\"	$NetBSD: fsck_msdos.8,v 1.9 1997/10/17 11:19:58 ws Exp $
.\" $FreeBSD$
.\"
.\" Copyright (C) 1995 Wolfgang Solfrank
.\" Copyright (c) 1995 Martin Husemann
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by Martin Husemann
.\"	and Wolfgang Solfrank.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\"
.Dd August 13, 1995
.Dt FSCK_MSDOSFS 8
.Os
.Sh NAME
.Nm fsck_msdosfs
.Nd DOS/Windows (FAT) filesystem consistency checker
.Sh SYNOPSIS
.Nm
.Fl p
.Op Fl f
.Ar filesystem ...
.Nm
.Op Fl fny
.Ar filesystem ...
.Sh DESCRIPTION
The
.Nm
utility verifies and repairs
.Tn FAT
filesystems (more commonly known
as
.Tn DOS
filesystems).
.Pp
The first form of
.Nm
preens the specified filesystems.
It is normally started by
.Xr fsck 8
run from
.Pa /etc/rc
during automatic reboot, when a FAT filesystem is detected.
When preening filesystems,
.Nm
will fix common inconsistencies non-interactively.
If more serious problems are found,
.Nm
does not try to fix them, indicates that it was not
successful, and exits.
.Pp
The second form of
.Nm
checks the specified filesystems and tries to repair all
detected inconsistencies, requesting confirmation before
making any changes.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl F
Compatibility with the wrapper
.Xr fsck 8
which seeks to determine whether the filesystem needs to be cleaned
immediately in foreground, or if its cleaning can be deferred to background.
FAT (MS-DOS) filesystems must always be cleaned in the foreground.
A non-zero exit code is always returned for this option.
.It Fl f
This option is ignored by
.Nm ,
and is present only for compatibility with programs that
check other filesystem types for consistency, such as
.Xr fsck_ffs 8 .
.It Fl n
Causes
.Nm
to assume
.Dq Li no
as the answer to all operator
questions, except
.Dq Li CONTINUE? .
.It Fl p
Preen the specified filesystems.
.It Fl y
Causes
.Nm
to assume
.Dq Li yes
as the answer to all operator questions.
.El
.Sh SEE ALSO
.Xr fsck 8 ,
.Xr fsck_ffs 8 ,
.Xr mount_msdos 8
.Sh BUGS
The
.Nm
utility is still under construction.
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 4.4 .