1.\"	$NetBSD: fsck_msdos.8,v 1.9 1997/10/17 11:19:58 ws Exp $
2.\" $FreeBSD: src/sbin/fsck_msdosfs/fsck_msdosfs.8,v 1.3.2.2 2003/01/26 03:19:48 keramida Exp $
3.\"
4.\" Copyright (C) 1995 Wolfgang Solfrank
5.\" Copyright (c) 1995 Martin Husemann
6.\"
7.\" Redistribution and use in source and binary forms, with or without
8.\" modification, are permitted provided that the following conditions
9.\" are met:
10.\" 1. Redistributions of source code must retain the above copyright
11.\"    notice, this list of conditions and the following disclaimer.
12.\" 2. Redistributions in binary form must reproduce the above copyright
13.\"    notice, this list of conditions and the following disclaimer in the
14.\"    documentation and/or other materials provided with the distribution.
15.\" 3. All advertising materials mentioning features or use of this software
16.\"    must display the following acknowledgement:
17.\"	This product includes software developed by Martin Husemann
18.\"	and Wolfgang Solfrank.
19.\" 4. Neither the name of the University nor the names of its contributors
20.\"    may be used to endorse or promote products derived from this software
21.\"    without specific prior written permission.
22.\"
23.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
24.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26.\" IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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32.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33.\"
34.\"
35.Dd September 29, 2016
36.Dt FSCK_MSDOSFS 8
37.Os
38.Sh NAME
39.Nm fsck_msdosfs
40.Nd DOS/Windows (FAT) filesystem consistency checker
41.Sh SYNOPSIS
42.Nm
43.Fl p
44.Op Fl f
45.Ar filesystem ...
46.Nm
47.Op Fl fny
48.Ar filesystem ...
49.Sh DESCRIPTION
50The
51.Nm
52utility verifies and repairs
53.Tn FAT
54filesystems (more commonly known
55as
56.Tn DOS
57filesystems).
58.Pp
59The first form of
60.Nm
61preens the specified filesystems.
62It is normally started by
63.Xr fsck 8
64run from
65.Pa /etc/rc
66during automatic reboot, when a FAT filesystem is detected.
67When preening file systems,
68.Nm
69will fix common inconsistencies non-interactively.
70If more serious problems are found,
71.Nm
72does not try to fix them, indicates that it was not
73successful, and exits.
74.Pp
75The second form of
76.Nm
77checks the specified file systems and tries to repair all
78detected inconsistencies, requesting confirmation before
79making any changes.
80.Pp
81The options are as follows:
82.Bl -tag -width indent
83.It Fl F
84Compatibility with the wrapper
85.Xr fsck 8
86which seeks to determine whether the filesystem needs to be cleaned
87immediately in foreground, or if its cleaning can be deferred to background.
88FAT (MS-DOS) file systems must always be cleaned in the foreground.
89A non-zero exit code is always returned for this option.
90.It Fl f
91This option is ignored by
92.Nm ,
93and is present only for compatibility with programs that
94check other file system types for consistency, such as
95.Xr fsck_ffs 8 .
96.It Fl n
97Causes
98.Nm
99to assume
100.Dq Li no
101as the answer to all operator
102questions, except
103.Dq Li CONTINUE? .
104.It Fl p
105Preen the specified filesystems.
106.It Fl y
107Causes
108.Nm
109to assume
110.Dq Li yes
111as the answer to all operator questions.
112.El
113.Sh SEE ALSO
114.Xr fsck 8 ,
115.Xr fsck_ffs 8 ,
116.Xr mount_msdos 8
117.Sh HISTORY
118The
119.Nm
120utility appeared in
121.Nx 1.2 .
122.Nm
123first appeared in
124.Fx 4.4 .
125.Sh BUGS
126The
127.Nm
128utility is
129.Ud
130