9a67c570a9
Reported by: mckusick Reviewed by: mckusick, emaste, bcr MFC after: 28 days X-MFC-with: r356313 Differential Revision: https://reviews.freebsd.org/D23049
142 lines
3.5 KiB
Groff
142 lines
3.5 KiB
Groff
.\" $NetBSD: fsck_msdos.8,v 1.9 1997/10/17 11:19:58 ws Exp $
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.\"
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.\" Copyright (C) 1995 Wolfgang Solfrank
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.\" Copyright (c) 1995 Martin Husemann
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 6, 2020
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.Dt FSCK_MSDOSFS 8
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.Os
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.Sh NAME
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.Nm fsck_msdosfs
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.Nd DOS/Windows (FAT) file system consistency checker
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.Sh SYNOPSIS
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.Nm
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.Fl p
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.Op Fl Cf
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.Ar filesystem ...
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.Nm
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.Op Fl CMny
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.Ar filesystem ...
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.Sh DESCRIPTION
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The
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.Nm
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utility verifies and repairs
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.Tn FAT
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file systems (more commonly known
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as
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.Tn DOS
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file systems).
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.Pp
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The first form of
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.Nm
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preens the specified file systems.
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It is normally started by
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.Xr fsck 8
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run from
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.Pa /etc/rc
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during automatic reboot, when a FAT file system is detected.
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When preening file systems,
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.Nm
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will fix common inconsistencies non-interactively.
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If more serious problems are found,
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.Nm
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does not try to fix them, indicates that it was not
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successful, and exits.
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.Pp
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The second form of
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.Nm
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checks the specified file systems and tries to repair all
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detected inconsistencies, requesting confirmation before
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making any changes.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl C
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Compatibility with the corresponding
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.Xr fsck 8
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option (skip check if clean), defined to no-op.
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.It Fl F
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Compatibility with the wrapper
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.Xr fsck 8
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which seeks to determine whether the file system needs to be cleaned
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immediately in foreground, or if its cleaning can be deferred to background.
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FAT (MS-DOS) file systems must always be cleaned in the foreground.
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A non-zero exit code is always returned for this option.
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.It Fl M
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Causes
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.Nm
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to not use
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.Xr mmap 2
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when checking a FAT32 file system.
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This option is mainly for debugging purposes and is not normally necessary.
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The
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.Nm
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utility will automatically fall back to use a simple LRU cache of 4 MiB
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when it failed to perform
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.Xr mmap 2 ,
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or when
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.Fl M
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is specified.
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.It Fl f
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Force
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.Nm
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to check
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.Dq clean
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file systems when preening.
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.It Fl n
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Causes
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.Nm
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to assume
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.Dq Li no
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as the answer to all operator
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questions, except
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.Dq Li CONTINUE? .
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.It Fl p
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Preen the specified file systems.
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.It Fl y
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Causes
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.Nm
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to assume
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.Dq Li yes
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as the answer to all operator questions.
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.El
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.Sh SEE ALSO
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.Xr fsck 8 ,
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.Xr fsck_ffs 8 ,
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.Xr mount_msdosfs 8
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.Sh HISTORY
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The
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.Nm
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utility appeared in
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.Nx 1.2 .
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.Nm
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first appeared in
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.Fx 4.4 .
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.Sh BUGS
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The
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.Nm
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utility is
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.Ud
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