.\"	$NetBSD: fsck_udf.8,v 1.2 2022/04/06 13:41:13 wiz Exp $
.\"
.\" Copyright (C) 2022 Reinoud Zandijk
.\" Based on fsck_msdos(8) by
.\"     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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.Dd February 6, 2022
.Dt FSCK_UDF 8
.Os
.Sh NAME
.Nm fsck_udf
.Nd Universal Disk Format file system consistency checker
.Sh SYNOPSIS
.Nm
.Fl p
.Op Fl fH
.Ar file system ...
.Nm
.Op Fl fHnSsy
.Ar file system ...
.Sh DESCRIPTION
The
.Nm
utility verifies and repairs
.Tn Universal Disk Format
file systems (more commonly known as
.Tn UDF
file systems).
.Pp
The first form of
.Nm
preens the specified file systems.
It is normally started by
.Xr fsck 8
run from
.Pa /etc/rc
during automatic reboot, when an UDF file system is detected.
When preening file systems,
.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 file systems and tries to repair all
detected inconsistencies, requesting confirmation before
making any changes.
.Pp
The options are as follows:
.Bl -tag -width XXXoptions
.It Fl f
Force detailed checking even when file system is marked closed.
.It Fl H
Enables heuristic repair options repairing known corruptions in the wild
caused by bugs.
.It Fl n
Causes
.Nm
to assume no as the answer to all operator questions.
.It Fl p
Preen the specified file systems.
.It Fl S
Causes
.Nm
to scan for older VAT tables on recordable media.
This allows older snapshots of the file system on recordable media to
be recovered.
.It Fl s Ar session
Select session
.Ar session
to be checked on recordable media.
This allows older sessions of the file system on recordable media to
be recovered.
.It Fl y
Causes
.Nm
to assume yes as the answer to all operator questions.
.El
.Sh SEE ALSO
.Xr fsck 8 ,
.Xr fsck_ffs 8 ,
.Xr mount_udf 8
.Sh HISTORY
A
.Nm
utility appeared in
.Nx 10.0 .
.Sh BUGS
.Nm
is still under construction.
Not all possible reparations are implemented.