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509798ea65
This is based on DragonFly's implementation from about 2019-09-13. It only contains the basic code and header information to identify the disks. Relnotes: yes Differential Revision: https://reviews.freebsd.org/D13369
136 lines
3.4 KiB
Groff
136 lines
3.4 KiB
Groff
.\" Copyright (c) 2014 The FreeBSD Foundation
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.\" All rights reserved.
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.\"
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.\" This software was developed by Edward Tomasz Napierala under sponsorship
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.\" from the FreeBSD Foundation.
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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 AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 24, 2019
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.Dt FSTYP 8
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.Os
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.Sh NAME
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.Nm fstyp
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.Nd determine filesystem type
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.Sh SYNOPSIS
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.Nm
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.Op Fl l
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.Op Fl s
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.Op Fl u
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.Ar special
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.Sh DESCRIPTION
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The
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.Nm
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utility is used to determine the filesystem type on a given device.
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It can recognize ISO-9660, exFAT, Ext2, FAT, NTFS, and UFS filesystems.
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When the
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.Fl u
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flag is specified,
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.Nm
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also recognizes certain additional metadata formats that cannot be
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handled using
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.Xr mount 8 ,
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such as
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.Xr geli 8
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providers, and
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ZFS pools.
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.Pp
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The filesystem name is printed to the standard output
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as, respectively:
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.Bl -item -offset indent -compact
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.It
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cd9660
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.It
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exfat
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.It
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ext2fs
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.It
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geli
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.It
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hammer
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.It
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hammer2
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.It
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msdosfs
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.It
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ntfs
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.It
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ufs
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.It
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zfs
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.El
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.Pp
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Because
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.Nm
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is built specifically to detect filesystem types, it differs from
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.Xr file 1
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in several ways.
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The output is machine-parsable, filesystem labels are supported,
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the utility runs sandboxed using
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.Xr capsicum 4 ,
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and does not try to recognize any file format other than filesystems.
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.Pp
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These options are available:
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.Bl -tag -width ".Fl l"
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.It Fl l
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In addition to filesystem type, print filesystem label if available.
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.It Fl s
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Ignore file type.
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By default,
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.Nm
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only works on regular files and disk-like device nodes.
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Trying to read other file types might have unexpected consequences or hang
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indefinitely.
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.It Fl u
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Include filesystems and devices that cannot be mounted directly by
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.Xr mount 8 .
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.El
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.Sh EXIT STATUS
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The
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.Nm
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utility exits 0 on success, and >0 if an error occurs or the filesystem
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type is not recognized.
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.Sh SEE ALSO
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.Xr file 1 ,
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.Xr capsicum 4 ,
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.Xr autofs 5 ,
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.Xr geli 8 ,
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.Xr glabel 8 ,
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.Xr mount 8 ,
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.Xr zpool 8
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Fx 10.2 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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utility was developed by
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.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org
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under sponsorship from the FreeBSD Foundation.
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ZFS and GELI support was added by
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.An Allan Jude Aq Mt allanjude@FreeBSD.org .
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