xref: /dragonfly/usr.sbin/fstyp/fstyp.8 (revision cc05af1e)

.\" Copyright (c) 2016 The DragonFly Project
.\" Copyright (c) 2014 The FreeBSD Foundation
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.\" This software was developed by Edward Tomasz Napierala under sponsorship
.\" from the FreeBSD Foundation.
.\"
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.\" $FreeBSD$
.\"
.Dd April 14, 2016
.Dt FSTYP 8
.Os
.Sh NAME
.Nm fstyp
.Nd determine filesystem type
.Sh SYNOPSIS
.Nm
.Op Fl l
.Op Fl s
.Op Fl u
.Ar special
.Sh DESCRIPTION
The
.Nm
utility is used to determine the filesystem type on a given device.
It can recognize ISO-9660, Ext2, FAT, NTFS, UFS, and HAMMER filesystems.
When the
.Fl u
flag is specified,
.Nm
also recognizes certain additional metadata formats that cannot be
handled using
.Xr mount 8 .
.Pp
The filesystem name is printed to the standard output
as, respectively:
.Bl -item -offset indent -compact
.It
cd9660
.It
ext2fs
.It
msdosfs
.It
ntfs
.It
ufs
.It
hammer
.El
.Pp
Note that HAMMER filesystem consists of more than one volumes requires a path in blkdevs format.
See
.Xr hammer 8
for blkdevs format.
.Nm
doesn't recognize partially specified block devices as HAMMER filesystem volumes unless
.Fl u
flag is specified.
.Pp
Because
.Nm
is built specifically to detect filesystem types, it differs from
.Xr file 1
in several ways.
The output is machine-parsable, filesystem labels are supported,
and does not try to recognize any file format other than filesystems.
.Pp
These options are available:
.Bl -tag -width ".Fl l"
.It Fl l
In addition to filesystem type, print filesystem label if available.
.It Fl s
Ignore file type.
By default,
.Nm
only works on regular files and disk-like device nodes.
Trying to read other file types might have unexpected consequences or hang
indefinitely.
.It Fl u
Include filesystems and devices that cannot be mounted directly by
.Xr mount 8 .
.El
.Sh EXIT STATUS
The
.Nm
utility exits 0 on success, and >0 if an error occurs or the filesystem
type is not recognized.
.Sh SEE ALSO
.Xr file 1 ,
.Xr autofs 5 ,
.Xr hammer 8 ,
.Xr mount 8
.Sh HISTORY
The
.Nm
command appeared in
.Fx 10.2 .
The
.Nm
command appeared in
.Dx 4.5 .
.Sh AUTHORS
.An -nosplit
The
.Nm
utility was developed by
.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org
under sponsorship from the FreeBSD Foundation.
ZFS and GELI support was added by
.An Allan Jude Aq Mt allanjude@FreeBSD.org .
.Pp
The
.Nm
utility was ported to
.Dx
by
.An Tomohiro Kusumi Aq Mt kusumi.tomohiro@gmail.com .
Donated to DragonFlyBSD by PeerCorps Trust Fund.
.Sh BUGS
The
.Nm
utility on
.Dx
currently doesn't support
.Xr zfs 8
pool and
.Xr geli 8
providers supported on
.Fx .