1.\" Copyright (c) 2014 The FreeBSD Foundation 2.\" 3.\" This software was developed by Edward Tomasz Napierala under sponsorship 4.\" from the FreeBSD Foundation. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd December 24, 2019 30.Dt FSTYP 8 31.Os 32.Sh NAME 33.Nm fstyp 34.Nd determine filesystem type 35.Sh SYNOPSIS 36.Nm 37.Op Fl l 38.Op Fl s 39.Op Fl u 40.Ar special 41.Sh DESCRIPTION 42The 43.Nm 44utility is used to determine the filesystem type on a given device. 45It can recognize BeFS (BeOS), ISO-9660, exFAT, Ext2, FAT, NTFS, and UFS filesystems. 46When the 47.Fl u 48flag is specified, 49.Nm 50also recognizes certain additional metadata formats that cannot be 51handled using 52.Xr mount 8 , 53such as 54.Xr geli 8 55providers, and 56ZFS pools. 57.Pp 58The filesystem name is printed to the standard output 59as, respectively: 60.Bl -item -offset indent -compact 61.It 62befs 63.It 64cd9660 65.It 66exfat 67.It 68ext2fs 69.It 70geli 71.It 72hammer 73.It 74hammer2 75.It 76msdosfs 77.It 78ntfs 79.It 80ufs 81.It 82zfs 83.El 84.Pp 85Because 86.Nm 87is built specifically to detect filesystem types, it differs from 88.Xr file 1 89in several ways. 90The output is machine-parsable, filesystem labels are supported, 91the utility runs sandboxed using 92.Xr capsicum 4 , 93and does not try to recognize any file format other than filesystems. 94.Pp 95These options are available: 96.Bl -tag -width ".Fl l" 97.It Fl l 98In addition to filesystem type, print filesystem label if available. 99.It Fl s 100Ignore file type. 101By default, 102.Nm 103only works on regular files and disk-like device nodes. 104Trying to read other file types might have unexpected consequences or hang 105indefinitely. 106.It Fl u 107Include filesystems and devices that cannot be mounted directly by 108.Xr mount 8 . 109.El 110.Sh EXIT STATUS 111The 112.Nm 113utility exits 0 on success, and >0 if an error occurs or the filesystem 114type is not recognized. 115.Sh SEE ALSO 116.Xr file 1 , 117.Xr capsicum 4 , 118.Xr autofs 5 , 119.Xr geli 8 , 120.Xr glabel 8 , 121.Xr mount 8 , 122.Xr zpool 8 123.Sh HISTORY 124The 125.Nm 126command appeared in 127.Fx 10.2 . 128.Sh AUTHORS 129.An -nosplit 130The 131.Nm 132utility was developed by 133.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org 134under sponsorship from the FreeBSD Foundation. 135ZFS and GELI support was added by 136.An Allan Jude Aq Mt allanjude@FreeBSD.org . 137