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.Dd December 24, 2019 28.Dt FSTYP 8 29.Os 30.Sh NAME 31.Nm fstyp 32.Nd determine filesystem type 33.Sh SYNOPSIS 34.Nm 35.Op Fl l 36.Op Fl s 37.Op Fl u 38.Ar special 39.Sh DESCRIPTION 40The 41.Nm 42utility is used to determine the filesystem type on a given device. 43It can recognize BeFS (BeOS), ISO-9660, exFAT, Ext2, FAT, NTFS, and UFS filesystems. 44When the 45.Fl u 46flag is specified, 47.Nm 48also recognizes certain additional metadata formats that cannot be 49handled using 50.Xr mount 8 , 51such as 52.Xr geli 8 53providers, and 54ZFS pools. 55.Pp 56The filesystem name is printed to the standard output 57as, respectively: 58.Bl -item -offset indent -compact 59.It 60befs 61.It 62cd9660 63.It 64exfat 65.It 66ext2fs 67.It 68geli 69.It 70hammer 71.It 72hammer2 73.It 74msdosfs 75.It 76ntfs 77.It 78ufs 79.It 80zfs 81.El 82.Pp 83Because 84.Nm 85is built specifically to detect filesystem types, it differs from 86.Xr file 1 87in several ways. 88The output is machine-parsable, filesystem labels are supported, 89the utility runs sandboxed using 90.Xr capsicum 4 , 91and does not try to recognize any file format other than filesystems. 92.Pp 93These options are available: 94.Bl -tag -width ".Fl l" 95.It Fl l 96In addition to filesystem type, print filesystem label if available. 97.It Fl s 98Ignore file type. 99By default, 100.Nm 101only works on regular files and disk-like device nodes. 102Trying to read other file types might have unexpected consequences or hang 103indefinitely. 104.It Fl u 105Include filesystems and devices that cannot be mounted directly by 106.Xr mount 8 . 107.El 108.Sh EXIT STATUS 109The 110.Nm 111utility exits 0 on success, and >0 if an error occurs or the filesystem 112type is not recognized. 113.Sh SEE ALSO 114.Xr file 1 , 115.Xr capsicum 4 , 116.Xr autofs 5 , 117.Xr geli 8 , 118.Xr glabel 8 , 119.Xr mount 8 , 120.Xr zpool 8 121.Sh HISTORY 122The 123.Nm 124command appeared in 125.Fx 10.2 . 126.Sh AUTHORS 127.An -nosplit 128The 129.Nm 130utility was developed by 131.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org 132under sponsorship from the FreeBSD Foundation. 133ZFS and GELI support was added by 134.An Allan Jude Aq Mt allanjude@FreeBSD.org . 135