FSTYP(8)		  BSD System Manager's Manual		      FSTYP(8)

NAME
     fstyp — determine filesystem type

SYNOPSIS
     fstyp [-l] [-s] [-u] special

DESCRIPTION
     The fstyp utility is used to determine the filesystem type on a given
     device.  It can recognize ISO-9660, Ext2, FAT, NTFS, and UFS filesystems.
     When the -u flag is specified, fstyp also recognizes certain additional
     metadata formats that cannot be handled using mount(8), such as ZFS pools
     and geli(8) providers.

     The filesystem name is printed to the standard output as, respectively:
	   cd9660
	   ext2fs
	   geli
	   msdosfs
	   ntfs
	   ufs
	   zfs

     Because fstyp is built specifically to detect filesystem types, it dif‐
     fers from file(1) in several ways.  The output is machine-parsable,
     filesystem labels are supported, the utility runs sandboxed using
     capsicum(4), and does not try to recognize any file format other than
     filesystems.

     These options are available:

     -l  In addition to filesystem type, print filesystem label if available.

     -s  Ignore file type.  By default, fstyp only works on regular files and
	 disk-like device nodes.  Trying to read other file types might have
	 unexpected consequences or hang indefinitely.

     -u  Include filesystems and devices that cannot be mounted directly by
	 mount(8).

EXIT STATUS
     The fstyp utility exits 0 on success, and >0 if an error occurs or the
     filesystem type is not recognized.

SEE ALSO
     file(1), capsicum(4), autofs(8), geli(8), glabel(8), mount(8), zpool(8)

HISTORY
     The fstyp command appeared in FreeBSD 10.2.

AUTHORS
     The fstyp utility was developed by Edward Tomasz Napierala
     ⟨trasz@FreeBSD.org⟩ under sponsorship from the FreeBSD Foundation.  ZFS
     and GELI support was added by
     Allan Jude ⟨allanjude@FreeBSD.org⟩

BSD				 July 11, 2015				   BSD