FSTYP(8)                FreeBSD 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 BeFS (BeOS), ISO-9660, exFAT, 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 geli(8) providers, and ZFS pools.

     The filesystem name is printed to the standard output as, respectively:
           befs
           cd9660
           exfat
           ext2fs
           geli
           hammer
           hammer2
           msdosfs
           ntfs
           ufs
           zfs

     Because fstyp is built specifically to detect filesystem types, it
     differs 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(5), 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>.

FreeBSD 13.1-RELEASE-p6        December 24, 2019       FreeBSD 13.1-RELEASE-p6