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
<
[email protected]> under sponsorship from the FreeBSD Foundation. ZFS
and GELI support was added by Allan Jude <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 December 24, 2019 FreeBSD 14.1-RELEASE-p8