NAME
fstyp —
determine filesystem type
SYNOPSIS
fstyp |
[-l] [-s]
[-u] special |
DESCRIPTION
Thefstyp utility is used to determine the filesystem
type on a given device. It can recognize 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:
- cd9660
- exfat
- ext2fs
- geli
- 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,
fstyponly 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>.