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.Dd December 24, 2019 .Dt FSTYP 8 .Os .Sh NAME .Nm fstyp .Nd determine filesystem type .Sh SYNOPSIS .Nm .Op Fl l .Op Fl s .Op Fl u .Ar special .Sh DESCRIPTION The .Nm 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 .Fl u flag is specified, .Nm also recognizes certain additional metadata formats that cannot be handled using .Xr mount 8 , such as .Xr geli 8 providers, and ZFS pools.
p The filesystem name is printed to the standard output as, respectively: l -item -offset indent -compact t befs t cd9660 t exfat t ext2fs t geli t hammer t hammer2 t msdosfs t ntfs t ufs t zfs .El
p Because .Nm is built specifically to detect filesystem types, it differs from .Xr file 1 in several ways. The output is machine-parsable, filesystem labels are supported, the utility runs sandboxed using .Xr capsicum 4 , and does not try to recognize any file format other than filesystems.
p These options are available: l -tag -width ".Fl l" t Fl l In addition to filesystem type, print filesystem label if available. t Fl s Ignore file type. By default, .Nm only works on regular files and disk-like device nodes. Trying to read other file types might have unexpected consequences or hang indefinitely. t Fl u Include filesystems and devices that cannot be mounted directly by .Xr mount 8 . .El .Sh EXIT STATUS The .Nm utility exits 0 on success, and >0 if an error occurs or the filesystem type is not recognized. .Sh SEE ALSO .Xr file 1 , .Xr capsicum 4 , .Xr autofs 5 , .Xr geli 8 , .Xr glabel 8 , .Xr mount 8 , .Xr zpool 8 .Sh HISTORY The .Nm command appeared in .Fx 10.2 . .Sh AUTHORS .An -nosplit The .Nm utility was developed by .An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org under sponsorship from the FreeBSD Foundation. ZFS and GELI support was added by .An Allan Jude Aq Mt allanjude@FreeBSD.org .