.\"	$OpenBSD: readlabelfs.3,v 1.7 2007/05/31 19:19:38 jmc Exp $
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.Dd $Mdocdate: May 31 2007 $
.Dt READLABELFS 3
.Os
.Sh NAME
.Nm readlabelfs
.Nd read disklabel filesystem type
.Sh SYNOPSIS
.Fd #include <util.h>
.Ft char *
.Fn readlabelfs "char *device" "int verbose"
.Sh DESCRIPTION
The
.Fn readlabelfs
function attempts to determine the filesystem type of the disk
partition specified by
.Fa device
and returns it in a short form that can be easily used to construct
arguments within
.Xr mount 8
and similar high-level filesystem utilities.
.Pp
If the
.Fa verbose
argument is not 0,
.Fn readlabelfs
will print appropriate error messages before returning.
Otherwise, it produces no output on the terminal.
.Sh RETURN VALUES
.Fn readlabelfs
returns
.Dv NULL
upon error, or a valid filesystem type upon success.
.Sh HISTORY
.Fn readlabelfs
first appeared in
.Ox 2.0 .