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.\" $OpenBSD: readlabelfs.3,v 1.6 2003/10/22 07:45:53 jmc Exp $
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.\"
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.\" Copyright (c) 1996, Jason Downs. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
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.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd December 22, 1996
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.Dt READLABELFS 3
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.Os
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.Sh NAME
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.Nm readlabelfs
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.Nd read disklabel filesystem type
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.Sh SYNOPSIS
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.Fd #include <util.h>
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.Ft char *
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.Fn readlabelfs "char *device" "int verbose"
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.Sh DESCRIPTION
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The
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.Fn readlabelfs
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function attempts to determine the filesystem type of the disk
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partition specified by
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.Fa device
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and returns it in a short form that can be easily used to construct
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arguments within
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.Xr mount 8
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and similar high-level filesystem utilities.
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.Pp
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If the
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.Fa verbose
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argument is not 0,
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.Fn readlabelfs
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will print appropriate error messages before returning.
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Otherwise, it produces no output on the terminal.
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.Sh RETURN VALUES
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.Fn readlabelfs
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returns
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.Dv NULL
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upon error, or a valid filesystem type upon success.
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.Sh HISTORY
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.Fn readlabelfs
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first appeared in
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.Ox 2.0 .
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