123 lines
4.1 KiB
Groff
123 lines
4.1 KiB
Groff
.\" $NetBSD: ahdi_readlabel.3,v 1.1 2000/02/05 20:40:38 jdc Exp $
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.\"
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.\" Copyright (c) 1998 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Julian Coleman.
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 5, 2000
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.Dt ahdi_readlabel 3
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.Sh NAME
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.Nm ahdi_readlabel
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.Nd read AHDI partition label from disk
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.Sh LIBRARY
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.Lb libahdi
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.Sh SYNOPSIS
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.Fd #include <libahdi.h>
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.Ft int
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.Fn ahdi_readlabel "struct ahdi_ptable *ptable" "char *diskname" "int flags"
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.Sh DESCRIPTION
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The
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.Nm
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function reads an AHDI partitioned disk and places the AHDI partition label
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into
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.Em ptable .
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Partition letters are first assigned sequentially to partitions that have
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the id `NBD' and then sequentially to other partitions. Partition `b' will
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only be assigned if a partition with the id `SWP' exists. Partition `c' is
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reserved for the whole disk.
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.Pp
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The function takes the following flags:
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.Bl -column "AHDI_IGN_EXISTS" "Result" -offset indent
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.It Em Flag Ta Em Result
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.It Li FORCE_AHDI Ta
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Read AHDI label even if NetBSD label exists
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.It Li AHDI_IGN_EXISTS Ta
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Ignore partition exists flag and assume all partitions are real
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.It Li AHDI_IGN_EXT Ta
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Ignore final extended partition pointer
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.It Li AHDI_IGN_CKSUM Ta
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Ignore mismatch between on-disk and calculated checksums
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.It Li AHDI_IGN_SPU Ta
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Ignore total sectors from root sector if different from that reported by the disk
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.El
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.Pp
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The
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.Nm
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function will try to open
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.Em diskname ,
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.Li then r Ns Em diskname Ns c,
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.Li then /dev/r Ns Em diskname Ns c .
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.Sh DIAGNOSTICS
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The
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.Nm
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function returns the following codes:
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.Bl -column "Code" "Meaning" -offset indent
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.It Em Code Ta Em Meaning
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.It Li 1 Ta
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OK
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.It Li -1 Ta
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System call error (see value of errno)
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.It Li -2 Ta
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Device is not 512 bytes/sector
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.It Li -3 Ta
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No AHDI partitions found (or disk has valid NetBSD partitions)
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.It Li -4 Ta
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AHDI checksum error (on disk different from calculated)
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.It Li -5 Ta
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Bogus final extended partition (does not point to auxiliary root)
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.It Li -6 Ta
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AHDI total sectors does not match device total sectors
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.El
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.Sh SEE ALSO
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.Xr errno 2 ,
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.Xr ahdi_buildlabel 3 ,
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.Xr ahdi_checklabel 3 ,
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.Xr ahdi_writedisktab 3 ,
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.Xr ahdi_writelabel 3 ,
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.Xr ahdi 4
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.Sh HISTORY
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The
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.Nm libahdi
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package appeared in
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.Nx 1.5 .
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.Sh AUTHORS
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.An Julian Coleman, Waldi Ravens, Leo Weppelman
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.Sh BUGS
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The
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.Nm
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function does not recognise the (deprecated) partition ID's
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.Em NBR ,
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.Em NBU
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or
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.Em NBS .
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