disklabel.c

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    1 /*      $NetBSD: disklabel.c,v 1.6 2003/08/07 16:32:26 agc Exp $        */
    2 
    3 /*-
    4  * Copyright (c) 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)disklabel.c 8.1 (Berkeley) 6/11/93
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/disklabel.h>
   36 #include "stand.h"
   37 
   38 char *
   39 getdisklabel(buf, lp)
   40         const char *buf;
   41         struct disklabel *lp;
   42 {
   43         struct disklabel *dlp, *elp;
   44         char *msg = (char *)0;
   45 
   46         elp = (struct disklabel *)(buf + DEV_BSIZE - sizeof(*dlp));
   47         for (dlp = (struct disklabel *)buf; dlp <= elp;
   48             dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
   49                 if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
   50 #if defined(LIBSA_NO_DISKLABEL_MSGS)
   51                         msg = (char *)1;
   52 #else
   53                         if (msg == (char *)0)
   54                                 msg = "no disk label";
   55 #endif
   56                 } else if (dlp->d_npartitions > MAXPARTITIONS ||
   57                            dkcksum(dlp) != 0)
   58 #if defined(LIBSA_NO_DISKLABEL_MSGS)
   59                         msg = (char *)1;
   60 #else
   61                         msg = "disk label corrupted";
   62 #endif
   63                 else {
   64                         bcopy(dlp, lp, sizeof *lp);
   65                         msg = (char *)0;
   66                         break;
   67                 }
   68         }
   69         return (msg);
   70 }

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FreeBSD/Linux Kernel Cross Reference sys/lib/libsa/disklabel.c

FreeBSD/Linux Kernel Cross Reference
sys/lib/libsa/disklabel.c