distrib/utils/sysinst/geom.c

   1 /*      $NetBSD: geom.c,v 1.8 2003/07/07 12:30:20 dsl Exp $     */
   2
   3 /*
   4  * Copyright (c) 1995, 1997 Jason R. Thorpe.
   5  * 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed for the NetBSD Project
  18  *      by Jason R. Thorpe.
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /* Modified by Philip A. Nelson for use in sysinst. */
  36
  37 #include <sys/param.h>
  38 #include <sys/disklabel.h>
  39 #include <sys/ioctl.h>
  40 #include <fcntl.h>
  41 #include <unistd.h>
  42 #include <util.h>
  43 #include <errno.h>
  44
  45 #include "defs.h"
  46
  47 static int
  48 get_label(const char *disk, struct disklabel *l, unsigned long cmd)
  49 {
  50         char diskpath[MAXPATHLEN];
  51         int fd;
  52         int sv_errno;
  53
  54         /* Open the disk. */
  55         fd = opendisk(disk, O_RDONLY, diskpath, sizeof(diskpath), 0);
  56         if (fd < 0)
  57                 return 0;
  58
  59         if (ioctl(fd, cmd, l) < 0) {
  60                 sv_errno = errno;
  61                 (void)close(fd);
  62                 errno = sv_errno;
  63                 return 0;
  64         }
  65         (void)close(fd);
  66         return 1;
  67 }
  68
  69 int
  70 get_geom(const char *disk, struct disklabel *l)
  71 {
  72
  73         return get_label(disk, l, DIOCGDEFLABEL);
  74 }
  75
  76 int
  77 get_real_geom(const char *disk, struct disklabel *l)
  78 {
  79
  80         return get_label(disk, l, DIOCGDINFO);
  81 }