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geom.c revision 1.1 
      1 /*	$NetBSD: geom.c,v 1.1 2014/07/26 19:30:44 dholland 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 }
     82