Home | History | Annotate | Line # | Download | only in dkscan_bsdlabel 
      1 /* $NetBSD: dkscan_util.c,v 1.3 2013/01/01 18:44:27 dsl Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Martin Husemann <martin (at) NetBSD.org>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 #include <stdio.h>
     34 #include <unistd.h>
     35 #include <errno.h>
     36 #include <stdarg.h>
     37 #include <err.h>
     38 #include <sys/param.h>
     39 #include <sys/ioctl.h>
     40 #include <sys/proc.h>
     41 #include <sys/disk.h>
     42 #include <sys/disklabel.h>
     43 
     44 #include "dkscan_util.h"
     45 
     46 int verbose = 0;	/* are we verbose? */
     47 int no_action = 0;	/* don't do anything, just print info */
     48 int disk_fd = -1;	/* file descriptor for disk access */
     49 
     50 
     51 u_int
     52 dkcksum(struct disklabel *lp)
     53 {
     54 	return dkcksum_sized(lp, lp->d_npartitions);
     55 }
     56 
     57 u_int
     58 dkcksum_sized(struct disklabel *lp, size_t npartitions)
     59 {
     60         u_short *start, *end;
     61         u_short sum = 0;
     62 
     63         start = (u_short *)lp;
     64         end = (u_short *)&lp->d_partitions[npartitions];
     65         while (start < end)
     66                 sum ^= *start++;
     67         return (sum);
     68 }
     69 
     70 int
     71 dkwedge_read(struct disk *pdk, struct vnode *vp, daddr_t blkno,
     72 	void *tbuf, size_t len)
     73 {
     74 	if (pread(disk_fd, tbuf, len, blkno * BLOCK_SIZE) < 0)
     75 		return errno;
     76 	return 0;
     77 }
     78 
     79 int
     80 dkwedge_add(struct dkwedge_info *dkw)
     81 {
     82 	printf("wedge \"%s\" type \"%s\" start %" PRIu64 " size %" PRIu64,
     83 	    dkw->dkw_wname, dkw->dkw_ptype, dkw->dkw_offset, dkw->dkw_size);
     84 
     85 	if (no_action) {
     86 		printf("\n");
     87 		return 0;
     88 	}
     89 
     90 	if (ioctl(disk_fd, DIOCAWEDGE, dkw) == -1)
     91 		err(1, "addwedge");
     92 
     93 	printf(": %s\n", dkw->dkw_devname);
     94 	return 0;
     95 }
     96 
     97 void
     98 aprint_error(const char *format, ...)
     99 {
    100 	va_list ap;
    101 
    102 	va_start(ap, format);
    103 	vfprintf(stderr, format, ap);
    104 	va_end(ap);
    105 }
    106 
    107 void
    108 aprint_verbose(const char *format, ...)
    109 {
    110 	va_list ap;
    111 
    112 	if (!verbose) return;
    113 
    114 	va_start(ap, format);
    115 	vfprintf(stdout, format, ap);
    116 	va_end(ap);
    117 }
    118 
    119