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@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
dkcksum(struct disklabel * lp)52 dkcksum(struct disklabel *lp)
53 {
54 return dkcksum_sized(lp, lp->d_npartitions);
55 }
56
57 u_int
dkcksum_sized(struct disklabel * lp,size_t npartitions)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
dkwedge_read(struct disk * pdk,struct vnode * vp,daddr_t blkno,void * tbuf,size_t len)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
dkwedge_add(struct dkwedge_info * dkw)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
aprint_error(const char * format,...)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
aprint_verbose(const char * format,...)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