1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
/* $OpenBSD: fdisk.c,v 1.132 2021/08/07 13:33:12 krw Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/disklabel.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "part.h"
#include "disk.h"
#include "mbr.h"
#include "misc.h"
#include "user.h"
#include "gpt.h"
#define INIT_GPT 1
#define INIT_GPTPARTITIONS 2
#define INIT_MBR 3
#define INIT_MBRBOOTCODE 4
#define _PATH_MBR _PATH_BOOTDIR "mbr"
static unsigned char builtin_mbr[] = {
#include "mbrcode.h"
};
int y_flag;
void parse_bootprt(const char *);
void get_default_dmbr(const char *, struct dos_mbr *);
static void
usage(void)
{
extern char * __progname;
fprintf(stderr, "usage: %s "
"[-evy] [-A | -g | -i | -u] [-b blocks[@offset[:type]]]\n"
"\t[-l blocks | -c cylinders -h heads -s sectors] [-f mbrfile] disk\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
struct mbr mbr;
#ifdef HAS_MBR
const char *mbrfile = _PATH_MBR;
#else
const char *mbrfile = NULL;
#endif
int ch, error;
int e_flag = 0, init = 0;
int verbosity = TERSE;
int oflags = O_RDONLY;
while ((ch = getopt(argc, argv, "Aieguvf:c:h:s:l:b:y")) != -1) {
const char *errstr;
switch(ch) {
case 'A':
init = INIT_GPTPARTITIONS;
break;
case 'i':
init = INIT_MBR;
break;
case 'g':
init = INIT_GPT;
break;
case 'u':
init = INIT_MBRBOOTCODE;
break;
case 'e':
e_flag = 1;
break;
case 'f':
mbrfile = optarg;
break;
case 'c':
disk.dk_cylinders = strtonum(optarg, 1, 262144, &errstr);
if (errstr)
errx(1, "Cylinder argument %s [1..262144].",
errstr);
disk.dk_size = 0;
break;
case 'h':
disk.dk_heads = strtonum(optarg, 1, 256, &errstr);
if (errstr)
errx(1, "Head argument %s [1..256].", errstr);
disk.dk_size = 0;
break;
case 's':
disk.dk_sectors = strtonum(optarg, 1, 63, &errstr);
if (errstr)
errx(1, "Sector argument %s [1..63].", errstr);
disk.dk_size = 0;
break;
case 'b':
parse_bootprt(optarg);
break;
case 'l':
disk.dk_size = strtonum(optarg, BLOCKALIGNMENT, UINT32_MAX, &errstr);
if (errstr)
errx(1, "Block argument %s [%u..%u].", errstr,
BLOCKALIGNMENT, UINT32_MAX);
disk.dk_cylinders = disk.dk_heads = disk.dk_sectors = 0;
break;
case 'y':
y_flag = 1;
break;
case 'v':
verbosity = VERBOSE;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
if ((disk.dk_cylinders || disk.dk_heads || disk.dk_sectors) &&
(disk.dk_cylinders * disk.dk_heads * disk.dk_sectors == 0))
usage();
if (init || e_flag)
oflags = O_RDWR;
DISK_open(argv[0], oflags);
if (oflags == O_RDONLY) {
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
USER_print_disk(verbosity);
goto done;
}
/* "proc exec" for man page display */
if (pledge("stdio rpath wpath disklabel proc exec", NULL) == -1)
err(1, "pledge");
get_default_dmbr(mbrfile, &default_dmbr);
switch (init) {
case INIT_GPT:
GPT_init(GHANDGP);
if (ask_yn("Do you wish to write new GPT?"))
GPT_write();
break;
case INIT_GPTPARTITIONS:
if (GPT_read(ANYGPT))
errx(1, "-A requires a valid GPT");
GPT_init(GPONLY);
if (ask_yn("Do you wish to write new GPT?"))
GPT_write();
break;
case INIT_MBR:
mbr.mbr_lba_self = mbr.mbr_lba_firstembr = 0;
MBR_init(&mbr);
if (ask_yn("Do you wish to write new MBR?"))
MBR_write(&mbr);
break;
case INIT_MBRBOOTCODE:
error = MBR_read(0, 0, &mbr);
if (error)
errx(1, "Can't read MBR!");
memcpy(mbr.mbr_code, default_dmbr.dmbr_boot,
sizeof(mbr.mbr_code));
if (ask_yn("Do you wish to write new MBR?"))
MBR_write(&mbr);
break;
default:
break;
}
if (e_flag)
USER_edit(0, 0);
done:
close(disk.dk_fd);
return 0;
}
void
parse_bootprt(const char *arg)
{
const char *errstr;
char *poffset, *ptype;
uint32_t blockcount, blockoffset;
uint8_t partitiontype;
blockoffset = BLOCKALIGNMENT;
partitiontype = DOSPTYP_EFISYS;
ptype = NULL;
/* First number: # of 512-byte blocks in boot partition. */
poffset = strchr(arg, '@');
if (poffset != NULL)
*poffset++ = '\0';
if (poffset != NULL) {
ptype = strchr(poffset, ':');
if (ptype != NULL)
*ptype++ = '\0';
}
blockcount = strtonum(arg, BLOCKALIGNMENT, UINT32_MAX, &errstr);
if (errstr)
errx(1, "Block argument %s [%u..%u].", errstr, BLOCKALIGNMENT,
UINT32_MAX);
if (poffset == NULL)
goto done;
/* Second number: # of 512-byte blocks to offset partition start. */
blockoffset = strtonum(poffset, BLOCKALIGNMENT, UINT32_MAX, &errstr);
if (errstr)
errx(1, "Block offset argument %s [%u..%u].", errstr,
BLOCKALIGNMENT, UINT32_MAX);
if (ptype == NULL)
goto done;
if (strlen(ptype) != 2 || !(isxdigit(*ptype) && isxdigit(*(ptype + 1))))
errx(1, "Block type is not 2 digit hex value");
partitiontype = strtol(ptype, NULL, 16);
done:
disk.dk_bootprt.prt_ns = blockcount;
disk.dk_bootprt.prt_bs = blockoffset;
disk.dk_bootprt.prt_id = partitiontype;
}
void
get_default_dmbr(const char *mbrfile, struct dos_mbr *dmbr)
{
ssize_t len;
int fd;
if (mbrfile == NULL) {
memcpy(dmbr, builtin_mbr, sizeof(*dmbr));
} else {
fd = open(mbrfile, O_RDONLY);
if (fd == -1) {
warn("%s", mbrfile);
warnx("using builtin MBR");
memcpy(dmbr, builtin_mbr, sizeof(*dmbr));
} else {
len = read(fd, dmbr, sizeof(*dmbr));
close(fd);
if (len == -1)
err(1, "Unable to read MBR from '%s'", mbrfile);
else if (len != sizeof(*dmbr))
errx(1, "Unable to read complete MBR from '%s'",
mbrfile);
}
}
}
|
