1 /*-
2 * Copyright (c) 2002 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * CRC32 code derived from work by Gary S. Brown.
27 *
28 * $FreeBSD: src/sbin/gpt/gpt.c,v 1.16 2006/07/07 02:44:23 marcel Exp $
29 */
30
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/stat.h>
34 #include <sys/diskslice.h>
35
36 #include <err.h>
37 #include <errno.h>
38 #include <fcntl.h>
39 #include <paths.h>
40 #include <stddef.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 #include "map.h"
47 #include "gpt.h"
48
49 char *device_name;
50
51 off_t mediasz;
52
53 u_int parts;
54 u_int secsz;
55
56 int readonly, verbose;
57
58 static uint32_t crc32_tab[] = {
59 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
60 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
61 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
62 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
63 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
64 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
65 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
66 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
67 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
68 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
69 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
70 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
71 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
72 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
73 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
74 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
75 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
76 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
77 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
78 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
79 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
80 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
81 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
82 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
83 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
84 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
85 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
86 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
87 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
88 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
89 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
90 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
91 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
92 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
93 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
94 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
95 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
96 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
97 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
98 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
99 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
100 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
101 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
102 };
103
104 uint32_t
crc32(const void * buf,size_t size)105 crc32(const void *buf, size_t size)
106 {
107 const uint8_t *p;
108 uint32_t crc;
109
110 p = buf;
111 crc = ~0U;
112
113 while (size--)
114 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
115
116 return crc ^ ~0U;
117 }
118
119 uint8_t *
utf16_to_utf8(uint16_t * s16)120 utf16_to_utf8(uint16_t *s16)
121 {
122 static uint8_t *s8 = NULL;
123 static size_t s8len = 0;
124 size_t s8idx, s16idx, s16len;
125 uint32_t utfchar;
126 unsigned int c;
127
128 s16len = 0;
129 while (s16[s16len++] != 0)
130 ;
131 if (s8len < s16len * 3) {
132 if (s8 != NULL)
133 free(s8);
134 s8len = s16len * 3;
135 s8 = calloc(s16len, 3);
136 }
137 s8idx = s16idx = 0;
138 while (s16idx < s16len) {
139 utfchar = le16toh(s16[s16idx++]);
140 if ((utfchar & 0xf800) == 0xd800) {
141 c = le16toh(s16[s16idx]);
142 if ((utfchar & 0x400) != 0 || (c & 0xfc00) != 0xdc00)
143 utfchar = 0xfffd;
144 else
145 s16idx++;
146 }
147 if (utfchar < 0x80) {
148 s8[s8idx++] = utfchar;
149 } else if (utfchar < 0x800) {
150 s8[s8idx++] = 0xc0 | (utfchar >> 6);
151 s8[s8idx++] = 0x80 | (utfchar & 0x3f);
152 } else if (utfchar < 0x10000) {
153 s8[s8idx++] = 0xe0 | (utfchar >> 12);
154 s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
155 s8[s8idx++] = 0x80 | (utfchar & 0x3f);
156 } else if (utfchar < 0x200000) {
157 s8[s8idx++] = 0xf0 | (utfchar >> 18);
158 s8[s8idx++] = 0x80 | ((utfchar >> 12) & 0x3f);
159 s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
160 s8[s8idx++] = 0x80 | (utfchar & 0x3f);
161 }
162 }
163 return (s8);
164 }
165
166 void
utf8_to_utf16(const uint8_t * s8,uint16_t * s16,size_t s16len)167 utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
168 {
169 size_t s16idx, s8idx, s8len;
170 uint32_t utfchar;
171 unsigned int c, utfbytes;
172
173 s8len = 0;
174 while (s8[s8len++] != 0)
175 ;
176 s8idx = s16idx = 0;
177 utfbytes = 0;
178 do {
179 utfchar = 0;
180 c = s8[s8idx++];
181 if ((c & 0xc0) != 0x80) {
182 /* Initial characters. */
183 if (utfbytes != 0) {
184 /* Incomplete encoding. */
185 s16[s16idx++] = 0xfffd;
186 if (s16idx == s16len) {
187 s16[--s16idx] = 0;
188 return;
189 }
190 }
191 if ((c & 0xf8) == 0xf0) {
192 utfchar = c & 0x07;
193 utfbytes = 3;
194 } else if ((c & 0xf0) == 0xe0) {
195 utfchar = c & 0x0f;
196 utfbytes = 2;
197 } else if ((c & 0xe0) == 0xc0) {
198 utfchar = c & 0x1f;
199 utfbytes = 1;
200 } else {
201 utfchar = c & 0x7f;
202 utfbytes = 0;
203 }
204 } else {
205 /* Followup characters. */
206 if (utfbytes > 0) {
207 utfchar = (utfchar << 6) + (c & 0x3f);
208 utfbytes--;
209 } else if (utfbytes == 0)
210 utfbytes = -1;
211 }
212 if (utfbytes == 0) {
213 if (utfchar >= 0x10000 && s16idx + 2 >= s16len)
214 utfchar = 0xfffd;
215 if (utfchar >= 0x10000) {
216 s16[s16idx++] = 0xd800 | ((utfchar>>10)-0x40);
217 s16[s16idx++] = 0xdc00 | (utfchar & 0x3ff);
218 } else
219 s16[s16idx++] = utfchar;
220 if (s16idx == s16len) {
221 s16[--s16idx] = 0;
222 return;
223 }
224 }
225 } while (c != 0);
226 }
227
228 void
le_uuid_dec(void const * buf,uuid_t * uuid)229 le_uuid_dec(void const *buf, uuid_t *uuid)
230 {
231 u_char const *p;
232 int i;
233
234 p = buf;
235 uuid->time_low = le32dec(p);
236 uuid->time_mid = le16dec(p + 4);
237 uuid->time_hi_and_version = le16dec(p + 6);
238 uuid->clock_seq_hi_and_reserved = p[8];
239 uuid->clock_seq_low = p[9];
240 for (i = 0; i < _UUID_NODE_LEN; i++)
241 uuid->node[i] = p[10 + i];
242 }
243
244 void
le_uuid_enc(void * buf,uuid_t const * uuid)245 le_uuid_enc(void *buf, uuid_t const *uuid)
246 {
247 u_char *p;
248 int i;
249
250 p = buf;
251 le32enc(p, uuid->time_low);
252 le16enc(p + 4, uuid->time_mid);
253 le16enc(p + 6, uuid->time_hi_and_version);
254 p[8] = uuid->clock_seq_hi_and_reserved;
255 p[9] = uuid->clock_seq_low;
256 for (i = 0; i < _UUID_NODE_LEN; i++)
257 p[10 + i] = uuid->node[i];
258 }
259
260 int
parse_uuid(const char * s,uuid_t * uuid)261 parse_uuid(const char *s, uuid_t *uuid)
262 {
263 uint32_t status;
264 uuid_t tmp;
265
266 uuid_from_string(s, uuid, &status);
267 if (status == uuid_s_ok)
268 return (0);
269
270 switch (*s) {
271 case 'd':
272 if (strcmp(s, "dfly") == 0 || strcmp(s, "dragonfly") == 0) {
273 s = "DragonFly Label64";
274 /* fall through to lookup at end */
275 }
276 break;
277 case 'e':
278 if (strcmp(s, "efi") == 0) {
279 uuid_t efi = GPT_ENT_TYPE_EFI;
280 *uuid = efi;
281 return (0);
282 }
283 break;
284 case 'h':
285 if (strcmp(s, "hammer2") == 0) {
286 uuid_t hammer2 = GPT_ENT_TYPE_DRAGONFLY_HAMMER2;
287 *uuid = hammer2;
288 return (0);
289 }
290 if (strcmp(s, "hammer") == 0) {
291 uuid_t hammer = GPT_ENT_TYPE_DRAGONFLY_HAMMER;
292 *uuid = hammer;
293 return (0);
294 }
295 if (strcmp(s, "hfs") == 0) {
296 uuid_t hfs = GPT_ENT_TYPE_APPLE_HFS;
297 *uuid = hfs;
298 return (0);
299 }
300 break;
301 case 'l':
302 if (strcmp(s, "linux") == 0) {
303 uuid_t lnx = GPT_ENT_TYPE_MS_BASIC_DATA;
304 *uuid = lnx;
305 return (0);
306 }
307 break;
308 case 's':
309 if (strcmp(s, "swap") == 0) {
310 uuid_t sw = GPT_ENT_TYPE_FREEBSD_SWAP;
311 *uuid = sw;
312 return (0);
313 }
314 break;
315 case 'u':
316 if (strcmp(s, "ufs") == 0) {
317 uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
318 *uuid = ufs;
319 return (0);
320 }
321 break;
322 case 'w':
323 if (strcmp(s, "windows") == 0) {
324 uuid_t win = GPT_ENT_TYPE_MS_BASIC_DATA;
325 *uuid = win;
326 return (0);
327 }
328 break;
329 }
330
331 uuid_name_lookup(&tmp, s, &status);
332 if (status == uuid_s_ok) {
333 *uuid = tmp;
334 return(0);
335 }
336
337 return (EINVAL);
338 }
339
340 void*
gpt_read(int fd,off_t lba,size_t count)341 gpt_read(int fd, off_t lba, size_t count)
342 {
343 off_t ofs;
344 void *buf;
345
346 count *= secsz;
347 buf = malloc(count);
348 if (buf == NULL)
349 return (NULL);
350
351 ofs = lba * secsz;
352 if (lseek(fd, ofs, SEEK_SET) == ofs &&
353 read(fd, buf, count) == (ssize_t)count)
354 return (buf);
355
356 free(buf);
357 return (NULL);
358 }
359
360 int
gpt_write(int fd,map_t * map)361 gpt_write(int fd, map_t *map)
362 {
363 off_t ofs;
364 size_t count;
365
366 count = map->map_size * secsz;
367 ofs = map->map_start * secsz;
368 if (lseek(fd, ofs, SEEK_SET) == ofs &&
369 write(fd, map->map_data, count) == (ssize_t)count)
370 return (0);
371 return (-1);
372 }
373
374 static int
gpt_mbr(int fd,off_t lba)375 gpt_mbr(int fd, off_t lba)
376 {
377 struct mbr *mbr;
378 map_t *m, *p;
379 off_t size, start;
380 unsigned int i, pmbr;
381
382 mbr = gpt_read(fd, lba, 1);
383 if (mbr == NULL)
384 return (-1);
385
386 if (mbr->mbr_sig != htole16(MBR_SIG)) {
387 if (verbose)
388 warnx("%s: MBR not found at sector %llu", device_name,
389 (long long)lba);
390 free(mbr);
391 return (0);
392 }
393
394 /*
395 * Differentiate between a regular MBR and a PMBR. This is more
396 * convenient in general. A PMBR is one with a single partition
397 * of type 0xee.
398 */
399 pmbr = 0;
400 for (i = 0; i < 4; i++) {
401 if (mbr->mbr_part[i].part_typ == 0)
402 continue;
403 if (mbr->mbr_part[i].part_typ == 0xee)
404 pmbr++;
405 else
406 break;
407 }
408 if (pmbr && (i == 1 || i == 4) && lba == 0) {
409 if (pmbr != 1)
410 warnx("%s: Suspicious PMBR at sector %llu",
411 device_name, (long long)lba);
412 else if (verbose > 1)
413 warnx("%s: PMBR at sector %llu", device_name,
414 (long long)lba);
415 p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr);
416 return ((p == NULL) ? -1 : 0);
417 }
418 if (pmbr)
419 warnx("%s: Suspicious MBR at sector %llu", device_name,
420 (long long)lba);
421 else if (verbose > 1)
422 warnx("%s: MBR at sector %llu", device_name, (long long)lba);
423
424 p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr);
425 if (p == NULL)
426 return (-1);
427 for (i = 0; i < 4; i++) {
428 if (mbr->mbr_part[i].part_typ == 0 ||
429 mbr->mbr_part[i].part_typ == 0xee)
430 continue;
431 start = le16toh(mbr->mbr_part[i].part_start_hi);
432 start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo);
433 size = le16toh(mbr->mbr_part[i].part_size_hi);
434 size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo);
435 if (start == 0 && size == 0) {
436 warnx("%s: Malformed MBR at sector %llu", device_name,
437 (long long)lba);
438 continue;
439 }
440 /* start is relative to the offset of the MBR itself. */
441 start += lba;
442 if (verbose > 2)
443 warnx("%s: MBR part: type=%d, start=%llu, size=%llu",
444 device_name, mbr->mbr_part[i].part_typ,
445 (long long)start, (long long)size);
446 if (mbr->mbr_part[i].part_typ != 15) {
447 m = map_add(start, size, MAP_TYPE_MBR_PART, p);
448 if (m == NULL)
449 return (-1);
450 m->map_index = i;
451 } else {
452 if (gpt_mbr(fd, start) == -1)
453 return (-1);
454 }
455 }
456 return (0);
457 }
458
459 static int
gpt_gpt(int fd,off_t lba)460 gpt_gpt(int fd, off_t lba)
461 {
462 uuid_t type;
463 off_t size;
464 struct gpt_ent *ent;
465 struct gpt_hdr *hdr;
466 char *p, *s;
467 map_t *m;
468 size_t blocks, tblsz;
469 unsigned int i;
470 uint32_t crc;
471
472 hdr = gpt_read(fd, lba, 1);
473 if (hdr == NULL)
474 return (-1);
475
476 if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)))
477 goto fail_hdr;
478
479 crc = le32toh(hdr->hdr_crc_self);
480 hdr->hdr_crc_self = 0;
481 if (crc32(hdr, le32toh(hdr->hdr_size)) != crc) {
482 if (verbose)
483 warnx("%s: Bad CRC in GPT header at sector %llu",
484 device_name, (long long)lba);
485 goto fail_hdr;
486 }
487
488 tblsz = le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz);
489 blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0);
490
491 /* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */
492 p = gpt_read(fd, le64toh(hdr->hdr_lba_table), blocks);
493 if (p == NULL)
494 return (-1);
495
496 if (crc32(p, tblsz) != le32toh(hdr->hdr_crc_table)) {
497 if (verbose)
498 warnx("%s: Bad CRC in GPT table at sector %llu",
499 device_name,
500 (long long)le64toh(hdr->hdr_lba_table));
501 goto fail_ent;
502 }
503
504 if (verbose > 1)
505 warnx("%s: %s GPT at sector %llu", device_name,
506 (lba == 1) ? "Pri" : "Sec", (long long)lba);
507
508 m = map_add(lba, 1, (lba == 1)
509 ? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr);
510 if (m == NULL)
511 return (-1);
512
513 m = map_add(le64toh(hdr->hdr_lba_table), blocks, (lba == 1)
514 ? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p);
515 if (m == NULL)
516 return (-1);
517
518 if (lba != 1)
519 return (0);
520
521 for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
522 ent = (void*)(p + i * le32toh(hdr->hdr_entsz));
523 if (uuid_is_nil(&ent->ent_type, NULL))
524 continue;
525
526 size = le64toh(ent->ent_lba_end) - le64toh(ent->ent_lba_start) +
527 1LL;
528 if (verbose > 2) {
529 le_uuid_dec(&ent->ent_type, &type);
530 uuid_to_string(&type, &s, NULL);
531 warnx(
532 "%s: GPT partition: type=%s, start=%llu, size=%llu", device_name, s,
533 (long long)le64toh(ent->ent_lba_start),
534 (long long)size);
535 free(s);
536 }
537 m = map_add(le64toh(ent->ent_lba_start), size,
538 MAP_TYPE_GPT_PART, ent);
539 if (m == NULL)
540 return (-1);
541 m->map_index = i;
542 }
543 return (0);
544
545 fail_ent:
546 free(p);
547
548 fail_hdr:
549 free(hdr);
550 return (0);
551 }
552
553 int
gpt_open(const char * dev)554 gpt_open(const char *dev)
555 {
556 struct stat sb;
557 static char device_path[MAXPATHLEN];
558 int fd, mode;
559
560 mode = readonly ? O_RDONLY : O_RDWR|O_EXCL;
561
562 strlcpy(device_path, dev, sizeof(device_path));
563 device_name = device_path;
564
565 if ((fd = open(device_path, mode)) != -1)
566 goto found;
567
568 snprintf(device_path, sizeof(device_path), "%s%s", _PATH_DEV, dev);
569 device_name = device_path + strlen(_PATH_DEV);
570 if ((fd = open(device_path, mode)) != -1)
571 goto found;
572
573 return (-1);
574
575 found:
576 if (fstat(fd, &sb) == -1)
577 goto close;
578
579 if ((sb.st_mode & S_IFMT) != S_IFREG) {
580 struct partinfo partinfo;
581
582 if (ioctl(fd, DIOCGPART, &partinfo) < 0)
583 goto close;
584 secsz = partinfo.media_blksize;
585 mediasz = partinfo.media_size;
586 } else {
587 secsz = 512; /* Fixed size for files. */
588 if (sb.st_size % secsz) {
589 errno = EINVAL;
590 goto close;
591 }
592 mediasz = sb.st_size;
593 }
594
595 /*
596 * We require an absolute minimum of 6 sectors. One for the MBR,
597 * 2 for the GPT header, 2 for the GPT table and one to hold some
598 * user data. Let's catch this extreme border case here so that
599 * we don't have to worry about it later.
600 */
601 if (mediasz / secsz < 6) {
602 errno = ENODEV;
603 goto close;
604 }
605
606 if (verbose)
607 warnx("%s: mediasize=%llu; sectorsize=%u; blocks=%llu",
608 device_name, (long long)mediasz, secsz,
609 (long long)(mediasz / secsz));
610
611 map_init(mediasz / secsz);
612
613 if (gpt_mbr(fd, 0LL) == -1)
614 goto close;
615 if (gpt_gpt(fd, 1LL) == -1)
616 goto close;
617 if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
618 goto close;
619
620 return (fd);
621
622 close:
623 close(fd);
624 return (-1);
625 }
626
627 void
gpt_close(int fd)628 gpt_close(int fd)
629 {
630 /* XXX post processing? */
631 close(fd);
632 }
633
634 #ifndef _LIBEFIVAR
635 static struct {
636 int (*fptr)(int, char *[]);
637 const char *name;
638 } cmdsw[] = {
639 { cmd_add, "add" },
640 { cmd_boot, "boot" },
641 { cmd_create, "create" },
642 { cmd_destroy, "destroy" },
643 { cmd_expand, "expand" },
644 { NULL, "help" },
645 { cmd_init, "init" },
646 { cmd_label, "label" },
647 { cmd_migrate, "migrate" },
648 { cmd_recover, "recover" },
649 { cmd_remove, "remove" },
650 { NULL, "rename" },
651 { cmd_show, "show" },
652 { NULL, "verify" },
653 { NULL, NULL }
654 };
655
656 static void
usage(void)657 usage(void)
658 {
659 const char *prgname = getprogname();
660
661 fprintf(stderr,
662 "usage: %s [-rv] [-p nparts] <command> [options] <device> ...\n"
663 " %s show <device>\n",
664 prgname, prgname);
665 exit(1);
666 }
667
668 static void
prefix(const char * cmd)669 prefix(const char *cmd)
670 {
671 char *pfx;
672 const char *prg;
673
674 prg = getprogname();
675 pfx = malloc(strlen(prg) + strlen(cmd) + 2);
676 /* Don't bother failing. It's not important */
677 if (pfx == NULL)
678 return;
679
680 sprintf(pfx, "%s %s", prg, cmd);
681 setprogname(pfx);
682 }
683
684 int
main(int argc,char * argv[])685 main(int argc, char *argv[])
686 {
687 char *cmd, *p;
688 int ch, i;
689
690 /* Get the generic options */
691 while ((ch = getopt(argc, argv, "p:rv")) != -1) {
692 switch(ch) {
693 case 'p':
694 if (parts > 0)
695 usage();
696 parts = strtol(optarg, &p, 10);
697 if (*p != 0 || parts < 1)
698 usage();
699 break;
700 case 'r':
701 readonly = 1;
702 break;
703 case 'v':
704 verbose++;
705 break;
706 default:
707 usage();
708 }
709 }
710 if (!parts)
711 parts = 128;
712
713 if (argc == optind)
714 usage();
715
716 cmd = argv[optind++];
717 for (i = 0; cmdsw[i].name != NULL && strcmp(cmd, cmdsw[i].name); i++);
718
719 if (cmdsw[i].fptr == NULL)
720 errx(1, "unknown command: %s", cmd);
721
722 prefix(cmd);
723 return ((*cmdsw[i].fptr)(argc, argv));
724 }
725 #endif /* !_LIBEFIVAR */
726