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
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: src/sbin/gpt/gpt.c,v 1.16.2.4.6.1 2010/02/10 00:26:20 kensmith Exp $");
31
32#include <sys/param.h>
33#include <sys/types.h>
34#include <sys/disk.h>
35#include <sys/stat.h>
36
37#include <err.h>
38#include <errno.h>
39#include <fcntl.h>
40#include <paths.h>
41#include <stddef.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <unistd.h>
46
47#include "map.h"
48#include "gpt.h"
49
50char	device_path[MAXPATHLEN];
51char	*device_name;
52
53off_t	mediasz;
54
55u_int	parts;
56u_int	secsz;
57
58int	readonly, verbose;
59
60static uint32_t crc32_tab[] = {
61	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
62	0xe963a535, 0x9e6495a3,	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
63	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
64	0xf3b97148, 0x84be41de,	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
65	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,	0x14015c4f, 0x63066cd9,
66	0xfa0f3d63, 0x8d080df5,	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
67	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,	0x35b5a8fa, 0x42b2986c,
68	0xdbbbc9d6, 0xacbcf940,	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
69	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
70	0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
71	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,	0x76dc4190, 0x01db7106,
72	0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
73	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
74	0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
75	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
76	0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
77	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
78	0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
79	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
80	0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
81	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
82	0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
83	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
84	0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
85	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
86	0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
87	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
88	0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
89	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
90	0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
91	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
92	0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
93	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
94	0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
95	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
96	0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
97	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
98	0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
99	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
100	0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
101	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
102	0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
103	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
104};
105
106uint32_t
107crc32(const void *buf, size_t size)
108{
109	const uint8_t *p;
110	uint32_t crc;
111
112	p = buf;
113	crc = ~0U;
114
115	while (size--)
116		crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
117
118	return crc ^ ~0U;
119}
120
121uint8_t *
122utf16_to_utf8(uint16_t *s16)
123{
124	static uint8_t *s8 = NULL;
125	static size_t s8len = 0;
126	size_t s8idx, s16idx, s16len;
127	uint32_t utfchar;
128	unsigned int c;
129
130	s16len = 0;
131	while (s16[s16len++] != 0)
132		;
133	if (s8len < s16len * 3) {
134		if (s8 != NULL)
135			free(s8);
136		s8len = s16len * 3;
137		s8 = calloc(s16len, 3);
138	}
139	s8idx = s16idx = 0;
140	while (s16idx < s16len) {
141		utfchar = le16toh(s16[s16idx++]);
142		if ((utfchar & 0xf800) == 0xd800) {
143			c = le16toh(s16[s16idx]);
144			if ((utfchar & 0x400) != 0 || (c & 0xfc00) != 0xdc00)
145				utfchar = 0xfffd;
146			else
147				s16idx++;
148		}
149		if (utfchar < 0x80) {
150			s8[s8idx++] = utfchar;
151		} else if (utfchar < 0x800) {
152			s8[s8idx++] = 0xc0 | (utfchar >> 6);
153			s8[s8idx++] = 0x80 | (utfchar & 0x3f);
154		} else if (utfchar < 0x10000) {
155			s8[s8idx++] = 0xe0 | (utfchar >> 12);
156			s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
157			s8[s8idx++] = 0x80 | (utfchar & 0x3f);
158		} else if (utfchar < 0x200000) {
159			s8[s8idx++] = 0xf0 | (utfchar >> 18);
160			s8[s8idx++] = 0x80 | ((utfchar >> 12) & 0x3f);
161			s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
162			s8[s8idx++] = 0x80 | (utfchar & 0x3f);
163		}
164	}
165	return (s8);
166}
167
168void
169utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
170{
171	size_t s16idx, s8idx, s8len;
172	uint32_t utfchar = 0;
173	unsigned int c, utfbytes;
174
175	s8len = 0;
176	while (s8[s8len++] != 0)
177		;
178	s8idx = s16idx = 0;
179	utfbytes = 0;
180	do {
181		c = s8[s8idx++];
182		if ((c & 0xc0) != 0x80) {
183			/* Initial characters. */
184			if (utfbytes != 0) {
185				/* Incomplete encoding. */
186				s16[s16idx++] = htole16(0xfffd);
187				if (s16idx == s16len) {
188					s16[--s16idx] = 0;
189					return;
190				}
191			}
192			if ((c & 0xf8) == 0xf0) {
193				utfchar = c & 0x07;
194				utfbytes = 3;
195			} else if ((c & 0xf0) == 0xe0) {
196				utfchar = c & 0x0f;
197				utfbytes = 2;
198			} else if ((c & 0xe0) == 0xc0) {
199				utfchar = c & 0x1f;
200				utfbytes = 1;
201			} else {
202				utfchar = c & 0x7f;
203				utfbytes = 0;
204			}
205		} else {
206			/* Followup characters. */
207			if (utfbytes > 0) {
208				utfchar = (utfchar << 6) + (c & 0x3f);
209				utfbytes--;
210			} else if (utfbytes == 0)
211				utfbytes = -1;
212		}
213		if (utfbytes == 0) {
214			if (utfchar >= 0x10000 && s16idx + 2 >= s16len)
215				utfchar = 0xfffd;
216			if (utfchar >= 0x10000) {
217				s16[s16idx++] = htole16(0xd800 | ((utfchar>>10)-0x40));
218				s16[s16idx++] = htole16(0xdc00 | (utfchar & 0x3ff));
219			} else
220				s16[s16idx++] = htole16(utfchar);
221			if (s16idx == s16len) {
222				s16[--s16idx] = 0;
223				return;
224			}
225		}
226	} while (c != 0);
227}
228
229void
230le_uuid_dec(void const *buf, uuid_t *uuid)
231{
232#ifdef __APPLE__
233	*((uint32_t *)uuid + 0) = OSSwapInt32(*((uint32_t *)buf + 0));
234	*((uint16_t *)uuid + 2) = OSSwapInt16(*((uint16_t *)buf + 2));
235	*((uint16_t *)uuid + 3) = OSSwapInt16(*((uint16_t *)buf + 3));
236	*((uint64_t *)uuid + 1) =            (*((uint64_t *)buf + 1));
237#else
238	u_char const *p;
239	int i;
240
241	p = buf;
242	uuid->time_low = le32dec(p);
243	uuid->time_mid = le16dec(p + 4);
244	uuid->time_hi_and_version = le16dec(p + 6);
245	uuid->clock_seq_hi_and_reserved = p[8];
246	uuid->clock_seq_low = p[9];
247	for (i = 0; i < _UUID_NODE_LEN; i++)
248		uuid->node[i] = p[10 + i];
249#endif
250}
251
252void
253le_uuid_enc(void *buf, uuid_t const *uuid)
254{
255#ifdef __APPLE__
256	*((uint32_t *)buf + 0) = OSSwapInt32(*((uint32_t *)uuid + 0));
257	*((uint16_t *)buf + 2) = OSSwapInt16(*((uint16_t *)uuid + 2));
258	*((uint16_t *)buf + 3) = OSSwapInt16(*((uint16_t *)uuid + 3));
259	*((uint64_t *)buf + 1) =            (*((uint64_t *)uuid + 1));
260#else
261	u_char *p;
262	int i;
263
264	p = buf;
265	le32enc(p, uuid->time_low);
266	le16enc(p + 4, uuid->time_mid);
267	le16enc(p + 6, uuid->time_hi_and_version);
268	p[8] = uuid->clock_seq_hi_and_reserved;
269	p[9] = uuid->clock_seq_low;
270	for (i = 0; i < _UUID_NODE_LEN; i++)
271		p[10 + i] = uuid->node[i];
272#endif
273}
274
275int
276parse_uuid(const char *s, uuid_t *uuid)
277{
278#ifdef __APPLE__
279	int status;
280
281	status = uuid_parse(s, *uuid);
282	if (status == 0)
283		return (0);
284
285	switch (*s) {
286	case 'e':
287		if (strcmp(s, "efi") == 0) {
288			uuid_copy(*uuid, GPT_ENT_TYPE_EFI);
289			return (0);
290		}
291		break;
292	case 'h':
293		if (strcmp(s, "hfs") == 0) {
294			uuid_copy(*uuid, GPT_ENT_TYPE_APPLE_HFS);
295			return (0);
296		}
297		break;
298	case 'l':
299		if (strcmp(s, "linux") == 0) {
300			uuid_copy(*uuid, GPT_ENT_TYPE_MS_BASIC_DATA);
301			return (0);
302		}
303		break;
304	case 'w':
305		if (strcmp(s, "windows") == 0) {
306			uuid_copy(*uuid, GPT_ENT_TYPE_MS_BASIC_DATA);
307			return (0);
308		}
309		break;
310	}
311	return (EINVAL);
312#else
313	uint32_t status;
314
315	uuid_from_string(s, uuid, &status);
316	if (status == uuid_s_ok)
317		return (0);
318
319	switch (*s) {
320	case 'b':
321		if (strcmp(s, "boot") == 0) {
322			uuid_t boot = GPT_ENT_TYPE_FREEBSD_BOOT;
323			*uuid = boot;
324			return (0);
325		}
326		break;
327	case 'e':
328		if (strcmp(s, "efi") == 0) {
329			uuid_t efi = GPT_ENT_TYPE_EFI;
330			*uuid = efi;
331			return (0);
332		}
333		break;
334	case 'h':
335		if (strcmp(s, "hfs") == 0) {
336			uuid_t hfs = GPT_ENT_TYPE_APPLE_HFS;
337			*uuid = hfs;
338			return (0);
339		}
340		break;
341	case 'l':
342		if (strcmp(s, "linux") == 0) {
343			uuid_t lnx = GPT_ENT_TYPE_MS_BASIC_DATA;
344			*uuid = lnx;
345			return (0);
346		}
347		break;
348	case 's':
349		if (strcmp(s, "swap") == 0) {
350			uuid_t sw = GPT_ENT_TYPE_FREEBSD_SWAP;
351			*uuid = sw;
352			return (0);
353		}
354		break;
355	case 'u':
356		if (strcmp(s, "ufs") == 0) {
357			uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
358			*uuid = ufs;
359			return (0);
360		}
361		break;
362	case 'w':
363		if (strcmp(s, "windows") == 0) {
364			uuid_t win = GPT_ENT_TYPE_MS_BASIC_DATA;
365			*uuid = win;
366			return (0);
367		}
368		break;
369	case 'z':
370		if (strcmp(s, "zfs") == 0) {
371			uuid_t zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
372			*uuid = zfs;
373			return (0);
374		}
375		break;
376	}
377	return (EINVAL);
378#endif
379}
380
381void*
382gpt_read(int fd, off_t lba, size_t count)
383{
384	off_t ofs;
385	void *buf;
386
387	count *= secsz;
388	buf = malloc(count);
389	if (buf == NULL)
390		return (NULL);
391
392	ofs = lba * secsz;
393	if (lseek(fd, ofs, SEEK_SET) == ofs &&
394	    read(fd, buf, count) == (ssize_t)count)
395		return (buf);
396
397	free(buf);
398	return (NULL);
399}
400
401int
402gpt_write(int fd, map_t *map)
403{
404	off_t ofs;
405	size_t count;
406
407	count = map->map_size * secsz;
408	ofs = map->map_start * secsz;
409	if (lseek(fd, ofs, SEEK_SET) == ofs &&
410	    write(fd, map->map_data, count) == (ssize_t)count)
411		return (0);
412	return (-1);
413}
414
415static int
416gpt_mbr(int fd, off_t lba)
417{
418	struct mbr *mbr;
419	map_t *m, *p;
420	off_t size, start;
421	unsigned int i, pmbr;
422
423	mbr = gpt_read(fd, lba, 1);
424	if (mbr == NULL)
425		return (-1);
426
427	if (mbr->mbr_sig != htole16(MBR_SIG)) {
428		if (verbose)
429			warnx("%s: MBR not found at sector %llu", device_name,
430			    (long long)lba);
431		free(mbr);
432		return (0);
433	}
434
435	/*
436	 * Differentiate between a regular MBR and a PMBR. This is more
437	 * convenient in general. A PMBR is one with a single partition
438	 * of type 0xee.
439	 */
440	pmbr = 0;
441	for (i = 0; i < 4; i++) {
442		if (mbr->mbr_part[i].part_typ == 0)
443			continue;
444		if (mbr->mbr_part[i].part_typ == 0xee)
445			pmbr++;
446		else
447			break;
448	}
449	if (pmbr && i == 4 && lba == 0) {
450		if (pmbr != 1)
451			warnx("%s: Suspicious PMBR at sector %llu",
452			    device_name, (long long)lba);
453		else if (verbose > 1)
454			warnx("%s: PMBR at sector %llu", device_name,
455			    (long long)lba);
456		p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr);
457		return ((p == NULL) ? -1 : 0);
458	}
459	if (pmbr)
460		warnx("%s: Suspicious MBR at sector %llu", device_name,
461		    (long long)lba);
462	else if (verbose > 1)
463		warnx("%s: MBR at sector %llu", device_name, (long long)lba);
464
465	p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr);
466	if (p == NULL)
467		return (-1);
468	for (i = 0; i < 4; i++) {
469		if (mbr->mbr_part[i].part_typ == 0 ||
470		    mbr->mbr_part[i].part_typ == 0xee)
471			continue;
472		start = le16toh(mbr->mbr_part[i].part_start_hi);
473		start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo);
474		size = le16toh(mbr->mbr_part[i].part_size_hi);
475		size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo);
476		if (start == 0 && size == 0) {
477			warnx("%s: Malformed MBR at sector %llu", device_name,
478			    (long long)lba);
479			continue;
480		}
481		/* start is relative to the offset of the MBR itself. */
482		start += lba;
483		if (verbose > 2)
484			warnx("%s: MBR part: type=%d, start=%llu, size=%llu",
485			    device_name, mbr->mbr_part[i].part_typ,
486			    (long long)start, (long long)size);
487		if (mbr->mbr_part[i].part_typ != 15) {
488			m = map_add(start, size, MAP_TYPE_MBR_PART, p);
489			if (m == NULL)
490				return (-1);
491			m->map_index = i + 1;
492		} else {
493			if (gpt_mbr(fd, start) == -1)
494				return (-1);
495		}
496	}
497	return (0);
498}
499
500static int
501gpt_gpt(int fd, off_t lba)
502{
503	uuid_t type;
504	off_t size;
505	struct gpt_ent *ent;
506	struct gpt_hdr *hdr;
507	char *p, *s;
508	map_t *m;
509	size_t blocks, tblsz;
510	unsigned int i;
511	uint32_t crc;
512
513	hdr = gpt_read(fd, lba, 1);
514	if (hdr == NULL)
515		return (-1);
516
517	if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)))
518		goto fail_hdr;
519
520	crc = le32toh(hdr->hdr_crc_self);
521	hdr->hdr_crc_self = 0;
522	if (crc32(hdr, le32toh(hdr->hdr_size)) != crc) {
523		if (verbose)
524			warnx("%s: Bad CRC in GPT header at sector %llu",
525			    device_name, (long long)lba);
526		goto fail_hdr;
527	}
528
529	tblsz = le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz);
530	blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0);
531
532	/* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */
533	p = gpt_read(fd, le64toh(hdr->hdr_lba_table), blocks);
534	if (p == NULL)
535		return (-1);
536
537	if (crc32(p, tblsz) != le32toh(hdr->hdr_crc_table)) {
538		if (verbose)
539			warnx("%s: Bad CRC in GPT table at sector %llu",
540			    device_name,
541			    (long long)le64toh(hdr->hdr_lba_table));
542		goto fail_ent;
543	}
544
545	if (verbose > 1)
546		warnx("%s: %s GPT at sector %llu", device_name,
547		    (lba == 1) ? "Pri" : "Sec", (long long)lba);
548
549	m = map_add(lba, 1, (lba == 1)
550	    ? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr);
551	if (m == NULL)
552		return (-1);
553
554	m = map_add(le64toh(hdr->hdr_lba_table), blocks, (lba == 1)
555	    ? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p);
556	if (m == NULL)
557		return (-1);
558
559	if (lba != 1)
560		return (0);
561
562	for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
563		ent = (void*)(p + i * le32toh(hdr->hdr_entsz));
564		if (uuid_is_nil(&ent->ent_type, NULL))
565			continue;
566
567		size = le64toh(ent->ent_lba_end) - le64toh(ent->ent_lba_start) +
568		    1LL;
569		if (verbose > 2) {
570			le_uuid_dec(&ent->ent_type, &type);
571			uuid_to_string(&type, &s, NULL);
572			warnx(
573	"%s: GPT partition: type=%s, start=%llu, size=%llu", device_name, s,
574			    (long long)le64toh(ent->ent_lba_start),
575			    (long long)size);
576			free(s);
577		}
578		m = map_add(le64toh(ent->ent_lba_start), size,
579		    MAP_TYPE_GPT_PART, ent);
580		if (m == NULL)
581			return (-1);
582		m->map_index = i + 1;
583	}
584	return (0);
585
586 fail_ent:
587	free(p);
588
589 fail_hdr:
590	free(hdr);
591	return (0);
592}
593
594int
595gpt_open(const char *dev)
596{
597	struct stat sb;
598	int fd, mode;
599
600	mode = readonly ? O_RDONLY : O_RDWR|O_EXCL;
601
602	strlcpy(device_path, dev, sizeof(device_path));
603	device_name = device_path;
604
605	if ((fd = open(device_path, mode)) != -1)
606		goto found;
607
608	if (strncmp(dev, _PATH_DEV, strlen(_PATH_DEV)) == 0)
609		return (-1);
610
611	snprintf(device_path, sizeof(device_path), "%s%s", _PATH_DEV, dev);
612	device_name = device_path + strlen(_PATH_DEV);
613	if ((fd = open(device_path, mode)) != -1)
614		goto found;
615
616	return (-1);
617
618 found:
619	if (fstat(fd, &sb) == -1)
620		goto close;
621
622	if ((sb.st_mode & S_IFMT) != S_IFREG) {
623#ifdef __APPLE__
624		if (ioctl(fd, DKIOCGETBLOCKSIZE, &secsz) == -1 ||
625		    ioctl(fd, DKIOCGETBLOCKCOUNT, &mediasz) == -1)
626			goto close;
627		mediasz *= secsz;
628#else
629		if (ioctl(fd, DIOCGSECTORSIZE, &secsz) == -1 ||
630		    ioctl(fd, DIOCGMEDIASIZE, &mediasz) == -1)
631			goto close;
632#endif
633	} else {
634		secsz = 512;	/* Fixed size for files. */
635		if (sb.st_size % secsz) {
636			errno = EINVAL;
637			goto close;
638		}
639		mediasz = sb.st_size;
640	}
641
642	/*
643	 * We require an absolute minimum of 6 sectors. One for the MBR,
644	 * 2 for the GPT header, 2 for the GPT table and one to hold some
645	 * user data. Let's catch this extreme border case here so that
646	 * we don't have to worry about it later.
647	 */
648	if (mediasz / secsz < 6) {
649		errno = ENODEV;
650		goto close;
651	}
652
653	if (verbose)
654		warnx("%s: mediasize=%llu; sectorsize=%u; blocks=%llu",
655		    device_name, (long long)mediasz, secsz,
656		    (long long)(mediasz / secsz));
657
658	map_init(mediasz / secsz);
659
660	if (gpt_mbr(fd, 0LL) == -1)
661		goto close;
662
663#ifdef __APPLE__
664	if (gpt_gpt(fd, 1LL) == -1)
665		goto close;
666	if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
667		goto close;
668#else
669	/*
670	 * Don't look for a GPT unless we have a valid PMBR.
671	 */
672	if (map_find(MAP_TYPE_PMBR) != NULL) {
673		if (gpt_gpt(fd, 1LL) == -1)
674			goto close;
675		if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
676			goto close;
677	}
678#endif
679
680	return (fd);
681
682 close:
683	close(fd);
684	return (-1);
685}
686
687void
688gpt_close(int fd)
689{
690	/* XXX post processing? */
691	close(fd);
692}
693
694static struct {
695	int (*fptr)(int, char *[]);
696	const char *name;
697} cmdsw[] = {
698	{ cmd_add, "add" },
699#ifdef __APPLE__
700	{ NULL, "boot" },
701#else
702	{ cmd_boot, "boot" },
703#endif
704	{ cmd_create, "create" },
705	{ cmd_destroy, "destroy" },
706	{ NULL, "help" },
707	{ cmd_label, "label" },
708#ifdef __APPLE__
709	{ NULL, "migrate" },
710#else
711	{ cmd_migrate, "migrate" },
712#endif
713	{ cmd_recover, "recover" },
714	{ cmd_remove, "remove" },
715	{ NULL, "rename" },
716	{ cmd_show, "show" },
717	{ NULL, "verify" },
718	{ NULL, NULL }
719};
720
721static void
722usage(void)
723{
724
725	fprintf(stderr,
726	    "usage: %s [-rv] [-p nparts] command [options] device ...\n",
727	    getprogname());
728	exit(1);
729}
730
731static void
732prefix(const char *cmd)
733{
734	char *pfx;
735	const char *prg;
736
737	prg = getprogname();
738	pfx = malloc(strlen(prg) + strlen(cmd) + 2);
739	/* Don't bother failing. It's not important */
740	if (pfx == NULL)
741		return;
742
743	snprintf(pfx, strlen(prg) + strlen(cmd) + 2, "%s %s", prg, cmd);
744	setprogname(pfx);
745}
746
747int
748main(int argc, char *argv[])
749{
750	char *cmd, *p;
751	int ch, i;
752
753	/* Get the generic options */
754	while ((ch = getopt(argc, argv, "p:rv")) != -1) {
755		switch(ch) {
756		case 'p':
757			if (parts > 0)
758				usage();
759			parts = strtol(optarg, &p, 10);
760			if (*p != 0 || parts < 1)
761				usage();
762			break;
763		case 'r':
764			readonly = 1;
765			break;
766		case 'v':
767			verbose++;
768			break;
769		default:
770			usage();
771		}
772	}
773	if (!parts)
774		parts = 128;
775
776	if (argc == optind)
777		usage();
778
779	cmd = argv[optind++];
780	for (i = 0; cmdsw[i].name != NULL && strcmp(cmd, cmdsw[i].name); i++);
781
782	if (cmdsw[i].fptr == NULL)
783		errx(1, "unknown command: %s", cmd);
784
785	prefix(cmd);
786	return ((*cmdsw[i].fptr)(argc, argv));
787}
788