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disklabel64 utility - Allow pbase/pstop to be slice-relative-unaligned
[dragonfly.git] / sbin / disklabel64 / disklabel64.c
blobaa97189a132026a35f8a3aeb5ed14ec1a5e99308
1 /*
2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $DragonFly: src/sbin/disklabel64/disklabel64.c,v 1.8 2008/08/22 14:25:02 swildner Exp $
35 */
36 /*
37 * Copyright (c) 1987, 1993
38 * The Regents of the University of California. All rights reserved.
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Symmetric Computer Systems.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * @(#)disklabel.c 1.2 (Symmetric) 11/28/85
72 * @(#)disklabel.c 8.2 (Berkeley) 1/7/94
73 * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
74 * $DragonFly: src/sbin/disklabel64/disklabel64.c,v 1.8 2008/08/22 14:25:02 swildner Exp $
75 */
76
77 #include <sys/param.h>
78 #include <sys/file.h>
79 #include <sys/stat.h>
80 #include <sys/wait.h>
81 #define DKTYPENAMES
82 #include <sys/disklabel64.h>
83 #include <sys/diskslice.h>
84 #include <sys/diskmbr.h>
85 #include <sys/dtype.h>
86 #include <sys/sysctl.h>
87 #include <disktab.h>
88 #include <fstab.h>
89
90 #include <vfs/ufs/dinode.h>
91 #include <vfs/ufs/fs.h>
92
93 #include <unistd.h>
94 #include <string.h>
95 #include <stdio.h>
96 #include <stdlib.h>
97 #include <signal.h>
98 #include <stdarg.h>
99 #include <stddef.h>
100 #include <ctype.h>
101 #include <err.h>
102 #include <errno.h>
103 #include <disktab.h>
104 #include <uuid.h>
105 #include "pathnames.h"
106
107 extern uint32_t crc32(const void *buf, size_t size);
108
109 /*
110 * Disklabel: read and write disklabels.
111 * The label is usually placed on one of the first sectors of the disk.
112 * Many machines also place a bootstrap in the same area,
113 * in which case the label is embedded in the bootstrap.
114 * The bootstrap source must leave space at the proper offset
115 * for the label on such machines.
116 */
117
118 #define LABELSIZE ((sizeof(struct disklabel64) + 4095) & ~4095)
119 #define BOOTSIZE 32768
120
121 /* FIX! These are too low, but are traditional */
122 #define DEFAULT_NEWFS_BLOCK 8192U
123 #define DEFAULT_NEWFS_FRAG 1024U
124 #define DEFAULT_NEWFS_CPG 16U
125
126 #define BIG_NEWFS_BLOCK 16384U
127 #define BIG_NEWFS_FRAG 2048U
128 #define BIG_NEWFS_CPG 64U
129
130 void makelabel(const char *, const char *, struct disklabel64 *);
131 int writelabel(int, struct disklabel64 *);
132 void l_perror(const char *);
133 struct disklabel64 *readlabel(int);
134 struct disklabel64 *makebootarea(int);
135 void display(FILE *, const struct disklabel64 *);
136 int edit(struct disklabel64 *, int);
137 int editit(void);
138 char *skip(char *);
139 char *word(char *);
140 int getasciilabel(FILE *, struct disklabel64 *);
141 int getasciipartspec(char *, struct disklabel64 *, int, int, uint32_t);
142 int getasciipartuuid(char *, struct disklabel64 *, int, int, uint32_t);
143 int checklabel(struct disklabel64 *);
144 void Warning(const char *, ...) __printflike(1, 2);
145 void usage(void);
146 struct disklabel64 *getvirginlabel(void);
147
148 #define DEFEDITOR _PATH_VI
149 #define streq(a,b) (strcmp(a,b) == 0)
150
151 char *dkname;
152 char *specname;
153 char tmpfil[] = PATH_TMPFILE;
154
155 struct disklabel64 lab;
156
157 #define MAX_PART ('z')
158 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
159 char part_size_type[MAX_NUM_PARTS];
160 char part_offset_type[MAX_NUM_PARTS];
161 int part_set[MAX_NUM_PARTS];
162
163 int installboot; /* non-zero if we should install a boot program */
164 int boot1size;
165 int boot1lsize;
166 int boot2size;
167 char *boot1buf;
168 char *boot2buf;
169 char *boot1path;
170 char *boot2path;
171
172 enum {
173 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
174 } op = UNSPEC;
175
176 int rflag;
177 int Vflag;
178 int disable_write; /* set to disable writing to disk label */
179 u_int32_t slice_start_lba;
180
181 #ifdef DEBUG
182 int debug;
183 #define OPTIONS "BNRWb:denrs:Vw"
184 #else
185 #define OPTIONS "BNRWb:enrs:Vw"
186 #endif
187
188 int
189 main(int argc, char *argv[])
190 {
191 struct disklabel64 *lp;
192 FILE *t;
193 int ch, f = 0, flag, error = 0;
194 char *name = 0;
195
196 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
197 switch (ch) {
198 case 'B':
199 ++installboot;
200 break;
201 case 'b':
202 boot1path = optarg;
203 break;
204
205 case 's':
206 boot2path = optarg;
207 break;
208 case 'N':
209 if (op != UNSPEC)
210 usage();
211 op = NOWRITE;
212 break;
213 case 'n':
214 disable_write = 1;
215 break;
216 case 'R':
217 if (op != UNSPEC)
218 usage();
219 op = RESTORE;
220 break;
221 case 'W':
222 if (op != UNSPEC)
223 usage();
224 op = WRITEABLE;
225 break;
226 case 'e':
227 if (op != UNSPEC)
228 usage();
229 op = EDIT;
230 break;
231 case 'V':
232 ++Vflag;
233 break;
234 case 'r':
235 ++rflag;
236 break;
237 case 'w':
238 if (op != UNSPEC)
239 usage();
240 op = WRITE;
241 break;
242 #ifdef DEBUG
243 case 'd':
244 debug++;
245 break;
246 #endif
247 case '?':
248 default:
249 usage();
250 }
251 argc -= optind;
252 argv += optind;
253 if (installboot) {
254 rflag++;
255 if (op == UNSPEC)
256 op = WRITEBOOT;
257 } else {
258 if (op == UNSPEC)
259 op = READ;
260 boot1path = NULL;
261 boot2path = NULL;
262 }
263 if (argc < 1)
264 usage();
265
266 dkname = getdevpath(argv[0], 0);
267 specname = dkname;
268 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
269 if (f < 0)
270 err(4, "%s", specname);
271
272 switch(op) {
273
274 case UNSPEC:
275 break;
276
277 case EDIT:
278 if (argc != 1)
279 usage();
280 lp = readlabel(f);
281 error = edit(lp, f);
282 break;
283
284 case NOWRITE:
285 flag = 0;
286 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
287 err(4, "ioctl DIOCWLABEL");
288 break;
289
290 case READ:
291 if (argc != 1)
292 usage();
293 lp = readlabel(f);
294 display(stdout, lp);
295 error = checklabel(lp);
296 break;
297
298 case RESTORE:
299 if (installboot && argc == 3) {
300 makelabel(argv[2], 0, &lab);
301 argc--;
302
303 /*
304 * We only called makelabel() for its side effect
305 * of setting the bootstrap file names. Discard
306 * all changes to `lab' so that all values in the
307 * final label come from the ASCII label.
308 */
309 bzero((char *)&lab, sizeof(lab));
310 }
311 if (argc != 2)
312 usage();
313 if (!(t = fopen(argv[1], "r")))
314 err(4, "%s", argv[1]);
315 if (!getasciilabel(t, &lab))
316 exit(1);
317 lp = makebootarea(f);
318 bcopy(&lab.d_magic, &lp->d_magic,
319 sizeof(lab) - offsetof(struct disklabel64, d_magic));
320 error = writelabel(f, lp);
321 break;
322
323 case WRITE:
324 if (argc == 3) {
325 name = argv[2];
326 argc--;
327 }
328 if (argc != 2)
329 usage();
330 makelabel(argv[1], name, &lab);
331 lp = makebootarea(f);
332 bcopy(&lab.d_magic, &lp->d_magic,
333 sizeof(lab) - offsetof(struct disklabel64, d_magic));
334 if (checklabel(lp) == 0)
335 error = writelabel(f, lp);
336 break;
337
338 case WRITEABLE:
339 flag = 1;
340 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
341 err(4, "ioctl DIOCWLABEL");
342 break;
343
344 case WRITEBOOT:
345 {
346 struct disklabel64 tlab;
347
348 lp = readlabel(f);
349 tlab = *lp;
350 if (argc == 2)
351 makelabel(argv[1], 0, &lab);
352 lp = makebootarea(f);
353 bcopy(&tlab.d_magic, &lp->d_magic,
354 sizeof(tlab) - offsetof(struct disklabel64, d_magic));
355 if (checklabel(lp) == 0)
356 error = writelabel(f, lp);
357 break;
358 }
359 }
360 exit(error);
361 }
362
363 /*
364 * Construct a prototype disklabel from /etc/disktab. As a side
365 * effect, set the names of the primary and secondary boot files
366 * if specified.
367 */
368 void
369 makelabel(const char *type, const char *name, struct disklabel64 *lp)
370 {
371 struct disklabel64 *dp;
372
373 if (strcmp(type, "auto") == 0)
374 dp = getvirginlabel();
375 else
376 dp = NULL;
377 if (dp == NULL)
378 errx(1, "%s: unknown disk type", type);
379 *lp = *dp;
380
381 /*
382 * NOTE: boot control files may no longer be specified in disktab.
383 */
384 if (name)
385 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
386 }
387
388 int
389 writelabel(int f, struct disklabel64 *lp)
390 {
391 struct disklabel64 *blp;
392 int flag;
393 int r;
394 size_t lpsize;
395 size_t lpcrcsize;
396
397 lpsize = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
398 lpcrcsize = lpsize - offsetof(struct disklabel64, d_magic);
399
400 if (disable_write) {
401 Warning("write to disk label suppressed - label was as follows:");
402 display(stdout, lp);
403 return (0);
404 } else {
405 lp->d_magic = DISKMAGIC64;
406 lp->d_crc = 0;
407 lp->d_crc = crc32(&lp->d_magic, lpcrcsize);
408 if (rflag) {
409 /*
410 * Make sure the boot area is not too large
411 */
412 if (boot2buf) {
413 int lpbsize = (int)(lp->d_pbase - lp->d_bbase);
414 if (lp->d_pbase == 0) {
415 errx(1, "no space was set aside in "
416 "the disklabel for boot2!");
417 }
418 if (boot2size > lpbsize) {
419 errx(1, "label did not reserve enough "
420 "space for boot! %d/%d",
421 boot2size, lpbsize);
422 }
423 }
424
425 /*
426 * First set the kernel disk label,
427 * then write a label to the raw disk.
428 * If the SDINFO ioctl fails because it is
429 * unimplemented, keep going; otherwise, the kernel
430 * consistency checks may prevent us from changing
431 * the current (in-core) label.
432 */
433 if (ioctl(f, DIOCSDINFO64, lp) < 0 &&
434 errno != ENODEV && errno != ENOTTY) {
435 l_perror("ioctl DIOCSDINFO");
436 return (1);
437 }
438 lseek(f, (off_t)0, SEEK_SET);
439
440 /*
441 * The disklabel embeds areas which we may not
442 * have wanted to change. Merge those areas in
443 * from disk.
444 */
445 blp = makebootarea(f);
446 if (blp != lp) {
447 bcopy(&lp->d_magic, &blp->d_magic,
448 sizeof(*lp) -
449 offsetof(struct disklabel64, d_magic));
450 }
451
452 /*
453 * write enable label sector before write
454 * (if necessary), disable after writing.
455 */
456 flag = 1;
457 if (ioctl(f, DIOCWLABEL, &flag) < 0)
458 warn("ioctl DIOCWLABEL");
459
460 r = write(f, boot1buf, boot1lsize);
461 if (r != (ssize_t)boot1lsize) {
462 warn("write");
463 return (1);
464 }
465 /*
466 * Output the remainder of the disklabel
467 */
468 if (boot2buf) {
469 lseek(f, lp->d_bbase, 0);
470 r = write(f, boot2buf, boot2size);
471 if (r != boot2size) {
472 warn("write");
473 return(1);
474 }
475 }
476 flag = 0;
477 ioctl(f, DIOCWLABEL, &flag);
478 } else if (ioctl(f, DIOCWDINFO64, lp) < 0) {
479 l_perror("ioctl DIOCWDINFO64");
480 return (1);
481 }
482 }
483 return (0);
484 }
485
486 void
487 l_perror(const char *s)
488 {
489 switch (errno) {
490
491 case ESRCH:
492 warnx("%s: no disk label on disk;", s);
493 fprintf(stderr, "add \"-r\" to install initial label\n");
494 break;
495
496 case EINVAL:
497 warnx("%s: label magic number or checksum is wrong!", s);
498 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
499 break;
500
501 case EBUSY:
502 warnx("%s: open partition would move or shrink", s);
503 break;
504
505 case ENOATTR:
506 warnx("%s: the disk already has a label of a different type,\n"
507 "probably a 32 bit disklabel. It must be cleaned out "
508 "first.\n", s);
509 break;
510
511 default:
512 warn(NULL);
513 break;
514 }
515 }
516
517 /*
518 * Fetch disklabel for disk.
519 * Use ioctl to get label unless -r flag is given.
520 */
521 struct disklabel64 *
522 readlabel(int f)
523 {
524 struct disklabel64 *lp;
525 u_int32_t savecrc;
526 size_t lpcrcsize;
527
528 if (rflag) {
529 /*
530 * Allocate space for the label. The boot1 code, if any,
531 * is embedded in the label. The label overlaps the boot1
532 * code.
533 */
534 lp = makebootarea(f);
535 lpcrcsize = offsetof(struct disklabel64,
536 d_partitions[lp->d_npartitions]) -
537 offsetof(struct disklabel64, d_magic);
538 savecrc = lp->d_crc;
539 lp->d_crc = 0;
540 if (lp->d_magic != DISKMAGIC64)
541 errx(1, "bad pack magic number");
542 if (lp->d_npartitions > MAXPARTITIONS64 ||
543 savecrc != crc32(&lp->d_magic, lpcrcsize)
544 ) {
545 errx(1, "corrupted disklabel64");
546 }
547 lp->d_crc = savecrc;
548 } else {
549 /*
550 * Just use a static structure to hold the label. Note
551 * that DIOCSDINFO64 does not overwrite the boot1 area
552 * even though it is part of the disklabel64 structure.
553 */
554 lp = &lab;
555 if (Vflag) {
556 if (ioctl(f, DIOCGDVIRGIN64, lp) < 0) {
557 l_perror("ioctl DIOCGDVIRGIN64");
558 exit(4);
559 }
560 } else {
561 if (ioctl(f, DIOCGDINFO64, lp) < 0) {
562 l_perror("ioctl DIOCGDINFO64");
563 exit(4);
564 }
565 }
566 }
567 return (lp);
568 }
569
570 /*
571 * Construct a boot area for boot1 and boot2 and return the location of
572 * the label within the area. The caller will overwrite the label so
573 * we don't actually have to read it.
574 */
575 struct disklabel64 *
576 makebootarea(int f)
577 {
578 struct disklabel64 *lp;
579 struct partinfo info;
580 u_int32_t secsize;
581 struct stat st;
582 int fd;
583 int r;
584
585 if (ioctl(f, DIOCGPART, &info) == 0)
586 secsize = info.media_blksize;
587 else
588 secsize = 512;
589
590 if (boot1buf == NULL) {
591 size_t rsize;
592
593 rsize = (sizeof(struct disklabel64) + secsize - 1) &
594 ~(secsize - 1);
595 boot1size = offsetof(struct disklabel64, d_magic);
596 boot1lsize = rsize;
597 boot1buf = malloc(rsize);
598 bzero(boot1buf, rsize);
599 r = read(f, boot1buf, rsize);
600 if (r != (int)rsize)
601 err(4, "%s", specname);
602 }
603 lp = (void *)boot1buf;
604
605 if (installboot == 0)
606 return(lp);
607
608 if (boot2buf == NULL) {
609 boot2size = 32768;
610 boot2buf = malloc(boot2size);
611 bzero(boot2buf, boot2size);
612 }
613
614 /*
615 * If installing the boot code, read it into the appropriate portions
616 * of the buffer(s)
617 */
618 if (boot1path == NULL)
619 asprintf(&boot1path, "%s/boot1_64", _PATH_BOOTDIR);
620 if (boot2path == NULL)
621 asprintf(&boot2path, "%s/boot2_64", _PATH_BOOTDIR);
622
623 if ((fd = open(boot1path, O_RDONLY)) < 0)
624 err(4, "%s", boot1path);
625 if (fstat(fd, &st) < 0)
626 err(4, "%s", boot1path);
627 if (st.st_size > boot1size)
628 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
629 if (read(fd, boot1buf, boot1size) != boot1size)
630 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
631 close(fd);
632
633 if ((fd = open(boot2path, O_RDONLY)) < 0)
634 err(4, "%s", boot2path);
635 if (fstat(fd, &st) < 0)
636 err(4, "%s", boot2path);
637 if (st.st_size > boot2size)
638 err(4, "%s must be <= %d bytes!", boot2path, boot2size);
639 if ((r = read(fd, boot2buf, boot2size)) < 1)
640 err(4, "%s is empty!", boot2path);
641 boot2size = (r + secsize - 1) & ~(secsize - 1);
642 close(fd);
643
644 /*
645 * XXX dangerously dedicated support goes here XXX
646 */
647 return (lp);
648 }
649
650 void
651 display(FILE *f, const struct disklabel64 *lp)
652 {
653 const struct partition64 *pp;
654 char *str;
655 unsigned int part;
656 int didany;
657 uint32_t blksize;
658
659 /*
660 * Use a human readable block size if possible. This is for
661 * display and editing purposes only.
662 */
663 if (lp->d_align > 1024)
664 blksize = 1024;
665 else
666 blksize = lp->d_align;
667
668 fprintf(f, "# %s:\n", specname);
669 fprintf(f, "#\n");
670 fprintf(f, "# Informational fields calculated from the above\n");
671 fprintf(f, "# All byte equivalent offsets must be aligned\n");
672 fprintf(f, "#\n");
673 fprintf(f, "# boot space: %10ju bytes\n",
674 (intmax_t)(lp->d_pbase - lp->d_bbase));
675 fprintf(f, "# data space: %10ju blocks\t# %6.2f MB (%ju bytes)\n",
676 (intmax_t)(lp->d_pstop - lp->d_pbase) / blksize,
677 (double)(lp->d_pstop - lp->d_pbase) / 1024.0 / 1024.0,
678 (intmax_t)(lp->d_pstop - lp->d_pbase));
679 fprintf(f, "#\n");
680 fprintf(f, "# NOTE: If the partition data base looks odd it may be\n");
681 fprintf(f, "# physically aligned instead of slice-aligned\n");
682 fprintf(f, "#\n");
683
684 uuid_to_string(&lp->d_stor_uuid, &str, NULL);
685 fprintf(f, "diskid: %s\n", str ? str : "<unknown>");
686 free(str);
687
688 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
689 lp->d_packname);
690 fprintf(f, "boot2 data base: 0x%012jx\n", (intmax_t)lp->d_bbase);
691 fprintf(f, "partitions data base: 0x%012jx\n", (intmax_t)lp->d_pbase);
692 fprintf(f, "partitions data stop: 0x%012jx\n", (intmax_t)lp->d_pstop);
693 fprintf(f, "backup label: 0x%012jx\n", (intmax_t)lp->d_abase);
694 fprintf(f, "total size: 0x%012jx\t# %6.2f MB\n",
695 (intmax_t)lp->d_total_size,
696 (double)lp->d_total_size / 1024.0 / 1024.0);
697 fprintf(f, "alignment: %u\n", lp->d_align);
698 fprintf(f, "display block size: %u\t# for partition display only\n",
699 blksize);
700
701 fprintf(f, "\n");
702 fprintf(f, "%u partitions:\n", lp->d_npartitions);
703 fprintf(f, "# size offset fstype fsuuid\n");
704 didany = 0;
705 for (part = 0; part < lp->d_npartitions; part++) {
706 pp = &lp->d_partitions[part];
707 const u_long onemeg = 1024 * 1024;
708
709 if (pp->p_bsize == 0)
710 continue;
711 didany = 1;
712 fprintf(f, " %c: ", 'a' + part);
713
714 if (pp->p_bsize % lp->d_align)
715 fprintf(f, "%10s ", "ILLEGAL");
716 else
717 fprintf(f, "%10ju ", (intmax_t)pp->p_bsize / blksize);
718
719 if ((pp->p_boffset - lp->d_pbase) % lp->d_align)
720 fprintf(f, "%10s ", "ILLEGAL");
721 else
722 fprintf(f, "%10ju ",
723 (intmax_t)(pp->p_boffset - lp->d_pbase) / blksize);
724
725 if (pp->p_fstype < FSMAXTYPES)
726 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
727 else
728 fprintf(f, "%8d", pp->p_fstype);
729 fprintf(f, "\t# %11.3fMB", (double)pp->p_bsize / onemeg);
730 fprintf(f, "\n");
731 }
732 for (part = 0; part < lp->d_npartitions; part++) {
733 pp = &lp->d_partitions[part];
734
735 if (pp->p_bsize == 0)
736 continue;
737
738 if (uuid_is_nil(&lp->d_stor_uuid, NULL) == 0) {
739 fprintf(f, " %c-stor_uuid: ", 'a' + part);
740 str = NULL;
741 uuid_to_string(&pp->p_stor_uuid, &str, NULL);
742 if (str) {
743 fprintf(f, "%s", str);
744 free(str);
745 }
746 fprintf(f, "\n");
747 }
748 }
749 if (didany == 0) {
750 fprintf(f, "# EXAMPLE\n");
751 fprintf(f, "#a: 4g 0 4.2BSD\n");
752 fprintf(f, "#a: * * 4.2BSD\n");
753
754 }
755 fflush(f);
756 }
757
758 int
759 edit(struct disklabel64 *lp, int f)
760 {
761 int c, fd;
762 struct disklabel64 label;
763 FILE *fp;
764
765 if ((fd = mkstemp(tmpfil)) == -1 ||
766 (fp = fdopen(fd, "w")) == NULL) {
767 warnx("can't create %s", tmpfil);
768 return (1);
769 }
770 display(fp, lp);
771 fclose(fp);
772 for (;;) {
773 if (!editit())
774 break;
775 fp = fopen(tmpfil, "r");
776 if (fp == NULL) {
777 warnx("can't reopen %s for reading", tmpfil);
778 break;
779 }
780 bzero((char *)&label, sizeof(label));
781 if (getasciilabel(fp, &label)) {
782 *lp = label;
783 if (writelabel(f, lp) == 0) {
784 fclose(fp);
785 unlink(tmpfil);
786 return (0);
787 }
788 }
789 fclose(fp);
790 printf("re-edit the label? [y]: "); fflush(stdout);
791 c = getchar();
792 if (c != EOF && c != (int)'\n')
793 while (getchar() != (int)'\n')
794 ;
795 if (c == (int)'n')
796 break;
797 }
798 unlink(tmpfil);
799 return (1);
800 }
801
802 int
803 editit(void)
804 {
805 int pid, xpid;
806 int status, omask;
807 const char *ed;
808
809 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
810 while ((pid = fork()) < 0) {
811 if (errno == EPROCLIM) {
812 warnx("you have too many processes");
813 return(0);
814 }
815 if (errno != EAGAIN) {
816 warn("fork");
817 return(0);
818 }
819 sleep(1);
820 }
821 if (pid == 0) {
822 sigsetmask(omask);
823 setgid(getgid());
824 setuid(getuid());
825 if ((ed = getenv("EDITOR")) == NULL)
826 ed = DEFEDITOR;
827 execlp(ed, ed, tmpfil, NULL);
828 err(1, "%s", ed);
829 }
830 while ((xpid = wait(&status)) >= 0)
831 if (xpid == pid)
832 break;
833 sigsetmask(omask);
834 return(!status);
835 }
836
837 char *
838 skip(char *cp)
839 {
840
841 while (*cp != '\0' && isspace(*cp))
842 cp++;
843 if (*cp == '\0' || *cp == '#')
844 return (NULL);
845 return (cp);
846 }
847
848 char *
849 word(char *cp)
850 {
851 char c;
852
853 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
854 cp++;
855 if ((c = *cp) != '\0') {
856 *cp++ = '\0';
857 if (c != '#')
858 return (skip(cp));
859 }
860 return (NULL);
861 }
862
863 /*
864 * Read an ascii label in from fd f,
865 * in the same format as that put out by display(),
866 * and fill in lp.
867 */
868 int
869 getasciilabel(FILE *f, struct disklabel64 *lp)
870 {
871 char *cp;
872 u_int part;
873 char *tp, line[BUFSIZ];
874 u_long v;
875 uint32_t blksize = 0;
876 uint64_t vv;
877 int lineno = 0, errors = 0;
878 char empty[] = "";
879
880 bzero(&part_set, sizeof(part_set));
881 bzero(&part_size_type, sizeof(part_size_type));
882 bzero(&part_offset_type, sizeof(part_offset_type));
883 while (fgets(line, sizeof(line) - 1, f)) {
884 lineno++;
885 if ((cp = strchr(line,'\n')) != 0)
886 *cp = '\0';
887 cp = skip(line);
888 if (cp == NULL)
889 continue;
890 tp = strchr(cp, ':');
891 if (tp == NULL) {
892 fprintf(stderr, "line %d: syntax error\n", lineno);
893 errors++;
894 continue;
895 }
896 *tp++ = '\0', tp = skip(tp);
897 if (sscanf(cp, "%lu partitions", &v) == 1) {
898 if (v == 0 || v > MAXPARTITIONS64) {
899 fprintf(stderr,
900 "line %d: bad # of partitions\n", lineno);
901 lp->d_npartitions = MAXPARTITIONS64;
902 errors++;
903 } else
904 lp->d_npartitions = v;
905 continue;
906 }
907 if (tp == NULL)
908 tp = empty;
909
910 if (streq(cp, "diskid")) {
911 uint32_t status = 0;
912 uuid_from_string(tp, &lp->d_stor_uuid, &status);
913 if (status != uuid_s_ok) {
914 fprintf(stderr,
915 "line %d: %s: illegal UUID\n",
916 lineno, tp);
917 errors++;
918 }
919 continue;
920 }
921 if (streq(cp, "label")) {
922 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
923 continue;
924 }
925
926 if (streq(cp, "alignment")) {
927 v = strtoul(tp, NULL, 0);
928 if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
929 fprintf(stderr,
930 "line %d: %s: bad alignment\n",
931 lineno, tp);
932 errors++;
933 } else {
934 lp->d_align = v;
935 }
936 continue;
937 }
938 if (streq(cp, "total size")) {
939 vv = strtoull(tp, NULL, 0);
940 if (vv == 0 || vv == (uint64_t)-1) {
941 fprintf(stderr, "line %d: %s: bad %s\n",
942 lineno, tp, cp);
943 errors++;
944 } else {
945 lp->d_total_size = vv;
946 }
947 continue;
948 }
949 if (streq(cp, "boot2 data base")) {
950 vv = strtoull(tp, NULL, 0);
951 if (vv == 0 || vv == (uint64_t)-1) {
952 fprintf(stderr, "line %d: %s: bad %s\n",
953 lineno, tp, cp);
954 errors++;
955 } else {
956 lp->d_bbase = vv;
957 }
958 continue;
959 }
960 if (streq(cp, "partitions data base")) {
961 vv = strtoull(tp, NULL, 0);
962 if (vv == 0 || vv == (uint64_t)-1) {
963 fprintf(stderr, "line %d: %s: bad %s\n",
964 lineno, tp, cp);
965 errors++;
966 } else {
967 lp->d_pbase = vv;
968 }
969 continue;
970 }
971 if (streq(cp, "partitions data stop")) {
972 vv = strtoull(tp, NULL, 0);
973 if (vv == 0 || vv == (uint64_t)-1) {
974 fprintf(stderr, "line %d: %s: bad %s\n",
975 lineno, tp, cp);
976 errors++;
977 } else {
978 lp->d_pstop = vv;
979 }
980 continue;
981 }
982 if (streq(cp, "backup label")) {
983 vv = strtoull(tp, NULL, 0);
984 if (vv == 0 || vv == (uint64_t)-1) {
985 fprintf(stderr, "line %d: %s: bad %s\n",
986 lineno, tp, cp);
987 errors++;
988 } else {
989 lp->d_abase = vv;
990 }
991 continue;
992 }
993 if (streq(cp, "display block size")) {
994 v = strtoul(tp, NULL, 0);
995 if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
996 fprintf(stderr,
997 "line %d: %s: bad alignment\n",
998 lineno, tp);
999 errors++;
1000 } else {
1001 blksize = v;
1002 }
1003 continue;
1004 }
1005
1006 /* the ':' was removed above */
1007
1008 /*
1009 * Handle main partition data, e.g. a:, b:, etc.
1010 */
1011 if (*cp < 'a' || *cp > MAX_PART) {
1012 fprintf(stderr,
1013 "line %d: %s: Unknown disklabel field\n", lineno,
1014 cp);
1015 errors++;
1016 continue;
1017 }
1018
1019 /* Process a partition specification line. */
1020 part = *cp - 'a';
1021 if (part >= lp->d_npartitions) {
1022 fprintf(stderr,
1023 "line %d: partition name out of range a-%c: %s\n",
1024 lineno, 'a' + lp->d_npartitions - 1, cp);
1025 errors++;
1026 continue;
1027 }
1028
1029 if (blksize == 0) {
1030 fprintf(stderr, "block size to use for partition "
1031 "display was not specified!\n");
1032 errors++;
1033 continue;
1034 }
1035
1036 if (strcmp(cp + 1, "-stor_uuid") == 0) {
1037 if (getasciipartuuid(tp, lp, part, lineno, blksize)) {
1038 errors++;
1039 break;
1040 }
1041 continue;
1042 } else if (cp[1] == 0) {
1043 part_set[part] = 1;
1044 if (getasciipartspec(tp, lp, part, lineno, blksize)) {
1045 errors++;
1046 break;
1047 }
1048 continue;
1049 }
1050 fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1051 lineno, cp);
1052 errors++;
1053 continue;
1054 }
1055 errors += checklabel(lp);
1056 return (errors == 0);
1057 }
1058
1059 static
1060 int
1061 parse_field_val(char **tp, char **cp, u_int64_t *vv, int lineno)
1062 {
1063 char *tmp;
1064
1065 if (*tp == NULL || **tp == 0) {
1066 fprintf(stderr, "line %d: too few numeric fields\n", lineno);
1067 return(-1);
1068 }
1069 *cp = *tp;
1070 *tp = word(*cp);
1071 *vv = strtoull(*cp, &tmp, 0);
1072 if (*vv == ULLONG_MAX) {
1073 fprintf(stderr, "line %d: illegal number\n", lineno);
1074 return(-1);
1075 }
1076 if (tmp)
1077 return(*tmp);
1078 else
1079 return(0);
1080 }
1081
1082 /*
1083 * Read a partition line into partition `part' in the specified disklabel.
1084 * Return 0 on success, 1 on failure.
1085 */
1086 int
1087 getasciipartspec(char *tp, struct disklabel64 *lp, int part,
1088 int lineno, uint32_t blksize)
1089 {
1090 struct partition64 *pp;
1091 char *cp;
1092 const char **cpp;
1093 int r;
1094 u_long v;
1095 uint64_t vv;
1096 uint64_t mpx;
1097
1098 pp = &lp->d_partitions[part];
1099 cp = NULL;
1100
1101 /*
1102 * size
1103 */
1104 r = parse_field_val(&tp, &cp, &vv, lineno);
1105 if (r < 0)
1106 return (1);
1107
1108 mpx = 1;
1109 switch(r) {
1110 case 0:
1111 mpx = blksize;
1112 break;
1113 case '%':
1114 /* mpx = 1; */
1115 break;
1116 case '*':
1117 mpx = 0;
1118 break;
1119 case 'g':
1120 case 'G':
1121 mpx *= 1024ULL;
1122 /* fall through */
1123 case 'm':
1124 case 'M':
1125 mpx *= 1024ULL;
1126 /* fall through */
1127 case 'k':
1128 case 'K':
1129 mpx *= 1024ULL;
1130 r = 0; /* eat the suffix */
1131 break;
1132 default:
1133 Warning("unknown size specifier '%c' (*/%%/K/M/G are valid)",
1134 r);
1135 return(1);
1136 }
1137
1138 part_size_type[part] = r;
1139 if (vv == 0 && r != '*') {
1140 fprintf(stderr,
1141 "line %d: %s: bad partition size (0)\n", lineno, cp);
1142 return (1);
1143 }
1144 pp->p_bsize = vv * mpx;
1145
1146 /*
1147 * offset
1148 */
1149 r = parse_field_val(&tp, &cp, &vv, lineno);
1150 if (r < 0)
1151 return (1);
1152 part_offset_type[part] = r;
1153 switch(r) {
1154 case '*':
1155 pp->p_boffset = 0;
1156 break;
1157 case 0:
1158 pp->p_boffset = vv * blksize + lp->d_pbase;
1159 break;
1160 default:
1161 fprintf(stderr,
1162 "line %d: %s: bad suffix on partition offset (%c)\n",
1163 lineno, cp, r);
1164 return (1);
1165 }
1166
1167 /*
1168 * fstype
1169 */
1170 cp = tp;
1171 tp = word(cp);
1172 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
1173 if (*cpp && strcasecmp(*cpp, cp) == 0)
1174 break;
1175 }
1176 if (*cpp != NULL) {
1177 pp->p_fstype = cpp - fstypenames;
1178 } else {
1179 if (isdigit(*cp))
1180 v = strtoul(cp, NULL, 0);
1181 else
1182 v = FSMAXTYPES;
1183 if (v >= FSMAXTYPES) {
1184 fprintf(stderr,
1185 "line %d: Warning, unknown filesystem type %s\n",
1186 lineno, cp);
1187 v = FS_UNUSED;
1188 }
1189 pp->p_fstype = v;
1190 }
1191
1192 cp = tp;
1193 if (tp) {
1194 fprintf(stderr, "line %d: Warning, extra data on line\n",
1195 lineno);
1196 }
1197 return(0);
1198 }
1199
1200 int
1201 getasciipartuuid(char *tp, struct disklabel64 *lp, int part,
1202 int lineno, uint32_t blksize __unused)
1203 {
1204 struct partition64 *pp;
1205 uint32_t status;
1206 char *cp;
1207
1208 pp = &lp->d_partitions[part];
1209
1210 cp = tp;
1211 tp = word(cp);
1212 uuid_from_string(cp, &pp->p_stor_uuid, &status);
1213 if (status != uuid_s_ok) {
1214 fprintf(stderr, "line %d: Illegal storage uuid specification\n",
1215 lineno);
1216 return(1);
1217 }
1218 return(0);
1219 }
1220
1221 /*
1222 * Check disklabel for errors and fill in
1223 * derived fields according to supplied values.
1224 */
1225 int
1226 checklabel(struct disklabel64 *lp)
1227 {
1228 struct partition64 *pp;
1229 int errors = 0;
1230 char part;
1231 u_int64_t total_size;
1232 u_int64_t current_offset;
1233 u_long total_percent;
1234 int seen_default_offset;
1235 int hog_part;
1236 int i, j;
1237 struct partition64 *pp2;
1238 u_int64_t off;
1239
1240 if (lp->d_align < 512 ||
1241 (lp->d_align ^ (lp->d_align - 1)) != lp->d_align * 2 - 1) {
1242 Warning("Illegal alignment specified: %u\n", lp->d_align);
1243 return (1);
1244 }
1245 if (lp->d_npartitions > MAXPARTITIONS64) {
1246 Warning("number of partitions (%u) > MAXPARTITIONS (%d)",
1247 lp->d_npartitions, MAXPARTITIONS64);
1248 return (1);
1249 }
1250 off = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
1251 off = (off + lp->d_align - 1) & ~(int64_t)(lp->d_align - 1);
1252
1253 if (lp->d_bbase < off || lp->d_bbase % lp->d_align) {
1254 Warning("illegal boot2 data base ");
1255 return (1);
1256 }
1257
1258 /*
1259 * pbase can be unaligned slice-relative but will be
1260 * aligned physically.
1261 */
1262 if (lp->d_pbase < lp->d_bbase) {
1263 Warning("illegal partition data base");
1264 return (1);
1265 }
1266 if (lp->d_pstop < lp->d_pbase) {
1267 Warning("illegal partition data stop");
1268 return (1);
1269 }
1270 if (lp->d_pstop > lp->d_total_size) {
1271 printf("%012jx\n%012jx\n",
1272 (intmax_t)lp->d_pstop, (intmax_t)lp->d_total_size);
1273 Warning("disklabel control info is beyond the total size");
1274 return (1);
1275 }
1276 if (lp->d_abase &&
1277 (lp->d_abase < lp->d_pstop ||
1278 lp->d_abase > lp->d_total_size - off)) {
1279 Warning("illegal backup label location");
1280 return (1);
1281 }
1282
1283 /* first allocate space to the partitions, then offsets */
1284 total_size = 0; /* in bytes */
1285 total_percent = 0; /* in percent */
1286 hog_part = -1;
1287 /* find all fixed partitions */
1288 for (i = 0; i < (int)lp->d_npartitions; i++) {
1289 pp = &lp->d_partitions[i];
1290 if (part_set[i]) {
1291 if (part_size_type[i] == '*') {
1292 if (part_offset_type[i] != '*') {
1293 if (total_size < pp->p_boffset)
1294 total_size = pp->p_boffset;
1295 }
1296 if (hog_part != -1) {
1297 Warning("Too many '*' partitions (%c and %c)",
1298 hog_part + 'a',i + 'a');
1299 } else {
1300 hog_part = i;
1301 }
1302 } else {
1303 off_t size;
1304
1305 size = pp->p_bsize;
1306 if (part_size_type[i] == '%') {
1307 /*
1308 * don't count %'s yet
1309 */
1310 total_percent += size;
1311 } else {
1312 /*
1313 * Value has already been converted
1314 * to bytes.
1315 */
1316 if (size % lp->d_align != 0) {
1317 Warning("partition %c's size is not properly aligned",
1318 i + 'a');
1319 }
1320 total_size += size;
1321 }
1322 }
1323 }
1324 }
1325 /* handle % partitions - note %'s don't need to add up to 100! */
1326 if (total_percent != 0) {
1327 int64_t free_space;
1328 int64_t space_left;
1329
1330 free_space = (int64_t)(lp->d_pstop - lp->d_pbase - total_size);
1331 free_space &= ~(u_int64_t)(lp->d_align - 1);
1332
1333 space_left = free_space;
1334 if (total_percent > 100) {
1335 fprintf(stderr,"total percentage %lu is greater than 100\n",
1336 total_percent);
1337 errors++;
1338 }
1339
1340 if (free_space > 0) {
1341 for (i = 0; i < (int)lp->d_npartitions; i++) {
1342 pp = &lp->d_partitions[i];
1343 if (part_set[i] && part_size_type[i] == '%') {
1344 /* careful of overflows! and integer roundoff */
1345 pp->p_bsize = ((double)pp->p_bsize/100) * free_space;
1346 pp->p_bsize = (pp->p_bsize + lp->d_align - 1) & ~(u_int64_t)(lp->d_align - 1);
1347 if ((int64_t)pp->p_bsize > space_left)
1348 pp->p_bsize = (u_int64_t)space_left;
1349 total_size += pp->p_bsize;
1350 space_left -= pp->p_bsize;
1351 }
1352 }
1353 } else {
1354 fprintf(stderr, "%jd bytes available to give to "
1355 "'*' and '%%' partitions\n",
1356 (intmax_t)free_space);
1357 errors++;
1358 /* fix? set all % partitions to size 0? */
1359 }
1360 }
1361 /* give anything remaining to the hog partition */
1362 if (hog_part != -1) {
1363 off = lp->d_pstop - lp->d_pbase - total_size;
1364 off &= ~(u_int64_t)(lp->d_align - 1);
1365 lp->d_partitions[hog_part].p_bsize = off;
1366 total_size = lp->d_pstop - lp->d_pbase;
1367 }
1368
1369 /* Now set the offsets for each partition */
1370 current_offset = lp->d_pbase;
1371 seen_default_offset = 0;
1372 for (i = 0; i < (int)lp->d_npartitions; i++) {
1373 part = 'a' + i;
1374 pp = &lp->d_partitions[i];
1375 if (pp->p_bsize == 0)
1376 continue;
1377 if (part_set[i]) {
1378 if (part_offset_type[i] == '*') {
1379 pp->p_boffset = current_offset;
1380 seen_default_offset = 1;
1381 } else {
1382 /* allow them to be out of order for old-style tables */
1383 if (pp->p_boffset < current_offset &&
1384 seen_default_offset &&
1385 pp->p_fstype != FS_VINUM) {
1386 fprintf(stderr,
1387 "Offset 0x%012jx for partition %c overlaps previous partition which ends at 0x%012jx\n",
1388 (intmax_t)pp->p_boffset,
1389 i + 'a',
1390 (intmax_t)current_offset);
1391 fprintf(stderr,
1392 "Labels with any *'s for offset must be in ascending order by sector\n");
1393 errors++;
1394 } else if (pp->p_boffset != current_offset &&
1395 seen_default_offset) {
1396 /*
1397 * this may give unneeded warnings if
1398 * partitions are out-of-order
1399 */
1400 Warning(
1401 "Offset 0x%012jx for partition %c doesn't match expected value 0x%012jx",
1402 pp->p_boffset, i + 'a',
1403 (intmax_t)current_offset);
1404 }
1405 }
1406 current_offset = pp->p_boffset + pp->p_bsize;
1407 }
1408 }
1409
1410 for (i = 0; i < (int)lp->d_npartitions; i++) {
1411 part = 'a' + i;
1412 pp = &lp->d_partitions[i];
1413 if (pp->p_bsize == 0 && pp->p_boffset != 0)
1414 Warning("partition %c: size 0, but offset 0x%012jx",
1415 part, (intmax_t)pp->p_boffset);
1416 if (pp->p_bsize == 0) {
1417 pp->p_boffset = 0;
1418 continue;
1419 }
1420 if (uuid_is_nil(&pp->p_stor_uuid, NULL))
1421 uuid_create(&pp->p_stor_uuid, NULL);
1422
1423 if (pp->p_boffset < lp->d_pbase) {
1424 fprintf(stderr,
1425 "partition %c: offset out of bounds (%jd)\n",
1426 part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1427 errors++;
1428 }
1429 if (pp->p_boffset > lp->d_pstop) {
1430 fprintf(stderr,
1431 "partition %c: offset out of bounds (%jd)\n",
1432 part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1433 errors++;
1434 }
1435 if (pp->p_boffset + pp->p_bsize > lp->d_pstop) {
1436 fprintf(stderr,
1437 "partition %c: size out of bounds (%jd)\n",
1438 part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1439 errors++;
1440 }
1441
1442 /* check for overlaps */
1443 /* this will check for all possible overlaps once and only once */
1444 for (j = 0; j < i; j++) {
1445 pp2 = &lp->d_partitions[j];
1446 if (pp->p_fstype != FS_VINUM &&
1447 pp2->p_fstype != FS_VINUM &&
1448 part_set[i] && part_set[j]) {
1449 if (pp2->p_boffset < pp->p_boffset + pp->p_bsize &&
1450 (pp2->p_boffset + pp2->p_bsize > pp->p_boffset ||
1451 pp2->p_boffset >= pp->p_boffset)) {
1452 fprintf(stderr,"partitions %c and %c overlap!\n",
1453 j + 'a', i + 'a');
1454 errors++;
1455 }
1456 }
1457 }
1458 }
1459 for (; i < (int)lp->d_npartitions; i++) {
1460 part = 'a' + i;
1461 pp = &lp->d_partitions[i];
1462 if (pp->p_bsize || pp->p_boffset)
1463 Warning("unused partition %c: size 0x%012jx "
1464 "offset 0x%012jx",
1465 'a' + i, (intmax_t)pp->p_bsize,
1466 (intmax_t)pp->p_boffset);
1467 }
1468 return (errors);
1469 }
1470
1471 /*
1472 * When operating on a "virgin" disk, try getting an initial label
1473 * from the associated device driver. This might work for all device
1474 * drivers that are able to fetch some initial device parameters
1475 * without even having access to a (BSD) disklabel, like SCSI disks,
1476 * most IDE drives, or vn devices.
1477 *
1478 * The device name must be given in its "canonical" form.
1479 */
1480 static struct disklabel64 dlab;
1481
1482 struct disklabel64 *
1483 getvirginlabel(void)
1484 {
1485 struct disklabel64 *dl = &dlab;
1486 int f;
1487
1488 if ((f = open(dkname, O_RDONLY)) == -1) {
1489 warn("cannot open %s", dkname);
1490 return (NULL);
1491 }
1492
1493 /*
1494 * Try to use the new get-virgin-label ioctl. If it fails,
1495 * fallback to the old get-disk-info ioctl.
1496 */
1497 if (ioctl(f, DIOCGDVIRGIN64, dl) < 0) {
1498 l_perror("ioctl DIOCGDVIRGIN64");
1499 close(f);
1500 return (NULL);
1501 }
1502 close(f);
1503 return (dl);
1504 }
1505
1506 /*VARARGS1*/
1507 void
1508 Warning(const char *fmt, ...)
1509 {
1510 va_list ap;
1511
1512 fprintf(stderr, "Warning, ");
1513 va_start(ap, fmt);
1514 vfprintf(stderr, fmt, ap);
1515 fprintf(stderr, "\n");
1516 va_end(ap);
1517 }
1518
1519 void
1520 usage(void)
1521 {
1522 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1523 "usage: disklabel64 [-r] disk",
1524 "\t\t(to read label)",
1525 " disklabel64 -w [-r] [-n] disk type [packid]",
1526 "\t\t(to write label with existing boot program)",
1527 " disklabel64 -e [-r] [-n] disk",
1528 "\t\t(to edit label)",
1529 " disklabel64 -R [-r] [-n] disk protofile",
1530 "\t\t(to restore label with existing boot program)",
1531 " disklabel64 -B [-n] [-b boot1 -s boot2] disk [type]",
1532 "\t\t(to install boot program with existing label)",
1533 " disklabel64 -w -B [-n] [-b boot1 -s boot2] disk type [packid]",
1534 "\t\t(to write label and boot program)",
1535 " disklabel64 -R -B [-n] [-b boot1 -s boot2] disk protofile [type]",
1536 "\t\t(to restore label and boot program)",
1537 " disklabel64 [-NW] disk",
1538 "\t\t(to write disable/enable label)");
1539 exit(1);
1540 }
DragonFly BSD