?  search:
summary | log | graphiclog1 | graphiclog2 | refs | edit | fork

8a250ce8a79eeb1bfdaec92b730d6a0bbc706f83
[dragonfly.git] / sbin / disklabel64 / disklabel64.c
blob8a250ce8a79eeb1bfdaec92b730d6a0bbc706f83
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 1.6 2008/07/10 03:15:56 thomas 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 1.6 2008/07/10 03:15:56 thomas 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
89 #include <vfs/ufs/dinode.h>
90 #include <vfs/ufs/fs.h>
91
92 #include <unistd.h>
93 #include <string.h>
94 #include <stdio.h>
95 #include <stdlib.h>
96 #include <signal.h>
97 #include <stdarg.h>
98 #include <stddef.h>
99 #include <ctype.h>
100 #include <err.h>
101 #include <errno.h>
102 #include <disktab.h>
103 #include <uuid.h>
104 #include "pathnames.h"
105
106 extern uint32_t crc32(const void *buf, size_t size);
107
108 /*
109 * Disklabel: read and write disklabels.
110 * The label is usually placed on one of the first sectors of the disk.
111 * Many machines also place a bootstrap in the same area,
112 * in which case the label is embedded in the bootstrap.
113 * The bootstrap source must leave space at the proper offset
114 * for the label on such machines.
115 */
116
117 #define LABELSIZE ((sizeof(struct disklabel64) + 4095) & ~4095)
118 #define BOOTSIZE 32768
119
120 /* FIX! These are too low, but are traditional */
121 #define DEFAULT_NEWFS_BLOCK 8192U
122 #define DEFAULT_NEWFS_FRAG 1024U
123 #define DEFAULT_NEWFS_CPG 16U
124
125 #define BIG_NEWFS_BLOCK 16384U
126 #define BIG_NEWFS_FRAG 2048U
127 #define BIG_NEWFS_CPG 64U
128
129 void makelabel(const char *, const char *, struct disklabel64 *);
130 int writelabel(int, struct disklabel64 *);
131 void l_perror(const char *);
132 struct disklabel64 *readlabel(int);
133 struct disklabel64 *makebootarea(int);
134 void display(FILE *, const struct disklabel64 *);
135 int edit(struct disklabel64 *, int);
136 int editit(void);
137 char *skip(char *);
138 char *word(char *);
139 int getasciilabel(FILE *, struct disklabel64 *);
140 int getasciipartspec(char *, struct disklabel64 *, int, int, uint32_t);
141 int getasciipartuuid(char *, struct disklabel64 *, int, int, uint32_t);
142 int checklabel(struct disklabel64 *);
143 void Warning(const char *, ...) __printflike(1, 2);
144 void usage(void);
145 struct disklabel64 *getvirginlabel(void);
146
147 #define DEFEDITOR _PATH_VI
148 #define streq(a,b) (strcmp(a,b) == 0)
149
150 char *dkname;
151 char *specname;
152 char tmpfil[] = PATH_TMPFILE;
153
154 struct disklabel64 lab;
155
156 #define MAX_PART ('z')
157 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
158 char part_size_type[MAX_NUM_PARTS];
159 char part_offset_type[MAX_NUM_PARTS];
160 int part_set[MAX_NUM_PARTS];
161
162 int installboot; /* non-zero if we should install a boot program */
163 int boot1size;
164 int boot1lsize;
165 int boot2size;
166 char *boot1buf;
167 char *boot2buf;
168 char *boot1path;
169 char *boot2path;
170
171 enum {
172 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
173 } op = UNSPEC;
174
175 int rflag;
176 int Vflag;
177 int disable_write; /* set to disable writing to disk label */
178 u_int32_t slice_start_lba;
179
180 #ifdef DEBUG
181 int debug;
182 #define OPTIONS "BNRWb:denrs:Vw"
183 #else
184 #define OPTIONS "BNRWb:enrs:Vw"
185 #endif
186
187 int
188 main(int argc, char *argv[])
189 {
190 struct disklabel64 *lp;
191 FILE *t;
192 int ch, f = 0, flag, error = 0;
193 char *name = 0;
194
195 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
196 switch (ch) {
197 case 'B':
198 ++installboot;
199 break;
200 case 'b':
201 boot1path = optarg;
202 break;
203
204 case 's':
205 boot2path = optarg;
206 break;
207 case 'N':
208 if (op != UNSPEC)
209 usage();
210 op = NOWRITE;
211 break;
212 case 'n':
213 disable_write = 1;
214 break;
215 case 'R':
216 if (op != UNSPEC)
217 usage();
218 op = RESTORE;
219 break;
220 case 'W':
221 if (op != UNSPEC)
222 usage();
223 op = WRITEABLE;
224 break;
225 case 'e':
226 if (op != UNSPEC)
227 usage();
228 op = EDIT;
229 break;
230 case 'V':
231 ++Vflag;
232 break;
233 case 'r':
234 ++rflag;
235 break;
236 case 'w':
237 if (op != UNSPEC)
238 usage();
239 op = WRITE;
240 break;
241 #ifdef DEBUG
242 case 'd':
243 debug++;
244 break;
245 #endif
246 case '?':
247 default:
248 usage();
249 }
250 argc -= optind;
251 argv += optind;
252 if (installboot) {
253 rflag++;
254 if (op == UNSPEC)
255 op = WRITEBOOT;
256 } else {
257 if (op == UNSPEC)
258 op = READ;
259 boot1path = NULL;
260 boot2path = NULL;
261 }
262 if (argc < 1)
263 usage();
264
265 dkname = argv[0];
266 if (dkname[0] != '/') {
267 asprintf(&specname, "%s%s", _PATH_DEV, dkname);
268 } else {
269 specname = dkname;
270 }
271 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
272 if (f < 0 && errno == ENOENT && dkname[0] != '/') {
273 asprintf(&specname, "%s%s", _PATH_DEV, dkname);
274 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
275 }
276 if (f < 0)
277 err(4, "%s", specname);
278
279 switch(op) {
280
281 case UNSPEC:
282 break;
283
284 case EDIT:
285 if (argc != 1)
286 usage();
287 lp = readlabel(f);
288 error = edit(lp, f);
289 break;
290
291 case NOWRITE:
292 flag = 0;
293 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
294 err(4, "ioctl DIOCWLABEL");
295 break;
296
297 case READ:
298 if (argc != 1)
299 usage();
300 lp = readlabel(f);
301 display(stdout, lp);
302 error = checklabel(lp);
303 break;
304
305 case RESTORE:
306 if (installboot && argc == 3) {
307 makelabel(argv[2], 0, &lab);
308 argc--;
309
310 /*
311 * We only called makelabel() for its side effect
312 * of setting the bootstrap file names. Discard
313 * all changes to `lab' so that all values in the
314 * final label come from the ASCII label.
315 */
316 bzero((char *)&lab, sizeof(lab));
317 }
318 if (argc != 2)
319 usage();
320 if (!(t = fopen(argv[1], "r")))
321 err(4, "%s", argv[1]);
322 if (!getasciilabel(t, &lab))
323 exit(1);
324 lp = makebootarea(f);
325 bcopy(&lab.d_magic, &lp->d_magic,
326 sizeof(lab) - offsetof(struct disklabel64, d_magic));
327 error = writelabel(f, lp);
328 break;
329
330 case WRITE:
331 if (argc == 3) {
332 name = argv[2];
333 argc--;
334 }
335 if (argc != 2)
336 usage();
337 makelabel(argv[1], name, &lab);
338 lp = makebootarea(f);
339 bcopy(&lab.d_magic, &lp->d_magic,
340 sizeof(lab) - offsetof(struct disklabel64, d_magic));
341 if (checklabel(lp) == 0)
342 error = writelabel(f, lp);
343 break;
344
345 case WRITEABLE:
346 flag = 1;
347 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
348 err(4, "ioctl DIOCWLABEL");
349 break;
350
351 case WRITEBOOT:
352 {
353 struct disklabel64 tlab;
354
355 lp = readlabel(f);
356 tlab = *lp;
357 if (argc == 2)
358 makelabel(argv[1], 0, &lab);
359 lp = makebootarea(f);
360 bcopy(&tlab.d_magic, &lp->d_magic,
361 sizeof(tlab) - offsetof(struct disklabel64, d_magic));
362 if (checklabel(lp) == 0)
363 error = writelabel(f, lp);
364 break;
365 }
366 }
367 exit(error);
368 }
369
370 /*
371 * Construct a prototype disklabel from /etc/disktab. As a side
372 * effect, set the names of the primary and secondary boot files
373 * if specified.
374 */
375 void
376 makelabel(const char *type, const char *name, struct disklabel64 *lp)
377 {
378 struct disklabel64 *dp;
379
380 if (strcmp(type, "auto") == 0)
381 dp = getvirginlabel();
382 else
383 dp = NULL;
384 if (dp == NULL)
385 errx(1, "%s: unknown disk type", type);
386 *lp = *dp;
387
388 /*
389 * NOTE: boot control files may no longer be specified in disktab.
390 */
391 if (name)
392 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
393 }
394
395 int
396 writelabel(int f, struct disklabel64 *lp)
397 {
398 struct disklabel64 *blp;
399 int flag;
400 int r;
401 size_t lpsize;
402 size_t lpcrcsize;
403
404 lpsize = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
405 lpcrcsize = lpsize - offsetof(struct disklabel64, d_magic);
406
407 if (disable_write) {
408 Warning("write to disk label suppressed - label was as follows:");
409 display(stdout, lp);
410 return (0);
411 } else {
412 lp->d_magic = DISKMAGIC64;
413 lp->d_crc = 0;
414 lp->d_crc = crc32(&lp->d_magic, lpcrcsize);
415 if (rflag) {
416 /*
417 * Make sure the boot area is not too large
418 */
419 if (boot2buf) {
420 int lpbsize = (int)(lp->d_pbase - lp->d_bbase);
421 if (lp->d_pbase == 0) {
422 errx(1, "no space was set aside in "
423 "the disklabel for boot2!");
424 }
425 if (boot2size > lpbsize) {
426 errx(1, "label did not reserve enough "
427 "space for boot! %d/%d",
428 boot2size, lpbsize);
429 }
430 }
431
432 /*
433 * First set the kernel disk label,
434 * then write a label to the raw disk.
435 * If the SDINFO ioctl fails because it is
436 * unimplemented, keep going; otherwise, the kernel
437 * consistency checks may prevent us from changing
438 * the current (in-core) label.
439 */
440 if (ioctl(f, DIOCSDINFO64, lp) < 0 &&
441 errno != ENODEV && errno != ENOTTY) {
442 l_perror("ioctl DIOCSDINFO");
443 return (1);
444 }
445 lseek(f, (off_t)0, SEEK_SET);
446
447 /*
448 * The disklabel embeds areas which we may not
449 * have wanted to change. Merge those areas in
450 * from disk.
451 */
452 blp = makebootarea(f);
453 if (blp != lp) {
454 bcopy(&lp->d_magic, &blp->d_magic,
455 sizeof(*lp) -
456 offsetof(struct disklabel64, d_magic));
457 }
458
459 /*
460 * write enable label sector before write
461 * (if necessary), disable after writing.
462 */
463 flag = 1;
464 if (ioctl(f, DIOCWLABEL, &flag) < 0)
465 warn("ioctl DIOCWLABEL");
466
467 r = write(f, boot1buf, boot1lsize);
468 if (r != (ssize_t)boot1lsize) {
469 warn("write");
470 return (1);
471 }
472 /*
473 * Output the remainder of the disklabel
474 */
475 if (boot2buf) {
476 lseek(f, lp->d_bbase, 0);
477 r = write(f, boot2buf, boot2size);
478 if (r != boot2size) {
479 warn("write");
480 return(1);
481 }
482 }
483 flag = 0;
484 ioctl(f, DIOCWLABEL, &flag);
485 } else if (ioctl(f, DIOCWDINFO64, lp) < 0) {
486 l_perror("ioctl DIOCWDINFO64");
487 return (1);
488 }
489 }
490 return (0);
491 }
492
493 void
494 l_perror(const char *s)
495 {
496 switch (errno) {
497
498 case ESRCH:
499 warnx("%s: no disk label on disk;", s);
500 fprintf(stderr, "add \"-r\" to install initial label\n");
501 break;
502
503 case EINVAL:
504 warnx("%s: label magic number or checksum is wrong!", s);
505 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
506 break;
507
508 case EBUSY:
509 warnx("%s: open partition would move or shrink", s);
510 break;
511
512 case ENOATTR:
513 warnx("%s: the disk already has a label of a different type,\n"
514 "probably a 32 bit disklabel. It must be cleaned out "
515 "first.\n", s);
516 break;
517
518 default:
519 warn((char *)NULL);
520 break;
521 }
522 }
523
524 /*
525 * Fetch disklabel for disk.
526 * Use ioctl to get label unless -r flag is given.
527 */
528 struct disklabel64 *
529 readlabel(int f)
530 {
531 struct disklabel64 *lp;
532 u_int32_t savecrc;
533 size_t lpcrcsize;
534
535 if (rflag) {
536 /*
537 * Allocate space for the label. The boot1 code, if any,
538 * is embedded in the label. The label overlaps the boot1
539 * code.
540 */
541 lp = makebootarea(f);
542 lpcrcsize = offsetof(struct disklabel64,
543 d_partitions[lp->d_npartitions]) -
544 offsetof(struct disklabel64, d_magic);
545 savecrc = lp->d_crc;
546 lp->d_crc = 0;
547 if (lp->d_magic != DISKMAGIC64)
548 errx(1, "bad pack magic number");
549 if (lp->d_npartitions > MAXPARTITIONS64 ||
550 savecrc != crc32(&lp->d_magic, lpcrcsize)
551 ) {
552 errx(1, "corrupted disklabel64");
553 }
554 lp->d_crc = savecrc;
555 } else {
556 /*
557 * Just use a static structure to hold the label. Note
558 * that DIOCSDINFO64 does not overwrite the boot1 area
559 * even though it is part of the disklabel64 structure.
560 */
561 lp = &lab;
562 if (Vflag) {
563 if (ioctl(f, DIOCGDVIRGIN64, lp) < 0) {
564 l_perror("ioctl DIOCGDVIRGIN64");
565 exit(4);
566 }
567 } else {
568 if (ioctl(f, DIOCGDINFO64, lp) < 0) {
569 l_perror("ioctl DIOCGDINFO64");
570 exit(4);
571 }
572 }
573 }
574 return (lp);
575 }
576
577 /*
578 * Construct a boot area for boot1 and boot2 and return the location of
579 * the label within the area. The caller will overwrite the label so
580 * we don't actually have to read it.
581 */
582 struct disklabel64 *
583 makebootarea(int f)
584 {
585 struct disklabel64 *lp;
586 struct partinfo info;
587 u_int32_t secsize;
588 struct stat st;
589 int fd;
590 int r;
591
592 if (ioctl(f, DIOCGPART, &info) == 0)
593 secsize = info.media_blksize;
594 else
595 secsize = 512;
596
597 if (boot1buf == NULL) {
598 size_t rsize;
599
600 rsize = (sizeof(struct disklabel64) + secsize - 1) &
601 ~(secsize - 1);
602 boot1size = offsetof(struct disklabel64, d_magic);
603 boot1lsize = rsize;
604 boot1buf = malloc(rsize);
605 bzero(boot1buf, rsize);
606 r = read(f, boot1buf, rsize);
607 if (r != (int)rsize)
608 err(4, "%s", specname);
609 }
610 lp = (void *)boot1buf;
611
612 if (installboot == 0)
613 return(lp);
614
615 if (boot2buf == NULL) {
616 boot2size = 32768;
617 boot2buf = malloc(boot2size);
618 bzero(boot2buf, boot2size);
619 }
620
621 /*
622 * If installing the boot code, read it into the appropriate portions
623 * of the buffer(s)
624 */
625 if (boot1path == NULL)
626 asprintf(&boot1path, "%s/boot1_64", _PATH_BOOTDIR);
627 if (boot2path == NULL)
628 asprintf(&boot2path, "%s/boot2_64", _PATH_BOOTDIR);
629
630 if ((fd = open(boot1path, O_RDONLY)) < 0)
631 err(4, "%s", boot1path);
632 if (fstat(fd, &st) < 0)
633 err(4, "%s", boot1path);
634 if (st.st_size > boot1size)
635 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
636 if (read(fd, boot1buf, boot1size) != boot1size)
637 err(4, "%s must be exactly %d bytes!", boot1path, boot1size);
638 close(fd);
639
640 if ((fd = open(boot2path, O_RDONLY)) < 0)
641 err(4, "%s", boot2path);
642 if (fstat(fd, &st) < 0)
643 err(4, "%s", boot2path);
644 if (st.st_size > boot2size)
645 err(4, "%s must be <= %d bytes!", boot2path, boot2size);
646 if ((r = read(fd, boot2buf, boot2size)) < 1)
647 err(4, "%s is empty!", boot2path);
648 boot2size = (r + secsize - 1) & ~(secsize - 1);
649 close(fd);
650
651 /*
652 * XXX dangerously dedicated support goes here XXX
653 */
654 return (lp);
655 }
656
657 void
658 display(FILE *f, const struct disklabel64 *lp)
659 {
660 const struct partition64 *pp;
661 char *str;
662 unsigned int part;
663 int didany;
664 uint32_t blksize;
665
666 /*
667 * Use a human readable block size if possible. This is for
668 * display and editing purposes only.
669 */
670 if (lp->d_align > 1024)
671 blksize = 1024;
672 else
673 blksize = lp->d_align;
674
675 fprintf(f, "# %s:\n", specname);
676 fprintf(f, "#\n");
677 fprintf(f, "# Informational fields calculated from the above\n");
678 fprintf(f, "# All byte equivalent offsets must be aligned\n");
679 fprintf(f, "#\n");
680 fprintf(f, "# boot space: %10llu bytes\n", lp->d_pbase - lp->d_bbase);
681 fprintf(f, "# data space: %10llu blocks\t# %6.2f MB (%llu bytes)\n",
682 (lp->d_pstop - lp->d_pbase) / blksize,
683 (double)(lp->d_pstop - lp->d_pbase) / 1024.0 / 1024.0,
684 lp->d_pstop - lp->d_pbase);
685 fprintf(f, "#\n");
686
687 uuid_to_string(&lp->d_stor_uuid, &str, NULL);
688 fprintf(f, "diskid: %s\n", str ? str : "<unknown>");
689 free(str);
690
691 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
692 lp->d_packname);
693 fprintf(f, "boot2 data base: 0x%012llx\n", lp->d_bbase);
694 fprintf(f, "partitions data base: 0x%012llx\n", lp->d_pbase);
695 fprintf(f, "partitions data stop: 0x%012llx\n", lp->d_pstop);
696 fprintf(f, "backup label: 0x%012llx\n", lp->d_abase);
697 fprintf(f, "total size: 0x%012llx\t# %6.2f MB\n",
698 lp->d_total_size,
699 (double)lp->d_total_size / 1024.0 / 1024.0);
700 fprintf(f, "alignment: %u\n", lp->d_align);
701 fprintf(f, "display block size: %u\t# for partition display only\n",
702 blksize);
703
704 fprintf(f, "\n");
705 fprintf(f, "%u partitions:\n", lp->d_npartitions);
706 fprintf(f, "# size offset fstype fsuuid\n");
707 didany = 0;
708 for (part = 0; part < lp->d_npartitions; part++) {
709 pp = &lp->d_partitions[part];
710 const u_long onemeg = 1024 * 1024;
711
712 if (pp->p_bsize == 0)
713 continue;
714 didany = 1;
715 fprintf(f, " %c: ", 'a' + part);
716
717 if (pp->p_bsize % lp->d_align)
718 fprintf(f, "%10s ", "ILLEGAL");
719 else
720 fprintf(f, "%10llu ", pp->p_bsize / blksize);
721 if (pp->p_boffset % lp->d_align)
722 fprintf(f, "%10s ", "ILLEGAL");
723 else
724 fprintf(f, "%10llu ", (pp->p_boffset - lp->d_pbase) / blksize);
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")) == (char *)0)
826 ed = DEFEDITOR;
827 execlp(ed, ed, tmpfil, (char *)0);
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 && streq(*cpp, cp))
1174 break;
1175 if (*cpp != NULL) {
1176 pp->p_fstype = cpp - fstypenames;
1177 } else {
1178 if (isdigit(*cp))
1179 v = strtoul(cp, NULL, 0);
1180 else
1181 v = FSMAXTYPES;
1182 if (v >= FSMAXTYPES) {
1183 fprintf(stderr,
1184 "line %d: Warning, unknown filesystem type %s\n",
1185 lineno, cp);
1186 v = FS_UNUSED;
1187 }
1188 pp->p_fstype = v;
1189 }
1190
1191 cp = tp;
1192 if (tp) {
1193 fprintf(stderr, "line %d: Warning, extra data on line\n",
1194 lineno);
1195 }
1196 return(0);
1197 }
1198
1199 int
1200 getasciipartuuid(char *tp, struct disklabel64 *lp, int part,
1201 int lineno, uint32_t blksize __unused)
1202 {
1203 struct partition64 *pp;
1204 uint32_t status;
1205 char *cp;
1206
1207 pp = &lp->d_partitions[part];
1208
1209 cp = tp;
1210 tp = word(cp);
1211 uuid_from_string(cp, &pp->p_stor_uuid, &status);
1212 if (status != uuid_s_ok) {
1213 fprintf(stderr, "line %d: Illegal storage uuid specification\n",
1214 lineno);
1215 return(1);
1216 }
1217 return(0);
1218 }
1219
1220 /*
1221 * Check disklabel for errors and fill in
1222 * derived fields according to supplied values.
1223 */
1224 int
1225 checklabel(struct disklabel64 *lp)
1226 {
1227 struct partition64 *pp;
1228 int errors = 0;
1229 char part;
1230 u_int64_t total_size;
1231 u_int64_t current_offset;
1232 u_long total_percent;
1233 int seen_default_offset;
1234 int hog_part;
1235 int i, j;
1236 struct partition64 *pp2;
1237 u_int64_t off;
1238
1239 if (lp->d_align < 512 ||
1240 (lp->d_align ^ (lp->d_align - 1)) != lp->d_align * 2 - 1) {
1241 Warning("Illegal alignment specified: %u\n", lp->d_align);
1242 return (1);
1243 }
1244 if (lp->d_npartitions > MAXPARTITIONS64) {
1245 Warning("number of partitions (%u) > MAXPARTITIONS (%d)",
1246 lp->d_npartitions, MAXPARTITIONS64);
1247 return (1);
1248 }
1249 off = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
1250 off = (off + lp->d_align - 1) & ~(int64_t)(lp->d_align - 1);
1251
1252 if (lp->d_bbase < off || lp->d_bbase % lp->d_align) {
1253 Warning("illegal boot2 data base ");
1254 return (1);
1255 }
1256 if (lp->d_pbase < lp->d_bbase || lp->d_pbase % lp->d_align) {
1257 Warning("illegal partition data base");
1258 return (1);
1259 }
1260 if (lp->d_pstop < lp->d_pbase || lp->d_pstop % lp->d_align) {
1261 Warning("illegal partition data stop");
1262 return (1);
1263 }
1264 if (lp->d_pstop > lp->d_total_size) {
1265 printf("%012llx\n%012llx\n", lp->d_pstop, lp->d_total_size);
1266 Warning("disklabel control info is beyond the total size");
1267 return (1);
1268 }
1269 if (lp->d_abase &&
1270 (lp->d_abase < lp->d_pstop || lp->d_pstop % lp->d_align ||
1271 lp->d_abase > lp->d_total_size - off)) {
1272 Warning("illegal backup label location");
1273 return (1);
1274 }
1275
1276 /* first allocate space to the partitions, then offsets */
1277 total_size = 0; /* in bytes */
1278 total_percent = 0; /* in percent */
1279 hog_part = -1;
1280 /* find all fixed partitions */
1281 for (i = 0; i < (int)lp->d_npartitions; i++) {
1282 pp = &lp->d_partitions[i];
1283 if (part_set[i]) {
1284 if (part_size_type[i] == '*') {
1285 if (part_offset_type[i] != '*') {
1286 if (total_size < pp->p_boffset)
1287 total_size = pp->p_boffset;
1288 }
1289 if (hog_part != -1) {
1290 Warning("Too many '*' partitions (%c and %c)",
1291 hog_part + 'a',i + 'a');
1292 } else {
1293 hog_part = i;
1294 }
1295 } else {
1296 off_t size;
1297
1298 size = pp->p_bsize;
1299 if (part_size_type[i] == '%') {
1300 /*
1301 * don't count %'s yet
1302 */
1303 total_percent += size;
1304 } else {
1305 /*
1306 * Value has already been converted
1307 * to bytes.
1308 */
1309 if (size % lp->d_align != 0) {
1310 Warning("partition %c's size is not properly aligned",
1311 i + 'a');
1312 }
1313 total_size += size;
1314 }
1315 }
1316 }
1317 }
1318 /* handle % partitions - note %'s don't need to add up to 100! */
1319 if (total_percent != 0) {
1320 int64_t free_space;
1321 int64_t space_left;
1322
1323 free_space = (int64_t)(lp->d_pstop - lp->d_pbase - total_size);
1324 space_left = free_space;
1325 if (total_percent > 100) {
1326 fprintf(stderr,"total percentage %lu is greater than 100\n",
1327 total_percent);
1328 errors++;
1329 }
1330
1331 if (free_space > 0) {
1332 for (i = 0; i < (int)lp->d_npartitions; i++) {
1333 pp = &lp->d_partitions[i];
1334 if (part_set[i] && part_size_type[i] == '%') {
1335 /* careful of overflows! and integer roundoff */
1336 pp->p_bsize = ((double)pp->p_bsize/100) * free_space;
1337 pp->p_bsize = (pp->p_bsize + lp->d_align - 1) & ~(u_int64_t)(lp->d_align - 1);
1338 if ((int64_t)pp->p_bsize > space_left)
1339 pp->p_bsize = (u_int64_t)space_left;
1340 total_size += pp->p_bsize;
1341 space_left -= pp->p_bsize;
1342 }
1343 }
1344 } else {
1345 fprintf(stderr,
1346 "%lld bytes available to give to '*' and '%%' partitions\n",
1347 free_space);
1348 errors++;
1349 /* fix? set all % partitions to size 0? */
1350 }
1351 }
1352 /* give anything remaining to the hog partition */
1353 if (hog_part != -1) {
1354 lp->d_partitions[hog_part].p_bsize = lp->d_pstop - lp->d_pbase - total_size;
1355 total_size = lp->d_pstop - lp->d_pbase;
1356 }
1357
1358 /* Now set the offsets for each partition */
1359 current_offset = lp->d_pbase;
1360 seen_default_offset = 0;
1361 for (i = 0; i < (int)lp->d_npartitions; i++) {
1362 part = 'a' + i;
1363 pp = &lp->d_partitions[i];
1364 if (pp->p_bsize == 0)
1365 continue;
1366 if (part_set[i]) {
1367 if (part_offset_type[i] == '*') {
1368 pp->p_boffset = current_offset;
1369 seen_default_offset = 1;
1370 } else {
1371 /* allow them to be out of order for old-style tables */
1372 if (pp->p_boffset < current_offset &&
1373 seen_default_offset &&
1374 pp->p_fstype != FS_VINUM) {
1375 fprintf(stderr,
1376 "Offset 0x%012llx for partition %c overlaps previous partition which ends at 0x%012llx\n",
1377 pp->p_boffset, i + 'a',
1378 current_offset);
1379 fprintf(stderr,
1380 "Labels with any *'s for offset must be in ascending order by sector\n");
1381 errors++;
1382 } else if (pp->p_boffset != current_offset &&
1383 seen_default_offset) {
1384 /*
1385 * this may give unneeded warnings if
1386 * partitions are out-of-order
1387 */
1388 Warning(
1389 "Offset 0x%012llx for partition %c doesn't match expected value 0x%012llx",
1390 pp->p_boffset, i + 'a',
1391 current_offset);
1392 }
1393 }
1394 current_offset = pp->p_boffset + pp->p_bsize;
1395 }
1396 }
1397
1398 for (i = 0; i < (int)lp->d_npartitions; i++) {
1399 part = 'a' + i;
1400 pp = &lp->d_partitions[i];
1401 if (pp->p_bsize == 0 && pp->p_boffset != 0)
1402 Warning("partition %c: size 0, but offset 0x%012llx",
1403 part, pp->p_boffset);
1404 if (pp->p_bsize == 0) {
1405 pp->p_boffset = 0;
1406 continue;
1407 }
1408 if (uuid_is_nil(&pp->p_stor_uuid, NULL))
1409 uuid_create(&pp->p_stor_uuid, NULL);
1410
1411 if (pp->p_boffset < lp->d_pbase) {
1412 fprintf(stderr,
1413 "partition %c: offset out of bounds (%lld)\n",
1414 part, pp->p_boffset - lp->d_pbase);
1415 errors++;
1416 }
1417 if (pp->p_boffset > lp->d_pstop) {
1418 fprintf(stderr,
1419 "partition %c: offset out of bounds (%lld)\n",
1420 part, pp->p_boffset - lp->d_pbase);
1421 errors++;
1422 }
1423 if (pp->p_boffset + pp->p_bsize > lp->d_pstop) {
1424 fprintf(stderr,
1425 "partition %c: size out of bounds (%lld)\n",
1426 part, pp->p_boffset - lp->d_pbase);
1427 errors++;
1428 }
1429
1430 /* check for overlaps */
1431 /* this will check for all possible overlaps once and only once */
1432 for (j = 0; j < i; j++) {
1433 pp2 = &lp->d_partitions[j];
1434 if (pp->p_fstype != FS_VINUM &&
1435 pp2->p_fstype != FS_VINUM &&
1436 part_set[i] && part_set[j]) {
1437 if (pp2->p_boffset < pp->p_boffset + pp->p_bsize &&
1438 (pp2->p_boffset + pp2->p_bsize > pp->p_boffset ||
1439 pp2->p_boffset >= pp->p_boffset)) {
1440 fprintf(stderr,"partitions %c and %c overlap!\n",
1441 j + 'a', i + 'a');
1442 errors++;
1443 }
1444 }
1445 }
1446 }
1447 for (; i < (int)lp->d_npartitions; i++) {
1448 part = 'a' + i;
1449 pp = &lp->d_partitions[i];
1450 if (pp->p_bsize || pp->p_boffset)
1451 Warning("unused partition %c: size 0x%012llx offset 0x%012llx",
1452 'a' + i, pp->p_bsize, pp->p_boffset);
1453 }
1454 return (errors);
1455 }
1456
1457 /*
1458 * When operating on a "virgin" disk, try getting an initial label
1459 * from the associated device driver. This might work for all device
1460 * drivers that are able to fetch some initial device parameters
1461 * without even having access to a (BSD) disklabel, like SCSI disks,
1462 * most IDE drives, or vn devices.
1463 *
1464 * The device name must be given in its "canonical" form.
1465 */
1466 static struct disklabel64 dlab;
1467
1468 struct disklabel64 *
1469 getvirginlabel(void)
1470 {
1471 struct disklabel64 *dl = &dlab;
1472 char *path;
1473 int f;
1474
1475 if (dkname[0] == '/') {
1476 warnx("\"auto\" requires the usage of a canonical disk name");
1477 return (NULL);
1478 }
1479 asprintf(&path, "%s%s", _PATH_DEV, dkname);
1480 if ((f = open(path, O_RDONLY)) == -1) {
1481 warn("cannot open %s", path);
1482 return (NULL);
1483 }
1484
1485 /*
1486 * Try to use the new get-virgin-label ioctl. If it fails,
1487 * fallback to the old get-disk-info ioctl.
1488 */
1489 if (ioctl(f, DIOCGDVIRGIN64, dl) < 0) {
1490 l_perror("ioctl DIOCGDVIRGIN64");
1491 close(f);
1492 return (NULL);
1493 }
1494 close(f);
1495 return (dl);
1496 }
1497
1498 /*VARARGS1*/
1499 void
1500 Warning(const char *fmt, ...)
1501 {
1502 va_list ap;
1503
1504 fprintf(stderr, "Warning, ");
1505 va_start(ap, fmt);
1506 vfprintf(stderr, fmt, ap);
1507 fprintf(stderr, "\n");
1508 va_end(ap);
1509 }
1510
1511 void
1512 usage(void)
1513 {
1514 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",
1515 "usage: disklabel64 [-r] disk",
1516 "\t\t(to read label)",
1517 " disklabel64 -w [-r] [-n] disk type [ packid ]",
1518 "\t\t(to write label with existing boot program)",
1519 " disklabel64 -e [-r] [-n] disk",
1520 "\t\t(to edit label)",
1521 " disklabel64 -R [-r] [-n] disk protofile",
1522 "\t\t(to restore label with existing boot program)",
1523 " disklabel64 -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1524 "\t\t(to install boot program with existing label)",
1525 " disklabel64 -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1526 "\t\t(to write label and boot program)",
1527 " disklabel64 -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1528 "\t\t(to restore label and boot program)",
1529 " disklabel64 [-NW] disk",
1530 "\t\t(to write disable/enable label)");
1531 exit(1);
1532 }
DragonFly BSD