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[dragonfly.git] / sbin / disklabel64 / disklabel64.c
blob68abee91b8b32935779c7796d94e64707cc7fcaf
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
681 uuid_to_string(&lp->d_stor_uuid, &str, NULL);
682 fprintf(f, "diskid: %s\n", str ? str : "<unknown>");
683 free(str);
684
685 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
686 lp->d_packname);
687 fprintf(f, "boot2 data base: 0x%012jx\n", (intmax_t)lp->d_bbase);
688 fprintf(f, "partitions data base: 0x%012jx\n", (intmax_t)lp->d_pbase);
689 fprintf(f, "partitions data stop: 0x%012jx\n", (intmax_t)lp->d_pstop);
690 fprintf(f, "backup label: 0x%012jx\n", (intmax_t)lp->d_abase);
691 fprintf(f, "total size: 0x%012jx\t# %6.2f MB\n",
692 (intmax_t)lp->d_total_size,
693 (double)lp->d_total_size / 1024.0 / 1024.0);
694 fprintf(f, "alignment: %u\n", lp->d_align);
695 fprintf(f, "display block size: %u\t# for partition display only\n",
696 blksize);
697
698 fprintf(f, "\n");
699 fprintf(f, "%u partitions:\n", lp->d_npartitions);
700 fprintf(f, "# size offset fstype fsuuid\n");
701 didany = 0;
702 for (part = 0; part < lp->d_npartitions; part++) {
703 pp = &lp->d_partitions[part];
704 const u_long onemeg = 1024 * 1024;
705
706 if (pp->p_bsize == 0)
707 continue;
708 didany = 1;
709 fprintf(f, " %c: ", 'a' + part);
710
711 if (pp->p_bsize % lp->d_align)
712 fprintf(f, "%10s ", "ILLEGAL");
713 else
714 fprintf(f, "%10ju ", (intmax_t)pp->p_bsize / blksize);
715 if (pp->p_boffset % lp->d_align)
716 fprintf(f, "%10s ", "ILLEGAL");
717 else
718 fprintf(f, "%10ju ",
719 (intmax_t)(pp->p_boffset - lp->d_pbase) / blksize);
720 if (pp->p_fstype < FSMAXTYPES)
721 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
722 else
723 fprintf(f, "%8d", pp->p_fstype);
724 fprintf(f, "\t# %11.3fMB", (double)pp->p_bsize / onemeg);
725 fprintf(f, "\n");
726 }
727 for (part = 0; part < lp->d_npartitions; part++) {
728 pp = &lp->d_partitions[part];
729
730 if (pp->p_bsize == 0)
731 continue;
732
733 if (uuid_is_nil(&lp->d_stor_uuid, NULL) == 0) {
734 fprintf(f, " %c-stor_uuid: ", 'a' + part);
735 str = NULL;
736 uuid_to_string(&pp->p_stor_uuid, &str, NULL);
737 if (str) {
738 fprintf(f, "%s", str);
739 free(str);
740 }
741 fprintf(f, "\n");
742 }
743 }
744 if (didany == 0) {
745 fprintf(f, "# EXAMPLE\n");
746 fprintf(f, "#a: 4g 0 4.2BSD\n");
747 fprintf(f, "#a: * * 4.2BSD\n");
748
749 }
750 fflush(f);
751 }
752
753 int
754 edit(struct disklabel64 *lp, int f)
755 {
756 int c, fd;
757 struct disklabel64 label;
758 FILE *fp;
759
760 if ((fd = mkstemp(tmpfil)) == -1 ||
761 (fp = fdopen(fd, "w")) == NULL) {
762 warnx("can't create %s", tmpfil);
763 return (1);
764 }
765 display(fp, lp);
766 fclose(fp);
767 for (;;) {
768 if (!editit())
769 break;
770 fp = fopen(tmpfil, "r");
771 if (fp == NULL) {
772 warnx("can't reopen %s for reading", tmpfil);
773 break;
774 }
775 bzero((char *)&label, sizeof(label));
776 if (getasciilabel(fp, &label)) {
777 *lp = label;
778 if (writelabel(f, lp) == 0) {
779 fclose(fp);
780 unlink(tmpfil);
781 return (0);
782 }
783 }
784 fclose(fp);
785 printf("re-edit the label? [y]: "); fflush(stdout);
786 c = getchar();
787 if (c != EOF && c != (int)'\n')
788 while (getchar() != (int)'\n')
789 ;
790 if (c == (int)'n')
791 break;
792 }
793 unlink(tmpfil);
794 return (1);
795 }
796
797 int
798 editit(void)
799 {
800 int pid, xpid;
801 int status, omask;
802 const char *ed;
803
804 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
805 while ((pid = fork()) < 0) {
806 if (errno == EPROCLIM) {
807 warnx("you have too many processes");
808 return(0);
809 }
810 if (errno != EAGAIN) {
811 warn("fork");
812 return(0);
813 }
814 sleep(1);
815 }
816 if (pid == 0) {
817 sigsetmask(omask);
818 setgid(getgid());
819 setuid(getuid());
820 if ((ed = getenv("EDITOR")) == NULL)
821 ed = DEFEDITOR;
822 execlp(ed, ed, tmpfil, NULL);
823 err(1, "%s", ed);
824 }
825 while ((xpid = wait(&status)) >= 0)
826 if (xpid == pid)
827 break;
828 sigsetmask(omask);
829 return(!status);
830 }
831
832 char *
833 skip(char *cp)
834 {
835
836 while (*cp != '\0' && isspace(*cp))
837 cp++;
838 if (*cp == '\0' || *cp == '#')
839 return (NULL);
840 return (cp);
841 }
842
843 char *
844 word(char *cp)
845 {
846 char c;
847
848 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
849 cp++;
850 if ((c = *cp) != '\0') {
851 *cp++ = '\0';
852 if (c != '#')
853 return (skip(cp));
854 }
855 return (NULL);
856 }
857
858 /*
859 * Read an ascii label in from fd f,
860 * in the same format as that put out by display(),
861 * and fill in lp.
862 */
863 int
864 getasciilabel(FILE *f, struct disklabel64 *lp)
865 {
866 char *cp;
867 u_int part;
868 char *tp, line[BUFSIZ];
869 u_long v;
870 uint32_t blksize = 0;
871 uint64_t vv;
872 int lineno = 0, errors = 0;
873 char empty[] = "";
874
875 bzero(&part_set, sizeof(part_set));
876 bzero(&part_size_type, sizeof(part_size_type));
877 bzero(&part_offset_type, sizeof(part_offset_type));
878 while (fgets(line, sizeof(line) - 1, f)) {
879 lineno++;
880 if ((cp = strchr(line,'\n')) != 0)
881 *cp = '\0';
882 cp = skip(line);
883 if (cp == NULL)
884 continue;
885 tp = strchr(cp, ':');
886 if (tp == NULL) {
887 fprintf(stderr, "line %d: syntax error\n", lineno);
888 errors++;
889 continue;
890 }
891 *tp++ = '\0', tp = skip(tp);
892 if (sscanf(cp, "%lu partitions", &v) == 1) {
893 if (v == 0 || v > MAXPARTITIONS64) {
894 fprintf(stderr,
895 "line %d: bad # of partitions\n", lineno);
896 lp->d_npartitions = MAXPARTITIONS64;
897 errors++;
898 } else
899 lp->d_npartitions = v;
900 continue;
901 }
902 if (tp == NULL)
903 tp = empty;
904
905 if (streq(cp, "diskid")) {
906 uint32_t status = 0;
907 uuid_from_string(tp, &lp->d_stor_uuid, &status);
908 if (status != uuid_s_ok) {
909 fprintf(stderr,
910 "line %d: %s: illegal UUID\n",
911 lineno, tp);
912 errors++;
913 }
914 continue;
915 }
916 if (streq(cp, "label")) {
917 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
918 continue;
919 }
920
921 if (streq(cp, "alignment")) {
922 v = strtoul(tp, NULL, 0);
923 if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
924 fprintf(stderr,
925 "line %d: %s: bad alignment\n",
926 lineno, tp);
927 errors++;
928 } else {
929 lp->d_align = v;
930 }
931 continue;
932 }
933 if (streq(cp, "total size")) {
934 vv = strtoull(tp, NULL, 0);
935 if (vv == 0 || vv == (uint64_t)-1) {
936 fprintf(stderr, "line %d: %s: bad %s\n",
937 lineno, tp, cp);
938 errors++;
939 } else {
940 lp->d_total_size = vv;
941 }
942 continue;
943 }
944 if (streq(cp, "boot2 data base")) {
945 vv = strtoull(tp, NULL, 0);
946 if (vv == 0 || vv == (uint64_t)-1) {
947 fprintf(stderr, "line %d: %s: bad %s\n",
948 lineno, tp, cp);
949 errors++;
950 } else {
951 lp->d_bbase = vv;
952 }
953 continue;
954 }
955 if (streq(cp, "partitions data base")) {
956 vv = strtoull(tp, NULL, 0);
957 if (vv == 0 || vv == (uint64_t)-1) {
958 fprintf(stderr, "line %d: %s: bad %s\n",
959 lineno, tp, cp);
960 errors++;
961 } else {
962 lp->d_pbase = vv;
963 }
964 continue;
965 }
966 if (streq(cp, "partitions data stop")) {
967 vv = strtoull(tp, NULL, 0);
968 if (vv == 0 || vv == (uint64_t)-1) {
969 fprintf(stderr, "line %d: %s: bad %s\n",
970 lineno, tp, cp);
971 errors++;
972 } else {
973 lp->d_pstop = vv;
974 }
975 continue;
976 }
977 if (streq(cp, "backup label")) {
978 vv = strtoull(tp, NULL, 0);
979 if (vv == 0 || vv == (uint64_t)-1) {
980 fprintf(stderr, "line %d: %s: bad %s\n",
981 lineno, tp, cp);
982 errors++;
983 } else {
984 lp->d_abase = vv;
985 }
986 continue;
987 }
988 if (streq(cp, "display block size")) {
989 v = strtoul(tp, NULL, 0);
990 if (v <= 0 || (v & DEV_BMASK) != 0 || v > 1024*1024) {
991 fprintf(stderr,
992 "line %d: %s: bad alignment\n",
993 lineno, tp);
994 errors++;
995 } else {
996 blksize = v;
997 }
998 continue;
999 }
1000
1001 /* the ':' was removed above */
1002
1003 /*
1004 * Handle main partition data, e.g. a:, b:, etc.
1005 */
1006 if (*cp < 'a' || *cp > MAX_PART) {
1007 fprintf(stderr,
1008 "line %d: %s: Unknown disklabel field\n", lineno,
1009 cp);
1010 errors++;
1011 continue;
1012 }
1013
1014 /* Process a partition specification line. */
1015 part = *cp - 'a';
1016 if (part >= lp->d_npartitions) {
1017 fprintf(stderr,
1018 "line %d: partition name out of range a-%c: %s\n",
1019 lineno, 'a' + lp->d_npartitions - 1, cp);
1020 errors++;
1021 continue;
1022 }
1023
1024 if (blksize == 0) {
1025 fprintf(stderr, "block size to use for partition "
1026 "display was not specified!\n");
1027 errors++;
1028 continue;
1029 }
1030
1031 if (strcmp(cp + 1, "-stor_uuid") == 0) {
1032 if (getasciipartuuid(tp, lp, part, lineno, blksize)) {
1033 errors++;
1034 break;
1035 }
1036 continue;
1037 } else if (cp[1] == 0) {
1038 part_set[part] = 1;
1039 if (getasciipartspec(tp, lp, part, lineno, blksize)) {
1040 errors++;
1041 break;
1042 }
1043 continue;
1044 }
1045 fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1046 lineno, cp);
1047 errors++;
1048 continue;
1049 }
1050 errors += checklabel(lp);
1051 return (errors == 0);
1052 }
1053
1054 static
1055 int
1056 parse_field_val(char **tp, char **cp, u_int64_t *vv, int lineno)
1057 {
1058 char *tmp;
1059
1060 if (*tp == NULL || **tp == 0) {
1061 fprintf(stderr, "line %d: too few numeric fields\n", lineno);
1062 return(-1);
1063 }
1064 *cp = *tp;
1065 *tp = word(*cp);
1066 *vv = strtoull(*cp, &tmp, 0);
1067 if (*vv == ULLONG_MAX) {
1068 fprintf(stderr, "line %d: illegal number\n", lineno);
1069 return(-1);
1070 }
1071 if (tmp)
1072 return(*tmp);
1073 else
1074 return(0);
1075 }
1076
1077 /*
1078 * Read a partition line into partition `part' in the specified disklabel.
1079 * Return 0 on success, 1 on failure.
1080 */
1081 int
1082 getasciipartspec(char *tp, struct disklabel64 *lp, int part,
1083 int lineno, uint32_t blksize)
1084 {
1085 struct partition64 *pp;
1086 char *cp;
1087 const char **cpp;
1088 int r;
1089 u_long v;
1090 uint64_t vv;
1091 uint64_t mpx;
1092
1093 pp = &lp->d_partitions[part];
1094 cp = NULL;
1095
1096 /*
1097 * size
1098 */
1099 r = parse_field_val(&tp, &cp, &vv, lineno);
1100 if (r < 0)
1101 return (1);
1102
1103 mpx = 1;
1104 switch(r) {
1105 case 0:
1106 mpx = blksize;
1107 break;
1108 case '%':
1109 /* mpx = 1; */
1110 break;
1111 case '*':
1112 mpx = 0;
1113 break;
1114 case 'g':
1115 case 'G':
1116 mpx *= 1024ULL;
1117 /* fall through */
1118 case 'm':
1119 case 'M':
1120 mpx *= 1024ULL;
1121 /* fall through */
1122 case 'k':
1123 case 'K':
1124 mpx *= 1024ULL;
1125 r = 0; /* eat the suffix */
1126 break;
1127 default:
1128 Warning("unknown size specifier '%c' (*/%%/K/M/G are valid)",
1129 r);
1130 return(1);
1131 }
1132
1133 part_size_type[part] = r;
1134 if (vv == 0 && r != '*') {
1135 fprintf(stderr,
1136 "line %d: %s: bad partition size (0)\n", lineno, cp);
1137 return (1);
1138 }
1139 pp->p_bsize = vv * mpx;
1140
1141 /*
1142 * offset
1143 */
1144 r = parse_field_val(&tp, &cp, &vv, lineno);
1145 if (r < 0)
1146 return (1);
1147 part_offset_type[part] = r;
1148 switch(r) {
1149 case '*':
1150 pp->p_boffset = 0;
1151 break;
1152 case 0:
1153 pp->p_boffset = vv * blksize + lp->d_pbase;
1154 break;
1155 default:
1156 fprintf(stderr,
1157 "line %d: %s: bad suffix on partition offset (%c)\n",
1158 lineno, cp, r);
1159 return (1);
1160 }
1161
1162 /*
1163 * fstype
1164 */
1165 cp = tp;
1166 tp = word(cp);
1167 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
1168 if (*cpp && strcasecmp(*cpp, cp) == 0)
1169 break;
1170 }
1171 if (*cpp != NULL) {
1172 pp->p_fstype = cpp - fstypenames;
1173 } else {
1174 if (isdigit(*cp))
1175 v = strtoul(cp, NULL, 0);
1176 else
1177 v = FSMAXTYPES;
1178 if (v >= FSMAXTYPES) {
1179 fprintf(stderr,
1180 "line %d: Warning, unknown filesystem type %s\n",
1181 lineno, cp);
1182 v = FS_UNUSED;
1183 }
1184 pp->p_fstype = v;
1185 }
1186
1187 cp = tp;
1188 if (tp) {
1189 fprintf(stderr, "line %d: Warning, extra data on line\n",
1190 lineno);
1191 }
1192 return(0);
1193 }
1194
1195 int
1196 getasciipartuuid(char *tp, struct disklabel64 *lp, int part,
1197 int lineno, uint32_t blksize __unused)
1198 {
1199 struct partition64 *pp;
1200 uint32_t status;
1201 char *cp;
1202
1203 pp = &lp->d_partitions[part];
1204
1205 cp = tp;
1206 tp = word(cp);
1207 uuid_from_string(cp, &pp->p_stor_uuid, &status);
1208 if (status != uuid_s_ok) {
1209 fprintf(stderr, "line %d: Illegal storage uuid specification\n",
1210 lineno);
1211 return(1);
1212 }
1213 return(0);
1214 }
1215
1216 /*
1217 * Check disklabel for errors and fill in
1218 * derived fields according to supplied values.
1219 */
1220 int
1221 checklabel(struct disklabel64 *lp)
1222 {
1223 struct partition64 *pp;
1224 int errors = 0;
1225 char part;
1226 u_int64_t total_size;
1227 u_int64_t current_offset;
1228 u_long total_percent;
1229 int seen_default_offset;
1230 int hog_part;
1231 int i, j;
1232 struct partition64 *pp2;
1233 u_int64_t off;
1234
1235 if (lp->d_align < 512 ||
1236 (lp->d_align ^ (lp->d_align - 1)) != lp->d_align * 2 - 1) {
1237 Warning("Illegal alignment specified: %u\n", lp->d_align);
1238 return (1);
1239 }
1240 if (lp->d_npartitions > MAXPARTITIONS64) {
1241 Warning("number of partitions (%u) > MAXPARTITIONS (%d)",
1242 lp->d_npartitions, MAXPARTITIONS64);
1243 return (1);
1244 }
1245 off = offsetof(struct disklabel64, d_partitions[lp->d_npartitions]);
1246 off = (off + lp->d_align - 1) & ~(int64_t)(lp->d_align - 1);
1247
1248 if (lp->d_bbase < off || lp->d_bbase % lp->d_align) {
1249 Warning("illegal boot2 data base ");
1250 return (1);
1251 }
1252 if (lp->d_pbase < lp->d_bbase || lp->d_pbase % lp->d_align) {
1253 Warning("illegal partition data base");
1254 return (1);
1255 }
1256 if (lp->d_pstop < lp->d_pbase || lp->d_pstop % lp->d_align) {
1257 Warning("illegal partition data stop");
1258 return (1);
1259 }
1260 if (lp->d_pstop > lp->d_total_size) {
1261 printf("%012jx\n%012jx\n",
1262 (intmax_t)lp->d_pstop, (intmax_t)lp->d_total_size);
1263 Warning("disklabel control info is beyond the total size");
1264 return (1);
1265 }
1266 if (lp->d_abase &&
1267 (lp->d_abase < lp->d_pstop || lp->d_pstop % lp->d_align ||
1268 lp->d_abase > lp->d_total_size - off)) {
1269 Warning("illegal backup label location");
1270 return (1);
1271 }
1272
1273 /* first allocate space to the partitions, then offsets */
1274 total_size = 0; /* in bytes */
1275 total_percent = 0; /* in percent */
1276 hog_part = -1;
1277 /* find all fixed partitions */
1278 for (i = 0; i < (int)lp->d_npartitions; i++) {
1279 pp = &lp->d_partitions[i];
1280 if (part_set[i]) {
1281 if (part_size_type[i] == '*') {
1282 if (part_offset_type[i] != '*') {
1283 if (total_size < pp->p_boffset)
1284 total_size = pp->p_boffset;
1285 }
1286 if (hog_part != -1) {
1287 Warning("Too many '*' partitions (%c and %c)",
1288 hog_part + 'a',i + 'a');
1289 } else {
1290 hog_part = i;
1291 }
1292 } else {
1293 off_t size;
1294
1295 size = pp->p_bsize;
1296 if (part_size_type[i] == '%') {
1297 /*
1298 * don't count %'s yet
1299 */
1300 total_percent += size;
1301 } else {
1302 /*
1303 * Value has already been converted
1304 * to bytes.
1305 */
1306 if (size % lp->d_align != 0) {
1307 Warning("partition %c's size is not properly aligned",
1308 i + 'a');
1309 }
1310 total_size += size;
1311 }
1312 }
1313 }
1314 }
1315 /* handle % partitions - note %'s don't need to add up to 100! */
1316 if (total_percent != 0) {
1317 int64_t free_space;
1318 int64_t space_left;
1319
1320 free_space = (int64_t)(lp->d_pstop - lp->d_pbase - total_size);
1321 space_left = free_space;
1322 if (total_percent > 100) {
1323 fprintf(stderr,"total percentage %lu is greater than 100\n",
1324 total_percent);
1325 errors++;
1326 }
1327
1328 if (free_space > 0) {
1329 for (i = 0; i < (int)lp->d_npartitions; i++) {
1330 pp = &lp->d_partitions[i];
1331 if (part_set[i] && part_size_type[i] == '%') {
1332 /* careful of overflows! and integer roundoff */
1333 pp->p_bsize = ((double)pp->p_bsize/100) * free_space;
1334 pp->p_bsize = (pp->p_bsize + lp->d_align - 1) & ~(u_int64_t)(lp->d_align - 1);
1335 if ((int64_t)pp->p_bsize > space_left)
1336 pp->p_bsize = (u_int64_t)space_left;
1337 total_size += pp->p_bsize;
1338 space_left -= pp->p_bsize;
1339 }
1340 }
1341 } else {
1342 fprintf(stderr, "%jd bytes available to give to "
1343 "'*' and '%%' partitions\n",
1344 (intmax_t)free_space);
1345 errors++;
1346 /* fix? set all % partitions to size 0? */
1347 }
1348 }
1349 /* give anything remaining to the hog partition */
1350 if (hog_part != -1) {
1351 lp->d_partitions[hog_part].p_bsize = lp->d_pstop - lp->d_pbase - total_size;
1352 total_size = lp->d_pstop - lp->d_pbase;
1353 }
1354
1355 /* Now set the offsets for each partition */
1356 current_offset = lp->d_pbase;
1357 seen_default_offset = 0;
1358 for (i = 0; i < (int)lp->d_npartitions; i++) {
1359 part = 'a' + i;
1360 pp = &lp->d_partitions[i];
1361 if (pp->p_bsize == 0)
1362 continue;
1363 if (part_set[i]) {
1364 if (part_offset_type[i] == '*') {
1365 pp->p_boffset = current_offset;
1366 seen_default_offset = 1;
1367 } else {
1368 /* allow them to be out of order for old-style tables */
1369 if (pp->p_boffset < current_offset &&
1370 seen_default_offset &&
1371 pp->p_fstype != FS_VINUM) {
1372 fprintf(stderr,
1373 "Offset 0x%012jx for partition %c overlaps previous partition which ends at 0x%012jx\n",
1374 (intmax_t)pp->p_boffset,
1375 i + 'a',
1376 (intmax_t)current_offset);
1377 fprintf(stderr,
1378 "Labels with any *'s for offset must be in ascending order by sector\n");
1379 errors++;
1380 } else if (pp->p_boffset != current_offset &&
1381 seen_default_offset) {
1382 /*
1383 * this may give unneeded warnings if
1384 * partitions are out-of-order
1385 */
1386 Warning(
1387 "Offset 0x%012jx for partition %c doesn't match expected value 0x%012jx",
1388 pp->p_boffset, i + 'a',
1389 (intmax_t)current_offset);
1390 }
1391 }
1392 current_offset = pp->p_boffset + pp->p_bsize;
1393 }
1394 }
1395
1396 for (i = 0; i < (int)lp->d_npartitions; i++) {
1397 part = 'a' + i;
1398 pp = &lp->d_partitions[i];
1399 if (pp->p_bsize == 0 && pp->p_boffset != 0)
1400 Warning("partition %c: size 0, but offset 0x%012jx",
1401 part, (intmax_t)pp->p_boffset);
1402 if (pp->p_bsize == 0) {
1403 pp->p_boffset = 0;
1404 continue;
1405 }
1406 if (uuid_is_nil(&pp->p_stor_uuid, NULL))
1407 uuid_create(&pp->p_stor_uuid, NULL);
1408
1409 if (pp->p_boffset < lp->d_pbase) {
1410 fprintf(stderr,
1411 "partition %c: offset out of bounds (%jd)\n",
1412 part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1413 errors++;
1414 }
1415 if (pp->p_boffset > lp->d_pstop) {
1416 fprintf(stderr,
1417 "partition %c: offset out of bounds (%jd)\n",
1418 part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1419 errors++;
1420 }
1421 if (pp->p_boffset + pp->p_bsize > lp->d_pstop) {
1422 fprintf(stderr,
1423 "partition %c: size out of bounds (%jd)\n",
1424 part, (intmax_t)(pp->p_boffset - lp->d_pbase));
1425 errors++;
1426 }
1427
1428 /* check for overlaps */
1429 /* this will check for all possible overlaps once and only once */
1430 for (j = 0; j < i; j++) {
1431 pp2 = &lp->d_partitions[j];
1432 if (pp->p_fstype != FS_VINUM &&
1433 pp2->p_fstype != FS_VINUM &&
1434 part_set[i] && part_set[j]) {
1435 if (pp2->p_boffset < pp->p_boffset + pp->p_bsize &&
1436 (pp2->p_boffset + pp2->p_bsize > pp->p_boffset ||
1437 pp2->p_boffset >= pp->p_boffset)) {
1438 fprintf(stderr,"partitions %c and %c overlap!\n",
1439 j + 'a', i + 'a');
1440 errors++;
1441 }
1442 }
1443 }
1444 }
1445 for (; i < (int)lp->d_npartitions; i++) {
1446 part = 'a' + i;
1447 pp = &lp->d_partitions[i];
1448 if (pp->p_bsize || pp->p_boffset)
1449 Warning("unused partition %c: size 0x%012jx "
1450 "offset 0x%012jx",
1451 'a' + i, (intmax_t)pp->p_bsize,
1452 (intmax_t)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 int f;
1473
1474 if ((f = open(dkname, O_RDONLY)) == -1) {
1475 warn("cannot open %s", dkname);
1476 return (NULL);
1477 }
1478
1479 /*
1480 * Try to use the new get-virgin-label ioctl. If it fails,
1481 * fallback to the old get-disk-info ioctl.
1482 */
1483 if (ioctl(f, DIOCGDVIRGIN64, dl) < 0) {
1484 l_perror("ioctl DIOCGDVIRGIN64");
1485 close(f);
1486 return (NULL);
1487 }
1488 close(f);
1489 return (dl);
1490 }
1491
1492 /*VARARGS1*/
1493 void
1494 Warning(const char *fmt, ...)
1495 {
1496 va_list ap;
1497
1498 fprintf(stderr, "Warning, ");
1499 va_start(ap, fmt);
1500 vfprintf(stderr, fmt, ap);
1501 fprintf(stderr, "\n");
1502 va_end(ap);
1503 }
1504
1505 void
1506 usage(void)
1507 {
1508 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1509 "usage: disklabel64 [-r] disk",
1510 "\t\t(to read label)",
1511 " disklabel64 -w [-r] [-n] disk type [ packid ]",
1512 "\t\t(to write label with existing boot program)",
1513 " disklabel64 -e [-r] [-n] disk",
1514 "\t\t(to edit label)",
1515 " disklabel64 -R [-r] [-n] disk protofile",
1516 "\t\t(to restore label with existing boot program)",
1517 #if 0
1518 " disklabel64 -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1519 "\t\t(to install boot program with existing label)",
1520 " disklabel64 -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1521 "\t\t(to write label and boot program)",
1522 " disklabel64 -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1523 "\t\t(to restore label and boot program)",
1524 #endif
1525 " disklabel64 [-NW] disk",
1526 "\t\t(to write disable/enable label)");
1527 exit(1);
1528 }
DragonFly BSD