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MFC r1.6 r1.30 r1.28 (HEAD):
[dragonfly.git] / sbin / disklabel / disklabel.c
blobf10714c7548d4ac4526c0cdda88a7f697630a1f3
1 /*
2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Symmetric Computer Systems.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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 the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)disklabel.c 1.2 (Symmetric) 11/28/85
38 * @(#)disklabel.c 8.2 (Berkeley) 1/7/94
39 * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
40 * $DragonFly: src/sbin/disklabel/disklabel.c,v 1.27.2.1 2008/09/16 21:54:32 thomas Exp $
41 */
42
43 #include <sys/param.h>
44 #include <sys/file.h>
45 #include <sys/stat.h>
46 #include <sys/wait.h>
47 #define DKTYPENAMES
48 #include <sys/disklabel32.h>
49 #include <sys/disklabel64.h>
50 #include <sys/diskslice.h>
51 #include <sys/diskmbr.h>
52 #include <sys/dtype.h>
53 #include <sys/sysctl.h>
54 #include <disktab.h>
55
56 #include <vfs/ufs/dinode.h>
57 #include <vfs/ufs/fs.h>
58
59 #include <unistd.h>
60 #include <string.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <signal.h>
64 #include <stdarg.h>
65 #include <ctype.h>
66 #include <err.h>
67 #include <errno.h>
68 #include <disktab.h>
69 #include "pathnames.h"
70
71 /*
72 * Disklabel: read and write disklabels.
73 * The label is usually placed on one of the first sectors of the disk.
74 * Many machines also place a bootstrap in the same area,
75 * in which case the label is embedded in the bootstrap.
76 * The bootstrap source must leave space at the proper offset
77 * for the label on such machines.
78 */
79
80 #ifndef BBSIZE
81 #define BBSIZE 8192 /* size of boot area, with label */
82 #endif
83
84 /* FIX! These are too low, but are traditional */
85 #define DEFAULT_NEWFS_BLOCK 8192U
86 #define DEFAULT_NEWFS_FRAG 1024U
87 #define DEFAULT_NEWFS_CPG 16U
88
89 #define BIG_NEWFS_BLOCK 16384U
90 #define BIG_NEWFS_FRAG 2048U
91 #define BIG_NEWFS_CPG 64U
92
93 #define NUMBOOT 2
94
95 void makelabel(const char *, const char *, struct disklabel32 *);
96 int writelabel(int, const char *, struct disklabel32 *);
97 void l_perror(const char *);
98 struct disklabel32 *readlabel(int);
99 struct disklabel32 *makebootarea(char *, struct disklabel32 *, int);
100 void display(FILE *, const struct disklabel32 *);
101 int edit(struct disklabel32 *, int);
102 int editit(void);
103 char *skip(char *);
104 char *word(char *);
105 int getasciilabel(FILE *, struct disklabel32 *);
106 int getasciipartspec(char *, struct disklabel32 *, int, int);
107 int checklabel(struct disklabel32 *);
108 void setbootflag(struct disklabel32 *);
109 void Warning(const char *, ...) __printflike(1, 2);
110 void usage(void);
111 int checkoldboot(int, const char *);
112 const char *fixlabel(int, struct disklabel32 *, int);
113 struct disklabel32 *getvirginlabel(void);
114 struct disklabel32 *getdisklabelfromdisktab(const char *name);
115
116 #define DEFEDITOR _PATH_VI
117 #define streq(a,b) (strcmp(a,b) == 0)
118
119 char *dkname;
120 char *specname;
121 char tmpfil[] = PATH_TMPFILE;
122
123 char namebuf[BBSIZE], *np = namebuf;
124 struct disklabel32 lab;
125 char bootarea[BBSIZE];
126
127 #define MAX_PART ('z')
128 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
129 char part_size_type[MAX_NUM_PARTS];
130 char part_offset_type[MAX_NUM_PARTS];
131 int part_set[MAX_NUM_PARTS];
132
133 #if NUMBOOT > 0
134 int installboot; /* non-zero if we should install a boot program */
135 char *bootbuf; /* pointer to buffer with remainder of boot prog */
136 int bootsize; /* size of remaining boot program */
137 char *xxboot; /* primary boot */
138 char *bootxx; /* secondary boot */
139 char boot0[MAXPATHLEN];
140 char boot1[MAXPATHLEN];
141 #endif
142
143 enum {
144 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
145 } op = UNSPEC;
146
147 int rflag;
148 int disable_write; /* set to disable writing to disk label */
149 int forceflag;
150 u_int32_t slice_start_lba;
151
152 #ifdef DEBUG
153 int debug;
154 #define OPTIONS "BNRWb:def:nrs:w"
155 #else
156 #define OPTIONS "BNRWb:ef:nrs:w"
157 #endif
158
159 int
160 main(int argc, char *argv[])
161 {
162 struct disklabel32 *lp;
163 FILE *t;
164 int ch, f = 0, flag, error = 0;
165 char *name = 0;
166
167 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
168 switch (ch) {
169 #if NUMBOOT > 0
170 case 'B':
171 ++installboot;
172 break;
173 case 'b':
174 xxboot = optarg;
175 break;
176
177 case 'f':
178 forceflag = 1;
179 slice_start_lba = strtoul(optarg, NULL, 0);
180 break;
181 #if NUMBOOT > 1
182 case 's':
183 bootxx = optarg;
184 break;
185 #endif
186 #endif
187 case 'N':
188 if (op != UNSPEC)
189 usage();
190 op = NOWRITE;
191 break;
192 case 'n':
193 disable_write = 1;
194 break;
195 case 'R':
196 if (op != UNSPEC)
197 usage();
198 op = RESTORE;
199 break;
200 case 'W':
201 if (op != UNSPEC)
202 usage();
203 op = WRITEABLE;
204 break;
205 case 'e':
206 if (op != UNSPEC)
207 usage();
208 op = EDIT;
209 break;
210 case 'r':
211 ++rflag;
212 break;
213 case 'w':
214 if (op != UNSPEC)
215 usage();
216 op = WRITE;
217 break;
218 #ifdef DEBUG
219 case 'd':
220 debug++;
221 break;
222 #endif
223 case '?':
224 default:
225 usage();
226 }
227 argc -= optind;
228 argv += optind;
229 #if NUMBOOT > 0
230 if (installboot) {
231 rflag++;
232 if (op == UNSPEC)
233 op = WRITEBOOT;
234 } else {
235 if (op == UNSPEC)
236 op = READ;
237 xxboot = bootxx = 0;
238 }
239 #else
240 if (op == UNSPEC)
241 op = READ;
242 #endif
243 if (argc < 1)
244 usage();
245
246 dkname = argv[0];
247 if (dkname[0] != '/') {
248 sprintf(np, "%s%s", _PATH_DEV, dkname);
249 specname = np;
250 np += strlen(specname) + 1;
251 } else {
252 specname = dkname;
253 }
254 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
255 if (f < 0 && errno == ENOENT && dkname[0] != '/') {
256 sprintf(specname, "%s%s", _PATH_DEV, dkname);
257 np = namebuf + strlen(specname) + 1;
258 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
259 }
260 if (f < 0)
261 err(4, "%s", specname);
262
263 switch(op) {
264
265 case UNSPEC:
266 break;
267
268 case EDIT:
269 if (argc != 1)
270 usage();
271 lp = readlabel(f);
272 error = edit(lp, f);
273 break;
274
275 case NOWRITE:
276 flag = 0;
277 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
278 err(4, "ioctl DIOCWLABEL");
279 break;
280
281 case READ:
282 if (argc != 1)
283 usage();
284 lp = readlabel(f);
285 display(stdout, lp);
286 error = checklabel(lp);
287 if (checkoldboot(f, NULL))
288 warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel");
289 break;
290
291 case RESTORE:
292 #if NUMBOOT > 0
293 if (installboot && argc == 3) {
294 makelabel(argv[2], 0, &lab);
295 argc--;
296
297 /*
298 * We only called makelabel() for its side effect
299 * of setting the bootstrap file names. Discard
300 * all changes to `lab' so that all values in the
301 * final label come from the ASCII label.
302 */
303 bzero((char *)&lab, sizeof(lab));
304 }
305 #endif
306 if (argc != 2)
307 usage();
308 if (!(t = fopen(argv[1], "r")))
309 err(4, "%s", argv[1]);
310 if (!getasciilabel(t, &lab))
311 exit(1);
312 lp = makebootarea(bootarea, &lab, f);
313 *lp = lab;
314 error = writelabel(f, bootarea, lp);
315 break;
316
317 case WRITE:
318 if (argc == 3) {
319 name = argv[2];
320 argc--;
321 }
322 if (argc != 2)
323 usage();
324 makelabel(argv[1], name, &lab);
325 lp = makebootarea(bootarea, &lab, f);
326 *lp = lab;
327 if (checklabel(lp) == 0)
328 error = writelabel(f, bootarea, lp);
329 break;
330
331 case WRITEABLE:
332 flag = 1;
333 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
334 err(4, "ioctl DIOCWLABEL");
335 break;
336
337 #if NUMBOOT > 0
338 case WRITEBOOT:
339 {
340 struct disklabel32 tlab;
341
342 lp = readlabel(f);
343 tlab = *lp;
344 if (argc == 2)
345 makelabel(argv[1], 0, &lab);
346 lp = makebootarea(bootarea, &lab, f);
347 *lp = tlab;
348 if (checklabel(lp) == 0)
349 error = writelabel(f, bootarea, lp);
350 break;
351 }
352 #endif
353 }
354 exit(error);
355 }
356
357 /*
358 * Construct a prototype disklabel from /etc/disktab. As a side
359 * effect, set the names of the primary and secondary boot files
360 * if specified.
361 */
362 void
363 makelabel(const char *type, const char *name, struct disklabel32 *lp)
364 {
365 struct disklabel32 *dp;
366
367 if (strcmp(type, "auto") == 0)
368 dp = getvirginlabel();
369 else
370 dp = getdisklabelfromdisktab(type);
371 if (dp == NULL)
372 errx(1, "%s: unknown disk type", type);
373 *lp = *dp;
374
375 /*
376 * NOTE: boot control files may no longer be specified in disktab.
377 */
378 if (name)
379 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
380 }
381
382 int
383 writelabel(int f, const char *boot, struct disklabel32 *lp)
384 {
385 const char *msg;
386 int flag;
387 int r;
388
389 if (disable_write) {
390 Warning("write to disk label suppressed - label was as follows:");
391 display(stdout, lp);
392 return (0);
393 } else {
394 /* make sure we are not overwriting our boot code */
395 if (checkoldboot(f, boot))
396 errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!");
397 setbootflag(lp);
398 lp->d_magic = DISKMAGIC32;
399 lp->d_magic2 = DISKMAGIC32;
400 lp->d_checksum = 0;
401 lp->d_checksum = dkcksum32(lp);
402 if (rflag) {
403 /*
404 * First set the kernel disk label,
405 * then write a label to the raw disk.
406 * If the SDINFO ioctl fails because it is unimplemented,
407 * keep going; otherwise, the kernel consistency checks
408 * may prevent us from changing the current (in-core)
409 * label.
410 */
411 if (ioctl(f, DIOCSDINFO32, lp) < 0 &&
412 errno != ENODEV && errno != ENOTTY) {
413 l_perror("ioctl DIOCSDINFO32");
414 return (1);
415 }
416 lseek(f, (off_t)0, SEEK_SET);
417
418 /*
419 * write enable label sector before write
420 * (if necessary), disable after writing.
421 */
422 flag = 1;
423 if (ioctl(f, DIOCWLABEL, &flag) < 0)
424 warn("ioctl DIOCWLABEL");
425 msg = fixlabel(f, lp, 1);
426 if (msg) {
427 warn(msg);
428 return (1);
429 }
430 r = write(f, boot, lp->d_bbsize);
431 fixlabel(f, lp, 0);
432 if (r != ((ssize_t)lp->d_bbsize)) {
433 warn("write");
434 return (1);
435 }
436 #if NUMBOOT > 0
437 /*
438 * Output the remainder of the disklabel
439 */
440 if (bootbuf) {
441 fixlabel(f, lp, 1);
442 r = write(f, bootbuf, bootsize);
443 fixlabel(f, lp, 0);
444 if (r != bootsize) {
445 warn("write");
446 return(1);
447 }
448 }
449 #endif
450 flag = 0;
451 ioctl(f, DIOCWLABEL, &flag);
452 } else if (ioctl(f, DIOCWDINFO32, lp) < 0) {
453 l_perror("ioctl DIOCWDINFO32");
454 return (1);
455 }
456 }
457 return (0);
458 }
459
460 void
461 l_perror(const char *s)
462 {
463 switch (errno) {
464
465 case ESRCH:
466 warnx("%s: no disk label on disk;", s);
467 fprintf(stderr, "add \"-r\" to install initial label\n");
468 break;
469
470 case EINVAL:
471 warnx("%s: label magic number or checksum is wrong!", s);
472 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
473 break;
474
475 case EBUSY:
476 warnx("%s: open partition would move or shrink", s);
477 break;
478
479 case EXDEV:
480 warnx("%s: '%c' partition must start at beginning of disk",
481 s, 'a' + RAW_PART);
482 break;
483
484 case ENOATTR:
485 warnx("%s: the disk already has a label of a different type,\n"
486 "probably a 64 bit disklabel. It must be cleaned out "
487 "first.\n", s);
488 break;
489
490 default:
491 warn((char *)NULL);
492 break;
493 }
494 }
495
496 /*
497 * Fetch disklabel for disk.
498 * Use ioctl to get label unless -r flag is given.
499 */
500 struct disklabel32 *
501 readlabel(int f)
502 {
503 const char *msg;
504 struct disklabel32 *lp;
505 int r;
506
507 if (rflag) {
508 r = read(f, bootarea, BBSIZE);
509 if (r < BBSIZE)
510 err(4, "%s", specname);
511 for (lp = (struct disklabel32 *)bootarea;
512 lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp));
513 lp = (struct disklabel32 *)((char *)lp + 16)) {
514 if (lp->d_magic == DISKMAGIC32 &&
515 lp->d_magic2 == DISKMAGIC32)
516 break;
517 }
518 if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) ||
519 lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 ||
520 dkcksum32(lp) != 0) {
521 errx(1, "bad pack magic number (label is damaged, "
522 "or pack is unlabeled)");
523 }
524 if ((msg = fixlabel(f, lp, 0)) != NULL)
525 errx(1, msg);
526 } else {
527 lp = &lab;
528 if (ioctl(f, DIOCGDINFO32, lp) < 0) {
529 l_perror("ioctl DIOCGDINFO32");
530 exit(4);
531 }
532 }
533 return (lp);
534 }
535
536 /*
537 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
538 * Returns a pointer to the disklabel portion of the bootarea.
539 */
540 struct disklabel32 *
541 makebootarea(char *boot, struct disklabel32 *dp, int f)
542 {
543 struct disklabel32 *lp;
544 char *p;
545 int b;
546 #if NUMBOOT > 0
547 char *dkbasename;
548 struct stat sb;
549 #endif
550 #ifdef __i386__
551 char *tmpbuf;
552 unsigned int i, found;
553 #endif
554
555 /* XXX */
556 if (dp->d_secsize == 0) {
557 dp->d_secsize = DEV_BSIZE;
558 dp->d_bbsize = BBSIZE;
559 }
560 lp = (struct disklabel32 *)
561 (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32);
562 bzero((char *)lp, sizeof *lp);
563 #if NUMBOOT > 0
564 /*
565 * If we are not installing a boot program but we are installing a
566 * label on disk then we must read the current bootarea so we don't
567 * clobber the existing boot.
568 */
569 if (!installboot) {
570 if (rflag) {
571 if (read(f, boot, BBSIZE) < BBSIZE)
572 err(4, "%s", specname);
573 bzero((char *)lp, sizeof *lp);
574 }
575 return (lp);
576 }
577 /*
578 * We are installing a boot program. Determine the name(s) and
579 * read them into the appropriate places in the boot area.
580 */
581 if (!xxboot || !bootxx) {
582 dkbasename = np;
583 if ((p = strrchr(dkname, '/')) == NULL)
584 p = dkname;
585 else
586 p++;
587 while (*p && !isdigit(*p))
588 *np++ = *p++;
589 *np++ = '\0';
590
591 if (!xxboot) {
592 sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
593 xxboot = boot0;
594 }
595 #if NUMBOOT > 1
596 if (!bootxx) {
597 sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
598 bootxx = boot1;
599 }
600 #endif
601 }
602 #ifdef DEBUG
603 if (debug)
604 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
605 xxboot, bootxx ? bootxx : "NONE");
606 #endif
607
608 /*
609 * Strange rules:
610 * 1. One-piece bootstrap (hp300/hp800)
611 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
612 * is remembered and written later following the bootarea.
613 * 2. Two-piece bootstraps (vax/i386?/mips?)
614 * up to d_secsize bytes of ``xxboot'' go in first d_secsize
615 * bytes of bootarea, remaining d_bbsize-d_secsize filled
616 * from ``bootxx''.
617 */
618 b = open(xxboot, O_RDONLY);
619 if (b < 0)
620 err(4, "%s", xxboot);
621 #if NUMBOOT > 1
622 #ifdef __i386__
623 /*
624 * XXX Botch alert.
625 * The i386 has the so-called fdisk table embedded into the
626 * primary bootstrap. We take care to not clobber it, but
627 * only if it does already contain some data. (Otherwise,
628 * the xxboot provides a template.)
629 */
630 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
631 err(4, "%s", xxboot);
632 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
633 #endif /* i386 */
634 if (read(b, boot, (int)dp->d_secsize) < 0)
635 err(4, "%s", xxboot);
636 close(b);
637 #ifdef __i386__
638 for (i = DOSPARTOFF, found = 0;
639 !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition);
640 i++)
641 found = tmpbuf[i] != 0;
642 if (found)
643 memcpy((void *)&boot[DOSPARTOFF],
644 (void *)&tmpbuf[DOSPARTOFF],
645 NDOSPART * sizeof(struct dos_partition));
646 free(tmpbuf);
647 #endif /* i386 */
648 b = open(bootxx, O_RDONLY);
649 if (b < 0)
650 err(4, "%s", bootxx);
651 if (fstat(b, &sb) != 0)
652 err(4, "%s", bootxx);
653 if (dp->d_secsize + sb.st_size > dp->d_bbsize)
654 errx(4, "%s too large", bootxx);
655 if (read(b, &boot[dp->d_secsize],
656 (int)(dp->d_bbsize-dp->d_secsize)) < 0)
657 err(4, "%s", bootxx);
658 #else /* !(NUMBOOT > 1) */
659 if (read(b, boot, (int)dp->d_bbsize) < 0)
660 err(4, "%s", xxboot);
661 if (fstat(b, &sb) != 0)
662 err(4, "%s", xxboot);
663 bootsize = (int)sb.st_size - dp->d_bbsize;
664 if (bootsize > 0) {
665 /* XXX assume d_secsize is a power of two */
666 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
667 bootbuf = (char *)malloc((size_t)bootsize);
668 if (bootbuf == 0)
669 err(4, "%s", xxboot);
670 if (read(b, bootbuf, bootsize) < 0) {
671 free(bootbuf);
672 err(4, "%s", xxboot);
673 }
674 }
675 #endif /* NUMBOOT > 1 */
676 close(b);
677 #endif /* NUMBOOT > 0 */
678 /*
679 * Make sure no part of the bootstrap is written in the area
680 * reserved for the label.
681 */
682 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++)
683 if (*p)
684 errx(2, "bootstrap doesn't leave room for disk label");
685 return (lp);
686 }
687
688 void
689 display(FILE *f, const struct disklabel32 *lp)
690 {
691 int i, j;
692 const struct partition32 *pp;
693
694 fprintf(f, "# %s:\n", specname);
695 if (lp->d_type < DKMAXTYPES)
696 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
697 else
698 fprintf(f, "type: %u\n", lp->d_type);
699 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
700 lp->d_typename);
701 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
702 lp->d_packname);
703 fprintf(f, "flags:");
704 fprintf(f, "\n");
705 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
706 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
707 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
708 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
709 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
710 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
711 fprintf(f, "rpm: %u\n", lp->d_rpm);
712 fprintf(f, "interleave: %u\n", lp->d_interleave);
713 fprintf(f, "trackskew: %u\n", lp->d_trackskew);
714 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
715 fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
716 (u_long)lp->d_headswitch);
717 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
718 (u_long)lp->d_trkseek);
719 fprintf(f, "drivedata: ");
720 for (i = NDDATA32 - 1; i >= 0; i--) {
721 if (lp->d_drivedata[i])
722 break;
723 }
724 if (i < 0)
725 i = 0;
726 for (j = 0; j <= i; j++)
727 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
728 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
729 fprintf(f,
730 "# size offset fstype\n");
731 pp = lp->d_partitions;
732 for (i = 0; i < lp->d_npartitions; i++, pp++) {
733 if (pp->p_size) {
734 u_long onemeg = 1024 * 1024 / lp->d_secsize;
735 fprintf(f, " %c: ", 'a' + i);
736
737 fprintf(f, "%10lu ", (u_long)pp->p_size);
738 fprintf(f, "%10lu ", (u_long)pp->p_offset);
739 if (pp->p_fstype < FSMAXTYPES)
740 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
741 else
742 fprintf(f, "%8d", pp->p_fstype);
743
744 fprintf(f, "\t# %11.3fMB", (double)pp->p_size / onemeg);
745 fprintf(f, "\n");
746 }
747 }
748 fflush(f);
749 }
750
751 int
752 edit(struct disklabel32 *lp, int f)
753 {
754 int c, fd;
755 struct disklabel32 label;
756 FILE *fp;
757
758 if ((fd = mkstemp(tmpfil)) == -1 ||
759 (fp = fdopen(fd, "w")) == NULL) {
760 warnx("can't create %s", tmpfil);
761 return (1);
762 }
763 display(fp, lp);
764 fclose(fp);
765 for (;;) {
766 if (!editit())
767 break;
768 fp = fopen(tmpfil, "r");
769 if (fp == NULL) {
770 warnx("can't reopen %s for reading", tmpfil);
771 break;
772 }
773 bzero((char *)&label, sizeof(label));
774 if (getasciilabel(fp, &label)) {
775 *lp = label;
776 if (writelabel(f, bootarea, lp) == 0) {
777 fclose(fp);
778 unlink(tmpfil);
779 return (0);
780 }
781 }
782 fclose(fp);
783 printf("re-edit the label? [y]: "); fflush(stdout);
784 c = getchar();
785 if (c != EOF && c != (int)'\n')
786 while (getchar() != (int)'\n')
787 ;
788 if (c == (int)'n')
789 break;
790 }
791 unlink(tmpfil);
792 return (1);
793 }
794
795 int
796 editit(void)
797 {
798 int pid, xpid;
799 int status, omask;
800 const char *ed;
801
802 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
803 while ((pid = fork()) < 0) {
804 if (errno == EPROCLIM) {
805 warnx("you have too many processes");
806 return(0);
807 }
808 if (errno != EAGAIN) {
809 warn("fork");
810 return(0);
811 }
812 sleep(1);
813 }
814 if (pid == 0) {
815 sigsetmask(omask);
816 setgid(getgid());
817 setuid(getuid());
818 if ((ed = getenv("EDITOR")) == (char *)0)
819 ed = DEFEDITOR;
820 execlp(ed, ed, tmpfil, (char *)0);
821 err(1, "%s", ed);
822 }
823 while ((xpid = wait(&status)) >= 0)
824 if (xpid == pid)
825 break;
826 sigsetmask(omask);
827 return(!status);
828 }
829
830 char *
831 skip(char *cp)
832 {
833
834 while (*cp != '\0' && isspace(*cp))
835 cp++;
836 if (*cp == '\0' || *cp == '#')
837 return (NULL);
838 return (cp);
839 }
840
841 char *
842 word(char *cp)
843 {
844 char c;
845
846 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
847 cp++;
848 if ((c = *cp) != '\0') {
849 *cp++ = '\0';
850 if (c != '#')
851 return (skip(cp));
852 }
853 return (NULL);
854 }
855
856 /*
857 * Read an ascii label in from fd f,
858 * in the same format as that put out by display(),
859 * and fill in lp.
860 */
861 int
862 getasciilabel(FILE *f, struct disklabel32 *lp)
863 {
864 char *cp;
865 const char **cpp;
866 u_int part;
867 char *tp, line[BUFSIZ];
868 u_long v;
869 int lineno = 0, errors = 0;
870 int i;
871 char empty[] = "";
872 char unknown[] = "unknown";
873
874 bzero(&part_set, sizeof(part_set));
875 bzero(&part_size_type, sizeof(part_size_type));
876 bzero(&part_offset_type, sizeof(part_offset_type));
877 lp->d_bbsize = BBSIZE; /* XXX */
878 lp->d_sbsize = SBSIZE; /* XXX */
879 while (fgets(line, sizeof(line) - 1, f)) {
880 lineno++;
881 if ((cp = strchr(line,'\n')) != 0)
882 *cp = '\0';
883 cp = skip(line);
884 if (cp == NULL)
885 continue;
886 tp = strchr(cp, ':');
887 if (tp == NULL) {
888 fprintf(stderr, "line %d: syntax error\n", lineno);
889 errors++;
890 continue;
891 }
892 *tp++ = '\0', tp = skip(tp);
893 if (streq(cp, "type")) {
894 if (tp == NULL)
895 tp = unknown;
896 cpp = dktypenames;
897 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) {
898 if (*cpp && streq(*cpp, tp)) {
899 lp->d_type = cpp - dktypenames;
900 break;
901 }
902 }
903 if (cpp < &dktypenames[DKMAXTYPES])
904 continue;
905 v = strtoul(tp, NULL, 10);
906 if (v >= DKMAXTYPES) {
907 fprintf(stderr, "line %d:%s %lu\n", lineno,
908 "Warning, unknown disk type", v);
909 }
910 lp->d_type = v;
911 continue;
912 }
913 if (streq(cp, "flags")) {
914 for (v = 0; (cp = tp) && *cp != '\0';) {
915 tp = word(cp);
916 if (streq(cp, "removeable"))
917 v |= 0; /* obsolete */
918 else if (streq(cp, "ecc"))
919 v |= 0; /* obsolete */
920 else if (streq(cp, "badsect"))
921 v |= 0; /* obsolete */
922 else {
923 fprintf(stderr,
924 "line %d: %s: bad flag\n",
925 lineno, cp);
926 errors++;
927 }
928 }
929 lp->d_flags = v;
930 continue;
931 }
932 if (streq(cp, "drivedata")) {
933 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) {
934 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
935 tp = word(cp);
936 }
937 continue;
938 }
939 if (sscanf(cp, "%lu partitions", &v) == 1) {
940 if (v == 0 || v > MAXPARTITIONS32) {
941 fprintf(stderr,
942 "line %d: bad # of partitions\n", lineno);
943 lp->d_npartitions = MAXPARTITIONS32;
944 errors++;
945 } else
946 lp->d_npartitions = v;
947 continue;
948 }
949 if (tp == NULL)
950 tp = empty;
951 if (streq(cp, "disk")) {
952 strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
953 continue;
954 }
955 if (streq(cp, "label")) {
956 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
957 continue;
958 }
959 if (streq(cp, "bytes/sector")) {
960 v = strtoul(tp, NULL, 10);
961 if (v == 0 || (v % DEV_BSIZE) != 0) {
962 fprintf(stderr,
963 "line %d: %s: bad sector size\n",
964 lineno, tp);
965 errors++;
966 } else
967 lp->d_secsize = v;
968 continue;
969 }
970 if (streq(cp, "sectors/track")) {
971 v = strtoul(tp, NULL, 10);
972 #if (ULONG_MAX != 0xffffffffUL)
973 if (v == 0 || v > 0xffffffff) {
974 #else
975 if (v == 0) {
976 #endif
977 fprintf(stderr, "line %d: %s: bad %s\n",
978 lineno, tp, cp);
979 errors++;
980 } else
981 lp->d_nsectors = v;
982 continue;
983 }
984 if (streq(cp, "sectors/cylinder")) {
985 v = strtoul(tp, NULL, 10);
986 if (v == 0) {
987 fprintf(stderr, "line %d: %s: bad %s\n",
988 lineno, tp, cp);
989 errors++;
990 } else
991 lp->d_secpercyl = v;
992 continue;
993 }
994 if (streq(cp, "tracks/cylinder")) {
995 v = strtoul(tp, NULL, 10);
996 if (v == 0) {
997 fprintf(stderr, "line %d: %s: bad %s\n",
998 lineno, tp, cp);
999 errors++;
1000 } else
1001 lp->d_ntracks = v;
1002 continue;
1003 }
1004 if (streq(cp, "cylinders")) {
1005 v = strtoul(tp, NULL, 10);
1006 if (v == 0) {
1007 fprintf(stderr, "line %d: %s: bad %s\n",
1008 lineno, tp, cp);
1009 errors++;
1010 } else
1011 lp->d_ncylinders = v;
1012 continue;
1013 }
1014 if (streq(cp, "sectors/unit")) {
1015 v = strtoul(tp, NULL, 10);
1016 if (v == 0) {
1017 fprintf(stderr, "line %d: %s: bad %s\n",
1018 lineno, tp, cp);
1019 errors++;
1020 } else
1021 lp->d_secperunit = v;
1022 continue;
1023 }
1024 if (streq(cp, "rpm")) {
1025 v = strtoul(tp, NULL, 10);
1026 if (v == 0 || v > USHRT_MAX) {
1027 fprintf(stderr, "line %d: %s: bad %s\n",
1028 lineno, tp, cp);
1029 errors++;
1030 } else
1031 lp->d_rpm = v;
1032 continue;
1033 }
1034 if (streq(cp, "interleave")) {
1035 v = strtoul(tp, NULL, 10);
1036 if (v == 0 || v > USHRT_MAX) {
1037 fprintf(stderr, "line %d: %s: bad %s\n",
1038 lineno, tp, cp);
1039 errors++;
1040 } else
1041 lp->d_interleave = v;
1042 continue;
1043 }
1044 if (streq(cp, "trackskew")) {
1045 v = strtoul(tp, NULL, 10);
1046 if (v > USHRT_MAX) {
1047 fprintf(stderr, "line %d: %s: bad %s\n",
1048 lineno, tp, cp);
1049 errors++;
1050 } else
1051 lp->d_trackskew = v;
1052 continue;
1053 }
1054 if (streq(cp, "cylinderskew")) {
1055 v = strtoul(tp, NULL, 10);
1056 if (v > USHRT_MAX) {
1057 fprintf(stderr, "line %d: %s: bad %s\n",
1058 lineno, tp, cp);
1059 errors++;
1060 } else
1061 lp->d_cylskew = v;
1062 continue;
1063 }
1064 if (streq(cp, "headswitch")) {
1065 v = strtoul(tp, NULL, 10);
1066 lp->d_headswitch = v;
1067 continue;
1068 }
1069 if (streq(cp, "track-to-track seek")) {
1070 v = strtoul(tp, NULL, 10);
1071 lp->d_trkseek = v;
1072 continue;
1073 }
1074 /* the ':' was removed above */
1075 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1076 fprintf(stderr,
1077 "line %d: %s: Unknown disklabel field\n", lineno,
1078 cp);
1079 errors++;
1080 continue;
1081 }
1082
1083 /* Process a partition specification line. */
1084 part = *cp - 'a';
1085 if (part >= lp->d_npartitions) {
1086 fprintf(stderr,
1087 "line %d: partition name out of range a-%c: %s\n",
1088 lineno, 'a' + lp->d_npartitions - 1, cp);
1089 errors++;
1090 continue;
1091 }
1092 part_set[part] = 1;
1093
1094 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1095 errors++;
1096 break;
1097 }
1098 }
1099 errors += checklabel(lp);
1100 return (errors == 0);
1101 }
1102
1103 #define NXTNUM(n) do { \
1104 if (tp == NULL) { \
1105 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1106 return (1); \
1107 } else { \
1108 cp = tp, tp = word(cp); \
1109 (n) = strtoul(cp, NULL, 10); \
1110 } \
1111 } while (0)
1112
1113 /* retain 1 character following number */
1114 #define NXTWORD(w,n) do { \
1115 if (tp == NULL) { \
1116 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1117 return (1); \
1118 } else { \
1119 char *tmp; \
1120 cp = tp, tp = word(cp); \
1121 (n) = strtoul(cp, &tmp, 10); \
1122 if (tmp) (w) = *tmp; \
1123 } \
1124 } while (0)
1125
1126 /*
1127 * Read a partition line into partition `part' in the specified disklabel.
1128 * Return 0 on success, 1 on failure.
1129 */
1130 int
1131 getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno)
1132 {
1133 struct partition32 *pp;
1134 char *cp;
1135 const char **cpp;
1136 u_long v;
1137
1138 pp = &lp->d_partitions[part];
1139 cp = NULL;
1140
1141 /*
1142 * size
1143 */
1144 v = 0;
1145 NXTWORD(part_size_type[part],v);
1146 if (v == 0 && part_size_type[part] != '*') {
1147 fprintf(stderr,
1148 "line %d: %s: bad partition size\n", lineno, cp);
1149 return (1);
1150 }
1151 pp->p_size = v;
1152
1153 /*
1154 * offset
1155 */
1156 v = 0;
1157 NXTWORD(part_offset_type[part],v);
1158 if (v == 0 && part_offset_type[part] != '*' &&
1159 part_offset_type[part] != '\0') {
1160 fprintf(stderr,
1161 "line %d: %s: bad partition offset\n", lineno, cp);
1162 return (1);
1163 }
1164 pp->p_offset = v;
1165
1166 /*
1167 * fstype
1168 */
1169 cp = tp;
1170 tp = word(cp);
1171 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1172 if (*cpp && streq(*cpp, cp))
1173 break;
1174 if (*cpp != NULL) {
1175 pp->p_fstype = cpp - fstypenames;
1176 } else {
1177 if (isdigit(*cp))
1178 v = strtoul(cp, NULL, 10);
1179 else
1180 v = FSMAXTYPES;
1181 if (v >= FSMAXTYPES) {
1182 fprintf(stderr,
1183 "line %d: Warning, unknown filesystem type %s\n",
1184 lineno, cp);
1185 v = FS_UNUSED;
1186 }
1187 pp->p_fstype = v;
1188 }
1189
1190 pp->p_fsize = 0;
1191 pp->p_frag = 0;
1192 pp->p_cpg = 0;
1193
1194 cp = tp;
1195 if (tp) {
1196 fprintf(stderr, "line %d: Warning, fragment, block, "
1197 "and bps/cpg fields are no\n"
1198 "longer supported and must be specified "
1199 "via newfs options instead.\n",
1200 lineno);
1201 }
1202 return(0);
1203 }
1204
1205 /*
1206 * Check disklabel for errors and fill in
1207 * derived fields according to supplied values.
1208 */
1209 int
1210 checklabel(struct disklabel32 *lp)
1211 {
1212 struct partition32 *pp;
1213 int i, errors = 0;
1214 char part;
1215 u_long total_size, total_percent, current_offset;
1216 int seen_default_offset;
1217 int hog_part;
1218 int j;
1219 struct partition32 *pp2;
1220
1221 if (lp->d_secsize == 0) {
1222 fprintf(stderr, "sector size 0\n");
1223 return (1);
1224 }
1225 if (lp->d_nsectors == 0) {
1226 fprintf(stderr, "sectors/track 0\n");
1227 return (1);
1228 }
1229 if (lp->d_ntracks == 0) {
1230 fprintf(stderr, "tracks/cylinder 0\n");
1231 return (1);
1232 }
1233 if (lp->d_ncylinders == 0) {
1234 fprintf(stderr, "cylinders/unit 0\n");
1235 errors++;
1236 }
1237 if (lp->d_rpm == 0)
1238 Warning("revolutions/minute 0");
1239 if (lp->d_secpercyl == 0)
1240 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1241 if (lp->d_secperunit == 0)
1242 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1243 if (lp->d_bbsize == 0) {
1244 fprintf(stderr, "boot block size 0\n");
1245 errors++;
1246 } else if (lp->d_bbsize % lp->d_secsize)
1247 Warning("boot block size %% sector-size != 0");
1248 if (lp->d_sbsize == 0) {
1249 fprintf(stderr, "super block size 0\n");
1250 errors++;
1251 } else if (lp->d_sbsize % lp->d_secsize)
1252 Warning("super block size %% sector-size != 0");
1253 if (lp->d_npartitions > MAXPARTITIONS32)
1254 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1255 (u_long)lp->d_npartitions, MAXPARTITIONS32);
1256
1257 /* first allocate space to the partitions, then offsets */
1258 total_size = 0; /* in sectors */
1259 total_percent = 0; /* in percent */
1260 hog_part = -1;
1261 /* find all fixed partitions */
1262 for (i = 0; i < lp->d_npartitions; i++) {
1263 pp = &lp->d_partitions[i];
1264 if (part_set[i]) {
1265
1266 if (part_size_type[i] == '*') {
1267 if (i == RAW_PART) {
1268 pp->p_size = lp->d_secperunit;
1269 } else {
1270 if (part_offset_type[i] != '*') {
1271 if (total_size < pp->p_offset)
1272 total_size = pp->p_offset;
1273 }
1274 if (hog_part != -1)
1275 Warning("Too many '*' partitions (%c and %c)",
1276 hog_part + 'a',i + 'a');
1277 else
1278 hog_part = i;
1279 }
1280 } else {
1281 off_t size;
1282
1283 size = pp->p_size;
1284 switch (part_size_type[i]) {
1285 case '%':
1286 total_percent += size;
1287 break;
1288 case 'k':
1289 case 'K':
1290 size *= 1024ULL;
1291 break;
1292 case 'm':
1293 case 'M':
1294 size *= 1024ULL * 1024ULL;
1295 break;
1296 case 'g':
1297 case 'G':
1298 size *= 1024ULL * 1024ULL * 1024ULL;
1299 break;
1300 case '\0':
1301 break;
1302 default:
1303 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1304 break;
1305 }
1306 /* don't count %'s yet */
1307 if (part_size_type[i] != '%') {
1308 /*
1309 * for all not in sectors, convert to
1310 * sectors
1311 */
1312 if (part_size_type[i] != '\0') {
1313 if (size % lp->d_secsize != 0)
1314 Warning("partition %c not an integer number of sectors",
1315 i + 'a');
1316 size /= lp->d_secsize;
1317 pp->p_size = size;
1318 }
1319 /* else already in sectors */
1320 if (i != RAW_PART)
1321 total_size += size;
1322 }
1323 }
1324 }
1325 }
1326 /* handle % partitions - note %'s don't need to add up to 100! */
1327 if (total_percent != 0) {
1328 long free_space = lp->d_secperunit - total_size;
1329 if (total_percent > 100) {
1330 fprintf(stderr,"total percentage %lu is greater than 100\n",
1331 total_percent);
1332 errors++;
1333 }
1334
1335 if (free_space > 0) {
1336 for (i = 0; i < lp->d_npartitions; i++) {
1337 pp = &lp->d_partitions[i];
1338 if (part_set[i] && part_size_type[i] == '%') {
1339 /* careful of overflows! and integer roundoff */
1340 pp->p_size = ((double)pp->p_size/100) * free_space;
1341 total_size += pp->p_size;
1342
1343 /* FIX we can lose a sector or so due to roundoff per
1344 partition. A more complex algorithm could avoid that */
1345 }
1346 }
1347 } else {
1348 fprintf(stderr,
1349 "%ld sectors available to give to '*' and '%%' partitions\n",
1350 free_space);
1351 errors++;
1352 /* fix? set all % partitions to size 0? */
1353 }
1354 }
1355 /* give anything remaining to the hog partition */
1356 if (hog_part != -1) {
1357 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1358 total_size = lp->d_secperunit;
1359 }
1360
1361 /* Now set the offsets for each partition */
1362 current_offset = 0; /* in sectors */
1363 seen_default_offset = 0;
1364 for (i = 0; i < lp->d_npartitions; i++) {
1365 part = 'a' + i;
1366 pp = &lp->d_partitions[i];
1367 if (part_set[i]) {
1368 if (part_offset_type[i] == '*') {
1369 if (i == RAW_PART) {
1370 pp->p_offset = 0;
1371 } else {
1372 pp->p_offset = current_offset;
1373 seen_default_offset = 1;
1374 }
1375 } else {
1376 /* allow them to be out of order for old-style tables */
1377 if (pp->p_offset < current_offset &&
1378 seen_default_offset && i != RAW_PART &&
1379 pp->p_fstype != FS_VINUM) {
1380 fprintf(stderr,
1381 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1382 (long)pp->p_offset,i+'a',current_offset);
1383 fprintf(stderr,
1384 "Labels with any *'s for offset must be in ascending order by sector\n");
1385 errors++;
1386 } else if (pp->p_offset != current_offset &&
1387 i != RAW_PART && seen_default_offset) {
1388 /*
1389 * this may give unneeded warnings if
1390 * partitions are out-of-order
1391 */
1392 Warning(
1393 "Offset %ld for partition %c doesn't match expected value %ld",
1394 (long)pp->p_offset, i + 'a', current_offset);
1395 }
1396 }
1397 if (i != RAW_PART)
1398 current_offset = pp->p_offset + pp->p_size;
1399 }
1400 }
1401
1402 for (i = 0; i < lp->d_npartitions; i++) {
1403 part = 'a' + i;
1404 pp = &lp->d_partitions[i];
1405 if (pp->p_size == 0 && pp->p_offset != 0)
1406 Warning("partition %c: size 0, but offset %lu",
1407 part, (u_long)pp->p_offset);
1408 #ifdef notdef
1409 if (pp->p_size % lp->d_secpercyl)
1410 Warning("partition %c: size %% cylinder-size != 0",
1411 part);
1412 if (pp->p_offset % lp->d_secpercyl)
1413 Warning("partition %c: offset %% cylinder-size != 0",
1414 part);
1415 #endif
1416 if (pp->p_offset > lp->d_secperunit) {
1417 fprintf(stderr,
1418 "partition %c: offset past end of unit\n", part);
1419 errors++;
1420 }
1421 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1422 fprintf(stderr,
1423 "partition %c: partition extends past end of unit\n",
1424 part);
1425 errors++;
1426 }
1427 if (i == RAW_PART)
1428 {
1429 if (pp->p_fstype != FS_UNUSED)
1430 Warning("partition %c is not marked as unused!",part);
1431 if (pp->p_offset != 0)
1432 Warning("partition %c doesn't start at 0!",part);
1433 if (pp->p_size != lp->d_secperunit)
1434 Warning("partition %c doesn't cover the whole unit!",part);
1435
1436 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1437 (pp->p_size != lp->d_secperunit)) {
1438 Warning("An incorrect partition %c may cause problems for "
1439 "standard system utilities",part);
1440 }
1441 }
1442
1443 /* check for overlaps */
1444 /* this will check for all possible overlaps once and only once */
1445 for (j = 0; j < i; j++) {
1446 pp2 = &lp->d_partitions[j];
1447 if (j != RAW_PART && i != RAW_PART &&
1448 pp->p_fstype != FS_VINUM &&
1449 pp2->p_fstype != FS_VINUM &&
1450 part_set[i] && part_set[j]) {
1451 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1452 (pp2->p_offset + pp2->p_size > pp->p_offset ||
1453 pp2->p_offset >= pp->p_offset)) {
1454 fprintf(stderr,"partitions %c and %c overlap!\n",
1455 j + 'a', i + 'a');
1456 errors++;
1457 }
1458 }
1459 }
1460 }
1461 for (; i < 8 || i < lp->d_npartitions; i++) {
1462 part = 'a' + i;
1463 pp = &lp->d_partitions[i];
1464 if (pp->p_size || pp->p_offset)
1465 Warning("unused partition %c: size %d offset %lu",
1466 'a' + i, pp->p_size, (u_long)pp->p_offset);
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 disklabel32 dlab;
1481
1482 struct disklabel32 *
1483 getvirginlabel(void)
1484 {
1485 struct partinfo info;
1486 struct disklabel32 *dl = &dlab;
1487 char nambuf[BBSIZE];
1488 int f;
1489
1490 if (dkname[0] == '/') {
1491 warnx("\"auto\" requires the usage of a canonical disk name");
1492 return (NULL);
1493 }
1494 snprintf(nambuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1495 if ((f = open(nambuf, O_RDONLY)) == -1) {
1496 warn("cannot open %s", nambuf);
1497 return (NULL);
1498 }
1499
1500 /*
1501 * Check to see if the media is too big for a 32 bit disklabel.
1502 */
1503 if (ioctl(f, DIOCGPART, &info) == 0) {
1504 if (info.media_size >= 0x100000000ULL * 512) {
1505 warnx("The media is too large for a 32 bit disklabel");
1506 return (NULL);
1507 }
1508 }
1509
1510 /*
1511 * Generate a virgin disklabel via ioctl
1512 */
1513 if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) {
1514 l_perror("ioctl DIOCGDVIRGIN32");
1515 close(f);
1516 return(NULL);
1517 }
1518 close(f);
1519 return (dl);
1520 }
1521
1522 struct disklabel32 *
1523 getdisklabelfromdisktab(const char *name)
1524 {
1525 struct disktab *dt;
1526 struct disklabel32 *dl = &dlab;
1527 int i;
1528
1529 if ((dt = getdisktabbyname(name)) == NULL)
1530 return(NULL);
1531 dl->d_magic = DISKMAGIC32;
1532 dl->d_type = dt->d_typeid;
1533 dl->d_subtype = 0;
1534 dl->d_secsize = dt->d_media_blksize;
1535 dl->d_nsectors = dt->d_secpertrack;
1536 dl->d_ntracks = dt->d_nheads;
1537 dl->d_ncylinders = dt->d_ncylinders;
1538 dl->d_secpercyl = dt->d_secpercyl;
1539 dl->d_secperunit = dt->d_media_blocks;
1540 dl->d_rpm = dt->d_rpm;
1541 dl->d_interleave = dt->d_interleave;
1542 dl->d_trackskew = dt->d_trackskew;
1543 dl->d_cylskew = dt->d_cylskew;
1544 dl->d_headswitch = dt->d_headswitch;
1545 dl->d_trkseek = dt->d_trkseek;
1546 dl->d_magic2 = DISKMAGIC32;
1547 dl->d_npartitions = dt->d_npartitions;
1548 dl->d_bbsize = dt->d_bbsize;
1549 dl->d_sbsize = dt->d_sbsize;
1550 for (i = 0; i < dt->d_npartitions; ++i) {
1551 struct partition32 *dlp = &dl->d_partitions[i];
1552 struct dt_partition *dtp = &dt->d_partitions[i];
1553
1554 dlp->p_size = dtp->p_size;
1555 dlp->p_offset = dtp->p_offset;
1556 dlp->p_fsize = dtp->p_fsize;
1557 dlp->p_fstype = dtp->p_fstype;
1558 dlp->p_frag = dtp->p_fsize;
1559 }
1560 return(dl);
1561 }
1562
1563 /*
1564 * If we are installing a boot program that doesn't fit in d_bbsize
1565 * we need to mark those partitions that the boot overflows into.
1566 * This allows newfs to prevent creation of a filesystem where it might
1567 * clobber bootstrap code.
1568 */
1569 void
1570 setbootflag(struct disklabel32 *lp)
1571 {
1572 struct partition32 *pp;
1573 int i, errors = 0;
1574 char part;
1575 u_long boffset;
1576
1577 if (bootbuf == 0)
1578 return;
1579 boffset = bootsize / lp->d_secsize;
1580 for (i = 0; i < lp->d_npartitions; i++) {
1581 part = 'a' + i;
1582 pp = &lp->d_partitions[i];
1583 if (pp->p_size == 0)
1584 continue;
1585 if (boffset <= pp->p_offset) {
1586 if (pp->p_fstype == FS_BOOT)
1587 pp->p_fstype = FS_UNUSED;
1588 } else if (pp->p_fstype != FS_BOOT) {
1589 if (pp->p_fstype != FS_UNUSED) {
1590 fprintf(stderr,
1591 "boot overlaps used partition %c\n",
1592 part);
1593 errors++;
1594 } else {
1595 pp->p_fstype = FS_BOOT;
1596 Warning("boot overlaps partition %c, %s",
1597 part, "marked as FS_BOOT");
1598 }
1599 }
1600 }
1601 if (errors)
1602 errx(4, "cannot install boot program");
1603 }
1604
1605 /*VARARGS1*/
1606 void
1607 Warning(const char *fmt, ...)
1608 {
1609 va_list ap;
1610
1611 fprintf(stderr, "Warning, ");
1612 va_start(ap, fmt);
1613 vfprintf(stderr, fmt, ap);
1614 fprintf(stderr, "\n");
1615 va_end(ap);
1616 }
1617
1618 /*
1619 * Check to see if the bootblocks are in the wrong place. FBsd5 bootblocks
1620 * and earlier DFly bb's are packed against the old disklabel and a new
1621 * disklabel would blow them up. This is a hack that should be removed
1622 * in 2006 sometime (if ever).
1623 */
1624
1625 int
1626 checkoldboot(int f, const char *bootbuffer)
1627 {
1628 char buf[BBSIZE];
1629
1630 if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0)
1631 return(0);
1632 lseek(f, (off_t)0, SEEK_SET);
1633 if (read(f, buf, sizeof(buf)) != sizeof(buf))
1634 return(0);
1635 if (strncmp(buf + 0x402, "BTX", 3) == 0) /* new location */
1636 return(0);
1637 if (strncmp(buf + 0x316, "BTX", 3) == 0) /* old location */
1638 return(1);
1639 return(0);
1640 }
1641
1642 /*
1643 * Traditional 32 bit disklabels actually use absolute sector numbers on
1644 * disk, NOT slice relative sector numbres. The OS hides this from us
1645 * when we use DIOC ioctls to access the label, but newer versions of
1646 * Dragonfly no longer adjusts the disklabel when snooping reads or writes
1647 * so we have to figure it out ourselves.
1648 */
1649 const char *
1650 fixlabel(int f, struct disklabel32 *lp, int writeadj)
1651 {
1652 const char *msg = NULL;
1653 struct partinfo info;
1654 struct partition32 *pp;
1655 u_int64_t start;
1656 u_int64_t end;
1657 u_int64_t offset;
1658 int part;
1659 int rev;
1660 int rev_len = sizeof(rev);
1661
1662 if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) {
1663 errx(1, "Cannot use raw mode on non-DragonFly systems\n");
1664 }
1665 if (rev < 200701) {
1666 warnx("Warning running new disklabel on old DragonFly systems,\n"
1667 "assuming the disk layer will fixup the label.\n");
1668 sleep(3);
1669 return(NULL);
1670 }
1671
1672 pp = &lp->d_partitions[RAW_PART];
1673
1674 if (forceflag) {
1675 info.media_offset = slice_start_lba * lp->d_secsize;
1676 info.media_blocks = pp->p_size;
1677 info.media_blksize = lp->d_secsize;
1678 } else if (ioctl(f, DIOCGPART, &info) < 0) {
1679 msg = "Unable to extract the slice starting LBA, "
1680 "you must use the -f <slice_start_lba> option\n"
1681 "to specify it manually, or perhaps try without "
1682 "using -r and let the kernel deal with it\n";
1683 return(msg);
1684 }
1685
1686 if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
1687 return ("fixlabel: invalid magic");
1688 if (dkcksum32(lp) != 0)
1689 return ("fixlabel: invalid checksum");
1690
1691 /*
1692 * What a mess. For ages old backwards compatibility the disklabel
1693 * on-disk stores absolute offsets instead of slice-relative offsets.
1694 * So fix it up when reading, writing, or snooping.
1695 *
1696 * The in-core label is always slice-relative.
1697 */
1698 if (writeadj) {
1699 /*
1700 * incore -> disk
1701 */
1702 start = 0;
1703 offset = info.media_offset / info.media_blksize;
1704 } else {
1705 /*
1706 * disk -> incore
1707 */
1708 start = info.media_offset / info.media_blksize;
1709 offset = -info.media_offset / info.media_blksize;
1710 }
1711 if (pp->p_offset != start)
1712 return ("fixlabel: raw partition offset != slice offset");
1713 if (pp->p_size != info.media_blocks) {
1714 if (pp->p_size > info.media_blocks)
1715 return ("fixlabel: raw partition size > slice size");
1716 }
1717 end = start + info.media_blocks;
1718 if (start > end)
1719 return ("fixlabel: slice wraps");
1720 if (lp->d_secpercyl <= 0)
1721 return ("fixlabel: d_secpercyl <= 0");
1722 pp -= RAW_PART;
1723 for (part = 0; part < lp->d_npartitions; part++, pp++) {
1724 if (pp->p_offset != 0 || pp->p_size != 0) {
1725 if (pp->p_offset < start
1726 || pp->p_offset + pp->p_size > end
1727 || pp->p_offset + pp->p_size < pp->p_offset) {
1728 /* XXX else silently discard junk. */
1729 bzero(pp, sizeof *pp);
1730 } else {
1731 pp->p_offset += offset;
1732 }
1733 }
1734 }
1735 lp->d_checksum = 0;
1736 lp->d_checksum = dkcksum32(lp);
1737 return (NULL);
1738 }
1739
1740 void
1741 usage(void)
1742 {
1743 #if NUMBOOT > 0
1744 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",
1745 "usage: disklabel [-r] disk",
1746 "\t\t(to read label)",
1747 " disklabel -w [-r] [-n] disk type [ packid ]",
1748 "\t\t(to write label with existing boot program)",
1749 " disklabel -e [-r] [-n] disk",
1750 "\t\t(to edit label)",
1751 " disklabel -R [-r] [-n] disk protofile",
1752 "\t\t(to restore label with existing boot program)",
1753 #if NUMBOOT > 1
1754 " disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1755 "\t\t(to install boot program with existing label)",
1756 " disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1757 "\t\t(to write label and boot program)",
1758 " disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1759 "\t\t(to restore label and boot program)",
1760 #else
1761 " disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1762 "\t\t(to install boot program with existing on-disk label)",
1763 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1764 "\t\t(to write label and install boot program)",
1765 " disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1766 "\t\t(to restore label and install boot program)",
1767 #endif
1768 " disklabel [-NW] disk",
1769 "\t\t(to write disable/enable label)");
1770 #else
1771 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1772 "usage: disklabel [-r] disk", "(to read label)",
1773 " disklabel -w [-r] [-n] disk type [ packid ]",
1774 "\t\t(to write label)",
1775 " disklabel -e [-r] [-n] disk",
1776 "\t\t(to edit label)",
1777 " disklabel -R [-r] [-n] disk protofile",
1778 "\t\t(to restore label)",
1779 " disklabel [-NW] disk",
1780 "\t\t(to write disable/enable label)");
1781 #endif
1782 fprintf(stderr, "%s\n%s\n",
1783 " disklabel [-f slice_start_lba] [options]",
1784 "\t\t(to force using manual offset)");
1785 exit(1);
1786 }
DragonFly BSD