disklabel[32,64] utilities - Change the default disklabel program
[dragonfly.git] / sbin / disklabel32 / disklabel.c
CommitLineData
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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.
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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 $
395137b5 40 * $DragonFly: src/sbin/disklabel/disklabel.c,v 1.28 2008/08/21 21:22:36 thomas Exp $
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41 */
42
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43#include <sys/param.h>
44#include <sys/file.h>
45#include <sys/stat.h>
46#include <sys/wait.h>
47#define DKTYPENAMES
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48#include <sys/disklabel32.h>
49#include <sys/disklabel64.h>
595e3440 50#include <sys/diskslice.h>
6af3b87d 51#include <sys/diskmbr.h>
ba0cc1ab 52#include <sys/dtype.h>
2b961883 53#include <sys/sysctl.h>
e5d03018 54#include <disktab.h>
d736a600 55#include <fstab.h>
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56
57#include <vfs/ufs/dinode.h>
38a690d7 58#include <vfs/ufs/fs.h>
67ad9090 59
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60#include <unistd.h>
61#include <string.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <signal.h>
65#include <stdarg.h>
66#include <ctype.h>
67#include <err.h>
68#include <errno.h>
9ab0684c 69#include <disktab.h>
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70#include "pathnames.h"
71
72/*
73 * Disklabel: read and write disklabels.
74 * The label is usually placed on one of the first sectors of the disk.
75 * Many machines also place a bootstrap in the same area,
76 * in which case the label is embedded in the bootstrap.
77 * The bootstrap source must leave space at the proper offset
78 * for the label on such machines.
79 */
80
81#ifndef BBSIZE
82#define BBSIZE 8192 /* size of boot area, with label */
83#endif
84
85/* FIX! These are too low, but are traditional */
86#define DEFAULT_NEWFS_BLOCK 8192U
87#define DEFAULT_NEWFS_FRAG 1024U
88#define DEFAULT_NEWFS_CPG 16U
89
90#define BIG_NEWFS_BLOCK 16384U
91#define BIG_NEWFS_FRAG 2048U
92#define BIG_NEWFS_CPG 64U
93
984263bc 94#define NUMBOOT 2
984263bc 95
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96void makelabel(const char *, const char *, struct disklabel32 *);
97int writelabel(int, const char *, struct disklabel32 *);
984263bc 98void l_perror(const char *);
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99struct disklabel32 *readlabel(int);
100struct disklabel32 *makebootarea(char *, struct disklabel32 *, int);
101void display(FILE *, const struct disklabel32 *);
102int edit(struct disklabel32 *, int);
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103int editit(void);
104char *skip(char *);
105char *word(char *);
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106int getasciilabel(FILE *, struct disklabel32 *);
107int getasciipartspec(char *, struct disklabel32 *, int, int);
108int checklabel(struct disklabel32 *);
109void setbootflag(struct disklabel32 *);
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110void Warning(const char *, ...) __printflike(1, 2);
111void usage(void);
93217a19 112int checkoldboot(int, const char *);
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113const char *fixlabel(int, struct disklabel32 *, int);
114struct disklabel32 *getvirginlabel(void);
115struct disklabel32 *getdisklabelfromdisktab(const char *name);
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116
117#define DEFEDITOR _PATH_VI
118#define streq(a,b) (strcmp(a,b) == 0)
119
120char *dkname;
121char *specname;
122char tmpfil[] = PATH_TMPFILE;
123
d736a600 124char namebuf[BBSIZE];
2b961883 125struct disklabel32 lab;
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126char bootarea[BBSIZE];
127
128#define MAX_PART ('z')
129#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
130char part_size_type[MAX_NUM_PARTS];
131char part_offset_type[MAX_NUM_PARTS];
132int part_set[MAX_NUM_PARTS];
133
134#if NUMBOOT > 0
135int installboot; /* non-zero if we should install a boot program */
136char *bootbuf; /* pointer to buffer with remainder of boot prog */
137int bootsize; /* size of remaining boot program */
138char *xxboot; /* primary boot */
139char *bootxx; /* secondary boot */
140char boot0[MAXPATHLEN];
141char boot1[MAXPATHLEN];
142#endif
143
144enum {
145 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
146} op = UNSPEC;
147
148int rflag;
149int disable_write; /* set to disable writing to disk label */
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150int forceflag;
151u_int32_t slice_start_lba;
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152
153#ifdef DEBUG
154int debug;
2b961883 155#define OPTIONS "BNRWb:def:nrs:w"
984263bc 156#else
2b961883 157#define OPTIONS "BNRWb:ef:nrs:w"
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158#endif
159
160int
161main(int argc, char *argv[])
162{
2b961883 163 struct disklabel32 *lp;
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164 FILE *t;
165 int ch, f = 0, flag, error = 0;
166 char *name = 0;
167
168 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
169 switch (ch) {
170#if NUMBOOT > 0
171 case 'B':
172 ++installboot;
173 break;
174 case 'b':
175 xxboot = optarg;
176 break;
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177
178 case 'f':
179 forceflag = 1;
180 slice_start_lba = strtoul(optarg, NULL, 0);
181 break;
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182#if NUMBOOT > 1
183 case 's':
184 bootxx = optarg;
185 break;
186#endif
187#endif
188 case 'N':
189 if (op != UNSPEC)
190 usage();
191 op = NOWRITE;
192 break;
193 case 'n':
194 disable_write = 1;
195 break;
196 case 'R':
197 if (op != UNSPEC)
198 usage();
199 op = RESTORE;
200 break;
201 case 'W':
202 if (op != UNSPEC)
203 usage();
204 op = WRITEABLE;
205 break;
206 case 'e':
207 if (op != UNSPEC)
208 usage();
209 op = EDIT;
210 break;
211 case 'r':
212 ++rflag;
213 break;
214 case 'w':
215 if (op != UNSPEC)
216 usage();
217 op = WRITE;
218 break;
219#ifdef DEBUG
220 case 'd':
221 debug++;
222 break;
223#endif
224 case '?':
225 default:
226 usage();
227 }
228 argc -= optind;
229 argv += optind;
230#if NUMBOOT > 0
231 if (installboot) {
232 rflag++;
233 if (op == UNSPEC)
234 op = WRITEBOOT;
235 } else {
236 if (op == UNSPEC)
237 op = READ;
238 xxboot = bootxx = 0;
239 }
240#else
241 if (op == UNSPEC)
242 op = READ;
243#endif
244 if (argc < 1)
245 usage();
246
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247 dkname = getdevpath(argv[0], 0);
248 specname = dkname;
984263bc 249 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
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250 if (f < 0)
251 err(4, "%s", specname);
252
253 switch(op) {
254
255 case UNSPEC:
256 break;
257
258 case EDIT:
259 if (argc != 1)
260 usage();
261 lp = readlabel(f);
262 error = edit(lp, f);
263 break;
264
265 case NOWRITE:
266 flag = 0;
267 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
268 err(4, "ioctl DIOCWLABEL");
269 break;
270
271 case READ:
272 if (argc != 1)
273 usage();
274 lp = readlabel(f);
275 display(stdout, lp);
276 error = checklabel(lp);
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277 if (checkoldboot(f, NULL))
278 warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel");
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279 break;
280
281 case RESTORE:
282#if NUMBOOT > 0
283 if (installboot && argc == 3) {
284 makelabel(argv[2], 0, &lab);
285 argc--;
286
287 /*
288 * We only called makelabel() for its side effect
289 * of setting the bootstrap file names. Discard
290 * all changes to `lab' so that all values in the
291 * final label come from the ASCII label.
292 */
293 bzero((char *)&lab, sizeof(lab));
294 }
295#endif
296 if (argc != 2)
297 usage();
298 if (!(t = fopen(argv[1], "r")))
299 err(4, "%s", argv[1]);
300 if (!getasciilabel(t, &lab))
301 exit(1);
302 lp = makebootarea(bootarea, &lab, f);
303 *lp = lab;
304 error = writelabel(f, bootarea, lp);
305 break;
306
307 case WRITE:
308 if (argc == 3) {
309 name = argv[2];
310 argc--;
311 }
312 if (argc != 2)
313 usage();
314 makelabel(argv[1], name, &lab);
315 lp = makebootarea(bootarea, &lab, f);
316 *lp = lab;
317 if (checklabel(lp) == 0)
318 error = writelabel(f, bootarea, lp);
319 break;
320
321 case WRITEABLE:
322 flag = 1;
323 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
324 err(4, "ioctl DIOCWLABEL");
325 break;
326
327#if NUMBOOT > 0
328 case WRITEBOOT:
329 {
2b961883 330 struct disklabel32 tlab;
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331
332 lp = readlabel(f);
333 tlab = *lp;
334 if (argc == 2)
335 makelabel(argv[1], 0, &lab);
336 lp = makebootarea(bootarea, &lab, f);
337 *lp = tlab;
338 if (checklabel(lp) == 0)
339 error = writelabel(f, bootarea, lp);
340 break;
341 }
342#endif
343 }
344 exit(error);
345}
346
347/*
348 * Construct a prototype disklabel from /etc/disktab. As a side
349 * effect, set the names of the primary and secondary boot files
350 * if specified.
351 */
352void
2b961883 353makelabel(const char *type, const char *name, struct disklabel32 *lp)
984263bc 354{
2b961883 355 struct disklabel32 *dp;
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356
357 if (strcmp(type, "auto") == 0)
358 dp = getvirginlabel();
359 else
e5d03018 360 dp = getdisklabelfromdisktab(type);
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361 if (dp == NULL)
362 errx(1, "%s: unknown disk type", type);
363 *lp = *dp;
e5d03018 364
984263bc 365 /*
e5d03018 366 * NOTE: boot control files may no longer be specified in disktab.
984263bc 367 */
984263bc 368 if (name)
7cee7052 369 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
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370}
371
372int
2b961883 373writelabel(int f, const char *boot, struct disklabel32 *lp)
984263bc 374{
2b961883 375 const char *msg;
984263bc 376 int flag;
1c3c151b 377 int r;
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378
379 if (disable_write) {
0ca0cd25 380 Warning("write to disk label suppressed - label was as follows:");
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381 display(stdout, lp);
382 return (0);
383 } else {
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384 /* make sure we are not overwriting our boot code */
385 if (checkoldboot(f, boot))
386 errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!");
984263bc 387 setbootflag(lp);
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388 lp->d_magic = DISKMAGIC32;
389 lp->d_magic2 = DISKMAGIC32;
984263bc 390 lp->d_checksum = 0;
2b961883 391 lp->d_checksum = dkcksum32(lp);
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392 if (rflag) {
393 /*
394 * First set the kernel disk label,
395 * then write a label to the raw disk.
396 * If the SDINFO ioctl fails because it is unimplemented,
397 * keep going; otherwise, the kernel consistency checks
398 * may prevent us from changing the current (in-core)
399 * label.
400 */
2b961883 401 if (ioctl(f, DIOCSDINFO32, lp) < 0 &&
984263bc 402 errno != ENODEV && errno != ENOTTY) {
0ffe40b3 403 l_perror("ioctl DIOCSDINFO32");
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404 return (1);
405 }
7cee7052 406 lseek(f, (off_t)0, SEEK_SET);
ce19f97e 407
984263bc 408 /*
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409 * write enable label sector before write
410 * (if necessary), disable after writing.
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411 */
412 flag = 1;
413 if (ioctl(f, DIOCWLABEL, &flag) < 0)
414 warn("ioctl DIOCWLABEL");
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415 msg = fixlabel(f, lp, 1);
416 if (msg) {
417 warn(msg);
418 return (1);
419 }
1c3c151b 420 r = write(f, boot, lp->d_bbsize);
2b961883 421 fixlabel(f, lp, 0);
1c3c151b 422 if (r != ((ssize_t)lp->d_bbsize)) {
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423 warn("write");
424 return (1);
425 }
426#if NUMBOOT > 0
427 /*
428 * Output the remainder of the disklabel
429 */
1c3c151b 430 if (bootbuf) {
2b961883 431 fixlabel(f, lp, 1);
1c3c151b 432 r = write(f, bootbuf, bootsize);
2b961883 433 fixlabel(f, lp, 0);
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434 if (r != bootsize) {
435 warn("write");
436 return(1);
437 }
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438 }
439#endif
440 flag = 0;
7cee7052 441 ioctl(f, DIOCWLABEL, &flag);
2b961883 442 } else if (ioctl(f, DIOCWDINFO32, lp) < 0) {
0ffe40b3 443 l_perror("ioctl DIOCWDINFO32");
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444 return (1);
445 }
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446 }
447 return (0);
448}
449
450void
451l_perror(const char *s)
452{
453 switch (errno) {
454
455 case ESRCH:
456 warnx("%s: no disk label on disk;", s);
457 fprintf(stderr, "add \"-r\" to install initial label\n");
458 break;
459
460 case EINVAL:
461 warnx("%s: label magic number or checksum is wrong!", s);
462 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
463 break;
464
465 case EBUSY:
466 warnx("%s: open partition would move or shrink", s);
467 break;
468
469 case EXDEV:
470 warnx("%s: '%c' partition must start at beginning of disk",
471 s, 'a' + RAW_PART);
472 break;
473
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474 case ENOATTR:
475 warnx("%s: the disk already has a label of a different type,\n"
476 "probably a 64 bit disklabel. It must be cleaned out "
477 "first.\n", s);
478 break;
479
984263bc 480 default:
2038fb68 481 warn(NULL);
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482 break;
483 }
484}
485
486/*
487 * Fetch disklabel for disk.
488 * Use ioctl to get label unless -r flag is given.
489 */
2b961883 490struct disklabel32 *
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491readlabel(int f)
492{
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493 const char *msg;
494 struct disklabel32 *lp;
1c3c151b 495 int r;
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496
497 if (rflag) {
1c3c151b 498 r = read(f, bootarea, BBSIZE);
1c3c151b 499 if (r < BBSIZE)
984263bc 500 err(4, "%s", specname);
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501 for (lp = (struct disklabel32 *)bootarea;
502 lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp));
503 lp = (struct disklabel32 *)((char *)lp + 16)) {
504 if (lp->d_magic == DISKMAGIC32 &&
505 lp->d_magic2 == DISKMAGIC32)
984263bc 506 break;
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507 }
508 if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) ||
509 lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 ||
510 dkcksum32(lp) != 0) {
511 errx(1, "bad pack magic number (label is damaged, "
512 "or pack is unlabeled)");
513 }
514 if ((msg = fixlabel(f, lp, 0)) != NULL)
515 errx(1, msg);
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516 } else {
517 lp = &lab;
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518 if (ioctl(f, DIOCGDINFO32, lp) < 0) {
519 l_perror("ioctl DIOCGDINFO32");
520 exit(4);
521 }
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522 }
523 return (lp);
524}
525
526/*
527 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
528 * Returns a pointer to the disklabel portion of the bootarea.
529 */
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530struct disklabel32 *
531makebootarea(char *boot, struct disklabel32 *dp, int f)
984263bc 532{
2b961883 533 struct disklabel32 *lp;
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534 char *p;
535 int b;
536#if NUMBOOT > 0
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537 struct stat sb;
538#endif
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539#ifdef __i386__
540 char *tmpbuf;
93217a19 541 unsigned int i, found;
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542#endif
543
544 /* XXX */
545 if (dp->d_secsize == 0) {
546 dp->d_secsize = DEV_BSIZE;
547 dp->d_bbsize = BBSIZE;
548 }
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549 lp = (struct disklabel32 *)
550 (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32);
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551 bzero((char *)lp, sizeof *lp);
552#if NUMBOOT > 0
553 /*
554 * If we are not installing a boot program but we are installing a
555 * label on disk then we must read the current bootarea so we don't
556 * clobber the existing boot.
557 */
558 if (!installboot) {
559 if (rflag) {
560 if (read(f, boot, BBSIZE) < BBSIZE)
561 err(4, "%s", specname);
562 bzero((char *)lp, sizeof *lp);
563 }
564 return (lp);
565 }
566 /*
567 * We are installing a boot program. Determine the name(s) and
568 * read them into the appropriate places in the boot area.
569 */
570 if (!xxboot || !bootxx) {
984263bc 571 if (!xxboot) {
7cee7052 572 sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
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573 xxboot = boot0;
574 }
575#if NUMBOOT > 1
576 if (!bootxx) {
7cee7052 577 sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
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578 bootxx = boot1;
579 }
580#endif
581 }
582#ifdef DEBUG
583 if (debug)
584 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
585 xxboot, bootxx ? bootxx : "NONE");
586#endif
587
588 /*
589 * Strange rules:
590 * 1. One-piece bootstrap (hp300/hp800)
591 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
592 * is remembered and written later following the bootarea.
593 * 2. Two-piece bootstraps (vax/i386?/mips?)
594 * up to d_secsize bytes of ``xxboot'' go in first d_secsize
595 * bytes of bootarea, remaining d_bbsize-d_secsize filled
596 * from ``bootxx''.
597 */
598 b = open(xxboot, O_RDONLY);
599 if (b < 0)
600 err(4, "%s", xxboot);
601#if NUMBOOT > 1
602#ifdef __i386__
603 /*
604 * XXX Botch alert.
605 * The i386 has the so-called fdisk table embedded into the
606 * primary bootstrap. We take care to not clobber it, but
607 * only if it does already contain some data. (Otherwise,
608 * the xxboot provides a template.)
609 */
610 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
611 err(4, "%s", xxboot);
612 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
613#endif /* i386 */
614 if (read(b, boot, (int)dp->d_secsize) < 0)
615 err(4, "%s", xxboot);
7cee7052 616 close(b);
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617#ifdef __i386__
618 for (i = DOSPARTOFF, found = 0;
619 !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition);
620 i++)
621 found = tmpbuf[i] != 0;
622 if (found)
623 memcpy((void *)&boot[DOSPARTOFF],
624 (void *)&tmpbuf[DOSPARTOFF],
625 NDOSPART * sizeof(struct dos_partition));
626 free(tmpbuf);
627#endif /* i386 */
628 b = open(bootxx, O_RDONLY);
629 if (b < 0)
630 err(4, "%s", bootxx);
631 if (fstat(b, &sb) != 0)
632 err(4, "%s", bootxx);
633 if (dp->d_secsize + sb.st_size > dp->d_bbsize)
634 errx(4, "%s too large", bootxx);
635 if (read(b, &boot[dp->d_secsize],
636 (int)(dp->d_bbsize-dp->d_secsize)) < 0)
637 err(4, "%s", bootxx);
638#else /* !(NUMBOOT > 1) */
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639 if (read(b, boot, (int)dp->d_bbsize) < 0)
640 err(4, "%s", xxboot);
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641 if (fstat(b, &sb) != 0)
642 err(4, "%s", xxboot);
643 bootsize = (int)sb.st_size - dp->d_bbsize;
644 if (bootsize > 0) {
645 /* XXX assume d_secsize is a power of two */
646 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
647 bootbuf = (char *)malloc((size_t)bootsize);
648 if (bootbuf == 0)
649 err(4, "%s", xxboot);
650 if (read(b, bootbuf, bootsize) < 0) {
651 free(bootbuf);
652 err(4, "%s", xxboot);
653 }
654 }
655#endif /* NUMBOOT > 1 */
7cee7052 656 close(b);
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657#endif /* NUMBOOT > 0 */
658 /*
659 * Make sure no part of the bootstrap is written in the area
660 * reserved for the label.
661 */
2b961883 662 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++)
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663 if (*p)
664 errx(2, "bootstrap doesn't leave room for disk label");
665 return (lp);
666}
667
668void
2b961883 669display(FILE *f, const struct disklabel32 *lp)
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670{
671 int i, j;
2b961883 672 const struct partition32 *pp;
984263bc
MD
673
674 fprintf(f, "# %s:\n", specname);
675 if (lp->d_type < DKMAXTYPES)
676 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
677 else
678 fprintf(f, "type: %u\n", lp->d_type);
679 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
680 lp->d_typename);
681 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
682 lp->d_packname);
683 fprintf(f, "flags:");
984263bc
MD
684 fprintf(f, "\n");
685 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
686 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
687 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
688 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
689 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
690 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
691 fprintf(f, "rpm: %u\n", lp->d_rpm);
692 fprintf(f, "interleave: %u\n", lp->d_interleave);
693 fprintf(f, "trackskew: %u\n", lp->d_trackskew);
694 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
695 fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
696 (u_long)lp->d_headswitch);
697 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
698 (u_long)lp->d_trkseek);
699 fprintf(f, "drivedata: ");
2b961883 700 for (i = NDDATA32 - 1; i >= 0; i--) {
984263bc
MD
701 if (lp->d_drivedata[i])
702 break;
cc1ce052 703 }
984263bc
MD
704 if (i < 0)
705 i = 0;
706 for (j = 0; j <= i; j++)
707 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
708 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
709 fprintf(f,
cbefee19 710 "# size offset fstype\n");
984263bc
MD
711 pp = lp->d_partitions;
712 for (i = 0; i < lp->d_npartitions; i++, pp++) {
713 if (pp->p_size) {
cc1ce052
MD
714 u_long onemeg = 1024 * 1024 / lp->d_secsize;
715 fprintf(f, " %c: ", 'a' + i);
716
717 fprintf(f, "%10lu ", (u_long)pp->p_size);
718 fprintf(f, "%10lu ", (u_long)pp->p_offset);
984263bc
MD
719 if (pp->p_fstype < FSMAXTYPES)
720 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
721 else
722 fprintf(f, "%8d", pp->p_fstype);
984263bc 723
58635e07 724 fprintf(f, "\t# %11.3fMB", (double)pp->p_size / onemeg);
cc1ce052 725 fprintf(f, "\n");
984263bc
MD
726 }
727 }
728 fflush(f);
729}
730
731int
2b961883 732edit(struct disklabel32 *lp, int f)
984263bc
MD
733{
734 int c, fd;
2b961883 735 struct disklabel32 label;
984263bc
MD
736 FILE *fp;
737
738 if ((fd = mkstemp(tmpfil)) == -1 ||
739 (fp = fdopen(fd, "w")) == NULL) {
740 warnx("can't create %s", tmpfil);
741 return (1);
742 }
743 display(fp, lp);
744 fclose(fp);
745 for (;;) {
746 if (!editit())
747 break;
748 fp = fopen(tmpfil, "r");
749 if (fp == NULL) {
750 warnx("can't reopen %s for reading", tmpfil);
751 break;
752 }
753 bzero((char *)&label, sizeof(label));
754 if (getasciilabel(fp, &label)) {
755 *lp = label;
756 if (writelabel(f, bootarea, lp) == 0) {
757 fclose(fp);
7cee7052 758 unlink(tmpfil);
984263bc
MD
759 return (0);
760 }
761 }
762 fclose(fp);
763 printf("re-edit the label? [y]: "); fflush(stdout);
764 c = getchar();
765 if (c != EOF && c != (int)'\n')
766 while (getchar() != (int)'\n')
767 ;
768 if (c == (int)'n')
769 break;
770 }
7cee7052 771 unlink(tmpfil);
984263bc
MD
772 return (1);
773}
774
775int
776editit(void)
777{
778 int pid, xpid;
93217a19
PA
779 int status, omask;
780 const char *ed;
984263bc
MD
781
782 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
783 while ((pid = fork()) < 0) {
784 if (errno == EPROCLIM) {
785 warnx("you have too many processes");
786 return(0);
787 }
788 if (errno != EAGAIN) {
789 warn("fork");
790 return(0);
791 }
792 sleep(1);
793 }
794 if (pid == 0) {
795 sigsetmask(omask);
796 setgid(getgid());
797 setuid(getuid());
60233e58 798 if ((ed = getenv("EDITOR")) == NULL)
984263bc 799 ed = DEFEDITOR;
60233e58 800 execlp(ed, ed, tmpfil, NULL);
984263bc
MD
801 err(1, "%s", ed);
802 }
93217a19 803 while ((xpid = wait(&status)) >= 0)
984263bc
MD
804 if (xpid == pid)
805 break;
806 sigsetmask(omask);
93217a19 807 return(!status);
984263bc
MD
808}
809
810char *
811skip(char *cp)
812{
813
814 while (*cp != '\0' && isspace(*cp))
815 cp++;
816 if (*cp == '\0' || *cp == '#')
817 return (NULL);
818 return (cp);
819}
820
821char *
822word(char *cp)
823{
824 char c;
825
826 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
827 cp++;
828 if ((c = *cp) != '\0') {
829 *cp++ = '\0';
830 if (c != '#')
831 return (skip(cp));
832 }
833 return (NULL);
834}
835
836/*
837 * Read an ascii label in from fd f,
838 * in the same format as that put out by display(),
839 * and fill in lp.
840 */
841int
2b961883 842getasciilabel(FILE *f, struct disklabel32 *lp)
984263bc
MD
843{
844 char *cp;
89671a80 845 const char **cpp;
984263bc
MD
846 u_int part;
847 char *tp, line[BUFSIZ];
848 u_long v;
849 int lineno = 0, errors = 0;
850 int i;
93217a19
PA
851 char empty[] = "";
852 char unknown[] = "unknown";
984263bc
MD
853
854 bzero(&part_set, sizeof(part_set));
855 bzero(&part_size_type, sizeof(part_size_type));
856 bzero(&part_offset_type, sizeof(part_offset_type));
857 lp->d_bbsize = BBSIZE; /* XXX */
858 lp->d_sbsize = SBSIZE; /* XXX */
859 while (fgets(line, sizeof(line) - 1, f)) {
860 lineno++;
17b61719 861 if ((cp = strchr(line,'\n')) != 0)
984263bc
MD
862 *cp = '\0';
863 cp = skip(line);
864 if (cp == NULL)
865 continue;
17b61719 866 tp = strchr(cp, ':');
984263bc
MD
867 if (tp == NULL) {
868 fprintf(stderr, "line %d: syntax error\n", lineno);
869 errors++;
870 continue;
871 }
872 *tp++ = '\0', tp = skip(tp);
873 if (streq(cp, "type")) {
874 if (tp == NULL)
93217a19 875 tp = unknown;
984263bc 876 cpp = dktypenames;
cc1ce052 877 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) {
a8de4644 878 if (*cpp && strcasecmp(*cpp, tp) == 0) {
984263bc
MD
879 lp->d_type = cpp - dktypenames;
880 break;
881 }
cc1ce052 882 }
984263bc
MD
883 if (cpp < &dktypenames[DKMAXTYPES])
884 continue;
885 v = strtoul(tp, NULL, 10);
cc1ce052 886 if (v >= DKMAXTYPES) {
984263bc
MD
887 fprintf(stderr, "line %d:%s %lu\n", lineno,
888 "Warning, unknown disk type", v);
cc1ce052 889 }
984263bc
MD
890 lp->d_type = v;
891 continue;
892 }
893 if (streq(cp, "flags")) {
894 for (v = 0; (cp = tp) && *cp != '\0';) {
895 tp = word(cp);
896 if (streq(cp, "removeable"))
656d6a69 897 v |= 0; /* obsolete */
984263bc 898 else if (streq(cp, "ecc"))
656d6a69 899 v |= 0; /* obsolete */
984263bc 900 else if (streq(cp, "badsect"))
656d6a69 901 v |= 0; /* obsolete */
984263bc
MD
902 else {
903 fprintf(stderr,
904 "line %d: %s: bad flag\n",
905 lineno, cp);
906 errors++;
907 }
908 }
909 lp->d_flags = v;
910 continue;
911 }
912 if (streq(cp, "drivedata")) {
2b961883 913 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) {
984263bc
MD
914 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
915 tp = word(cp);
916 }
917 continue;
918 }
919 if (sscanf(cp, "%lu partitions", &v) == 1) {
2b961883 920 if (v == 0 || v > MAXPARTITIONS32) {
984263bc
MD
921 fprintf(stderr,
922 "line %d: bad # of partitions\n", lineno);
2b961883 923 lp->d_npartitions = MAXPARTITIONS32;
984263bc
MD
924 errors++;
925 } else
926 lp->d_npartitions = v;
927 continue;
928 }
929 if (tp == NULL)
93217a19 930 tp = empty;
984263bc
MD
931 if (streq(cp, "disk")) {
932 strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
933 continue;
934 }
935 if (streq(cp, "label")) {
936 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
937 continue;
938 }
939 if (streq(cp, "bytes/sector")) {
940 v = strtoul(tp, NULL, 10);
941 if (v == 0 || (v % DEV_BSIZE) != 0) {
942 fprintf(stderr,
943 "line %d: %s: bad sector size\n",
944 lineno, tp);
945 errors++;
946 } else
947 lp->d_secsize = v;
948 continue;
949 }
950 if (streq(cp, "sectors/track")) {
951 v = strtoul(tp, NULL, 10);
952#if (ULONG_MAX != 0xffffffffUL)
953 if (v == 0 || v > 0xffffffff) {
954#else
955 if (v == 0) {
956#endif
957 fprintf(stderr, "line %d: %s: bad %s\n",
958 lineno, tp, cp);
959 errors++;
960 } else
961 lp->d_nsectors = v;
962 continue;
963 }
964 if (streq(cp, "sectors/cylinder")) {
965 v = strtoul(tp, NULL, 10);
966 if (v == 0) {
967 fprintf(stderr, "line %d: %s: bad %s\n",
968 lineno, tp, cp);
969 errors++;
970 } else
971 lp->d_secpercyl = v;
972 continue;
973 }
974 if (streq(cp, "tracks/cylinder")) {
975 v = strtoul(tp, NULL, 10);
976 if (v == 0) {
977 fprintf(stderr, "line %d: %s: bad %s\n",
978 lineno, tp, cp);
979 errors++;
980 } else
981 lp->d_ntracks = v;
982 continue;
983 }
984 if (streq(cp, "cylinders")) {
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_ncylinders = v;
992 continue;
993 }
994 if (streq(cp, "sectors/unit")) {
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_secperunit = v;
1002 continue;
1003 }
1004 if (streq(cp, "rpm")) {
1005 v = strtoul(tp, NULL, 10);
1006 if (v == 0 || v > USHRT_MAX) {
1007 fprintf(stderr, "line %d: %s: bad %s\n",
1008 lineno, tp, cp);
1009 errors++;
1010 } else
1011 lp->d_rpm = v;
1012 continue;
1013 }
1014 if (streq(cp, "interleave")) {
1015 v = strtoul(tp, NULL, 10);
1016 if (v == 0 || v > USHRT_MAX) {
1017 fprintf(stderr, "line %d: %s: bad %s\n",
1018 lineno, tp, cp);
1019 errors++;
1020 } else
1021 lp->d_interleave = v;
1022 continue;
1023 }
1024 if (streq(cp, "trackskew")) {
1025 v = strtoul(tp, NULL, 10);
1026 if (v > USHRT_MAX) {
1027 fprintf(stderr, "line %d: %s: bad %s\n",
1028 lineno, tp, cp);
1029 errors++;
1030 } else
1031 lp->d_trackskew = v;
1032 continue;
1033 }
1034 if (streq(cp, "cylinderskew")) {
1035 v = strtoul(tp, NULL, 10);
1036 if (v > USHRT_MAX) {
1037 fprintf(stderr, "line %d: %s: bad %s\n",
1038 lineno, tp, cp);
1039 errors++;
1040 } else
1041 lp->d_cylskew = v;
1042 continue;
1043 }
1044 if (streq(cp, "headswitch")) {
1045 v = strtoul(tp, NULL, 10);
1046 lp->d_headswitch = v;
1047 continue;
1048 }
1049 if (streq(cp, "track-to-track seek")) {
1050 v = strtoul(tp, NULL, 10);
1051 lp->d_trkseek = v;
1052 continue;
1053 }
1054 /* the ':' was removed above */
1055 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1056 fprintf(stderr,
1057 "line %d: %s: Unknown disklabel field\n", lineno,
1058 cp);
1059 errors++;
1060 continue;
1061 }
1062
1063 /* Process a partition specification line. */
1064 part = *cp - 'a';
1065 if (part >= lp->d_npartitions) {
1066 fprintf(stderr,
1067 "line %d: partition name out of range a-%c: %s\n",
1068 lineno, 'a' + lp->d_npartitions - 1, cp);
1069 errors++;
1070 continue;
1071 }
1072 part_set[part] = 1;
1073
1074 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1075 errors++;
1076 break;
1077 }
1078 }
1079 errors += checklabel(lp);
1080 return (errors == 0);
1081}
1082
1083#define NXTNUM(n) do { \
1084 if (tp == NULL) { \
1085 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1086 return (1); \
1087 } else { \
1088 cp = tp, tp = word(cp); \
1089 (n) = strtoul(cp, NULL, 10); \
1090 } \
1091} while (0)
1092
1093/* retain 1 character following number */
1094#define NXTWORD(w,n) do { \
1095 if (tp == NULL) { \
1096 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1097 return (1); \
1098 } else { \
1099 char *tmp; \
1100 cp = tp, tp = word(cp); \
1101 (n) = strtoul(cp, &tmp, 10); \
1102 if (tmp) (w) = *tmp; \
1103 } \
1104} while (0)
1105
1106/*
1107 * Read a partition line into partition `part' in the specified disklabel.
1108 * Return 0 on success, 1 on failure.
1109 */
1110int
2b961883 1111getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno)
984263bc 1112{
2b961883 1113 struct partition32 *pp;
984263bc 1114 char *cp;
4e7535c7 1115 const char **cpp;
984263bc
MD
1116 u_long v;
1117
1118 pp = &lp->d_partitions[part];
1119 cp = NULL;
1120
cc1ce052
MD
1121 /*
1122 * size
1123 */
984263bc
MD
1124 v = 0;
1125 NXTWORD(part_size_type[part],v);
1126 if (v == 0 && part_size_type[part] != '*') {
1127 fprintf(stderr,
1128 "line %d: %s: bad partition size\n", lineno, cp);
1129 return (1);
1130 }
1131 pp->p_size = v;
1132
cc1ce052
MD
1133 /*
1134 * offset
1135 */
984263bc
MD
1136 v = 0;
1137 NXTWORD(part_offset_type[part],v);
1138 if (v == 0 && part_offset_type[part] != '*' &&
1139 part_offset_type[part] != '\0') {
1140 fprintf(stderr,
1141 "line %d: %s: bad partition offset\n", lineno, cp);
1142 return (1);
1143 }
1144 pp->p_offset = v;
cc1ce052
MD
1145
1146 /*
1147 * fstype
1148 */
37b93035
NT
1149 if (tp == NULL) {
1150 fprintf(stderr,
1151 "line %d: no filesystem type was specified\n", lineno);
1152 return(1);
1153 }
cc1ce052
MD
1154 cp = tp;
1155 tp = word(cp);
a8de4644
MD
1156 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
1157 if (*cpp && strcasecmp(*cpp, cp) == 0)
984263bc 1158 break;
a8de4644 1159 }
984263bc
MD
1160 if (*cpp != NULL) {
1161 pp->p_fstype = cpp - fstypenames;
1162 } else {
1163 if (isdigit(*cp))
1164 v = strtoul(cp, NULL, 10);
1165 else
1166 v = FSMAXTYPES;
1167 if (v >= FSMAXTYPES) {
1168 fprintf(stderr,
1169 "line %d: Warning, unknown filesystem type %s\n",
1170 lineno, cp);
1171 v = FS_UNUSED;
1172 }
1173 pp->p_fstype = v;
1174 }
1175
cc1ce052
MD
1176 pp->p_fsize = 0;
1177 pp->p_frag = 0;
1178 pp->p_cpg = 0;
1179
1180 cp = tp;
1181 if (tp) {
1182 fprintf(stderr, "line %d: Warning, fragment, block, "
1183 "and bps/cpg fields are no\n"
1184 "longer supported and must be specified "
1185 "via newfs options instead.\n",
1186 lineno);
984263bc 1187 }
cc1ce052 1188 return(0);
984263bc
MD
1189}
1190
1191/*
1192 * Check disklabel for errors and fill in
1193 * derived fields according to supplied values.
1194 */
1195int
2b961883 1196checklabel(struct disklabel32 *lp)
984263bc 1197{
2b961883 1198 struct partition32 *pp;
984263bc
MD
1199 int i, errors = 0;
1200 char part;
cd88939f
SW
1201 u_long base_offset, needed, total_size, total_percent, current_offset;
1202 long free_space;
984263bc
MD
1203 int seen_default_offset;
1204 int hog_part;
1205 int j;
2b961883 1206 struct partition32 *pp2;
984263bc
MD
1207
1208 if (lp->d_secsize == 0) {
1209 fprintf(stderr, "sector size 0\n");
1210 return (1);
1211 }
1212 if (lp->d_nsectors == 0) {
1213 fprintf(stderr, "sectors/track 0\n");
1214 return (1);
1215 }
1216 if (lp->d_ntracks == 0) {
1217 fprintf(stderr, "tracks/cylinder 0\n");
1218 return (1);
1219 }
1220 if (lp->d_ncylinders == 0) {
1221 fprintf(stderr, "cylinders/unit 0\n");
1222 errors++;
1223 }
1224 if (lp->d_rpm == 0)
1225 Warning("revolutions/minute 0");
1226 if (lp->d_secpercyl == 0)
1227 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1228 if (lp->d_secperunit == 0)
1229 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1230 if (lp->d_bbsize == 0) {
1231 fprintf(stderr, "boot block size 0\n");
1232 errors++;
1233 } else if (lp->d_bbsize % lp->d_secsize)
1234 Warning("boot block size %% sector-size != 0");
1235 if (lp->d_sbsize == 0) {
1236 fprintf(stderr, "super block size 0\n");
1237 errors++;
1238 } else if (lp->d_sbsize % lp->d_secsize)
1239 Warning("super block size %% sector-size != 0");
2b961883 1240 if (lp->d_npartitions > MAXPARTITIONS32)
984263bc 1241 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
2b961883 1242 (u_long)lp->d_npartitions, MAXPARTITIONS32);
984263bc
MD
1243
1244 /* first allocate space to the partitions, then offsets */
1245 total_size = 0; /* in sectors */
1246 total_percent = 0; /* in percent */
1247 hog_part = -1;
1248 /* find all fixed partitions */
1249 for (i = 0; i < lp->d_npartitions; i++) {
1250 pp = &lp->d_partitions[i];
1251 if (part_set[i]) {
b00e432b 1252
984263bc
MD
1253 if (part_size_type[i] == '*') {
1254 if (i == RAW_PART) {
1255 pp->p_size = lp->d_secperunit;
1256 } else {
b00e432b
MD
1257 if (part_offset_type[i] != '*') {
1258 if (total_size < pp->p_offset)
1259 total_size = pp->p_offset;
1260 }
984263bc
MD
1261 if (hog_part != -1)
1262 Warning("Too many '*' partitions (%c and %c)",
1263 hog_part + 'a',i + 'a');
1264 else
1265 hog_part = i;
1266 }
1267 } else {
1268 off_t size;
1269
1270 size = pp->p_size;
1271 switch (part_size_type[i]) {
1272 case '%':
1273 total_percent += size;
1274 break;
1275 case 'k':
1276 case 'K':
1277 size *= 1024ULL;
1278 break;
1279 case 'm':
1280 case 'M':
1281 size *= 1024ULL * 1024ULL;
1282 break;
1283 case 'g':
1284 case 'G':
1285 size *= 1024ULL * 1024ULL * 1024ULL;
1286 break;
1287 case '\0':
1288 break;
1289 default:
1290 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1291 break;
1292 }
1293 /* don't count %'s yet */
1294 if (part_size_type[i] != '%') {
1295 /*
1296 * for all not in sectors, convert to
1297 * sectors
1298 */
1299 if (part_size_type[i] != '\0') {
1300 if (size % lp->d_secsize != 0)
1301 Warning("partition %c not an integer number of sectors",
1302 i + 'a');
1303 size /= lp->d_secsize;
1304 pp->p_size = size;
1305 }
1306 /* else already in sectors */
1307 if (i != RAW_PART)
1308 total_size += size;
1309 }
1310 }
1311 }
1312 }
cd88939f
SW
1313
1314 /* Find out the total free space, excluding the boot block area. */
1315 base_offset = BBSIZE / lp->d_secsize;
1316 free_space = 0;
1317 for (i = 0; i < lp->d_npartitions; i++) {
1318 pp = &lp->d_partitions[i];
1319 if (!part_set[i] || i == RAW_PART ||
1320 part_size_type[i] == '%' || part_size_type[i] == '*')
1321 continue;
1322 if (pp->p_offset > base_offset)
1323 free_space += pp->p_offset - base_offset;
1324 if (pp->p_offset + pp->p_size > base_offset)
1325 base_offset = pp->p_offset + pp->p_size;
1326 }
1327 if (base_offset < lp->d_secperunit)
1328 free_space += lp->d_secperunit - base_offset;
1329
984263bc
MD
1330 /* handle % partitions - note %'s don't need to add up to 100! */
1331 if (total_percent != 0) {
984263bc
MD
1332 if (total_percent > 100) {
1333 fprintf(stderr,"total percentage %lu is greater than 100\n",
1334 total_percent);
1335 errors++;
1336 }
1337
1338 if (free_space > 0) {
1339 for (i = 0; i < lp->d_npartitions; i++) {
1340 pp = &lp->d_partitions[i];
1341 if (part_set[i] && part_size_type[i] == '%') {
1342 /* careful of overflows! and integer roundoff */
1343 pp->p_size = ((double)pp->p_size/100) * free_space;
1344 total_size += pp->p_size;
1345
1346 /* FIX we can lose a sector or so due to roundoff per
1347 partition. A more complex algorithm could avoid that */
1348 }
1349 }
1350 } else {
1351 fprintf(stderr,
1352 "%ld sectors available to give to '*' and '%%' partitions\n",
1353 free_space);
1354 errors++;
1355 /* fix? set all % partitions to size 0? */
1356 }
1357 }
1358 /* give anything remaining to the hog partition */
1359 if (hog_part != -1) {
cd88939f
SW
1360 /*
1361 * Find the range of offsets usable by '*' partitions around
1362 * the hog partition and how much space they need.
1363 */
1364 needed = 0;
1365 base_offset = BBSIZE / lp->d_secsize;
1366 for (i = hog_part - 1; i >= 0; i--) {
1367 pp = &lp->d_partitions[i];
1368 if (!part_set[i] || i == RAW_PART)
1369 continue;
1370 if (part_offset_type[i] == '*') {
1371 needed += pp->p_size;
1372 continue;
1373 }
1374 base_offset = pp->p_offset + pp->p_size;
1375 break;
1376 }
1377 current_offset = lp->d_secperunit;
1378 for (i = lp->d_npartitions - 1; i > hog_part; i--) {
1379 pp = &lp->d_partitions[i];
1380 if (!part_set[i] || i == RAW_PART)
1381 continue;
1382 if (part_offset_type[i] == '*') {
1383 needed += pp->p_size;
1384 continue;
1385 }
1386 current_offset = pp->p_offset;
1387 }
1388
1389 if (current_offset - base_offset <= needed) {
1390 fprintf(stderr, "Cannot find space for partition %c\n",
1391 hog_part + 'a');
1392 fprintf(stderr,
1393 "Need more than %lu sectors between %lu and %lu\n",
1394 needed, base_offset, current_offset);
1395 errors++;
1396 lp->d_partitions[hog_part].p_size = 0;
1397 } else {
1398 lp->d_partitions[hog_part].p_size = current_offset -
1399 base_offset - needed;
1400 total_size += lp->d_partitions[hog_part].p_size;
1401 }
984263bc
MD
1402 }
1403
1404 /* Now set the offsets for each partition */
cd88939f 1405 current_offset = BBSIZE / lp->d_secsize; /* in sectors */
984263bc
MD
1406 seen_default_offset = 0;
1407 for (i = 0; i < lp->d_npartitions; i++) {
1408 part = 'a' + i;
1409 pp = &lp->d_partitions[i];
1410 if (part_set[i]) {
1411 if (part_offset_type[i] == '*') {
1412 if (i == RAW_PART) {
1413 pp->p_offset = 0;
1414 } else {
1415 pp->p_offset = current_offset;
1416 seen_default_offset = 1;
1417 }
1418 } else {
1419 /* allow them to be out of order for old-style tables */
ce19f97e 1420 if (pp->p_offset < current_offset &&
984263bc
MD
1421 seen_default_offset && i != RAW_PART &&
1422 pp->p_fstype != FS_VINUM) {
1423 fprintf(stderr,
1424"Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1425 (long)pp->p_offset,i+'a',current_offset);
1426 fprintf(stderr,
1427"Labels with any *'s for offset must be in ascending order by sector\n");
1428 errors++;
1429 } else if (pp->p_offset != current_offset &&
1430 i != RAW_PART && seen_default_offset) {
ce19f97e
MD
1431 /*
1432 * this may give unneeded warnings if
984263bc
MD
1433 * partitions are out-of-order
1434 */
1435 Warning(
1436"Offset %ld for partition %c doesn't match expected value %ld",
1437 (long)pp->p_offset, i + 'a', current_offset);
1438 }
1439 }
1440 if (i != RAW_PART)
ce19f97e 1441 current_offset = pp->p_offset + pp->p_size;
984263bc
MD
1442 }
1443 }
1444
1445 for (i = 0; i < lp->d_npartitions; i++) {
1446 part = 'a' + i;
1447 pp = &lp->d_partitions[i];
1448 if (pp->p_size == 0 && pp->p_offset != 0)
1449 Warning("partition %c: size 0, but offset %lu",
1450 part, (u_long)pp->p_offset);
1451#ifdef notdef
1452 if (pp->p_size % lp->d_secpercyl)
1453 Warning("partition %c: size %% cylinder-size != 0",
1454 part);
1455 if (pp->p_offset % lp->d_secpercyl)
1456 Warning("partition %c: offset %% cylinder-size != 0",
1457 part);
1458#endif
1459 if (pp->p_offset > lp->d_secperunit) {
1460 fprintf(stderr,
1461 "partition %c: offset past end of unit\n", part);
1462 errors++;
1463 }
1464 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1465 fprintf(stderr,
1466 "partition %c: partition extends past end of unit\n",
1467 part);
1468 errors++;
1469 }
1470 if (i == RAW_PART)
1471 {
1472 if (pp->p_fstype != FS_UNUSED)
1473 Warning("partition %c is not marked as unused!",part);
1474 if (pp->p_offset != 0)
1475 Warning("partition %c doesn't start at 0!",part);
1476 if (pp->p_size != lp->d_secperunit)
1477 Warning("partition %c doesn't cover the whole unit!",part);
1478
1479 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1480 (pp->p_size != lp->d_secperunit)) {
1481 Warning("An incorrect partition %c may cause problems for "
1482 "standard system utilities",part);
1483 }
1484 }
1485
1486 /* check for overlaps */
1487 /* this will check for all possible overlaps once and only once */
1488 for (j = 0; j < i; j++) {
1489 pp2 = &lp->d_partitions[j];
ce19f97e 1490 if (j != RAW_PART && i != RAW_PART &&
984263bc
MD
1491 pp->p_fstype != FS_VINUM &&
1492 pp2->p_fstype != FS_VINUM &&
1493 part_set[i] && part_set[j]) {
1494 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1495 (pp2->p_offset + pp2->p_size > pp->p_offset ||
1496 pp2->p_offset >= pp->p_offset)) {
1497 fprintf(stderr,"partitions %c and %c overlap!\n",
1498 j + 'a', i + 'a');
1499 errors++;
1500 }
1501 }
1502 }
1503 }
9e792b7e 1504 for (; i < 8 || i < lp->d_npartitions; i++) {
984263bc
MD
1505 part = 'a' + i;
1506 pp = &lp->d_partitions[i];
1507 if (pp->p_size || pp->p_offset)
1508 Warning("unused partition %c: size %d offset %lu",
1509 'a' + i, pp->p_size, (u_long)pp->p_offset);
1510 }
1511 return (errors);
1512}
1513
1514/*
1515 * When operating on a "virgin" disk, try getting an initial label
1516 * from the associated device driver. This might work for all device
1517 * drivers that are able to fetch some initial device parameters
1518 * without even having access to a (BSD) disklabel, like SCSI disks,
1519 * most IDE drives, or vn devices.
984263bc 1520 */
2b961883 1521static struct disklabel32 dlab;
e5d03018 1522
2b961883 1523struct disklabel32 *
984263bc
MD
1524getvirginlabel(void)
1525{
5c5f4647 1526 struct partinfo info;
2b961883 1527 struct disklabel32 *dl = &dlab;
984263bc
MD
1528 int f;
1529
d736a600
MD
1530 if ((f = open(dkname, O_RDONLY)) == -1) {
1531 warn("cannot open %s", dkname);
984263bc
MD
1532 return (NULL);
1533 }
1534
1535 /*
5c5f4647
MD
1536 * Check to see if the media is too big for a 32 bit disklabel.
1537 */
1538 if (ioctl(f, DIOCGPART, &info) == 0) {
1539 if (info.media_size >= 0x100000000ULL * 512) {
cc298a13
MD
1540 warnx("The media is too large for a 32 bit disklabel,"
1541 " please use disklabel64.");
5c5f4647
MD
1542 return (NULL);
1543 }
1544 }
1545
1546 /*
1547 * Generate a virgin disklabel via ioctl
984263bc 1548 */
2b961883 1549 if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) {
0ffe40b3
MD
1550 l_perror("ioctl DIOCGDVIRGIN32");
1551 close(f);
1552 return(NULL);
984263bc
MD
1553 }
1554 close(f);
e5d03018
MD
1555 return (dl);
1556}
1557
2b961883 1558struct disklabel32 *
e5d03018
MD
1559getdisklabelfromdisktab(const char *name)
1560{
1561 struct disktab *dt;
2b961883 1562 struct disklabel32 *dl = &dlab;
e5d03018
MD
1563 int i;
1564
1565 if ((dt = getdisktabbyname(name)) == NULL)
1566 return(NULL);
2b961883 1567 dl->d_magic = DISKMAGIC32;
e5d03018
MD
1568 dl->d_type = dt->d_typeid;
1569 dl->d_subtype = 0;
1570 dl->d_secsize = dt->d_media_blksize;
1571 dl->d_nsectors = dt->d_secpertrack;
1572 dl->d_ntracks = dt->d_nheads;
1573 dl->d_ncylinders = dt->d_ncylinders;
1574 dl->d_secpercyl = dt->d_secpercyl;
1575 dl->d_secperunit = dt->d_media_blocks;
1576 dl->d_rpm = dt->d_rpm;
1577 dl->d_interleave = dt->d_interleave;
1578 dl->d_trackskew = dt->d_trackskew;
1579 dl->d_cylskew = dt->d_cylskew;
1580 dl->d_headswitch = dt->d_headswitch;
1581 dl->d_trkseek = dt->d_trkseek;
2b961883 1582 dl->d_magic2 = DISKMAGIC32;
e5d03018
MD
1583 dl->d_npartitions = dt->d_npartitions;
1584 dl->d_bbsize = dt->d_bbsize;
1585 dl->d_sbsize = dt->d_sbsize;
1586 for (i = 0; i < dt->d_npartitions; ++i) {
2b961883 1587 struct partition32 *dlp = &dl->d_partitions[i];
e5d03018
MD
1588 struct dt_partition *dtp = &dt->d_partitions[i];
1589
1590 dlp->p_size = dtp->p_size;
1591 dlp->p_offset = dtp->p_offset;
1592 dlp->p_fsize = dtp->p_fsize;
1593 dlp->p_fstype = dtp->p_fstype;
1594 dlp->p_frag = dtp->p_fsize;
1595 }
1596 return(dl);
984263bc
MD
1597}
1598
1599/*
1600 * If we are installing a boot program that doesn't fit in d_bbsize
1601 * we need to mark those partitions that the boot overflows into.
1602 * This allows newfs to prevent creation of a filesystem where it might
1603 * clobber bootstrap code.
1604 */
1605void
2b961883 1606setbootflag(struct disklabel32 *lp)
984263bc 1607{
2b961883 1608 struct partition32 *pp;
984263bc
MD
1609 int i, errors = 0;
1610 char part;
1611 u_long boffset;
1612
1613 if (bootbuf == 0)
1614 return;
1615 boffset = bootsize / lp->d_secsize;
1616 for (i = 0; i < lp->d_npartitions; i++) {
1617 part = 'a' + i;
1618 pp = &lp->d_partitions[i];
1619 if (pp->p_size == 0)
1620 continue;
1621 if (boffset <= pp->p_offset) {
1622 if (pp->p_fstype == FS_BOOT)
1623 pp->p_fstype = FS_UNUSED;
1624 } else if (pp->p_fstype != FS_BOOT) {
1625 if (pp->p_fstype != FS_UNUSED) {
1626 fprintf(stderr,
1627 "boot overlaps used partition %c\n",
1628 part);
1629 errors++;
1630 } else {
1631 pp->p_fstype = FS_BOOT;
1632 Warning("boot overlaps partition %c, %s",
1633 part, "marked as FS_BOOT");
1634 }
1635 }
1636 }
1637 if (errors)
1638 errx(4, "cannot install boot program");
1639}
1640
1641/*VARARGS1*/
1642void
1643Warning(const char *fmt, ...)
1644{
1645 va_list ap;
1646
1647 fprintf(stderr, "Warning, ");
1648 va_start(ap, fmt);
1649 vfprintf(stderr, fmt, ap);
1650 fprintf(stderr, "\n");
1651 va_end(ap);
1652}
1653
9e792b7e
MD
1654/*
1655 * Check to see if the bootblocks are in the wrong place. FBsd5 bootblocks
1656 * and earlier DFly bb's are packed against the old disklabel and a new
1657 * disklabel would blow them up. This is a hack that should be removed
1658 * in 2006 sometime (if ever).
1659 */
1660
1661int
93217a19 1662checkoldboot(int f, const char *bootbuffer)
9e792b7e
MD
1663{
1664 char buf[BBSIZE];
1665
93217a19 1666 if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0)
9e792b7e
MD
1667 return(0);
1668 lseek(f, (off_t)0, SEEK_SET);
1669 if (read(f, buf, sizeof(buf)) != sizeof(buf))
1670 return(0);
1671 if (strncmp(buf + 0x402, "BTX", 3) == 0) /* new location */
1672 return(0);
1673 if (strncmp(buf + 0x316, "BTX", 3) == 0) /* old location */
1674 return(1);
1675 return(0);
1676}
1677
2b961883
MD
1678/*
1679 * Traditional 32 bit disklabels actually use absolute sector numbers on
1680 * disk, NOT slice relative sector numbres. The OS hides this from us
1681 * when we use DIOC ioctls to access the label, but newer versions of
1682 * Dragonfly no longer adjusts the disklabel when snooping reads or writes
1683 * so we have to figure it out ourselves.
1684 */
1685const char *
1686fixlabel(int f, struct disklabel32 *lp, int writeadj)
1687{
1688 const char *msg = NULL;
1689 struct partinfo info;
1690 struct partition32 *pp;
1691 u_int64_t start;
1692 u_int64_t end;
1693 u_int64_t offset;
1694 int part;
1695 int rev;
a67bacc9 1696 size_t rev_len = sizeof(rev);
2b961883
MD
1697
1698 if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) {
1699 errx(1, "Cannot use raw mode on non-DragonFly systems\n");
1700 }
1701 if (rev < 200701) {
1702 warnx("Warning running new disklabel on old DragonFly systems,\n"
1703 "assuming the disk layer will fixup the label.\n");
1704 sleep(3);
1705 return(NULL);
1706 }
1707
1708 pp = &lp->d_partitions[RAW_PART];
1709
1710 if (forceflag) {
1711 info.media_offset = slice_start_lba * lp->d_secsize;
1712 info.media_blocks = pp->p_size;
1713 info.media_blksize = lp->d_secsize;
1714 } else if (ioctl(f, DIOCGPART, &info) < 0) {
1715 msg = "Unable to extract the slice starting LBA, "
1716 "you must use the -f <slice_start_lba> option\n"
1717 "to specify it manually, or perhaps try without "
1718 "using -r and let the kernel deal with it\n";
1719 return(msg);
1720 }
1721
1722 if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
1723 return ("fixlabel: invalid magic");
1724 if (dkcksum32(lp) != 0)
1725 return ("fixlabel: invalid checksum");
1726
1727 /*
1728 * What a mess. For ages old backwards compatibility the disklabel
1729 * on-disk stores absolute offsets instead of slice-relative offsets.
1730 * So fix it up when reading, writing, or snooping.
1731 *
1732 * The in-core label is always slice-relative.
1733 */
1734 if (writeadj) {
1735 /*
1736 * incore -> disk
1737 */
1738 start = 0;
1739 offset = info.media_offset / info.media_blksize;
1740 } else {
1741 /*
1742 * disk -> incore
1743 */
1744 start = info.media_offset / info.media_blksize;
1745 offset = -info.media_offset / info.media_blksize;
1746 }
1747 if (pp->p_offset != start)
1748 return ("fixlabel: raw partition offset != slice offset");
1749 if (pp->p_size != info.media_blocks) {
1750 if (pp->p_size > info.media_blocks)
1751 return ("fixlabel: raw partition size > slice size");
1752 }
1753 end = start + info.media_blocks;
1754 if (start > end)
1755 return ("fixlabel: slice wraps");
1756 if (lp->d_secpercyl <= 0)
1757 return ("fixlabel: d_secpercyl <= 0");
1758 pp -= RAW_PART;
1759 for (part = 0; part < lp->d_npartitions; part++, pp++) {
1760 if (pp->p_offset != 0 || pp->p_size != 0) {
1761 if (pp->p_offset < start
1762 || pp->p_offset + pp->p_size > end
1763 || pp->p_offset + pp->p_size < pp->p_offset) {
1764 /* XXX else silently discard junk. */
1765 bzero(pp, sizeof *pp);
1766 } else {
1767 pp->p_offset += offset;
1768 }
1769 }
1770 }
1771 lp->d_checksum = 0;
1772 lp->d_checksum = dkcksum32(lp);
1773 return (NULL);
1774}
1775
984263bc
MD
1776void
1777usage(void)
1778{
1779#if NUMBOOT > 0
1780 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",
1781 "usage: disklabel [-r] disk",
1782 "\t\t(to read label)",
dd65b2c3 1783 " disklabel -w [-r] [-n] disk type [packid]",
984263bc
MD
1784 "\t\t(to write label with existing boot program)",
1785 " disklabel -e [-r] [-n] disk",
1786 "\t\t(to edit label)",
1787 " disklabel -R [-r] [-n] disk protofile",
1788 "\t\t(to restore label with existing boot program)",
1789#if NUMBOOT > 1
dd65b2c3 1790 " disklabel -B [-n] [-b boot1 -s boot2] disk [type]",
984263bc 1791 "\t\t(to install boot program with existing label)",
dd65b2c3 1792 " disklabel -w -B [-n] [-b boot1 -s boot2] disk type [packid]",
984263bc 1793 "\t\t(to write label and boot program)",
dd65b2c3 1794 " disklabel -R -B [-n] [-b boot1 -s boot2] disk protofile [type]",
984263bc
MD
1795 "\t\t(to restore label and boot program)",
1796#else
dd65b2c3 1797 " disklabel -B [-n] [-b bootprog] disk [type]",
984263bc 1798 "\t\t(to install boot program with existing on-disk label)",
dd65b2c3 1799 " disklabel -w -B [-n] [-b bootprog] disk type [packid]",
984263bc 1800 "\t\t(to write label and install boot program)",
dd65b2c3 1801 " disklabel -R -B [-n] [-b bootprog] disk protofile [type]",
984263bc
MD
1802 "\t\t(to restore label and install boot program)",
1803#endif
1804 " disklabel [-NW] disk",
1805 "\t\t(to write disable/enable label)");
1806#else
1807 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1808 "usage: disklabel [-r] disk", "(to read label)",
dd65b2c3 1809 " disklabel -w [-r] [-n] disk type [packid]",
984263bc
MD
1810 "\t\t(to write label)",
1811 " disklabel -e [-r] [-n] disk",
1812 "\t\t(to edit label)",
1813 " disklabel -R [-r] [-n] disk protofile",
1814 "\t\t(to restore label)",
1815 " disklabel [-NW] disk",
1816 "\t\t(to write disable/enable label)");
1817#endif
395137b5
TN
1818 fprintf(stderr, "%s\n%s\n",
1819 " disklabel [-f slice_start_lba] [options]",
1820 "\t\t(to force using manual offset)");
984263bc
MD
1821 exit(1);
1822}