?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
microuptime.9 microtime.9: Fix documentation of the get* function versions.
[dragonfly.git] / sbin / fdisk / fdisk.c
blob63871ac16f3fb2341f60078ac24fad1c40221123
1 /*
2 * Mach Operating System
3 * Copyright (c) 1992 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 *
26 * $FreeBSD: /repoman/r/ncvs/src/sbin/i386/fdisk/fdisk.c,v 1.36.2.14 2004/01/30 14:40:47 harti Exp $
27 */
28
29 #include <sys/param.h>
30 #include <sys/diskslice.h>
31 #include <sys/diskmbr.h>
32 #include <sys/ioctl_compat.h>
33 #include <sys/sysctl.h>
34 #include <sys/stat.h>
35 #include <ctype.h>
36 #include <fcntl.h>
37 #include <err.h>
38 #include <fstab.h>
39 #include <errno.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <unistd.h>
44
45 #define LBUF 100
46 static char lbuf[LBUF];
47
48 /*
49 *
50 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
51 *
52 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
53 * Copyright (c) 1989 Robert. V. Baron
54 * Created.
55 */
56
57 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
58 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
59 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
60 #define MAX_SECTORS_PER_TRACK 0x3f /* maximum number of sectors per track */
61 #define MIN_SECTORS_PER_TRACK 0x1 /* minimum number of sectors per track */
62 #define MAX_HEADS 0xff /* maximum number of head */
63 static int secsize = 0; /* the sensed sector size */
64
65 static int fd; /* file descriptor of the given disk */
66 static const char *disk;
67 static const char *disks[] =
68 {
69 "/dev/ad0", "/dev/da0", "/dev/vkd0", 0
70 };
71
72 static int cyls, sectors, heads, cylsecs;
73 static int64_t disksecs;
74
75 struct mboot
76 {
77 unsigned char padding[2]; /* force the longs to be long aligned */
78 unsigned char *bootinst; /* boot code */
79 off_t bootinst_size;
80 struct dos_partition parts[4];
81 };
82 static struct mboot mboot;
83
84 #define ACTIVE 0x80
85 #define BOOT_MAGIC 0xAA55
86
87 int dos_cyls;
88 int dos_heads;
89 int dos_sectors;
90 int dos_cylsecs;
91
92 #define DOSSECT(s,c) ((s & MAX_SECTORS_PER_TRACK) | ((c >> 2) & 0xc0))
93 #define DOSCYL(c) (c & 0xff)
94 #define MAXCYL 1023
95 static int partition = -1;
96
97 #define MAX_ARGS 10
98 static int current_line_number;
99
100 static int geom_processed = 0;
101 static int part_processed = 0;
102 static int active_processed = 0;
103
104 typedef struct cmd {
105 char cmd;
106 int n_args;
107 struct arg {
108 char argtype;
109 long long arg_val;
110 } args[MAX_ARGS];
111 } CMD;
112
113 static int B_flag = 0; /* replace boot code */
114 static int C_flag = 0; /* use wrapped values for CHS */
115 static int E_flag = 0; /* Erase through TRIM */
116 static int I_flag = 0; /* use entire disk for DragonFly */
117 static int a_flag = 0; /* set active partition */
118 static char *b_flag = NULL; /* path to boot code */
119 static int i_flag = 0; /* replace partition data */
120 static int u_flag = 0; /* update partition data */
121 static int p_flag = 0; /* operate on a disk image file */
122 static int s_flag = 0; /* Print a summary and exit */
123 static int t_flag = 0; /* test only */
124 static char *f_flag = NULL; /* Read config info from file */
125 static int v_flag = 0; /* Be verbose */
126
127 struct part_type
128 {
129 unsigned char type;
130 const char *name;
131 }part_types[] =
132 {
133 {0x00, "unused"}
134 ,{0x01, "Primary DOS with 12 bit FAT"}
135 ,{0x02, "XENIX / filesystem"}
136 ,{0x03, "XENIX /usr filesystem"}
137 ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"}
138 ,{0x05, "Extended DOS"}
139 ,{0x06, "Primary 'big' DOS (> 32MB)"}
140 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
141 ,{0x08, "AIX filesystem"}
142 ,{0x09, "AIX boot partition or Coherent"}
143 ,{0x0A, "OS/2 Boot Manager or OPUS"}
144 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
145 ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"}
146 ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"}
147 ,{0x0F, "Extended DOS, LBA"}
148 ,{0x10, "OPUS"}
149 ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
150 ,{0x12, "Compaq diagnostics"}
151 ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
152 ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
153 ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
154 ,{0x18, "AST Windows swapfile"}
155 ,{0x24, "NEC DOS"}
156 ,{0x39, "plan9"}
157 ,{0x3C, "PartitionMagic recovery"}
158 ,{0x40, "VENIX 286"}
159 ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"}
160 ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"}
161 ,{0x43, "Linux native (sharing disk with DRDOS)"}
162 ,{0x4D, "QNX 4.2 Primary"}
163 ,{0x4E, "QNX 4.2 Secondary"}
164 ,{0x4F, "QNX 4.2 Tertiary"}
165 ,{0x50, "DM"}
166 ,{0x51, "DM"}
167 ,{0x52, "CP/M or Microport SysV/AT"}
168 ,{0x53, "DM6 Aux3"}
169 ,{0x54, "DM6"}
170 ,{0x55, "EZ-Drive (disk manager)"}
171 ,{0x56, "GB"}
172 ,{0x5C, "Priam Edisk (disk manager)"} /* according to S. Widlake */
173 ,{0x61, "Speed"}
174 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
175 ,{0x64, "Novell Netware 2.xx"}
176 ,{0x65, "Novell Netware 3.xx"}
177 ,{0x6C, "DragonFlyBSD"}
178 ,{0x70, "DiskSecure Multi-Boot"}
179 ,{0x75, "PCIX"}
180 ,{0x77, "QNX4.x"}
181 ,{0x78, "QNX4.x 2nd part"}
182 ,{0x79, "QNX4.x 3rd part"}
183 ,{0x80, "Minix 1.1 ... 1.4a"}
184 ,{0x81, "Minix 1.4b ... 1.5.10"}
185 ,{0x82, "Linux swap or Solaris x86"}
186 ,{0x83, "Linux filesystem"}
187 ,{0x84, "OS/2 hidden C: drive"}
188 ,{0x85, "Linux extended"}
189 ,{0x86, "NTFS volume set??"}
190 ,{0x87, "NTFS volume set??"}
191 ,{0x93, "Amoeba filesystem"}
192 ,{0x94, "Amoeba bad block table"}
193 ,{0x9F, "BSD/OS"}
194 ,{0xA0, "Suspend to Disk"}
195 ,{0xA5, "DragonFly/FreeBSD/NetBSD/386BSD"}
196 ,{0xA6, "OpenBSD"}
197 ,{0xA7, "NEXTSTEP"}
198 ,{0xA9, "NetBSD"}
199 ,{0xAC, "IBM JFS"}
200 ,{0xB7, "BSDI BSD/386 filesystem"}
201 ,{0xB8, "BSDI BSD/386 swap"}
202 ,{0xBE, "Solaris x86 boot"}
203 ,{0xC1, "DRDOS/sec with 12-bit FAT"}
204 ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"}
205 ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"}
206 ,{0xC7, "Syrinx"}
207 ,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
208 ,{0xE1, "Speed"}
209 ,{0xE3, "Speed"}
210 ,{0xE4, "Speed"}
211 ,{0xEB, "BeOS file system"}
212 ,{0xEE, "EFI GPT"}
213 ,{0xEF, "EFI System Partition"}
214 ,{0xF1, "Speed"}
215 ,{0xF2, "DOS 3.3+ Secondary"}
216 ,{0xF4, "Speed"}
217 ,{0xFE, "SpeedStor >1024 cyl. or LANstep"}
218 ,{0xFF, "BBT (Bad Blocks Table)"}
219 };
220
221 static void print_s0(int which);
222 static void print_part(int i);
223 static void init_sector0(unsigned long start);
224 static void init_boot(void);
225 static void change_part(int i);
226 static void print_params(void);
227 static void change_active(int which);
228 static void change_code(void);
229 static void get_params_to_use(void);
230 static void dos(struct dos_partition *partp);
231 static int open_disk(void);
232 static void erase_partition(int i);
233 static ssize_t read_disk(off_t sector, void *buf);
234 static ssize_t write_disk(off_t sector, void *buf);
235 static int get_params(void);
236 static int read_s0(void);
237 static int write_s0(void);
238 static int ok(const char *str);
239 static int decimal(const char *str, int *num, int deflt);
240 static const char *get_type(int type);
241 static int read_config(char *config_file);
242 static void reset_boot(void);
243 static int sanitize_partition(struct dos_partition *);
244 static void usage(void);
245
246 int
247 main(int argc, char *argv[])
248 {
249 int c, i;
250
251 while ((c = getopt(argc, argv, "BCEIab:f:p:istuv1234")) != -1)
252 switch (c) {
253 case 'B':
254 B_flag = 1;
255 break;
256 case 'C':
257 C_flag = 1;
258 break;
259 case 'E':
260 E_flag = 1;
261 break;
262 case 'I':
263 I_flag = 1;
264 break;
265 case 'a':
266 a_flag = 1;
267 break;
268 case 'b':
269 b_flag = optarg;
270 break;
271 case 'f':
272 f_flag = optarg;
273 break;
274 case 'p':
275 disk = optarg;
276 p_flag = 1;
277 break;
278 case 'i':
279 i_flag = 1;
280 break;
281 case 's':
282 s_flag = 1;
283 break;
284 case 't':
285 t_flag = 1;
286 break;
287 case 'u':
288 u_flag = 1;
289 break;
290 case 'v':
291 v_flag = 1;
292 break;
293 case '1':
294 case '2':
295 case '3':
296 case '4':
297 partition = c - '0';
298 break;
299 default:
300 usage();
301 }
302 if (f_flag || i_flag)
303 u_flag = 1;
304 if (t_flag)
305 v_flag = 1;
306 argc -= optind;
307 argv += optind;
308
309 if (argc > 0) {
310 disk = getdevpath(argv[0], 0);
311 if (open_disk() < 0)
312 err(1, "cannot open disk %s", disk);
313 } else if (disk == NULL) {
314 int rv = 0;
315
316 for(i = 0; disks[i]; i++)
317 {
318 disk = disks[i];
319 rv = open_disk();
320 if (rv != -2) break;
321 }
322 if (rv < 0)
323 err(1, "cannot open any disk");
324 } else {
325 if (open_disk() < 0)
326 err(1, "cannot open disk %s", disk);
327 }
328
329 /* (abu)use mboot.bootinst to probe for the sector size */
330 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
331 err(1, "cannot allocate buffer to determine disk sector size");
332 read_disk(0, mboot.bootinst);
333 free(mboot.bootinst);
334 mboot.bootinst = NULL;
335
336 if (s_flag)
337 {
338 int j;
339 struct dos_partition *partp;
340
341 if (read_s0())
342 err(1, "read_s0");
343 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
344 dos_sectors);
345 printf("Part %11s %11s Type Flags\n", "Start", "Size");
346 for (j = 0; j < NDOSPART; j++) {
347 partp = ((struct dos_partition *) &mboot.parts) + j;
348 if (partp->dp_start == 0 && partp->dp_size == 0)
349 continue;
350 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", j + 1,
351 (u_long) partp->dp_start,
352 (u_long) partp->dp_size, partp->dp_typ,
353 partp->dp_flag);
354 }
355 exit(0);
356 }
357
358 printf("******* Working on device %s *******\n",disk);
359
360 if (I_flag)
361 {
362 struct dos_partition *partp;
363
364 read_s0();
365 reset_boot();
366 partp = (struct dos_partition *) (&mboot.parts[0]);
367 partp->dp_typ = DOSPTYP_DFLYBSD;
368 partp->dp_flag = ACTIVE;
369 partp->dp_start = dos_sectors;
370 if (disksecs - dos_sectors > 0xFFFFFFFFU) {
371 printf("Warning: Ending logical block > 2TB, using max value\n");
372 partp->dp_size = 0xFFFFFFFFU;
373 } else {
374 partp->dp_size = (disksecs / dos_cylsecs) *
375 dos_cylsecs - dos_sectors;
376 }
377 dos(partp);
378 if (v_flag)
379 print_s0(-1);
380
381 if (E_flag) {
382 /* Trim now if we're using the entire device */
383 erase_partition(0);
384 }
385
386 if (!t_flag)
387 write_s0();
388 exit(0);
389 }
390 if (f_flag)
391 {
392 if (read_s0() || i_flag)
393 {
394 reset_boot();
395 }
396
397 if (!read_config(f_flag))
398 {
399 exit(1);
400 }
401 if (v_flag)
402 {
403 print_s0(-1);
404 }
405 if (!t_flag)
406 {
407 write_s0();
408 }
409 }
410 else
411 {
412 if (u_flag)
413 {
414 get_params_to_use();
415 }
416 else
417 {
418 print_params();
419 }
420
421 if (read_s0())
422 init_sector0(dos_sectors);
423
424 printf("Media sector size is %d\n", secsize);
425 printf("Warning: BIOS sector numbering starts with sector 1\n");
426 printf("Information from DOS bootblock is:\n");
427 if (partition == -1)
428 for (i = 1; i <= NDOSPART; i++)
429 change_part(i);
430 else
431 change_part(partition);
432
433 if (u_flag || a_flag)
434 change_active(partition);
435
436 if (B_flag)
437 change_code();
438
439 if (u_flag || a_flag || B_flag) {
440 if (!t_flag) {
441 printf("\nWe haven't changed the partition table yet. ");
442 printf("This is your last chance.\n");
443 }
444 print_s0(-1);
445 if (!t_flag) {
446 if (ok("Should we write new partition table?")) {
447 if (E_flag && u_flag) {
448 /*
449 * Trim now because we've committed to
450 * updating the partition.
451 */
452 if (partition == -1)
453 for (i = 0; i < NDOSPART; i++)
454 erase_partition(i);
455 else
456 erase_partition(partition);
457 }
458 write_s0();
459 }
460 }
461 else
462 {
463 printf("\n-t flag specified -- partition table not written.\n");
464 }
465 }
466 }
467
468 exit(0);
469 }
470
471 static void
472 usage(void)
473 {
474 fprintf(stderr, "%s%s",
475 "usage: fdisk [-BCEIaistu] [-b bootcode] [-p diskimage] [-1234] [disk]\n",
476 " fdisk -f configfile [-itv] [disk]\n");
477 exit(1);
478 }
479
480 static void
481 print_s0(int which)
482 {
483 int i;
484
485 print_params();
486 printf("Information from DOS bootblock is:\n");
487 if (which == -1)
488 for (i = 1; i <= NDOSPART; i++)
489 printf("%d: ", i), print_part(i);
490 else
491 print_part(which);
492 }
493
494 static struct dos_partition mtpart = { 0 };
495
496 static void
497 print_part(int i)
498 {
499 struct dos_partition *partp;
500 uint64_t part_mb;
501
502 partp = ((struct dos_partition *) &mboot.parts) + i - 1;
503
504 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
505 printf("<UNUSED>\n");
506 return;
507 }
508 /*
509 * Be careful not to overflow.
510 */
511 part_mb = partp->dp_size;
512 part_mb *= secsize;
513 part_mb /= (1024 * 1024);
514 printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
515 printf(" start %lu, size %lu (%jd Meg), flag %x%s\n",
516 (u_long)partp->dp_start,
517 (u_long)partp->dp_size,
518 (intmax_t)part_mb,
519 partp->dp_flag,
520 partp->dp_flag == ACTIVE ? " (active)" : "");
521 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
522 ,DPCYL(partp->dp_scyl, partp->dp_ssect)
523 ,partp->dp_shd
524 ,DPSECT(partp->dp_ssect)
525 ,DPCYL(partp->dp_ecyl, partp->dp_esect)
526 ,partp->dp_ehd
527 ,DPSECT(partp->dp_esect));
528 }
529
530
531 static void
532 init_boot(void)
533 {
534 const char *fname;
535 int boot_fd, n;
536 struct stat sb;
537
538 fname = b_flag ? b_flag : "/boot/mbr";
539 if ((boot_fd = open(fname, O_RDONLY)) == -1 ||
540 fstat(boot_fd, &sb) == -1)
541 err(1, "%s", fname);
542 if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
543 errx(1, "%s: length must be a multiple of sector size", fname);
544 if (mboot.bootinst != NULL)
545 free(mboot.bootinst);
546 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
547 errx(1, "%s: unable to allocate read buffer", fname);
548 if ((n = read(boot_fd, mboot.bootinst, mboot.bootinst_size)) == -1 ||
549 close(boot_fd))
550 err(1, "%s", fname);
551 if (n != mboot.bootinst_size)
552 errx(1, "%s: short read", fname);
553 }
554
555
556 static void
557 init_sector0(unsigned long start)
558 {
559 struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]);
560
561 init_boot();
562
563 partp->dp_typ = DOSPTYP_DFLYBSD;
564 partp->dp_flag = ACTIVE;
565 start = roundup(start, dos_sectors);
566 if (start == 0)
567 start = dos_sectors;
568 partp->dp_start = start;
569 if (disksecs - start > 0xFFFFFFFFU) {
570 printf("Warning: Ending logical block > 2TB, using max value\n");
571 partp->dp_size = 0xFFFFFFFFU;
572 } else {
573 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
574 }
575
576 dos(partp);
577 }
578
579 static void
580 change_part(int i)
581 {
582 struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1;
583
584 printf("The data for partition %d is:\n", i);
585 print_part(i);
586
587 if (u_flag && ok("Do you want to change it?")) {
588 int tmp;
589
590 if (i_flag) {
591 bzero((char *)partp, sizeof (struct dos_partition));
592 if (i == 4) {
593 init_sector0(1);
594 printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n");
595 print_part(i);
596 }
597 }
598
599 do {
600 Decimal("sysid (165=DragonFly)", partp->dp_typ, tmp);
601 Decimal("start", partp->dp_start, tmp);
602 Decimal("size", partp->dp_size, tmp);
603 if (!sanitize_partition(partp)) {
604 warnx("ERROR: failed to adjust; setting sysid to 0");
605 partp->dp_typ = 0;
606 }
607
608 if (ok("Explicitly specify beg/end address ?"))
609 {
610 int tsec,tcyl,thd;
611 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
612 thd = partp->dp_shd;
613 tsec = DPSECT(partp->dp_ssect);
614 Decimal("beginning cylinder", tcyl, tmp);
615 Decimal("beginning head", thd, tmp);
616 Decimal("beginning sector", tsec, tmp);
617 if (tcyl > MAXCYL && C_flag == 0) {
618 printf("Warning: starting cylinder wraps, using all 1's\n");
619 partp->dp_scyl = -1;
620 partp->dp_ssect = -1;
621 partp->dp_shd = -1;
622 } else {
623 partp->dp_scyl = DOSCYL(tcyl);
624 partp->dp_ssect = DOSSECT(tsec,tcyl);
625 partp->dp_shd = thd;
626 }
627
628 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
629 thd = partp->dp_ehd;
630 tsec = DPSECT(partp->dp_esect);
631 Decimal("ending cylinder", tcyl, tmp);
632 Decimal("ending head", thd, tmp);
633 Decimal("ending sector", tsec, tmp);
634 if (tcyl > MAXCYL && C_flag == 0) {
635 printf("Warning: ending cylinder wraps, using all 1's\n");
636 partp->dp_ecyl = -1;
637 partp->dp_esect = -1;
638 partp->dp_ehd = -1;
639 } else {
640 partp->dp_ecyl = DOSCYL(tcyl);
641 partp->dp_esect = DOSSECT(tsec,tcyl);
642 partp->dp_ehd = thd;
643 }
644 } else
645 dos(partp);
646
647 print_part(i);
648 } while (!ok("Are we happy with this entry?"));
649 }
650 }
651
652 static void
653 print_params(void)
654 {
655 printf("parameters extracted from device are:\n");
656 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
657 ,cyls,heads,sectors,cylsecs);
658 if ((dos_sectors > MAX_SECTORS_PER_TRACK) || (dos_cyls > MAXCYL) || (dos_heads > MAX_HEADS))
659 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
660 printf("parameters to be used for BIOS calculations are:\n");
661 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
662 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
663 }
664
665 static void
666 change_active(int which)
667 {
668 struct dos_partition *partp = &mboot.parts[0];
669 int active, i, new, tmp;
670
671 active = -1;
672 for (i = 0; i < NDOSPART; i++) {
673 if ((partp[i].dp_flag & ACTIVE) == 0)
674 continue;
675 printf("Partition %d is marked active\n", i + 1);
676 if (active == -1)
677 active = i + 1;
678 }
679 if (a_flag && which != -1)
680 active = which;
681 else if (active == -1)
682 active = 1;
683
684 if (!ok("Do you want to change the active partition?"))
685 return;
686 setactive:
687 do {
688 new = active;
689 Decimal("active partition", new, tmp);
690 if (new < 1 || new > 4) {
691 printf("Active partition number must be in range 1-4."
692 " Try again.\n");
693 goto setactive;
694 }
695 active = new;
696 } while (!ok("Are you happy with this choice"));
697 for (i = 0; i < NDOSPART; i++)
698 partp[i].dp_flag = 0;
699 if (active > 0 && active <= NDOSPART)
700 partp[active-1].dp_flag = ACTIVE;
701 }
702
703 static void
704 change_code(void)
705 {
706 if (ok("Do you want to change the boot code?"))
707 init_boot();
708 }
709
710 void
711 get_params_to_use(void)
712 {
713 int tmp;
714 print_params();
715 if (ok("Do you want to change our idea of what BIOS thinks ?"))
716 {
717 do
718 {
719 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
720 Decimal("BIOS's idea of #heads", dos_heads, tmp);
721 Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
722 dos_cylsecs = dos_heads * dos_sectors;
723 print_params();
724 }
725 while(!ok("Are you happy with this choice"));
726 }
727 }
728
729
730 /***********************************************\
731 * Change real numbers into strange dos numbers *
732 \***********************************************/
733 static void
734 dos(struct dos_partition *partp)
735 {
736 int cy, sec;
737 uint32_t end;
738
739 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
740 memcpy(partp, &mtpart, sizeof(*partp));
741 return;
742 }
743
744 /* Start c/h/s. */
745 cy = partp->dp_start / dos_cylsecs;
746 sec = partp->dp_start % dos_sectors + 1;
747 if (cy > MAXCYL && C_flag == 0) {
748 printf("Warning: starting cylinder wraps, using all 1's\n");
749 partp->dp_shd = -1;
750 partp->dp_scyl = -1;
751 partp->dp_ssect = -1;
752 } else {
753 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
754 partp->dp_scyl = DOSCYL(cy);
755 partp->dp_ssect = DOSSECT(sec, cy);
756 }
757
758 /* End c/h/s. */
759 end = partp->dp_start + partp->dp_size - 1;
760 cy = end / dos_cylsecs;
761 sec = end % dos_sectors + 1;
762 if (cy > MAXCYL && C_flag == 0) {
763 printf("Warning: ending cylinder wraps, using all 1's\n");
764 partp->dp_ehd = -1;
765 partp->dp_ecyl = -1;
766 partp->dp_esect = -1;
767 } else {
768 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
769 partp->dp_ecyl = DOSCYL(cy);
770 partp->dp_esect = DOSSECT(sec, cy);
771 }
772 }
773
774 static void
775 erase_partition(int i)
776 {
777 struct dos_partition *partp;
778 off_t ioarg[2];
779
780 char sysctl_name[64];
781 int trim_enabled = 0;
782 size_t olen = sizeof(trim_enabled);
783 char *dev_name = strdup(disk);
784
785 dev_name = strtok(dev_name + strlen("/dev/da"),"s");
786 sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name);
787 if (sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0) < 0) {
788 printf("Device:%s does not support the TRIM command\n", disk);
789 usage();
790 }
791 if (!trim_enabled) {
792 printf("Erase device option selected, but sysctl (%s) "
793 "is not enabled\n",sysctl_name);
794 usage();
795 }
796 partp = ((struct dos_partition *) &mboot.parts) + i;
797 printf("erase sectors:%u %u\n",
798 partp->dp_start,
799 partp->dp_size);
800
801 /* Trim the Device */
802 ioarg[0] = partp->dp_start;
803 ioarg[0] *=secsize;
804 ioarg[1] = partp->dp_size;
805 ioarg[1] *=secsize;
806
807 if (ioctl(fd, IOCTLTRIM, ioarg) < 0) {
808 printf("Device trim failed\n");
809 usage ();
810 }
811 }
812
813 /* Getting device status */
814
815 static int
816 open_disk(void)
817 {
818 struct stat st;
819
820 if (stat(disk, &st) == -1) {
821 if (errno == ENOENT)
822 return -2;
823 warnx("can't get file status of %s", disk);
824 return -1;
825 }
826 if (!(st.st_mode & S_IFCHR) && p_flag == 0)
827 warnx("device %s is not character special", disk);
828 if ((fd = open(disk,
829 a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
830 if (errno == ENXIO)
831 return -2;
832 warnx("can't open device %s", disk);
833 return -1;
834 }
835 if (get_params() == -1) {
836 warnx("can't get disk parameters on %s", disk);
837 return -1;
838 }
839 return fd;
840 }
841
842 static ssize_t
843 read_disk(off_t sector, void *buf)
844 {
845 lseek(fd,(sector * 512), 0);
846 if (secsize == 0)
847 for(secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2)
848 {
849 /* try the read */
850 int size = read(fd, buf, secsize);
851 if (size == secsize)
852 /* it worked so return */
853 return secsize;
854 }
855 else
856 return read(fd, buf, secsize);
857
858 /* we failed to read at any of the sizes */
859 return -1;
860 }
861
862 static ssize_t
863 write_disk(off_t sector, void *buf)
864 {
865 lseek(fd,(sector * 512), 0);
866 /* write out in the size that the read_disk found worked */
867 return write(fd, buf, secsize);
868 }
869
870 static int
871 get_params(void)
872 {
873 struct partinfo partinfo; /* disk parameters */
874 struct stat st;
875
876 /*
877 * NOTE: When faking up the CHS for a file image (e.g. for USB),
878 * we must use max values. If we do not then an overflowed
879 * cylinder count will, by convention, set the CHS fields to
880 * all 1's. The heads and sectors in the CHS fields will then
881 * exceed the basic geometry which can cause BIOSes to brick.
882 */
883 if (ioctl(fd, DIOCGPART, &partinfo) == -1) {
884 if (p_flag && fstat(fd, &st) == 0 && st.st_size) {
885 sectors = MAX_SECTORS_PER_TRACK;
886 heads = MAX_HEADS;
887 cylsecs = heads * sectors;
888 cyls = st.st_size / 512 / cylsecs;
889 } else {
890 warnx("can't get disk parameters on %s; supplying dummy ones",
891 disk);
892 heads = 1;
893 cylsecs = heads * sectors;
894 }
895 } else {
896 cyls = partinfo.d_ncylinders;
897 heads = partinfo.d_nheads;
898 sectors = partinfo.d_secpertrack;
899 cylsecs = heads * sectors;
900 secsize = partinfo.media_blksize;
901 }
902 dos_cyls = cyls;
903 dos_heads = heads;
904 dos_sectors = sectors;
905 dos_cylsecs = cylsecs;
906 disksecs = (int64_t)cyls * heads * sectors;
907 return (disksecs);
908 }
909 \f
910
911 static int
912 read_s0(void)
913 {
914 mboot.bootinst_size = secsize;
915 if (mboot.bootinst != NULL)
916 free(mboot.bootinst);
917 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
918 warnx("unable to allocate buffer to read fdisk "
919 "partition table");
920 return -1;
921 }
922 if (read_disk(0, mboot.bootinst) == -1) {
923 warnx("can't read fdisk partition table");
924 return -1;
925 }
926 if (*(uint16_t *)&mboot.bootinst[DOSMAGICOFFSET] != BOOT_MAGIC) {
927 warnx("invalid fdisk partition table found");
928 /* So should we initialize things */
929 return -1;
930 }
931 memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts));
932 return 0;
933 }
934
935 static int
936 write_s0(void)
937 {
938 #ifdef NOT_NOW
939 int flag = 1;
940 #endif
941 int sector;
942
943 memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts));
944 /*
945 * write enable label sector before write (if necessary),
946 * disable after writing.
947 * needed if the disklabel protected area also protects
948 * sector 0. (e.g. empty disk)
949 */
950 #ifdef NOT_NOW
951 if (ioctl(fd, DIOCWLABEL, &flag) < 0)
952 warn("ioctl DIOCWLABEL");
953 #endif
954 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
955 if (write_disk(sector,
956 &mboot.bootinst[sector * secsize]) == -1) {
957 warn("can't write fdisk partition table");
958 #ifdef NOT_NOW
959 flag = 0;
960 ioctl(fd, DIOCWLABEL, &flag);
961 #endif
962 return -1;
963 }
964 #ifdef NOT_NOW
965 flag = 0;
966 ioctl(fd, DIOCWLABEL, &flag);
967 #endif
968 return(0);
969 }
970
971
972 static int
973 ok(const char *str)
974 {
975 printf("%s [n] ", str);
976 fflush(stdout);
977 if (fgets(lbuf, LBUF, stdin) == NULL)
978 exit(1);
979 lbuf[strlen(lbuf)-1] = 0;
980
981 if (*lbuf &&
982 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
983 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
984 return 1;
985 else
986 return 0;
987 }
988
989 static int
990 decimal(const char *str, int *num, int deflt)
991 {
992 int acc = 0, c;
993 char *cp;
994
995 while (1) {
996 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
997 fflush(stdout);
998 if (fgets(lbuf, LBUF, stdin) == NULL)
999 exit(1);
1000 lbuf[strlen(lbuf)-1] = 0;
1001
1002 if (!*lbuf)
1003 return 0;
1004
1005 cp = lbuf;
1006 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
1007 if (!c)
1008 return 0;
1009 while ((c = *cp++)) {
1010 if (c <= '9' && c >= '0')
1011 acc = acc * 10 + c - '0';
1012 else
1013 break;
1014 }
1015 if (c == ' ' || c == '\t')
1016 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
1017 if (!c) {
1018 *num = acc;
1019 return 1;
1020 } else
1021 printf("%s is an invalid decimal number. Try again.\n",
1022 lbuf);
1023 }
1024
1025 }
1026
1027 static const char *
1028 get_type(int type)
1029 {
1030 int numentries = (sizeof(part_types)/sizeof(struct part_type));
1031 int counter = 0;
1032 struct part_type *ptr = part_types;
1033
1034
1035 while(counter < numentries)
1036 {
1037 if (ptr->type == type)
1038 {
1039 return(ptr->name);
1040 }
1041 ptr++;
1042 counter++;
1043 }
1044 return("unknown");
1045 }
1046
1047
1048 static void
1049 parse_config_line(char *line, CMD *command)
1050 {
1051 char *cp, *end;
1052
1053 cp = line;
1054 while (1) /* dirty trick used to insure one exit point for this
1055 function */
1056 {
1057 memset(command, 0, sizeof(*command));
1058
1059 while (isspace(*cp)) ++cp;
1060 if (*cp == '\0' || *cp == '#')
1061 {
1062 break;
1063 }
1064 command->cmd = *cp++;
1065
1066 /*
1067 * Parse args
1068 */
1069 while (1)
1070 {
1071 while (isspace(*cp)) ++cp;
1072 if (*cp == '#')
1073 {
1074 break; /* found comment */
1075 }
1076 if (isalpha(*cp))
1077 {
1078 command->args[command->n_args].argtype = *cp++;
1079 }
1080 if (!isdigit(*cp))
1081 {
1082 break; /* assume end of line */
1083 }
1084 end = NULL;
1085 command->args[command->n_args].arg_val = strtoll(cp, &end, 0);
1086 if (cp == end)
1087 {
1088 break; /* couldn't parse number */
1089 }
1090 cp = end;
1091 command->n_args++;
1092 }
1093 break;
1094 }
1095 }
1096
1097
1098 static int
1099 process_geometry(CMD *command)
1100 {
1101 int status = 1, i;
1102
1103 while (1)
1104 {
1105 geom_processed = 1;
1106 if (part_processed)
1107 {
1108 warnx(
1109 "ERROR line %d: the geometry specification line must occur before\n\
1110 all partition specifications",
1111 current_line_number);
1112 status = 0;
1113 break;
1114 }
1115 if (command->n_args != 3)
1116 {
1117 warnx("ERROR line %d: incorrect number of geometry args",
1118 current_line_number);
1119 status = 0;
1120 break;
1121 }
1122 dos_cyls = -1;
1123 dos_heads = -1;
1124 dos_sectors = -1;
1125 for (i = 0; i < 3; ++i)
1126 {
1127 switch (command->args[i].argtype)
1128 {
1129 case 'c':
1130 dos_cyls = command->args[i].arg_val;
1131 break;
1132 case 'h':
1133 dos_heads = command->args[i].arg_val;
1134 break;
1135 case 's':
1136 dos_sectors = command->args[i].arg_val;
1137 break;
1138 default:
1139 warnx(
1140 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1141 current_line_number, command->args[i].argtype,
1142 command->args[i].argtype);
1143 status = 0;
1144 break;
1145 }
1146 }
1147 if (status == 0)
1148 {
1149 break;
1150 }
1151
1152 dos_cylsecs = dos_heads * dos_sectors;
1153
1154 /*
1155 * Do sanity checks on parameter values
1156 */
1157 if (dos_cyls < 0)
1158 {
1159 warnx("ERROR line %d: number of cylinders not specified",
1160 current_line_number);
1161 status = 0;
1162 }
1163 if (dos_cyls == 0 || dos_cyls > 1024)
1164 {
1165 warnx(
1166 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1167 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1168 is dedicated to DragonFly)",
1169 current_line_number, dos_cyls);
1170 }
1171
1172 if (dos_heads < 0)
1173 {
1174 warnx("ERROR line %d: number of heads not specified",
1175 current_line_number);
1176 status = 0;
1177 }
1178 else if (dos_heads < 1 || dos_heads > 256)
1179 {
1180 warnx("ERROR line %d: number of heads must be within (1-256)",
1181 current_line_number);
1182 status = 0;
1183 }
1184
1185 if (dos_sectors < 0)
1186 {
1187 warnx("ERROR line %d: number of sectors not specified",
1188 current_line_number);
1189 status = 0;
1190 }
1191 else if (dos_sectors < MIN_SECTORS_PER_TRACK || dos_sectors > MAX_SECTORS_PER_TRACK)
1192 {
1193 warnx("ERROR line %d: number of sectors must be within (1-63)",
1194 current_line_number);
1195 status = 0;
1196 }
1197
1198 break;
1199 }
1200 return (status);
1201 }
1202
1203
1204 static int
1205 process_partition(CMD *command)
1206 {
1207 int status = 0, part;
1208 uint32_t prev_head_boundary, prev_cyl_boundary;
1209 uint32_t adj_size, max_end;
1210 struct dos_partition *partp;
1211
1212 while (1)
1213 {
1214 part_processed = 1;
1215 if (command->n_args != 4)
1216 {
1217 warnx("ERROR line %d: incorrect number of partition args",
1218 current_line_number);
1219 break;
1220 }
1221 part = command->args[0].arg_val;
1222 if (part < 1 || part > 4)
1223 {
1224 warnx("ERROR line %d: invalid partition number %d",
1225 current_line_number, part);
1226 break;
1227 }
1228 partp = ((struct dos_partition *) &mboot.parts) + part - 1;
1229 bzero((char *)partp, sizeof (struct dos_partition));
1230 partp->dp_typ = command->args[1].arg_val;
1231 partp->dp_start = command->args[2].arg_val;
1232 partp->dp_size = command->args[3].arg_val;
1233 max_end = partp->dp_start + partp->dp_size;
1234
1235 if (partp->dp_typ == 0)
1236 {
1237 /*
1238 * Get out, the partition is marked as unused.
1239 */
1240 /*
1241 * Insure that it's unused.
1242 */
1243 bzero((char *)partp, sizeof (struct dos_partition));
1244 status = 1;
1245 break;
1246 }
1247
1248 /*
1249 * Adjust start upwards, if necessary, to fall on an head boundary.
1250 */
1251 if (partp->dp_start % dos_sectors != 0)
1252 {
1253 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors;
1254 if (max_end < (uint32_t)dos_sectors ||
1255 prev_head_boundary > max_end - dos_sectors)
1256 {
1257 /*
1258 * Can't go past end of partition
1259 */
1260 warnx(
1261 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1262 a head boundary",
1263 current_line_number, part);
1264 break;
1265 }
1266 warnx(
1267 "WARNING: adjusting start offset of partition %d\n\
1268 from %u to %u, to fall on a head boundary",
1269 part, (u_int)partp->dp_start,
1270 (u_int)(prev_head_boundary + dos_sectors));
1271 partp->dp_start = prev_head_boundary + dos_sectors;
1272 }
1273
1274 /*
1275 * Adjust size downwards, if necessary, to fall on a cylinder
1276 * boundary.
1277 */
1278 prev_cyl_boundary =
1279 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs;
1280 if (prev_cyl_boundary > partp->dp_start)
1281 adj_size = prev_cyl_boundary - partp->dp_start;
1282 else
1283 {
1284 warnx(
1285 "ERROR: could not adjust partition to start on a head boundary\n\
1286 and end on a cylinder boundary.");
1287 return (0);
1288 }
1289 if (adj_size != partp->dp_size)
1290 {
1291 warnx(
1292 "WARNING: adjusting size of partition %d from %u to %u\n\
1293 to end on a cylinder boundary",
1294 part, (u_int)partp->dp_size, (u_int)adj_size);
1295 partp->dp_size = adj_size;
1296 }
1297 if (partp->dp_size == 0)
1298 {
1299 warnx("ERROR line %d: size of partition %d is zero",
1300 current_line_number, part);
1301 break;
1302 }
1303
1304 dos(partp);
1305 status = 1;
1306 break;
1307 }
1308 return (status);
1309 }
1310
1311
1312 static int
1313 process_active(CMD *command)
1314 {
1315 int status = 0, part, i;
1316 struct dos_partition *partp;
1317
1318 while (1)
1319 {
1320 active_processed = 1;
1321 if (command->n_args != 1)
1322 {
1323 warnx("ERROR line %d: incorrect number of active args",
1324 current_line_number);
1325 status = 0;
1326 break;
1327 }
1328 part = command->args[0].arg_val;
1329 if (part < 1 || part > 4)
1330 {
1331 warnx("ERROR line %d: invalid partition number %d",
1332 current_line_number, part);
1333 break;
1334 }
1335 /*
1336 * Reset active partition
1337 */
1338 partp = ((struct dos_partition *) &mboot.parts);
1339 for (i = 0; i < NDOSPART; i++)
1340 partp[i].dp_flag = 0;
1341 partp[part-1].dp_flag = ACTIVE;
1342
1343 status = 1;
1344 break;
1345 }
1346 return (status);
1347 }
1348
1349
1350 static int
1351 process_line(char *line)
1352 {
1353 CMD command;
1354 int status = 1;
1355
1356 while (1)
1357 {
1358 parse_config_line(line, &command);
1359 switch (command.cmd)
1360 {
1361 case 0:
1362 /*
1363 * Comment or blank line
1364 */
1365 break;
1366 case 'g':
1367 /*
1368 * Set geometry
1369 */
1370 status = process_geometry(&command);
1371 break;
1372 case 'p':
1373 status = process_partition(&command);
1374 break;
1375 case 'a':
1376 status = process_active(&command);
1377 break;
1378 default:
1379 status = 0;
1380 break;
1381 }
1382 break;
1383 }
1384 return (status);
1385 }
1386
1387
1388 static int
1389 read_config(char *config_file)
1390 {
1391 FILE *fp = NULL;
1392 int status = 1;
1393 char buf[1010];
1394
1395 while (1) /* dirty trick used to insure one exit point for this
1396 function */
1397 {
1398 if (strcmp(config_file, "-") != 0)
1399 {
1400 /*
1401 * We're not reading from stdin
1402 */
1403 if ((fp = fopen(config_file, "r")) == NULL)
1404 {
1405 status = 0;
1406 break;
1407 }
1408 }
1409 else
1410 {
1411 fp = stdin;
1412 }
1413 current_line_number = 0;
1414 while (!feof(fp))
1415 {
1416 if (fgets(buf, sizeof(buf), fp) == NULL)
1417 {
1418 break;
1419 }
1420 ++current_line_number;
1421 status = process_line(buf);
1422 if (status == 0)
1423 {
1424 break;
1425 }
1426 }
1427 break;
1428 }
1429 if (fp)
1430 {
1431 /*
1432 * It doesn't matter if we're reading from stdin, as we've reached EOF
1433 */
1434 fclose(fp);
1435 }
1436 return (status);
1437 }
1438
1439
1440 static void
1441 reset_boot(void)
1442 {
1443 int i;
1444 struct dos_partition *partp;
1445
1446 init_boot();
1447 for (i = 0; i < 4; ++i)
1448 {
1449 partp = ((struct dos_partition *) &mboot.parts) + i;
1450 bzero((char *)partp, sizeof (struct dos_partition));
1451 }
1452 }
1453
1454 static int
1455 sanitize_partition(struct dos_partition *partp)
1456 {
1457 uint32_t prev_head_boundary, prev_cyl_boundary;
1458 uint32_t max_end, size, start;
1459
1460 start = partp->dp_start;
1461 size = partp->dp_size;
1462 max_end = start + size;
1463 /* Only allow a zero size if the partition is being marked unused. */
1464 if (size == 0) {
1465 if (start == 0 && partp->dp_typ == 0)
1466 return (1);
1467 warnx("ERROR: size of partition is zero");
1468 return (0);
1469 }
1470 /* Return if no adjustment is necessary. */
1471 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
1472 return (1);
1473
1474 if (start == 0) {
1475 warnx("WARNING: partition overlaps with partition table");
1476 if (ok("Correct this automatically?"))
1477 start = dos_sectors;
1478 }
1479 if (start % dos_sectors != 0)
1480 warnx("WARNING: partition does not start on a head boundary");
1481 if ((start +size) % dos_sectors != 0)
1482 warnx("WARNING: partition does not end on a cylinder boundary");
1483 warnx("WARNING: this may confuse the BIOS or some operating systems");
1484 if (!ok("Correct this automatically?"))
1485 return (1);
1486
1487 /*
1488 * Adjust start upwards, if necessary, to fall on an head boundary.
1489 */
1490 if (start % dos_sectors != 0) {
1491 prev_head_boundary = start / dos_sectors * dos_sectors;
1492 if (max_end < (uint32_t)dos_sectors ||
1493 prev_head_boundary >= max_end - dos_sectors) {
1494 /*
1495 * Can't go past end of partition
1496 */
1497 warnx(
1498 "ERROR: unable to adjust start of partition to fall on a head boundary");
1499 return (0);
1500 }
1501 start = prev_head_boundary + dos_sectors;
1502 }
1503
1504 /*
1505 * Adjust size downwards, if necessary, to fall on a cylinder
1506 * boundary.
1507 */
1508 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs;
1509 if (prev_cyl_boundary > start)
1510 size = prev_cyl_boundary - start;
1511 else {
1512 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1513 and end on a cylinder boundary.");
1514 return (0);
1515 }
1516
1517 /* Finally, commit any changes to partp and return. */
1518 if (start != partp->dp_start) {
1519 warnx("WARNING: adjusting start offset of partition to %u",
1520 (u_int)start);
1521 partp->dp_start = start;
1522 }
1523 if (size != partp->dp_size) {
1524 warnx("WARNING: adjusting size of partition to %u", (u_int)size);
1525 partp->dp_size = size;
1526 }
1527
1528 return (1);
1529 }
DragonFly BSD