fdisk, gpt - Support trim on recent kernels
[dragonfly.git] / sbin / fdisk / fdisk.c
CommitLineData
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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.
1de703da 25 *
a570def4 26 * $FreeBSD: /repoman/r/ncvs/src/sbin/i386/fdisk/fdisk.c,v 1.36.2.14 2004/01/30 14:40:47 harti Exp $
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27 */
28
a77a893a 29#include <sys/param.h>
bb9741ff 30#include <sys/diskslice.h>
6af3b87d 31#include <sys/diskmbr.h>
e0fb398b 32#include <sys/sysctl.h>
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33#include <sys/stat.h>
34#include <ctype.h>
35#include <fcntl.h>
36#include <err.h>
d736a600 37#include <fstab.h>
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38#include <errno.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
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44#include <bus/cam/scsi/scsi_daio.h>
45
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46#define LBUF 100
47static char lbuf[LBUF];
48
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49/*
50 *
51 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
52 *
53 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
54 * Copyright (c) 1989 Robert. V. Baron
55 * Created.
56 */
57
58#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
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59#define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
60#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
61#define MAX_SECTORS_PER_TRACK 0x3f /* maximum number of sectors per track */
62#define MIN_SECTORS_PER_TRACK 0x1 /* minimum number of sectors per track */
63#define MAX_HEADS 0xff /* maximum number of head */
64static int secsize = 0; /* the sensed sector size */
65
66static int fd; /* file descriptor of the given disk */
67static const char *disk;
68static const char *disks[] =
984263bc 69{
908eb1e8 70 "/dev/ad0", "/dev/da0", "/dev/vkd0", 0
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71};
72
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73static int cyls, sectors, heads, cylsecs;
74static int64_t disksecs;
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75
76struct mboot
77{
78 unsigned char padding[2]; /* force the longs to be long aligned */
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79 unsigned char *bootinst; /* boot code */
80 off_t bootinst_size;
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81 struct dos_partition parts[4];
82};
6a0b5de0 83static struct mboot mboot;
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84
85#define ACTIVE 0x80
86#define BOOT_MAGIC 0xAA55
87
88int dos_cyls;
89int dos_heads;
90int dos_sectors;
91int dos_cylsecs;
92
6a0b5de0 93#define DOSSECT(s,c) ((s & MAX_SECTORS_PER_TRACK) | ((c >> 2) & 0xc0))
984263bc 94#define DOSCYL(c) (c & 0xff)
b13267a5 95#define MAXCYL 1023
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96static int partition = -1;
97
984263bc 98#define MAX_ARGS 10
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99static int current_line_number;
100
101static int geom_processed = 0;
102static int part_processed = 0;
103static int active_processed = 0;
104
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105typedef struct cmd {
106 char cmd;
107 int n_args;
108 struct arg {
109 char argtype;
82675d28 110 long long arg_val;
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111 } args[MAX_ARGS];
112} CMD;
113
984263bc 114static int B_flag = 0; /* replace boot code */
b13267a5 115static int C_flag = 0; /* use wrapped values for CHS */
e0fb398b 116static int E_flag = 0; /* Erase through TRIM */
b52f4e19 117static int I_flag = 0; /* use entire disk for DragonFly */
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118static int a_flag = 0; /* set active partition */
119static char *b_flag = NULL; /* path to boot code */
120static int i_flag = 0; /* replace partition data */
121static int u_flag = 0; /* update partition data */
53819cf0 122static int p_flag = 0; /* operate on a disk image file */
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123static int s_flag = 0; /* Print a summary and exit */
124static int t_flag = 0; /* test only */
125static char *f_flag = NULL; /* Read config info from file */
126static int v_flag = 0; /* Be verbose */
127
128struct part_type
129{
130 unsigned char type;
1b0b5697 131 const char *name;
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132}part_types[] =
133{
134 {0x00, "unused"}
135 ,{0x01, "Primary DOS with 12 bit FAT"}
136 ,{0x02, "XENIX / filesystem"}
137 ,{0x03, "XENIX /usr filesystem"}
138 ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"}
139 ,{0x05, "Extended DOS"}
140 ,{0x06, "Primary 'big' DOS (> 32MB)"}
141 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
142 ,{0x08, "AIX filesystem"}
143 ,{0x09, "AIX boot partition or Coherent"}
144 ,{0x0A, "OS/2 Boot Manager or OPUS"}
145 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
146 ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"}
147 ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"}
148 ,{0x0F, "Extended DOS, LBA"}
149 ,{0x10, "OPUS"}
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150 ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
151 ,{0x12, "Compaq diagnostics"}
152 ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
153 ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
154 ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
155 ,{0x18, "AST Windows swapfile"}
156 ,{0x24, "NEC DOS"}
984263bc 157 ,{0x39, "plan9"}
8a8f3769 158 ,{0x3C, "PartitionMagic recovery"}
984263bc 159 ,{0x40, "VENIX 286"}
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160 ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"}
161 ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"}
162 ,{0x43, "Linux native (sharing disk with DRDOS)"}
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163 ,{0x4D, "QNX 4.2 Primary"}
164 ,{0x4E, "QNX 4.2 Secondary"}
165 ,{0x4F, "QNX 4.2 Tertiary"}
166 ,{0x50, "DM"}
167 ,{0x51, "DM"}
168 ,{0x52, "CP/M or Microport SysV/AT"}
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169 ,{0x53, "DM6 Aux3"}
170 ,{0x54, "DM6"}
171 ,{0x55, "EZ-Drive (disk manager)"}
984263bc 172 ,{0x56, "GB"}
8a8f3769 173 ,{0x5C, "Priam Edisk (disk manager)"} /* according to S. Widlake */
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174 ,{0x61, "Speed"}
175 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
176 ,{0x64, "Novell Netware 2.xx"}
177 ,{0x65, "Novell Netware 3.xx"}
794d80aa 178 ,{0x6C, "DragonFlyBSD"}
8a8f3769 179 ,{0x70, "DiskSecure Multi-Boot"}
984263bc 180 ,{0x75, "PCIX"}
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181 ,{0x77, "QNX4.x"}
182 ,{0x78, "QNX4.x 2nd part"}
183 ,{0x79, "QNX4.x 3rd part"}
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184 ,{0x80, "Minix 1.1 ... 1.4a"}
185 ,{0x81, "Minix 1.4b ... 1.5.10"}
186 ,{0x82, "Linux swap or Solaris x86"}
187 ,{0x83, "Linux filesystem"}
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188 ,{0x84, "OS/2 hidden C: drive"}
189 ,{0x85, "Linux extended"}
190 ,{0x86, "NTFS volume set??"}
191 ,{0x87, "NTFS volume set??"}
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192 ,{0x93, "Amoeba filesystem"}
193 ,{0x94, "Amoeba bad block table"}
194 ,{0x9F, "BSD/OS"}
195 ,{0xA0, "Suspend to Disk"}
b52f4e19 196 ,{0xA5, "DragonFly/FreeBSD/NetBSD/386BSD"}
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197 ,{0xA6, "OpenBSD"}
198 ,{0xA7, "NEXTSTEP"}
199 ,{0xA9, "NetBSD"}
8a8f3769 200 ,{0xAC, "IBM JFS"}
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201 ,{0xB7, "BSDI BSD/386 filesystem"}
202 ,{0xB8, "BSDI BSD/386 swap"}
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203 ,{0xBE, "Solaris x86 boot"}
204 ,{0xC1, "DRDOS/sec with 12-bit FAT"}
205 ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"}
206 ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"}
207 ,{0xC7, "Syrinx"}
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208 ,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
209 ,{0xE1, "Speed"}
210 ,{0xE3, "Speed"}
211 ,{0xE4, "Speed"}
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212 ,{0xEB, "BeOS file system"}
213 ,{0xEE, "EFI GPT"}
214 ,{0xEF, "EFI System Partition"}
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215 ,{0xF1, "Speed"}
216 ,{0xF2, "DOS 3.3+ Secondary"}
217 ,{0xF4, "Speed"}
8a8f3769 218 ,{0xFE, "SpeedStor >1024 cyl. or LANstep"}
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219 ,{0xFF, "BBT (Bad Blocks Table)"}
220};
221
222static void print_s0(int which);
223static void print_part(int i);
224static void init_sector0(unsigned long start);
225static void init_boot(void);
226static void change_part(int i);
1b0b5697 227static void print_params(void);
984263bc 228static void change_active(int which);
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229static void change_code(void);
230static void get_params_to_use(void);
984263bc 231static void dos(struct dos_partition *partp);
1b0b5697 232static int open_disk(void);
e0fb398b 233static void erase_partition(int i);
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234static ssize_t read_disk(off_t sector, void *buf);
235static ssize_t write_disk(off_t sector, void *buf);
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236static int get_params(void);
237static int read_s0(void);
238static int write_s0(void);
239static int ok(const char *str);
240static int decimal(const char *str, int *num, int deflt);
241static const char *get_type(int type);
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242static int read_config(char *config_file);
243static void reset_boot(void);
244static int sanitize_partition(struct dos_partition *);
245static void usage(void);
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246
247int
248main(int argc, char *argv[])
249{
250 int c, i;
251
e0fb398b 252 while ((c = getopt(argc, argv, "BCEIab:f:p:istuv1234")) != -1)
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253 switch (c) {
254 case 'B':
255 B_flag = 1;
256 break;
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257 case 'C':
258 C_flag = 1;
259 break;
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260 case 'E':
261 E_flag = 1;
262 break;
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263 case 'I':
264 I_flag = 1;
265 break;
266 case 'a':
267 a_flag = 1;
268 break;
269 case 'b':
270 b_flag = optarg;
271 break;
272 case 'f':
273 f_flag = optarg;
274 break;
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275 case 'p':
276 disk = optarg;
277 p_flag = 1;
278 break;
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279 case 'i':
280 i_flag = 1;
281 break;
282 case 's':
283 s_flag = 1;
284 break;
285 case 't':
286 t_flag = 1;
287 break;
288 case 'u':
289 u_flag = 1;
290 break;
291 case 'v':
292 v_flag = 1;
293 break;
294 case '1':
295 case '2':
296 case '3':
297 case '4':
298 partition = c - '0';
299 break;
300 default:
301 usage();
302 }
303 if (f_flag || i_flag)
304 u_flag = 1;
305 if (t_flag)
306 v_flag = 1;
307 argc -= optind;
308 argv += optind;
309
53819cf0 310 if (argc > 0) {
d736a600 311 disk = getdevpath(argv[0], 0);
1b0b5697 312 if (open_disk() < 0)
984263bc 313 err(1, "cannot open disk %s", disk);
53819cf0 314 } else if (disk == NULL) {
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315 int rv = 0;
316
317 for(i = 0; disks[i]; i++)
318 {
319 disk = disks[i];
1b0b5697 320 rv = open_disk();
6a0b5de0 321 if (rv != -2) break;
984263bc 322 }
6a0b5de0 323 if (rv < 0)
984263bc 324 err(1, "cannot open any disk");
53819cf0 325 } else {
1b0b5697 326 if (open_disk() < 0)
53819cf0 327 err(1, "cannot open disk %s", disk);
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328 }
329
330 /* (abu)use mboot.bootinst to probe for the sector size */
331 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
332 err(1, "cannot allocate buffer to determine disk sector size");
333 read_disk(0, mboot.bootinst);
334 free(mboot.bootinst);
335 mboot.bootinst = NULL;
336
337 if (s_flag)
338 {
1b0b5697 339 int j;
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340 struct dos_partition *partp;
341
342 if (read_s0())
343 err(1, "read_s0");
344 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
345 dos_sectors);
346 printf("Part %11s %11s Type Flags\n", "Start", "Size");
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347 for (j = 0; j < NDOSPART; j++) {
348 partp = ((struct dos_partition *) &mboot.parts) + j;
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349 if (partp->dp_start == 0 && partp->dp_size == 0)
350 continue;
1b0b5697 351 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", j + 1,
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352 (u_long) partp->dp_start,
353 (u_long) partp->dp_size, partp->dp_typ,
354 partp->dp_flag);
355 }
356 exit(0);
357 }
358
359 printf("******* Working on device %s *******\n",disk);
360
361 if (I_flag)
362 {
363 struct dos_partition *partp;
364
365 read_s0();
366 reset_boot();
367 partp = (struct dos_partition *) (&mboot.parts[0]);
794d80aa 368 partp->dp_typ = DOSPTYP_DFLYBSD;
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369 partp->dp_flag = ACTIVE;
370 partp->dp_start = dos_sectors;
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371 if (disksecs - dos_sectors > 0xFFFFFFFFU) {
372 printf("Warning: Ending logical block > 2TB, using max value\n");
373 partp->dp_size = 0xFFFFFFFFU;
374 } else {
375 partp->dp_size = (disksecs / dos_cylsecs) *
376 dos_cylsecs - dos_sectors;
377 }
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378 dos(partp);
379 if (v_flag)
380 print_s0(-1);
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381
382 if (E_flag) {
383 /* Trim now if we're using the entire device */
384 erase_partition(0);
385 }
386
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387 if (!t_flag)
388 write_s0();
389 exit(0);
390 }
391 if (f_flag)
392 {
393 if (read_s0() || i_flag)
394 {
395 reset_boot();
396 }
397
398 if (!read_config(f_flag))
399 {
400 exit(1);
401 }
402 if (v_flag)
403 {
404 print_s0(-1);
405 }
406 if (!t_flag)
407 {
408 write_s0();
409 }
410 }
411 else
412 {
6a0b5de0 413 if (u_flag)
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414 {
415 get_params_to_use();
416 }
417 else
418 {
419 print_params();
420 }
421
422 if (read_s0())
423 init_sector0(dos_sectors);
424
425 printf("Media sector size is %d\n", secsize);
426 printf("Warning: BIOS sector numbering starts with sector 1\n");
427 printf("Information from DOS bootblock is:\n");
428 if (partition == -1)
429 for (i = 1; i <= NDOSPART; i++)
430 change_part(i);
431 else
432 change_part(partition);
433
434 if (u_flag || a_flag)
435 change_active(partition);
436
437 if (B_flag)
438 change_code();
439
440 if (u_flag || a_flag || B_flag) {
441 if (!t_flag) {
442 printf("\nWe haven't changed the partition table yet. ");
443 printf("This is your last chance.\n");
444 }
445 print_s0(-1);
446 if (!t_flag) {
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447 if (ok("Should we write new partition table?")) {
448 if (E_flag && u_flag) {
449 /*
450 * Trim now because we've committed to
451 * updating the partition.
452 */
453 if (partition == -1)
454 for (i = 0; i < NDOSPART; i++)
455 erase_partition(i);
456 else
457 erase_partition(partition);
458 }
984263bc 459 write_s0();
e0fb398b 460 }
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461 }
462 else
463 {
464 printf("\n-t flag specified -- partition table not written.\n");
465 }
466 }
467 }
468
469 exit(0);
470}
471
472static void
d2fd3c6a 473usage(void)
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474{
475 fprintf(stderr, "%s%s",
7b8c2c90 476 "usage: fdisk [-BCEIaistu] [-b bootcode] [-p diskimage] [-1234] [disk]\n",
fca180e3 477 " fdisk -f configfile [-itv] [disk]\n");
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478 exit(1);
479}
480
481static void
482print_s0(int which)
483{
d2fd3c6a 484 int i;
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485
486 print_params();
487 printf("Information from DOS bootblock is:\n");
488 if (which == -1)
489 for (i = 1; i <= NDOSPART; i++)
490 printf("%d: ", i), print_part(i);
491 else
492 print_part(which);
493}
494
495static struct dos_partition mtpart = { 0 };
496
497static void
498print_part(int i)
499{
500 struct dos_partition *partp;
1b0b5697 501 uint64_t part_mb;
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502
503 partp = ((struct dos_partition *) &mboot.parts) + i - 1;
504
505 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
506 printf("<UNUSED>\n");
507 return;
508 }
509 /*
510 * Be careful not to overflow.
511 */
512 part_mb = partp->dp_size;
513 part_mb *= secsize;
514 part_mb /= (1024 * 1024);
515 printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
a276dc6b 516 printf(" start %lu, size %lu (%jd Meg), flag %x%s\n",
984263bc 517 (u_long)partp->dp_start,
fca180e3 518 (u_long)partp->dp_size,
a276dc6b 519 (intmax_t)part_mb,
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520 partp->dp_flag,
521 partp->dp_flag == ACTIVE ? " (active)" : "");
522 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
523 ,DPCYL(partp->dp_scyl, partp->dp_ssect)
524 ,partp->dp_shd
525 ,DPSECT(partp->dp_ssect)
526 ,DPCYL(partp->dp_ecyl, partp->dp_esect)
527 ,partp->dp_ehd
528 ,DPSECT(partp->dp_esect));
529}
530
531
532static void
533init_boot(void)
534{
535 const char *fname;
6a0b5de0 536 int boot_fd, n;
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537 struct stat sb;
538
539 fname = b_flag ? b_flag : "/boot/mbr";
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540 if ((boot_fd = open(fname, O_RDONLY)) == -1 ||
541 fstat(boot_fd, &sb) == -1)
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542 err(1, "%s", fname);
543 if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
544 errx(1, "%s: length must be a multiple of sector size", fname);
545 if (mboot.bootinst != NULL)
546 free(mboot.bootinst);
547 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
548 errx(1, "%s: unable to allocate read buffer", fname);
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549 if ((n = read(boot_fd, mboot.bootinst, mboot.bootinst_size)) == -1 ||
550 close(boot_fd))
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551 err(1, "%s", fname);
552 if (n != mboot.bootinst_size)
553 errx(1, "%s: short read", fname);
554}
555
556
557static void
558init_sector0(unsigned long start)
559{
560struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]);
561
562 init_boot();
563
794d80aa 564 partp->dp_typ = DOSPTYP_DFLYBSD;
984263bc 565 partp->dp_flag = ACTIVE;
a77a893a 566 start = roundup(start, dos_sectors);
6a0b5de0 567 if (start == 0)
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568 start = dos_sectors;
569 partp->dp_start = start;
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570 if (disksecs - start > 0xFFFFFFFFU) {
571 printf("Warning: Ending logical block > 2TB, using max value\n");
572 partp->dp_size = 0xFFFFFFFFU;
573 } else {
574 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
575 }
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576
577 dos(partp);
578}
579
580static void
581change_part(int i)
582{
583struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1;
584
585 printf("The data for partition %d is:\n", i);
586 print_part(i);
587
588 if (u_flag && ok("Do you want to change it?")) {
589 int tmp;
590
591 if (i_flag) {
592 bzero((char *)partp, sizeof (struct dos_partition));
593 if (i == 4) {
594 init_sector0(1);
595 printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n");
596 print_part(i);
597 }
598 }
599
600 do {
b52f4e19 601 Decimal("sysid (165=DragonFly)", partp->dp_typ, tmp);
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602 Decimal("start", partp->dp_start, tmp);
603 Decimal("size", partp->dp_size, tmp);
604 if (!sanitize_partition(partp)) {
605 warnx("ERROR: failed to adjust; setting sysid to 0");
606 partp->dp_typ = 0;
607 }
608
609 if (ok("Explicitly specify beg/end address ?"))
610 {
611 int tsec,tcyl,thd;
612 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
613 thd = partp->dp_shd;
614 tsec = DPSECT(partp->dp_ssect);
615 Decimal("beginning cylinder", tcyl, tmp);
616 Decimal("beginning head", thd, tmp);
617 Decimal("beginning sector", tsec, tmp);
b13267a5
MD
618 if (tcyl > MAXCYL && C_flag == 0) {
619 printf("Warning: starting cylinder wraps, using all 1's\n");
620 partp->dp_scyl = -1;
621 partp->dp_ssect = -1;
622 partp->dp_shd = -1;
623 } else {
624 partp->dp_scyl = DOSCYL(tcyl);
625 partp->dp_ssect = DOSSECT(tsec,tcyl);
626 partp->dp_shd = thd;
627 }
984263bc
MD
628
629 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
630 thd = partp->dp_ehd;
631 tsec = DPSECT(partp->dp_esect);
632 Decimal("ending cylinder", tcyl, tmp);
633 Decimal("ending head", thd, tmp);
634 Decimal("ending sector", tsec, tmp);
b13267a5
MD
635 if (tcyl > MAXCYL && C_flag == 0) {
636 printf("Warning: ending cylinder wraps, using all 1's\n");
637 partp->dp_ecyl = -1;
638 partp->dp_esect = -1;
639 partp->dp_ehd = -1;
640 } else {
641 partp->dp_ecyl = DOSCYL(tcyl);
642 partp->dp_esect = DOSSECT(tsec,tcyl);
643 partp->dp_ehd = thd;
644 }
984263bc
MD
645 } else
646 dos(partp);
647
648 print_part(i);
649 } while (!ok("Are we happy with this entry?"));
650 }
651}
652
653static void
b5744197 654print_params(void)
984263bc 655{
bb9741ff 656 printf("parameters extracted from device are:\n");
984263bc
MD
657 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
658 ,cyls,heads,sectors,cylsecs);
6a0b5de0 659 if ((dos_sectors > MAX_SECTORS_PER_TRACK) || (dos_cyls > MAXCYL) || (dos_heads > MAX_HEADS))
984263bc
MD
660 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
661 printf("parameters to be used for BIOS calculations are:\n");
662 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
663 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
664}
665
666static void
667change_active(int which)
668{
669 struct dos_partition *partp = &mboot.parts[0];
670 int active, i, new, tmp;
671
672 active = -1;
673 for (i = 0; i < NDOSPART; i++) {
674 if ((partp[i].dp_flag & ACTIVE) == 0)
675 continue;
676 printf("Partition %d is marked active\n", i + 1);
677 if (active == -1)
678 active = i + 1;
679 }
680 if (a_flag && which != -1)
681 active = which;
682 else if (active == -1)
683 active = 1;
684
685 if (!ok("Do you want to change the active partition?"))
686 return;
687setactive:
688 do {
689 new = active;
690 Decimal("active partition", new, tmp);
691 if (new < 1 || new > 4) {
692 printf("Active partition number must be in range 1-4."
693 " Try again.\n");
694 goto setactive;
695 }
696 active = new;
697 } while (!ok("Are you happy with this choice"));
698 for (i = 0; i < NDOSPART; i++)
699 partp[i].dp_flag = 0;
700 if (active > 0 && active <= NDOSPART)
701 partp[active-1].dp_flag = ACTIVE;
702}
703
704static void
b5744197 705change_code(void)
984263bc
MD
706{
707 if (ok("Do you want to change the boot code?"))
708 init_boot();
709}
710
711void
b5744197 712get_params_to_use(void)
984263bc
MD
713{
714 int tmp;
715 print_params();
716 if (ok("Do you want to change our idea of what BIOS thinks ?"))
717 {
718 do
719 {
720 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
721 Decimal("BIOS's idea of #heads", dos_heads, tmp);
722 Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
723 dos_cylsecs = dos_heads * dos_sectors;
724 print_params();
725 }
726 while(!ok("Are you happy with this choice"));
727 }
728}
729
730
731/***********************************************\
732* Change real numbers into strange dos numbers *
733\***********************************************/
734static void
d2fd3c6a 735dos(struct dos_partition *partp)
984263bc
MD
736{
737 int cy, sec;
1b0b5697 738 uint32_t end;
984263bc
MD
739
740 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
741 memcpy(partp, &mtpart, sizeof(*partp));
742 return;
743 }
744
745 /* Start c/h/s. */
984263bc
MD
746 cy = partp->dp_start / dos_cylsecs;
747 sec = partp->dp_start % dos_sectors + 1;
b13267a5
MD
748 if (cy > MAXCYL && C_flag == 0) {
749 printf("Warning: starting cylinder wraps, using all 1's\n");
750 partp->dp_shd = -1;
751 partp->dp_scyl = -1;
752 partp->dp_ssect = -1;
753 } else {
754 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
755 partp->dp_scyl = DOSCYL(cy);
756 partp->dp_ssect = DOSSECT(sec, cy);
757 }
984263bc
MD
758
759 /* End c/h/s. */
760 end = partp->dp_start + partp->dp_size - 1;
984263bc
MD
761 cy = end / dos_cylsecs;
762 sec = end % dos_sectors + 1;
b13267a5
MD
763 if (cy > MAXCYL && C_flag == 0) {
764 printf("Warning: ending cylinder wraps, using all 1's\n");
765 partp->dp_ehd = -1;
766 partp->dp_ecyl = -1;
767 partp->dp_esect = -1;
768 } else {
769 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
770 partp->dp_ecyl = DOSCYL(cy);
771 partp->dp_esect = DOSSECT(sec, cy);
772 }
984263bc
MD
773}
774
e0fb398b
T
775static void
776erase_partition(int i)
777{
778 struct dos_partition *partp;
779 off_t ioarg[2];
780
e0fb398b
T
781 char *dev_name = strdup(disk);
782
783 dev_name = strtok(dev_name + strlen("/dev/da"),"s");
d9306807
MD
784#if 0
785 int trim_enabled = 0;
786 char sysctl_name[64];
787 size_t olen = sizeof(trim_enabled);
788
e0fb398b 789 sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name);
088b2e68 790 if (sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0) < 0) {
e0fb398b
T
791 printf("Device:%s does not support the TRIM command\n", disk);
792 usage();
793 }
6a0b5de0 794 if (!trim_enabled) {
e0fb398b
T
795 printf("Erase device option selected, but sysctl (%s) "
796 "is not enabled\n",sysctl_name);
797 usage();
798 }
d9306807 799#endif
e0fb398b
T
800 partp = ((struct dos_partition *) &mboot.parts) + i;
801 printf("erase sectors:%u %u\n",
802 partp->dp_start,
803 partp->dp_size);
804
805 /* Trim the Device */
806 ioarg[0] = partp->dp_start;
807 ioarg[0] *=secsize;
808 ioarg[1] = partp->dp_size;
809 ioarg[1] *=secsize;
810
32506cfa 811 if (ioctl(fd, DAIOCTRIM, ioarg) < 0) {
e0fb398b
T
812 printf("Device trim failed\n");
813 usage ();
814 }
815}
816
984263bc
MD
817 /* Getting device status */
818
819static int
1b0b5697 820open_disk(void)
984263bc
MD
821{
822 struct stat st;
823
824 if (stat(disk, &st) == -1) {
825 if (errno == ENOENT)
826 return -2;
827 warnx("can't get file status of %s", disk);
828 return -1;
829 }
6a0b5de0 830 if (!(st.st_mode & S_IFCHR) && p_flag == 0)
984263bc
MD
831 warnx("device %s is not character special", disk);
832 if ((fd = open(disk,
833 a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
6a0b5de0 834 if (errno == ENXIO)
984263bc
MD
835 return -2;
836 warnx("can't open device %s", disk);
837 return -1;
838 }
53819cf0 839 if (get_params() == -1) {
984263bc
MD
840 warnx("can't get disk parameters on %s", disk);
841 return -1;
842 }
843 return fd;
844}
845
846static ssize_t
847read_disk(off_t sector, void *buf)
848{
849 lseek(fd,(sector * 512), 0);
6a0b5de0
AK
850 if (secsize == 0)
851 for(secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2)
984263bc
MD
852 {
853 /* try the read */
854 int size = read(fd, buf, secsize);
6a0b5de0 855 if (size == secsize)
984263bc
MD
856 /* it worked so return */
857 return secsize;
858 }
859 else
6a0b5de0 860 return read(fd, buf, secsize);
984263bc
MD
861
862 /* we failed to read at any of the sizes */
863 return -1;
864}
865
866static ssize_t
867write_disk(off_t sector, void *buf)
868{
869 lseek(fd,(sector * 512), 0);
870 /* write out in the size that the read_disk found worked */
871 return write(fd, buf, secsize);
872}
873
874static int
b5744197 875get_params(void)
984263bc 876{
bb9741ff 877 struct partinfo partinfo; /* disk parameters */
53819cf0 878 struct stat st;
984263bc 879
8155d676
MD
880 /*
881 * NOTE: When faking up the CHS for a file image (e.g. for USB),
882 * we must use max values. If we do not then an overflowed
883 * cylinder count will, by convention, set the CHS fields to
884 * all 1's. The heads and sectors in the CHS fields will then
885 * exceed the basic geometry which can cause BIOSes to brick.
886 */
bb9741ff 887 if (ioctl(fd, DIOCGPART, &partinfo) == -1) {
53819cf0 888 if (p_flag && fstat(fd, &st) == 0 && st.st_size) {
6a0b5de0
AK
889 sectors = MAX_SECTORS_PER_TRACK;
890 heads = MAX_HEADS;
53819cf0
MD
891 cylsecs = heads * sectors;
892 cyls = st.st_size / 512 / cylsecs;
893 } else {
bb9741ff
MD
894 warnx("can't get disk parameters on %s; supplying dummy ones",
895 disk);
53819cf0 896 heads = 1;
53819cf0
MD
897 cylsecs = heads * sectors;
898 }
899 } else {
bb9741ff
MD
900 cyls = partinfo.d_ncylinders;
901 heads = partinfo.d_nheads;
902 sectors = partinfo.d_secpertrack;
53819cf0 903 cylsecs = heads * sectors;
f946e8c1 904 secsize = partinfo.media_blksize;
984263bc 905 }
53819cf0
MD
906 dos_cyls = cyls;
907 dos_heads = heads;
908 dos_sectors = sectors;
909 dos_cylsecs = cylsecs;
5ded848a 910 disksecs = (int64_t)cyls * heads * sectors;
984263bc
MD
911 return (disksecs);
912}
913\f
914
915static int
b5744197 916read_s0(void)
984263bc
MD
917{
918 mboot.bootinst_size = secsize;
919 if (mboot.bootinst != NULL)
920 free(mboot.bootinst);
921 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
922 warnx("unable to allocate buffer to read fdisk "
923 "partition table");
924 return -1;
925 }
926 if (read_disk(0, mboot.bootinst) == -1) {
927 warnx("can't read fdisk partition table");
928 return -1;
929 }
6a0b5de0 930 if (*(uint16_t *)&mboot.bootinst[DOSMAGICOFFSET] != BOOT_MAGIC) {
984263bc
MD
931 warnx("invalid fdisk partition table found");
932 /* So should we initialize things */
933 return -1;
934 }
935 memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts));
936 return 0;
937}
938
939static int
b5744197 940write_s0(void)
984263bc
MD
941{
942#ifdef NOT_NOW
6a0b5de0 943 int flag = 1;
984263bc
MD
944#endif
945 int sector;
946
984263bc
MD
947 memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts));
948 /*
949 * write enable label sector before write (if necessary),
950 * disable after writing.
951 * needed if the disklabel protected area also protects
952 * sector 0. (e.g. empty disk)
953 */
954#ifdef NOT_NOW
984263bc
MD
955 if (ioctl(fd, DIOCWLABEL, &flag) < 0)
956 warn("ioctl DIOCWLABEL");
957#endif
fca180e3 958 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
984263bc
MD
959 if (write_disk(sector,
960 &mboot.bootinst[sector * secsize]) == -1) {
961 warn("can't write fdisk partition table");
984263bc
MD
962#ifdef NOT_NOW
963 flag = 0;
7cee7052 964 ioctl(fd, DIOCWLABEL, &flag);
984263bc 965#endif
6a0b5de0 966 return -1;
984263bc
MD
967 }
968#ifdef NOT_NOW
969 flag = 0;
7cee7052 970 ioctl(fd, DIOCWLABEL, &flag);
984263bc
MD
971#endif
972 return(0);
973}
974
975
976static int
1b0b5697 977ok(const char *str)
984263bc
MD
978{
979 printf("%s [n] ", str);
980 fflush(stdout);
981 if (fgets(lbuf, LBUF, stdin) == NULL)
982 exit(1);
983 lbuf[strlen(lbuf)-1] = 0;
984
985 if (*lbuf &&
986 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
987 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
988 return 1;
989 else
990 return 0;
991}
992
993static int
1b0b5697 994decimal(const char *str, int *num, int deflt)
984263bc 995{
6a0b5de0
AK
996 int acc = 0, c;
997 char *cp;
984263bc
MD
998
999 while (1) {
1000 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
1001 fflush(stdout);
1002 if (fgets(lbuf, LBUF, stdin) == NULL)
1003 exit(1);
1004 lbuf[strlen(lbuf)-1] = 0;
1005
1006 if (!*lbuf)
1007 return 0;
1008
1009 cp = lbuf;
1010 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
1011 if (!c)
1012 return 0;
1013 while ((c = *cp++)) {
1014 if (c <= '9' && c >= '0')
1015 acc = acc * 10 + c - '0';
1016 else
1017 break;
1018 }
1019 if (c == ' ' || c == '\t')
1020 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
1021 if (!c) {
1022 *num = acc;
1023 return 1;
1024 } else
1025 printf("%s is an invalid decimal number. Try again.\n",
1026 lbuf);
1027 }
1028
1029}
1030
1b0b5697 1031static const char *
984263bc
MD
1032get_type(int type)
1033{
e62ef63c 1034 int numentries = NELEM(part_types);
984263bc
MD
1035 int counter = 0;
1036 struct part_type *ptr = part_types;
1037
1038
1039 while(counter < numentries)
1040 {
6a0b5de0 1041 if (ptr->type == type)
984263bc
MD
1042 {
1043 return(ptr->name);
1044 }
1045 ptr++;
1046 counter++;
1047 }
1048 return("unknown");
1049}
1050
1051
1052static void
d2fd3c6a 1053parse_config_line(char *line, CMD *command)
984263bc
MD
1054{
1055 char *cp, *end;
1056
1057 cp = line;
1058 while (1) /* dirty trick used to insure one exit point for this
1059 function */
1060 {
1061 memset(command, 0, sizeof(*command));
1062
1063 while (isspace(*cp)) ++cp;
1064 if (*cp == '\0' || *cp == '#')
1065 {
1066 break;
1067 }
1068 command->cmd = *cp++;
1069
1070 /*
1071 * Parse args
1072 */
1073 while (1)
1074 {
1075 while (isspace(*cp)) ++cp;
1076 if (*cp == '#')
1077 {
1078 break; /* found comment */
1079 }
1080 if (isalpha(*cp))
1081 {
1082 command->args[command->n_args].argtype = *cp++;
1083 }
1084 if (!isdigit(*cp))
1085 {
1086 break; /* assume end of line */
1087 }
1088 end = NULL;
82675d28 1089 command->args[command->n_args].arg_val = strtoll(cp, &end, 0);
984263bc
MD
1090 if (cp == end)
1091 {
1092 break; /* couldn't parse number */
1093 }
1094 cp = end;
1095 command->n_args++;
1096 }
1097 break;
1098 }
1099}
1100
1101
1102static int
d2fd3c6a 1103process_geometry(CMD *command)
984263bc
MD
1104{
1105 int status = 1, i;
1106
1107 while (1)
1108 {
1109 geom_processed = 1;
1110 if (part_processed)
1111 {
1112 warnx(
1113 "ERROR line %d: the geometry specification line must occur before\n\
1114 all partition specifications",
1115 current_line_number);
1116 status = 0;
1117 break;
1118 }
1119 if (command->n_args != 3)
1120 {
1121 warnx("ERROR line %d: incorrect number of geometry args",
1122 current_line_number);
1123 status = 0;
1124 break;
1125 }
1126 dos_cyls = -1;
1127 dos_heads = -1;
1128 dos_sectors = -1;
1129 for (i = 0; i < 3; ++i)
1130 {
1131 switch (command->args[i].argtype)
1132 {
1133 case 'c':
1134 dos_cyls = command->args[i].arg_val;
1135 break;
1136 case 'h':
1137 dos_heads = command->args[i].arg_val;
1138 break;
1139 case 's':
1140 dos_sectors = command->args[i].arg_val;
1141 break;
1142 default:
1143 warnx(
1144 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1145 current_line_number, command->args[i].argtype,
1146 command->args[i].argtype);
1147 status = 0;
1148 break;
1149 }
1150 }
1151 if (status == 0)
1152 {
1153 break;
1154 }
1155
1156 dos_cylsecs = dos_heads * dos_sectors;
1157
1158 /*
1159 * Do sanity checks on parameter values
1160 */
1161 if (dos_cyls < 0)
1162 {
1163 warnx("ERROR line %d: number of cylinders not specified",
1164 current_line_number);
1165 status = 0;
1166 }
1167 if (dos_cyls == 0 || dos_cyls > 1024)
1168 {
1169 warnx(
1170 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1171 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
b52f4e19 1172 is dedicated to DragonFly)",
984263bc
MD
1173 current_line_number, dos_cyls);
1174 }
1175
1176 if (dos_heads < 0)
1177 {
1178 warnx("ERROR line %d: number of heads not specified",
1179 current_line_number);
1180 status = 0;
1181 }
1182 else if (dos_heads < 1 || dos_heads > 256)
1183 {
1184 warnx("ERROR line %d: number of heads must be within (1-256)",
1185 current_line_number);
1186 status = 0;
1187 }
1188
1189 if (dos_sectors < 0)
1190 {
1191 warnx("ERROR line %d: number of sectors not specified",
1192 current_line_number);
1193 status = 0;
1194 }
6a0b5de0 1195 else if (dos_sectors < MIN_SECTORS_PER_TRACK || dos_sectors > MAX_SECTORS_PER_TRACK)
984263bc
MD
1196 {
1197 warnx("ERROR line %d: number of sectors must be within (1-63)",
1198 current_line_number);
1199 status = 0;
1200 }
1201
1202 break;
1203 }
1204 return (status);
1205}
1206
1207
1208static int
d2fd3c6a 1209process_partition(CMD *command)
984263bc 1210{
1b0b5697
SW
1211 int status = 0, part;
1212 uint32_t prev_head_boundary, prev_cyl_boundary;
1213 uint32_t adj_size, max_end;
984263bc
MD
1214 struct dos_partition *partp;
1215
1216 while (1)
1217 {
1218 part_processed = 1;
1219 if (command->n_args != 4)
1220 {
1221 warnx("ERROR line %d: incorrect number of partition args",
1222 current_line_number);
1223 break;
1224 }
1b0b5697
SW
1225 part = command->args[0].arg_val;
1226 if (part < 1 || part > 4)
984263bc
MD
1227 {
1228 warnx("ERROR line %d: invalid partition number %d",
1b0b5697 1229 current_line_number, part);
984263bc
MD
1230 break;
1231 }
1b0b5697 1232 partp = ((struct dos_partition *) &mboot.parts) + part - 1;
984263bc
MD
1233 bzero((char *)partp, sizeof (struct dos_partition));
1234 partp->dp_typ = command->args[1].arg_val;
1235 partp->dp_start = command->args[2].arg_val;
1236 partp->dp_size = command->args[3].arg_val;
1237 max_end = partp->dp_start + partp->dp_size;
1238
1239 if (partp->dp_typ == 0)
1240 {
1241 /*
1242 * Get out, the partition is marked as unused.
1243 */
1244 /*
1245 * Insure that it's unused.
1246 */
1247 bzero((char *)partp, sizeof (struct dos_partition));
1248 status = 1;
1249 break;
1250 }
1251
1252 /*
1253 * Adjust start upwards, if necessary, to fall on an head boundary.
1254 */
1255 if (partp->dp_start % dos_sectors != 0)
1256 {
1257 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors;
1b0b5697 1258 if (max_end < (uint32_t)dos_sectors ||
984263bc
MD
1259 prev_head_boundary > max_end - dos_sectors)
1260 {
1261 /*
1262 * Can't go past end of partition
1263 */
1264 warnx(
1265 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1266 a head boundary",
1b0b5697 1267 current_line_number, part);
984263bc
MD
1268 break;
1269 }
1270 warnx(
1271 "WARNING: adjusting start offset of partition %d\n\
1272 from %u to %u, to fall on a head boundary",
1b0b5697 1273 part, (u_int)partp->dp_start,
984263bc
MD
1274 (u_int)(prev_head_boundary + dos_sectors));
1275 partp->dp_start = prev_head_boundary + dos_sectors;
1276 }
1277
1278 /*
1279 * Adjust size downwards, if necessary, to fall on a cylinder
1280 * boundary.
1281 */
1282 prev_cyl_boundary =
1283 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs;
1284 if (prev_cyl_boundary > partp->dp_start)
1285 adj_size = prev_cyl_boundary - partp->dp_start;
1286 else
1287 {
1288 warnx(
1289 "ERROR: could not adjust partition to start on a head boundary\n\
1290 and end on a cylinder boundary.");
1291 return (0);
1292 }
1293 if (adj_size != partp->dp_size)
1294 {
1295 warnx(
1296 "WARNING: adjusting size of partition %d from %u to %u\n\
1297 to end on a cylinder boundary",
1b0b5697 1298 part, (u_int)partp->dp_size, (u_int)adj_size);
984263bc
MD
1299 partp->dp_size = adj_size;
1300 }
1301 if (partp->dp_size == 0)
1302 {
1303 warnx("ERROR line %d: size of partition %d is zero",
1b0b5697 1304 current_line_number, part);
984263bc
MD
1305 break;
1306 }
1307
1308 dos(partp);
1309 status = 1;
1310 break;
1311 }
1312 return (status);
1313}
1314
1315
1316static int
d2fd3c6a 1317process_active(CMD *command)
984263bc 1318{
1b0b5697 1319 int status = 0, part, i;
984263bc
MD
1320 struct dos_partition *partp;
1321
1322 while (1)
1323 {
1324 active_processed = 1;
1325 if (command->n_args != 1)
1326 {
1327 warnx("ERROR line %d: incorrect number of active args",
1328 current_line_number);
1329 status = 0;
1330 break;
1331 }
1b0b5697
SW
1332 part = command->args[0].arg_val;
1333 if (part < 1 || part > 4)
984263bc
MD
1334 {
1335 warnx("ERROR line %d: invalid partition number %d",
1b0b5697 1336 current_line_number, part);
984263bc
MD
1337 break;
1338 }
1339 /*
1340 * Reset active partition
1341 */
1342 partp = ((struct dos_partition *) &mboot.parts);
1343 for (i = 0; i < NDOSPART; i++)
1344 partp[i].dp_flag = 0;
1b0b5697 1345 partp[part-1].dp_flag = ACTIVE;
984263bc
MD
1346
1347 status = 1;
1348 break;
1349 }
1350 return (status);
1351}
1352
1353
1354static int
d2fd3c6a 1355process_line(char *line)
984263bc
MD
1356{
1357 CMD command;
1358 int status = 1;
1359
1360 while (1)
1361 {
1362 parse_config_line(line, &command);
1363 switch (command.cmd)
1364 {
1365 case 0:
1366 /*
1367 * Comment or blank line
1368 */
1369 break;
1370 case 'g':
1371 /*
1372 * Set geometry
1373 */
1374 status = process_geometry(&command);
1375 break;
1376 case 'p':
1377 status = process_partition(&command);
1378 break;
1379 case 'a':
1380 status = process_active(&command);
1381 break;
1382 default:
1383 status = 0;
1384 break;
1385 }
1386 break;
1387 }
1388 return (status);
1389}
1390
1391
1392static int
d2fd3c6a 1393read_config(char *config_file)
984263bc
MD
1394{
1395 FILE *fp = NULL;
1396 int status = 1;
1397 char buf[1010];
1398
1399 while (1) /* dirty trick used to insure one exit point for this
1400 function */
1401 {
1402 if (strcmp(config_file, "-") != 0)
1403 {
1404 /*
1405 * We're not reading from stdin
1406 */
1407 if ((fp = fopen(config_file, "r")) == NULL)
1408 {
1409 status = 0;
1410 break;
1411 }
1412 }
1413 else
1414 {
1415 fp = stdin;
1416 }
1417 current_line_number = 0;
1418 while (!feof(fp))
1419 {
1420 if (fgets(buf, sizeof(buf), fp) == NULL)
1421 {
1422 break;
1423 }
1424 ++current_line_number;
1425 status = process_line(buf);
1426 if (status == 0)
1427 {
1428 break;
1429 }
1430 }
1431 break;
1432 }
1433 if (fp)
1434 {
1435 /*
1436 * It doesn't matter if we're reading from stdin, as we've reached EOF
1437 */
1438 fclose(fp);
1439 }
1440 return (status);
1441}
1442
1443
1444static void
1445reset_boot(void)
1446{
1447 int i;
1448 struct dos_partition *partp;
1449
1450 init_boot();
1451 for (i = 0; i < 4; ++i)
1452 {
1453 partp = ((struct dos_partition *) &mboot.parts) + i;
1454 bzero((char *)partp, sizeof (struct dos_partition));
1455 }
1456}
1457
1458static int
d2fd3c6a 1459sanitize_partition(struct dos_partition *partp)
984263bc 1460{
1b0b5697
SW
1461 uint32_t prev_head_boundary, prev_cyl_boundary;
1462 uint32_t max_end, size, start;
984263bc
MD
1463
1464 start = partp->dp_start;
1465 size = partp->dp_size;
1466 max_end = start + size;
1467 /* Only allow a zero size if the partition is being marked unused. */
1468 if (size == 0) {
1469 if (start == 0 && partp->dp_typ == 0)
1470 return (1);
1471 warnx("ERROR: size of partition is zero");
1472 return (0);
1473 }
1474 /* Return if no adjustment is necessary. */
1475 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
1476 return (1);
1477
c7928bfd
HP
1478 if (start == 0) {
1479 warnx("WARNING: partition overlaps with partition table");
1480 if (ok("Correct this automatically?"))
1481 start = dos_sectors;
1482 }
984263bc
MD
1483 if (start % dos_sectors != 0)
1484 warnx("WARNING: partition does not start on a head boundary");
1485 if ((start +size) % dos_sectors != 0)
1486 warnx("WARNING: partition does not end on a cylinder boundary");
1487 warnx("WARNING: this may confuse the BIOS or some operating systems");
1488 if (!ok("Correct this automatically?"))
1489 return (1);
1490
1491 /*
1492 * Adjust start upwards, if necessary, to fall on an head boundary.
1493 */
1494 if (start % dos_sectors != 0) {
1495 prev_head_boundary = start / dos_sectors * dos_sectors;
1b0b5697 1496 if (max_end < (uint32_t)dos_sectors ||
984263bc
MD
1497 prev_head_boundary >= max_end - dos_sectors) {
1498 /*
1499 * Can't go past end of partition
1500 */
1501 warnx(
1502 "ERROR: unable to adjust start of partition to fall on a head boundary");
1503 return (0);
1504 }
1505 start = prev_head_boundary + dos_sectors;
1506 }
1507
1508 /*
1509 * Adjust size downwards, if necessary, to fall on a cylinder
1510 * boundary.
1511 */
1512 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs;
1513 if (prev_cyl_boundary > start)
1514 size = prev_cyl_boundary - start;
1515 else {
1516 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1517 and end on a cylinder boundary.");
1518 return (0);
1519 }
1520
1521 /* Finally, commit any changes to partp and return. */
1522 if (start != partp->dp_start) {
1523 warnx("WARNING: adjusting start offset of partition to %u",
1524 (u_int)start);
1525 partp->dp_start = start;
1526 }
1527 if (size != partp->dp_size) {
1528 warnx("WARNING: adjusting size of partition to %u", (u_int)size);
1529 partp->dp_size = size;
1530 }
1531
1532 return (1);
1533}