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Drop main() prototype. Syncs with NetBSD-8
[minix.git] / sbin / newfs_msdos / mkfs_msdos.c
blob05ae2c1026123906c517d3b8e6b33badff36f2c7
1 /* $NetBSD: mkfs_msdos.c,v 1.13 2017/04/14 15:39:29 christos Exp $ */
2
3 /*
4 * Copyright (c) 1998 Robert Nordier
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #if HAVE_NBTOOL_CONFIG_H
31 #include "nbtool_config.h"
32 #endif
33
34 #include <sys/cdefs.h>
35 #ifndef lint
36 #if 0
37 static const char rcsid[] =
38 "$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.15 2000/10/10 01:49:37 wollman Exp $";
39 #else
40 __RCSID("$NetBSD: mkfs_msdos.c,v 1.13 2017/04/14 15:39:29 christos Exp $");
41 #endif
42 #endif /* not lint */
43
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/stat.h>
47 #include <sys/time.h>
48 #ifndef MAKEFS
49 #include <sys/mount.h>
50 #include <sys/disk.h>
51 #endif
52
53 #include <ctype.h>
54 #include <err.h>
55 #include <errno.h>
56 #include <fcntl.h>
57 #include <paths.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <time.h>
62 #include <unistd.h>
63 #include <signal.h>
64
65 #include <util.h>
66 #include <disktab.h>
67
68 #ifndef MAKEFS
69 #include "partutil.h"
70 #endif
71 #include "mkfs_msdos.h"
72
73 #define MAXU16 0xffff /* maximum unsigned 16-bit quantity */
74 #define BPN 4 /* bits per nibble */
75 #define NPB 2 /* nibbles per byte */
76
77 #define DOSMAGIC 0xaa55 /* DOS magic number */
78 #define MINBPS 512 /* minimum bytes per sector */
79 #define MAXSPC 128 /* maximum sectors per cluster */
80 #define MAXNFT 16 /* maximum number of FATs */
81 #define DEFBLK 4096 /* default block size */
82 #define DEFBLK16 2048 /* default block size FAT16 */
83 #define DEFRDE 512 /* default root directory entries */
84 #define RESFTE 2 /* reserved FAT entries */
85 #define MINCLS12 1 /* minimum FAT12 clusters */
86 #define MINCLS16 0xff5 /* minimum FAT16 clusters */
87 #define MINCLS32 0xfff5 /* minimum FAT32 clusters */
88 #define MAXCLS12 0xff4 /* maximum FAT12 clusters */
89 #define MAXCLS16 0xfff4 /* maximum FAT16 clusters */
90 #define MAXCLS32 0xffffff4 /* maximum FAT32 clusters */
91
92 #define mincls(fat_type) ((fat_type) == 12 ? MINCLS12 : \
93 (fat_type) == 16 ? MINCLS16 : \
94 MINCLS32)
95
96 #define maxcls(fat_type) ((fat_type) == 12 ? MAXCLS12 : \
97 (fat_type) == 16 ? MAXCLS16 : \
98 MAXCLS32)
99
100 #define mk1(p, x) \
101 (p) = (u_int8_t)(x)
102
103 #define mk2(p, x) \
104 (p)[0] = (u_int8_t)(x), \
105 (p)[1] = (u_int8_t)((x) >> 010)
106
107 #define mk4(p, x) \
108 (p)[0] = (u_int8_t)(x), \
109 (p)[1] = (u_int8_t)((x) >> 010), \
110 (p)[2] = (u_int8_t)((x) >> 020), \
111 (p)[3] = (u_int8_t)((x) >> 030)
112
113 struct bs {
114 u_int8_t jmp[3]; /* bootstrap entry point */
115 u_int8_t oem[8]; /* OEM name and version */
116 };
117
118 struct bsbpb {
119 u_int8_t bps[2]; /* bytes per sector */
120 u_int8_t spc; /* sectors per cluster */
121 u_int8_t res[2]; /* reserved sectors */
122 u_int8_t nft; /* number of FATs */
123 u_int8_t rde[2]; /* root directory entries */
124 u_int8_t sec[2]; /* total sectors */
125 u_int8_t mid; /* media descriptor */
126 u_int8_t spf[2]; /* sectors per FAT */
127 u_int8_t spt[2]; /* sectors per track */
128 u_int8_t hds[2]; /* drive heads */
129 u_int8_t hid[4]; /* hidden sectors */
130 u_int8_t bsec[4]; /* big total sectors */
131 };
132
133 struct bsxbpb {
134 u_int8_t bspf[4]; /* big sectors per FAT */
135 u_int8_t xflg[2]; /* FAT control flags */
136 u_int8_t vers[2]; /* file system version */
137 u_int8_t rdcl[4]; /* root directory start cluster */
138 u_int8_t infs[2]; /* file system info sector */
139 u_int8_t bkbs[2]; /* backup boot sector */
140 u_int8_t rsvd[12]; /* reserved */
141 };
142
143 struct bsx {
144 u_int8_t drv; /* drive number */
145 u_int8_t rsvd; /* reserved */
146 u_int8_t sig; /* extended boot signature */
147 u_int8_t volid[4]; /* volume ID number */
148 u_int8_t label[11]; /* volume label */
149 u_int8_t type[8]; /* file system type */
150 };
151
152 struct de {
153 u_int8_t namext[11]; /* name and extension */
154 u_int8_t attr; /* attributes */
155 u_int8_t rsvd[10]; /* reserved */
156 u_int8_t time[2]; /* creation time */
157 u_int8_t date[2]; /* creation date */
158 u_int8_t clus[2]; /* starting cluster */
159 u_int8_t size[4]; /* size */
160 };
161
162 struct bpb {
163 u_int bps; /* bytes per sector */
164 u_int spc; /* sectors per cluster */
165 u_int res; /* reserved sectors */
166 u_int nft; /* number of FATs */
167 u_int rde; /* root directory entries */
168 u_int sec; /* total sectors */
169 u_int mid; /* media descriptor */
170 u_int spf; /* sectors per FAT */
171 u_int spt; /* sectors per track */
172 u_int hds; /* drive heads */
173 u_int hid; /* hidden sectors */
174 u_int bsec; /* big total sectors */
175 u_int bspf; /* big sectors per FAT */
176 u_int rdcl; /* root directory start cluster */
177 u_int infs; /* file system info sector */
178 u_int bkbs; /* backup boot sector */
179 };
180
181 #define INIT(a, b, c, d, e, f, g, h, i, j) \
182 { .bps = a, .spc = b, .res = c, .nft = d, .rde = e, \
183 .sec = f, .mid = g, .spf = h, .spt = i, .hds = j, }
184 static struct {
185 const char *name;
186 struct bpb bpb;
187 } stdfmt[] = {
188 {"160", INIT(512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1)},
189 {"180", INIT(512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1)},
190 {"320", INIT(512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2)},
191 {"360", INIT(512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2)},
192 {"640", INIT(512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2)},
193 {"720", INIT(512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2)},
194 {"1200", INIT(512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2)},
195 {"1232", INIT(1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2)},
196 {"1440", INIT(512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2)},
197 {"2880", INIT(512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2)}
198 };
199
200 static u_int8_t bootcode[] = {
201 0xfa, /* cli */
202 0x31, 0xc0, /* xor ax,ax */
203 0x8e, 0xd0, /* mov ss,ax */
204 0xbc, 0x00, 0x7c, /* mov sp,7c00h */
205 0xfb, /* sti */
206 0x8e, 0xd8, /* mov ds,ax */
207 0xe8, 0x00, 0x00, /* call $ + 3 */
208 0x5e, /* pop si */
209 0x83, 0xc6, 0x19, /* add si,+19h */
210 0xbb, 0x07, 0x00, /* mov bx,0007h */
211 0xfc, /* cld */
212 0xac, /* lodsb */
213 0x84, 0xc0, /* test al,al */
214 0x74, 0x06, /* jz $ + 8 */
215 0xb4, 0x0e, /* mov ah,0eh */
216 0xcd, 0x10, /* int 10h */
217 0xeb, 0xf5, /* jmp $ - 9 */
218 0x30, 0xe4, /* xor ah,ah */
219 0xcd, 0x16, /* int 16h */
220 0xcd, 0x19, /* int 19h */
221 0x0d, 0x0a,
222 'N', 'o', 'n', '-', 's', 'y', 's', 't',
223 'e', 'm', ' ', 'd', 'i', 's', 'k',
224 0x0d, 0x0a,
225 'P', 'r', 'e', 's', 's', ' ', 'a', 'n',
226 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o',
227 ' ', 'r', 'e', 'b', 'o', 'o', 't',
228 0x0d, 0x0a,
229 0
230 };
231
232 static int got_siginfo = 0; /* received a SIGINFO */
233
234 #ifndef MAKEFS
235 static int check_mounted(const char *, mode_t);
236 #endif
237 static int getstdfmt(const char *, struct bpb *);
238 static int getbpbinfo(int, const char *, const char *, int, struct bpb *, off_t);
239 static void print_bpb(struct bpb *);
240 static int ckgeom(const char *, u_int, const char *);
241 static int oklabel(const char *);
242 static void mklabel(u_int8_t *, const char *);
243 static void setstr(u_int8_t *, const char *, size_t);
244 static void infohandler(int sig);
245
246 int
247 mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op)
248 {
249 char buf[MAXPATHLEN];
250 struct stat sb;
251 struct timeval tv;
252 struct bpb bpb;
253 struct tm *tm;
254 struct bs *bs;
255 struct bsbpb *bsbpb;
256 struct bsxbpb *bsxbpb;
257 struct bsx *bsx;
258 struct de *de;
259 u_int8_t *img;
260 const char *bname;
261 ssize_t n;
262 time_t now;
263 u_int bss, rds, cls, dir, lsn, x, x1, x2;
264 int ch, fd, fd1;
265 struct msdos_options o = *op;
266 int oflags = O_RDWR | O_CREAT;
267
268 if (o.block_size && o.sectors_per_cluster) {
269 warnx("Cannot specify both block size and sectors per cluster");
270 return -1;
271 }
272 if (o.OEM_string && strlen(o.OEM_string) > 8) {
273 warnx("%s: bad OEM string", o.OEM_string);
274 return -1;
275 }
276 if (o.create_size) {
277 if (o.no_create) {
278 warnx("create (-C) is incompatible with -N");
279 return -1;
280 }
281 if (o.offset == 0)
282 oflags |= O_TRUNC;
283 fd = open(fname, oflags, 0644);
284 if (fd == -1) {
285 warnx("failed to create %s", fname);
286 return -1;
287 }
288 (void)lseek(fd, o.create_size - 1, SEEK_SET);
289 if (write(fd, "\0", 1) != 1) {
290 warn("failed to set file size");
291 return -1;
292 }
293 (void)lseek(fd, 0, SEEK_SET);
294 } else if ((fd = open(fname, o.no_create ? O_RDONLY : O_RDWR)) == -1 ||
295 fstat(fd, &sb)) {
296 warn("%s", fname);
297 return -1;
298 }
299 #ifndef MAKEFS
300 if (!o.no_create)
301 if (check_mounted(fname, sb.st_mode) == -1)
302 return -1;
303 #endif
304 if (!S_ISCHR(sb.st_mode) && !o.create_size) {
305 warnx("warning, %s is not a character device", fname);
306 return -1;
307 }
308 if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) {
309 warnx("cannot seek to %jd", (intmax_t)o.offset);
310 return -1;
311 }
312 memset(&bpb, 0, sizeof(bpb));
313 if (o.floppy) {
314 if (getstdfmt(o.floppy, &bpb) == -1)
315 return -1;
316 bpb.bsec = bpb.sec;
317 bpb.sec = 0;
318 bpb.bspf = bpb.spf;
319 bpb.spf = 0;
320 }
321 if (o.drive_heads)
322 bpb.hds = o.drive_heads;
323 if (o.sectors_per_track)
324 bpb.spt = o.sectors_per_track;
325 if (o.bytes_per_sector)
326 bpb.bps = o.bytes_per_sector;
327 if (o.size)
328 bpb.bsec = o.size;
329 if (o.hidden_sectors_set)
330 bpb.hid = o.hidden_sectors;
331 if (!(o.floppy || (o.drive_heads && o.sectors_per_track &&
332 o.bytes_per_sector && o.size && o.hidden_sectors_set))) {
333 if (getbpbinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb,
334 o.create_size) == -1)
335 return -1;
336 bpb.bsec -= (o.offset / bpb.bps);
337 if (bpb.spc == 0) { /* set defaults */
338 /* minimum cluster size */
339 switch (o.fat_type) {
340 case 12:
341 bpb.spc = 1; /* use 512 bytes */
342 x = 2; /* up to 2MB */
343 break;
344 case 16:
345 bpb.spc = 1; /* use 512 bytes */
346 x = 32; /* up to 32MB */
347 break;
348 default:
349 bpb.spc = 8; /* use 4k */
350 x = 8192; /* up to 8GB */
351 break;
352 }
353 x1 = howmany(bpb.bsec, (1048576 / 512)); /* -> MB */
354 while (bpb.spc < 128 && x < x1) {
355 x *= 2;
356 bpb.spc *= 2;
357 }
358 }
359 }
360
361 if (o.volume_label && !oklabel(o.volume_label)) {
362 warnx("%s: bad volume label", o.volume_label);
363 return -1;
364 }
365
366 switch (o.fat_type) {
367 case 0:
368 if (o.floppy)
369 o.fat_type = 12;
370 else if (!o.directory_entries && (o.info_sector || o.backup_sector))
371 o.fat_type = 32;
372 break;
373 case 12:
374 case 16:
375 if (o.info_sector) {
376 warnx("Cannot specify info sector with FAT%u", o.fat_type);
377 return -1;
378 }
379 if (o.backup_sector) {
380 warnx("Cannot specify backup sector with FAT%u", o.fat_type);
381 return -1;
382 }
383 break;
384 case 32:
385 if (o.directory_entries) {
386 warnx("Cannot specify directory entries with FAT32");
387 return -1;
388 }
389 break;
390 default:
391 warnx("%d: bad FAT type", o.fat_type);
392 return -1;
393 }
394 if (!powerof2(bpb.bps)) {
395 warnx("bytes/sector (%u) is not a power of 2", bpb.bps);
396 return -1;
397 }
398 if (bpb.bps < MINBPS) {
399 warnx("bytes/sector (%u) is too small; minimum is %u",
400 bpb.bps, MINBPS);
401 return -1;
402 }
403
404 if (o.floppy && o.fat_type == 32)
405 bpb.rde = 0;
406 if (o.block_size) {
407 if (!powerof2(o.block_size)) {
408 warnx("block size (%u) is not a power of 2", o.block_size);
409 return -1;
410 }
411 if (o.block_size < bpb.bps) {
412 warnx("block size (%u) is too small; minimum is %u",
413 o.block_size, bpb.bps);
414 return -1;
415 }
416 if (o.block_size > bpb.bps * MAXSPC) {
417 warnx("block size (%u) is too large; maximum is %u",
418 o.block_size, bpb.bps * MAXSPC);
419 return -1;
420 }
421 bpb.spc = o.block_size / bpb.bps;
422 }
423 if (o.sectors_per_cluster) {
424 if (!powerof2(o.sectors_per_cluster)) {
425 warnx("sectors/cluster (%u) is not a power of 2",
426 o.sectors_per_cluster);
427 return -1;
428 }
429 bpb.spc = o.sectors_per_cluster;
430 }
431 if (o.reserved_sectors)
432 bpb.res = o.reserved_sectors;
433 if (o.num_FAT) {
434 if (o.num_FAT > MAXNFT) {
435 warnx("number of FATs (%u) is too large; maximum is %u",
436 o.num_FAT, MAXNFT);
437 return -1;
438 }
439 bpb.nft = o.num_FAT;
440 }
441 if (o.directory_entries)
442 bpb.rde = o.directory_entries;
443 if (o.media_descriptor_set) {
444 if (o.media_descriptor < 0xf0) {
445 warnx("illegal media descriptor (%#x)", o.media_descriptor);
446 return -1;
447 }
448 bpb.mid = o.media_descriptor;
449 }
450 if (o.sectors_per_fat)
451 bpb.bspf = o.sectors_per_fat;
452 if (o.info_sector)
453 bpb.infs = o.info_sector;
454 if (o.backup_sector)
455 bpb.bkbs = o.backup_sector;
456 bss = 1;
457 bname = NULL;
458 fd1 = -1;
459 if (o.bootstrap) {
460 bname = o.bootstrap;
461 if (!strchr(bname, '/')) {
462 snprintf(buf, sizeof(buf), "/boot/%s", bname);
463 if (!(bname = strdup(buf))) {
464 warn(NULL);
465 return -1;
466 }
467 }
468 if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) {
469 warn("%s", bname);
470 return -1;
471 }
472 if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps ||
473 sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) {
474 warnx("%s: inappropriate file type or format", bname);
475 return -1;
476 }
477 bss = sb.st_size / bpb.bps;
478 }
479 if (!bpb.nft)
480 bpb.nft = 2;
481 if (!o.fat_type) {
482 if (bpb.bsec < (bpb.res ? bpb.res : bss) +
483 howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) *
484 ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) *
485 bpb.nft +
486 howmany(bpb.rde ? bpb.rde : DEFRDE,
487 bpb.bps / sizeof(struct de)) +
488 (bpb.spc ? MINCLS16 : MAXCLS12 + 1) *
489 (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps)))
490 o.fat_type = 12;
491 else if (bpb.rde || bpb.bsec <
492 (bpb.res ? bpb.res : bss) +
493 howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft +
494 howmany(DEFRDE, bpb.bps / sizeof(struct de)) +
495 (MAXCLS16 + 1) *
496 (bpb.spc ? bpb.spc : howmany(8192, bpb.bps)))
497 o.fat_type = 16;
498 else
499 o.fat_type = 32;
500 }
501 x = bss;
502 if (o.fat_type == 32) {
503 if (!bpb.infs) {
504 if (x == MAXU16 || x == bpb.bkbs) {
505 warnx("no room for info sector");
506 return -1;
507 }
508 bpb.infs = x;
509 }
510 if (bpb.infs != MAXU16 && x <= bpb.infs)
511 x = bpb.infs + 1;
512 if (!bpb.bkbs) {
513 if (x == MAXU16) {
514 warnx("no room for backup sector");
515 return -1;
516 }
517 bpb.bkbs = x;
518 } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) {
519 warnx("backup sector would overwrite info sector");
520 return -1;
521 }
522 if (bpb.bkbs != MAXU16 && x <= bpb.bkbs)
523 x = bpb.bkbs + 1;
524 }
525 if (!bpb.res)
526 bpb.res = o.fat_type == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x;
527 else if (bpb.res < x) {
528 warnx("too few reserved sectors (need %d have %d)", x, bpb.res);
529 return -1;
530 }
531 if (o.fat_type != 32 && !bpb.rde)
532 bpb.rde = DEFRDE;
533 rds = howmany(bpb.rde, bpb.bps / sizeof(struct de));
534 if (!bpb.spc)
535 for (bpb.spc = howmany(o.fat_type == 16 ? DEFBLK16 : DEFBLK, bpb.bps);
536 bpb.spc < MAXSPC &&
537 bpb.res +
538 howmany((RESFTE + maxcls(o.fat_type)) * (o.fat_type / BPN),
539 bpb.bps * NPB) * bpb.nft +
540 rds +
541 (u_int64_t)(maxcls(o.fat_type) + 1) * bpb.spc <= bpb.bsec;
542 bpb.spc <<= 1);
543 if (o.fat_type != 32 && bpb.bspf > MAXU16) {
544 warnx("too many sectors/FAT for FAT12/16");
545 return -1;
546 }
547 x1 = bpb.res + rds;
548 x = bpb.bspf ? bpb.bspf : 1;
549 if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) {
550 warnx("meta data exceeds file system size");
551 return -1;
552 }
553 x1 += x * bpb.nft;
554 x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB /
555 (bpb.spc * bpb.bps * NPB + o.fat_type / BPN * bpb.nft);
556 x2 = howmany((RESFTE + MIN(x, maxcls(o.fat_type))) * (o.fat_type / BPN),
557 bpb.bps * NPB);
558 if (!bpb.bspf) {
559 bpb.bspf = x2;
560 x1 += (bpb.bspf - 1) * bpb.nft;
561 }
562 cls = (bpb.bsec - x1) / bpb.spc;
563 x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (o.fat_type / BPN) - RESFTE;
564 if (cls > x)
565 cls = x;
566 if (bpb.bspf < x2) {
567 warnx("warning: sectors/FAT limits file system to %u clusters",
568 cls);
569 return -1;
570 }
571 if (cls < mincls(o.fat_type)) {
572 warnx("%u clusters too few clusters for FAT%u, need %u", cls,
573 o.fat_type, mincls(o.fat_type));
574 return -1;
575 }
576 if (cls > maxcls(o.fat_type)) {
577 cls = maxcls(o.fat_type);
578 bpb.bsec = x1 + (cls + 1) * bpb.spc - 1;
579 warnx("warning: FAT type limits file system to %u sectors",
580 bpb.bsec);
581 return -1;
582 }
583 printf("%s: %u sector%s in %u FAT%u cluster%s "
584 "(%u bytes/cluster)\n", fname, cls * bpb.spc,
585 cls * bpb.spc == 1 ? "" : "s", cls, o.fat_type,
586 cls == 1 ? "" : "s", bpb.bps * bpb.spc);
587 if (!bpb.mid)
588 bpb.mid = !bpb.hid ? 0xf0 : 0xf8;
589 if (o.fat_type == 32)
590 bpb.rdcl = RESFTE;
591 if (bpb.hid + bpb.bsec <= MAXU16) {
592 bpb.sec = bpb.bsec;
593 bpb.bsec = 0;
594 }
595 if (o.fat_type != 32) {
596 bpb.spf = bpb.bspf;
597 bpb.bspf = 0;
598 }
599 ch = 0;
600 if (o.fat_type == 12)
601 ch = 1; /* 001 Primary DOS with 12 bit FAT */
602 else if (o.fat_type == 16) {
603 if (bpb.bsec == 0)
604 ch = 4; /* 004 Primary DOS with 16 bit FAT <32M */
605 else
606 ch = 6; /* 006 Primary 'big' DOS, 16-bit FAT (> 32MB) */
607 /*
608 * XXX: what about:
609 * 014 DOS (16-bit FAT) - LBA
610 * ?
611 */
612 } else if (o.fat_type == 32) {
613 ch = 11; /* 011 Primary DOS with 32 bit FAT */
614 /*
615 * XXX: what about:
616 * 012 Primary DOS with 32 bit FAT - LBA
617 * ?
618 */
619 }
620 if (ch != 0)
621 printf("MBR type: %d\n", ch);
622 print_bpb(&bpb);
623 if (!o.no_create) {
624 if (o.timestamp_set) {
625 tv.tv_sec = now = o.timestamp;
626 tv.tv_usec = 0;
627 tm = gmtime(&now);
628 } else {
629 gettimeofday(&tv, NULL);
630 now = tv.tv_sec;
631 tm = localtime(&now);
632 }
633 if (!(img = malloc(bpb.bps)))
634 err(1, NULL);
635 dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft;
636 #ifdef SIGINFO
637 signal(SIGINFO, infohandler);
638 #endif
639 for (lsn = 0; lsn < dir + (o.fat_type == 32 ? bpb.spc : rds); lsn++) {
640 if (got_siginfo) {
641 fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n",
642 fname,lsn,(dir + (o.fat_type == 32 ? bpb.spc : rds)),
643 (lsn*100)/(dir + (o.fat_type == 32 ? bpb.spc : rds)));
644 got_siginfo = 0;
645 }
646 x = lsn;
647 if (o.bootstrap &&
648 o.fat_type == 32 && bpb.bkbs != MAXU16 &&
649 bss <= bpb.bkbs && x >= bpb.bkbs) {
650 x -= bpb.bkbs;
651 if (!x && lseek(fd1, o.offset, SEEK_SET)) {
652 warn("%s", bname);
653 return -1;
654 }
655 }
656 if (o.bootstrap && x < bss) {
657 if ((n = read(fd1, img, bpb.bps)) == -1) {
658 warn("%s", bname);
659 return -1;
660 }
661 if ((size_t)n != bpb.bps) {
662 warnx("%s: can't read sector %u", bname, x);
663 return -1;
664 }
665 } else
666 memset(img, 0, bpb.bps);
667 if (!lsn ||
668 (o.fat_type == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) {
669 x1 = sizeof(struct bs);
670 bsbpb = (struct bsbpb *)(img + x1);
671 mk2(bsbpb->bps, bpb.bps);
672 mk1(bsbpb->spc, bpb.spc);
673 mk2(bsbpb->res, bpb.res);
674 mk1(bsbpb->nft, bpb.nft);
675 mk2(bsbpb->rde, bpb.rde);
676 mk2(bsbpb->sec, bpb.sec);
677 mk1(bsbpb->mid, bpb.mid);
678 mk2(bsbpb->spf, bpb.spf);
679 mk2(bsbpb->spt, bpb.spt);
680 mk2(bsbpb->hds, bpb.hds);
681 mk4(bsbpb->hid, bpb.hid);
682 mk4(bsbpb->bsec, bpb.bsec);
683 x1 += sizeof(struct bsbpb);
684 if (o.fat_type == 32) {
685 bsxbpb = (struct bsxbpb *)(img + x1);
686 mk4(bsxbpb->bspf, bpb.bspf);
687 mk2(bsxbpb->xflg, 0);
688 mk2(bsxbpb->vers, 0);
689 mk4(bsxbpb->rdcl, bpb.rdcl);
690 mk2(bsxbpb->infs, bpb.infs);
691 mk2(bsxbpb->bkbs, bpb.bkbs);
692 x1 += sizeof(struct bsxbpb);
693 }
694 bsx = (struct bsx *)(img + x1);
695 mk1(bsx->sig, 0x29);
696 if (o.volume_id_set)
697 x = o.volume_id;
698 else
699 x = (((u_int)(1 + tm->tm_mon) << 8 |
700 (u_int)tm->tm_mday) +
701 ((u_int)tm->tm_sec << 8 |
702 (u_int)(tv.tv_usec / 10))) << 16 |
703 ((u_int)(1900 + tm->tm_year) +
704 ((u_int)tm->tm_hour << 8 |
705 (u_int)tm->tm_min));
706 mk4(bsx->volid, x);
707 mklabel(bsx->label, o.volume_label ? o.volume_label : "NO NAME");
708 snprintf(buf, sizeof(buf), "FAT%u", o.fat_type);
709 setstr(bsx->type, buf, sizeof(bsx->type));
710 if (!o.bootstrap) {
711 x1 += sizeof(struct bsx);
712 bs = (struct bs *)img;
713 mk1(bs->jmp[0], 0xeb);
714 mk1(bs->jmp[1], x1 - 2);
715 mk1(bs->jmp[2], 0x90);
716 setstr(bs->oem, o.OEM_string ? o.OEM_string : "NetBSD",
717 sizeof(bs->oem));
718 memcpy(img + x1, bootcode, sizeof(bootcode));
719 mk2(img + MINBPS - 2, DOSMAGIC);
720 }
721 } else if (o.fat_type == 32 && bpb.infs != MAXU16 &&
722 (lsn == bpb.infs ||
723 (bpb.bkbs != MAXU16 &&
724 lsn == bpb.bkbs + bpb.infs))) {
725 mk4(img, 0x41615252);
726 mk4(img + MINBPS - 28, 0x61417272);
727 mk4(img + MINBPS - 24, 0xffffffff);
728 mk4(img + MINBPS - 20, 0xffffffff);
729 mk2(img + MINBPS - 2, DOSMAGIC);
730 } else if (lsn >= bpb.res && lsn < dir &&
731 !((lsn - bpb.res) %
732 (bpb.spf ? bpb.spf : bpb.bspf))) {
733 mk1(img[0], bpb.mid);
734 for (x = 1; x < o.fat_type * (o.fat_type == 32 ? 3U : 2U) / 8U; x++)
735 mk1(img[x], o.fat_type == 32 && x % 4 == 3 ? 0x0f : 0xff);
736 } else if (lsn == dir && o.volume_label) {
737 de = (struct de *)img;
738 mklabel(de->namext, o.volume_label);
739 mk1(de->attr, 050);
740 x = (u_int)tm->tm_hour << 11 |
741 (u_int)tm->tm_min << 5 |
742 (u_int)tm->tm_sec >> 1;
743 mk2(de->time, x);
744 x = (u_int)(tm->tm_year - 80) << 9 |
745 (u_int)(tm->tm_mon + 1) << 5 |
746 (u_int)tm->tm_mday;
747 mk2(de->date, x);
748 }
749 if ((n = write(fd, img, bpb.bps)) == -1) {
750 warn("%s", fname);
751 return -1;
752 }
753 if ((size_t)n != bpb.bps) {
754 warnx("%s: can't write sector %u", fname, lsn);
755 return -1;
756 }
757 }
758 }
759 return 0;
760 }
761
762 #ifndef MAKEFS
763 /*
764 * return -1 with error if file system is mounted.
765 */
766 static int
767 check_mounted(const char *fname, mode_t mode)
768 {
769 struct statvfs *mp;
770 const char *s1, *s2;
771 size_t len;
772 int n, r;
773
774 if (!(n = getmntinfo(&mp, MNT_NOWAIT))) {
775 warn("getmntinfo");
776 return -1;
777 }
778 len = strlen(_PATH_DEV);
779 s1 = fname;
780 if (!strncmp(s1, _PATH_DEV, len))
781 s1 += len;
782 r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
783 for (; n--; mp++) {
784 s2 = mp->f_mntfromname;
785 if (!strncmp(s2, _PATH_DEV, len))
786 s2 += len;
787 if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) ||
788 !strcmp(s1, s2)) {
789 warnx("%s is mounted on %s", fname, mp->f_mntonname);
790 return -1;
791 }
792 }
793 return 0;
794 }
795 #endif
796
797 /*
798 * Get a standard format.
799 */
800 static int
801 getstdfmt(const char *fmt, struct bpb *bpb)
802 {
803 u_int x, i;
804
805 x = sizeof(stdfmt) / sizeof(stdfmt[0]);
806 for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++);
807 if (i == x) {
808 warnx("%s: unknown standard format", fmt);
809 return -1;
810 }
811 *bpb = stdfmt[i].bpb;
812 return 0;
813 }
814
815 /*
816 * Get disk slice, partition, and geometry information.
817 */
818 static int
819 getbpbinfo(int fd, const char *fname, const char *dtype, int iflag,
820 struct bpb *bpb, off_t create_size)
821 {
822 const char *s1, *s2;
823 int part;
824
825 part = -1;
826 s1 = fname;
827 if ((s2 = strrchr(s1, '/')))
828 s1 = s2 + 1;
829 for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++);
830 if (!*s2 || s2 == s1)
831 s2 = NULL;
832 else
833 while (isdigit((unsigned char)*++s2));
834 s1 = s2;
835
836 #ifndef MAKEFS
837 int maxpartitions = getmaxpartitions();
838 struct disk_geom geo;
839 struct dkwedge_info dkw;
840
841 // XXX: Does not work with wedges
842 if (s2 && *s2 >= 'a' && *s2 <= 'a' + maxpartitions - 1) {
843 part = *s2++ - 'a';
844 }
845 #endif
846
847 if (!(((part != -1) && ((!iflag && part != -1) || !bpb->bsec)) ||
848 !bpb->bps || !bpb->spt || !bpb->hds)) {
849 return 0;
850 }
851
852 u_int sector_size = 512;
853 u_int nsectors = 63;
854 u_int ntracks = 255;
855 u_int size;
856
857 if (create_size == 0) {
858 #ifndef MAKEFS
859 if (getdiskinfo(fname, fd, NULL, &geo, &dkw) != -1) {
860 sector_size = geo.dg_secsize;
861 nsectors = geo.dg_nsectors;
862 ntracks = geo.dg_ntracks;
863 size = dkw.dkw_size;
864 } else
865 #endif
866 {
867 struct stat st;
868
869 if (fstat(fd, &st) == -1) {
870 warnx("Can't get disk size for `%s'", fname);
871 return -1;
872 }
873 size = st.st_size / sector_size;
874 }
875 } else {
876 size = create_size / sector_size;
877 }
878
879 if (!bpb->bps) {
880 if (ckgeom(fname, sector_size, "bytes/sector") == -1)
881 return -1;
882 bpb->bps = sector_size;
883 }
884
885 if (nsectors > 63) {
886 /*
887 * The kernel doesn't accept BPB with spt > 63.
888 * (see sys/fs/msdosfs/msdosfs_vfsops.c:msdosfs_mountfs())
889 * If values taken from disklabel don't match these
890 * restrictions, use popular BIOS default values instead.
891 */
892 nsectors = 63;
893 }
894 if (!bpb->spt) {
895 if (ckgeom(fname, nsectors, "sectors/track") == -1)
896 return -1;
897 bpb->spt = nsectors;
898 }
899 if (!bpb->hds)
900 if (ckgeom(fname, ntracks, "drive heads") == -1)
901 return -1;
902 bpb->hds = ntracks;
903 if (!bpb->bsec)
904 bpb->bsec = size;
905
906 return 0;
907 }
908
909 /*
910 * Print out BPB values.
911 */
912 static void
913 print_bpb(struct bpb *bpb)
914 {
915 printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res,
916 bpb->nft);
917 if (bpb->rde)
918 printf(" rde=%u", bpb->rde);
919 if (bpb->sec)
920 printf(" sec=%u", bpb->sec);
921 printf(" mid=%#x", bpb->mid);
922 if (bpb->spf)
923 printf(" spf=%u", bpb->spf);
924 printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid);
925 if (bpb->bsec)
926 printf(" bsec=%u", bpb->bsec);
927 if (!bpb->spf) {
928 printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl);
929 printf(" infs=");
930 printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs);
931 printf(" bkbs=");
932 printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs);
933 }
934 printf("\n");
935 }
936
937 /*
938 * Check a disk geometry value.
939 */
940 static int
941 ckgeom(const char *fname, u_int val, const char *msg)
942 {
943 if (!val) {
944 warnx("%s: no default %s", fname, msg);
945 return -1;
946 }
947 if (val > MAXU16) {
948 warnx("%s: illegal %s", fname, msg);
949 return -1;
950 }
951 return 0;
952 }
953 /*
954 * Check a volume label.
955 */
956 static int
957 oklabel(const char *src)
958 {
959 int c, i;
960
961 for (i = 0; i <= 11; i++) {
962 c = (u_char)*src++;
963 if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c))
964 break;
965 }
966 return i && !c;
967 }
968
969 /*
970 * Make a volume label.
971 */
972 static void
973 mklabel(u_int8_t *dest, const char *src)
974 {
975 int c, i;
976
977 for (i = 0; i < 11; i++) {
978 c = *src ? toupper((unsigned char)*src++) : ' ';
979 *dest++ = !i && c == '\xe5' ? 5 : c;
980 }
981 }
982
983 /*
984 * Copy string, padding with spaces.
985 */
986 static void
987 setstr(u_int8_t *dest, const char *src, size_t len)
988 {
989 while (len--)
990 *dest++ = *src ? *src++ : ' ';
991 }
992
993 static void
994 infohandler(int sig)
995 {
996 got_siginfo = 1;
997 }
MINIX 3 (repo.or.cz mirror)