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usched: Allow process to change self cpu affinity
[dragonfly.git] / sbin / newfs_msdos / mkfs_msdos.c
bloba7c6796ec26896e65d9921401a31ba836223edb3
1 /*
2 * Copyright (c) 1998 Robert Nordier
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
21 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
23 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
25 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD: head/sbin/newfs_msdos/mkfs_msdos.c 305075 2016-08-30 18:01:26Z imp $
28 */
29
30 #include <sys/param.h>
31 #include <sys/disklabel32.h>
32 #include <sys/diskmbr.h>
33 #include <sys/diskslice.h>
34 #include <sys/mount.h>
35 #include <sys/stat.h>
36 #include <sys/time.h>
37
38 #include <machine/ioctl_fd.h>
39
40 #include <ctype.h>
41 #include <disktab.h>
42 #include <err.h>
43 #include <errno.h>
44 #include <fcntl.h>
45 #include <inttypes.h>
46 #include <paths.h>
47 #include <signal.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <time.h>
52 #include <unistd.h>
53
54 #include "mkfs_msdos.h"
55
56 #define MAXU16 0xffff /* maximum unsigned 16-bit quantity */
57 #define BPN 4 /* bits per nibble */
58 #define NPB 2 /* nibbles per byte */
59
60 #define MINBPS 512 /* minimum bytes per sector */
61 #define MAXSPC 128 /* maximum sectors per cluster */
62 #define MAXNFT 16 /* maximum number of FATs */
63 #define DEFBLK 4096 /* default block size */
64 #define DEFBLK16 2048 /* default block size FAT16 */
65 #define DEFRDE 512 /* default root directory entries */
66 #define RESFTE 2 /* reserved FAT entries */
67 #define MINCLS12 1U /* minimum FAT12 clusters */
68 #define MINCLS16 0xff5U /* minimum FAT16 clusters */
69 #define MINCLS32 0xfff5U /* minimum FAT32 clusters */
70 #define MAXCLS12 0xff4U /* maximum FAT12 clusters */
71 #define MAXCLS16 0xfff4U /* maximum FAT16 clusters */
72 #define MAXCLS32 0xffffff4U /* maximum FAT32 clusters */
73
74 #define mincls(fat) ((fat) == 12 ? MINCLS12 : \
75 (fat) == 16 ? MINCLS16 : \
76 MINCLS32)
77
78 #define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \
79 (fat) == 16 ? MAXCLS16 : \
80 MAXCLS32)
81
82 #define mk1(p, x) \
83 (p) = (u_int8_t)(x)
84
85 #define mk2(p, x) \
86 (p)[0] = (u_int8_t)(x), \
87 (p)[1] = (u_int8_t)((x) >> 010)
88
89 #define mk4(p, x) \
90 (p)[0] = (u_int8_t)(x), \
91 (p)[1] = (u_int8_t)((x) >> 010), \
92 (p)[2] = (u_int8_t)((x) >> 020), \
93 (p)[3] = (u_int8_t)((x) >> 030)
94
95 struct bs {
96 u_int8_t bsJump[3]; /* bootstrap entry point */
97 u_int8_t bsOemName[8]; /* OEM name and version */
98 } __packed;
99
100 struct bsbpb {
101 u_int8_t bpbBytesPerSec[2]; /* bytes per sector */
102 u_int8_t bpbSecPerClust; /* sectors per cluster */
103 u_int8_t bpbResSectors[2]; /* reserved sectors */
104 u_int8_t bpbFATs; /* number of FATs */
105 u_int8_t bpbRootDirEnts[2]; /* root directory entries */
106 u_int8_t bpbSectors[2]; /* total sectors */
107 u_int8_t bpbMedia; /* media descriptor */
108 u_int8_t bpbFATsecs[2]; /* sectors per FAT */
109 u_int8_t bpbSecPerTrack[2]; /* sectors per track */
110 u_int8_t bpbHeads[2]; /* drive heads */
111 u_int8_t bpbHiddenSecs[4]; /* hidden sectors */
112 u_int8_t bpbHugeSectors[4]; /* big total sectors */
113 } __packed;
114
115 struct bsxbpb {
116 u_int8_t bpbBigFATsecs[4]; /* big sectors per FAT */
117 u_int8_t bpbExtFlags[2]; /* FAT control flags */
118 u_int8_t bpbFSVers[2]; /* file system version */
119 u_int8_t bpbRootClust[4]; /* root directory start cluster */
120 u_int8_t bpbFSInfo[2]; /* file system info sector */
121 u_int8_t bpbBackup[2]; /* backup boot sector */
122 u_int8_t bpbReserved[12]; /* reserved */
123 } __packed;
124
125 struct bsx {
126 u_int8_t exDriveNumber; /* drive number */
127 u_int8_t exReserved1; /* reserved */
128 u_int8_t exBootSignature; /* extended boot signature */
129 u_int8_t exVolumeID[4]; /* volume ID number */
130 u_int8_t exVolumeLabel[11]; /* volume label */
131 u_int8_t exFileSysType[8]; /* file system type */
132 } __packed;
133
134 struct de {
135 u_int8_t deName[11]; /* name and extension */
136 u_int8_t deAttributes; /* attributes */
137 u_int8_t rsvd[10]; /* reserved */
138 u_int8_t deMTime[2]; /* last-modified time */
139 u_int8_t deMDate[2]; /* last-modified date */
140 u_int8_t deStartCluster[2]; /* starting cluster */
141 u_int8_t deFileSize[4]; /* size */
142 } __packed;
143
144 struct bpb {
145 u_int bpbBytesPerSec; /* bytes per sector */
146 u_int bpbSecPerClust; /* sectors per cluster */
147 u_int bpbResSectors; /* reserved sectors */
148 u_int bpbFATs; /* number of FATs */
149 u_int bpbRootDirEnts; /* root directory entries */
150 u_int bpbSectors; /* total sectors */
151 u_int bpbMedia; /* media descriptor */
152 u_int bpbFATsecs; /* sectors per FAT */
153 u_int bpbSecPerTrack; /* sectors per track */
154 u_int bpbHeads; /* drive heads */
155 u_int bpbHiddenSecs; /* hidden sectors */
156 u_int bpbHugeSectors; /* big total sectors */
157 u_int bpbBigFATsecs; /* big sectors per FAT */
158 u_int bpbRootClust; /* root directory start cluster */
159 u_int bpbFSInfo; /* file system info sector */
160 u_int bpbBackup; /* backup boot sector */
161 };
162
163 #define BPBGAP 0, 0, 0, 0, 0, 0
164
165 static struct {
166 const char *name;
167 struct bpb bpb;
168 } const stdfmt[] = {
169 {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}},
170 {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}},
171 {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}},
172 {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}},
173 {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}},
174 {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}},
175 {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}},
176 {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}},
177 {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}},
178 {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}}
179 };
180
181 static const u_int8_t bootcode[] = {
182 0xfa, /* cli */
183 0x31, 0xc0, /* xor ax,ax */
184 0x8e, 0xd0, /* mov ss,ax */
185 0xbc, 0x00, 0x7c, /* mov sp,7c00h */
186 0xfb, /* sti */
187 0x8e, 0xd8, /* mov ds,ax */
188 0xe8, 0x00, 0x00, /* call $ + 3 */
189 0x5e, /* pop si */
190 0x83, 0xc6, 0x19, /* add si,+19h */
191 0xbb, 0x07, 0x00, /* mov bx,0007h */
192 0xfc, /* cld */
193 0xac, /* lodsb */
194 0x84, 0xc0, /* test al,al */
195 0x74, 0x06, /* jz $ + 8 */
196 0xb4, 0x0e, /* mov ah,0eh */
197 0xcd, 0x10, /* int 10h */
198 0xeb, 0xf5, /* jmp $ - 9 */
199 0x30, 0xe4, /* xor ah,ah */
200 0xcd, 0x16, /* int 16h */
201 0xcd, 0x19, /* int 19h */
202 0x0d, 0x0a,
203 'N', 'o', 'n', '-', 's', 'y', 's', 't',
204 'e', 'm', ' ', 'd', 'i', 's', 'k',
205 0x0d, 0x0a,
206 'P', 'r', 'e', 's', 's', ' ', 'a', 'n',
207 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o',
208 ' ', 'r', 'e', 'b', 'o', 'o', 't',
209 0x0d, 0x0a,
210 0
211 };
212
213 static volatile sig_atomic_t got_siginfo;
214 static void infohandler(int);
215
216 static int check_mounted(const char *, mode_t);
217 static int getstdfmt(const char *, struct bpb *);
218 static int getdiskinfo(int, const char *, const char *, int, struct bpb *);
219 static void print_bpb(struct bpb *);
220 static int ckgeom(const char *, u_int, const char *);
221 static void mklabel(u_int8_t *, const char *);
222 static int oklabel(const char *);
223 static void setstr(u_int8_t *, const char *, size_t);
224
225 int
226 mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op)
227 {
228 char buf[MAXPATHLEN];
229 struct sigaction si_sa;
230 struct stat sb;
231 struct timeval tv;
232 struct bpb bpb;
233 struct tm *tm;
234 struct bs *bs;
235 struct bsbpb *bsbpb;
236 struct bsxbpb *bsxbpb;
237 struct bsx *bsx;
238 struct de *de;
239 u_int8_t *img;
240 const char *bname;
241 ssize_t n;
242 time_t now;
243 u_int fat, bss, rds, cls, dir, lsn, x, x1, x2;
244 int fd, fd1, rv;
245 struct msdos_options o = *op;
246
247 img = NULL;
248 rv = -1;
249
250 if (o.block_size && o.sectors_per_cluster) {
251 warnx("Cannot specify both block size and sectors per cluster");
252 goto done;
253 }
254 if (o.OEM_string && strlen(o.OEM_string) > 8) {
255 warnx("%s: bad OEM string", o.OEM_string);
256 goto done;
257 }
258 if (o.create_size) {
259 if (o.no_create) {
260 warnx("create (-C) is incompatible with -N");
261 goto done;
262 }
263 fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644);
264 if (fd == -1) {
265 warnx("failed to create %s", fname);
266 goto done;
267 }
268 if (ftruncate(fd, o.create_size)) {
269 warnx("failed to initialize %jd bytes", (intmax_t)o.create_size);
270 goto done;
271 }
272 } else if ((fd = open(fname, o.no_create ? O_RDONLY : O_RDWR)) == -1) {
273 warn("%s", fname);
274 goto done;
275 }
276 if (fstat(fd, &sb)) {
277 warn("%s", fname);
278 goto done;
279 }
280 if (o.create_size) {
281 if (!S_ISREG(sb.st_mode))
282 warnx("warning, %s is not a regular file", fname);
283 } else {
284 if (!S_ISCHR(sb.st_mode))
285 warnx("warning, %s is not a character device", fname);
286 }
287 if (!o.no_create)
288 if (check_mounted(fname, sb.st_mode) == -1)
289 goto done;
290 if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) {
291 warnx("cannot seek to %jd", (intmax_t)o.offset);
292 goto done;
293 }
294 memset(&bpb, 0, sizeof(bpb));
295 if (o.floppy) {
296 if (getstdfmt(o.floppy, &bpb) == -1)
297 goto done;
298 bpb.bpbHugeSectors = bpb.bpbSectors;
299 bpb.bpbSectors = 0;
300 bpb.bpbBigFATsecs = bpb.bpbFATsecs;
301 bpb.bpbFATsecs = 0;
302 }
303 if (o.drive_heads)
304 bpb.bpbHeads = o.drive_heads;
305 if (o.sectors_per_track)
306 bpb.bpbSecPerTrack = o.sectors_per_track;
307 if (o.bytes_per_sector)
308 bpb.bpbBytesPerSec = o.bytes_per_sector;
309 if (o.size)
310 bpb.bpbHugeSectors = o.size;
311 if (o.hidden_sectors_set)
312 bpb.bpbHiddenSecs = o.hidden_sectors;
313 if (!(o.floppy || (o.drive_heads && o.sectors_per_track &&
314 o.bytes_per_sector && o.size && o.hidden_sectors_set))) {
315 getdiskinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb);
316 bpb.bpbHugeSectors -= (o.offset / bpb.bpbBytesPerSec);
317 if (bpb.bpbSecPerClust == 0) { /* set defaults */
318 if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */
319 bpb.bpbSecPerClust = 1;
320 else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */
321 bpb.bpbSecPerClust = 8;
322 else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */
323 bpb.bpbSecPerClust = 16;
324 else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */
325 bpb.bpbSecPerClust = 32;
326 else
327 bpb.bpbSecPerClust = 64; /* otherwise 32k */
328 }
329 }
330 if (!powerof2(bpb.bpbBytesPerSec)) {
331 warnx("bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec);
332 goto done;
333 }
334 if (bpb.bpbBytesPerSec < MINBPS) {
335 warnx("bytes/sector (%u) is too small; minimum is %u",
336 bpb.bpbBytesPerSec, MINBPS);
337 goto done;
338 }
339
340 if (o.volume_label && !oklabel(o.volume_label)) {
341 warnx("%s: bad volume label", o.volume_label);
342 goto done;
343 }
344 if (!(fat = o.fat_type)) {
345 if (o.floppy)
346 fat = 12;
347 else if (!o.directory_entries && (o.info_sector || o.backup_sector))
348 fat = 32;
349 }
350 if ((fat == 32 && o.directory_entries) || (fat != 32 && (o.info_sector || o.backup_sector))) {
351 warnx("-%c is not a legal FAT%s option",
352 fat == 32 ? 'e' : o.info_sector ? 'i' : 'k',
353 fat == 32 ? "32" : "12/16");
354 goto done;
355 }
356 if (o.floppy && fat == 32)
357 bpb.bpbRootDirEnts = 0;
358 if (fat != 0 && fat != 12 && fat != 16 && fat != 32) {
359 warnx("%d: bad FAT type", fat);
360 goto done;
361 }
362
363 if (o.block_size) {
364 if (!powerof2(o.block_size)) {
365 warnx("block size (%u) is not a power of 2", o.block_size);
366 goto done;
367 }
368 if (o.block_size < bpb.bpbBytesPerSec) {
369 warnx("block size (%u) is too small; minimum is %u",
370 o.block_size, bpb.bpbBytesPerSec);
371 goto done;
372 }
373 if (o.block_size > bpb.bpbBytesPerSec * MAXSPC) {
374 warnx("block size (%u) is too large; maximum is %u",
375 o.block_size, bpb.bpbBytesPerSec * MAXSPC);
376 goto done;
377 }
378 bpb.bpbSecPerClust = o.block_size / bpb.bpbBytesPerSec;
379 }
380 if (o.sectors_per_cluster) {
381 if (!powerof2(o.sectors_per_cluster)) {
382 warnx("sectors/cluster (%u) is not a power of 2",
383 o.sectors_per_cluster);
384 goto done;
385 }
386 bpb.bpbSecPerClust = o.sectors_per_cluster;
387 }
388 if (o.reserved_sectors)
389 bpb.bpbResSectors = o.reserved_sectors;
390 if (o.num_FAT) {
391 if (o.num_FAT > MAXNFT) {
392 warnx("number of FATs (%u) is too large; maximum is %u",
393 o.num_FAT, MAXNFT);
394 goto done;
395 }
396 bpb.bpbFATs = o.num_FAT;
397 }
398 if (o.directory_entries)
399 bpb.bpbRootDirEnts = o.directory_entries;
400 if (o.media_descriptor_set) {
401 if (o.media_descriptor < 0xf0) {
402 warnx("illegal media descriptor (%#x)", o.media_descriptor);
403 goto done;
404 }
405 bpb.bpbMedia = o.media_descriptor;
406 }
407 if (o.sectors_per_fat)
408 bpb.bpbBigFATsecs = o.sectors_per_fat;
409 if (o.info_sector)
410 bpb.bpbFSInfo = o.info_sector;
411 if (o.backup_sector)
412 bpb.bpbBackup = o.backup_sector;
413 bss = 1;
414 bname = NULL;
415 fd1 = -1;
416 if (o.bootstrap) {
417 bname = o.bootstrap;
418 if (!strchr(bname, '/')) {
419 snprintf(buf, sizeof(buf), "/boot/%s", bname);
420 if (!(bname = strdup(buf))) {
421 warn(NULL);
422 goto done;
423 }
424 }
425 if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) {
426 warn("%s", bname);
427 goto done;
428 }
429 if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bpbBytesPerSec ||
430 sb.st_size < bpb.bpbBytesPerSec ||
431 sb.st_size > bpb.bpbBytesPerSec * MAXU16) {
432 warnx("%s: inappropriate file type or format", bname);
433 goto done;
434 }
435 bss = sb.st_size / bpb.bpbBytesPerSec;
436 }
437 if (!bpb.bpbFATs)
438 bpb.bpbFATs = 2;
439 if (!fat) {
440 if (bpb.bpbHugeSectors < (bpb.bpbResSectors ? bpb.bpbResSectors : bss) +
441 howmany((RESFTE + (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1)) *
442 (bpb.bpbSecPerClust ? 16 : 12) / BPN,
443 bpb.bpbBytesPerSec * NPB) *
444 bpb.bpbFATs +
445 howmany(bpb.bpbRootDirEnts ? bpb.bpbRootDirEnts : DEFRDE,
446 bpb.bpbBytesPerSec / sizeof(struct de)) +
447 (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1) *
448 (bpb.bpbSecPerClust ? bpb.bpbSecPerClust :
449 howmany(DEFBLK, bpb.bpbBytesPerSec)))
450 fat = 12;
451 else if (bpb.bpbRootDirEnts || bpb.bpbHugeSectors <
452 (bpb.bpbResSectors ? bpb.bpbResSectors : bss) +
453 howmany((RESFTE + MAXCLS16) * 2, bpb.bpbBytesPerSec) *
454 bpb.bpbFATs +
455 howmany(DEFRDE, bpb.bpbBytesPerSec / sizeof(struct de)) +
456 (MAXCLS16 + 1) *
457 (bpb.bpbSecPerClust ? bpb.bpbSecPerClust :
458 howmany(8192, bpb.bpbBytesPerSec)))
459 fat = 16;
460 else
461 fat = 32;
462 }
463 x = bss;
464 if (fat == 32) {
465 if (!bpb.bpbFSInfo) {
466 if (x == MAXU16 || x == bpb.bpbBackup) {
467 warnx("no room for info sector");
468 goto done;
469 }
470 bpb.bpbFSInfo = x;
471 }
472 if (bpb.bpbFSInfo != MAXU16 && x <= bpb.bpbFSInfo)
473 x = bpb.bpbFSInfo + 1;
474 if (!bpb.bpbBackup) {
475 if (x == MAXU16) {
476 warnx("no room for backup sector");
477 goto done;
478 }
479 bpb.bpbBackup = x;
480 } else if (bpb.bpbBackup != MAXU16 && bpb.bpbBackup == bpb.bpbFSInfo) {
481 warnx("backup sector would overwrite info sector");
482 goto done;
483 }
484 if (bpb.bpbBackup != MAXU16 && x <= bpb.bpbBackup)
485 x = bpb.bpbBackup + 1;
486 }
487 if (!bpb.bpbResSectors)
488 bpb.bpbResSectors = fat == 32 ?
489 MAX(x, MAX(16384 / bpb.bpbBytesPerSec, 4)) : x;
490 else if (bpb.bpbResSectors < x) {
491 warnx("too few reserved sectors (need %d have %d)", x,
492 bpb.bpbResSectors);
493 goto done;
494 }
495 if (fat != 32 && !bpb.bpbRootDirEnts)
496 bpb.bpbRootDirEnts = DEFRDE;
497 rds = howmany(bpb.bpbRootDirEnts, bpb.bpbBytesPerSec / sizeof(struct de));
498 if (!bpb.bpbSecPerClust)
499 for (bpb.bpbSecPerClust = howmany(fat == 16 ? DEFBLK16 :
500 DEFBLK, bpb.bpbBytesPerSec);
501 bpb.bpbSecPerClust < MAXSPC &&
502 bpb.bpbResSectors +
503 howmany((RESFTE + maxcls(fat)) * (fat / BPN),
504 bpb.bpbBytesPerSec * NPB) *
505 bpb.bpbFATs +
506 rds +
507 (u_int64_t) (maxcls(fat) + 1) *
508 bpb.bpbSecPerClust <= bpb.bpbHugeSectors;
509 bpb.bpbSecPerClust <<= 1)
510 continue;
511 if (fat != 32 && bpb.bpbBigFATsecs > MAXU16) {
512 warnx("too many sectors/FAT for FAT12/16");
513 goto done;
514 }
515 x1 = bpb.bpbResSectors + rds;
516 x = bpb.bpbBigFATsecs ? bpb.bpbBigFATsecs : 1;
517 if (x1 + (u_int64_t)x * bpb.bpbFATs > bpb.bpbHugeSectors) {
518 warnx("meta data exceeds file system size");
519 goto done;
520 }
521 x1 += x * bpb.bpbFATs;
522 x = (u_int64_t)(bpb.bpbHugeSectors - x1) * bpb.bpbBytesPerSec * NPB /
523 (bpb.bpbSecPerClust * bpb.bpbBytesPerSec * NPB + fat /
524 BPN * bpb.bpbFATs);
525 x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN),
526 bpb.bpbBytesPerSec * NPB);
527 if (!bpb.bpbBigFATsecs) {
528 bpb.bpbBigFATsecs = x2;
529 x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs;
530 }
531 cls = (bpb.bpbHugeSectors - x1) / bpb.bpbSecPerClust;
532 x = (u_int64_t)bpb.bpbBigFATsecs * bpb.bpbBytesPerSec * NPB / (fat / BPN) -
533 RESFTE;
534 if (cls > x)
535 cls = x;
536 if (bpb.bpbBigFATsecs < x2)
537 warnx("warning: sectors/FAT limits file system to %u clusters",
538 cls);
539 if (cls < mincls(fat)) {
540 warnx("%u clusters too few clusters for FAT%u, need %u", cls, fat,
541 mincls(fat));
542 goto done;
543 }
544 if (cls > maxcls(fat)) {
545 cls = maxcls(fat);
546 bpb.bpbHugeSectors = x1 + (cls + 1) * bpb.bpbSecPerClust - 1;
547 warnx("warning: FAT type limits file system to %u sectors",
548 bpb.bpbHugeSectors);
549 }
550 printf("%s: %u sector%s in %u FAT%u cluster%s "
551 "(%u bytes/cluster)\n", fname, cls * bpb.bpbSecPerClust,
552 cls * bpb.bpbSecPerClust == 1 ? "" : "s", cls, fat,
553 cls == 1 ? "" : "s", bpb.bpbBytesPerSec * bpb.bpbSecPerClust);
554 if (!bpb.bpbMedia)
555 bpb.bpbMedia = !bpb.bpbHiddenSecs ? 0xf0 : 0xf8;
556 if (fat == 32)
557 bpb.bpbRootClust = RESFTE;
558 if (bpb.bpbHugeSectors <= MAXU16) {
559 bpb.bpbSectors = bpb.bpbHugeSectors;
560 bpb.bpbHugeSectors = 0;
561 }
562 if (fat != 32) {
563 bpb.bpbFATsecs = bpb.bpbBigFATsecs;
564 bpb.bpbBigFATsecs = 0;
565 }
566 print_bpb(&bpb);
567 if (!o.no_create) {
568 gettimeofday(&tv, NULL);
569 now = tv.tv_sec;
570 tm = localtime(&now);
571 if (!(img = malloc(bpb.bpbBytesPerSec))) {
572 warn(NULL);
573 goto done;
574 }
575 dir = bpb.bpbResSectors + (bpb.bpbFATsecs ? bpb.bpbFATsecs :
576 bpb.bpbBigFATsecs) * bpb.bpbFATs;
577 memset(&si_sa, 0, sizeof(si_sa));
578 si_sa.sa_handler = infohandler;
579 if (sigaction(SIGINFO, &si_sa, NULL) == -1) {
580 warn("sigaction SIGINFO");
581 goto done;
582 }
583 for (lsn = 0; lsn < dir + (fat == 32 ? bpb.bpbSecPerClust : rds); lsn++) {
584 if (got_siginfo) {
585 fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n",
586 fname, lsn,
587 (dir + (fat == 32 ? bpb.bpbSecPerClust: rds)),
588 (lsn * 100) / (dir +
589 (fat == 32 ? bpb.bpbSecPerClust: rds)));
590 got_siginfo = 0;
591 }
592 x = lsn;
593 if (o.bootstrap &&
594 fat == 32 && bpb.bpbBackup != MAXU16 &&
595 bss <= bpb.bpbBackup && x >= bpb.bpbBackup) {
596 x -= bpb.bpbBackup;
597 if (!x && lseek(fd1, o.offset, SEEK_SET)) {
598 warn("%s", bname);
599 goto done;
600 }
601 }
602 if (o.bootstrap && x < bss) {
603 if ((n = read(fd1, img, bpb.bpbBytesPerSec)) == -1) {
604 warn("%s", bname);
605 goto done;
606 }
607 if ((unsigned)n != bpb.bpbBytesPerSec) {
608 warnx("%s: can't read sector %u", bname, x);
609 goto done;
610 }
611 } else
612 memset(img, 0, bpb.bpbBytesPerSec);
613 if (!lsn ||
614 (fat == 32 && bpb.bpbBackup != MAXU16 &&
615 lsn == bpb.bpbBackup)) {
616 x1 = sizeof(struct bs);
617 bsbpb = (struct bsbpb *)(img + x1);
618 mk2(bsbpb->bpbBytesPerSec, bpb.bpbBytesPerSec);
619 mk1(bsbpb->bpbSecPerClust, bpb.bpbSecPerClust);
620 mk2(bsbpb->bpbResSectors, bpb.bpbResSectors);
621 mk1(bsbpb->bpbFATs, bpb.bpbFATs);
622 mk2(bsbpb->bpbRootDirEnts, bpb.bpbRootDirEnts);
623 mk2(bsbpb->bpbSectors, bpb.bpbSectors);
624 mk1(bsbpb->bpbMedia, bpb.bpbMedia);
625 mk2(bsbpb->bpbFATsecs, bpb.bpbFATsecs);
626 mk2(bsbpb->bpbSecPerTrack, bpb.bpbSecPerTrack);
627 mk2(bsbpb->bpbHeads, bpb.bpbHeads);
628 mk4(bsbpb->bpbHiddenSecs, bpb.bpbHiddenSecs);
629 mk4(bsbpb->bpbHugeSectors, bpb.bpbHugeSectors);
630 x1 += sizeof(struct bsbpb);
631 if (fat == 32) {
632 bsxbpb = (struct bsxbpb *)(img + x1);
633 mk4(bsxbpb->bpbBigFATsecs, bpb.bpbBigFATsecs);
634 mk2(bsxbpb->bpbExtFlags, 0);
635 mk2(bsxbpb->bpbFSVers, 0);
636 mk4(bsxbpb->bpbRootClust, bpb.bpbRootClust);
637 mk2(bsxbpb->bpbFSInfo, bpb.bpbFSInfo);
638 mk2(bsxbpb->bpbBackup, bpb.bpbBackup);
639 x1 += sizeof(struct bsxbpb);
640 }
641 bsx = (struct bsx *)(img + x1);
642 mk1(bsx->exBootSignature, 0x29);
643 if (o.volume_id_set)
644 x = o.volume_id;
645 else
646 x = (((u_int)(1 + tm->tm_mon) << 8 |
647 (u_int)tm->tm_mday) +
648 ((u_int)tm->tm_sec << 8 |
649 (u_int)(tv.tv_usec / 10))) << 16 |
650 ((u_int)(1900 + tm->tm_year) +
651 ((u_int)tm->tm_hour << 8 |
652 (u_int)tm->tm_min));
653 mk4(bsx->exVolumeID, x);
654 mklabel(bsx->exVolumeLabel, o.volume_label ? o.volume_label : "NO NAME");
655 snprintf(buf, sizeof(buf), "FAT%u", fat);
656 setstr(bsx->exFileSysType, buf, sizeof(bsx->exFileSysType));
657 if (!o.bootstrap) {
658 x1 += sizeof(struct bsx);
659 bs = (struct bs *)img;
660 mk1(bs->bsJump[0], 0xeb);
661 mk1(bs->bsJump[1], x1 - 2);
662 mk1(bs->bsJump[2], 0x90);
663 setstr(bs->bsOemName, o.OEM_string ? o.OEM_string : "BSD4.4 ",
664 sizeof(bs->bsOemName));
665 memcpy(img + x1, bootcode, sizeof(bootcode));
666 mk2(img + MINBPS - 2, DOSMAGIC);
667 }
668 } else if (fat == 32 && bpb.bpbFSInfo != MAXU16 &&
669 (lsn == bpb.bpbFSInfo ||
670 (bpb.bpbBackup != MAXU16 &&
671 lsn == bpb.bpbBackup + bpb.bpbFSInfo))) {
672 mk4(img, 0x41615252);
673 mk4(img + MINBPS - 28, 0x61417272);
674 mk4(img + MINBPS - 24, 0xffffffff);
675 mk4(img + MINBPS - 20, bpb.bpbRootClust);
676 mk2(img + MINBPS - 2, DOSMAGIC);
677 } else if (lsn >= bpb.bpbResSectors && lsn < dir &&
678 !((lsn - bpb.bpbResSectors) %
679 (bpb.bpbFATsecs ? bpb.bpbFATsecs :
680 bpb.bpbBigFATsecs))) {
681 mk1(img[0], bpb.bpbMedia);
682 for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++)
683 mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff);
684 } else if (lsn == dir && o.volume_label) {
685 de = (struct de *)img;
686 mklabel(de->deName, o.volume_label);
687 mk1(de->deAttributes, 050);
688 x = (u_int)tm->tm_hour << 11 |
689 (u_int)tm->tm_min << 5 |
690 (u_int)tm->tm_sec >> 1;
691 mk2(de->deMTime, x);
692 x = (u_int)(tm->tm_year - 80) << 9 |
693 (u_int)(tm->tm_mon + 1) << 5 |
694 (u_int)tm->tm_mday;
695 mk2(de->deMDate, x);
696 }
697 if ((n = write(fd, img, bpb.bpbBytesPerSec)) == -1) {
698 warn("%s", fname);
699 goto done;
700 }
701 if ((unsigned)n != bpb.bpbBytesPerSec) {
702 warnx("%s: can't write sector %u", fname, lsn);
703 goto done;
704 }
705 }
706 }
707 rv = 0;
708 done:
709 free(img);
710
711 return rv;
712 }
713
714 /*
715 * return -1 with error if file system is mounted.
716 */
717 static int
718 check_mounted(const char *fname, mode_t mode)
719 {
720 struct statfs *mp;
721 const char *s1, *s2;
722 size_t len;
723 int n, r;
724
725 if (!(n = getmntinfo(&mp, MNT_NOWAIT))) {
726 warn("getmntinfo");
727 return -1;
728 }
729 len = strlen(_PATH_DEV);
730 s1 = fname;
731 if (!strncmp(s1, _PATH_DEV, len))
732 s1 += len;
733 r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
734 for (; n--; mp++) {
735 s2 = mp->f_mntfromname;
736 if (!strncmp(s2, _PATH_DEV, len))
737 s2 += len;
738 if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) ||
739 !strcmp(s1, s2)) {
740 warnx("%s is mounted on %s", fname, mp->f_mntonname);
741 return -1;
742 }
743 }
744 return 0;
745 }
746
747 /*
748 * Get a standard format.
749 */
750 static int
751 getstdfmt(const char *fmt, struct bpb *bpb)
752 {
753 u_int x, i;
754
755 x = NELEM(stdfmt);
756 for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++);
757 if (i == x) {
758 warnx("%s: unknown standard format", fmt);
759 return -1;
760 }
761 *bpb = stdfmt[i].bpb;
762 return 0;
763 }
764
765 /*
766 * Get disk slice, partition, and geometry information.
767 */
768 static int
769 getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag,
770 struct bpb *bpb)
771 {
772 struct disklabel32 *lp, dlp;
773 struct fd_type type;
774 struct partinfo pi;
775 off_t ms = 0, hs = 0;
776
777 lp = NULL;
778
779 /* If the user specified a disk type, try to use that */
780 if (dtype != NULL) {
781 lp = getdiskbyname(dtype);
782 }
783
784 /* Maybe it's a floppy drive */
785 if (lp == NULL) {
786 if (ioctl(fd, DIOCGPART, &pi) == -1) {
787 struct stat st;
788
789 if (fstat(fd, &st))
790 err(1, "cannot get disk size");
791 /* create a fake geometry for a file image */
792 ms = st.st_size;
793 dlp.d_secsize = 512;
794 dlp.d_nsectors = 63;
795 dlp.d_ntracks = 255;
796 dlp.d_secperunit = ms / dlp.d_secsize;
797 lp = &dlp;
798 } else if (ioctl(fd, FD_GTYPE, &type) != -1) {
799 ms = pi.media_size;
800 dlp.d_secsize = 128 << type.secsize;
801 dlp.d_nsectors = type.sectrac;
802 dlp.d_ntracks = type.heads;
803 dlp.d_secperunit = ms / dlp.d_secsize;
804 lp = &dlp;
805 } else {
806 ms = pi.media_size;
807 }
808 }
809
810 /* Maybe it's a fixed drive */
811 if (lp == NULL) {
812 if (ioctl(fd, DIOCGPART, &pi) == - 1)
813 err(1, "cannot get disk information");
814 dlp.d_secsize = pi.media_blksize;
815 dlp.d_nsectors = pi.d_secpertrack;
816 dlp.d_ntracks = pi.d_nheads;
817 if (bpb->bpbBytesPerSec)
818 dlp.d_secsize = bpb->bpbBytesPerSec;
819
820 dlp.d_secperunit = ms / dlp.d_secsize;
821
822 hs = (ms / dlp.d_secsize) - dlp.d_secperunit;
823 lp = &dlp;
824 }
825
826 if (bpb->bpbBytesPerSec == 0) {
827 if (ckgeom(fname, lp->d_secsize, "bytes/sector") == -1)
828 return -1;
829 bpb->bpbBytesPerSec = lp->d_secsize;
830 }
831 if (bpb->bpbSecPerTrack == 0) {
832 if (ckgeom(fname, lp->d_nsectors, "sectors/track") == -1)
833 return -1;
834 bpb->bpbSecPerTrack = lp->d_nsectors;
835 }
836 if (bpb->bpbHeads == 0) {
837 if (ckgeom(fname, lp->d_ntracks, "drive heads") == -1)
838 return -1;
839 bpb->bpbHeads = lp->d_ntracks;
840 }
841 if (bpb->bpbHugeSectors == 0)
842 bpb->bpbHugeSectors = lp->d_secperunit;
843 if (bpb->bpbHiddenSecs == 0)
844 bpb->bpbHiddenSecs = hs;
845 return 0;
846 }
847
848 /*
849 * Print out BPB values.
850 */
851 static void
852 print_bpb(struct bpb *bpb)
853 {
854 printf("BytesPerSec=%u SecPerClust=%u ResSectors=%u FATs=%u",
855 bpb->bpbBytesPerSec, bpb->bpbSecPerClust, bpb->bpbResSectors,
856 bpb->bpbFATs);
857 if (bpb->bpbRootDirEnts)
858 printf(" RootDirEnts=%u", bpb->bpbRootDirEnts);
859 if (bpb->bpbSectors)
860 printf(" Sectors=%u", bpb->bpbSectors);
861 printf(" Media=%#x", bpb->bpbMedia);
862 if (bpb->bpbFATsecs)
863 printf(" FATsecs=%u", bpb->bpbFATsecs);
864 printf(" SecPerTrack=%u Heads=%u HiddenSecs=%u", bpb->bpbSecPerTrack,
865 bpb->bpbHeads, bpb->bpbHiddenSecs);
866 if (bpb->bpbHugeSectors)
867 printf(" HugeSectors=%u", bpb->bpbHugeSectors);
868 if (!bpb->bpbFATsecs) {
869 printf(" FATsecs=%u RootCluster=%u", bpb->bpbBigFATsecs,
870 bpb->bpbRootClust);
871 printf(" FSInfo=");
872 printf(bpb->bpbFSInfo == MAXU16 ? "%#x" : "%u", bpb->bpbFSInfo);
873 printf(" Backup=");
874 printf(bpb->bpbBackup == MAXU16 ? "%#x" : "%u", bpb->bpbBackup);
875 }
876 printf("\n");
877 }
878
879 /*
880 * Check a disk geometry value.
881 */
882 static int
883 ckgeom(const char *fname, u_int val, const char *msg)
884 {
885 if (!val) {
886 warnx("%s: no default %s", fname, msg);
887 return -1;
888 }
889 if (val > MAXU16) {
890 warnx("%s: illegal %s %d", fname, msg, val);
891 return -1;
892 }
893 return 0;
894 }
895
896 /*
897 * Check a volume label.
898 */
899 static int
900 oklabel(const char *src)
901 {
902 int c, i;
903
904 for (i = 0; i <= 11; i++) {
905 c = (u_char)*src++;
906 if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c))
907 break;
908 }
909 return i && !c;
910 }
911
912 /*
913 * Make a volume label.
914 */
915 static void
916 mklabel(u_int8_t *dest, const char *src)
917 {
918 int c, i;
919
920 for (i = 0; i < 11; i++) {
921 c = *src ? toupper(*src++) : ' ';
922 *dest++ = !i && c == '\xe5' ? 5 : c;
923 }
924 }
925
926 /*
927 * Copy string, padding with spaces.
928 */
929 static void
930 setstr(u_int8_t *dest, const char *src, size_t len)
931 {
932 while (len--)
933 *dest++ = *src ? *src++ : ' ';
934 }
935
936 static void
937 infohandler(int sig __unused)
938 {
939
940 got_siginfo = 1;
941 }
DragonFly BSD