File: | src/sbin/newfs_msdos/newfs_msdos.c |
Warning: | line 727, column 5 Value stored to 's1' is never read |
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1 | /* $OpenBSD: newfs_msdos.c,v 1.28 2021/07/11 15:39:58 kettenis 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 | #include <sys/param.h> /* powerof2 */ |
31 | #include <sys/stat.h> |
32 | #include <sys/disklabel.h> |
33 | #include <sys/ioctl.h> |
34 | #include <sys/dkio.h> |
35 | #include <sys/mount.h> |
36 | |
37 | #include <ctype.h> |
38 | #include <err.h> |
39 | #include <errno(*__errno()).h> |
40 | #include <fcntl.h> |
41 | #include <paths.h> |
42 | #include <stdio.h> |
43 | #include <stdlib.h> |
44 | #include <string.h> |
45 | #include <unistd.h> |
46 | #include <limits.h> |
47 | #include <util.h> |
48 | |
49 | #define MINIMUM(a, b)(((a) < (b)) ? (a) : (b)) (((a) < (b)) ? (a) : (b)) |
50 | #define MAXIMUM(a, b)(((a) > (b)) ? (a) : (b)) (((a) > (b)) ? (a) : (b)) |
51 | |
52 | #define MAXU160xffff 0xffff /* maximum unsigned 16-bit quantity */ |
53 | #define BPN4 4 /* bits per nibble */ |
54 | #define NPB2 2 /* nibbles per byte */ |
55 | |
56 | #define DOSMAGIC0xaa55 0xaa55 /* DOS magic number */ |
57 | #define MINBPS512 512 /* minimum bytes per sector */ |
58 | #define MAXSPC128 128 /* maximum sectors per cluster */ |
59 | #define MAXNFT16 16 /* maximum number of FATs */ |
60 | #define DEFBLK4096 4096 /* default block size */ |
61 | #define DEFBLK162048 2048 /* default block size FAT16 */ |
62 | #define DEFRDE512 512 /* default root directory entries */ |
63 | #define RESFTE2 2 /* reserved FAT entries */ |
64 | #define MINCLS121 1 /* minimum FAT12 clusters */ |
65 | #define MINCLS160xff5 0xff5 /* minimum FAT16 clusters */ |
66 | #define MINCLS320xfff5 0xfff5 /* minimum FAT32 clusters */ |
67 | #define MAXCLS120xff4 0xff4 /* maximum FAT12 clusters */ |
68 | #define MAXCLS160xfff4 0xfff4 /* maximum FAT16 clusters */ |
69 | #define MAXCLS320xffffff4 0xffffff4 /* maximum FAT32 clusters */ |
70 | |
71 | #define mincls(fat)((fat) == 12 ? 1 : (fat) == 16 ? 0xff5 : 0xfff5) ((fat) == 12 ? MINCLS121 : \ |
72 | (fat) == 16 ? MINCLS160xff5 : \ |
73 | MINCLS320xfff5) |
74 | |
75 | #define maxcls(fat)((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4) ((fat) == 12 ? MAXCLS120xff4 : \ |
76 | (fat) == 16 ? MAXCLS160xfff4 : \ |
77 | MAXCLS320xffffff4) |
78 | |
79 | #define mk1(p, x)(p) = (u_int8_t)(x) \ |
80 | (p) = (u_int8_t)(x) |
81 | |
82 | #define mk2(p, x)(p)[0] = (u_int8_t)(x), (p)[1] = (u_int8_t)((x) >> 010) \ |
83 | (p)[0] = (u_int8_t)(x), \ |
84 | (p)[1] = (u_int8_t)((x) >> 010) |
85 | |
86 | #define mk4(p, x)(p)[0] = (u_int8_t)(x), (p)[1] = (u_int8_t)((x) >> 010) , (p)[2] = (u_int8_t)((x) >> 020), (p)[3] = (u_int8_t)( (x) >> 030) \ |
87 | (p)[0] = (u_int8_t)(x), \ |
88 | (p)[1] = (u_int8_t)((x) >> 010), \ |
89 | (p)[2] = (u_int8_t)((x) >> 020), \ |
90 | (p)[3] = (u_int8_t)((x) >> 030) |
91 | |
92 | #define argto1(arg, lo, msg)argtou(arg, lo, 0xff, msg) argtou(arg, lo, 0xff, msg) |
93 | #define argto2(arg, lo, msg)argtou(arg, lo, 0xffff, msg) argtou(arg, lo, 0xffff, msg) |
94 | #define argto4(arg, lo, msg)argtou(arg, lo, 0xffffffff, msg) argtou(arg, lo, 0xffffffff, msg) |
95 | #define argtox(arg, lo, msg)argtou(arg, lo, (2147483647 *2U +1U), msg) argtou(arg, lo, UINT_MAX(2147483647 *2U +1U), msg) |
96 | |
97 | struct bs { |
98 | u_int8_t jmp[3]; /* bootstrap entry point */ |
99 | u_int8_t oem[8]; /* OEM name and version */ |
100 | }; |
101 | |
102 | struct bsbpb { |
103 | u_int8_t bps[2]; /* bytes per sector */ |
104 | u_int8_t spc; /* sectors per cluster */ |
105 | u_int8_t res[2]; /* reserved sectors */ |
106 | u_int8_t nft; /* number of FATs */ |
107 | u_int8_t rde[2]; /* root directory entries */ |
108 | u_int8_t sec[2]; /* total sectors */ |
109 | u_int8_t mid; /* media descriptor */ |
110 | u_int8_t spf[2]; /* sectors per FAT */ |
111 | u_int8_t spt[2]; /* sectors per track */ |
112 | u_int8_t hds[2]; /* drive heads */ |
113 | u_int8_t hid[4]; /* hidden sectors */ |
114 | u_int8_t bsec[4]; /* big total sectors */ |
115 | }; |
116 | |
117 | struct bsxbpb { |
118 | u_int8_t bspf[4]; /* big sectors per FAT */ |
119 | u_int8_t xflg[2]; /* FAT control flags */ |
120 | u_int8_t vers[2]; /* file system version */ |
121 | u_int8_t rdcl[4]; /* root directory start cluster */ |
122 | u_int8_t infs[2]; /* file system info sector */ |
123 | u_int8_t bkbs[2]; /* backup boot sector */ |
124 | u_int8_t rsvd[12]; /* reserved */ |
125 | }; |
126 | |
127 | struct bsx { |
128 | u_int8_t drv; /* drive number */ |
129 | u_int8_t rsvd; /* reserved */ |
130 | u_int8_t sig; /* extended boot signature */ |
131 | u_int8_t volid[4]; /* volume ID number */ |
132 | u_int8_t label[11]; /* volume label */ |
133 | u_int8_t type[8]; /* file system type */ |
134 | }; |
135 | |
136 | struct de { |
137 | u_int8_t namext[11]; /* name and extension */ |
138 | u_int8_t attr; /* attributes */ |
139 | u_int8_t rsvd[10]; /* reserved */ |
140 | u_int8_t time[2]; /* creation time */ |
141 | u_int8_t date[2]; /* creation date */ |
142 | u_int8_t clus[2]; /* starting cluster */ |
143 | u_int8_t size[4]; /* size */ |
144 | }; |
145 | |
146 | struct bpb { |
147 | u_int bps; /* bytes per sector */ |
148 | u_int spc; /* sectors per cluster */ |
149 | u_int res; /* reserved sectors */ |
150 | u_int nft; /* number of FATs */ |
151 | u_int rde; /* root directory entries */ |
152 | u_int sec; /* total sectors */ |
153 | u_int mid; /* media descriptor */ |
154 | u_int spf; /* sectors per FAT */ |
155 | u_int spt; /* sectors per track */ |
156 | u_int hds; /* drive heads */ |
157 | u_int hid; /* hidden sectors */ |
158 | u_int bsec; /* big total sectors */ |
159 | u_int bspf; /* big sectors per FAT */ |
160 | u_int rdcl; /* root directory start cluster */ |
161 | u_int infs; /* file system info sector */ |
162 | u_int bkbs; /* backup boot sector */ |
163 | }; |
164 | |
165 | static struct { |
166 | const char *name; |
167 | struct bpb bpb; |
168 | } stdfmt[] = { |
169 | {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1}}, |
170 | {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1}}, |
171 | {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2}}, |
172 | {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2}}, |
173 | {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2}}, |
174 | {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2}}, |
175 | {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2}}, |
176 | {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2}} |
177 | }; |
178 | |
179 | static u_int8_t bootcode[] = { |
180 | 0xfa, /* cli */ |
181 | 0x31, 0xc0, /* xor ax,ax */ |
182 | 0x8e, 0xd0, /* mov ss,ax */ |
183 | 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ |
184 | 0xfb, /* sti */ |
185 | 0x8e, 0xd8, /* mov ds,ax */ |
186 | 0xe8, 0x00, 0x00, /* call $ + 3 */ |
187 | 0x5e, /* pop si */ |
188 | 0x83, 0xc6, 0x19, /* add si,+19h */ |
189 | 0xbb, 0x07, 0x00, /* mov bx,0007h */ |
190 | 0xfc, /* cld */ |
191 | 0xac, /* lodsb */ |
192 | 0x84, 0xc0, /* test al,al */ |
193 | 0x74, 0x06, /* jz $ + 8 */ |
194 | 0xb4, 0x0e, /* mov ah,0eh */ |
195 | 0xcd, 0x10, /* int 10h */ |
196 | 0xeb, 0xf5, /* jmp $ - 9 */ |
197 | 0x30, 0xe4, /* xor ah,ah */ |
198 | 0xcd, 0x16, /* int 16h */ |
199 | 0xcd, 0x19, /* int 19h */ |
200 | 0x0d, 0x0a, |
201 | 'N', 'o', 'n', '-', 's', 'y', 's', 't', |
202 | 'e', 'm', ' ', 'd', 'i', 's', 'k', |
203 | 0x0d, 0x0a, |
204 | 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', |
205 | 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', |
206 | ' ', 'r', 'e', 'b', 'o', 'o', 't', |
207 | 0x0d, 0x0a, |
208 | 0 |
209 | }; |
210 | |
211 | static void check_mounted(const char *, mode_t); |
212 | static void getstdfmt(const char *, struct bpb *); |
213 | static void getdiskinfo(int, const char *, const char *, int, |
214 | struct bpb *); |
215 | static void print_bpb(struct bpb *); |
216 | static u_int ckgeom(const char *, u_int, const char *); |
217 | static u_int argtou(const char *, u_int, u_int, const char *); |
218 | static int oklabel(const char *); |
219 | static void mklabel(u_int8_t *, const char *); |
220 | static void setstr(u_int8_t *, const char *, size_t); |
221 | static __dead__attribute__((__noreturn__)) void usage(void); |
222 | |
223 | /* |
224 | * Construct a FAT12, FAT16, or FAT32 file system. |
225 | */ |
226 | int |
227 | main(int argc, char *argv[]) |
228 | { |
229 | static char opts[] = "NB:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:qr:s:t:u:"; |
230 | static const char *opt_B, *opt_L, *opt_O, *opt_f; |
231 | static u_int opt_F, opt_I, opt_S, opt_a, opt_b, opt_c, opt_e; |
232 | static u_int opt_h, opt_i, opt_k, opt_m, opt_n, opt_o, opt_r; |
233 | static u_int opt_s, opt_u; |
234 | static int opt_N; |
235 | static int Iflag, mflag, oflag; |
236 | char buf[PATH_MAX1024]; |
237 | struct stat sb; |
238 | struct timeval tv; |
239 | struct bpb bpb; |
240 | struct tm *tm; |
241 | struct bs *bs; |
242 | struct bsbpb *bsbpb; |
243 | struct bsxbpb *bsxbpb; |
244 | struct bsx *bsx; |
245 | struct de *de; |
246 | u_int8_t *img; |
247 | const char *dtype, *bname; |
248 | char *sname, *fname; |
249 | ssize_t n; |
250 | time_t now; |
251 | u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; |
252 | int ch, fd, fd1; |
253 | |
254 | if (pledge("stdio rpath wpath disklabel", NULL((void *)0)) == -1) |
255 | err(1, "pledge"); |
256 | |
257 | while ((ch = getopt(argc, argv, opts)) != -1) |
258 | switch (ch) { |
259 | case 'N': |
260 | opt_N = 1; |
261 | break; |
262 | case 'B': |
263 | opt_B = optarg; |
264 | break; |
265 | case 'F': |
266 | opt_F = strtonum(optarg, 1, INT_MAX2147483647, NULL((void *)0)); |
267 | if (!(opt_F == 12 || opt_F == 16 || opt_F == 32)) |
268 | errx(1, "%s: bad FAT type", optarg); |
269 | break; |
270 | case 'I': |
271 | opt_I = argto4(optarg, 0, "volume ID")argtou(optarg, 0, 0xffffffff, "volume ID"); |
272 | Iflag = 1; |
273 | break; |
274 | case 'L': |
275 | if (!oklabel(optarg)) |
276 | errx(1, "%s: bad volume label", optarg); |
277 | opt_L = optarg; |
278 | break; |
279 | case 'O': |
280 | if (strlen(optarg) > 8) |
281 | errx(1, "%s: bad OEM string", optarg); |
282 | opt_O = optarg; |
283 | break; |
284 | case 'S': |
285 | opt_S = argto2(optarg, 1, "bytes/sector")argtou(optarg, 1, 0xffff, "bytes/sector"); |
286 | break; |
287 | case 'a': |
288 | opt_a = argto4(optarg, 1, "sectors/FAT")argtou(optarg, 1, 0xffffffff, "sectors/FAT"); |
289 | break; |
290 | case 'b': |
291 | opt_b = argtox(optarg, 1, "block size")argtou(optarg, 1, (2147483647 *2U +1U), "block size"); |
292 | opt_c = 0; |
293 | break; |
294 | case 'c': |
295 | opt_c = argto1(optarg, 1, "sectors/cluster")argtou(optarg, 1, 0xff, "sectors/cluster"); |
296 | opt_b = 0; |
297 | break; |
298 | case 'e': |
299 | opt_e = argto2(optarg, 1, "directory entries")argtou(optarg, 1, 0xffff, "directory entries"); |
300 | break; |
301 | case 'f': |
302 | opt_f = optarg; |
303 | break; |
304 | case 'h': |
305 | opt_h = argto2(optarg, 1, "drive heads")argtou(optarg, 1, 0xffff, "drive heads"); |
306 | break; |
307 | case 'i': |
308 | opt_i = argto2(optarg, 1, "info sector")argtou(optarg, 1, 0xffff, "info sector"); |
309 | break; |
310 | case 'k': |
311 | opt_k = argto2(optarg, 1, "backup sector")argtou(optarg, 1, 0xffff, "backup sector"); |
312 | break; |
313 | case 'm': |
314 | opt_m = argto1(optarg, 0, "media descriptor")argtou(optarg, 0, 0xff, "media descriptor"); |
315 | mflag = 1; |
316 | break; |
317 | case 'n': |
318 | opt_n = argto1(optarg, 1, "number of FATs")argtou(optarg, 1, 0xff, "number of FATs"); |
319 | break; |
320 | case 'o': |
321 | opt_o = argto4(optarg, 0, "hidden sectors")argtou(optarg, 0, 0xffffffff, "hidden sectors"); |
322 | oflag = 1; |
323 | break; |
324 | case 'q': /* Compat with newfs -q */ |
325 | break; |
326 | case 'r': |
327 | opt_r = argto2(optarg, 1, "reserved sectors")argtou(optarg, 1, 0xffff, "reserved sectors"); |
328 | break; |
329 | case 's': |
330 | opt_s = argto4(optarg, 1, "file system size")argtou(optarg, 1, 0xffffffff, "file system size"); |
331 | break; |
332 | case 't': /* Compat with newfs -t */ |
333 | break; |
334 | case 'u': |
335 | opt_u = argto2(optarg, 1, "sectors/track")argtou(optarg, 1, 0xffff, "sectors/track"); |
336 | break; |
337 | default: |
338 | usage(); |
339 | } |
340 | argc -= optind; |
341 | argv += optind; |
342 | if (argc < 1 || argc > 2) |
343 | usage(); |
344 | sname = *argv++; |
345 | dtype = *argv; |
346 | if ((fd = opendev(sname, opt_N ? O_RDONLY0x0000 : O_RDWR0x0002, 0, &fname)) == -1 || |
347 | fstat(fd, &sb)) |
348 | err(1, "%s", fname); |
349 | if (!opt_N) |
350 | check_mounted(fname, sb.st_mode); |
351 | if (S_ISBLK(sb.st_mode)((sb.st_mode & 0170000) == 0060000)) |
352 | errx(1, "%s: block device", fname); |
353 | if (!S_ISCHR(sb.st_mode)((sb.st_mode & 0170000) == 0020000)) |
354 | warnx("warning: %s is not a character device", fname); |
355 | memset(&bpb, 0, sizeof(bpb)); |
356 | if (opt_f) { |
357 | getstdfmt(opt_f, &bpb); |
358 | bpb.bsec = bpb.sec; |
359 | bpb.sec = 0; |
360 | bpb.bspf = bpb.spf; |
361 | bpb.spf = 0; |
362 | } |
363 | if (opt_h) |
364 | bpb.hds = opt_h; |
365 | if (opt_u) |
366 | bpb.spt = opt_u; |
367 | if (opt_S) |
368 | bpb.bps = opt_S; |
369 | if (opt_s) |
370 | bpb.bsec = opt_s; |
371 | if (oflag) |
372 | bpb.hid = opt_o; |
373 | if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) |
374 | getdiskinfo(fd, fname, dtype, oflag, &bpb); |
375 | if (!powerof2(bpb.bps)((((bpb.bps)-1)&(bpb.bps))==0)) |
376 | errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps); |
377 | if (bpb.bps < MINBPS512) |
378 | errx(1, "bytes/sector (%u) is too small; minimum is %u", |
379 | bpb.bps, MINBPS512); |
380 | if (!(fat = opt_F)) { |
381 | if (opt_f) |
382 | fat = 12; |
383 | else if (!opt_e && (opt_i || opt_k)) |
384 | fat = 32; |
385 | } |
386 | if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) |
387 | errx(1, "-%c is not a legal FAT%s option", |
388 | fat == 32 ? 'e' : opt_i ? 'i' : 'k', |
389 | fat == 32 ? "32" : "12/16"); |
390 | if (opt_f && fat == 32) |
391 | bpb.rde = 0; |
392 | if (opt_b) { |
393 | if (!powerof2(opt_b)((((opt_b)-1)&(opt_b))==0)) |
394 | errx(1, "block size (%u) is not a power of 2", opt_b); |
395 | if (opt_b < bpb.bps) |
396 | errx(1, "block size (%u) is too small; minimum is %u", |
397 | opt_b, bpb.bps); |
398 | if (opt_b > bpb.bps * MAXSPC128) |
399 | errx(1, "block size (%u) is too large; maximum is %u", |
400 | opt_b, bpb.bps * MAXSPC128); |
401 | bpb.spc = opt_b / bpb.bps; |
402 | } |
403 | if (opt_c) { |
404 | if (!powerof2(opt_c)((((opt_c)-1)&(opt_c))==0)) |
405 | errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); |
406 | bpb.spc = opt_c; |
407 | } |
408 | if (opt_r) |
409 | bpb.res = opt_r; |
410 | if (opt_n) { |
411 | if (opt_n > MAXNFT16) |
412 | errx(1, "number of FATs (%u) is too large; maximum is %u", |
413 | opt_n, MAXNFT16); |
414 | bpb.nft = opt_n; |
415 | } |
416 | if (opt_e) |
417 | bpb.rde = opt_e; |
418 | if (mflag) { |
419 | if (opt_m < 0xf0) |
420 | errx(1, "illegal media descriptor (%#x)", opt_m); |
421 | bpb.mid = opt_m; |
422 | } |
423 | if (opt_a) |
424 | bpb.bspf = opt_a; |
425 | if (opt_i) |
426 | bpb.infs = opt_i; |
427 | if (opt_k) |
428 | bpb.bkbs = opt_k; |
429 | bss = 1; |
430 | bname = NULL((void *)0); |
431 | fd1 = -1; |
432 | if (opt_B) { |
433 | bname = opt_B; |
434 | if (!strchr(bname, '/')) { |
435 | snprintf(buf, sizeof(buf), "/boot/%s", bname); |
436 | if (!(bname = strdup(buf))) |
437 | err(1, NULL((void *)0)); |
438 | } |
439 | if ((fd1 = open(bname, O_RDONLY0x0000)) == -1 || fstat(fd1, &sb)) |
440 | err(1, "%s", bname); |
441 | if (!S_ISREG(sb.st_mode)((sb.st_mode & 0170000) == 0100000) || sb.st_size % bpb.bps || |
442 | sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU160xffff) |
443 | errx(1, "%s: inappropriate file type or format", bname); |
444 | bss = sb.st_size / bpb.bps; |
445 | } |
446 | if (!bpb.nft) |
447 | bpb.nft = 2; |
448 | if (!fat) { |
449 | if (bpb.bsec < (bpb.res ? bpb.res : bss) + |
450 | howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) *((((2 + (bpb.spc ? 0xff5 : 0xff4 + 1)) * ((bpb.spc ? 16 : 12) / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)) |
451 | ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB)((((2 + (bpb.spc ? 0xff5 : 0xff4 + 1)) * ((bpb.spc ? 16 : 12) / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)) * |
452 | bpb.nft + |
453 | howmany(bpb.rde ? bpb.rde : DEFRDE,(((bpb.rde ? bpb.rde : 512) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof(struct de))) |
454 | bpb.bps / sizeof(struct de))(((bpb.rde ? bpb.rde : 512) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof(struct de))) + |
455 | (bpb.spc ? MINCLS160xff5 : MAXCLS120xff4 + 1) * |
456 | (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps)(((4096) + ((bpb.bps) - 1)) / (bpb.bps)))) |
457 | fat = 12; |
458 | else if (bpb.rde || bpb.bsec < |
459 | (bpb.res ? bpb.res : bss) + |
460 | howmany((RESFTE + MAXCLS16) * 2, bpb.bps)((((2 + 0xfff4) * 2) + ((bpb.bps) - 1)) / (bpb.bps)) * bpb.nft + |
461 | howmany(DEFRDE, bpb.bps / sizeof(struct de))(((512) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof (struct de))) + |
462 | (MAXCLS160xfff4 + 1) * |
463 | (bpb.spc ? bpb.spc : howmany(8192, bpb.bps)(((8192) + ((bpb.bps) - 1)) / (bpb.bps)))) |
464 | fat = 16; |
465 | else |
466 | fat = 32; |
467 | } |
468 | x = bss; |
469 | if (fat == 32) { |
470 | if (!bpb.infs) { |
471 | if (x == MAXU160xffff || x == bpb.bkbs) |
472 | errx(1, "no room for info sector"); |
473 | bpb.infs = x; |
474 | } |
475 | if (bpb.infs != MAXU160xffff && x <= bpb.infs) |
476 | x = bpb.infs + 1; |
477 | if (!bpb.bkbs) { |
478 | if (x == MAXU160xffff) |
479 | errx(1, "no room for backup sector"); |
480 | bpb.bkbs = x; |
481 | } else if (bpb.bkbs != MAXU160xffff && bpb.bkbs == bpb.infs) |
482 | errx(1, "backup sector would overwrite info sector"); |
483 | if (bpb.bkbs != MAXU160xffff && x <= bpb.bkbs) |
484 | x = bpb.bkbs + 1; |
485 | } |
486 | if (!bpb.res) |
487 | bpb.res = fat == 32 ? MAXIMUM(x, MAXIMUM(16384 / bpb.bps, 4))(((x) > ((((16384 / bpb.bps) > (4)) ? (16384 / bpb.bps) : (4)))) ? (x) : ((((16384 / bpb.bps) > (4)) ? (16384 / bpb .bps) : (4)))) : x; |
488 | else if (bpb.res < x) |
489 | errx(1, "too few reserved sectors"); |
490 | if (fat != 32 && !bpb.rde) |
491 | bpb.rde = DEFRDE512; |
492 | rds = howmany(bpb.rde, bpb.bps / sizeof(struct de))(((bpb.rde) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof(struct de))); |
493 | if (!bpb.spc) |
494 | for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps)(((fat == 16 ? 2048 : 4096) + ((bpb.bps) - 1)) / (bpb.bps)); |
495 | bpb.spc < MAXSPC128 && |
496 | bpb.res + |
497 | howmany((RESFTE + maxcls(fat)) * (fat / BPN),((((2 + ((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4 )) * (fat / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)) |
498 | bpb.bps * NPB)((((2 + ((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4 )) * (fat / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)) * bpb.nft + |
499 | rds + |
500 | (u_int64_t)(maxcls(fat)((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4) + 1) * bpb.spc <= bpb.bsec; |
501 | bpb.spc <<= 1); |
502 | if (fat != 32 && bpb.bspf > MAXU160xffff) |
503 | errx(1, "too many sectors/FAT for FAT12/16"); |
504 | x1 = bpb.res + rds; |
505 | x = bpb.bspf ? bpb.bspf : 1; |
506 | if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) |
507 | errx(1, "meta data exceeds file system size"); |
508 | x1 += x * bpb.nft; |
509 | x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB2 / |
510 | (bpb.spc * bpb.bps * NPB2 + fat / BPN4 * bpb.nft); |
511 | x2 = howmany((RESFTE + MINIMUM(x, maxcls(fat))) * (fat / BPN),((((2 + (((x) < (((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4))) ? (x) : (((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4)))) * (fat / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)) |
512 | bpb.bps * NPB)((((2 + (((x) < (((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4))) ? (x) : (((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4)))) * (fat / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)); |
513 | if (!bpb.bspf) { |
514 | bpb.bspf = x2; |
515 | x1 += (bpb.bspf - 1) * bpb.nft; |
516 | } |
517 | cls = (bpb.bsec - x1) / bpb.spc; |
518 | x = (u_int64_t)bpb.bspf * bpb.bps * NPB2 / (fat / BPN4) - RESFTE2; |
519 | if (cls > x) |
520 | cls = x; |
521 | if (bpb.bspf < x2) |
522 | warnx("warning: sectors/FAT limits file system to %u clusters", |
523 | cls); |
524 | if (cls < mincls(fat)((fat) == 12 ? 1 : (fat) == 16 ? 0xff5 : 0xfff5)) |
525 | errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, |
526 | mincls(fat)((fat) == 12 ? 1 : (fat) == 16 ? 0xff5 : 0xfff5)); |
527 | if (cls > maxcls(fat)((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4)) { |
528 | cls = maxcls(fat)((fat) == 12 ? 0xff4 : (fat) == 16 ? 0xfff4 : 0xffffff4); |
529 | bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; |
530 | warnx("warning: FAT type limits file system to %u sectors", |
531 | bpb.bsec); |
532 | } |
533 | printf("%s: %u sector%s in %u FAT%u cluster%s " |
534 | "(%u bytes/cluster)\n", fname, cls * bpb.spc, |
535 | cls * bpb.spc == 1 ? "" : "s", cls, fat, |
536 | cls == 1 ? "" : "s", bpb.bps * bpb.spc); |
537 | if (!bpb.mid) |
538 | bpb.mid = !bpb.hid ? 0xf0 : 0xf8; |
539 | if (fat == 32) |
540 | bpb.rdcl = RESFTE2; |
541 | if (bpb.hid + bpb.bsec <= MAXU160xffff) { |
542 | bpb.sec = bpb.bsec; |
543 | bpb.bsec = 0; |
544 | } |
545 | if (fat != 32) { |
546 | bpb.spf = bpb.bspf; |
547 | bpb.bspf = 0; |
548 | } |
549 | print_bpb(&bpb); |
550 | if (!opt_N) { |
551 | gettimeofday(&tv, NULL((void *)0)); |
552 | now = tv.tv_sec; |
553 | tm = localtime(&now); |
554 | if (!(img = malloc(bpb.bps))) |
555 | err(1, NULL((void *)0)); |
556 | dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; |
557 | for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { |
558 | x = lsn; |
559 | if (opt_B && |
560 | fat == 32 && bpb.bkbs != MAXU160xffff && |
561 | bss <= bpb.bkbs && x >= bpb.bkbs) { |
562 | x -= bpb.bkbs; |
563 | if (!x && lseek(fd1, 0, SEEK_SET0)) |
564 | err(1, "%s", bname); |
565 | } |
566 | if (opt_B && x < bss) { |
567 | if ((n = read(fd1, img, bpb.bps)) == -1) |
568 | err(1, "%s", bname); |
569 | if (n != bpb.bps) |
570 | errx(1, "%s: can't read sector %u", bname, x); |
571 | } else |
572 | memset(img, 0, bpb.bps); |
573 | if (!lsn || |
574 | (fat == 32 && bpb.bkbs != MAXU160xffff && lsn == bpb.bkbs)) { |
575 | x1 = sizeof(struct bs); |
576 | bsbpb = (struct bsbpb *)(img + x1); |
577 | mk2(bsbpb->bps, bpb.bps)(bsbpb->bps)[0] = (u_int8_t)(bpb.bps), (bsbpb->bps)[1] = (u_int8_t)((bpb.bps) >> 010); |
578 | mk1(bsbpb->spc, bpb.spc)(bsbpb->spc) = (u_int8_t)(bpb.spc); |
579 | mk2(bsbpb->res, bpb.res)(bsbpb->res)[0] = (u_int8_t)(bpb.res), (bsbpb->res)[1] = (u_int8_t)((bpb.res) >> 010); |
580 | mk1(bsbpb->nft, bpb.nft)(bsbpb->nft) = (u_int8_t)(bpb.nft); |
581 | mk2(bsbpb->rde, bpb.rde)(bsbpb->rde)[0] = (u_int8_t)(bpb.rde), (bsbpb->rde)[1] = (u_int8_t)((bpb.rde) >> 010); |
582 | mk2(bsbpb->sec, bpb.sec)(bsbpb->sec)[0] = (u_int8_t)(bpb.sec), (bsbpb->sec)[1] = (u_int8_t)((bpb.sec) >> 010); |
583 | mk1(bsbpb->mid, bpb.mid)(bsbpb->mid) = (u_int8_t)(bpb.mid); |
584 | mk2(bsbpb->spf, bpb.spf)(bsbpb->spf)[0] = (u_int8_t)(bpb.spf), (bsbpb->spf)[1] = (u_int8_t)((bpb.spf) >> 010); |
585 | mk2(bsbpb->spt, bpb.spt)(bsbpb->spt)[0] = (u_int8_t)(bpb.spt), (bsbpb->spt)[1] = (u_int8_t)((bpb.spt) >> 010); |
586 | mk2(bsbpb->hds, bpb.hds)(bsbpb->hds)[0] = (u_int8_t)(bpb.hds), (bsbpb->hds)[1] = (u_int8_t)((bpb.hds) >> 010); |
587 | mk4(bsbpb->hid, bpb.hid)(bsbpb->hid)[0] = (u_int8_t)(bpb.hid), (bsbpb->hid)[1] = (u_int8_t)((bpb.hid) >> 010), (bsbpb->hid)[2] = (u_int8_t )((bpb.hid) >> 020), (bsbpb->hid)[3] = (u_int8_t)((bpb .hid) >> 030); |
588 | mk4(bsbpb->bsec, bpb.bsec)(bsbpb->bsec)[0] = (u_int8_t)(bpb.bsec), (bsbpb->bsec)[ 1] = (u_int8_t)((bpb.bsec) >> 010), (bsbpb->bsec)[2] = (u_int8_t)((bpb.bsec) >> 020), (bsbpb->bsec)[3] = (u_int8_t)((bpb.bsec) >> 030); |
589 | x1 += sizeof(struct bsbpb); |
590 | if (fat == 32) { |
591 | bsxbpb = (struct bsxbpb *)(img + x1); |
592 | mk4(bsxbpb->bspf, bpb.bspf)(bsxbpb->bspf)[0] = (u_int8_t)(bpb.bspf), (bsxbpb->bspf )[1] = (u_int8_t)((bpb.bspf) >> 010), (bsxbpb->bspf) [2] = (u_int8_t)((bpb.bspf) >> 020), (bsxbpb->bspf)[ 3] = (u_int8_t)((bpb.bspf) >> 030); |
593 | mk2(bsxbpb->xflg, 0)(bsxbpb->xflg)[0] = (u_int8_t)(0), (bsxbpb->xflg)[1] = ( u_int8_t)((0) >> 010); |
594 | mk2(bsxbpb->vers, 0)(bsxbpb->vers)[0] = (u_int8_t)(0), (bsxbpb->vers)[1] = ( u_int8_t)((0) >> 010); |
595 | mk4(bsxbpb->rdcl, bpb.rdcl)(bsxbpb->rdcl)[0] = (u_int8_t)(bpb.rdcl), (bsxbpb->rdcl )[1] = (u_int8_t)((bpb.rdcl) >> 010), (bsxbpb->rdcl) [2] = (u_int8_t)((bpb.rdcl) >> 020), (bsxbpb->rdcl)[ 3] = (u_int8_t)((bpb.rdcl) >> 030); |
596 | mk2(bsxbpb->infs, bpb.infs)(bsxbpb->infs)[0] = (u_int8_t)(bpb.infs), (bsxbpb->infs )[1] = (u_int8_t)((bpb.infs) >> 010); |
597 | mk2(bsxbpb->bkbs, bpb.bkbs)(bsxbpb->bkbs)[0] = (u_int8_t)(bpb.bkbs), (bsxbpb->bkbs )[1] = (u_int8_t)((bpb.bkbs) >> 010); |
598 | x1 += sizeof(struct bsxbpb); |
599 | } |
600 | bsx = (struct bsx *)(img + x1); |
601 | mk1(bsx->sig, 0x29)(bsx->sig) = (u_int8_t)(0x29); |
602 | if (Iflag) |
603 | x = opt_I; |
604 | else |
605 | x = (((u_int)(1 + tm->tm_mon) << 8 | |
606 | (u_int)tm->tm_mday) + |
607 | ((u_int)tm->tm_sec << 8 | |
608 | (u_int)(tv.tv_usec / 10))) << 16 | |
609 | ((u_int)(1900 + tm->tm_year) + |
610 | ((u_int)tm->tm_hour << 8 | |
611 | (u_int)tm->tm_min)); |
612 | mk4(bsx->volid, x)(bsx->volid)[0] = (u_int8_t)(x), (bsx->volid)[1] = (u_int8_t )((x) >> 010), (bsx->volid)[2] = (u_int8_t)((x) >> 020), (bsx->volid)[3] = (u_int8_t)((x) >> 030); |
613 | mklabel(bsx->label, opt_L ? opt_L : "NO NAME"); |
614 | snprintf(buf, sizeof buf, "FAT%u", fat); |
615 | setstr(bsx->type, buf, sizeof(bsx->type)); |
616 | if (!opt_B) { |
617 | x1 += sizeof(struct bsx); |
618 | bs = (struct bs *)img; |
619 | mk1(bs->jmp[0], 0xeb)(bs->jmp[0]) = (u_int8_t)(0xeb); |
620 | mk1(bs->jmp[1], x1 - 2)(bs->jmp[1]) = (u_int8_t)(x1 - 2); |
621 | mk1(bs->jmp[2], 0x90)(bs->jmp[2]) = (u_int8_t)(0x90); |
622 | setstr(bs->oem, opt_O ? opt_O : "BSD 4.4", |
623 | sizeof(bs->oem)); |
624 | memcpy(img + x1, bootcode, sizeof(bootcode)); |
625 | mk2(img + MINBPS - 2, DOSMAGIC)(img + 512 - 2)[0] = (u_int8_t)(0xaa55), (img + 512 - 2)[1] = (u_int8_t)((0xaa55) >> 010); |
626 | } |
627 | } else if (fat == 32 && bpb.infs != MAXU160xffff && |
628 | (lsn == bpb.infs || |
629 | (bpb.bkbs != MAXU160xffff && |
630 | lsn == bpb.bkbs + bpb.infs))) { |
631 | mk4(img, 0x41615252)(img)[0] = (u_int8_t)(0x41615252), (img)[1] = (u_int8_t)((0x41615252 ) >> 010), (img)[2] = (u_int8_t)((0x41615252) >> 020 ), (img)[3] = (u_int8_t)((0x41615252) >> 030); |
632 | mk4(img + MINBPS - 28, 0x61417272)(img + 512 - 28)[0] = (u_int8_t)(0x61417272), (img + 512 - 28 )[1] = (u_int8_t)((0x61417272) >> 010), (img + 512 - 28 )[2] = (u_int8_t)((0x61417272) >> 020), (img + 512 - 28 )[3] = (u_int8_t)((0x61417272) >> 030); |
633 | mk4(img + MINBPS - 24, 0xffffffff)(img + 512 - 24)[0] = (u_int8_t)(0xffffffff), (img + 512 - 24 )[1] = (u_int8_t)((0xffffffff) >> 010), (img + 512 - 24 )[2] = (u_int8_t)((0xffffffff) >> 020), (img + 512 - 24 )[3] = (u_int8_t)((0xffffffff) >> 030); |
634 | mk4(img + MINBPS - 20, 0xffffffff)(img + 512 - 20)[0] = (u_int8_t)(0xffffffff), (img + 512 - 20 )[1] = (u_int8_t)((0xffffffff) >> 010), (img + 512 - 20 )[2] = (u_int8_t)((0xffffffff) >> 020), (img + 512 - 20 )[3] = (u_int8_t)((0xffffffff) >> 030); |
635 | mk2(img + MINBPS - 2, DOSMAGIC)(img + 512 - 2)[0] = (u_int8_t)(0xaa55), (img + 512 - 2)[1] = (u_int8_t)((0xaa55) >> 010); |
636 | } else if (lsn >= bpb.res && lsn < dir && |
637 | !((lsn - bpb.res) % |
638 | (bpb.spf ? bpb.spf : bpb.bspf))) { |
639 | mk1(img[0], bpb.mid)(img[0]) = (u_int8_t)(bpb.mid); |
640 | for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) |
641 | mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff)(img[x]) = (u_int8_t)(fat == 32 && x % 4 == 3 ? 0x0f : 0xff); |
642 | } else if (lsn == dir && opt_L) { |
643 | de = (struct de *)img; |
644 | mklabel(de->namext, opt_L); |
645 | mk1(de->attr, 050)(de->attr) = (u_int8_t)(050); |
646 | x = (u_int)tm->tm_hour << 11 | |
647 | (u_int)tm->tm_min << 5 | |
648 | (u_int)tm->tm_sec >> 1; |
649 | mk2(de->time, x)(de->time)[0] = (u_int8_t)(x), (de->time)[1] = (u_int8_t )((x) >> 010); |
650 | x = (u_int)(tm->tm_year - 80) << 9 | |
651 | (u_int)(tm->tm_mon + 1) << 5 | |
652 | (u_int)tm->tm_mday; |
653 | mk2(de->date, x)(de->date)[0] = (u_int8_t)(x), (de->date)[1] = (u_int8_t )((x) >> 010); |
654 | } |
655 | if ((n = write(fd, img, bpb.bps)) == -1) |
656 | err(1, "%s", fname); |
657 | if (n != bpb.bps) |
658 | errx(1, "%s: can't write sector %u", fname, lsn); |
659 | } |
660 | } |
661 | return 0; |
662 | } |
663 | |
664 | /* |
665 | * Exit with error if file system is mounted. |
666 | */ |
667 | static void |
668 | check_mounted(const char *fname, mode_t mode) |
669 | { |
670 | struct statfs *mp; |
671 | const char *s1, *s2; |
672 | size_t len; |
673 | int n, r; |
674 | |
675 | if (!(n = getmntinfo(&mp, MNT_NOWAIT2))) |
676 | err(1, "getmntinfo"); |
677 | len = sizeof(_PATH_DEV"/dev/") - 1; |
678 | s1 = fname; |
679 | if (!strncmp(s1, _PATH_DEV"/dev/", len)) |
680 | s1 += len; |
681 | r = S_ISCHR(mode)((mode & 0170000) == 0020000) && s1 != fname && *s1 == 'r'; |
682 | for (; n--; mp++) { |
683 | s2 = mp->f_mntfromname; |
684 | if (!strncmp(s2, _PATH_DEV"/dev/", len)) |
685 | s2 += len; |
686 | if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || |
687 | !strcmp(s1, s2)) |
688 | errx(1, "%s is mounted on %s", fname, mp->f_mntonname); |
689 | } |
690 | } |
691 | |
692 | /* |
693 | * Get a standard format. |
694 | */ |
695 | static void |
696 | getstdfmt(const char *fmt, struct bpb *bpb) |
697 | { |
698 | u_int x, i; |
699 | |
700 | x = sizeof(stdfmt) / sizeof(stdfmt[0]); |
701 | for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); |
702 | if (i == x) |
703 | errx(1, "%s: unknown standard format", fmt); |
704 | *bpb = stdfmt[i].bpb; |
705 | } |
706 | |
707 | /* |
708 | * Get disk slice, partition, and geometry information. |
709 | */ |
710 | static void |
711 | getdiskinfo(int fd, const char *fname, const char *dtype, int oflag, |
712 | struct bpb *bpb) |
713 | { |
714 | struct disklabel dl, *lp; |
715 | const char *s1, *s2; |
716 | int part, i; |
717 | |
718 | part = -1; |
719 | s1 = fname; |
720 | if ((s2 = strrchr(s1, '/'))) |
721 | s1 = s2 + 1; |
722 | for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++); |
723 | if (!*s2 || s2 == s1) |
724 | s2 = NULL((void *)0); |
725 | else |
726 | while (isdigit((unsigned char)*++s2)); |
727 | s1 = s2; |
Value stored to 's1' is never read | |
728 | if (s2 && *s2 >= 'a' && *s2 <= 'a' + MAXPARTITIONS16 - 1) { |
729 | part = *s2++ - 'a'; |
730 | } |
731 | if (!s2 || (*s2 && *s2 != '.')) |
732 | errx(1, "%s: can't figure out partition info", fname); |
733 | if ((((!oflag && part != -1) || !bpb->bsec)) || |
734 | !bpb->bps || !bpb->spt || !bpb->hds) { |
735 | lp = &dl; |
736 | i = ioctl(fd, DIOCGDINFO((unsigned long)0x40000000 | ((sizeof(struct disklabel) & 0x1fff) << 16) | ((('d')) << 8) | ((101))), lp); |
737 | if (i == -1) { |
738 | if (!dtype) { |
739 | warn("ioctl (GDINFO)"); |
740 | errx(1, "%s: can't read disk label; " |
741 | "disk type must be specified", fname); |
742 | } else if (!(lp = getdiskbyname(dtype))) |
743 | errx(1, "%s: unknown disk type", dtype); |
744 | } |
745 | if (part == -1) |
746 | part = RAW_PART2; |
747 | if (part >= lp->d_npartitions || |
748 | !DL_GETPSIZE(&lp->d_partitions[part])(((u_int64_t)(&lp->d_partitions[part])->p_sizeh << 32) + (&lp->d_partitions[part])->p_size)) |
749 | errx(1, "%s: partition is unavailable", fname); |
750 | if (!oflag && part != -1) |
751 | bpb->hid += DL_GETPOFFSET(&lp->d_partitions[part])(((u_int64_t)(&lp->d_partitions[part])->p_offseth << 32) + (&lp->d_partitions[part])->p_offset); |
752 | if (!bpb->bsec) |
753 | bpb->bsec = DL_GETPSIZE(&lp->d_partitions[part])(((u_int64_t)(&lp->d_partitions[part])->p_sizeh << 32) + (&lp->d_partitions[part])->p_size); |
754 | if (!bpb->bps) |
755 | bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector"); |
756 | if (!bpb->spt) |
757 | bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track"); |
758 | if (!bpb->hds) |
759 | bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads"); |
760 | if (bpb->spt > 63) { |
761 | bpb->hds = bpb->hds * bpb->spt / 63; |
762 | bpb->spt = 63; |
763 | } |
764 | } |
765 | } |
766 | |
767 | /* |
768 | * Print out BPB values. |
769 | */ |
770 | static void |
771 | print_bpb(struct bpb *bpb) |
772 | { |
773 | printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, |
774 | bpb->nft); |
775 | if (bpb->rde) |
776 | printf(" rde=%u", bpb->rde); |
777 | if (bpb->sec) |
778 | printf(" sec=%u", bpb->sec); |
779 | printf(" mid=%#x", bpb->mid); |
780 | if (bpb->spf) |
781 | printf(" spf=%u", bpb->spf); |
782 | printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); |
783 | if (bpb->bsec) |
784 | printf(" bsec=%u", bpb->bsec); |
785 | if (!bpb->spf) { |
786 | printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); |
787 | printf(" infs="); |
788 | printf(bpb->infs == MAXU160xffff ? "%#x" : "%u", bpb->infs); |
789 | printf(" bkbs="); |
790 | printf(bpb->bkbs == MAXU160xffff ? "%#x" : "%u", bpb->bkbs); |
791 | } |
792 | printf("\n"); |
793 | } |
794 | |
795 | /* |
796 | * Check a disk geometry value. |
797 | */ |
798 | static u_int |
799 | ckgeom(const char *fname, u_int val, const char *msg) |
800 | { |
801 | if (!val) |
802 | errx(1, "%s: no default %s", fname, msg); |
803 | if (val > MAXU160xffff) |
804 | errx(1, "%s: illegal %s", fname, msg); |
805 | return val; |
806 | } |
807 | |
808 | /* |
809 | * Convert and check a numeric option argument. |
810 | */ |
811 | static u_int |
812 | argtou(const char *arg, u_int lo, u_int hi, const char *msg) |
813 | { |
814 | char *s; |
815 | u_long x; |
816 | |
817 | errno(*__errno()) = 0; |
818 | x = strtoul(arg, &s, 0); |
819 | if (errno(*__errno()) || !*arg || *s || x < lo || x > hi) |
820 | errx(1, "%s: bad %s", arg, msg); |
821 | return x; |
822 | } |
823 | |
824 | /* |
825 | * Check a volume label. |
826 | */ |
827 | static int |
828 | oklabel(const char *src) |
829 | { |
830 | int c = 0, i; |
831 | |
832 | for (i = 0; i <= 11; i++) { |
833 | c = (u_char)*src++; |
834 | if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) |
835 | break; |
836 | } |
837 | return i && !c; |
838 | } |
839 | |
840 | /* |
841 | * Make a volume label. |
842 | */ |
843 | static void |
844 | mklabel(u_int8_t *dest, const char *src) |
845 | { |
846 | int c, i; |
847 | |
848 | for (i = 0; i < 11; i++) { |
849 | c = *src ? toupper((unsigned char)*src++) : ' '; |
850 | *dest++ = !i && c == '\xe5' ? 5 : c; |
851 | } |
852 | } |
853 | |
854 | /* |
855 | * Copy string, padding with spaces. |
856 | */ |
857 | static void |
858 | setstr(u_int8_t *dest, const char *src, size_t len) |
859 | { |
860 | while (len--) |
861 | *dest++ = *src ? *src++ : ' '; |
862 | } |
863 | |
864 | /* |
865 | * Print usage message. |
866 | */ |
867 | static __dead__attribute__((__noreturn__)) void |
868 | usage(void) |
869 | { |
870 | extern const char *__progname; |
871 | |
872 | fprintf(stderr(&__sF[2]), "usage: %s " |
873 | "[-N] [-a FAT-size] [-B boot] [-b block-size]\n" |
874 | "\t[-c cluster-size] [-e dirents] [-F FAT-type] [-f format]\n" |
875 | "\t[-h heads] [-I volid] [-i info] [-k backup] [-L label]\n" |
876 | "\t[-m media] [-n FATs] [-O OEM] [-o hidden] [-r reserved]\n" |
877 | "\t[-S sector-size] [-s total] [-u track-size] special\n" |
878 | "\t[disktype]\n", |
879 | __progname); |
880 | exit(1); |
881 | } |