| File: | src/usr.sbin/makefs/msdos/mkfs_msdos.c |
| Warning: | line 760, column 5 Value stored to 's1' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | /* $OpenBSD: mkfs_msdos.c,v 1.7 2022/02/28 16:17:37 krw Exp $ */ |
| 2 | /* $NetBSD: mkfs_msdos.c,v 1.10 2016/04/03 11:00:13 mlelstv Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1998 Robert Nordier |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in |
| 15 | * the documentation and/or other materials provided with the |
| 16 | * distribution. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS |
| 19 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY |
| 22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| 24 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| 26 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 27 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 28 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <sys/param.h> /* powerof2 */ |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/stat.h> |
| 34 | #include <sys/time.h> |
| 35 | |
| 36 | #include <ctype.h> |
| 37 | #include <err.h> |
| 38 | #include <errno(*__errno()).h> |
| 39 | #include <fcntl.h> |
| 40 | #include <paths.h> |
| 41 | #include <stdio.h> |
| 42 | #include <stdint.h> |
| 43 | #include <stdlib.h> |
| 44 | #include <limits.h> |
| 45 | #include <string.h> |
| 46 | #include <time.h> |
| 47 | #include <unistd.h> |
| 48 | #include <signal.h> |
| 49 | |
| 50 | #include <util.h> |
| 51 | |
| 52 | #include "makefs.h" |
| 53 | #include "msdos/mkfs_msdos.h" |
| 54 | |
| 55 | #define MAXU160xffff 0xffff /* maximum unsigned 16-bit quantity */ |
| 56 | #define BPN4 4 /* bits per nibble */ |
| 57 | #define NPB2 2 /* nibbles per byte */ |
| 58 | |
| 59 | #define DOSMAGIC0xaa55 0xaa55 /* DOS magic number */ |
| 60 | #define MINBPS512 512 /* minimum bytes per sector */ |
| 61 | #define MAXSPC128 128 /* maximum sectors per cluster */ |
| 62 | #define MAXNFT16 16 /* maximum number of FATs */ |
| 63 | #define DEFBLK4096 4096 /* default block size */ |
| 64 | #define DEFBLK162048 2048 /* default block size FAT16 */ |
| 65 | #define DEFRDE512 512 /* default root directory entries */ |
| 66 | #define RESFTE2 2 /* reserved FAT entries */ |
| 67 | #define MINCLS121 1 /* minimum FAT12 clusters */ |
| 68 | #define MINCLS160xff5 0xff5 /* minimum FAT16 clusters */ |
| 69 | #define MINCLS320xfff5 0xfff5 /* minimum FAT32 clusters */ |
| 70 | #define MAXCLS120xff4 0xff4 /* maximum FAT12 clusters */ |
| 71 | #define MAXCLS160xfff4 0xfff4 /* maximum FAT16 clusters */ |
| 72 | #define MAXCLS320xffffff4 0xffffff4 /* maximum FAT32 clusters */ |
| 73 | |
| 74 | #define mincls(fat_type)((fat_type) == 12 ? 1 : (fat_type) == 16 ? 0xff5 : 0xfff5) ((fat_type) == 12 ? MINCLS121 : \ |
| 75 | (fat_type) == 16 ? MINCLS160xff5 : \ |
| 76 | MINCLS320xfff5) |
| 77 | |
| 78 | #define maxcls(fat_type)((fat_type) == 12 ? 0xff4 : (fat_type) == 16 ? 0xfff4 : 0xffffff4 ) ((fat_type) == 12 ? MAXCLS120xff4 : \ |
| 79 | (fat_type) == 16 ? MAXCLS160xfff4 : \ |
| 80 | MAXCLS320xffffff4) |
| 81 | |
| 82 | #define mk1(p, x)(p) = (u_int8_t)(x) \ |
| 83 | (p) = (u_int8_t)(x) |
| 84 | |
| 85 | #define mk2(p, x)(p)[0] = (u_int8_t)(x), (p)[1] = (u_int8_t)((x) >> 010) \ |
| 86 | (p)[0] = (u_int8_t)(x), \ |
| 87 | (p)[1] = (u_int8_t)((x) >> 010) |
| 88 | |
| 89 | #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) \ |
| 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 jmp[3]; /* bootstrap entry point */ |
| 97 | u_int8_t oem[8]; /* OEM name and version */ |
| 98 | }; |
| 99 | |
| 100 | struct bsbpb { |
| 101 | u_int8_t bps[2]; /* bytes per sector */ |
| 102 | u_int8_t spc; /* sectors per cluster */ |
| 103 | u_int8_t res[2]; /* reserved sectors */ |
| 104 | u_int8_t nft; /* number of FATs */ |
| 105 | u_int8_t rde[2]; /* root directory entries */ |
| 106 | u_int8_t sec[2]; /* total sectors */ |
| 107 | u_int8_t mid; /* media descriptor */ |
| 108 | u_int8_t spf[2]; /* sectors per FAT */ |
| 109 | u_int8_t spt[2]; /* sectors per track */ |
| 110 | u_int8_t hds[2]; /* drive heads */ |
| 111 | u_int8_t hid[4]; /* hidden sectors */ |
| 112 | u_int8_t bsec[4]; /* big total sectors */ |
| 113 | }; |
| 114 | |
| 115 | struct bsxbpb { |
| 116 | u_int8_t bspf[4]; /* big sectors per FAT */ |
| 117 | u_int8_t xflg[2]; /* FAT control flags */ |
| 118 | u_int8_t vers[2]; /* file system version */ |
| 119 | u_int8_t rdcl[4]; /* root directory start cluster */ |
| 120 | u_int8_t infs[2]; /* file system info sector */ |
| 121 | u_int8_t bkbs[2]; /* backup boot sector */ |
| 122 | u_int8_t rsvd[12]; /* reserved */ |
| 123 | }; |
| 124 | |
| 125 | struct bsx { |
| 126 | u_int8_t drv; /* drive number */ |
| 127 | u_int8_t rsvd; /* reserved */ |
| 128 | u_int8_t sig; /* extended boot signature */ |
| 129 | u_int8_t volid[4]; /* volume ID number */ |
| 130 | u_int8_t label[11]; /* volume label */ |
| 131 | u_int8_t type[8]; /* file system type */ |
| 132 | }; |
| 133 | |
| 134 | struct de { |
| 135 | u_int8_t namext[11]; /* name and extension */ |
| 136 | u_int8_t attr; /* attributes */ |
| 137 | u_int8_t rsvd[10]; /* reserved */ |
| 138 | u_int8_t time[2]; /* creation time */ |
| 139 | u_int8_t date[2]; /* creation date */ |
| 140 | u_int8_t clus[2]; /* starting cluster */ |
| 141 | u_int8_t size[4]; /* size */ |
| 142 | }; |
| 143 | |
| 144 | struct bpb { |
| 145 | u_int bps; /* bytes per sector */ |
| 146 | u_int spc; /* sectors per cluster */ |
| 147 | u_int res; /* reserved sectors */ |
| 148 | u_int nft; /* number of FATs */ |
| 149 | u_int rde; /* root directory entries */ |
| 150 | u_int sec; /* total sectors */ |
| 151 | u_int mid; /* media descriptor */ |
| 152 | u_int spf; /* sectors per FAT */ |
| 153 | u_int spt; /* sectors per track */ |
| 154 | u_int hds; /* drive heads */ |
| 155 | u_int hid; /* hidden sectors */ |
| 156 | u_int bsec; /* big total sectors */ |
| 157 | u_int bspf; /* big sectors per FAT */ |
| 158 | u_int rdcl; /* root directory start cluster */ |
| 159 | u_int infs; /* file system info sector */ |
| 160 | u_int bkbs; /* backup boot sector */ |
| 161 | }; |
| 162 | |
| 163 | #define INIT(a, b, c, d, e, f, g, h, i, j){ .bps = a, .spc = b, .res = c, .nft = d, .rde = e, .sec = f, .mid = g, .spf = h, .spt = i, .hds = j, } \ |
| 164 | { .bps = a, .spc = b, .res = c, .nft = d, .rde = e, \ |
| 165 | .sec = f, .mid = g, .spf = h, .spt = i, .hds = j, } |
| 166 | static struct { |
| 167 | const char *name; |
| 168 | struct bpb bpb; |
| 169 | } stdfmt[] = { |
| 170 | {"160", INIT(512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1){ .bps = 512, .spc = 1, .res = 1, .nft = 2, .rde = 64, .sec = 320, .mid = 0xfe, .spf = 1, .spt = 8, .hds = 1, }}, |
| 171 | {"180", INIT(512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1){ .bps = 512, .spc = 1, .res = 1, .nft = 2, .rde = 64, .sec = 360, .mid = 0xfc, .spf = 2, .spt = 9, .hds = 1, }}, |
| 172 | {"320", INIT(512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2){ .bps = 512, .spc = 2, .res = 1, .nft = 2, .rde = 112, .sec = 640, .mid = 0xff, .spf = 1, .spt = 8, .hds = 2, }}, |
| 173 | {"360", INIT(512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2){ .bps = 512, .spc = 2, .res = 1, .nft = 2, .rde = 112, .sec = 720, .mid = 0xfd, .spf = 2, .spt = 9, .hds = 2, }}, |
| 174 | {"640", INIT(512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2){ .bps = 512, .spc = 2, .res = 1, .nft = 2, .rde = 112, .sec = 1280, .mid = 0xfb, .spf = 2, .spt = 8, .hds = 2, }}, |
| 175 | {"720", INIT(512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2){ .bps = 512, .spc = 2, .res = 1, .nft = 2, .rde = 112, .sec = 1440, .mid = 0xf9, .spf = 3, .spt = 9, .hds = 2, }}, |
| 176 | {"1200", INIT(512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2){ .bps = 512, .spc = 1, .res = 1, .nft = 2, .rde = 224, .sec = 2400, .mid = 0xf9, .spf = 7, .spt = 15, .hds = 2, }}, |
| 177 | {"1232", INIT(1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2){ .bps = 1024, .spc = 1, .res = 1, .nft = 2, .rde = 192, .sec = 1232, .mid = 0xfe, .spf = 2, .spt = 8, .hds = 2, }}, |
| 178 | {"1440", INIT(512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2){ .bps = 512, .spc = 1, .res = 1, .nft = 2, .rde = 224, .sec = 2880, .mid = 0xf0, .spf = 9, .spt = 18, .hds = 2, }}, |
| 179 | {"2880", INIT(512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2){ .bps = 512, .spc = 2, .res = 1, .nft = 2, .rde = 240, .sec = 5760, .mid = 0xf0, .spf = 9, .spt = 36, .hds = 2, }} |
| 180 | }; |
| 181 | |
| 182 | static u_int8_t bootcode[] = { |
| 183 | 0xfa, /* cli */ |
| 184 | 0x31, 0xc0, /* xor ax,ax */ |
| 185 | 0x8e, 0xd0, /* mov ss,ax */ |
| 186 | 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ |
| 187 | 0xfb, /* sti */ |
| 188 | 0x8e, 0xd8, /* mov ds,ax */ |
| 189 | 0xe8, 0x00, 0x00, /* call $ + 3 */ |
| 190 | 0x5e, /* pop si */ |
| 191 | 0x83, 0xc6, 0x19, /* add si,+19h */ |
| 192 | 0xbb, 0x07, 0x00, /* mov bx,0007h */ |
| 193 | 0xfc, /* cld */ |
| 194 | 0xac, /* lodsb */ |
| 195 | 0x84, 0xc0, /* test al,al */ |
| 196 | 0x74, 0x06, /* jz $ + 8 */ |
| 197 | 0xb4, 0x0e, /* mov ah,0eh */ |
| 198 | 0xcd, 0x10, /* int 10h */ |
| 199 | 0xeb, 0xf5, /* jmp $ - 9 */ |
| 200 | 0x30, 0xe4, /* xor ah,ah */ |
| 201 | 0xcd, 0x16, /* int 16h */ |
| 202 | 0xcd, 0x19, /* int 19h */ |
| 203 | 0x0d, 0x0a, |
| 204 | 'N', 'o', 'n', '-', 's', 'y', 's', 't', |
| 205 | 'e', 'm', ' ', 'd', 'i', 's', 'k', |
| 206 | 0x0d, 0x0a, |
| 207 | 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', |
| 208 | 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', |
| 209 | ' ', 'r', 'e', 'b', 'o', 'o', 't', |
| 210 | 0x0d, 0x0a, |
| 211 | 0 |
| 212 | }; |
| 213 | |
| 214 | static int got_siginfo = 0; /* received a SIGINFO */ |
| 215 | |
| 216 | static int getstdfmt(const char *, struct bpb *); |
| 217 | static int getbpbinfo(int, const char *, const char *, int, struct bpb *, int); |
| 218 | static void print_bpb(struct bpb *); |
| 219 | static int ckgeom(const char *, u_int, const char *); |
| 220 | static int oklabel(const char *); |
| 221 | static void mklabel(u_int8_t *, const char *); |
| 222 | static void setstr(u_int8_t *, const char *, size_t); |
| 223 | static void infohandler(int sig); |
| 224 | |
| 225 | int |
| 226 | mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op) |
| 227 | { |
| 228 | char buf[PATH_MAX1024]; |
| 229 | struct stat sb; |
| 230 | struct timeval tv; |
| 231 | struct bpb bpb; |
| 232 | struct tm *tm; |
| 233 | struct bs *bs; |
| 234 | struct bsbpb *bsbpb; |
| 235 | struct bsxbpb *bsxbpb; |
| 236 | struct bsx *bsx; |
| 237 | struct de *de; |
| 238 | u_int8_t *img; |
| 239 | const char *bname; |
| 240 | ssize_t n; |
| 241 | time_t now; |
| 242 | u_int bss, rds, cls, dir, lsn, x, x1, x2; |
| 243 | int ch, fd, fd1; |
| 244 | struct msdos_options o = *op; |
| 245 | int oflags = O_RDWR0x0002 | O_CREAT0x0200; |
| 246 | |
| 247 | if (o.block_size && o.sectors_per_cluster) { |
| 248 | warnx("Cannot specify both block size and sectors per cluster"); |
| 249 | return -1; |
| 250 | } |
| 251 | if (o.OEM_string && strlen(o.OEM_string) > 8) { |
| 252 | warnx("%s: bad OEM string", o.OEM_string); |
| 253 | return -1; |
| 254 | } |
| 255 | if (o.create_size) { |
| 256 | if (o.offset == 0) |
| 257 | oflags |= O_TRUNC0x0400; |
| 258 | fd = open(fname, oflags, 0644); |
| 259 | if (fd == -1) { |
| 260 | warnx("failed to create %s", fname); |
| 261 | return -1; |
| 262 | } |
| 263 | (void)lseek(fd, o.create_size - 1, SEEK_SET0); |
| 264 | if (write(fd, "\0", 1) != 1) { |
| 265 | warn("failed to set file size"); |
| 266 | return -1; |
| 267 | } |
| 268 | (void)lseek(fd, 0, SEEK_SET0); |
| 269 | } else if ((fd = open(fname, O_RDWR0x0002)) == -1 || |
| 270 | fstat(fd, &sb)) { |
| 271 | warn("%s", fname); |
| 272 | return -1; |
| 273 | } |
| 274 | if (!S_ISCHR(sb.st_mode)((sb.st_mode & 0170000) == 0020000) && !o.create_size) { |
| 275 | warnx("warning, %s is not a character device", fname); |
| 276 | return -1; |
| 277 | } |
| 278 | if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET0)) { |
| 279 | warnx("cannot seek to %jd", (intmax_t)o.offset); |
| 280 | return -1; |
| 281 | } |
| 282 | memset(&bpb, 0, sizeof(bpb)); |
| 283 | if (o.floppy) { |
| 284 | if (getstdfmt(o.floppy, &bpb) == -1) |
| 285 | return -1; |
| 286 | bpb.bsec = bpb.sec; |
| 287 | bpb.sec = 0; |
| 288 | bpb.bspf = bpb.spf; |
| 289 | bpb.spf = 0; |
| 290 | } |
| 291 | if (o.drive_heads) |
| 292 | bpb.hds = o.drive_heads; |
| 293 | if (o.sectors_per_track) |
| 294 | bpb.spt = o.sectors_per_track; |
| 295 | if (o.bytes_per_sector) |
| 296 | bpb.bps = o.bytes_per_sector; |
| 297 | if (o.size) |
| 298 | bpb.bsec = o.size; |
| 299 | if (o.hidden_sectors_set) |
| 300 | bpb.hid = o.hidden_sectors; |
| 301 | if (!(o.floppy || (o.drive_heads && o.sectors_per_track && |
| 302 | o.bytes_per_sector && o.size && o.hidden_sectors_set))) { |
| 303 | if (getbpbinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb, |
| 304 | o.create_size != 0) == -1) |
| 305 | return -1; |
| 306 | bpb.bsec -= (o.offset / bpb.bps); |
| 307 | if (bpb.spc == 0) { /* set defaults */ |
| 308 | /* minimum cluster size */ |
| 309 | switch (o.fat_type) { |
| 310 | case 12: |
| 311 | bpb.spc = 1; /* use 512 bytes */ |
| 312 | x = 2; /* up to 2MB */ |
| 313 | break; |
| 314 | case 16: |
| 315 | bpb.spc = 1; /* use 512 bytes */ |
| 316 | x = 32; /* up to 32MB */ |
| 317 | break; |
| 318 | default: |
| 319 | bpb.spc = 8; /* use 4k */ |
| 320 | x = 8192; /* up to 8GB */ |
| 321 | break; |
| 322 | } |
| 323 | x1 = howmany(bpb.bsec, (1048576 / 512))(((bpb.bsec) + (((1048576 / 512)) - 1)) / ((1048576 / 512))); /* -> MB */ |
| 324 | while (bpb.spc < 128 && x < x1) { |
| 325 | x *= 2; |
| 326 | bpb.spc *= 2; |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | if (o.volume_label && !oklabel(o.volume_label)) { |
| 332 | warnx("%s: bad volume label", o.volume_label); |
| 333 | return -1; |
| 334 | } |
| 335 | |
| 336 | switch (o.fat_type) { |
| 337 | case 0: |
| 338 | if (o.floppy) |
| 339 | o.fat_type = 12; |
| 340 | else if (!o.directory_entries && (o.info_sector || o.backup_sector)) |
| 341 | o.fat_type = 32; |
| 342 | break; |
| 343 | case 12: |
| 344 | case 16: |
| 345 | if (o.info_sector) { |
| 346 | warnx("Cannot specify info sector with FAT%u", o.fat_type); |
| 347 | return -1; |
| 348 | } |
| 349 | if (o.backup_sector) { |
| 350 | warnx("Cannot specify backup sector with FAT%u", o.fat_type); |
| 351 | return -1; |
| 352 | } |
| 353 | break; |
| 354 | case 32: |
| 355 | if (o.directory_entries) { |
| 356 | warnx("Cannot specify directory entries with FAT32"); |
| 357 | return -1; |
| 358 | } |
| 359 | break; |
| 360 | default: |
| 361 | warnx("%d: bad FAT type", o.fat_type); |
| 362 | return -1; |
| 363 | } |
| 364 | if (!powerof2(bpb.bps)((((bpb.bps)-1)&(bpb.bps))==0)) { |
| 365 | warnx("bytes/sector (%u) is not a power of 2", bpb.bps); |
| 366 | return -1; |
| 367 | } |
| 368 | if (bpb.bps < MINBPS512) { |
| 369 | warnx("bytes/sector (%u) is too small; minimum is %u", |
| 370 | bpb.bps, MINBPS512); |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | if (o.floppy && o.fat_type == 32) |
| 375 | bpb.rde = 0; |
| 376 | if (o.block_size) { |
| 377 | if (!powerof2(o.block_size)((((o.block_size)-1)&(o.block_size))==0)) { |
| 378 | warnx("block size (%u) is not a power of 2", o.block_size); |
| 379 | return -1; |
| 380 | } |
| 381 | if (o.block_size < bpb.bps) { |
| 382 | warnx("block size (%u) is too small; minimum is %u", |
| 383 | o.block_size, bpb.bps); |
| 384 | return -1; |
| 385 | } |
| 386 | if (o.block_size > bpb.bps * MAXSPC128) { |
| 387 | warnx("block size (%u) is too large; maximum is %u", |
| 388 | o.block_size, bpb.bps * MAXSPC128); |
| 389 | return -1; |
| 390 | } |
| 391 | bpb.spc = o.block_size / bpb.bps; |
| 392 | } |
| 393 | if (o.sectors_per_cluster) { |
| 394 | if (!powerof2(o.sectors_per_cluster)((((o.sectors_per_cluster)-1)&(o.sectors_per_cluster))==0 )) { |
| 395 | warnx("sectors/cluster (%u) is not a power of 2", |
| 396 | o.sectors_per_cluster); |
| 397 | return -1; |
| 398 | } |
| 399 | bpb.spc = o.sectors_per_cluster; |
| 400 | } |
| 401 | if (o.reserved_sectors) |
| 402 | bpb.res = o.reserved_sectors; |
| 403 | if (o.num_FAT) { |
| 404 | if (o.num_FAT > MAXNFT16) { |
| 405 | warnx("number of FATs (%u) is too large; maximum is %u", |
| 406 | o.num_FAT, MAXNFT16); |
| 407 | return -1; |
| 408 | } |
| 409 | bpb.nft = o.num_FAT; |
| 410 | } |
| 411 | if (o.directory_entries) |
| 412 | bpb.rde = o.directory_entries; |
| 413 | if (o.media_descriptor_set) { |
| 414 | if (o.media_descriptor < 0xf0) { |
| 415 | warnx("illegal media descriptor (%#x)", o.media_descriptor); |
| 416 | return -1; |
| 417 | } |
| 418 | bpb.mid = o.media_descriptor; |
| 419 | } |
| 420 | if (o.sectors_per_fat) |
| 421 | bpb.bspf = o.sectors_per_fat; |
| 422 | if (o.info_sector) |
| 423 | bpb.infs = o.info_sector; |
| 424 | if (o.backup_sector) |
| 425 | bpb.bkbs = o.backup_sector; |
| 426 | bss = 1; |
| 427 | bname = NULL((void *)0); |
| 428 | fd1 = -1; |
| 429 | if (o.bootstrap) { |
| 430 | bname = o.bootstrap; |
| 431 | if (!strchr(bname, '/')) { |
| 432 | snprintf(buf, sizeof(buf), "/boot/%s", bname); |
| 433 | if (!(bname = strdup(buf))) { |
| 434 | warn(NULL((void *)0)); |
| 435 | return -1; |
| 436 | } |
| 437 | } |
| 438 | if ((fd1 = open(bname, O_RDONLY0x0000)) == -1 || fstat(fd1, &sb)) { |
| 439 | warn("%s", bname); |
| 440 | return -1; |
| 441 | } |
| 442 | if (!S_ISREG(sb.st_mode)((sb.st_mode & 0170000) == 0100000) || sb.st_size % bpb.bps || |
| 443 | sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU160xffff) { |
| 444 | warnx("%s: inappropriate file type or format", bname); |
| 445 | return -1; |
| 446 | } |
| 447 | bss = sb.st_size / bpb.bps; |
| 448 | } |
| 449 | if (!bpb.nft) |
| 450 | bpb.nft = 2; |
| 451 | if (!o.fat_type) { |
| 452 | if (bpb.bsec < (bpb.res ? bpb.res : bss) + |
| 453 | 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)) |
| 454 | ((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)) * |
| 455 | bpb.nft + |
| 456 | howmany(bpb.rde ? bpb.rde : DEFRDE,(((bpb.rde ? bpb.rde : 512) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof(struct de))) |
| 457 | bpb.bps / sizeof(struct de))(((bpb.rde ? bpb.rde : 512) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof(struct de))) + |
| 458 | (bpb.spc ? MINCLS160xff5 : MAXCLS120xff4 + 1) * |
| 459 | (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps)(((4096) + ((bpb.bps) - 1)) / (bpb.bps)))) |
| 460 | o.fat_type = 12; |
| 461 | else if (bpb.rde || bpb.bsec < |
| 462 | (bpb.res ? bpb.res : bss) + |
| 463 | howmany((RESFTE + MAXCLS16) * 2, bpb.bps)((((2 + 0xfff4) * 2) + ((bpb.bps) - 1)) / (bpb.bps)) * bpb.nft + |
| 464 | howmany(DEFRDE, bpb.bps / sizeof(struct de))(((512) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof (struct de))) + |
| 465 | (MAXCLS160xfff4 + 1) * |
| 466 | (bpb.spc ? bpb.spc : howmany(8192, bpb.bps)(((8192) + ((bpb.bps) - 1)) / (bpb.bps)))) |
| 467 | o.fat_type = 16; |
| 468 | else |
| 469 | o.fat_type = 32; |
| 470 | } |
| 471 | x = bss; |
| 472 | if (o.fat_type == 32) { |
| 473 | if (!bpb.infs) { |
| 474 | if (x == MAXU160xffff || x == bpb.bkbs) { |
| 475 | warnx("no room for info sector"); |
| 476 | return -1; |
| 477 | } |
| 478 | bpb.infs = x; |
| 479 | } |
| 480 | if (bpb.infs != MAXU160xffff && x <= bpb.infs) |
| 481 | x = bpb.infs + 1; |
| 482 | if (!bpb.bkbs) { |
| 483 | if (x == MAXU160xffff) { |
| 484 | warnx("no room for backup sector"); |
| 485 | return -1; |
| 486 | } |
| 487 | bpb.bkbs = x; |
| 488 | } else if (bpb.bkbs != MAXU160xffff && bpb.bkbs == bpb.infs) { |
| 489 | warnx("backup sector would overwrite info sector"); |
| 490 | return -1; |
| 491 | } |
| 492 | if (bpb.bkbs != MAXU160xffff && x <= bpb.bkbs) |
| 493 | x = bpb.bkbs + 1; |
| 494 | } |
| 495 | if (!bpb.res) |
| 496 | bpb.res = o.fat_type == 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; |
| 497 | else if (bpb.res < x) { |
| 498 | warnx("too few reserved sectors (need %d have %d)", x, bpb.res); |
| 499 | return -1; |
| 500 | } |
| 501 | if (o.fat_type != 32 && !bpb.rde) |
| 502 | bpb.rde = DEFRDE512; |
| 503 | rds = howmany(bpb.rde, bpb.bps / sizeof(struct de))(((bpb.rde) + ((bpb.bps / sizeof(struct de)) - 1)) / (bpb.bps / sizeof(struct de))); |
| 504 | if (!bpb.spc) |
| 505 | for (bpb.spc = howmany(o.fat_type == 16 ? DEFBLK16 : DEFBLK, bpb.bps)(((o.fat_type == 16 ? 2048 : 4096) + ((bpb.bps) - 1)) / (bpb. bps)); |
| 506 | bpb.spc < MAXSPC128 && |
| 507 | bpb.res + |
| 508 | howmany((RESFTE + maxcls(o.fat_type)) * (o.fat_type / BPN),((((2 + ((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4)) * (o.fat_type / 4)) + ((bpb.bps * 2) - 1)) / ( bpb.bps * 2)) |
| 509 | bpb.bps * NPB)((((2 + ((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4)) * (o.fat_type / 4)) + ((bpb.bps * 2) - 1)) / ( bpb.bps * 2)) * bpb.nft + |
| 510 | rds + |
| 511 | (u_int64_t)(maxcls(o.fat_type)((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4 ) + 1) * bpb.spc <= bpb.bsec; |
| 512 | bpb.spc <<= 1); |
| 513 | if (o.fat_type != 32 && bpb.bspf > MAXU160xffff) { |
| 514 | warnx("too many sectors/FAT for FAT12/16"); |
| 515 | return -1; |
| 516 | } |
| 517 | x1 = bpb.res + rds; |
| 518 | x = bpb.bspf ? bpb.bspf : 1; |
| 519 | if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) { |
| 520 | warnx("meta data exceeds file system size"); |
| 521 | return -1; |
| 522 | } |
| 523 | x1 += x * bpb.nft; |
| 524 | x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB2 / |
| 525 | (bpb.spc * bpb.bps * NPB2 + o.fat_type / BPN4 * bpb.nft); |
| 526 | x2 = howmany((RESFTE + MINIMUM(x, maxcls(o.fat_type))) * (o.fat_type / BPN),((((2 + (((x) < (((o.fat_type) == 12 ? 0xff4 : (o.fat_type ) == 16 ? 0xfff4 : 0xffffff4))) ? (x) : (((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4)))) * (o.fat_type / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)) |
| 527 | bpb.bps * NPB)((((2 + (((x) < (((o.fat_type) == 12 ? 0xff4 : (o.fat_type ) == 16 ? 0xfff4 : 0xffffff4))) ? (x) : (((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4)))) * (o.fat_type / 4)) + ((bpb.bps * 2) - 1)) / (bpb.bps * 2)); |
| 528 | if (!bpb.bspf) { |
| 529 | bpb.bspf = x2; |
| 530 | x1 += (bpb.bspf - 1) * bpb.nft; |
| 531 | } |
| 532 | cls = (bpb.bsec - x1) / bpb.spc; |
| 533 | x = (u_int64_t)bpb.bspf * bpb.bps * NPB2 / (o.fat_type / BPN4) - RESFTE2; |
| 534 | if (cls > x) |
| 535 | cls = x; |
| 536 | if (bpb.bspf < x2) { |
| 537 | warnx("warning: sectors/FAT limits file system to %u clusters", |
| 538 | cls); |
| 539 | return -1; |
| 540 | } |
| 541 | if (cls < mincls(o.fat_type)((o.fat_type) == 12 ? 1 : (o.fat_type) == 16 ? 0xff5 : 0xfff5 )) { |
| 542 | warnx("%u clusters too few clusters for FAT%u, need %u", cls, |
| 543 | o.fat_type, mincls(o.fat_type)((o.fat_type) == 12 ? 1 : (o.fat_type) == 16 ? 0xff5 : 0xfff5 )); |
| 544 | return -1; |
| 545 | } |
| 546 | if (cls > maxcls(o.fat_type)((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4 )) { |
| 547 | cls = maxcls(o.fat_type)((o.fat_type) == 12 ? 0xff4 : (o.fat_type) == 16 ? 0xfff4 : 0xffffff4 ); |
| 548 | bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; |
| 549 | warnx("warning: FAT type limits file system to %u sectors", |
| 550 | bpb.bsec); |
| 551 | return -1; |
| 552 | } |
| 553 | printf("%s: %u sector%s in %u FAT%u cluster%s " |
| 554 | "(%u bytes/cluster)\n", fname, cls * bpb.spc, |
| 555 | cls * bpb.spc == 1 ? "" : "s", cls, o.fat_type, |
| 556 | cls == 1 ? "" : "s", bpb.bps * bpb.spc); |
| 557 | if (!bpb.mid) |
| 558 | bpb.mid = !bpb.hid ? 0xf0 : 0xf8; |
| 559 | if (o.fat_type == 32) |
| 560 | bpb.rdcl = RESFTE2; |
| 561 | if (bpb.hid + bpb.bsec <= MAXU160xffff) { |
| 562 | bpb.sec = bpb.bsec; |
| 563 | bpb.bsec = 0; |
| 564 | } |
| 565 | if (o.fat_type != 32) { |
| 566 | bpb.spf = bpb.bspf; |
| 567 | bpb.bspf = 0; |
| 568 | } |
| 569 | ch = 0; |
| 570 | if (o.fat_type == 12) |
| 571 | ch = 1; /* 001 Primary DOS with 12 bit FAT */ |
| 572 | else if (o.fat_type == 16) { |
| 573 | if (bpb.bsec == 0) |
| 574 | ch = 4; /* 004 Primary DOS with 16 bit FAT <32M */ |
| 575 | else |
| 576 | ch = 6; /* 006 Primary 'big' DOS, 16-bit FAT (> 32MB) */ |
| 577 | /* |
| 578 | * XXX: what about: |
| 579 | * 014 DOS (16-bit FAT) - LBA |
| 580 | * ? |
| 581 | */ |
| 582 | } else if (o.fat_type == 32) { |
| 583 | ch = 11; /* 011 Primary DOS with 32 bit FAT */ |
| 584 | /* |
| 585 | * XXX: what about: |
| 586 | * 012 Primary DOS with 32 bit FAT - LBA |
| 587 | * ? |
| 588 | */ |
| 589 | } |
| 590 | if (ch != 0) |
| 591 | printf("MBR type: %d\n", ch); |
| 592 | print_bpb(&bpb); |
| 593 | |
| 594 | gettimeofday(&tv, NULL((void *)0)); |
| 595 | now = tv.tv_sec; |
| 596 | tm = localtime(&now); |
| 597 | img = emalloc(bpb.bps); |
| 598 | dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; |
| 599 | signal(SIGINFO29, infohandler); |
| 600 | for (lsn = 0; lsn < dir + (o.fat_type == 32 ? bpb.spc : rds); lsn++) { |
| 601 | if (got_siginfo) { |
| 602 | fprintf(stderr(&__sF[2]),"%s: writing sector %u of %u (%u%%)\n", |
| 603 | fname,lsn,(dir + (o.fat_type == 32 ? bpb.spc : rds)), |
| 604 | (lsn*100)/(dir + (o.fat_type == 32 ? bpb.spc : rds))); |
| 605 | got_siginfo = 0; |
| 606 | } |
| 607 | x = lsn; |
| 608 | if (o.bootstrap && |
| 609 | o.fat_type == 32 && bpb.bkbs != MAXU160xffff && |
| 610 | bss <= bpb.bkbs && x >= bpb.bkbs) { |
| 611 | x -= bpb.bkbs; |
| 612 | if (!x && lseek(fd1, o.offset, SEEK_SET0)) { |
| 613 | warn("%s", bname); |
| 614 | return -1; |
| 615 | } |
| 616 | } |
| 617 | if (o.bootstrap && x < bss) { |
| 618 | if ((n = read(fd1, img, bpb.bps)) == -1) { |
| 619 | warn("%s", bname); |
| 620 | return -1; |
| 621 | } |
| 622 | if ((size_t)n != bpb.bps) { |
| 623 | warnx("%s: can't read sector %u", bname, x); |
| 624 | return -1; |
| 625 | } |
| 626 | } else |
| 627 | memset(img, 0, bpb.bps); |
| 628 | if (!lsn || |
| 629 | (o.fat_type == 32 && bpb.bkbs != MAXU160xffff && lsn == bpb.bkbs)) { |
| 630 | x1 = sizeof(struct bs); |
| 631 | bsbpb = (struct bsbpb *)(img + x1); |
| 632 | mk2(bsbpb->bps, bpb.bps)(bsbpb->bps)[0] = (u_int8_t)(bpb.bps), (bsbpb->bps)[1] = (u_int8_t)((bpb.bps) >> 010); |
| 633 | mk1(bsbpb->spc, bpb.spc)(bsbpb->spc) = (u_int8_t)(bpb.spc); |
| 634 | mk2(bsbpb->res, bpb.res)(bsbpb->res)[0] = (u_int8_t)(bpb.res), (bsbpb->res)[1] = (u_int8_t)((bpb.res) >> 010); |
| 635 | mk1(bsbpb->nft, bpb.nft)(bsbpb->nft) = (u_int8_t)(bpb.nft); |
| 636 | mk2(bsbpb->rde, bpb.rde)(bsbpb->rde)[0] = (u_int8_t)(bpb.rde), (bsbpb->rde)[1] = (u_int8_t)((bpb.rde) >> 010); |
| 637 | mk2(bsbpb->sec, bpb.sec)(bsbpb->sec)[0] = (u_int8_t)(bpb.sec), (bsbpb->sec)[1] = (u_int8_t)((bpb.sec) >> 010); |
| 638 | mk1(bsbpb->mid, bpb.mid)(bsbpb->mid) = (u_int8_t)(bpb.mid); |
| 639 | mk2(bsbpb->spf, bpb.spf)(bsbpb->spf)[0] = (u_int8_t)(bpb.spf), (bsbpb->spf)[1] = (u_int8_t)((bpb.spf) >> 010); |
| 640 | mk2(bsbpb->spt, bpb.spt)(bsbpb->spt)[0] = (u_int8_t)(bpb.spt), (bsbpb->spt)[1] = (u_int8_t)((bpb.spt) >> 010); |
| 641 | mk2(bsbpb->hds, bpb.hds)(bsbpb->hds)[0] = (u_int8_t)(bpb.hds), (bsbpb->hds)[1] = (u_int8_t)((bpb.hds) >> 010); |
| 642 | 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); |
| 643 | 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); |
| 644 | x1 += sizeof(struct bsbpb); |
| 645 | if (o.fat_type == 32) { |
| 646 | bsxbpb = (struct bsxbpb *)(img + x1); |
| 647 | 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); |
| 648 | mk2(bsxbpb->xflg, 0)(bsxbpb->xflg)[0] = (u_int8_t)(0), (bsxbpb->xflg)[1] = ( u_int8_t)((0) >> 010); |
| 649 | mk2(bsxbpb->vers, 0)(bsxbpb->vers)[0] = (u_int8_t)(0), (bsxbpb->vers)[1] = ( u_int8_t)((0) >> 010); |
| 650 | 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); |
| 651 | mk2(bsxbpb->infs, bpb.infs)(bsxbpb->infs)[0] = (u_int8_t)(bpb.infs), (bsxbpb->infs )[1] = (u_int8_t)((bpb.infs) >> 010); |
| 652 | mk2(bsxbpb->bkbs, bpb.bkbs)(bsxbpb->bkbs)[0] = (u_int8_t)(bpb.bkbs), (bsxbpb->bkbs )[1] = (u_int8_t)((bpb.bkbs) >> 010); |
| 653 | x1 += sizeof(struct bsxbpb); |
| 654 | } |
| 655 | bsx = (struct bsx *)(img + x1); |
| 656 | mk1(bsx->sig, 0x29)(bsx->sig) = (u_int8_t)(0x29); |
| 657 | if (o.volume_id_set) |
| 658 | x = o.volume_id; |
| 659 | else |
| 660 | x = (((u_int)(1 + tm->tm_mon) << 8 | |
| 661 | (u_int)tm->tm_mday) + |
| 662 | ((u_int)tm->tm_sec << 8 | |
| 663 | (u_int)(tv.tv_usec / 10))) << 16 | |
| 664 | ((u_int)(1900 + tm->tm_year) + |
| 665 | ((u_int)tm->tm_hour << 8 | |
| 666 | (u_int)tm->tm_min)); |
| 667 | 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); |
| 668 | mklabel(bsx->label, o.volume_label ? o.volume_label : "NO NAME"); |
| 669 | snprintf(buf, sizeof(buf), "FAT%u", o.fat_type); |
| 670 | setstr(bsx->type, buf, sizeof(bsx->type)); |
| 671 | if (!o.bootstrap) { |
| 672 | x1 += sizeof(struct bsx); |
| 673 | bs = (struct bs *)img; |
| 674 | mk1(bs->jmp[0], 0xeb)(bs->jmp[0]) = (u_int8_t)(0xeb); |
| 675 | mk1(bs->jmp[1], x1 - 2)(bs->jmp[1]) = (u_int8_t)(x1 - 2); |
| 676 | mk1(bs->jmp[2], 0x90)(bs->jmp[2]) = (u_int8_t)(0x90); |
| 677 | setstr(bs->oem, o.OEM_string ? o.OEM_string : "NetBSD", |
| 678 | sizeof(bs->oem)); |
| 679 | memcpy(img + x1, bootcode, sizeof(bootcode)); |
| 680 | mk2(img + MINBPS - 2, DOSMAGIC)(img + 512 - 2)[0] = (u_int8_t)(0xaa55), (img + 512 - 2)[1] = (u_int8_t)((0xaa55) >> 010); |
| 681 | } |
| 682 | } else if (o.fat_type == 32 && bpb.infs != MAXU160xffff && |
| 683 | (lsn == bpb.infs || |
| 684 | (bpb.bkbs != MAXU160xffff && |
| 685 | lsn == bpb.bkbs + bpb.infs))) { |
| 686 | 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); |
| 687 | 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); |
| 688 | 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); |
| 689 | 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); |
| 690 | mk2(img + MINBPS - 2, DOSMAGIC)(img + 512 - 2)[0] = (u_int8_t)(0xaa55), (img + 512 - 2)[1] = (u_int8_t)((0xaa55) >> 010); |
| 691 | } else if (lsn >= bpb.res && lsn < dir && |
| 692 | !((lsn - bpb.res) % |
| 693 | (bpb.spf ? bpb.spf : bpb.bspf))) { |
| 694 | mk1(img[0], bpb.mid)(img[0]) = (u_int8_t)(bpb.mid); |
| 695 | for (x = 1; x < o.fat_type * (o.fat_type == 32 ? 3U : 2U) / 8U; x++) |
| 696 | mk1(img[x], o.fat_type == 32 && x % 4 == 3 ? 0x0f : 0xff)(img[x]) = (u_int8_t)(o.fat_type == 32 && x % 4 == 3 ? 0x0f : 0xff); |
| 697 | } else if (lsn == dir && o.volume_label) { |
| 698 | de = (struct de *)img; |
| 699 | mklabel(de->namext, o.volume_label); |
| 700 | mk1(de->attr, 050)(de->attr) = (u_int8_t)(050); |
| 701 | x = (u_int)tm->tm_hour << 11 | |
| 702 | (u_int)tm->tm_min << 5 | |
| 703 | (u_int)tm->tm_sec >> 1; |
| 704 | mk2(de->time, x)(de->time)[0] = (u_int8_t)(x), (de->time)[1] = (u_int8_t )((x) >> 010); |
| 705 | x = (u_int)(tm->tm_year - 80) << 9 | |
| 706 | (u_int)(tm->tm_mon + 1) << 5 | |
| 707 | (u_int)tm->tm_mday; |
| 708 | mk2(de->date, x)(de->date)[0] = (u_int8_t)(x), (de->date)[1] = (u_int8_t )((x) >> 010); |
| 709 | } |
| 710 | if ((n = write(fd, img, bpb.bps)) == -1) { |
| 711 | warn("%s", fname); |
| 712 | return -1; |
| 713 | } |
| 714 | if ((size_t)n != bpb.bps) { |
| 715 | warnx("%s: can't write sector %u", fname, lsn); |
| 716 | return -1; |
| 717 | } |
| 718 | } |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | |
| 723 | /* |
| 724 | * Get a standard format. |
| 725 | */ |
| 726 | static int |
| 727 | getstdfmt(const char *fmt, struct bpb *bpb) |
| 728 | { |
| 729 | u_int x, i; |
| 730 | |
| 731 | x = sizeof(stdfmt) / sizeof(stdfmt[0]); |
| 732 | for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); |
| 733 | if (i == x) { |
| 734 | warnx("%s: unknown standard format", fmt); |
| 735 | return -1; |
| 736 | } |
| 737 | *bpb = stdfmt[i].bpb; |
| 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | /* |
| 742 | * Get disk slice, partition, and geometry information. |
| 743 | */ |
| 744 | static int |
| 745 | getbpbinfo(int fd, const char *fname, const char *dtype, int iflag, |
| 746 | struct bpb *bpb, int create) |
| 747 | { |
| 748 | const char *s1, *s2; |
| 749 | int part; |
| 750 | |
| 751 | part = -1; |
| 752 | s1 = fname; |
| 753 | if ((s2 = strrchr(s1, '/'))) |
| 754 | s1 = s2 + 1; |
| 755 | for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++); |
| 756 | if (!*s2 || s2 == s1) |
| 757 | s2 = NULL((void *)0); |
| 758 | else |
| 759 | while (isdigit((unsigned char)*++s2)); |
| 760 | s1 = s2; |
Value stored to 's1' is never read | |
| 761 | |
| 762 | if (((part != -1) && ((!iflag && part != -1) || !bpb->bsec)) || |
| 763 | !bpb->bps || !bpb->spt || !bpb->hds) { |
| 764 | u_int sector_size; |
| 765 | u_int nsectors; |
| 766 | u_int ntracks; |
| 767 | u_int size; |
| 768 | { |
| 769 | struct stat st; |
| 770 | |
| 771 | if (fstat(fd, &st) == -1) { |
| 772 | warnx("Can't get disk size for `%s'", fname); |
| 773 | return -1; |
| 774 | } |
| 775 | /* create a fake geometry for a file image */ |
| 776 | sector_size = 512; |
| 777 | nsectors = 63; |
| 778 | ntracks = 255; |
| 779 | size = st.st_size / sector_size; |
| 780 | } |
| 781 | if (!bpb->bps) { |
| 782 | if (ckgeom(fname, sector_size, "bytes/sector") == -1) |
| 783 | return -1; |
| 784 | bpb->bps = sector_size; |
| 785 | } |
| 786 | |
| 787 | if (nsectors > 63) { |
| 788 | /* |
| 789 | * The kernel doesn't accept BPB with spt > 63. |
| 790 | * (see sys/fs/msdosfs/msdosfs_vfsops.c:msdosfs_mountfs()) |
| 791 | * If values taken from disklabel don't match these |
| 792 | * restrictions, use popular BIOS default values instead. |
| 793 | */ |
| 794 | nsectors = 63; |
| 795 | } |
| 796 | if (!bpb->spt) { |
| 797 | if (ckgeom(fname, nsectors, "sectors/track") == -1) |
| 798 | return -1; |
| 799 | bpb->spt = nsectors; |
| 800 | } |
| 801 | if (!bpb->hds) { |
| 802 | if (ckgeom(fname, ntracks, "drive heads") == -1) |
| 803 | return -1; |
| 804 | bpb->hds = ntracks; |
| 805 | } |
| 806 | if (!bpb->bsec) |
| 807 | bpb->bsec = size; |
| 808 | } |
| 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | /* |
| 813 | * Print out BPB values. |
| 814 | */ |
| 815 | static void |
| 816 | print_bpb(struct bpb *bpb) |
| 817 | { |
| 818 | printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, |
| 819 | bpb->nft); |
| 820 | if (bpb->rde) |
| 821 | printf(" rde=%u", bpb->rde); |
| 822 | if (bpb->sec) |
| 823 | printf(" sec=%u", bpb->sec); |
| 824 | printf(" mid=%#x", bpb->mid); |
| 825 | if (bpb->spf) |
| 826 | printf(" spf=%u", bpb->spf); |
| 827 | printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); |
| 828 | if (bpb->bsec) |
| 829 | printf(" bsec=%u", bpb->bsec); |
| 830 | if (!bpb->spf) { |
| 831 | printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); |
| 832 | printf(" infs="); |
| 833 | printf(bpb->infs == MAXU160xffff ? "%#x" : "%u", bpb->infs); |
| 834 | printf(" bkbs="); |
| 835 | printf(bpb->bkbs == MAXU160xffff ? "%#x" : "%u", bpb->bkbs); |
| 836 | } |
| 837 | printf("\n"); |
| 838 | } |
| 839 | |
| 840 | /* |
| 841 | * Check a disk geometry value. |
| 842 | */ |
| 843 | static int |
| 844 | ckgeom(const char *fname, u_int val, const char *msg) |
| 845 | { |
| 846 | if (!val) { |
| 847 | warnx("%s: no default %s", fname, msg); |
| 848 | return -1; |
| 849 | } |
| 850 | if (val > MAXU160xffff) { |
| 851 | warnx("%s: illegal %s", fname, msg); |
| 852 | return -1; |
| 853 | } |
| 854 | return 0; |
| 855 | } |
| 856 | /* |
| 857 | * Check a volume label. |
| 858 | */ |
| 859 | static int |
| 860 | oklabel(const char *src) |
| 861 | { |
| 862 | int c, i; |
| 863 | |
| 864 | for (i = 0; i <= 11; i++) { |
| 865 | c = (u_char)*src++; |
| 866 | if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) |
| 867 | break; |
| 868 | } |
| 869 | return i && !c; |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * Make a volume label. |
| 874 | */ |
| 875 | static void |
| 876 | mklabel(u_int8_t *dest, const char *src) |
| 877 | { |
| 878 | int c, i; |
| 879 | |
| 880 | for (i = 0; i < 11; i++) { |
| 881 | c = *src ? toupper((unsigned char)*src++) : ' '; |
| 882 | *dest++ = !i && c == '\xe5' ? 5 : c; |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | /* |
| 887 | * Copy string, padding with spaces. |
| 888 | */ |
| 889 | static void |
| 890 | setstr(u_int8_t *dest, const char *src, size_t len) |
| 891 | { |
| 892 | while (len--) |
| 893 | *dest++ = *src ? *src++ : ' '; |
| 894 | } |
| 895 | |
| 896 | static void |
| 897 | infohandler(int sig) |
| 898 | { |
| 899 | got_siginfo = 1; |
| 900 | } |