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 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <sys/param.h> 34 #include <sys/fdcio.h> 35 #include <sys/disk.h> 36 #include <sys/disklabel.h> 37 #include <sys/mount.h> 38 #include <sys/stat.h> 39 #include <sys/time.h> 40 41 #include <ctype.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 #define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ 55 #define BPN 4 /* bits per nibble */ 56 #define NPB 2 /* nibbles per byte */ 57 58 #define DOSMAGIC 0xaa55 /* DOS magic number */ 59 #define MINBPS 512 /* minimum bytes per sector */ 60 #define MAXSPC 128 /* maximum sectors per cluster */ 61 #define MAXNFT 16 /* maximum number of FATs */ 62 #define DEFBLK 4096 /* default block size */ 63 #define DEFBLK16 2048 /* default block size FAT16 */ 64 #define DEFRDE 512 /* default root directory entries */ 65 #define RESFTE 2 /* reserved FAT entries */ 66 #define MINCLS12 1U /* minimum FAT12 clusters */ 67 #define MINCLS16 0xff5U /* minimum FAT16 clusters */ 68 #define MINCLS32 0xfff5U /* minimum FAT32 clusters */ 69 #define MAXCLS12 0xff4U /* maximum FAT12 clusters */ 70 #define MAXCLS16 0xfff4U /* maximum FAT16 clusters */ 71 #define MAXCLS32 0xffffff4U /* maximum FAT32 clusters */ 72 73 #define mincls(fat) ((fat) == 12 ? MINCLS12 : \ 74 (fat) == 16 ? MINCLS16 : \ 75 MINCLS32) 76 77 #define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ 78 (fat) == 16 ? MAXCLS16 : \ 79 MAXCLS32) 80 81 #define mk1(p, x) \ 82 (p) = (u_int8_t)(x) 83 84 #define mk2(p, x) \ 85 (p)[0] = (u_int8_t)(x), \ 86 (p)[1] = (u_int8_t)((x) >> 010) 87 88 #define mk4(p, x) \ 89 (p)[0] = (u_int8_t)(x), \ 90 (p)[1] = (u_int8_t)((x) >> 010), \ 91 (p)[2] = (u_int8_t)((x) >> 020), \ 92 (p)[3] = (u_int8_t)((x) >> 030) 93 94 #define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) 95 #define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) 96 #define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) 97 #define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) 98 99 struct bs { 100 u_int8_t bsJump[3]; /* bootstrap entry point */ 101 u_int8_t bsOemName[8]; /* OEM name and version */ 102 } __packed; 103 104 struct bsbpb { 105 u_int8_t bpbBytesPerSec[2]; /* bytes per sector */ 106 u_int8_t bpbSecPerClust; /* sectors per cluster */ 107 u_int8_t bpbResSectors[2]; /* reserved sectors */ 108 u_int8_t bpbFATs; /* number of FATs */ 109 u_int8_t bpbRootDirEnts[2]; /* root directory entries */ 110 u_int8_t bpbSectors[2]; /* total sectors */ 111 u_int8_t bpbMedia; /* media descriptor */ 112 u_int8_t bpbFATsecs[2]; /* sectors per FAT */ 113 u_int8_t bpbSecPerTrack[2]; /* sectors per track */ 114 u_int8_t bpbHeads[2]; /* drive heads */ 115 u_int8_t bpbHiddenSecs[4]; /* hidden sectors */ 116 u_int8_t bpbHugeSectors[4]; /* big total sectors */ 117 } __packed; 118 119 struct bsxbpb { 120 u_int8_t bpbBigFATsecs[4]; /* big sectors per FAT */ 121 u_int8_t bpbExtFlags[2]; /* FAT control flags */ 122 u_int8_t bpbFSVers[2]; /* file system version */ 123 u_int8_t bpbRootClust[4]; /* root directory start cluster */ 124 u_int8_t bpbFSInfo[2]; /* file system info sector */ 125 u_int8_t bpbBackup[2]; /* backup boot sector */ 126 u_int8_t bpbReserved[12]; /* reserved */ 127 } __packed; 128 129 struct bsx { 130 u_int8_t exDriveNumber; /* drive number */ 131 u_int8_t exReserved1; /* reserved */ 132 u_int8_t exBootSignature; /* extended boot signature */ 133 u_int8_t exVolumeID[4]; /* volume ID number */ 134 u_int8_t exVolumeLabel[11]; /* volume label */ 135 u_int8_t exFileSysType[8]; /* file system type */ 136 } __packed; 137 138 struct de { 139 u_int8_t deName[11]; /* name and extension */ 140 u_int8_t deAttributes; /* attributes */ 141 u_int8_t rsvd[10]; /* reserved */ 142 u_int8_t deMTime[2]; /* last-modified time */ 143 u_int8_t deMDate[2]; /* last-modified date */ 144 u_int8_t deStartCluster[2]; /* starting cluster */ 145 u_int8_t deFileSize[4]; /* size */ 146 } __packed; 147 148 struct bpb { 149 u_int bpbBytesPerSec; /* bytes per sector */ 150 u_int bpbSecPerClust; /* sectors per cluster */ 151 u_int bpbResSectors; /* reserved sectors */ 152 u_int bpbFATs; /* number of FATs */ 153 u_int bpbRootDirEnts; /* root directory entries */ 154 u_int bpbSectors; /* total sectors */ 155 u_int bpbMedia; /* media descriptor */ 156 u_int bpbFATsecs; /* sectors per FAT */ 157 u_int bpbSecPerTrack; /* sectors per track */ 158 u_int bpbHeads; /* drive heads */ 159 u_int bpbHiddenSecs; /* hidden sectors */ 160 u_int bpbHugeSectors; /* big total sectors */ 161 u_int bpbBigFATsecs; /* big sectors per FAT */ 162 u_int bpbRootClust; /* root directory start cluster */ 163 u_int bpbFSInfo; /* file system info sector */ 164 u_int bpbBackup; /* backup boot sector */ 165 }; 166 167 #define BPBGAP 0, 0, 0, 0, 0, 0 168 169 static struct { 170 const char *name; 171 struct bpb bpb; 172 } const stdfmt[] = { 173 {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}}, 174 {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}}, 175 {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}}, 176 {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}}, 177 {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}}, 178 {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}}, 179 {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}}, 180 {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}}, 181 {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}}, 182 {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}} 183 }; 184 185 static const u_int8_t bootcode[] = { 186 0xfa, /* cli */ 187 0x31, 0xc0, /* xor ax,ax */ 188 0x8e, 0xd0, /* mov ss,ax */ 189 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ 190 0xfb, /* sti */ 191 0x8e, 0xd8, /* mov ds,ax */ 192 0xe8, 0x00, 0x00, /* call $ + 3 */ 193 0x5e, /* pop si */ 194 0x83, 0xc6, 0x19, /* add si,+19h */ 195 0xbb, 0x07, 0x00, /* mov bx,0007h */ 196 0xfc, /* cld */ 197 0xac, /* lodsb */ 198 0x84, 0xc0, /* test al,al */ 199 0x74, 0x06, /* jz $ + 8 */ 200 0xb4, 0x0e, /* mov ah,0eh */ 201 0xcd, 0x10, /* int 10h */ 202 0xeb, 0xf5, /* jmp $ - 9 */ 203 0x30, 0xe4, /* xor ah,ah */ 204 0xcd, 0x16, /* int 16h */ 205 0xcd, 0x19, /* int 19h */ 206 0x0d, 0x0a, 207 'N', 'o', 'n', '-', 's', 'y', 's', 't', 208 'e', 'm', ' ', 'd', 'i', 's', 'k', 209 0x0d, 0x0a, 210 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', 211 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', 212 ' ', 'r', 'e', 'b', 'o', 'o', 't', 213 0x0d, 0x0a, 214 0 215 }; 216 217 struct msdos_options { 218 const char *bootstrap; 219 const char *volume_label; 220 const char *OEM_string; 221 const char *floppy; 222 u_int fat_type; 223 u_int volume_id; 224 u_int bytes_per_sector; 225 u_int sectors_per_fat; 226 u_int block_size; 227 u_int sectors_per_cluster; 228 u_int directory_entries; 229 u_int drive_heads; 230 u_int info_sector; 231 u_int backup_sector; 232 u_int media_descriptor; 233 u_int num_FAT; 234 u_int hidden_sectors; 235 u_int reserved_sectors; 236 u_int size; 237 u_int sectors_per_track; 238 int no_create; 239 off_t create_size; 240 off_t offset; 241 int volume_id_set; 242 int media_descriptor_set; 243 int hidden_sectors_set; 244 }; 245 246 static volatile sig_atomic_t got_siginfo; 247 static void infohandler(int); 248 249 static void check_mounted(const char *, mode_t); 250 static void getstdfmt(const char *, struct bpb *); 251 static void getdiskinfo(int, const char *, const char *, int, 252 struct bpb *); 253 static void print_bpb(struct bpb *); 254 static u_int ckgeom(const char *, u_int, const char *); 255 static u_int argtou(const char *, u_int, u_int, const char *); 256 static off_t argtooff(const char *, const char *); 257 static int oklabel(const char *); 258 static int mkfs_msdos(const char *, const char *, const struct msdos_options *); 259 static void mklabel(u_int8_t *, const char *); 260 static void setstr(u_int8_t *, const char *, size_t); 261 static void usage(void); 262 263 /* 264 * Construct a FAT12, FAT16, or FAT32 file system. 265 */ 266 int 267 main(int argc, char *argv[]) 268 { 269 static const char opts[] = "@:NB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:"; 270 struct msdos_options o; 271 const char *fname, *dtype; 272 char buf[MAXPATHLEN]; 273 int ch; 274 275 memset(&o, 0, sizeof(o)); 276 277 while ((ch = getopt(argc, argv, opts)) != -1) 278 switch (ch) { 279 case '@': 280 o.offset = argtooff(optarg, "offset"); 281 break; 282 case 'N': 283 o.no_create = 1; 284 break; 285 case 'B': 286 o.bootstrap = optarg; 287 break; 288 case 'C': 289 o.create_size = argtooff(optarg, "create size"); 290 break; 291 case 'F': 292 if (strcmp(optarg, "12") && 293 strcmp(optarg, "16") && 294 strcmp(optarg, "32")) 295 errx(1, "%s: bad FAT type", optarg); 296 o.fat_type = atoi(optarg); 297 break; 298 case 'I': 299 o.volume_id = argto4(optarg, 0, "volume ID"); 300 o.volume_id_set = 1; 301 break; 302 case 'L': 303 if (!oklabel(optarg)) 304 errx(1, "%s: bad volume label", optarg); 305 o.volume_label = optarg; 306 break; 307 case 'O': 308 if (strlen(optarg) > 8) 309 errx(1, "%s: bad OEM string", optarg); 310 o.OEM_string = optarg; 311 break; 312 case 'S': 313 o.bytes_per_sector = argto2(optarg, 1, "bytes/sector"); 314 break; 315 case 'a': 316 o.sectors_per_fat = argto4(optarg, 1, "sectors/FAT"); 317 break; 318 case 'b': 319 o.block_size = argtox(optarg, 1, "block size"); 320 o.sectors_per_cluster = 0; 321 break; 322 case 'c': 323 o.sectors_per_cluster = argto1(optarg, 1, "sectors/cluster"); 324 o.block_size = 0; 325 break; 326 case 'e': 327 o.directory_entries = argto2(optarg, 1, "directory entries"); 328 break; 329 case 'f': 330 o.floppy = optarg; 331 break; 332 case 'h': 333 o.drive_heads = argto2(optarg, 1, "drive heads"); 334 break; 335 case 'i': 336 o.info_sector = argto2(optarg, 1, "info sector"); 337 break; 338 case 'k': 339 o.backup_sector = argto2(optarg, 1, "backup sector"); 340 break; 341 case 'm': 342 o.media_descriptor = argto1(optarg, 0, "media descriptor"); 343 o.media_descriptor_set = 1; 344 break; 345 case 'n': 346 o.num_FAT = argto1(optarg, 1, "number of FATs"); 347 break; 348 case 'o': 349 o.hidden_sectors = argto4(optarg, 0, "hidden sectors"); 350 o.hidden_sectors_set = 1; 351 break; 352 case 'r': 353 o.reserved_sectors = argto2(optarg, 1, "reserved sectors"); 354 break; 355 case 's': 356 o.size = argto4(optarg, 1, "file system size"); 357 break; 358 case 'u': 359 o.sectors_per_track = argto2(optarg, 1, "sectors/track"); 360 break; 361 default: 362 usage(); 363 } 364 argc -= optind; 365 argv += optind; 366 if (argc < 1 || argc > 2) 367 usage(); 368 fname = *argv++; 369 if (!o.create_size && !strchr(fname, '/')) { 370 snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname); 371 if (!(fname = strdup(buf))) 372 err(1, NULL); 373 } 374 dtype = *argv; 375 return mkfs_msdos(fname, dtype, &o); 376 } 377 378 int mkfs_msdos(const char *fname, const char *dtype, 379 const struct msdos_options *op) 380 { 381 char buf[MAXPATHLEN]; 382 struct sigaction si_sa; 383 struct stat sb; 384 struct timeval tv; 385 struct bpb bpb; 386 struct tm *tm; 387 struct bs *bs; 388 struct bsbpb *bsbpb; 389 struct bsxbpb *bsxbpb; 390 struct bsx *bsx; 391 struct de *de; 392 u_int8_t *img; 393 const char *bname; 394 ssize_t n; 395 time_t now; 396 u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; 397 int fd, fd1; 398 struct msdos_options o = *op; 399 400 if (o.create_size) { 401 if (o.no_create) 402 errx(1, "create (-C) is incompatible with -N"); 403 fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); 404 if (fd == -1) 405 errx(1, "failed to create %s", fname); 406 if (ftruncate(fd, o.create_size)) 407 errx(1, "failed to initialize %jd bytes", (intmax_t)o.create_size); 408 } else if ((fd = open(fname, o.no_create ? O_RDONLY : O_RDWR)) == -1) 409 err(1, "%s", fname); 410 if (fstat(fd, &sb)) 411 err(1, "%s", fname); 412 if (o.create_size) { 413 if (!S_ISREG(sb.st_mode)) 414 warnx("warning, %s is not a regular file", fname); 415 } else { 416 if (!S_ISCHR(sb.st_mode)) 417 warnx("warning, %s is not a character device", fname); 418 } 419 if (!o.no_create) 420 check_mounted(fname, sb.st_mode); 421 if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) 422 errx(1, "cannot seek to %jd", (intmax_t)o.offset); 423 memset(&bpb, 0, sizeof(bpb)); 424 if (o.floppy) { 425 getstdfmt(o.floppy, &bpb); 426 bpb.bpbHugeSectors = bpb.bpbSectors; 427 bpb.bpbSectors = 0; 428 bpb.bpbBigFATsecs = bpb.bpbFATsecs; 429 bpb.bpbFATsecs = 0; 430 } 431 if (o.drive_heads) 432 bpb.bpbHeads = o.drive_heads; 433 if (o.sectors_per_track) 434 bpb.bpbSecPerTrack = o.sectors_per_track; 435 if (o.bytes_per_sector) 436 bpb.bpbBytesPerSec = o.bytes_per_sector; 437 if (o.size) 438 bpb.bpbHugeSectors = o.size; 439 if (o.hidden_sectors_set) 440 bpb.bpbHiddenSecs = o.hidden_sectors; 441 if (!(o.floppy || (o.drive_heads && o.sectors_per_track && o.bytes_per_sector && o.size && o.hidden_sectors_set))) { 442 off_t delta; 443 getdiskinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb); 444 bpb.bpbHugeSectors -= (o.offset / bpb.bpbBytesPerSec); 445 delta = bpb.bpbHugeSectors % bpb.bpbSecPerTrack; 446 if (delta != 0) { 447 warnx("trim %d sectors to adjust to a multiple of %d", 448 (int)delta, bpb.bpbSecPerTrack); 449 bpb.bpbHugeSectors -= delta; 450 } 451 if (bpb.bpbSecPerClust == 0) { /* set defaults */ 452 if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */ 453 bpb.bpbSecPerClust = 1; 454 else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */ 455 bpb.bpbSecPerClust = 8; 456 else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */ 457 bpb.bpbSecPerClust = 16; 458 else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */ 459 bpb.bpbSecPerClust = 32; 460 else 461 bpb.bpbSecPerClust = 64; /* otherwise 32k */ 462 } 463 } 464 if (!powerof2(bpb.bpbBytesPerSec)) 465 errx(1, "bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec); 466 if (bpb.bpbBytesPerSec < MINBPS) 467 errx(1, "bytes/sector (%u) is too small; minimum is %u", 468 bpb.bpbBytesPerSec, MINBPS); 469 if (!(fat = o.fat_type)) { 470 if (o.floppy) 471 fat = 12; 472 else if (!o.directory_entries && (o.info_sector || o.backup_sector)) 473 fat = 32; 474 } 475 if ((fat == 32 && o.directory_entries) || (fat != 32 && (o.info_sector || o.backup_sector))) 476 errx(1, "-%c is not a legal FAT%s option", 477 fat == 32 ? 'e' : o.info_sector ? 'i' : 'k', 478 fat == 32 ? "32" : "12/16"); 479 if (o.floppy && fat == 32) 480 bpb.bpbRootDirEnts = 0; 481 if (o.block_size) { 482 if (!powerof2(o.block_size)) 483 errx(1, "block size (%u) is not a power of 2", o.block_size); 484 if (o.block_size < bpb.bpbBytesPerSec) 485 errx(1, "block size (%u) is too small; minimum is %u", 486 o.block_size, bpb.bpbBytesPerSec); 487 if (o.block_size > bpb.bpbBytesPerSec * MAXSPC) 488 errx(1, "block size (%u) is too large; maximum is %u", 489 o.block_size, bpb.bpbBytesPerSec * MAXSPC); 490 bpb.bpbSecPerClust = o.block_size / bpb.bpbBytesPerSec; 491 } 492 if (o.sectors_per_cluster) { 493 if (!powerof2(o.sectors_per_cluster)) 494 errx(1, "sectors/cluster (%u) is not a power of 2", o.sectors_per_cluster); 495 bpb.bpbSecPerClust = o.sectors_per_cluster; 496 } 497 if (o.reserved_sectors) 498 bpb.bpbResSectors = o.reserved_sectors; 499 if (o.num_FAT) { 500 if (o.num_FAT > MAXNFT) 501 errx(1, "number of FATs (%u) is too large; maximum is %u", 502 o.num_FAT, MAXNFT); 503 bpb.bpbFATs = o.num_FAT; 504 } 505 if (o.directory_entries) 506 bpb.bpbRootDirEnts = o.directory_entries; 507 if (o.media_descriptor_set) { 508 if (o.media_descriptor < 0xf0) 509 errx(1, "illegal media descriptor (%#x)", o.media_descriptor); 510 bpb.bpbMedia = o.media_descriptor; 511 } 512 if (o.sectors_per_fat) 513 bpb.bpbBigFATsecs = o.sectors_per_fat; 514 if (o.info_sector) 515 bpb.bpbFSInfo = o.info_sector; 516 if (o.backup_sector) 517 bpb.bpbBackup = o.backup_sector; 518 bss = 1; 519 bname = NULL; 520 fd1 = -1; 521 if (o.bootstrap) { 522 bname = o.bootstrap; 523 if (!strchr(bname, '/')) { 524 snprintf(buf, sizeof(buf), "/boot/%s", bname); 525 if (!(bname = strdup(buf))) 526 err(1, NULL); 527 } 528 if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) 529 err(1, "%s", bname); 530 if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bpbBytesPerSec || 531 sb.st_size < bpb.bpbBytesPerSec || 532 sb.st_size > bpb.bpbBytesPerSec * MAXU16) 533 errx(1, "%s: inappropriate file type or format", bname); 534 bss = sb.st_size / bpb.bpbBytesPerSec; 535 } 536 if (!bpb.bpbFATs) 537 bpb.bpbFATs = 2; 538 if (!fat) { 539 if (bpb.bpbHugeSectors < (bpb.bpbResSectors ? bpb.bpbResSectors : bss) + 540 howmany((RESFTE + (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1)) * 541 (bpb.bpbSecPerClust ? 16 : 12) / BPN, 542 bpb.bpbBytesPerSec * NPB) * 543 bpb.bpbFATs + 544 howmany(bpb.bpbRootDirEnts ? bpb.bpbRootDirEnts : DEFRDE, 545 bpb.bpbBytesPerSec / sizeof(struct de)) + 546 (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1) * 547 (bpb.bpbSecPerClust ? bpb.bpbSecPerClust : 548 howmany(DEFBLK, bpb.bpbBytesPerSec))) 549 fat = 12; 550 else if (bpb.bpbRootDirEnts || bpb.bpbHugeSectors < 551 (bpb.bpbResSectors ? bpb.bpbResSectors : bss) + 552 howmany((RESFTE + MAXCLS16) * 2, bpb.bpbBytesPerSec) * 553 bpb.bpbFATs + 554 howmany(DEFRDE, bpb.bpbBytesPerSec / sizeof(struct de)) + 555 (MAXCLS16 + 1) * 556 (bpb.bpbSecPerClust ? bpb.bpbSecPerClust : 557 howmany(8192, bpb.bpbBytesPerSec))) 558 fat = 16; 559 else 560 fat = 32; 561 } 562 x = bss; 563 if (fat == 32) { 564 if (!bpb.bpbFSInfo) { 565 if (x == MAXU16 || x == bpb.bpbBackup) 566 errx(1, "no room for info sector"); 567 bpb.bpbFSInfo = x; 568 } 569 if (bpb.bpbFSInfo != MAXU16 && x <= bpb.bpbFSInfo) 570 x = bpb.bpbFSInfo + 1; 571 if (!bpb.bpbBackup) { 572 if (x == MAXU16) 573 errx(1, "no room for backup sector"); 574 bpb.bpbBackup = x; 575 } else if (bpb.bpbBackup != MAXU16 && bpb.bpbBackup == bpb.bpbFSInfo) 576 errx(1, "backup sector would overwrite info sector"); 577 if (bpb.bpbBackup != MAXU16 && x <= bpb.bpbBackup) 578 x = bpb.bpbBackup + 1; 579 } 580 if (!bpb.bpbResSectors) 581 bpb.bpbResSectors = fat == 32 ? 582 MAX(x, MAX(16384 / bpb.bpbBytesPerSec, 4)) : x; 583 else if (bpb.bpbResSectors < x) 584 errx(1, "too few reserved sectors (need %d have %d)", x, 585 bpb.bpbResSectors); 586 if (fat != 32 && !bpb.bpbRootDirEnts) 587 bpb.bpbRootDirEnts = DEFRDE; 588 rds = howmany(bpb.bpbRootDirEnts, bpb.bpbBytesPerSec / sizeof(struct de)); 589 if (!bpb.bpbSecPerClust) 590 for (bpb.bpbSecPerClust = howmany(fat == 16 ? DEFBLK16 : 591 DEFBLK, bpb.bpbBytesPerSec); 592 bpb.bpbSecPerClust < MAXSPC && 593 bpb.bpbResSectors + 594 howmany((RESFTE + maxcls(fat)) * (fat / BPN), 595 bpb.bpbBytesPerSec * NPB) * 596 bpb.bpbFATs + 597 rds + 598 (u_int64_t) (maxcls(fat) + 1) * 599 bpb.bpbSecPerClust <= bpb.bpbHugeSectors; 600 bpb.bpbSecPerClust <<= 1) 601 continue; 602 if (fat != 32 && bpb.bpbBigFATsecs > MAXU16) 603 errx(1, "too many sectors/FAT for FAT12/16"); 604 x1 = bpb.bpbResSectors + rds; 605 x = bpb.bpbBigFATsecs ? bpb.bpbBigFATsecs : 1; 606 if (x1 + (u_int64_t)x * bpb.bpbFATs > bpb.bpbHugeSectors) 607 errx(1, "meta data exceeds file system size"); 608 x1 += x * bpb.bpbFATs; 609 x = (u_int64_t)(bpb.bpbHugeSectors - x1) * bpb.bpbBytesPerSec * NPB / 610 (bpb.bpbSecPerClust * bpb.bpbBytesPerSec * NPB + fat / 611 BPN * bpb.bpbFATs); 612 x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), 613 bpb.bpbBytesPerSec * NPB); 614 if (!bpb.bpbBigFATsecs) { 615 bpb.bpbBigFATsecs = x2; 616 x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs; 617 } 618 cls = (bpb.bpbHugeSectors - x1) / bpb.bpbSecPerClust; 619 x = (u_int64_t)bpb.bpbBigFATsecs * bpb.bpbBytesPerSec * NPB / (fat / BPN) - 620 RESFTE; 621 if (cls > x) 622 cls = x; 623 if (bpb.bpbBigFATsecs < x2) 624 warnx("warning: sectors/FAT limits file system to %u clusters", 625 cls); 626 if (cls < mincls(fat)) 627 errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, 628 mincls(fat)); 629 if (cls > maxcls(fat)) { 630 cls = maxcls(fat); 631 bpb.bpbHugeSectors = x1 + (cls + 1) * bpb.bpbSecPerClust - 1; 632 warnx("warning: FAT type limits file system to %u sectors", 633 bpb.bpbHugeSectors); 634 } 635 printf("%s: %u sector%s in %u FAT%u cluster%s " 636 "(%u bytes/cluster)\n", fname, cls * bpb.bpbSecPerClust, 637 cls * bpb.bpbSecPerClust == 1 ? "" : "s", cls, fat, 638 cls == 1 ? "" : "s", bpb.bpbBytesPerSec * bpb.bpbSecPerClust); 639 if (!bpb.bpbMedia) 640 bpb.bpbMedia = !bpb.bpbHiddenSecs ? 0xf0 : 0xf8; 641 if (fat == 32) 642 bpb.bpbRootClust = RESFTE; 643 if (bpb.bpbHiddenSecs + bpb.bpbHugeSectors <= MAXU16) { 644 bpb.bpbSectors = bpb.bpbHugeSectors; 645 bpb.bpbHugeSectors = 0; 646 } 647 if (fat != 32) { 648 bpb.bpbFATsecs = bpb.bpbBigFATsecs; 649 bpb.bpbBigFATsecs = 0; 650 } 651 print_bpb(&bpb); 652 if (!o.no_create) { 653 gettimeofday(&tv, NULL); 654 now = tv.tv_sec; 655 tm = localtime(&now); 656 if (!(img = malloc(bpb.bpbBytesPerSec))) 657 err(1, NULL); 658 dir = bpb.bpbResSectors + (bpb.bpbFATsecs ? bpb.bpbFATsecs : 659 bpb.bpbBigFATsecs) * bpb.bpbFATs; 660 memset(&si_sa, 0, sizeof(si_sa)); 661 si_sa.sa_handler = infohandler; 662 if (sigaction(SIGINFO, &si_sa, NULL) == -1) 663 err(1, "sigaction SIGINFO"); 664 for (lsn = 0; lsn < dir + (fat == 32 ? bpb.bpbSecPerClust : rds); lsn++) { 665 if (got_siginfo) { 666 fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n", 667 fname, lsn, 668 (dir + (fat == 32 ? bpb.bpbSecPerClust: rds)), 669 (lsn * 100) / (dir + 670 (fat == 32 ? bpb.bpbSecPerClust: rds))); 671 got_siginfo = 0; 672 } 673 x = lsn; 674 if (o.bootstrap && 675 fat == 32 && bpb.bpbBackup != MAXU16 && 676 bss <= bpb.bpbBackup && x >= bpb.bpbBackup) { 677 x -= bpb.bpbBackup; 678 if (!x && lseek(fd1, o.offset, SEEK_SET)) 679 err(1, "%s", bname); 680 } 681 if (o.bootstrap && x < bss) { 682 if ((n = read(fd1, img, bpb.bpbBytesPerSec)) == -1) 683 err(1, "%s", bname); 684 if ((unsigned)n != bpb.bpbBytesPerSec) 685 errx(1, "%s: can't read sector %u", bname, x); 686 } else 687 memset(img, 0, bpb.bpbBytesPerSec); 688 if (!lsn || 689 (fat == 32 && bpb.bpbBackup != MAXU16 && 690 lsn == bpb.bpbBackup)) { 691 x1 = sizeof(struct bs); 692 bsbpb = (struct bsbpb *)(img + x1); 693 mk2(bsbpb->bpbBytesPerSec, bpb.bpbBytesPerSec); 694 mk1(bsbpb->bpbSecPerClust, bpb.bpbSecPerClust); 695 mk2(bsbpb->bpbResSectors, bpb.bpbResSectors); 696 mk1(bsbpb->bpbFATs, bpb.bpbFATs); 697 mk2(bsbpb->bpbRootDirEnts, bpb.bpbRootDirEnts); 698 mk2(bsbpb->bpbSectors, bpb.bpbSectors); 699 mk1(bsbpb->bpbMedia, bpb.bpbMedia); 700 mk2(bsbpb->bpbFATsecs, bpb.bpbFATsecs); 701 mk2(bsbpb->bpbSecPerTrack, bpb.bpbSecPerTrack); 702 mk2(bsbpb->bpbHeads, bpb.bpbHeads); 703 mk4(bsbpb->bpbHiddenSecs, bpb.bpbHiddenSecs); 704 mk4(bsbpb->bpbHugeSectors, bpb.bpbHugeSectors); 705 x1 += sizeof(struct bsbpb); 706 if (fat == 32) { 707 bsxbpb = (struct bsxbpb *)(img + x1); 708 mk4(bsxbpb->bpbBigFATsecs, bpb.bpbBigFATsecs); 709 mk2(bsxbpb->bpbExtFlags, 0); 710 mk2(bsxbpb->bpbFSVers, 0); 711 mk4(bsxbpb->bpbRootClust, bpb.bpbRootClust); 712 mk2(bsxbpb->bpbFSInfo, bpb.bpbFSInfo); 713 mk2(bsxbpb->bpbBackup, bpb.bpbBackup); 714 x1 += sizeof(struct bsxbpb); 715 } 716 bsx = (struct bsx *)(img + x1); 717 mk1(bsx->exBootSignature, 0x29); 718 if (o.volume_id_set) 719 x = o.volume_id; 720 else 721 x = (((u_int)(1 + tm->tm_mon) << 8 | 722 (u_int)tm->tm_mday) + 723 ((u_int)tm->tm_sec << 8 | 724 (u_int)(tv.tv_usec / 10))) << 16 | 725 ((u_int)(1900 + tm->tm_year) + 726 ((u_int)tm->tm_hour << 8 | 727 (u_int)tm->tm_min)); 728 mk4(bsx->exVolumeID, x); 729 mklabel(bsx->exVolumeLabel, o.volume_label ? o.volume_label : "NO NAME"); 730 sprintf(buf, "FAT%u", fat); 731 setstr(bsx->exFileSysType, buf, sizeof(bsx->exFileSysType)); 732 if (!o.bootstrap) { 733 x1 += sizeof(struct bsx); 734 bs = (struct bs *)img; 735 mk1(bs->bsJump[0], 0xeb); 736 mk1(bs->bsJump[1], x1 - 2); 737 mk1(bs->bsJump[2], 0x90); 738 setstr(bs->bsOemName, o.OEM_string ? o.OEM_string : "BSD4.4 ", 739 sizeof(bs->bsOemName)); 740 memcpy(img + x1, bootcode, sizeof(bootcode)); 741 mk2(img + MINBPS - 2, DOSMAGIC); 742 } 743 } else if (fat == 32 && bpb.bpbFSInfo != MAXU16 && 744 (lsn == bpb.bpbFSInfo || 745 (bpb.bpbBackup != MAXU16 && 746 lsn == bpb.bpbBackup + bpb.bpbFSInfo))) { 747 mk4(img, 0x41615252); 748 mk4(img + MINBPS - 28, 0x61417272); 749 mk4(img + MINBPS - 24, 0xffffffff); 750 mk4(img + MINBPS - 20, bpb.bpbRootClust); 751 mk2(img + MINBPS - 2, DOSMAGIC); 752 } else if (lsn >= bpb.bpbResSectors && lsn < dir && 753 !((lsn - bpb.bpbResSectors) % 754 (bpb.bpbFATsecs ? bpb.bpbFATsecs : 755 bpb.bpbBigFATsecs))) { 756 mk1(img[0], bpb.bpbMedia); 757 for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) 758 mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); 759 } else if (lsn == dir && o.volume_label) { 760 de = (struct de *)img; 761 mklabel(de->deName, o.volume_label); 762 mk1(de->deAttributes, 050); 763 x = (u_int)tm->tm_hour << 11 | 764 (u_int)tm->tm_min << 5 | 765 (u_int)tm->tm_sec >> 1; 766 mk2(de->deMTime, x); 767 x = (u_int)(tm->tm_year - 80) << 9 | 768 (u_int)(tm->tm_mon + 1) << 5 | 769 (u_int)tm->tm_mday; 770 mk2(de->deMDate, x); 771 } 772 if ((n = write(fd, img, bpb.bpbBytesPerSec)) == -1) 773 err(1, "%s", fname); 774 if ((unsigned)n != bpb.bpbBytesPerSec) 775 errx(1, "%s: can't write sector %u", fname, lsn); 776 } 777 } 778 return 0; 779 } 780 781 /* 782 * Exit with error if file system is mounted. 783 */ 784 static void 785 check_mounted(const char *fname, mode_t mode) 786 { 787 struct statfs *mp; 788 const char *s1, *s2; 789 size_t len; 790 int n, r; 791 792 if (!(n = getmntinfo(&mp, MNT_NOWAIT))) 793 err(1, "getmntinfo"); 794 len = strlen(_PATH_DEV); 795 s1 = fname; 796 if (!strncmp(s1, _PATH_DEV, len)) 797 s1 += len; 798 r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; 799 for (; n--; mp++) { 800 s2 = mp->f_mntfromname; 801 if (!strncmp(s2, _PATH_DEV, len)) 802 s2 += len; 803 if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || 804 !strcmp(s1, s2)) 805 errx(1, "%s is mounted on %s", fname, mp->f_mntonname); 806 } 807 } 808 809 /* 810 * Get a standard format. 811 */ 812 static void 813 getstdfmt(const char *fmt, struct bpb *bpb) 814 { 815 u_int x, i; 816 817 x = sizeof(stdfmt) / sizeof(stdfmt[0]); 818 for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); 819 if (i == x) 820 errx(1, "%s: unknown standard format", fmt); 821 *bpb = stdfmt[i].bpb; 822 } 823 824 /* 825 * Get disk slice, partition, and geometry information. 826 */ 827 static void 828 getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag, 829 struct bpb *bpb) 830 { 831 struct disklabel *lp, dlp; 832 struct fd_type type; 833 off_t ms, hs = 0; 834 835 lp = NULL; 836 837 /* If the user specified a disk type, try to use that */ 838 if (dtype != NULL) { 839 lp = getdiskbyname(dtype); 840 } 841 842 /* Maybe it's a floppy drive */ 843 if (lp == NULL) { 844 if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) { 845 struct stat st; 846 847 if (fstat(fd, &st)) 848 err(1, "cannot get disk size"); 849 /* create a fake geometry for a file image */ 850 ms = st.st_size; 851 dlp.d_secsize = 512; 852 dlp.d_nsectors = 63; 853 dlp.d_ntracks = 255; 854 dlp.d_secperunit = ms / dlp.d_secsize; 855 lp = &dlp; 856 } else if (ioctl(fd, FD_GTYPE, &type) != -1) { 857 dlp.d_secsize = 128 << type.secsize; 858 dlp.d_nsectors = type.sectrac; 859 dlp.d_ntracks = type.heads; 860 dlp.d_secperunit = ms / dlp.d_secsize; 861 lp = &dlp; 862 } 863 } 864 865 /* Maybe it's a fixed drive */ 866 if (lp == NULL) { 867 if (bpb->bpbBytesPerSec) 868 dlp.d_secsize = bpb->bpbBytesPerSec; 869 if (bpb->bpbBytesPerSec == 0 && ioctl(fd, DIOCGSECTORSIZE, 870 &dlp.d_secsize) == -1) 871 err(1, "cannot get sector size"); 872 873 dlp.d_secperunit = ms / dlp.d_secsize; 874 875 if (bpb->bpbSecPerTrack == 0 && ioctl(fd, DIOCGFWSECTORS, 876 &dlp.d_nsectors) == -1) { 877 warn("cannot get number of sectors per track"); 878 dlp.d_nsectors = 63; 879 } 880 if (bpb->bpbHeads == 0 && 881 ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) { 882 warn("cannot get number of heads"); 883 if (dlp.d_secperunit <= 63*1*1024) 884 dlp.d_ntracks = 1; 885 else if (dlp.d_secperunit <= 63*16*1024) 886 dlp.d_ntracks = 16; 887 else 888 dlp.d_ntracks = 255; 889 } 890 891 hs = (ms / dlp.d_secsize) - dlp.d_secperunit; 892 lp = &dlp; 893 } 894 895 if (bpb->bpbBytesPerSec == 0) 896 bpb->bpbBytesPerSec = ckgeom(fname, lp->d_secsize, "bytes/sector"); 897 if (bpb->bpbSecPerTrack == 0) 898 bpb->bpbSecPerTrack = ckgeom(fname, lp->d_nsectors, "sectors/track"); 899 if (bpb->bpbHeads == 0) 900 bpb->bpbHeads = ckgeom(fname, lp->d_ntracks, "drive heads"); 901 if (bpb->bpbHugeSectors == 0) 902 bpb->bpbHugeSectors = lp->d_secperunit; 903 if (bpb->bpbHiddenSecs == 0) 904 bpb->bpbHiddenSecs = hs; 905 } 906 907 /* 908 * Print out BPB values. 909 */ 910 static void 911 print_bpb(struct bpb *bpb) 912 { 913 printf("BytesPerSec=%u SecPerClust=%u ResSectors=%u FATs=%u", 914 bpb->bpbBytesPerSec, bpb->bpbSecPerClust, bpb->bpbResSectors, 915 bpb->bpbFATs); 916 if (bpb->bpbRootDirEnts) 917 printf(" RootDirEnts=%u", bpb->bpbRootDirEnts); 918 if (bpb->bpbSectors) 919 printf(" Sectors=%u", bpb->bpbSectors); 920 printf(" Media=%#x", bpb->bpbMedia); 921 if (bpb->bpbFATsecs) 922 printf(" FATsecs=%u", bpb->bpbFATsecs); 923 printf(" SecPerTrack=%u Heads=%u HiddenSecs=%u", bpb->bpbSecPerTrack, 924 bpb->bpbHeads, bpb->bpbHiddenSecs); 925 if (bpb->bpbHugeSectors) 926 printf(" HugeSectors=%u", bpb->bpbHugeSectors); 927 if (!bpb->bpbFATsecs) { 928 printf(" FATsecs=%u RootCluster=%u", bpb->bpbBigFATsecs, 929 bpb->bpbRootClust); 930 printf(" FSInfo="); 931 printf(bpb->bpbFSInfo == MAXU16 ? "%#x" : "%u", bpb->bpbFSInfo); 932 printf(" Backup="); 933 printf(bpb->bpbBackup == MAXU16 ? "%#x" : "%u", bpb->bpbBackup); 934 } 935 printf("\n"); 936 } 937 938 /* 939 * Check a disk geometry value. 940 */ 941 static u_int 942 ckgeom(const char *fname, u_int val, const char *msg) 943 { 944 if (!val) 945 errx(1, "%s: no default %s", fname, msg); 946 if (val > MAXU16) 947 errx(1, "%s: illegal %s %d", fname, msg, val); 948 return val; 949 } 950 951 /* 952 * Convert and check a numeric option argument. 953 */ 954 static u_int 955 argtou(const char *arg, u_int lo, u_int hi, const char *msg) 956 { 957 char *s; 958 u_long x; 959 960 errno = 0; 961 x = strtoul(arg, &s, 0); 962 if (errno || !*arg || *s || x < lo || x > hi) 963 errx(1, "%s: bad %s", arg, msg); 964 return x; 965 } 966 967 /* 968 * Same for off_t, with optional skmgpP suffix 969 */ 970 static off_t 971 argtooff(const char *arg, const char *msg) 972 { 973 char *s; 974 off_t x; 975 976 errno = 0; 977 x = strtoll(arg, &s, 0); 978 /* allow at most one extra char */ 979 if (errno || x < 0 || (s[0] && s[1]) ) 980 errx(1, "%s: bad %s", arg, msg); 981 if (*s) { /* the extra char is the multiplier */ 982 switch (*s) { 983 default: 984 errx(1, "%s: bad %s", arg, msg); 985 /* notreached */ 986 987 case 's': /* sector */ 988 case 'S': 989 x <<= 9; /* times 512 */ 990 break; 991 992 case 'k': /* kilobyte */ 993 case 'K': 994 x <<= 10; /* times 1024 */ 995 break; 996 997 case 'm': /* megabyte */ 998 case 'M': 999 x <<= 20; /* times 1024*1024 */ 1000 break; 1001 1002 case 'g': /* gigabyte */ 1003 case 'G': 1004 x <<= 30; /* times 1024*1024*1024 */ 1005 break; 1006 1007 case 'p': /* partition start */ 1008 case 'P': 1009 case 'l': /* partition length */ 1010 case 'L': 1011 errx(1, "%s: not supported yet %s", arg, msg); 1012 /* notreached */ 1013 } 1014 } 1015 return x; 1016 } 1017 1018 /* 1019 * Check a volume label. 1020 */ 1021 static int 1022 oklabel(const char *src) 1023 { 1024 int c, i; 1025 1026 for (i = 0; i <= 11; i++) { 1027 c = (u_char)*src++; 1028 if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) 1029 break; 1030 } 1031 return i && !c; 1032 } 1033 1034 /* 1035 * Make a volume label. 1036 */ 1037 static void 1038 mklabel(u_int8_t *dest, const char *src) 1039 { 1040 int c, i; 1041 1042 for (i = 0; i < 11; i++) { 1043 c = *src ? toupper(*src++) : ' '; 1044 *dest++ = !i && c == '\xe5' ? 5 : c; 1045 } 1046 } 1047 1048 /* 1049 * Copy string, padding with spaces. 1050 */ 1051 static void 1052 setstr(u_int8_t *dest, const char *src, size_t len) 1053 { 1054 while (len--) 1055 *dest++ = *src ? *src++ : ' '; 1056 } 1057 1058 /* 1059 * Print usage message. 1060 */ 1061 static void 1062 usage(void) 1063 { 1064 fprintf(stderr, 1065 "usage: newfs_msdos [ -options ] special [disktype]\n" 1066 "where the options are:\n" 1067 "\t-@ create file system at specified offset\n" 1068 "\t-B get bootstrap from file\n" 1069 "\t-C create image file with specified size\n" 1070 "\t-F FAT type (12, 16, or 32)\n" 1071 "\t-I volume ID\n" 1072 "\t-L volume label\n" 1073 "\t-N don't create file system: just print out parameters\n" 1074 "\t-O OEM string\n" 1075 "\t-S bytes/sector\n" 1076 "\t-a sectors/FAT\n" 1077 "\t-b block size\n" 1078 "\t-c sectors/cluster\n" 1079 "\t-e root directory entries\n" 1080 "\t-f standard format\n" 1081 "\t-h drive heads\n" 1082 "\t-i file system info sector\n" 1083 "\t-k backup boot sector\n" 1084 "\t-m media descriptor\n" 1085 "\t-n number of FATs\n" 1086 "\t-o hidden sectors\n" 1087 "\t-r reserved sectors\n" 1088 "\t-s file system size (sectors)\n" 1089 "\t-u sectors/track\n"); 1090 exit(1); 1091 } 1092 1093 static void 1094 infohandler(int sig __unused) 1095 { 1096 1097 got_siginfo = 1; 1098 } 1099