setup.c revision 74556
1/* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. 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 the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 37#endif 38static const char rcsid[] = 39 "$FreeBSD: head/sbin/fsck_ffs/setup.c 74556 2001-03-21 09:48:03Z mckusick $"; 40#endif /* not lint */ 41 42#define DKTYPENAMES 43#include <sys/param.h> 44#include <sys/stat.h> 45#include <sys/disklabel.h> 46#include <sys/file.h> 47 48#include <ufs/ufs/dinode.h> 49#include <ufs/ffs/fs.h> 50 51#include <ctype.h> 52#include <err.h> 53#include <errno.h> 54#include <string.h> 55 56#include "fsck.h" 57 58struct bufarea asblk; 59#define altsblock (*asblk.b_un.b_fs) 60#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 61 62static void badsb __P((int listerr, char *s)); 63static int calcsb __P((char *dev, int devfd, struct fs *fs)); 64static struct disklabel *getdisklabel __P((char *s, int fd)); 65static int readsb __P((int listerr)); 66 67/* 68 * Read in a superblock finding an alternate if necessary. 69 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 70 * is already clean (preen mode only). 71 */ 72int 73setup(dev) 74 char *dev; 75{ 76 long cg, size, asked, i, j; 77 long skipclean, bmapsize; 78 struct disklabel *lp; 79 off_t sizepb; 80 struct stat statb; 81 struct fs proto; 82 83 havesb = 0; 84 fswritefd = -1; 85 cursnapshot = 0; 86 skipclean = fflag ? 0 : preen; 87 if (stat(dev, &statb) < 0) { 88 printf("Can't stat %s: %s\n", dev, strerror(errno)); 89 if (bkgrdflag) { 90 unlink(snapname); 91 bkgrdflag = 0; 92 } 93 return (0); 94 } 95 if ((statb.st_mode & S_IFMT) != S_IFCHR && 96 (statb.st_mode & S_IFMT) != S_IFBLK) { 97 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 98 unlink(snapname); 99 printf("background fsck lacks a snapshot\n"); 100 exit(EEXIT); 101 } 102 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 103 cursnapshot = statb.st_ino; 104 } else { 105 if (cvtlevel == 0 || 106 (statb.st_flags & SF_SNAPSHOT) == 0) { 107 if (preen && bkgrdflag) { 108 unlink(snapname); 109 bkgrdflag = 0; 110 } 111 pfatal("%s is not a disk device", dev); 112 if (reply("CONTINUE") == 0) { 113 if (bkgrdflag) { 114 unlink(snapname); 115 bkgrdflag = 0; 116 } 117 return (0); 118 } 119 } else { 120 if (bkgrdflag) { 121 unlink(snapname); 122 bkgrdflag = 0; 123 } 124 pfatal("cannot convert a snapshot"); 125 exit(EEXIT); 126 } 127 } 128 } 129 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 130 if (bkgrdflag) { 131 unlink(snapname); 132 bkgrdflag = 0; 133 } 134 printf("Can't open %s: %s\n", dev, strerror(errno)); 135 return (0); 136 } 137 if (bkgrdflag) { 138 unlink(snapname); 139 size = MIBSIZE; 140 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 141 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 142 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 143 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 144 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 145 pfatal("kernel lacks background fsck support\n"); 146 exit(EEXIT); 147 } 148 cmd.version = FFS_CMD_VERSION; 149 cmd.handle = fsreadfd; 150 fswritefd = -1; 151 } 152 if (preen == 0) 153 printf("** %s", dev); 154 if (bkgrdflag == 0 && 155 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 156 fswritefd = -1; 157 if (preen) 158 pfatal("NO WRITE ACCESS"); 159 printf(" (NO WRITE)"); 160 } 161 if (preen == 0) 162 printf("\n"); 163 fsmodified = 0; 164 lfdir = 0; 165 initbarea(&sblk); 166 initbarea(&asblk); 167 sblk.b_un.b_buf = malloc(SBSIZE); 168 asblk.b_un.b_buf = malloc(SBSIZE); 169 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 170 errx(EEXIT, "cannot allocate space for superblock"); 171 if ((lp = getdisklabel(NULL, fsreadfd))) 172 dev_bsize = secsize = lp->d_secsize; 173 else 174 dev_bsize = secsize = DEV_BSIZE; 175 /* 176 * Read in the superblock, looking for alternates if necessary 177 */ 178 if (readsb(1) == 0) { 179 skipclean = 0; 180 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 181 return(0); 182 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 183 return (0); 184 for (cg = 0; cg < proto.fs_ncg; cg++) { 185 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 186 if (readsb(0) != 0) 187 break; 188 } 189 if (cg >= proto.fs_ncg) { 190 printf("%s %s\n%s %s\n%s %s\n", 191 "SEARCH FOR ALTERNATE SUPER-BLOCK", 192 "FAILED. YOU MUST USE THE", 193 "-b OPTION TO FSCK TO SPECIFY THE", 194 "LOCATION OF AN ALTERNATE", 195 "SUPER-BLOCK TO SUPPLY NEEDED", 196 "INFORMATION; SEE fsck(8)."); 197 bflag = 0; 198 return(0); 199 } 200 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 201 bflag = 0; 202 } 203 if (skipclean && sblock.fs_clean) { 204 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 205 return (-1); 206 } 207 maxfsblock = sblock.fs_size; 208 maxino = sblock.fs_ncg * sblock.fs_ipg; 209 /* 210 * Check and potentially fix certain fields in the super block. 211 */ 212 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 213 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 214 if (reply("SET TO DEFAULT") == 1) { 215 sblock.fs_optim = FS_OPTTIME; 216 sbdirty(); 217 } 218 } 219 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 220 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 221 sblock.fs_minfree); 222 if (reply("SET TO DEFAULT") == 1) { 223 sblock.fs_minfree = 10; 224 sbdirty(); 225 } 226 } 227 if (sblock.fs_interleave < 1 || 228 sblock.fs_interleave > sblock.fs_nsect) { 229 pfatal("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 230 sblock.fs_interleave); 231 sblock.fs_interleave = 1; 232 if (preen) 233 printf(" (FIXED)\n"); 234 if (preen || reply("SET TO DEFAULT") == 1) { 235 sbdirty(); 236 dirty(&asblk); 237 } 238 } 239 if (sblock.fs_npsect < sblock.fs_nsect || 240 sblock.fs_npsect > sblock.fs_nsect*2) { 241 pfatal("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 242 sblock.fs_npsect); 243 sblock.fs_npsect = sblock.fs_nsect; 244 if (preen) 245 printf(" (FIXED)\n"); 246 if (preen || reply("SET TO DEFAULT") == 1) { 247 sbdirty(); 248 dirty(&asblk); 249 } 250 } 251 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 252 newinofmt = 1; 253 } else { 254 sblock.fs_qbmask = ~sblock.fs_bmask; 255 sblock.fs_qfmask = ~sblock.fs_fmask; 256 /* This should match the kernel limit in ffs_oldfscompat(). */ 257 sblock.fs_maxfilesize = (u_int64_t)1 << 39; 258 newinofmt = 0; 259 } 260 /* 261 * Convert to new inode format. 262 */ 263 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 264 if (preen) 265 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 266 else if (!reply("CONVERT TO NEW INODE FORMAT")) 267 return(0); 268 doinglevel2++; 269 sblock.fs_inodefmt = FS_44INODEFMT; 270 sizepb = sblock.fs_bsize; 271 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 272 for (i = 0; i < NIADDR; i++) { 273 sizepb *= NINDIR(&sblock); 274 sblock.fs_maxfilesize += sizepb; 275 } 276 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 277 sblock.fs_qbmask = ~sblock.fs_bmask; 278 sblock.fs_qfmask = ~sblock.fs_fmask; 279 sbdirty(); 280 dirty(&asblk); 281 } 282 /* 283 * Convert to new cylinder group format. 284 */ 285 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 286 if (preen) 287 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 288 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 289 return(0); 290 doinglevel1++; 291 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 292 sblock.fs_nrpos = 8; 293 sblock.fs_postbloff = 294 (char *)(&sblock.fs_opostbl[0][0]) - 295 (char *)(&sblock.fs_firstfield); 296 sblock.fs_rotbloff = &sblock.fs_space[0] - 297 (u_char *)(&sblock.fs_firstfield); 298 sblock.fs_cgsize = 299 fragroundup(&sblock, CGSIZE(&sblock)); 300 sbdirty(); 301 dirty(&asblk); 302 } 303 if (asblk.b_dirty && !bflag) { 304 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 305 flush(fswritefd, &asblk); 306 } 307 /* 308 * read in the summary info. 309 */ 310 asked = 0; 311 sblock.fs_csp = calloc(1, sblock.fs_cssize); 312 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 313 size = sblock.fs_cssize - i < sblock.fs_bsize ? 314 sblock.fs_cssize - i : sblock.fs_bsize; 315 if (bread(fsreadfd, (char *)sblock.fs_csp + i, 316 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 317 size) != 0 && !asked) { 318 pfatal("BAD SUMMARY INFORMATION"); 319 if (reply("CONTINUE") == 0) { 320 ckfini(0); 321 exit(EEXIT); 322 } 323 asked++; 324 } 325 } 326 /* 327 * allocate and initialize the necessary maps 328 */ 329 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 330 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 331 if (blockmap == NULL) { 332 printf("cannot alloc %u bytes for blockmap\n", 333 (unsigned)bmapsize); 334 goto badsb; 335 } 336 inostathead = calloc((unsigned)(sblock.fs_ncg), 337 sizeof(struct inostatlist)); 338 if (inostathead == NULL) { 339 printf("cannot alloc %u bytes for inostathead\n", 340 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 341 goto badsb; 342 } 343 numdirs = sblock.fs_cstotal.cs_ndir; 344 dirhash = numdirs; 345 if (numdirs == 0) { 346 printf("numdirs is zero, try using an alternate superblock\n"); 347 goto badsb; 348 } 349 inplast = 0; 350 listmax = numdirs + 10; 351 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 352 sizeof(struct inoinfo *)); 353 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 354 sizeof(struct inoinfo *)); 355 if (inpsort == NULL || inphead == NULL) { 356 printf("cannot alloc %u bytes for inphead\n", 357 (unsigned)numdirs * sizeof(struct inoinfo *)); 358 goto badsb; 359 } 360 bufinit(); 361 if (sblock.fs_flags & FS_DOSOFTDEP) 362 usedsoftdep = 1; 363 else 364 usedsoftdep = 0; 365 return (1); 366 367badsb: 368 ckfini(0); 369 return (0); 370} 371 372/* 373 * Read in the super block and its summary info. 374 */ 375static int 376readsb(listerr) 377 int listerr; 378{ 379 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 380 381 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 382 return (0); 383 sblk.b_bno = super; 384 sblk.b_size = SBSIZE; 385 /* 386 * run a few consistency checks of the super block 387 */ 388 if (sblock.fs_magic != FS_MAGIC) 389 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 390 if (sblock.fs_ncg < 1) 391 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 392 if (sblock.fs_cpg < 1) 393 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 394 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 395 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 396 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 397 if (sblock.fs_sbsize > SBSIZE) 398 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 399 /* 400 * Compute block size that the filesystem is based on, 401 * according to fsbtodb, and adjust superblock block number 402 * so we can tell if this is an alternate later. 403 */ 404 super *= dev_bsize; 405 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 406 sblk.b_bno = super / dev_bsize; 407 if (bflag) { 408 havesb = 1; 409 return (1); 410 } 411 /* 412 * Set all possible fields that could differ, then do check 413 * of whole super block against an alternate super block. 414 * When an alternate super-block is specified this check is skipped. 415 */ 416 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 417 if (asblk.b_errs) 418 return (0); 419 altsblock.fs_firstfield = sblock.fs_firstfield; 420 altsblock.fs_unused_1 = sblock.fs_unused_1; 421 altsblock.fs_time = sblock.fs_time; 422 altsblock.fs_cstotal = sblock.fs_cstotal; 423 altsblock.fs_cgrotor = sblock.fs_cgrotor; 424 altsblock.fs_fmod = sblock.fs_fmod; 425 altsblock.fs_clean = sblock.fs_clean; 426 altsblock.fs_ronly = sblock.fs_ronly; 427 altsblock.fs_flags = sblock.fs_flags; 428 altsblock.fs_maxcontig = sblock.fs_maxcontig; 429 altsblock.fs_minfree = sblock.fs_minfree; 430 altsblock.fs_optim = sblock.fs_optim; 431 altsblock.fs_rotdelay = sblock.fs_rotdelay; 432 altsblock.fs_maxbpg = sblock.fs_maxbpg; 433 memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 434 altsblock.fs_csp = sblock.fs_csp; 435 altsblock.fs_maxcluster = sblock.fs_maxcluster; 436 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 437 memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 438 sizeof sblock.fs_snapinum); 439 memmove(altsblock.fs_sparecon, 440 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 441 /* 442 * The following should not have to be copied. 443 */ 444 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 445 altsblock.fs_interleave = sblock.fs_interleave; 446 altsblock.fs_npsect = sblock.fs_npsect; 447 altsblock.fs_nrpos = sblock.fs_nrpos; 448 altsblock.fs_state = sblock.fs_state; 449 altsblock.fs_qbmask = sblock.fs_qbmask; 450 altsblock.fs_qfmask = sblock.fs_qfmask; 451 altsblock.fs_state = sblock.fs_state; 452 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 453 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 454 if (debug) { 455 long *nlp, *olp, *endlp; 456 457 printf("superblock mismatches\n"); 458 nlp = (long *)&altsblock; 459 olp = (long *)&sblock; 460 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 461 for ( ; olp < endlp; olp++, nlp++) { 462 if (*olp == *nlp) 463 continue; 464 printf( 465 "offset %d, original %ld, alternate %ld\n", 466 olp - (long *)&sblock, *olp, *nlp); 467 } 468 } 469 badsb(listerr, 470 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 471 return (0); 472 } 473 havesb = 1; 474 return (1); 475} 476 477static void 478badsb(listerr, s) 479 int listerr; 480 char *s; 481{ 482 483 if (!listerr) 484 return; 485 if (preen) 486 printf("%s: ", cdevname); 487 pfatal("BAD SUPER BLOCK: %s\n", s); 488} 489 490/* 491 * Calculate a prototype superblock based on information in the disk label. 492 * When done the cgsblock macro can be calculated and the fs_ncg field 493 * can be used. Do NOT attempt to use other macros without verifying that 494 * their needed information is available! 495 */ 496static int 497calcsb(dev, devfd, fs) 498 char *dev; 499 int devfd; 500 register struct fs *fs; 501{ 502 register struct disklabel *lp; 503 register struct partition *pp; 504 register char *cp; 505 int i; 506 507 cp = strchr(dev, '\0') - 1; 508 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 509 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 510 return (0); 511 } 512 lp = getdisklabel(dev, devfd); 513 if (isdigit(*cp)) 514 pp = &lp->d_partitions[0]; 515 else 516 pp = &lp->d_partitions[*cp - 'a']; 517 if (pp->p_fstype != FS_BSDFFS) { 518 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 519 dev, pp->p_fstype < FSMAXTYPES ? 520 fstypenames[pp->p_fstype] : "unknown"); 521 return (0); 522 } 523 if (pp->p_fsize == 0 || pp->p_frag == 0 || 524 pp->p_cpg == 0 || pp->p_size == 0) { 525 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 526 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 527 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 528 return (0); 529 } 530 memset(fs, 0, sizeof(struct fs)); 531 fs->fs_fsize = pp->p_fsize; 532 fs->fs_frag = pp->p_frag; 533 fs->fs_cpg = pp->p_cpg; 534 fs->fs_size = pp->p_size; 535 fs->fs_ntrak = lp->d_ntracks; 536 fs->fs_nsect = lp->d_nsectors; 537 fs->fs_spc = lp->d_secpercyl; 538 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 539 fs->fs_sblkno = roundup( 540 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 541 fs->fs_frag); 542 fs->fs_cgmask = 0xffffffff; 543 for (i = fs->fs_ntrak; i > 1; i >>= 1) 544 fs->fs_cgmask <<= 1; 545 if (!POWEROF2(fs->fs_ntrak)) 546 fs->fs_cgmask <<= 1; 547 fs->fs_cgoffset = roundup( 548 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 549 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 550 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 551 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 552 fs->fs_fsbtodb++; 553 dev_bsize = lp->d_secsize; 554 return (1); 555} 556 557static struct disklabel * 558getdisklabel(s, fd) 559 char *s; 560 int fd; 561{ 562 static struct disklabel lab; 563 564 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 565 if (s == NULL) 566 return ((struct disklabel *)NULL); 567 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 568 errx(EEXIT, "%s: can't read disk label", s); 569 } 570 return (&lab); 571} 572