dumplfs.c revision 1.1
1/*- 2 * Copyright (c) 1991, 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 35static char copyright[] = 36"@(#) Copyright (c) 1991, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41/*static char sccsid[] = "from: @(#)dumplfs.c 8.1 (Berkeley) 6/5/93";*/ 42static char *rcsid = "$Id: dumplfs.c,v 1.1 1994/06/08 18:58:50 mycroft Exp $"; 43#endif /* not lint */ 44 45#include <sys/param.h> 46#include <sys/ucred.h> 47#include <sys/mount.h> 48#include <sys/time.h> 49 50#include <ufs/ufs/dinode.h> 51#include <ufs/lfs/lfs.h> 52 53#include <fcntl.h> 54#include <fstab.h> 55#include <errno.h> 56#include <unistd.h> 57#include <stdlib.h> 58#include <stdio.h> 59#include <string.h> 60#include "extern.h" 61 62static void addseg __P((char *)); 63static void dump_cleaner_info __P((struct lfs *, void *)); 64static void dump_dinode __P((struct dinode *)); 65static void dump_ifile __P((int, struct lfs *, int)); 66static int dump_ipage_ifile __P((int, IFILE *, int)); 67static int dump_ipage_segusage __P((struct lfs *, int, IFILE *, int)); 68static void dump_segment __P((int, int, daddr_t, struct lfs *, int)); 69static int dump_sum __P((int, struct lfs *, SEGSUM *, int, daddr_t)); 70static void dump_super __P((struct lfs *)); 71static void usage __P((void)); 72 73typedef struct seglist SEGLIST; 74struct seglist { 75 SEGLIST *next; 76 int num; 77}; 78SEGLIST *seglist; 79 80int daddr_shift; 81char *special; 82 83/* Segment Usage formats */ 84#define print_suheader \ 85 (void)printf("segnum\tflags\tnbytes\tninos\tnsums\tlastmod\n") 86 87#define print_suentry(i, sp) \ 88 (void)printf("%d\t%c%c%c\t%d\t%d\t%d\t%s", i, \ 89 (((sp)->su_flags & SEGUSE_ACTIVE) ? 'A' : ' '), \ 90 (((sp)->su_flags & SEGUSE_DIRTY) ? 'D' : 'C'), \ 91 (((sp)->su_flags & SEGUSE_SUPERBLOCK) ? 'S' : ' '), \ 92 (sp)->su_nbytes, (sp)->su_ninos, (sp)->su_nsums, \ 93 ctime((time_t *)&(sp)->su_lastmod)) 94 95/* Ifile formats */ 96#define print_iheader \ 97 (void)printf("inum\tstatus\tversion\tdaddr\t\tfreeptr\n") 98#define print_ientry(i, ip) \ 99 if (ip->if_daddr == LFS_UNUSED_DADDR) \ 100 (void)printf("%d\tFREE\t%d\t \t\t%d\n", \ 101 i, ip->if_version, ip->if_nextfree); \ 102 else \ 103 (void)printf("%d\tINUSE\t%d\t%8X \n", \ 104 i, ip->if_version, ip->if_daddr) 105int 106main(argc, argv) 107 int argc; 108 char *argv[]; 109{ 110 struct lfs lfs_sb1, lfs_sb2, *lfs_master; 111 daddr_t seg_addr; 112 int ch, do_allsb, do_ientries, fd, segnum; 113 114 do_allsb = 0; 115 do_ientries = 0; 116 while ((ch = getopt(argc, argv, "ais:")) != EOF) 117 switch(ch) { 118 case 'a': /* Dump all superblocks */ 119 do_allsb = 1; 120 break; 121 case 'i': /* Dump ifile entries */ 122 do_ientries = 1; 123 break; 124 case 's': /* Dump out these segments */ 125 addseg(optarg); 126 break; 127 default: 128 usage(); 129 } 130 argc -= optind; 131 argv += optind; 132 133 if (argc != 1) 134 usage(); 135 136 special = argv[0]; 137 if ((fd = open(special, O_RDONLY, 0)) < 0) 138 err("%s: %s", special, strerror(errno)); 139 140 /* Read the first superblock */ 141 get(fd, LFS_LABELPAD, &lfs_sb1, sizeof(struct lfs)); 142 daddr_shift = lfs_sb1.lfs_bshift - lfs_sb1.lfs_fsbtodb; 143 144 /* 145 * Read the second superblock and figure out which check point is 146 * most up to date. 147 */ 148 get(fd, 149 lfs_sb1.lfs_sboffs[1] << daddr_shift, &lfs_sb2, sizeof(struct lfs)); 150 151 lfs_master = &lfs_sb1; 152 if (lfs_sb1.lfs_tstamp < lfs_sb2.lfs_tstamp) 153 lfs_master = &lfs_sb2; 154 155 (void)printf("Master Superblock:\n"); 156 dump_super(lfs_master); 157 158 dump_ifile(fd, lfs_master, do_ientries); 159 160 if (seglist != NULL) 161 for (; seglist != NULL; seglist = seglist->next) { 162 seg_addr = lfs_master->lfs_sboffs[0] + seglist->num * 163 (lfs_master->lfs_ssize << lfs_master->lfs_fsbtodb); 164 dump_segment(fd, 165 seglist->num, seg_addr, lfs_master, do_allsb); 166 } 167 else 168 for (segnum = 0, seg_addr = lfs_master->lfs_sboffs[0]; 169 segnum < lfs_master->lfs_nseg; segnum++, seg_addr += 170 lfs_master->lfs_ssize << lfs_master->lfs_fsbtodb) 171 dump_segment(fd, 172 segnum, seg_addr, lfs_master, do_allsb); 173 174 (void)close(fd); 175 exit(0); 176} 177 178/* 179 * We are reading all the blocks of an inode and dumping out the ifile table. 180 * This code could be tighter, but this is a first pass at getting the stuff 181 * printed out rather than making this code incredibly efficient. 182 */ 183static void 184dump_ifile(fd, lfsp, do_ientries) 185 int fd; 186 struct lfs *lfsp; 187 int do_ientries; 188{ 189 IFILE *ipage; 190 struct dinode *dip, *dpage; 191 daddr_t addr, *addrp, *dindir, *iaddrp, *indir; 192 int block_limit, i, inum, j, nblocks, nsupb, psize; 193 194 psize = lfsp->lfs_bsize; 195 addr = lfsp->lfs_idaddr; 196 197 if (!(dpage = malloc(psize))) 198 err("%s", strerror(errno)); 199 get(fd, addr << daddr_shift, dpage, psize); 200 201 for (dip = dpage + INOPB(lfsp) - 1; dip >= dpage; --dip) 202 if (dip->di_inumber == LFS_IFILE_INUM) 203 break; 204 205 if (dip < dpage) 206 err("unable to locate ifile inode"); 207 208 (void)printf("\nIFILE inode\n"); 209 dump_dinode(dip); 210 211 (void)printf("\nIFILE contents\n"); 212 nblocks = dip->di_size >> lfsp->lfs_bshift; 213 block_limit = MIN(nblocks, NDADDR); 214 215 /* Get the direct block */ 216 if ((ipage = malloc(psize)) == NULL) 217 err("%s", strerror(errno)); 218 for (inum = 0, addrp = dip->di_db, i = 0; i < block_limit; 219 i++, addrp++) { 220 get(fd, *addrp << daddr_shift, ipage, psize); 221 if (i < lfsp->lfs_cleansz) { 222 dump_cleaner_info(lfsp, ipage); 223 print_suheader; 224 continue; 225 } 226 227 if (i < (lfsp->lfs_segtabsz + lfsp->lfs_cleansz)) { 228 inum = dump_ipage_segusage(lfsp, inum, ipage, 229 lfsp->lfs_sepb); 230 if (!inum) 231 if(!do_ientries) 232 goto e0; 233 else 234 print_iheader; 235 } else 236 inum = dump_ipage_ifile(inum, ipage, lfsp->lfs_ifpb); 237 238 } 239 240 if (nblocks <= NDADDR) 241 goto e0; 242 243 /* Dump out blocks off of single indirect block */ 244 if (!(indir = malloc(psize))) 245 err("%s", strerror(errno)); 246 get(fd, dip->di_ib[0] << daddr_shift, indir, psize); 247 block_limit = MIN(i + lfsp->lfs_nindir, nblocks); 248 for (addrp = indir; i < block_limit; i++, addrp++) { 249 if (*addrp == LFS_UNUSED_DADDR) 250 break; 251 get(fd, *addrp << daddr_shift,ipage, psize); 252 if (i < lfsp->lfs_cleansz) { 253 dump_cleaner_info(lfsp, ipage); 254 continue; 255 } else 256 i -= lfsp->lfs_cleansz; 257 258 if (i < lfsp->lfs_segtabsz) { 259 inum = dump_ipage_segusage(lfsp, inum, ipage, 260 lfsp->lfs_sepb); 261 if (!inum) 262 if(!do_ientries) 263 goto e1; 264 else 265 print_iheader; 266 } else 267 inum = dump_ipage_ifile(inum, ipage, lfsp->lfs_ifpb); 268 } 269 270 if (nblocks <= lfsp->lfs_nindir * lfsp->lfs_ifpb) 271 goto e1; 272 273 /* Get the double indirect block */ 274 if (!(dindir = malloc(psize))) 275 err("%s", strerror(errno)); 276 get(fd, dip->di_ib[1] << daddr_shift, dindir, psize); 277 for (iaddrp = dindir, j = 0; j < lfsp->lfs_nindir; j++, iaddrp++) { 278 if (*iaddrp == LFS_UNUSED_DADDR) 279 break; 280 get(fd, *iaddrp << daddr_shift, indir, psize); 281 block_limit = MIN(i + lfsp->lfs_nindir, nblocks); 282 for (addrp = indir; i < block_limit; i++, addrp++) { 283 if (*addrp == LFS_UNUSED_DADDR) 284 break; 285 get(fd, *addrp << daddr_shift, ipage, psize); 286 if (i < lfsp->lfs_cleansz) { 287 dump_cleaner_info(lfsp, ipage); 288 continue; 289 } else 290 i -= lfsp->lfs_cleansz; 291 292 if (i < lfsp->lfs_segtabsz) { 293 inum = dump_ipage_segusage(lfsp, 294 inum, ipage, lfsp->lfs_sepb); 295 if (!inum) 296 if(!do_ientries) 297 goto e2; 298 else 299 print_iheader; 300 } else 301 inum = dump_ipage_ifile(inum, 302 ipage, lfsp->lfs_ifpb); 303 } 304 } 305e2: free(dindir); 306e1: free(indir); 307e0: free(dpage); 308 free(ipage); 309} 310 311static int 312dump_ipage_ifile(i, pp, tot) 313 int i; 314 IFILE *pp; 315 int tot; 316{ 317 IFILE *ip; 318 int cnt, max; 319 320 max = i + tot; 321 322 for (ip = pp, cnt = i; cnt < max; cnt++, ip++) 323 print_ientry(cnt, ip); 324 return (max); 325} 326 327static int 328dump_ipage_segusage(lfsp, i, pp, tot) 329 struct lfs *lfsp; 330 int i; 331 IFILE *pp; 332 int tot; 333{ 334 SEGUSE *sp; 335 int cnt, max; 336 337 max = i + tot; 338 for (sp = (SEGUSE *)pp, cnt = i; 339 cnt < lfsp->lfs_nseg && cnt < max; cnt++, sp++) 340 print_suentry(cnt, sp); 341 if (max >= lfsp->lfs_nseg) 342 return (0); 343 else 344 return (max); 345} 346 347static void 348dump_dinode(dip) 349 struct dinode *dip; 350{ 351 int i; 352 353 (void)printf("%s%d\t%s%d\t%s%d\t%s%d\t%s%d\n", 354 "mode ", dip->di_mode, 355 "nlink ", dip->di_nlink, 356 "uid ", dip->di_uid, 357 "gid ", dip->di_gid, 358 "size ", dip->di_size); 359 (void)printf("%s%s%s%s%s%s", 360 "atime ", ctime(&dip->di_atime.ts_sec), 361 "mtime ", ctime(&dip->di_mtime.ts_sec), 362 "ctime ", ctime(&dip->di_ctime.ts_sec)); 363 (void)printf("inum %d\n", dip->di_inumber); 364 (void)printf("Direct Addresses\n"); 365 for (i = 0; i < NDADDR; i++) { 366 (void)printf("\t0x%X", dip->di_db[i]); 367 if ((i % 6) == 5) 368 (void)printf("\n"); 369 } 370 for (i = 0; i < NIADDR; i++) 371 (void)printf("\t0x%X", dip->di_ib[i]); 372 (void)printf("\n"); 373} 374 375static int 376dump_sum(fd, lfsp, sp, segnum, addr) 377 struct lfs *lfsp; 378 SEGSUM *sp; 379 int fd, segnum; 380 daddr_t addr; 381{ 382 FINFO *fp; 383 long *dp; 384 int i, j; 385 int ck; 386 int numblocks; 387 struct dinode *inop; 388 389 if (sp->ss_sumsum != (ck = cksum(&sp->ss_datasum, 390 LFS_SUMMARY_SIZE - sizeof(sp->ss_sumsum)))) { 391 (void)printf("dumplfs: %s %d address 0x%lx\n", 392 "corrupt summary block; segment", segnum, addr); 393 return(0); 394 } 395 396 (void)printf("Segment Summary Info at 0x%lx\n", addr); 397 (void)printf(" %s0x%X\t%s%d\t%s%d\n %s0x%X\t%s0x%X", 398 "next ", sp->ss_next, 399 "nfinfo ", sp->ss_nfinfo, 400 "ninos ", sp->ss_ninos, 401 "sumsum ", sp->ss_sumsum, 402 "datasum ", sp->ss_datasum ); 403 (void)printf("\tcreate %s", ctime((time_t *)&sp->ss_create)); 404 405 numblocks = (sp->ss_ninos + INOPB(lfsp) - 1) / INOPB(lfsp); 406 407 /* Dump out inode disk addresses */ 408 dp = (daddr_t *)sp; 409 dp += LFS_SUMMARY_SIZE / sizeof(daddr_t); 410 inop = malloc(1 << lfsp->lfs_bshift); 411 printf(" Inode addresses:"); 412 for (dp--, i = 0; i < sp->ss_ninos; dp--) { 413 printf("\t0x%X {", *dp); 414 get(fd, *dp << (lfsp->lfs_bshift - lfsp->lfs_fsbtodb), inop, 415 (1 << lfsp->lfs_bshift)); 416 for (j = 0; i < sp->ss_ninos && j < INOPB(lfsp); j++, i++) { 417 if (j > 0) 418 (void)printf(", "); 419 (void)printf("%d", inop[j].di_inumber); 420 } 421 (void)printf("}"); 422 if (((i/INOPB(lfsp)) % 4) == 3) 423 (void)printf("\n"); 424 } 425 free(inop); 426 427 printf("\n"); 428 for (fp = (FINFO *)(sp + 1), i = 0; i < sp->ss_nfinfo; i++) { 429 numblocks += fp->fi_nblocks; 430 (void)printf(" FINFO for inode: %d version %d nblocks %d\n", 431 fp->fi_ino, fp->fi_version, fp->fi_nblocks); 432 dp = &(fp->fi_blocks[0]); 433 for (j = 0; j < fp->fi_nblocks; j++, dp++) { 434 (void)printf("\t%d", *dp); 435 if ((j % 8) == 7) 436 (void)printf("\n"); 437 } 438 if ((j % 8) != 0) 439 (void)printf("\n"); 440 fp = (FINFO *)dp; 441 } 442 return (numblocks); 443} 444 445static void 446dump_segment(fd, segnum, addr, lfsp, dump_sb) 447 int fd, segnum; 448 daddr_t addr; 449 struct lfs *lfsp; 450 int dump_sb; 451{ 452 struct lfs lfs_sb, *sbp; 453 SEGSUM *sump; 454 char sumblock[LFS_SUMMARY_SIZE]; 455 int did_one, nblocks, sb; 456 off_t sum_offset, super_off; 457 458 (void)printf("\nSEGMENT %d (Disk Address 0x%X)\n", 459 addr >> (lfsp->lfs_segshift - daddr_shift), addr); 460 sum_offset = (addr << (lfsp->lfs_bshift - lfsp->lfs_fsbtodb)); 461 462 sb = 0; 463 did_one = 0; 464 do { 465 get(fd, sum_offset, sumblock, LFS_SUMMARY_SIZE); 466 sump = (SEGSUM *)sumblock; 467 if (sump->ss_sumsum != cksum (&sump->ss_datasum, 468 LFS_SUMMARY_SIZE - sizeof(sump->ss_sumsum))) { 469 sbp = (struct lfs *)sump; 470 if (sb = (sbp->lfs_magic == LFS_MAGIC)) { 471 super_off = sum_offset; 472 sum_offset += LFS_SBPAD; 473 } else if (did_one) 474 break; 475 else { 476 printf("Segment at 0x%X corrupt\n", addr); 477 break; 478 } 479 } else { 480 nblocks = dump_sum(fd, lfsp, sump, segnum, sum_offset >> 481 (lfsp->lfs_bshift - lfsp->lfs_fsbtodb)); 482 if (nblocks) 483 sum_offset += LFS_SUMMARY_SIZE + 484 (nblocks << lfsp->lfs_bshift); 485 else 486 sum_offset = 0; 487 did_one = 1; 488 } 489 } while (sum_offset); 490 491 if (dump_sb && sb) { 492 get(fd, super_off, &lfs_sb, sizeof(struct lfs)); 493 dump_super(&lfs_sb); 494 } 495 return; 496} 497 498static void 499dump_super(lfsp) 500 struct lfs *lfsp; 501{ 502 int i; 503 504 (void)printf("%s0x%X\t%s0x%X\t%s%d\t%s%d\n", 505 "magic ", lfsp->lfs_magic, 506 "version ", lfsp->lfs_version, 507 "size ", lfsp->lfs_size, 508 "ssize ", lfsp->lfs_ssize); 509 (void)printf("%s%d\t\t%s%d\t%s%d\t%s%d\n", 510 "dsize ", lfsp->lfs_dsize, 511 "bsize ", lfsp->lfs_bsize, 512 "fsize ", lfsp->lfs_fsize, 513 "frag ", lfsp->lfs_frag); 514 515 (void)printf("%s%d\t\t%s%d\t%s%d\t%s%d\n", 516 "minfree ", lfsp->lfs_minfree, 517 "inopb ", lfsp->lfs_inopb, 518 "ifpb ", lfsp->lfs_ifpb, 519 "nindir ", lfsp->lfs_nindir); 520 521 (void)printf("%s%d\t\t%s%d\t%s%d\t%s%d\n", 522 "nseg ", lfsp->lfs_nseg, 523 "nspf ", lfsp->lfs_nspf, 524 "cleansz ", lfsp->lfs_cleansz, 525 "segtabsz ", lfsp->lfs_segtabsz); 526 527 (void)printf("%s0x%X\t%s%d\t%s0x%X\t%s%d\n", 528 "segmask ", lfsp->lfs_segmask, 529 "segshift ", lfsp->lfs_segshift, 530 "bmask ", lfsp->lfs_bmask, 531 "bshift ", lfsp->lfs_bshift); 532 533 (void)printf("%s0x%X\t\t%s%d\t%s0x%X\t%s%d\n", 534 "ffmask ", lfsp->lfs_ffmask, 535 "ffshift ", lfsp->lfs_ffshift, 536 "fbmask ", lfsp->lfs_fbmask, 537 "fbshift ", lfsp->lfs_fbshift); 538 539 (void)printf("%s%d\t%s%d\t%s0x%X\t%s0x%qx\n", 540 "sushift ", lfsp->lfs_sushift, 541 "fsbtodb ", lfsp->lfs_fsbtodb, 542 "cksum ", lfsp->lfs_cksum, 543 "maxfilesize ", lfsp->lfs_maxfilesize); 544 545 (void)printf("Superblock disk addresses:\t"); 546 for (i = 0; i < LFS_MAXNUMSB; i++) { 547 (void)printf(" 0x%X", lfsp->lfs_sboffs[i]); 548 if ( i == (LFS_MAXNUMSB >> 1)) 549 (void)printf("\n\t\t\t\t"); 550 } 551 (void)printf("\n"); 552 553 (void)printf("Checkpoint Info\n"); 554 (void)printf("%s%d\t%s0x%X\t%s%d\n", 555 "free ", lfsp->lfs_free, 556 "idaddr ", lfsp->lfs_idaddr, 557 "ifile ", lfsp->lfs_ifile); 558 (void)printf("%s%d\t%s%d\t%s%d\n", 559 "bfree ", lfsp->lfs_bfree, 560 "avail ", lfsp->lfs_avail, 561 "uinodes ", lfsp->lfs_uinodes); 562 (void)printf("%s%d\t%s0x%X\t%s0x%X\n%s0x%X\t%s0x%X\t", 563 "nfiles ", lfsp->lfs_nfiles, 564 "lastseg ", lfsp->lfs_lastseg, 565 "nextseg ", lfsp->lfs_nextseg, 566 "curseg ", lfsp->lfs_curseg, 567 "offset ", lfsp->lfs_offset); 568 (void)printf("tstamp %s", ctime((time_t *)&lfsp->lfs_tstamp)); 569 (void)printf("\nIn-Memory Information\n"); 570 (void)printf("%s%d\t%s0x%X\t%s%d%s%d\t%s%d\n", 571 "seglock ", lfsp->lfs_seglock, 572 "iocount ", lfsp->lfs_iocount, 573 "writer ", lfsp->lfs_writer, 574 "dirops ", lfsp->lfs_dirops, 575 "doifile ", lfsp->lfs_doifile); 576 (void)printf("%s%d\t%s%d\t%s0x%X\t%s%d\n", 577 "nactive ", lfsp->lfs_nactive, 578 "fmod ", lfsp->lfs_fmod, 579 "clean ", lfsp->lfs_clean, 580 "ronly ", lfsp->lfs_ronly); 581} 582 583static void 584addseg(arg) 585 char *arg; 586{ 587 SEGLIST *p; 588 589 if ((p = malloc(sizeof(SEGLIST))) == NULL) 590 err("%s", strerror(errno)); 591 p->next = seglist; 592 p->num = atoi(arg); 593 seglist = p; 594} 595 596static void 597dump_cleaner_info(lfsp, ipage) 598 struct lfs *lfsp; 599 void *ipage; 600{ 601 CLEANERINFO *cip; 602 603 cip = (CLEANERINFO *)ipage; 604 (void)printf("segments clean\t%d\tsegments dirty\t%d\n\n", 605 cip->clean, cip->dirty); 606} 607 608static void 609usage() 610{ 611 (void)fprintf(stderr, "usage: dumplfs [-ai] [-s segnum] file\n"); 612 exit(1); 613} 614