sbin/dump/main.c

   1 /*      $NetBSD: main.c,v 1.63 2006/10/26 20:02:30 hannken Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1980, 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 5/1/95";
  41 #else
  42 __RCSID("$NetBSD: main.c,v 1.63 2006/10/26 20:02:30 hannken Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/param.h>
  47 #include <sys/time.h>
  48 #include <sys/stat.h>
  49 #include <sys/mount.h>
  50
  51 #include <ufs/ufs/dinode.h>
  52 #include <ufs/ffs/fs.h>
  53 #include <ufs/ffs/ffs_extern.h>
  54
  55 #include <protocols/dumprestore.h>
  56
  57 #include <ctype.h>
  58 #include <err.h>
  59 #include <errno.h>
  60 #include <fcntl.h>
  61 #include <fstab.h>
  62 #include <signal.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <time.h>
  67 #include <unistd.h>
  68
  69 #include "dump.h"
  70 #include "pathnames.h"
  71 #include "snapshot.h"
  72
  73 int     timestamp;              /* print message timestamps */
  74 int     notify;                 /* notify operator flag */
  75 int     blockswritten;          /* number of blocks written on current tape */
  76 int     tapeno;                 /* current tape number */
  77 int     density;                /* density in bytes/0.1" */
  78 int     ntrec = NTREC;          /* # tape blocks in each tape record */
  79 int     cartridge;              /* Assume non-cartridge tape */
  80 long    dev_bsize = 1;          /* recalculated below */
  81 long    blocksperfile;          /* output blocks per file */
  82 const char *host;               /* remote host (if any) */
  83 int     readcache = -1;         /* read cache size (in readblksize blks) */
  84 int     readblksize = 32 * 1024; /* read block size */
  85 char    default_time_string[] = "%T %Z"; /* default timestamp string */
  86 char    *time_string = default_time_string; /* timestamp string */
  87
  88 int     main(int, char *[]);
  89 static long numarg(const char *, long, long);
  90 static void obsolete(int *, char **[]);
  91 static void usage(void);
  92
  93 int
  94 main(int argc, char *argv[])
  95 {
  96         ino_t ino;
  97         int dirty;
  98         union dinode *dp;
  99         struct fstab *dt;
 100         struct statvfs *mntinfo, fsbuf;
 101         char *map, *cp;
 102         int ch;
 103         int i, anydirskipped, bflag = 0, Tflag = 0, Fflag = 0, honorlevel = 1;
 104         int snap_internal = 0;
 105         ino_t maxino;
 106         time_t tnow, date;
 107         int dirc;
 108         char *mountpoint;
 109         int just_estimate = 0;
 110         char labelstr[LBLSIZE];
 111         char *new_time_format;
 112         char *snap_backup = NULL;
 113
 114         spcl.c_date = 0;
 115         (void)time(&tnow);
 116         spcl.c_date = tnow;
 117         tzset(); /* set up timezone for strftime */
 118         if ((new_time_format = getenv("TIMEFORMAT")) != NULL)
 119                 time_string = new_time_format;
 120
 121         tsize = 0;      /* Default later, based on 'c' option for cart tapes */
 122         if ((tape = getenv("TAPE")) == NULL)
 123                 tape = _PATH_DEFTAPE;
 124         dumpdates = _PATH_DUMPDATES;
 125         temp = _PATH_DTMP;
 126         strcpy(labelstr, "none");       /* XXX safe strcpy. */
 127         if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
 128                 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
 129         level = '0';
 130         timestamp = 0;
 131
 132         if (argc < 2)
 133                 usage();
 134
 135         obsolete(&argc, &argv);
 136         while ((ch = getopt(argc, argv,
 137             "0123456789aB:b:cd:eFf:h:k:l:L:nr:s:StT:uWwx:X")) != -1)
 138                 switch (ch) {
 139                 /* dump level */
 140                 case '0': case '1': case '2': case '3': case '4':
 141                 case '5': case '6': case '7': case '8': case '9':
 142                         level = ch;
 143                         break;
 144
 145                 case 'a':               /* `auto-size', Write to EOM. */
 146                         unlimited = 1;
 147                         break;
 148
 149                 case 'B':               /* blocks per output file */
 150                         blocksperfile = numarg("blocks per file", 1L, 0L);
 151                         break;
 152
 153                 case 'b':               /* blocks per tape write */
 154                         ntrec = numarg("blocks per write", 1L, 1000L);
 155                         bflag = 1;
 156                         break;
 157
 158                 case 'c':               /* Tape is cart. not 9-track */
 159                         cartridge = 1;
 160                         break;
 161
 162                 case 'd':               /* density, in bits per inch */
 163                         density = numarg("density", 10L, 327670L) / 10;
 164                         if (density >= 625 && !bflag)
 165                                 ntrec = HIGHDENSITYTREC;
 166                         break;
 167
 168                 case 'e':               /* eject full tapes */
 169                         eflag = 1;
 170                         break;
 171
 172                 case 'F':               /* files-to-dump is an fs image */
 173                         Fflag = 1;
 174                         break;
 175
 176                 case 'f':               /* output file */
 177                         tape = optarg;
 178                         break;
 179
 180                 case 'h':
 181                         honorlevel = numarg("honor level", 0L, 10L);
 182                         break;
 183
 184                 case 'k':
 185                         readblksize = numarg("read block size", 0, 64) * 1024;
 186                         break;
 187
 188                 case 'l':               /* autoload after eject full tapes */
 189                         eflag = 1;
 190                         lflag = numarg("timeout (in seconds)", 1, 0);
 191                         break;
 192
 193                 case 'L':
 194                         /*
 195                          * Note that although there are LBLSIZE characters,
 196                          * the last must be '\0', so the limit on strlen()
 197                          * is really LBLSIZE-1.
 198                          */
 199                         if (strlcpy(labelstr, optarg, sizeof(labelstr))
 200                             >= sizeof(labelstr)) {
 201                                 msg(
 202                 "WARNING Label `%s' is larger than limit of %lu characters.\n",
 203                                     optarg,
 204                                     (unsigned long)sizeof(labelstr) - 1);
 205                                 msg("WARNING: Using truncated label `%s'.\n",
 206                                     labelstr);
 207                         }
 208                         break;
 209                 case 'n':               /* notify operators */
 210                         notify = 1;
 211                         break;
 212
 213                 case 'r':               /* read cache size */
 214                         readcache = numarg("read cache size", 0, 512);
 215                         break;
 216
 217                 case 's':               /* tape size, feet */
 218                         tsize = numarg("tape size", 1L, 0L) * 12 * 10;
 219                         break;
 220
 221                 case 'S':               /* exit after estimating # of tapes */
 222                         just_estimate = 1;
 223                         break;
 224
 225                 case 't':
 226                         timestamp = 1;
 227                         break;
 228
 229                 case 'T':               /* time of last dump */
 230                         spcl.c_ddate = unctime(optarg);
 231                         if (spcl.c_ddate < 0) {
 232                                 (void)fprintf(stderr, "bad time \"%s\"\n",
 233                                     optarg);
 234                                 exit(X_STARTUP);
 235                         }
 236                         Tflag = 1;
 237                         lastlevel = '?';
 238                         break;
 239
 240                 case 'u':               /* update /etc/dumpdates */
 241                         uflag = 1;
 242                         break;
 243
 244                 case 'W':               /* what to do */
 245                 case 'w':
 246                         lastdump(ch);
 247                         exit(X_FINOK);  /* do nothing else */
 248
 249                 case 'x':
 250                         snap_backup = optarg;
 251                         break;
 252
 253                 case 'X':
 254                         snap_internal = 1;
 255                         break;
 256
 257                 default:
 258                         usage();
 259                 }
 260         argc -= optind;
 261         argv += optind;
 262
 263         if (argc < 1) {
 264                 (void)fprintf(stderr,
 265                     "Must specify disk or image, or file list\n");
 266                 exit(X_STARTUP);
 267         }
 268
 269
 270         /*
 271          *      determine if disk is a subdirectory, and setup appropriately
 272          */
 273         getfstab();             /* /etc/fstab snarfed */
 274         disk = NULL;
 275         disk_dev = NULL;
 276         mountpoint = NULL;
 277         dirc = 0;
 278         for (i = 0; i < argc; i++) {
 279                 struct stat sb;
 280
 281                 if (lstat(argv[i], &sb) == -1)
 282                         quit("Cannot stat %s: %s\n", argv[i], strerror(errno));
 283                 if (Fflag || S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
 284                         disk = argv[i];
 285  multicheck:
 286                         if (dirc != 0)
 287                                 quit(
 288         "Can't dump a disk or image at the same time as a file list\n");
 289                         break;
 290                 }
 291                 if ((dt = fstabsearch(argv[i])) != NULL) {
 292                         disk = dt->fs_spec;
 293                         mountpoint = xstrdup(dt->fs_file);
 294                         goto multicheck;
 295                 }
 296                 if (statvfs(argv[i], &fsbuf) == -1)
 297                         quit("Cannot statvfs %s: %s\n", argv[i],
 298                             strerror(errno));
 299                 disk = fsbuf.f_mntfromname;
 300                 if (strcmp(argv[i], fsbuf.f_mntonname) == 0)
 301                         goto multicheck;
 302                 if (mountpoint == NULL) {
 303                         mountpoint = xstrdup(fsbuf.f_mntonname);
 304                         if (uflag) {
 305                                 msg("Ignoring u flag for subdir dump\n");
 306                                 uflag = 0;
 307                         }
 308                         if (level > '0') {
 309                                 msg("Subdir dump is done at level 0\n");
 310                                 level = '0';
 311                         }
 312                         msg("Dumping sub files/directories from %s\n",
 313                             mountpoint);
 314                 } else {
 315                         if (strcmp(mountpoint, fsbuf.f_mntonname) != 0)
 316                                 quit("%s is not on %s\n", argv[i], mountpoint);
 317                 }
 318                 msg("Dumping file/directory %s\n", argv[i]);
 319                 dirc++;
 320         }
 321         if (mountpoint)
 322                 free(mountpoint);
 323
 324         if (dirc == 0) {
 325                 argv++;
 326                 if (argc != 1) {
 327                         (void)fprintf(stderr, "Excess arguments to dump:");
 328                         while (--argc)
 329                                 (void)fprintf(stderr, " %s", *argv++);
 330                         (void)fprintf(stderr, "\n");
 331                         exit(X_STARTUP);
 332                 }
 333         }
 334         if (Tflag && uflag) {
 335                 (void)fprintf(stderr,
 336                     "You cannot use the T and u flags together.\n");
 337                 exit(X_STARTUP);
 338         }
 339         if (strcmp(tape, "-") == 0) {
 340                 pipeout++;
 341                 tape = "standard output";
 342         }
 343
 344         if (blocksperfile)
 345                 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
 346         else if (!unlimited) {
 347                 /*
 348                  * Determine how to default tape size and density
 349                  *
 350                  *              density                         tape size
 351                  * 9-track      1600 bpi (160 bytes/.1")        2300 ft.
 352                  * 9-track      6250 bpi (625 bytes/.1")        2300 ft.
 353                  * cartridge    8000 bpi (100 bytes/.1")        1700 ft.
 354                  *                                              (450*4 - slop)
 355                  */
 356                 if (density == 0)
 357                         density = cartridge ? 100 : 160;
 358                 if (tsize == 0)
 359                         tsize = cartridge ? 1700L*120L : 2300L*120L;
 360         }
 361
 362         if ((cp = strchr(tape, ':')) != NULL) {
 363                 host = tape;
 364                 /* This is fine, because all the const strings don't have : */
 365                 *cp++ = '\0';
 366                 tape = cp;
 367 #ifdef RDUMP
 368                 if (rmthost(host) == 0)
 369                         exit(X_STARTUP);
 370 #else
 371                 (void)fprintf(stderr, "remote dump not enabled\n");
 372                 exit(X_STARTUP);
 373 #endif
 374         }
 375
 376         if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
 377                 signal(SIGHUP, sig);
 378         if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
 379                 signal(SIGTRAP, sig);
 380         if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
 381                 signal(SIGFPE, sig);
 382         if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
 383                 signal(SIGBUS, sig);
 384 #if 0
 385         if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
 386                 signal(SIGSEGV, sig);
 387 #endif
 388         if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
 389                 signal(SIGTERM, sig);
 390         if (signal(SIGINT, interrupt) == SIG_IGN)
 391                 signal(SIGINT, SIG_IGN);
 392
 393         /*
 394          *      disk can be either the full special file name, or
 395          *      the file system name.
 396          */
 397         mountpoint = NULL;
 398         mntinfo = mntinfosearch(disk);
 399         if ((dt = fstabsearch(disk)) != NULL) {
 400                 disk = rawname(dt->fs_spec);
 401                 mountpoint = dt->fs_file;
 402                 msg("Found %s on %s in %s\n", disk, mountpoint, _PATH_FSTAB);
 403         } else if (mntinfo != NULL) {
 404                 disk = rawname(mntinfo->f_mntfromname);
 405                 mountpoint = mntinfo->f_mntonname;
 406                 msg("Found %s on %s in mount table\n", disk, mountpoint);
 407         }
 408         if (mountpoint != NULL) {
 409                 if (dirc != 0)
 410                         (void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
 411                             "a subset of %s", mountpoint);
 412                 else
 413                         (void)strlcpy(spcl.c_filesys, mountpoint,
 414                             sizeof(spcl.c_filesys));
 415         } else if (Fflag) {
 416                 (void)strlcpy(spcl.c_filesys, "a file system image",
 417                     sizeof(spcl.c_filesys));
 418         } else {
 419                 (void)strlcpy(spcl.c_filesys, "an unlisted file system",
 420                     sizeof(spcl.c_filesys));
 421         }
 422         (void)strlcpy(spcl.c_dev, disk, sizeof(spcl.c_dev));
 423         (void)strlcpy(spcl.c_label, labelstr, sizeof(spcl.c_label));
 424         (void)gethostname(spcl.c_host, sizeof(spcl.c_host));
 425         spcl.c_host[sizeof(spcl.c_host) - 1] = '\0';
 426
 427         if ((snap_backup != NULL || snap_internal) && mntinfo == NULL) {
 428                 msg("WARNING: Cannot use -x or -X on unmounted file system.\n");
 429                 snap_backup = NULL;
 430                 snap_internal = 0;
 431         }
 432
 433 #ifdef DUMP_LFS
 434         sync();
 435         if (snap_backup != NULL || snap_internal) {
 436                 if (lfs_wrap_stop(mountpoint) < 0) {
 437                         msg("Cannot stop writing on %s\n", mountpoint);
 438                         exit(X_STARTUP);
 439                 }
 440         }
 441         if ((diskfd = open(disk, O_RDONLY)) < 0) {
 442                 msg("Cannot open %s\n", disk);
 443                 exit(X_STARTUP);
 444         }
 445         disk_dev = disk;
 446 #else /* ! DUMP_LFS */
 447         if (snap_backup != NULL || snap_internal) {
 448                 diskfd = snap_open(mntinfo->f_mntonname, snap_backup,
 449                     &tnow, &disk_dev);
 450                 if (diskfd < 0) {
 451                         msg("Cannot open snapshot of %s\n",
 452                                 mntinfo->f_mntonname);
 453                         exit(X_STARTUP);
 454                 }
 455                 spcl.c_date = tnow;
 456         } else {
 457                 if ((diskfd = open(disk, O_RDONLY)) < 0) {
 458                         msg("Cannot open %s\n", disk);
 459                         exit(X_STARTUP);
 460                 }
 461                 disk_dev = disk;
 462         }
 463         sync();
 464 #endif /* ! DUMP_LFS */
 465
 466         needswap = fs_read_sblock(sblock_buf);
 467
 468         spcl.c_level = iswap32(level - '0');
 469         spcl.c_type = iswap32(TS_TAPE);
 470         spcl.c_date = iswap32(spcl.c_date);
 471         spcl.c_ddate = iswap32(spcl.c_ddate);
 472         if (!Tflag)
 473                 getdumptime();          /* /etc/dumpdates snarfed */
 474
 475         date = iswap32(spcl.c_date);
 476         msg("Date of this level %c dump: %s", level,
 477                 spcl.c_date == 0 ? "the epoch\n" : ctime(&date));
 478         date = iswap32(spcl.c_ddate);
 479         msg("Date of last level %c dump: %s", lastlevel,
 480                 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&date));
 481         msg("Dumping ");
 482         if (snap_backup != NULL || snap_internal)
 483                 msgtail("a snapshot of ");
 484         if (dirc != 0)
 485                 msgtail("a subset of ");
 486         msgtail("%s (%s) ", disk, spcl.c_filesys);
 487         if (host)
 488                 msgtail("to %s on host %s\n", tape, host);
 489         else
 490                 msgtail("to %s\n", tape);
 491         msg("Label: %s\n", labelstr);
 492
 493         ufsib = fs_parametrize();
 494
 495         dev_bshift = ffs(dev_bsize) - 1;
 496         if (dev_bsize != (1 << dev_bshift))
 497                 quit("dev_bsize (%ld) is not a power of 2", dev_bsize);
 498         tp_bshift = ffs(TP_BSIZE) - 1;
 499         if (TP_BSIZE != (1 << tp_bshift))
 500                 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
 501         maxino = fs_maxino();
 502         mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
 503         usedinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
 504         dumpdirmap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
 505         dumpinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
 506         tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
 507
 508         nonodump = iswap32(spcl.c_level) < honorlevel;
 509
 510         initcache(readcache, readblksize);
 511
 512         (void)signal(SIGINFO, statussig);
 513
 514         msg("mapping (Pass I) [regular files]\n");
 515         anydirskipped = mapfiles(maxino, &tapesize, mountpoint,
 516             (dirc ? argv : NULL));
 517
 518         msg("mapping (Pass II) [directories]\n");
 519         while (anydirskipped) {
 520                 anydirskipped = mapdirs(maxino, &tapesize);
 521         }
 522
 523         if (pipeout || unlimited) {
 524                 tapesize += 10; /* 10 trailer blocks */
 525                 msg("estimated %llu tape blocks.\n",
 526                     (unsigned long long)tapesize);
 527         } else {
 528                 double fetapes;
 529
 530                 if (blocksperfile)
 531                         fetapes = (double) tapesize / blocksperfile;
 532                 else if (cartridge) {
 533                         /* Estimate number of tapes, assuming streaming stops at
 534                            the end of each block written, and not in mid-block.
 535                            Assume no erroneous blocks; this can be compensated
 536                            for with an artificially low tape size. */
 537                         fetapes =
 538                         (         (double) tapesize     /* blocks */
 539                                 * TP_BSIZE      /* bytes/block */
 540                                 * (1.0/density) /* 0.1" / byte */
 541                           +
 542                                   (double) tapesize     /* blocks */
 543                                 * (1.0/ntrec)   /* streaming-stops per block */
 544                                 * 15.48         /* 0.1" / streaming-stop */
 545                         ) * (1.0 / tsize );     /* tape / 0.1" */
 546                 } else {
 547                         /* Estimate number of tapes, for old fashioned 9-track
 548                            tape */
 549                         int tenthsperirg = (density == 625) ? 3 : 7;
 550                         fetapes =
 551                         (         tapesize      /* blocks */
 552                                 * TP_BSIZE      /* bytes / block */
 553                                 * (1.0/density) /* 0.1" / byte */
 554                           +
 555                                   tapesize      /* blocks */
 556                                 * (1.0/ntrec)   /* IRG's / block */
 557                                 * tenthsperirg  /* 0.1" / IRG */
 558                         ) * (1.0 / tsize );     /* tape / 0.1" */
 559                 }
 560                 etapes = fetapes;               /* truncating assignment */
 561                 etapes++;
 562                 /* count the dumped inodes map on each additional tape */
 563                 tapesize += (etapes - 1) *
 564                         (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
 565                 tapesize += etapes + 10;        /* headers + 10 trailer blks */
 566                 msg("estimated %llu tape blocks on %3.2f tape(s).\n",
 567                     (unsigned long long)tapesize, fetapes);
 568         }
 569         /*
 570          * If the user only wants an estimate of the number of
 571          * tapes, exit now.
 572          */
 573         if (just_estimate)
 574                 exit(X_FINOK);
 575
 576         /*
 577          * Allocate tape buffer.
 578          */
 579         if (!alloctape())
 580                 quit("can't allocate tape buffers - try a smaller blocking factor.\n");
 581
 582         startnewtape(1);
 583         (void)time((time_t *)&(tstart_writing));
 584         xferrate = 0;
 585         dumpmap(usedinomap, TS_CLRI, maxino - 1);
 586
 587         msg("dumping (Pass III) [directories]\n");
 588         dirty = 0;              /* XXX just to get gcc to shut up */
 589         for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
 590                 if (((ino - 1) % NBBY) == 0)    /* map is offset by 1 */
 591                         dirty = *map++;
 592                 else
 593                         dirty >>= 1;
 594                 if ((dirty & 1) == 0)
 595                         continue;
 596                 /*
 597                  * Skip directory inodes deleted and maybe reallocated
 598                  */
 599                 dp = getino(ino);
 600                 if ((DIP(dp, mode) & IFMT) != IFDIR)
 601                         continue;
 602                 (void)dumpino(dp, ino);
 603         }
 604
 605         msg("dumping (Pass IV) [regular files]\n");
 606         for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
 607                 int mode;
 608
 609                 if (((ino - 1) % NBBY) == 0)    /* map is offset by 1 */
 610                         dirty = *map++;
 611                 else
 612                         dirty >>= 1;
 613                 if ((dirty & 1) == 0)
 614                         continue;
 615                 /*
 616                  * Skip inodes deleted and reallocated as directories.
 617                  */
 618                 dp = getino(ino);
 619                 mode = DIP(dp, mode) & IFMT;
 620                 if (mode == IFDIR)
 621                         continue;
 622                 (void)dumpino(dp, ino);
 623         }
 624
 625         spcl.c_type = iswap32(TS_END);
 626         for (i = 0; i < ntrec; i++)
 627                 writeheader(maxino - 1);
 628         if (pipeout)
 629                 msg("%d tape blocks\n",iswap32(spcl.c_tapea));
 630         else
 631                 msg("%d tape blocks on %d volume%s\n",
 632                     iswap32(spcl.c_tapea), iswap32(spcl.c_volume),
 633                     (iswap32(spcl.c_volume) == 1) ? "" : "s");
 634         tnow = do_stats();
 635         date = iswap32(spcl.c_date);
 636         msg("Date of this level %c dump: %s", level,
 637                 spcl.c_date == 0 ? "the epoch\n" : ctime(&date));
 638         msg("Date this dump completed:  %s", ctime(&tnow));
 639         msg("Average transfer rate: %d KB/s\n", xferrate / tapeno);
 640         putdumptime();
 641         trewind(0);
 642         broadcast("DUMP IS DONE!\a\a\n");
 643 #ifdef DUMP_LFS
 644         lfs_wrap_go();
 645 #endif /* DUMP_LFS */
 646         msg("DUMP IS DONE\n");
 647         Exit(X_FINOK);
 648         /* NOTREACHED */
 649         exit(X_FINOK);          /* XXX: to satisfy gcc */
 650 }
 651
 652 static void
 653 usage(void)
 654 {
 655         const char *prog = getprogname();
 656
 657         (void)fprintf(stderr,
 658 "usage: %s [-0123456789aceFnStuX] [-B records] [-b blocksize]\n"
 659 "            [-d density] [-f file] [-h level] [-k read-blocksize]\n"
 660 "            [-L label] [-l timeout] [-r read-cache] [-s feet]\n"
 661 "            [-T date] [-x snap-backup] files-to-dump\n"
 662 "       %s [-W | -w]\n", prog, prog);
 663         exit(X_STARTUP);
 664 }
 665
 666 /*
 667  * Pick up a numeric argument.  It must be nonnegative and in the given
 668  * range (except that a vmax of 0 means unlimited).
 669  */
 670 static long
 671 numarg(const char *meaning, long vmin, long vmax)
 672 {
 673         char *p;
 674         long val;
 675
 676         val = strtol(optarg, &p, 10);
 677         if (*p)
 678                 errx(X_STARTUP, "illegal %s -- %s", meaning, optarg);
 679         if (val < vmin || (vmax && val > vmax))
 680                 errx(X_STARTUP, "%s must be between %ld and %ld",
 681                     meaning, vmin, vmax);
 682         return (val);
 683 }
 684
 685 void
 686 sig(int signo)
 687 {
 688
 689         switch(signo) {
 690         case SIGALRM:
 691         case SIGBUS:
 692         case SIGFPE:
 693         case SIGHUP:
 694         case SIGTERM:
 695         case SIGTRAP:
 696                 if (pipeout)
 697                         quit("Signal on pipe: cannot recover\n");
 698                 msg("Rewriting attempted as response to signal %s.\n", sys_siglist[signo]);
 699                 (void)fflush(stderr);
 700                 (void)fflush(stdout);
 701                 close_rewind();
 702                 exit(X_REWRITE);
 703                 /* NOTREACHED */
 704         case SIGSEGV:
 705                 msg("SIGSEGV: ABORTING!\n");
 706                 (void)signal(SIGSEGV, SIG_DFL);
 707                 (void)kill(0, SIGSEGV);
 708                 /* NOTREACHED */
 709         }
 710 }
 711
 712 char *
 713 rawname(char *cp)
 714 {
 715         static char rawbuf[MAXPATHLEN];
 716         char *dp = strrchr(cp, '/');
 717
 718         if (dp == NULL)
 719                 return (NULL);
 720         *dp = '\0';
 721         (void)snprintf(rawbuf, sizeof rawbuf, "%s/r%s", cp, dp + 1);
 722         *dp = '/';
 723         return (rawbuf);
 724 }
 725
 726 /*
 727  * obsolete --
 728  *      Change set of key letters and ordered arguments into something
 729  *      getopt(3) will like.
 730  */
 731 static void
 732 obsolete(int *argcp, char **argvp[])
 733 {
 734         int argc, flags;
 735         char *ap, **argv, *flagsp, **nargv, *p;
 736
 737         /* Setup. */
 738         argv = *argvp;
 739         argc = *argcp;
 740
 741         /* Return if no arguments or first argument has leading dash. */
 742         ap = argv[1];
 743         if (argc == 1 || *ap == '-')
 744                 return;
 745
 746         /* Allocate space for new arguments. */
 747         *argvp = nargv = xmalloc((argc + 1) * sizeof(char *));
 748         p = flagsp = xmalloc(strlen(ap) + 2);
 749
 750         *nargv++ = *argv;
 751         argv += 2;
 752
 753         for (flags = 0; *ap; ++ap) {
 754                 switch (*ap) {
 755                 case 'B':
 756                 case 'b':
 757                 case 'd':
 758                 case 'f':
 759                 case 'h':
 760                 case 's':
 761                 case 'T':
 762                 case 'x':
 763                         if (*argv == NULL) {
 764                                 warnx("option requires an argument -- %c", *ap);
 765                                 usage();
 766                         }
 767                         nargv[0] = xmalloc(strlen(*argv) + 2 + 1);
 768                         nargv[0][0] = '-';
 769                         nargv[0][1] = *ap;
 770                         (void)strcpy(&nargv[0][2], *argv); /* XXX safe strcpy */
 771                         ++argv;
 772                         ++nargv;
 773                         break;
 774                 default:
 775                         if (!flags) {
 776                                 *p++ = '-';
 777                                 flags = 1;
 778                         }
 779                         *p++ = *ap;
 780                         break;
 781                 }
 782         }
 783
 784         /* Terminate flags. */
 785         if (flags) {
 786                 *p = '\0';
 787                 *nargv++ = flagsp;
 788         } else
 789                 free(flagsp);
 790
 791         /* Copy remaining arguments. */
 792         while ((*nargv++ = *argv++) != NULL)
 793                 ;
 794
 795         /* Update argument count. */
 796         *argcp = nargv - *argvp - 1;
 797 }
 798
 799
 800 void *
 801 xcalloc(size_t number, size_t size)
 802 {
 803         void *p;
 804
 805         p = calloc(number, size);
 806         if (p == NULL)
 807                 quit("%s\n", strerror(errno));
 808         return (p);
 809 }
 810
 811 void *
 812 xmalloc(size_t size)
 813 {
 814         void *p;
 815
 816         p = malloc(size);
 817         if (p == NULL)
 818                 quit("%s\n", strerror(errno));
 819         return (p);
 820 }
 821
 822 char *
 823 xstrdup(const char *str)
 824 {
 825         char *p;
 826
 827         p = strdup(str);
 828         if (p == NULL)
 829                 quit("%s\n", strerror(errno));
 830         return (p);
 831 }