sbin/dump/main.c

   1 /*-
   2  * Copyright (c) 1980, 1991, 1993, 1994
   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California.  All rights reserved.
  30  * @(#)main.c   8.6 (Berkeley) 5/1/95
  31  * $FreeBSD: src/sbin/dump/main.c,v 1.20.2.9 2003/01/25 18:54:59 dillon Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/stat.h>
  36 #include <sys/time.h>
  37 #include <vfs/ufs/dinode.h>
  38 #include <vfs/ufs/fs.h>
  39
  40 #include <protocols/dumprestore.h>
  41
  42 #include <ctype.h>
  43 #include <err.h>
  44 #include <fcntl.h>
  45 #include <fstab.h>
  46 #include <signal.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include "dump.h"
  53 #include "pathnames.h"
  54
  55 int     mapsize;        /* size of the state maps */
  56 char    *usedinomap;    /* map of allocated inodes */
  57 char    *dumpdirmap;    /* map of directories to be dumped */
  58 char    *dumpinomap;    /* map of files to be dumped */
  59
  60 #ifndef SBOFF
  61 #define SBOFF (SBLOCK * DEV_BSIZE)
  62 #endif
  63
  64 char    *disk;          /* name of the disk file */
  65 const char *tape;       /* name of the tape file */
  66 int     level;          /* dump level of this dump */
  67 int     uflag;          /* update flag */
  68 int     diskfd;         /* disk file descriptor */
  69 int     pipeout;        /* true => output to standard output */
  70 int     density = 0;    /* density in bytes/0.1" " <- this is for hilit19 */
  71 long    tapesize;       /* estimated tape size, blocks */
  72 long    tsize;          /* tape size in 0.1" units */
  73 int     etapes;         /* estimated number of tapes */
  74 int     nonodump;       /* if set, do not honor UF_NODUMP user flags */
  75 int     unlimited;      /* if set, write to end of medium */
  76 int     cachesize = 0;  /* block cache size (in bytes) */
  77 int     notify = 0;     /* notify operator flag */
  78 int     blockswritten = 0; /* number of blocks written on current tape */
  79 int     tapeno = 0;     /* current tape number */
  80 int     ntrec = NTREC;  /* # tape blocks in each tape record */
  81 long    blocksperfile;  /* output blocks per file */
  82 int     cartridge = 0;  /* Assume non-cartridge tape */
  83 int     dokerberos = 0; /* Use Kerberos authentication */
  84 long    dev_bsize = 1;  /* recalculated below */
  85 const char *host;       /* remote host (if any) */
  86 time_t  tstart_writing; /* when started writing the first tape block */
  87 time_t  tend_writing;   /* after writing the last tape block */
  88 int     passno;         /* current dump pass number */
  89 struct  fs *sblock;     /* the file system super block */
  90 int     dev_bshift;     /* log2(dev_bsize) */
  91 int     tp_bshift;      /* log2(TP_BSIZE) */
  92 char    sblock_buf[MAXBSIZE];
  93 static long     numarg(const char *, long, long);
  94 static void     obsolete(int *, char **[]);
  95 static void     usage(void);
  96
  97 int
  98 main(int argc, char **argv)
  99 {
 100         struct stat sb;
 101         ufs1_ino_t ino;
 102         int dirty;
 103         struct ufs1_dinode *dp;
 104         struct  fstab *dt;
 105         char *map;
 106         int ch;
 107         int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
 108         int just_estimate = 0;
 109         ufs1_ino_t maxino;
 110
 111         spcl.c_date = 0;
 112         time((time_t *)&spcl.c_date);
 113
 114         tsize = 0;      /* Default later, based on 'c' option for cart tapes */
 115         if ((tape = getenv("TAPE")) == NULL)
 116                 tape = _PATH_DEFTAPE;
 117         dumpdates = _PATH_DUMPDATES;
 118         if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
 119                 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
 120         level = '0';
 121
 122         if (argc < 2)
 123                 usage();
 124
 125         obsolete(&argc, &argv);
 126 #ifdef KERBEROS
 127 #define optstring "0123456789aB:b:cd:f:h:kns:ST:uWwD:C:"
 128 #else
 129 #define optstring "0123456789aB:b:cd:f:h:ns:ST:uWwD:C:"
 130 #endif
 131         while ((ch = getopt(argc, argv, optstring)) != -1)
 132 #undef optstring
 133                 switch (ch) {
 134                 /* dump level */
 135                 case '0': case '1': case '2': case '3': case '4':
 136                 case '5': case '6': case '7': case '8': case '9':
 137                         level = ch;
 138                         break;
 139
 140                 case 'a':               /* `auto-size', Write to EOM. */
 141                         unlimited = 1;
 142                         break;
 143
 144                 case 'B':               /* blocks per output file */
 145                         blocksperfile = numarg("number of blocks per file",
 146                             1L, 0L);
 147                         break;
 148
 149                 case 'b':               /* blocks per tape write */
 150                         ntrec = numarg("number of blocks per write",
 151                             1L, 1000L);
 152                         break;
 153
 154                 case 'c':               /* Tape is cart. not 9-track */
 155                         cartridge = 1;
 156                         break;
 157
 158                 case 'd':               /* density, in bits per inch */
 159                         density = numarg("density", 10L, 327670L) / 10;
 160                         if (density >= 625 && !bflag)
 161                                 ntrec = HIGHDENSITYTREC;
 162                         break;
 163
 164                 case 'f':               /* output file */
 165                         tape = optarg;
 166                         break;
 167
 168                 case 'D':
 169                         dumpdates = optarg;
 170                         break;
 171
 172                 case 'C':
 173                         cachesize = numarg("cachesize", 0, 0) * 1024 * 1024;
 174                         break;
 175
 176                 case 'h':
 177                         honorlevel = numarg("honor level", 0L, 10L);
 178                         break;
 179
 180 #ifdef KERBEROS
 181                 case 'k':
 182                         dokerberos = 1;
 183                         break;
 184 #endif
 185
 186                 case 'n':               /* notify operators */
 187                         notify = 1;
 188                         break;
 189
 190                 case 's':               /* tape size, feet */
 191                         tsize = numarg("tape size", 1L, 0L) * 12 * 10;
 192                         break;
 193
 194                 case 'S':               /* exit after estimating # of tapes */
 195                         just_estimate = 1;
 196                         break;
 197
 198                 case 'T':               /* time of last dump */
 199                         spcl.c_ddate = unctime(optarg);
 200                         if (spcl.c_ddate < 0) {
 201                                 fprintf(stderr, "bad time \"%s\"\n", optarg);
 202                                 exit(X_STARTUP);
 203                         }
 204                         Tflag = 1;
 205                         lastlevel = '?';
 206                         break;
 207
 208                 case 'u':               /* update /etc/dumpdates */
 209                         uflag = 1;
 210                         break;
 211
 212                 case 'W':               /* what to do */
 213                 case 'w':
 214                         lastdump(ch);
 215                         exit(X_FINOK);  /* do nothing else */
 216
 217                 default:
 218                         usage();
 219                 }
 220         argc -= optind;
 221         argv += optind;
 222
 223         if (argc < 1) {
 224                 fprintf(stderr, "Must specify disk or filesystem\n");
 225                 exit(X_STARTUP);
 226         }
 227         disk = *argv++;
 228         argc--;
 229         if (argc >= 1) {
 230                 fprintf(stderr, "Unknown arguments to dump:");
 231                 while (argc--)
 232                         fprintf(stderr, " %s", *argv++);
 233                 fprintf(stderr, "\n");
 234                 exit(X_STARTUP);
 235         }
 236         if (Tflag && uflag) {
 237                 fprintf(stderr, "You cannot use the T and u flags together.\n");
 238                 exit(X_STARTUP);
 239         }
 240         if (strcmp(tape, "-") == 0) {
 241                 pipeout++;
 242                 tape = "standard output";
 243         }
 244
 245         if (blocksperfile)
 246                 blocksperfile = rounddown(blocksperfile, ntrec); /* round down */
 247         else if (!unlimited) {
 248                 /*
 249                  * Determine how to default tape size and density
 250                  *
 251                  *              density                         tape size
 252                  * 9-track      1600 bpi (160 bytes/.1")        2300 ft.
 253                  * 9-track      6250 bpi (625 bytes/.1")        2300 ft.
 254                  * cartridge    8000 bpi (100 bytes/.1")        1700 ft.
 255                  *                                              (450*4 - slop)
 256                  * hilit19 hits again: "
 257                  */
 258                 if (density == 0)
 259                         density = cartridge ? 100 : 160;
 260                 if (tsize == 0)
 261                         tsize = cartridge ? 1700L*120L : 2300L*120L;
 262         }
 263
 264         if (strchr(tape, ':')) {
 265                 char *ehost;
 266                 if ((host = strdup(tape)) == NULL)
 267                         err(1, "strdup failed");
 268                 ehost = strchr(host, ':');
 269                 *ehost++ = '\0';
 270                 tape = ehost;
 271 #ifdef RDUMP
 272                 if (strchr(tape, '\n')) {
 273                     fprintf(stderr, "invalid characters in tape\n");
 274                     exit(X_STARTUP);
 275                 }
 276                 if (rmthost(host) == 0)
 277                         exit(X_STARTUP);
 278 #else
 279                 fprintf(stderr, "remote dump not enabled\n");
 280                 exit(X_STARTUP);
 281 #endif
 282         }
 283         setuid(getuid()); /* rmthost() is the only reason to be setuid */
 284
 285         if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
 286                 signal(SIGHUP, sig);
 287         if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
 288                 signal(SIGTRAP, sig);
 289         if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
 290                 signal(SIGFPE, sig);
 291         if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
 292                 signal(SIGBUS, sig);
 293         if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
 294                 signal(SIGSEGV, sig);
 295         if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
 296                 signal(SIGTERM, sig);
 297         if (signal(SIGINT, interrupt) == SIG_IGN)
 298                 signal(SIGINT, SIG_IGN);
 299
 300         dump_getfstab();                /* /etc/fstab snarfed */
 301         /*
 302          *      disk can be either the full special file name,
 303          *      the suffix of the special file name,
 304          *      the special name missing the leading '/',
 305          *      the file system name with or without the leading '/'.
 306          */
 307         dt = fstabsearch(disk);
 308         if (dt != NULL) {
 309                 disk = rawname(dt->fs_spec);
 310                 strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
 311                 strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
 312         } else {
 313                 strncpy(spcl.c_dev, disk, NAMELEN);
 314                 strncpy(spcl.c_filesys, "an unlisted file system", NAMELEN);
 315         }
 316         spcl.c_dev[NAMELEN-1]='\0';
 317         spcl.c_filesys[NAMELEN-1]='\0';
 318         strcpy(spcl.c_label, "none");
 319         gethostname(spcl.c_host, NAMELEN);
 320         spcl.c_level = level - '0';
 321         spcl.c_type = TS_TAPE;
 322         if (!Tflag)
 323                 getdumptime();          /* /etc/dumpdates snarfed */
 324
 325         msg("Date of this level %c dump: %s", level,
 326                 spcl.c_date == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_date));
 327         msg("Date of last level %c dump: %s", lastlevel,
 328                 spcl.c_ddate == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_ddate));
 329         msg("Dumping %s ", disk);
 330         if (dt != NULL)
 331                 msgtail("(%s) ", dt->fs_file);
 332         if (host)
 333                 msgtail("to %s on host %s\n", tape, host);
 334         else
 335                 msgtail("to %s\n", tape);
 336
 337         if ((diskfd = open(disk, O_RDONLY)) < 0)
 338                 err(X_STARTUP, "Cannot open %s", disk);
 339         if (fstat(diskfd, &sb) != 0)
 340                 err(X_STARTUP, "%s: stat", disk);
 341         if (S_ISDIR(sb.st_mode))
 342                 errx(X_STARTUP, "%s: unknown file system", disk);
 343         sync();
 344         sblock = (struct fs *)sblock_buf;
 345         bread(SBOFF, (char *) sblock, SBSIZE);
 346         if (sblock->fs_magic != FS_MAGIC)
 347                 quit("bad sblock magic number\n");
 348         dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
 349         dev_bshift = ffs(dev_bsize) - 1;
 350         if (dev_bsize != (1 << dev_bshift))
 351                 quit("dev_bsize (%ld) is not a power of 2", dev_bsize);
 352         tp_bshift = ffs(TP_BSIZE) - 1;
 353         if (TP_BSIZE != (1 << tp_bshift))
 354                 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
 355 #ifdef FS_44INODEFMT
 356         if (sblock->fs_inodefmt >= FS_44INODEFMT)
 357                 spcl.c_flags |= DR_NEWINODEFMT;
 358 #endif
 359         maxino = sblock->fs_ipg * sblock->fs_ncg;
 360         mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
 361         usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
 362         dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char));
 363         dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
 364         tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
 365
 366         nonodump = spcl.c_level < honorlevel;
 367
 368         passno = 1;
 369         setproctitle("%s: pass 1: regular files", disk);
 370         msg("mapping (Pass I) [regular files]\n");
 371         anydirskipped = mapfiles(maxino, &tapesize);
 372
 373         passno = 2;
 374         setproctitle("%s: pass 2: directories", disk);
 375         msg("mapping (Pass II) [directories]\n");
 376         while (anydirskipped) {
 377                 anydirskipped = mapdirs(maxino, &tapesize);
 378         }
 379
 380         if (pipeout || unlimited) {
 381                 tapesize += 10; /* 10 trailer blocks */
 382                 msg("estimated %ld tape blocks.\n", tapesize);
 383         } else {
 384                 double fetapes;
 385
 386                 if (blocksperfile)
 387                         fetapes = (double) tapesize / blocksperfile;
 388                 else if (cartridge) {
 389                         /* Estimate number of tapes, assuming streaming stops at
 390                            the end of each block written, and not in mid-block.
 391                            Assume no erroneous blocks; this can be compensated
 392                            for with an artificially low tape size. */
 393                         fetapes =
 394                         (         (double) tapesize     /* blocks */
 395                                 * TP_BSIZE      /* bytes/block */
 396                                 * (1.0/density) /* 0.1" / byte " */
 397                           +
 398                                   (double) tapesize     /* blocks */
 399                                 * (1.0/ntrec)   /* streaming-stops per block */
 400                                 * 15.48         /* 0.1" / streaming-stop " */
 401                         ) * (1.0 / tsize );     /* tape / 0.1" " */
 402                 } else {
 403                         /* Estimate number of tapes, for old fashioned 9-track
 404                            tape */
 405                         int tenthsperirg = (density == 625) ? 3 : 7;
 406                         fetapes =
 407                         (         (double) tapesize     /* blocks */
 408                                 * TP_BSIZE      /* bytes / block */
 409                                 * (1.0/density) /* 0.1" / byte " */
 410                           +
 411                                   (double) tapesize     /* blocks */
 412                                 * (1.0/ntrec)   /* IRG's / block */
 413                                 * tenthsperirg  /* 0.1" / IRG " */
 414                         ) * (1.0 / tsize );     /* tape / 0.1" " */
 415                 }
 416                 etapes = fetapes;               /* truncating assignment */
 417                 etapes++;
 418                 /* count the dumped inodes map on each additional tape */
 419                 tapesize += (etapes - 1) *
 420                         (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
 421                 tapesize += etapes + 10;        /* headers + 10 trailer blks */
 422                 msg("estimated %ld tape blocks on %3.2f tape(s).\n",
 423                     tapesize, fetapes);
 424         }
 425
 426         /*
 427          * If the user only wants an estimate of the number of
 428          * tapes, exit now.
 429          */
 430         if (just_estimate)
 431                 exit(0);
 432
 433         /*
 434          * Allocate tape buffer.
 435          */
 436         if (!alloctape())
 437                 quit(
 438         "can't allocate tape buffers - try a smaller blocking factor.\n");
 439
 440         startnewtape(1);
 441         time((time_t *)&(tstart_writing));
 442         dumpmap(usedinomap, TS_CLRI, maxino - 1);
 443
 444         passno = 3;
 445         setproctitle("%s: pass 3: directories", disk);
 446         msg("dumping (Pass III) [directories]\n");
 447         dirty = 0;              /* XXX just to get gcc to shut up */
 448         for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
 449                 if (((ino - 1) % NBBY) == 0)    /* map is offset by 1 */
 450                         dirty = *map++;
 451                 else
 452                         dirty >>= 1;
 453                 if ((dirty & 1) == 0)
 454                         continue;
 455                 /*
 456                  * Skip directory inodes deleted and maybe reallocated
 457                  */
 458                 dp = getino(ino);
 459                 if ((dp->di_mode & IFMT) != IFDIR)
 460                         continue;
 461                 dumpino(dp, ino);
 462         }
 463
 464         passno = 4;
 465         setproctitle("%s: pass 4: regular files", disk);
 466         msg("dumping (Pass IV) [regular files]\n");
 467         for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
 468                 int mode;
 469
 470                 if (((ino - 1) % NBBY) == 0)    /* map is offset by 1 */
 471                         dirty = *map++;
 472                 else
 473                         dirty >>= 1;
 474                 if ((dirty & 1) == 0)
 475                         continue;
 476                 /*
 477                  * Skip inodes deleted and reallocated as directories.
 478                  */
 479                 dp = getino(ino);
 480                 mode = dp->di_mode & IFMT;
 481                 if (mode == IFDIR)
 482                         continue;
 483                 dumpino(dp, ino);
 484         }
 485
 486         time(&tend_writing);
 487         spcl.c_type = TS_END;
 488         for (i = 0; i < ntrec; i++)
 489                 writeheader(maxino - 1);
 490         if (pipeout)
 491                 msg("DUMP: %ld tape blocks\n", (long)spcl.c_tapea);
 492         else
 493                 msg("DUMP: %ld tape blocks on %d volume%s\n",
 494                     (long)spcl.c_tapea, spcl.c_volume,
 495                     (spcl.c_volume == 1) ? "" : "s");
 496
 497         /* report dump performance, avoid division through zero */
 498         if (tend_writing - tstart_writing == 0)
 499                 msg("finished in less than a second\n");
 500         else
 501                 msg("finished in %ld seconds, throughput %ld KBytes/sec\n",
 502                     (long)(tend_writing - tstart_writing),
 503                     spcl.c_tapea / (tend_writing - tstart_writing));
 504
 505         putdumptime();
 506         trewind();
 507         broadcast("DUMP IS DONE!\a\a\n");
 508         msg("DUMP IS DONE\n");
 509         Exit(X_FINOK);
 510         /* NOTREACHED */
 511 }
 512
 513 static void
 514 usage(void)
 515 {
 516         fprintf(stderr,
 517                 "usage: dump [-0123456789ac"
 518 #ifdef KERBEROS
 519                 "k"
 520 #endif
 521                 "nSu] [-B records] [-b blocksize] [-D dumpdates]\n"
 522                 "            [-d density] [-f file ] [-h level] [-s feet]\n"
 523                 "            [-T date] [-C cachesizeMB] filesystem\n"
 524                 "       dump [-W | -w]\n");
 525         exit(X_STARTUP);
 526 }
 527
 528 /*
 529  * Pick up a numeric argument.  It must be nonnegative and in the given
 530  * range (except that a vmax of 0 means unlimited).
 531  */
 532 static long
 533 numarg(const char *meaning, long vmin, long vmax)
 534 {
 535         char *p;
 536         long val;
 537
 538         val = strtol(optarg, &p, 10);
 539         if (*p)
 540                 errx(1, "illegal %s -- %s", meaning, optarg);
 541         if (val < vmin || (vmax && val > vmax))
 542                 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax);
 543         return (val);
 544 }
 545
 546 void
 547 sig(int signo)
 548 {
 549         switch(signo) {
 550         case SIGALRM:
 551         case SIGBUS:
 552         case SIGFPE:
 553         case SIGHUP:
 554         case SIGTERM:
 555         case SIGTRAP:
 556                 if (pipeout)
 557                         quit("Signal on pipe: cannot recover\n");
 558                 msg("Rewriting attempted as response to unknown signal.\n");
 559                 fflush(stderr);
 560                 fflush(stdout);
 561                 close_rewind();
 562                 exit(X_REWRITE);
 563                 /* NOTREACHED */
 564         case SIGSEGV:
 565                 msg("SIGSEGV: ABORTING!\n");
 566                 signal(SIGSEGV, SIG_DFL);
 567                 kill(0, SIGSEGV);
 568                 /* NOTREACHED */
 569         }
 570 }
 571
 572 char *
 573 rawname(char *cp)
 574 {
 575         static char rawbuf[MAXPATHLEN];
 576         char *dp;
 577         struct stat sb;
 578
 579         if (stat(cp, &sb) == 0) {
 580                 /*
 581                  * If the name already refers to a raw device, return
 582                  * it immediately without tampering.
 583                  */
 584                 if ((sb.st_mode & S_IFMT) == S_IFCHR)
 585                         return (cp);
 586         }
 587
 588         dp = strrchr(cp, '/');
 589
 590         if (dp == NULL)
 591                 return (NULL);
 592         *dp = '\0';
 593         strncpy(rawbuf, cp, MAXPATHLEN - 1);
 594         rawbuf[MAXPATHLEN-1] = '\0';
 595         *dp = '/';
 596         strncat(rawbuf, "/r", MAXPATHLEN - 1 - strlen(rawbuf));
 597         strncat(rawbuf, dp + 1, MAXPATHLEN - 1 - strlen(rawbuf));
 598         return (rawbuf);
 599 }
 600
 601 /*
 602  * obsolete --
 603  *      Change set of key letters and ordered arguments into something
 604  *      getopt(3) will like.
 605  */
 606 static void
 607 obsolete(int *argcp, char ***argvp)
 608 {
 609         int argc, flags;
 610         char *ap, **argv, *flagsp, **nargv, *p;
 611
 612         /* Setup. */
 613         argv = *argvp;
 614         argc = *argcp;
 615
 616         /* Return if no arguments or first argument has leading dash. */
 617         ap = argv[1];
 618         if (argc == 1 || *ap == '-')
 619                 return;
 620
 621         /* Allocate space for new arguments. */
 622         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 623             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 624                 err(1, NULL);
 625
 626         *nargv++ = *argv;
 627         argv += 2;
 628
 629         for (flags = 0; *ap; ++ap) {
 630                 switch (*ap) {
 631                 case 'B':
 632                 case 'b':
 633                 case 'd':
 634                 case 'f':
 635                 case 'D':
 636                 case 'C':
 637                 case 'h':
 638                 case 's':
 639                 case 'T':
 640                         if (*argv == NULL) {
 641                                 warnx("option requires an argument -- %c", *ap);
 642                                 usage();
 643                         }
 644                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 645                                 err(1, NULL);
 646                         nargv[0][0] = '-';
 647                         nargv[0][1] = *ap;
 648                         strcpy(&nargv[0][2], *argv);
 649                         ++argv;
 650                         ++nargv;
 651                         break;
 652                 default:
 653                         if (!flags) {
 654                                 *p++ = '-';
 655                                 flags = 1;
 656                         }
 657                         *p++ = *ap;
 658                         break;
 659                 }
 660         }
 661
 662         /* Terminate flags. */
 663         if (flags) {
 664                 *p = '\0';
 665                 *nargv++ = flagsp;
 666         }
 667
 668         /* Copy remaining arguments. */
 669         while ((*nargv++ = *argv++));
 670
 671         /* Update argument count. */
 672         *argcp = nargv - *argvp - 1;
 673 }