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. 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 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/1/95"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/time.h> 51 #include <sys/disklabel.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ffs/fs.h> 55 56 #include <protocols/dumprestore.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <fcntl.h> 61 #include <fstab.h> 62 #include <inttypes.h> 63 #include <limits.h> 64 #include <signal.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <timeconv.h> 69 #include <unistd.h> 70 71 #include "dump.h" 72 #include "pathnames.h" 73 74 int notify = 0; /* notify operator flag */ 75 int blockswritten = 0; /* number of blocks written on current tape */ 76 int tapeno = 0; /* current tape number */ 77 int density = 0; /* density in bytes/0.1" " <- this is for hilit19 */ 78 int ntrec = NTREC; /* # tape blocks in each tape record */ 79 int cartridge = 0; /* Assume non-cartridge tape */ 80 int dokerberos = 0; /* Use Kerberos authentication */ 81 long dev_bsize = 1; /* recalculated below */ 82 long blocksperfile; /* output blocks per file */ 83 char *host = NULL; /* remote host (if any) */ 84 85 /* 86 * Possible superblock locations ordered from most to least likely. 87 */ 88 static int sblock_try[] = SBLOCKSEARCH; 89 90 static long numarg(const char *, long, long); 91 static void obsolete(int *, char **[]); 92 static void usage(void) __dead2; 93 94 int 95 main(int argc, char *argv[]) 96 { 97 struct stat sb; 98 ino_t ino; 99 int dirty; 100 union dinode *dp; 101 struct fstab *dt; 102 char *map; 103 int ch, mode; 104 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 105 int just_estimate = 0; 106 ino_t maxino; 107 char *tmsg; 108 109 spcl.c_date = _time_to_time64(time(NULL)); 110 111 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 112 if ((tape = getenv("TAPE")) == NULL) 113 tape = _PATH_DEFTAPE; 114 dumpdates = _PATH_DUMPDATES; 115 temp = _PATH_DTMP; 116 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 117 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 118 level = '0'; 119 120 if (argc < 2) 121 usage(); 122 123 obsolete(&argc, &argv); 124 #ifdef KERBEROS 125 #define optstring "0123456789aB:b:cd:f:h:kns:ST:uWwD:" 126 #else 127 #define optstring "0123456789aB:b:cd:f:h:ns:ST:uWwD:" 128 #endif 129 while ((ch = getopt(argc, argv, optstring)) != -1) 130 #undef optstring 131 switch (ch) { 132 /* dump level */ 133 case '0': case '1': case '2': case '3': case '4': 134 case '5': case '6': case '7': case '8': case '9': 135 level = ch; 136 break; 137 138 case 'a': /* `auto-size', Write to EOM. */ 139 unlimited = 1; 140 break; 141 142 case 'B': /* blocks per output file */ 143 blocksperfile = numarg("number of blocks per file", 144 1L, 0L); 145 break; 146 147 case 'b': /* blocks per tape write */ 148 ntrec = numarg("number of blocks per write", 149 1L, 1000L); 150 break; 151 152 case 'c': /* Tape is cart. not 9-track */ 153 cartridge = 1; 154 break; 155 156 case 'd': /* density, in bits per inch */ 157 density = numarg("density", 10L, 327670L) / 10; 158 if (density >= 625 && !bflag) 159 ntrec = HIGHDENSITYTREC; 160 break; 161 162 case 'f': /* output file */ 163 tape = optarg; 164 break; 165 166 case 'D': 167 dumpdates = optarg; 168 break; 169 170 case 'h': 171 honorlevel = numarg("honor level", 0L, 10L); 172 break; 173 174 #ifdef KERBEROS 175 case 'k': 176 dokerberos = 1; 177 break; 178 #endif 179 180 case 'n': /* notify operators */ 181 notify = 1; 182 break; 183 184 case 's': /* tape size, feet */ 185 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 186 break; 187 188 case 'S': /* exit after estimating # of tapes */ 189 just_estimate = 1; 190 break; 191 192 case 'T': /* time of last dump */ 193 spcl.c_ddate = unctime(optarg); 194 if (spcl.c_ddate < 0) { 195 (void)fprintf(stderr, "bad time \"%s\"\n", 196 optarg); 197 exit(X_STARTUP); 198 } 199 Tflag = 1; 200 lastlevel = '?'; 201 break; 202 203 case 'u': /* update /etc/dumpdates */ 204 uflag = 1; 205 break; 206 207 case 'W': /* what to do */ 208 case 'w': 209 lastdump(ch); 210 exit(X_FINOK); /* do nothing else */ 211 212 default: 213 usage(); 214 } 215 argc -= optind; 216 argv += optind; 217 218 if (argc < 1) { 219 (void)fprintf(stderr, "Must specify disk or file system\n"); 220 exit(X_STARTUP); 221 } 222 disk = *argv++; 223 argc--; 224 if (argc >= 1) { 225 (void)fprintf(stderr, "Unknown arguments to dump:"); 226 while (argc--) 227 (void)fprintf(stderr, " %s", *argv++); 228 (void)fprintf(stderr, "\n"); 229 exit(X_STARTUP); 230 } 231 if (Tflag && uflag) { 232 (void)fprintf(stderr, 233 "You cannot use the T and u flags together.\n"); 234 exit(X_STARTUP); 235 } 236 if (strcmp(tape, "-") == 0) { 237 pipeout++; 238 tape = "standard output"; 239 } 240 241 if (blocksperfile) 242 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 243 else if (!unlimited) { 244 /* 245 * Determine how to default tape size and density 246 * 247 * density tape size 248 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 249 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 250 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 251 * (450*4 - slop) 252 * hilit19 hits again: " 253 */ 254 if (density == 0) 255 density = cartridge ? 100 : 160; 256 if (tsize == 0) 257 tsize = cartridge ? 1700L*120L : 2300L*120L; 258 } 259 260 if (strchr(tape, ':')) { 261 host = tape; 262 tape = strchr(host, ':'); 263 *tape++ = '\0'; 264 #ifdef RDUMP 265 if (index(tape, '\n')) { 266 (void)fprintf(stderr, "invalid characters in tape\n"); 267 exit(X_STARTUP); 268 } 269 if (rmthost(host) == 0) 270 exit(X_STARTUP); 271 #else 272 (void)fprintf(stderr, "remote dump not enabled\n"); 273 exit(X_STARTUP); 274 #endif 275 } 276 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 277 278 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 279 signal(SIGHUP, sig); 280 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 281 signal(SIGTRAP, sig); 282 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 283 signal(SIGFPE, sig); 284 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 285 signal(SIGBUS, sig); 286 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 287 signal(SIGSEGV, sig); 288 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 289 signal(SIGTERM, sig); 290 if (signal(SIGINT, interrupt) == SIG_IGN) 291 signal(SIGINT, SIG_IGN); 292 293 getfstab(); /* /etc/fstab snarfed */ 294 /* 295 * disk can be either the full special file name, 296 * the suffix of the special file name, 297 * the special name missing the leading '/', 298 * the file system name with or without the leading '/'. 299 */ 300 dt = fstabsearch(disk); 301 if (dt != NULL) { 302 disk = rawname(dt->fs_spec); 303 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 304 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 305 } else { 306 (void)strncpy(spcl.c_dev, disk, NAMELEN); 307 (void)strncpy(spcl.c_filesys, "an unlisted file system", 308 NAMELEN); 309 } 310 spcl.c_dev[NAMELEN-1]='\0'; 311 spcl.c_filesys[NAMELEN-1]='\0'; 312 (void)strcpy(spcl.c_label, "none"); 313 (void)gethostname(spcl.c_host, NAMELEN); 314 spcl.c_level = level - '0'; 315 spcl.c_type = TS_TAPE; 316 if (!Tflag) 317 getdumptime(); /* /etc/dumpdates snarfed */ 318 319 if (spcl.c_date == 0) { 320 tmsg = "the epoch\n"; 321 } else { 322 time_t t = _time64_to_time(spcl.c_date); 323 tmsg = ctime(&t); 324 } 325 msg("Date of this level %c dump: %s", level, tmsg); 326 if (spcl.c_ddate == 0) { 327 tmsg = "the epoch\n"; 328 } else { 329 time_t t = _time64_to_time(spcl.c_ddate); 330 tmsg = ctime(&t); 331 } 332 msg("Date of last level %c dump: %s", lastlevel, tmsg); 333 msg("Dumping %s ", disk); 334 if (dt != NULL) 335 msgtail("(%s) ", dt->fs_file); 336 if (host) 337 msgtail("to %s on host %s\n", tape, host); 338 else 339 msgtail("to %s\n", tape); 340 341 if ((diskfd = open(disk, O_RDONLY)) < 0) 342 err(X_STARTUP, "Cannot open %s", disk); 343 if (fstat(diskfd, &sb) != 0) 344 err(X_STARTUP, "%s: stat", disk); 345 if (S_ISDIR(sb.st_mode)) 346 errx(X_STARTUP, "%s: unknown file system", disk); 347 sync(); 348 sblock = (struct fs *)sblock_buf; 349 for (i = 0; sblock_try[i] != -1; i++) { 350 bread(sblock_try[i] >> dev_bshift, (char *) sblock, SBLOCKSIZE); 351 if ((sblock->fs_magic == FS_UFS1_MAGIC || 352 (sblock->fs_magic == FS_UFS2_MAGIC && 353 sblock->fs_sblockloc == 354 numfrags(sblock, sblock_try[i]))) && 355 sblock->fs_bsize <= MAXBSIZE && 356 sblock->fs_bsize >= sizeof(struct fs)) 357 break; 358 } 359 if (sblock_try[i] == -1) 360 quit("Cannot find file system superblock\n"); 361 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 362 dev_bshift = ffs(dev_bsize) - 1; 363 if (dev_bsize != (1 << dev_bshift)) 364 quit("dev_bsize (%ld) is not a power of 2", dev_bsize); 365 tp_bshift = ffs(TP_BSIZE) - 1; 366 if (TP_BSIZE != (1 << tp_bshift)) 367 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 368 maxino = sblock->fs_ipg * sblock->fs_ncg; 369 mapsize = roundup(howmany(maxino, CHAR_BIT), TP_BSIZE); 370 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 371 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 372 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 373 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 374 375 nonodump = spcl.c_level < honorlevel; 376 377 passno = 1; 378 setproctitle("%s: pass 1: regular files", disk); 379 msg("mapping (Pass I) [regular files]\n"); 380 anydirskipped = mapfiles(maxino, &tapesize); 381 382 passno = 2; 383 setproctitle("%s: pass 2: directories", disk); 384 msg("mapping (Pass II) [directories]\n"); 385 while (anydirskipped) { 386 anydirskipped = mapdirs(maxino, &tapesize); 387 } 388 389 if (pipeout || unlimited) { 390 tapesize += 10; /* 10 trailer blocks */ 391 msg("estimated %ld tape blocks.\n", tapesize); 392 } else { 393 double fetapes; 394 395 if (blocksperfile) 396 fetapes = (double) tapesize / blocksperfile; 397 else if (cartridge) { 398 /* Estimate number of tapes, assuming streaming stops at 399 the end of each block written, and not in mid-block. 400 Assume no erroneous blocks; this can be compensated 401 for with an artificially low tape size. */ 402 fetapes = 403 ( (double) tapesize /* blocks */ 404 * TP_BSIZE /* bytes/block */ 405 * (1.0/density) /* 0.1" / byte " */ 406 + 407 (double) tapesize /* blocks */ 408 * (1.0/ntrec) /* streaming-stops per block */ 409 * 15.48 /* 0.1" / streaming-stop " */ 410 ) * (1.0 / tsize ); /* tape / 0.1" " */ 411 } else { 412 /* Estimate number of tapes, for old fashioned 9-track 413 tape */ 414 int tenthsperirg = (density == 625) ? 3 : 7; 415 fetapes = 416 ( (double) tapesize /* blocks */ 417 * TP_BSIZE /* bytes / block */ 418 * (1.0/density) /* 0.1" / byte " */ 419 + 420 (double) tapesize /* blocks */ 421 * (1.0/ntrec) /* IRG's / block */ 422 * tenthsperirg /* 0.1" / IRG " */ 423 ) * (1.0 / tsize ); /* tape / 0.1" " */ 424 } 425 etapes = fetapes; /* truncating assignment */ 426 etapes++; 427 /* count the dumped inodes map on each additional tape */ 428 tapesize += (etapes - 1) * 429 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 430 tapesize += etapes + 10; /* headers + 10 trailer blks */ 431 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 432 tapesize, fetapes); 433 } 434 435 /* 436 * If the user only wants an estimate of the number of 437 * tapes, exit now. 438 */ 439 if (just_estimate) 440 exit(0); 441 442 /* 443 * Allocate tape buffer. 444 */ 445 if (!alloctape()) 446 quit( 447 "can't allocate tape buffers - try a smaller blocking factor.\n"); 448 449 startnewtape(1); 450 (void)time((time_t *)&(tstart_writing)); 451 dumpmap(usedinomap, TS_CLRI, maxino - 1); 452 453 passno = 3; 454 setproctitle("%s: pass 3: directories", disk); 455 msg("dumping (Pass III) [directories]\n"); 456 dirty = 0; /* XXX just to get gcc to shut up */ 457 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 458 if (((ino - 1) % CHAR_BIT) == 0) /* map is offset by 1 */ 459 dirty = *map++; 460 else 461 dirty >>= 1; 462 if ((dirty & 1) == 0) 463 continue; 464 /* 465 * Skip directory inodes deleted and maybe reallocated 466 */ 467 dp = getino(ino, &mode); 468 if (mode != IFDIR) 469 continue; 470 (void)dumpino(dp, ino); 471 } 472 473 passno = 4; 474 setproctitle("%s: pass 4: regular files", disk); 475 msg("dumping (Pass IV) [regular files]\n"); 476 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 477 if (((ino - 1) % CHAR_BIT) == 0) /* map is offset by 1 */ 478 dirty = *map++; 479 else 480 dirty >>= 1; 481 if ((dirty & 1) == 0) 482 continue; 483 /* 484 * Skip inodes deleted and reallocated as directories. 485 */ 486 dp = getino(ino, &mode); 487 if (mode == IFDIR) 488 continue; 489 (void)dumpino(dp, ino); 490 } 491 492 (void)time((time_t *)&(tend_writing)); 493 spcl.c_type = TS_END; 494 for (i = 0; i < ntrec; i++) 495 writeheader(maxino - 1); 496 if (pipeout) 497 msg("DUMP: %jd tape blocks\n", (intmax_t)spcl.c_tapea); 498 else 499 msg("DUMP: %jd tape blocks on %d volume%s\n", 500 (intmax_t)spcl.c_tapea, spcl.c_volume, 501 (spcl.c_volume == 1) ? "" : "s"); 502 503 /* report dump performance, avoid division through zero */ 504 if (tend_writing - tstart_writing == 0) 505 msg("finished in less than a second\n"); 506 else 507 msg("finished in %d seconds, throughput %jd KBytes/sec\n", 508 tend_writing - tstart_writing, (intmax_t)(spcl.c_tapea / 509 (tend_writing - tstart_writing))); 510 511 putdumptime(); 512 trewind(); 513 broadcast("DUMP IS DONE!\a\a\n"); 514 msg("DUMP IS DONE\n"); 515 Exit(X_FINOK); 516 /* NOTREACHED */ 517 } 518 519 static void 520 usage(void) 521 { 522 fprintf(stderr, 523 "usage: dump [-0123456789ac" 524 #ifdef KERBEROS 525 "k" 526 #endif 527 "nSu] [-B records] [-b blocksize] [-D dumpdates]\n" 528 " [-d density] [-f file] [-h level] [-s feet] " 529 "[-T date] filesystem\n" 530 " dump -W | -w\n"); 531 exit(X_STARTUP); 532 } 533 534 /* 535 * Pick up a numeric argument. It must be nonnegative and in the given 536 * range (except that a vmax of 0 means unlimited). 537 */ 538 static long 539 numarg(const char *meaning, long vmin, long vmax) 540 { 541 char *p; 542 long val; 543 544 val = strtol(optarg, &p, 10); 545 if (*p) 546 errx(1, "illegal %s -- %s", meaning, optarg); 547 if (val < vmin || (vmax && val > vmax)) 548 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 549 return (val); 550 } 551 552 void 553 sig(int signo) 554 { 555 switch(signo) { 556 case SIGALRM: 557 case SIGBUS: 558 case SIGFPE: 559 case SIGHUP: 560 case SIGTERM: 561 case SIGTRAP: 562 if (pipeout) 563 quit("Signal on pipe: cannot recover\n"); 564 msg("Rewriting attempted as response to unknown signal.\n"); 565 (void)fflush(stderr); 566 (void)fflush(stdout); 567 close_rewind(); 568 exit(X_REWRITE); 569 /* NOTREACHED */ 570 case SIGSEGV: 571 msg("SIGSEGV: ABORTING!\n"); 572 (void)signal(SIGSEGV, SIG_DFL); 573 (void)kill(0, SIGSEGV); 574 /* NOTREACHED */ 575 } 576 } 577 578 char * 579 rawname(char *cp) 580 { 581 static char rawbuf[MAXPATHLEN]; 582 char *dp; 583 struct stat sb; 584 585 if (stat(cp, &sb) == 0) { 586 /* 587 * If the name already refers to a raw device, return 588 * it immediately without tampering. 589 */ 590 if ((sb.st_mode & S_IFMT) == S_IFCHR) 591 return (cp); 592 } 593 594 dp = strrchr(cp, '/'); 595 596 if (dp == NULL) 597 return (NULL); 598 *dp = '\0'; 599 (void)strlcpy(rawbuf, cp, MAXPATHLEN - 1); 600 *dp = '/'; 601 (void)strlcat(rawbuf, "/r", MAXPATHLEN - 1 - strlen(rawbuf)); 602 (void)strlcat(rawbuf, dp + 1, MAXPATHLEN - 1 - strlen(rawbuf)); 603 return (rawbuf); 604 } 605 606 /* 607 * obsolete -- 608 * Change set of key letters and ordered arguments into something 609 * getopt(3) will like. 610 */ 611 static void 612 obsolete(int *argcp, char **argvp[]) 613 { 614 int argc, flags; 615 char *ap, **argv, *flagsp, **nargv, *p; 616 617 /* Setup. */ 618 argv = *argvp; 619 argc = *argcp; 620 621 /* Return if no arguments or first argument has leading dash. */ 622 ap = argv[1]; 623 if (argc == 1 || *ap == '-') 624 return; 625 626 /* Allocate space for new arguments. */ 627 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 628 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 629 err(1, NULL); 630 631 *nargv++ = *argv; 632 argv += 2; 633 634 for (flags = 0; *ap; ++ap) { 635 switch (*ap) { 636 case 'B': 637 case 'b': 638 case 'd': 639 case 'f': 640 case 'D': 641 case 'h': 642 case 's': 643 case 'T': 644 if (*argv == NULL) { 645 warnx("option requires an argument -- %c", *ap); 646 usage(); 647 } 648 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 649 err(1, NULL); 650 nargv[0][0] = '-'; 651 nargv[0][1] = *ap; 652 (void)strcpy(&nargv[0][2], *argv); 653 ++argv; 654 ++nargv; 655 break; 656 default: 657 if (!flags) { 658 *p++ = '-'; 659 flags = 1; 660 } 661 *p++ = *ap; 662 break; 663 } 664 } 665 666 /* Terminate flags. */ 667 if (flags) { 668 *p = '\0'; 669 *nargv++ = flagsp; 670 } 671 672 /* Copy remaining arguments. */ 673 while ((*nargv++ = *argv++)); 674 675 /* Update argument count. */ 676 *argcp = nargv - *argvp - 1; 677 } 678