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: src/sbin/dump/main.c,v 1.20.2.9 2003/01/25 18:54:59 dillon Exp $"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/time.h> 51 #ifdef sunos 52 #include <sys/vnode.h> 53 54 #include <ufs/inode.h> 55 #include <ufs/fs.h> 56 #else 57 #include <ufs/ufs/dinode.h> 58 #include <ufs/ffs/fs.h> 59 #endif 60 61 #include <protocols/dumprestore.h> 62 63 #include <ctype.h> 64 #include <err.h> 65 #include <fcntl.h> 66 #include <fstab.h> 67 #include <signal.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <unistd.h> 72 73 #include "dump.h" 74 #include "pathnames.h" 75 76 #ifndef SBOFF 77 #define SBOFF (SBLOCK * DEV_BSIZE) 78 #endif 79 80 int notify = 0; /* notify operator flag */ 81 int blockswritten = 0; /* number of blocks written on current tape */ 82 int tapeno = 0; /* current tape number */ 83 int density = 0; /* density in bytes/0.1" " <- this is for hilit19 */ 84 int ntrec = NTREC; /* # tape blocks in each tape record */ 85 int cartridge = 0; /* Assume non-cartridge tape */ 86 int dokerberos = 0; /* Use Kerberos authentication */ 87 int cachesize = 0; /* block cache size (in bytes) */ 88 long dev_bsize = 1; /* recalculated below */ 89 long blocksperfile; /* output blocks per file */ 90 char *host = NULL; /* remote host (if any) */ 91 92 static long numarg __P((char *, long, long)); 93 static void obsolete __P((int *, char **[])); 94 static void usage __P((void)); 95 96 int 97 main(argc, argv) 98 int argc; 99 char *argv[]; 100 { 101 struct stat sb; 102 register ino_t ino; 103 register int dirty; 104 register struct dinode *dp; 105 register struct fstab *dt; 106 register char *map; 107 register int ch; 108 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 109 int just_estimate = 0; 110 ino_t maxino; 111 112 spcl.c_date = 0; 113 (void)time((time_t *)&spcl.c_date); 114 115 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 116 if ((tape = getenv("TAPE")) == NULL) 117 tape = _PATH_DEFTAPE; 118 dumpdates = _PATH_DUMPDATES; 119 temp = _PATH_DTMP; 120 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) 121 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n"); 122 level = '0'; 123 124 if (argc < 2) 125 usage(); 126 127 obsolete(&argc, &argv); 128 #ifdef KERBEROS 129 #define optstring "0123456789aB:b:cd:f:h:kns:ST:uWwD:C:" 130 #else 131 #define optstring "0123456789aB:b:cd:f:h:ns:ST:uWwD:C:" 132 #endif 133 while ((ch = getopt(argc, argv, optstring)) != -1) 134 #undef optstring 135 switch (ch) { 136 /* dump level */ 137 case '0': case '1': case '2': case '3': case '4': 138 case '5': case '6': case '7': case '8': case '9': 139 level = ch; 140 break; 141 142 case 'a': /* `auto-size', Write to EOM. */ 143 unlimited = 1; 144 break; 145 146 case 'B': /* blocks per output file */ 147 blocksperfile = numarg("number of blocks per file", 148 1L, 0L); 149 break; 150 151 case 'b': /* blocks per tape write */ 152 ntrec = numarg("number of blocks per write", 153 1L, 1000L); 154 break; 155 156 case 'c': /* Tape is cart. not 9-track */ 157 cartridge = 1; 158 break; 159 160 case 'd': /* density, in bits per inch */ 161 density = numarg("density", 10L, 327670L) / 10; 162 if (density >= 625 && !bflag) 163 ntrec = HIGHDENSITYTREC; 164 break; 165 166 case 'f': /* output file */ 167 tape = optarg; 168 break; 169 170 case 'D': 171 dumpdates = optarg; 172 break; 173 174 case 'C': 175 cachesize = numarg("cachesize", 0, 0) * 1024 * 1024; 176 break; 177 178 case 'h': 179 honorlevel = numarg("honor level", 0L, 10L); 180 break; 181 182 #ifdef KERBEROS 183 case 'k': 184 dokerberos = 1; 185 break; 186 #endif 187 188 case 'n': /* notify operators */ 189 notify = 1; 190 break; 191 192 case 's': /* tape size, feet */ 193 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 194 break; 195 196 case 'S': /* exit after estimating # of tapes */ 197 just_estimate = 1; 198 break; 199 200 case 'T': /* time of last dump */ 201 spcl.c_ddate = unctime(optarg); 202 if (spcl.c_ddate < 0) { 203 (void)fprintf(stderr, "bad time \"%s\"\n", 204 optarg); 205 exit(X_STARTUP); 206 } 207 Tflag = 1; 208 lastlevel = '?'; 209 break; 210 211 case 'u': /* update /etc/dumpdates */ 212 uflag = 1; 213 break; 214 215 case 'W': /* what to do */ 216 case 'w': 217 lastdump(ch); 218 exit(X_FINOK); /* do nothing else */ 219 220 default: 221 usage(); 222 } 223 argc -= optind; 224 argv += optind; 225 226 if (argc < 1) { 227 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 228 exit(X_STARTUP); 229 } 230 disk = *argv++; 231 argc--; 232 if (argc >= 1) { 233 (void)fprintf(stderr, "Unknown arguments to dump:"); 234 while (argc--) 235 (void)fprintf(stderr, " %s", *argv++); 236 (void)fprintf(stderr, "\n"); 237 exit(X_STARTUP); 238 } 239 if (Tflag && uflag) { 240 (void)fprintf(stderr, 241 "You cannot use the T and u flags together.\n"); 242 exit(X_STARTUP); 243 } 244 if (strcmp(tape, "-") == 0) { 245 pipeout++; 246 tape = "standard output"; 247 } 248 249 if (blocksperfile) 250 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 251 else if (!unlimited) { 252 /* 253 * Determine how to default tape size and density 254 * 255 * density tape size 256 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 257 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 258 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 259 * (450*4 - slop) 260 * hilit19 hits again: " 261 */ 262 if (density == 0) 263 density = cartridge ? 100 : 160; 264 if (tsize == 0) 265 tsize = cartridge ? 1700L*120L : 2300L*120L; 266 } 267 268 if (strchr(tape, ':')) { 269 host = tape; 270 tape = strchr(host, ':'); 271 *tape++ = '\0'; 272 #ifdef RDUMP 273 if (index(tape, '\n')) { 274 (void)fprintf(stderr, "invalid characters in tape\n"); 275 exit(X_STARTUP); 276 } 277 if (rmthost(host) == 0) 278 exit(X_STARTUP); 279 #else 280 (void)fprintf(stderr, "remote dump not enabled\n"); 281 exit(X_STARTUP); 282 #endif 283 } 284 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */ 285 286 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 287 signal(SIGHUP, sig); 288 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 289 signal(SIGTRAP, sig); 290 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 291 signal(SIGFPE, sig); 292 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 293 signal(SIGBUS, sig); 294 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 295 signal(SIGSEGV, sig); 296 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 297 signal(SIGTERM, sig); 298 if (signal(SIGINT, interrupt) == SIG_IGN) 299 signal(SIGINT, SIG_IGN); 300 301 getfstab(); /* /etc/fstab snarfed */ 302 /* 303 * disk can be either the full special file name, 304 * the suffix of the special file name, 305 * the special name missing the leading '/', 306 * the file system name with or without the leading '/'. 307 */ 308 dt = fstabsearch(disk); 309 if (dt != NULL) { 310 disk = rawname(dt->fs_spec); 311 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 312 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 313 } else { 314 (void)strncpy(spcl.c_dev, disk, NAMELEN); 315 (void)strncpy(spcl.c_filesys, "an unlisted file system", 316 NAMELEN); 317 } 318 spcl.c_dev[NAMELEN-1]='\0'; 319 spcl.c_filesys[NAMELEN-1]='\0'; 320 (void)strcpy(spcl.c_label, "none"); 321 (void)gethostname(spcl.c_host, NAMELEN); 322 spcl.c_level = level - '0'; 323 spcl.c_type = TS_TAPE; 324 if (!Tflag) 325 getdumptime(); /* /etc/dumpdates snarfed */ 326 327 msg("Date of this level %c dump: %s", level, 328 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 329 msg("Date of last level %c dump: %s", lastlevel, 330 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 331 msg("Dumping %s ", disk); 332 if (dt != NULL) 333 msgtail("(%s) ", dt->fs_file); 334 if (host) 335 msgtail("to %s on host %s\n", tape, host); 336 else 337 msgtail("to %s\n", tape); 338 339 if ((diskfd = open(disk, O_RDONLY)) < 0) 340 err(X_STARTUP, "Cannot open %s", disk); 341 if (fstat(diskfd, &sb) != 0) 342 err(X_STARTUP, "%s: stat", disk); 343 if (S_ISDIR(sb.st_mode)) 344 errx(X_STARTUP, "%s: unknown file system", disk); 345 sync(); 346 sblock = (struct fs *)sblock_buf; 347 bread(SBOFF, (char *) sblock, SBSIZE); 348 if (sblock->fs_magic != FS_MAGIC) 349 quit("bad sblock magic number\n"); 350 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 351 dev_bshift = ffs(dev_bsize) - 1; 352 if (dev_bsize != (1 << dev_bshift)) 353 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 354 tp_bshift = ffs(TP_BSIZE) - 1; 355 if (TP_BSIZE != (1 << tp_bshift)) 356 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 357 #ifdef FS_44INODEFMT 358 if (sblock->fs_inodefmt >= FS_44INODEFMT) 359 spcl.c_flags |= DR_NEWINODEFMT; 360 #endif 361 maxino = sblock->fs_ipg * sblock->fs_ncg; 362 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 363 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 364 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 365 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 366 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 367 368 nonodump = spcl.c_level < honorlevel; 369 370 passno = 1; 371 setproctitle("%s: pass 1: regular files", disk); 372 msg("mapping (Pass I) [regular files]\n"); 373 anydirskipped = mapfiles(maxino, &tapesize); 374 375 passno = 2; 376 setproctitle("%s: pass 2: directories", disk); 377 msg("mapping (Pass II) [directories]\n"); 378 while (anydirskipped) { 379 anydirskipped = mapdirs(maxino, &tapesize); 380 } 381 382 if (pipeout || unlimited) { 383 tapesize += 10; /* 10 trailer blocks */ 384 msg("estimated %ld tape blocks.\n", tapesize); 385 } else { 386 double fetapes; 387 388 if (blocksperfile) 389 fetapes = (double) tapesize / blocksperfile; 390 else if (cartridge) { 391 /* Estimate number of tapes, assuming streaming stops at 392 the end of each block written, and not in mid-block. 393 Assume no erroneous blocks; this can be compensated 394 for with an artificially low tape size. */ 395 fetapes = 396 ( (double) tapesize /* blocks */ 397 * TP_BSIZE /* bytes/block */ 398 * (1.0/density) /* 0.1" / byte " */ 399 + 400 (double) tapesize /* blocks */ 401 * (1.0/ntrec) /* streaming-stops per block */ 402 * 15.48 /* 0.1" / streaming-stop " */ 403 ) * (1.0 / tsize ); /* tape / 0.1" " */ 404 } else { 405 /* Estimate number of tapes, for old fashioned 9-track 406 tape */ 407 int tenthsperirg = (density == 625) ? 3 : 7; 408 fetapes = 409 ( (double) tapesize /* blocks */ 410 * TP_BSIZE /* bytes / block */ 411 * (1.0/density) /* 0.1" / byte " */ 412 + 413 (double) tapesize /* blocks */ 414 * (1.0/ntrec) /* IRG's / block */ 415 * tenthsperirg /* 0.1" / IRG " */ 416 ) * (1.0 / tsize ); /* tape / 0.1" " */ 417 } 418 etapes = fetapes; /* truncating assignment */ 419 etapes++; 420 /* count the dumped inodes map on each additional tape */ 421 tapesize += (etapes - 1) * 422 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 423 tapesize += etapes + 10; /* headers + 10 trailer blks */ 424 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 425 tapesize, fetapes); 426 } 427 428 /* 429 * If the user only wants an estimate of the number of 430 * tapes, exit now. 431 */ 432 if (just_estimate) 433 exit(0); 434 435 /* 436 * Allocate tape buffer. 437 */ 438 if (!alloctape()) 439 quit( 440 "can't allocate tape buffers - try a smaller blocking factor.\n"); 441 442 startnewtape(1); 443 (void)time((time_t *)&(tstart_writing)); 444 dumpmap(usedinomap, TS_CLRI, maxino - 1); 445 446 passno = 3; 447 setproctitle("%s: pass 3: directories", disk); 448 msg("dumping (Pass III) [directories]\n"); 449 dirty = 0; /* XXX just to get gcc to shut up */ 450 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 451 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 452 dirty = *map++; 453 else 454 dirty >>= 1; 455 if ((dirty & 1) == 0) 456 continue; 457 /* 458 * Skip directory inodes deleted and maybe reallocated 459 */ 460 dp = getino(ino); 461 if ((dp->di_mode & IFMT) != IFDIR) 462 continue; 463 (void)dumpino(dp, ino); 464 } 465 466 passno = 4; 467 setproctitle("%s: pass 4: regular files", disk); 468 msg("dumping (Pass IV) [regular files]\n"); 469 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 470 int mode; 471 472 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 473 dirty = *map++; 474 else 475 dirty >>= 1; 476 if ((dirty & 1) == 0) 477 continue; 478 /* 479 * Skip inodes deleted and reallocated as directories. 480 */ 481 dp = getino(ino); 482 mode = dp->di_mode & IFMT; 483 if (mode == IFDIR) 484 continue; 485 (void)dumpino(dp, ino); 486 } 487 488 (void)time((time_t *)&(tend_writing)); 489 spcl.c_type = TS_END; 490 for (i = 0; i < ntrec; i++) 491 writeheader(maxino - 1); 492 if (pipeout) 493 msg("DUMP: %ld tape blocks\n", spcl.c_tapea); 494 else 495 msg("DUMP: %ld tape blocks on %d volume%s\n", 496 spcl.c_tapea, spcl.c_volume, 497 (spcl.c_volume == 1) ? "" : "s"); 498 499 /* report dump performance, avoid division through zero */ 500 if (tend_writing - tstart_writing == 0) 501 msg("finished in less than a second\n"); 502 else 503 msg("finished in %d seconds, throughput %d KBytes/sec\n", 504 tend_writing - tstart_writing, 505 spcl.c_tapea / (tend_writing - tstart_writing)); 506 507 putdumptime(); 508 trewind(); 509 broadcast("DUMP IS DONE!\a\a\n"); 510 msg("DUMP IS DONE\n"); 511 Exit(X_FINOK); 512 /* NOTREACHED */ 513 } 514 515 static void 516 usage() 517 { 518 fprintf(stderr, 519 "usage: dump [-0123456789ac" 520 #ifdef KERBEROS 521 "k" 522 #endif 523 "nSu] [-B records] [-b blocksize] [-D dumpdates]\n" 524 " [-d density] [-f file ] [-h level] [-s feet]\n" 525 " [-T date] [-C cachesizeMB] filesystem\n" 526 " dump [-W | -w]\n"); 527 exit(X_STARTUP); 528 } 529 530 /* 531 * Pick up a numeric argument. It must be nonnegative and in the given 532 * range (except that a vmax of 0 means unlimited). 533 */ 534 static long 535 numarg(meaning, vmin, vmax) 536 char *meaning; 537 long vmin, vmax; 538 { 539 char *p; 540 long val; 541 542 val = strtol(optarg, &p, 10); 543 if (*p) 544 errx(1, "illegal %s -- %s", meaning, optarg); 545 if (val < vmin || (vmax && val > vmax)) 546 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 547 return (val); 548 } 549 550 void 551 sig(signo) 552 int signo; 553 { 554 switch(signo) { 555 case SIGALRM: 556 case SIGBUS: 557 case SIGFPE: 558 case SIGHUP: 559 case SIGTERM: 560 case SIGTRAP: 561 if (pipeout) 562 quit("Signal on pipe: cannot recover\n"); 563 msg("Rewriting attempted as response to unknown signal.\n"); 564 (void)fflush(stderr); 565 (void)fflush(stdout); 566 close_rewind(); 567 exit(X_REWRITE); 568 /* NOTREACHED */ 569 case SIGSEGV: 570 msg("SIGSEGV: ABORTING!\n"); 571 (void)signal(SIGSEGV, SIG_DFL); 572 (void)kill(0, SIGSEGV); 573 /* NOTREACHED */ 574 } 575 } 576 577 char * 578 rawname(cp) 579 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)strncpy(rawbuf, cp, MAXPATHLEN - 1); 600 rawbuf[MAXPATHLEN-1] = '\0'; 601 *dp = '/'; 602 (void)strncat(rawbuf, "/r", MAXPATHLEN - 1 - strlen(rawbuf)); 603 (void)strncat(rawbuf, dp + 1, MAXPATHLEN - 1 - strlen(rawbuf)); 604 return (rawbuf); 605 } 606 607 /* 608 * obsolete -- 609 * Change set of key letters and ordered arguments into something 610 * getopt(3) will like. 611 */ 612 static void 613 obsolete(argcp, argvp) 614 int *argcp; 615 char **argvp[]; 616 { 617 int argc, flags; 618 char *ap, **argv, *flagsp, **nargv, *p; 619 620 /* Setup. */ 621 argv = *argvp; 622 argc = *argcp; 623 624 /* Return if no arguments or first argument has leading dash. */ 625 ap = argv[1]; 626 if (argc == 1 || *ap == '-') 627 return; 628 629 /* Allocate space for new arguments. */ 630 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 631 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 632 err(1, NULL); 633 634 *nargv++ = *argv; 635 argv += 2; 636 637 for (flags = 0; *ap; ++ap) { 638 switch (*ap) { 639 case 'B': 640 case 'b': 641 case 'd': 642 case 'f': 643 case 'D': 644 case 'C': 645 case 'h': 646 case 's': 647 case 'T': 648 if (*argv == NULL) { 649 warnx("option requires an argument -- %c", *ap); 650 usage(); 651 } 652 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 653 err(1, NULL); 654 nargv[0][0] = '-'; 655 nargv[0][1] = *ap; 656 (void)strcpy(&nargv[0][2], *argv); 657 ++argv; 658 ++nargv; 659 break; 660 default: 661 if (!flags) { 662 *p++ = '-'; 663 flags = 1; 664 } 665 *p++ = *ap; 666 break; 667 } 668 } 669 670 /* Terminate flags. */ 671 if (flags) { 672 *p = '\0'; 673 *nargv++ = flagsp; 674 } 675 676 /* Copy remaining arguments. */ 677 while ((*nargv++ = *argv++)); 678 679 /* Update argument count. */ 680 *argcp = nargv - *argvp - 1; 681 } 682