1 /* $NetBSD: main.c,v 1.17 1997/09/18 03:03:56 lukem 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/1/95"; 45 #else 46 __RCSID("$NetBSD: main.c,v 1.17 1997/09/18 03:03:56 lukem Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <sys/stat.h> 53 #include <sys/mount.h> 54 55 #ifdef sunos 56 #include <sys/vnode.h> 57 58 #include <ufs/inode.h> 59 #include <ufs/fs.h> 60 #else 61 #include <ufs/ufs/dinode.h> 62 #include <ufs/ffs/fs.h> 63 #endif 64 65 #include <protocols/dumprestore.h> 66 67 #include <ctype.h> 68 #include <err.h> 69 #include <errno.h> 70 #include <fcntl.h> 71 #include <fstab.h> 72 #include <signal.h> 73 #include <stdio.h> 74 #include <stdlib.h> 75 #include <string.h> 76 #include <time.h> 77 #include <unistd.h> 78 79 #include "dump.h" 80 #include "pathnames.h" 81 82 #ifndef SBOFF 83 #define SBOFF (SBLOCK * DEV_BSIZE) 84 #endif 85 86 int notify = 0; /* notify operator flag */ 87 int blockswritten = 0; /* number of blocks written on current tape */ 88 int tapeno = 0; /* current tape number */ 89 int density = 0; /* density in bytes/0.1" */ 90 int ntrec = NTREC; /* # tape blocks in each tape record */ 91 int cartridge = 0; /* Assume non-cartridge tape */ 92 long dev_bsize = 1; /* recalculated below */ 93 long blocksperfile = 0; /* output blocks per file */ 94 char *host = NULL; /* remote host (if any) */ 95 96 int main __P((int, char *[])); 97 static long numarg __P((char *, long, long)); 98 static void obsolete __P((int *, char **[])); 99 static void usage __P((void)); 100 101 int 102 main(argc, argv) 103 int argc; 104 char *argv[]; 105 { 106 ino_t ino; 107 int dirty; 108 struct dinode *dp; 109 struct fstab *dt; 110 char *map; 111 int ch; 112 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; 113 ino_t maxino; 114 time_t tnow; 115 int dirlist; 116 char *toplevel; 117 int just_estimate = 0; 118 119 spcl.c_date = 0; 120 (void)time((time_t *)&spcl.c_date); 121 122 tsize = 0; /* Default later, based on 'c' option for cart tapes */ 123 if ((tape = getenv("TAPE")) == NULL) 124 tape = _PATH_DEFTAPE; 125 dumpdates = _PATH_DUMPDATES; 126 temp = _PATH_DTMP; 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'; 130 131 if (argc < 2) 132 usage(); 133 134 obsolete(&argc, &argv); 135 while ((ch = getopt(argc, argv, 136 "0123456789B:b:cd:f:h:ns:ST:uWw")) != -1) 137 switch (ch) { 138 /* dump level */ 139 case '0': case '1': case '2': case '3': case '4': 140 case '5': case '6': case '7': case '8': case '9': 141 level = ch; 142 break; 143 144 case 'B': /* blocks per output file */ 145 blocksperfile = numarg("blocks per file", 1L, 0L); 146 break; 147 148 case 'b': /* blocks per tape write */ 149 ntrec = numarg("blocks per write", 1L, 1000L); 150 bflag = 1; 151 break; 152 153 case 'c': /* Tape is cart. not 9-track */ 154 cartridge = 1; 155 break; 156 157 case 'd': /* density, in bits per inch */ 158 density = numarg("density", 10L, 327670L) / 10; 159 if (density >= 625 && !bflag) 160 ntrec = HIGHDENSITYTREC; 161 break; 162 163 case 'f': /* output file */ 164 tape = optarg; 165 break; 166 167 case 'h': 168 honorlevel = numarg("honor level", 0L, 10L); 169 break; 170 171 case 'n': /* notify operators */ 172 notify = 1; 173 break; 174 175 case 's': /* tape size, feet */ 176 tsize = numarg("tape size", 1L, 0L) * 12 * 10; 177 break; 178 179 case 'S': /* exit after estimating # of tapes */ 180 just_estimate = 1; 181 break; 182 183 case 'T': /* time of last dump */ 184 spcl.c_ddate = unctime(optarg); 185 if (spcl.c_ddate < 0) { 186 (void)fprintf(stderr, "bad time \"%s\"\n", 187 optarg); 188 exit(X_ABORT); 189 } 190 Tflag = 1; 191 lastlevel = '?'; 192 break; 193 194 case 'u': /* update /etc/dumpdates */ 195 uflag = 1; 196 break; 197 198 case 'W': /* what to do */ 199 case 'w': 200 lastdump(ch); 201 exit(0); /* do nothing else */ 202 203 default: 204 usage(); 205 } 206 argc -= optind; 207 argv += optind; 208 209 if (argc < 1) { 210 (void)fprintf(stderr, "Must specify disk or filesystem\n"); 211 exit(X_ABORT); 212 } 213 214 /* 215 * determine if disk is a subdirectory, and setup appropriately 216 */ 217 dirlist = 0; 218 toplevel = NULL; 219 for (i = 0; i < argc; i++) { 220 struct stat sb; 221 struct statfs fsbuf; 222 223 if (lstat(argv[i], &sb) == -1) { 224 msg("Cannot lstat %s: %s\n", argv[i], strerror(errno)); 225 exit(X_ABORT); 226 } 227 if (!S_ISDIR(sb.st_mode) && !S_ISREG(sb.st_mode)) 228 break; 229 if (statfs(argv[i], &fsbuf) == -1) { 230 msg("Cannot statfs %s: %s\n", argv[i], strerror(errno)); 231 exit(X_ABORT); 232 } 233 if (strcmp(argv[i], fsbuf.f_mntonname) == 0) { 234 if (dirlist != 0) { 235 msg("Can't dump a mountpoint and a filelist\n"); 236 exit(X_ABORT); 237 } 238 break; /* exit if sole mountpoint */ 239 } 240 if (!disk) { 241 if ((toplevel = strdup(fsbuf.f_mntonname)) == NULL) { 242 msg("Cannot malloc diskname\n"); 243 exit(X_ABORT); 244 } 245 disk = toplevel; 246 if (uflag) { 247 msg("Ignoring u flag for subdir dump\n"); 248 uflag = 0; 249 } 250 if (level > '0') { 251 msg("Subdir dump is done at level 0\n"); 252 level = '0'; 253 } 254 msg("Dumping sub files/directories from %s\n", disk); 255 } else { 256 if (strcmp(disk, fsbuf.f_mntonname) != 0) { 257 msg("%s is not on %s\n", argv[i], disk); 258 exit(X_ABORT); 259 } 260 } 261 msg("Dumping file/directory %s\n", argv[i]); 262 dirlist++; 263 } 264 if (dirlist == 0) { 265 disk = *argv++; 266 if (argc != 1) { 267 (void)fprintf(stderr, "Excess arguments to dump:"); 268 while (--argc) 269 (void)fprintf(stderr, " %s", *argv++); 270 (void)fprintf(stderr, "\n"); 271 exit(X_ABORT); 272 } 273 } 274 if (Tflag && uflag) { 275 (void)fprintf(stderr, 276 "You cannot use the T and u flags together.\n"); 277 exit(X_ABORT); 278 } 279 if (strcmp(tape, "-") == 0) { 280 pipeout++; 281 tape = "standard output"; 282 } 283 284 if (blocksperfile) 285 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 286 else { 287 /* 288 * Determine how to default tape size and density 289 * 290 * density tape size 291 * 9-track 1600 bpi (160 bytes/.1") 2300 ft. 292 * 9-track 6250 bpi (625 bytes/.1") 2300 ft. 293 * cartridge 8000 bpi (100 bytes/.1") 1700 ft. 294 * (450*4 - slop) 295 */ 296 if (density == 0) 297 density = cartridge ? 100 : 160; 298 if (tsize == 0) 299 tsize = cartridge ? 1700L*120L : 2300L*120L; 300 } 301 302 if (strchr(tape, ':')) { 303 host = tape; 304 tape = strchr(host, ':'); 305 *tape++ = '\0'; 306 #ifdef RDUMP 307 if (rmthost(host) == 0) 308 exit(X_ABORT); 309 #else 310 (void)fprintf(stderr, "remote dump not enabled\n"); 311 exit(X_ABORT); 312 #endif 313 } 314 315 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) 316 signal(SIGHUP, sig); 317 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN) 318 signal(SIGTRAP, sig); 319 if (signal(SIGFPE, SIG_IGN) != SIG_IGN) 320 signal(SIGFPE, sig); 321 if (signal(SIGBUS, SIG_IGN) != SIG_IGN) 322 signal(SIGBUS, sig); 323 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) 324 signal(SIGSEGV, sig); 325 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) 326 signal(SIGTERM, sig); 327 if (signal(SIGINT, interrupt) == SIG_IGN) 328 signal(SIGINT, SIG_IGN); 329 330 set_operators(); /* /etc/group snarfed */ 331 getfstab(); /* /etc/fstab snarfed */ 332 333 /* 334 * disk can be either the full special file name, 335 * the suffix of the special file name, 336 * the special name missing the leading '/', 337 * the file system name with or without the leading '/'. 338 */ 339 dt = fstabsearch(disk); 340 if (dt != NULL) { 341 disk = rawname(dt->fs_spec); 342 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN); 343 if (dirlist != 0) 344 (void)snprintf(spcl.c_filesys, NAMELEN, 345 "a subset of %s", dt->fs_file); 346 else 347 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN); 348 } else { 349 (void)strncpy(spcl.c_dev, disk, NAMELEN); 350 (void)strncpy(spcl.c_filesys, "an unlisted file system", 351 NAMELEN); 352 } 353 (void)strncpy(spcl.c_label, "none", sizeof(spcl.c_label) - 1); 354 (void)gethostname(spcl.c_host, NAMELEN); 355 spcl.c_level = level - '0'; 356 spcl.c_type = TS_TAPE; 357 if (!Tflag) 358 getdumptime(); /* /etc/dumpdates snarfed */ 359 360 msg("Date of this level %c dump: %s", level, 361 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 362 msg("Date of last level %c dump: %s", lastlevel, 363 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate)); 364 msg("Dumping "); 365 if (dt != NULL && dirlist != 0) 366 msgtail("a subset of "); 367 msgtail("%s (%s) ", disk, spcl.c_filesys); 368 if (host) 369 msgtail("to %s on host %s\n", tape, host); 370 else 371 msgtail("to %s\n", tape); 372 373 if ((diskfd = open(disk, O_RDONLY)) < 0) { 374 msg("Cannot open %s\n", disk); 375 exit(X_ABORT); 376 } 377 sync(); 378 sblock = (struct fs *)sblock_buf; 379 bread(SBOFF, (char *) sblock, SBSIZE); 380 if (sblock->fs_magic != FS_MAGIC) 381 quit("bad sblock magic number\n"); 382 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 383 dev_bshift = ffs(dev_bsize) - 1; 384 if (dev_bsize != (1 << dev_bshift)) 385 quit("dev_bsize (%d) is not a power of 2", dev_bsize); 386 tp_bshift = ffs(TP_BSIZE) - 1; 387 if (TP_BSIZE != (1 << tp_bshift)) 388 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE); 389 #ifdef FS_44INODEFMT 390 if (sblock->fs_inodefmt >= FS_44INODEFMT) 391 spcl.c_flags |= DR_NEWINODEFMT; 392 #endif 393 maxino = sblock->fs_ipg * sblock->fs_ncg; 394 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); 395 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 396 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char)); 397 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char)); 398 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 399 400 nonodump = spcl.c_level < honorlevel; 401 402 (void)signal(SIGINFO, statussig); 403 404 msg("mapping (Pass I) [regular files]\n"); 405 anydirskipped = mapfiles(maxino, &tapesize, toplevel, 406 (dirlist ? argv : NULL)); 407 408 msg("mapping (Pass II) [directories]\n"); 409 while (anydirskipped) { 410 anydirskipped = mapdirs(maxino, &tapesize); 411 } 412 413 if (pipeout) { 414 tapesize += 10; /* 10 trailer blocks */ 415 msg("estimated %ld tape blocks.\n", tapesize); 416 } else { 417 double fetapes; 418 419 if (blocksperfile) 420 fetapes = (double) tapesize / blocksperfile; 421 else if (cartridge) { 422 /* Estimate number of tapes, assuming streaming stops at 423 the end of each block written, and not in mid-block. 424 Assume no erroneous blocks; this can be compensated 425 for with an artificially low tape size. */ 426 fetapes = 427 ( tapesize /* blocks */ 428 * TP_BSIZE /* bytes/block */ 429 * (1.0/density) /* 0.1" / byte */ 430 + 431 tapesize /* blocks */ 432 * (1.0/ntrec) /* streaming-stops per block */ 433 * 15.48 /* 0.1" / streaming-stop */ 434 ) * (1.0 / tsize ); /* tape / 0.1" */ 435 } else { 436 /* Estimate number of tapes, for old fashioned 9-track 437 tape */ 438 int tenthsperirg = (density == 625) ? 3 : 7; 439 fetapes = 440 ( tapesize /* blocks */ 441 * TP_BSIZE /* bytes / block */ 442 * (1.0/density) /* 0.1" / byte */ 443 + 444 tapesize /* blocks */ 445 * (1.0/ntrec) /* IRG's / block */ 446 * tenthsperirg /* 0.1" / IRG */ 447 ) * (1.0 / tsize ); /* tape / 0.1" */ 448 } 449 etapes = fetapes; /* truncating assignment */ 450 etapes++; 451 /* count the dumped inodes map on each additional tape */ 452 tapesize += (etapes - 1) * 453 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); 454 tapesize += etapes + 10; /* headers + 10 trailer blks */ 455 msg("estimated %ld tape blocks on %3.2f tape(s).\n", 456 tapesize, fetapes); 457 } 458 /* 459 * If the user only wants an estimate of the number of 460 * tapes, exit now. 461 */ 462 if (just_estimate) 463 exit(0); 464 465 /* 466 * Allocate tape buffer. 467 */ 468 if (!alloctape()) 469 quit("can't allocate tape buffers - try a smaller blocking factor.\n"); 470 471 startnewtape(1); 472 (void)time((time_t *)&(tstart_writing)); 473 xferrate = 0; 474 dumpmap(usedinomap, TS_CLRI, maxino - 1); 475 476 msg("dumping (Pass III) [directories]\n"); 477 dirty = 0; /* XXX just to get gcc to shut up */ 478 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) { 479 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 480 dirty = *map++; 481 else 482 dirty >>= 1; 483 if ((dirty & 1) == 0) 484 continue; 485 /* 486 * Skip directory inodes deleted and maybe reallocated 487 */ 488 dp = getino(ino); 489 if ((dp->di_mode & IFMT) != IFDIR) 490 continue; 491 (void)dumpino(dp, ino); 492 } 493 494 msg("dumping (Pass IV) [regular files]\n"); 495 for (map = dumpinomap, ino = 1; ino < maxino; ino++) { 496 int mode; 497 498 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */ 499 dirty = *map++; 500 else 501 dirty >>= 1; 502 if ((dirty & 1) == 0) 503 continue; 504 /* 505 * Skip inodes deleted and reallocated as directories. 506 */ 507 dp = getino(ino); 508 mode = dp->di_mode & IFMT; 509 if (mode == IFDIR) 510 continue; 511 (void)dumpino(dp, ino); 512 } 513 514 spcl.c_type = TS_END; 515 for (i = 0; i < ntrec; i++) 516 writeheader(maxino - 1); 517 if (pipeout) 518 msg("%ld tape blocks\n",spcl.c_tapea); 519 else 520 msg("%ld tape blocks on %d volume%s\n", 521 spcl.c_tapea, spcl.c_volume, 522 (spcl.c_volume == 1) ? "" : "s"); 523 tnow = do_stats(); 524 msg("Date of this level %c dump: %s", level, 525 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 526 msg("Date this dump completed: %s", ctime(&tnow)); 527 msg("Average transfer rate: %ld KB/s\n", xferrate / tapeno); 528 putdumptime(); 529 trewind(); 530 broadcast("DUMP IS DONE!\7\7\n"); 531 msg("DUMP IS DONE\n"); 532 Exit(X_FINOK); 533 /* NOTREACHED */ 534 exit(X_FINOK); /* XXX: to satisfy gcc */ 535 } 536 537 static void 538 usage() 539 { 540 541 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n"); 542 (void)fprintf(stderr, " dump [-W | -w]\n"); 543 exit(1); 544 } 545 546 /* 547 * Pick up a numeric argument. It must be nonnegative and in the given 548 * range (except that a vmax of 0 means unlimited). 549 */ 550 static long 551 numarg(meaning, vmin, vmax) 552 char *meaning; 553 long vmin, vmax; 554 { 555 char *p; 556 long val; 557 558 val = strtol(optarg, &p, 10); 559 if (*p) 560 errx(1, "illegal %s -- %s", meaning, optarg); 561 if (val < vmin || (vmax && val > vmax)) 562 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax); 563 return (val); 564 } 565 566 void 567 sig(signo) 568 int signo; 569 { 570 switch(signo) { 571 case SIGALRM: 572 case SIGBUS: 573 case SIGFPE: 574 case SIGHUP: 575 case SIGTERM: 576 case SIGTRAP: 577 if (pipeout) 578 quit("Signal on pipe: cannot recover\n"); 579 msg("Rewriting attempted as response to unknown signal.\n"); 580 (void)fflush(stderr); 581 (void)fflush(stdout); 582 close_rewind(); 583 exit(X_REWRITE); 584 /* NOTREACHED */ 585 case SIGSEGV: 586 msg("SIGSEGV: ABORTING!\n"); 587 (void)signal(SIGSEGV, SIG_DFL); 588 (void)kill(0, SIGSEGV); 589 /* NOTREACHED */ 590 } 591 } 592 593 char * 594 rawname(cp) 595 char *cp; 596 { 597 static char rawbuf[MAXPATHLEN]; 598 char *dp = strrchr(cp, '/'); 599 600 if (dp == NULL) 601 return (NULL); 602 *dp = '\0'; 603 (void)snprintf(rawbuf, sizeof rawbuf, "%s/r%s", cp, dp + 1); 604 *dp = '/'; 605 return (rawbuf); 606 } 607 608 /* 609 * obsolete -- 610 * Change set of key letters and ordered arguments into something 611 * getopt(3) will like. 612 */ 613 static void 614 obsolete(argcp, argvp) 615 int *argcp; 616 char **argvp[]; 617 { 618 int argc, flags; 619 char *ap, **argv, *flagsp, **nargv, *p; 620 621 /* Setup. */ 622 argv = *argvp; 623 argc = *argcp; 624 625 /* Return if no arguments or first argument has leading dash. */ 626 ap = argv[1]; 627 if (argc == 1 || *ap == '-') 628 return; 629 630 /* Allocate space for new arguments. */ 631 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL || 632 (p = flagsp = malloc(strlen(ap) + 2)) == NULL) 633 err(1, "malloc"); 634 635 *nargv++ = *argv; 636 argv += 2; 637 638 for (flags = 0; *ap; ++ap) { 639 switch (*ap) { 640 case 'B': 641 case 'b': 642 case 'd': 643 case 'f': 644 case 'h': 645 case 's': 646 case 'T': 647 if (*argv == NULL) { 648 warnx("option requires an argument -- %c", *ap); 649 usage(); 650 } 651 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL) 652 err(1, "malloc"); 653 nargv[0][0] = '-'; 654 nargv[0][1] = *ap; 655 (void)strcpy(&nargv[0][2], *argv); /* XXX safe strcpy */ 656 ++argv; 657 ++nargv; 658 break; 659 default: 660 if (!flags) { 661 *p++ = '-'; 662 flags = 1; 663 } 664 *p++ = *ap; 665 break; 666 } 667 } 668 669 /* Terminate flags. */ 670 if (flags) { 671 *p = '\0'; 672 *nargv++ = flagsp; 673 } 674 675 /* Copy remaining arguments. */ 676 while ((*nargv++ = *argv++) != NULL) 677 ; 678 679 /* Update argument count. */ 680 *argcp = nargv - *argvp - 1; 681 } 682