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 } 674