1 /* OPENBSD ORIGINAL: lib/libc/gen/glob.c */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Guido van Rossum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "includes.h" 36 #include <ctype.h> 37 38 static long 39 get_arg_max(void) 40 { 41 #ifdef ARG_MAX 42 return(ARG_MAX); 43 #elif defined(HAVE_SYSCONF) && defined(_SC_ARG_MAX) 44 return(sysconf(_SC_ARG_MAX)); 45 #else 46 return(256); /* XXX: arbitrary */ 47 #endif 48 } 49 50 #if !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || \ 51 !defined(GLOB_HAS_GL_MATCHC) 52 53 #if defined(LIBC_SCCS) && !defined(lint) 54 #if 0 55 static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; 56 #else 57 static char rcsid[] = "$OpenBSD: glob.c,v 1.22 2003/06/25 21:16:47 deraadt Exp $"; 58 #endif 59 #endif /* LIBC_SCCS and not lint */ 60 61 /* 62 * glob(3) -- a superset of the one defined in POSIX 1003.2. 63 * 64 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 65 * 66 * Optional extra services, controlled by flags not defined by POSIX: 67 * 68 * GLOB_QUOTE: 69 * Escaping convention: \ inhibits any special meaning the following 70 * character might have (except \ at end of string is retained). 71 * GLOB_MAGCHAR: 72 * Set in gl_flags if pattern contained a globbing character. 73 * GLOB_NOMAGIC: 74 * Same as GLOB_NOCHECK, but it will only append pattern if it did 75 * not contain any magic characters. [Used in csh style globbing] 76 * GLOB_ALTDIRFUNC: 77 * Use alternately specified directory access functions. 78 * GLOB_TILDE: 79 * expand ~user/foo to the /home/dir/of/user/foo 80 * GLOB_BRACE: 81 * expand {1,2}{a,b} to 1a 1b 2a 2b 82 * gl_matchc: 83 * Number of matches in the current invocation of glob. 84 */ 85 86 87 #define DOLLAR '$' 88 #define DOT '.' 89 #define EOS '\0' 90 #define LBRACKET '[' 91 #define NOT '!' 92 #define QUESTION '?' 93 #define QUOTE '\\' 94 #define RANGE '-' 95 #define RBRACKET ']' 96 #define SEP '/' 97 #define STAR '*' 98 #undef TILDE /* Some platforms may already define it */ 99 #define TILDE '~' 100 #define UNDERSCORE '_' 101 #define LBRACE '{' 102 #define RBRACE '}' 103 #define SLASH '/' 104 #define COMMA ',' 105 106 #ifndef DEBUG 107 108 #define M_QUOTE 0x8000 109 #define M_PROTECT 0x4000 110 #define M_MASK 0xffff 111 #define M_ASCII 0x00ff 112 113 typedef u_short Char; 114 115 #else 116 117 #define M_QUOTE 0x80 118 #define M_PROTECT 0x40 119 #define M_MASK 0xff 120 #define M_ASCII 0x7f 121 122 typedef char Char; 123 124 #endif 125 126 127 #define CHAR(c) ((Char)((c)&M_ASCII)) 128 #define META(c) ((Char)((c)|M_QUOTE)) 129 #define M_ALL META('*') 130 #define M_END META(']') 131 #define M_NOT META('!') 132 #define M_ONE META('?') 133 #define M_RNG META('-') 134 #define M_SET META('[') 135 #define ismeta(c) (((c)&M_QUOTE) != 0) 136 137 138 static int compare(const void *, const void *); 139 static int g_Ctoc(const Char *, char *, u_int); 140 static int g_lstat(Char *, struct stat *, glob_t *); 141 static DIR *g_opendir(Char *, glob_t *); 142 static Char *g_strchr(Char *, int); 143 static int g_stat(Char *, struct stat *, glob_t *); 144 static int glob0(const Char *, glob_t *); 145 static int glob1(Char *, Char *, glob_t *, size_t *); 146 static int glob2(Char *, Char *, Char *, Char *, Char *, Char *, 147 glob_t *, size_t *); 148 static int glob3(Char *, Char *, Char *, Char *, Char *, Char *, 149 Char *, Char *, glob_t *, size_t *); 150 static int globextend(const Char *, glob_t *, size_t *); 151 static const Char * 152 globtilde(const Char *, Char *, size_t, glob_t *); 153 static int globexp1(const Char *, glob_t *); 154 static int globexp2(const Char *, const Char *, glob_t *, int *); 155 static int match(Char *, Char *, Char *); 156 #ifdef DEBUG 157 static void qprintf(const char *, Char *); 158 #endif 159 160 int 161 glob(pattern, flags, errfunc, pglob) 162 const char *pattern; 163 int flags, (*errfunc)(const char *, int); 164 glob_t *pglob; 165 { 166 const u_char *patnext; 167 int c; 168 Char *bufnext, *bufend, patbuf[MAXPATHLEN]; 169 170 patnext = (u_char *) pattern; 171 if (!(flags & GLOB_APPEND)) { 172 pglob->gl_pathc = 0; 173 pglob->gl_pathv = NULL; 174 if (!(flags & GLOB_DOOFFS)) 175 pglob->gl_offs = 0; 176 } 177 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 178 pglob->gl_errfunc = errfunc; 179 pglob->gl_matchc = 0; 180 181 bufnext = patbuf; 182 bufend = bufnext + MAXPATHLEN - 1; 183 if (flags & GLOB_NOESCAPE) 184 while (bufnext < bufend && (c = *patnext++) != EOS) 185 *bufnext++ = c; 186 else { 187 /* Protect the quoted characters. */ 188 while (bufnext < bufend && (c = *patnext++) != EOS) 189 if (c == QUOTE) { 190 if ((c = *patnext++) == EOS) { 191 c = QUOTE; 192 --patnext; 193 } 194 *bufnext++ = c | M_PROTECT; 195 } else 196 *bufnext++ = c; 197 } 198 *bufnext = EOS; 199 200 if (flags & GLOB_BRACE) 201 return globexp1(patbuf, pglob); 202 else 203 return glob0(patbuf, pglob); 204 } 205 206 /* 207 * Expand recursively a glob {} pattern. When there is no more expansion 208 * invoke the standard globbing routine to glob the rest of the magic 209 * characters 210 */ 211 static int 212 globexp1(pattern, pglob) 213 const Char *pattern; 214 glob_t *pglob; 215 { 216 const Char* ptr = pattern; 217 int rv; 218 219 /* Protect a single {}, for find(1), like csh */ 220 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 221 return glob0(pattern, pglob); 222 223 while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL) 224 if (!globexp2(ptr, pattern, pglob, &rv)) 225 return rv; 226 227 return glob0(pattern, pglob); 228 } 229 230 231 /* 232 * Recursive brace globbing helper. Tries to expand a single brace. 233 * If it succeeds then it invokes globexp1 with the new pattern. 234 * If it fails then it tries to glob the rest of the pattern and returns. 235 */ 236 static int 237 globexp2(ptr, pattern, pglob, rv) 238 const Char *ptr, *pattern; 239 glob_t *pglob; 240 int *rv; 241 { 242 int i; 243 Char *lm, *ls; 244 const Char *pe, *pm, *pl; 245 Char patbuf[MAXPATHLEN]; 246 247 /* copy part up to the brace */ 248 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 249 ; 250 *lm = EOS; 251 ls = lm; 252 253 /* Find the balanced brace */ 254 for (i = 0, pe = ++ptr; *pe; pe++) 255 if (*pe == LBRACKET) { 256 /* Ignore everything between [] */ 257 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 258 ; 259 if (*pe == EOS) { 260 /* 261 * We could not find a matching RBRACKET. 262 * Ignore and just look for RBRACE 263 */ 264 pe = pm; 265 } 266 } else if (*pe == LBRACE) 267 i++; 268 else if (*pe == RBRACE) { 269 if (i == 0) 270 break; 271 i--; 272 } 273 274 /* Non matching braces; just glob the pattern */ 275 if (i != 0 || *pe == EOS) { 276 *rv = glob0(patbuf, pglob); 277 return 0; 278 } 279 280 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 281 switch (*pm) { 282 case LBRACKET: 283 /* Ignore everything between [] */ 284 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 285 ; 286 if (*pm == EOS) { 287 /* 288 * We could not find a matching RBRACKET. 289 * Ignore and just look for RBRACE 290 */ 291 pm = pl; 292 } 293 break; 294 295 case LBRACE: 296 i++; 297 break; 298 299 case RBRACE: 300 if (i) { 301 i--; 302 break; 303 } 304 /* FALLTHROUGH */ 305 case COMMA: 306 if (i && *pm == COMMA) 307 break; 308 else { 309 /* Append the current string */ 310 for (lm = ls; (pl < pm); *lm++ = *pl++) 311 ; 312 313 /* 314 * Append the rest of the pattern after the 315 * closing brace 316 */ 317 for (pl = pe + 1; (*lm++ = *pl++) != EOS; ) 318 ; 319 320 /* Expand the current pattern */ 321 #ifdef DEBUG 322 qprintf("globexp2:", patbuf); 323 #endif 324 *rv = globexp1(patbuf, pglob); 325 326 /* move after the comma, to the next string */ 327 pl = pm + 1; 328 } 329 break; 330 331 default: 332 break; 333 } 334 } 335 *rv = 0; 336 return 0; 337 } 338 339 340 341 /* 342 * expand tilde from the passwd file. 343 */ 344 static const Char * 345 globtilde(pattern, patbuf, patbuf_len, pglob) 346 const Char *pattern; 347 Char *patbuf; 348 size_t patbuf_len; 349 glob_t *pglob; 350 { 351 struct passwd *pwd; 352 char *h; 353 const Char *p; 354 Char *b, *eb; 355 356 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 357 return pattern; 358 359 /* Copy up to the end of the string or / */ 360 eb = &patbuf[patbuf_len - 1]; 361 for (p = pattern + 1, h = (char *) patbuf; 362 h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 363 ; 364 365 *h = EOS; 366 367 #if 0 368 if (h == (char *)eb) 369 return what; 370 #endif 371 372 if (((char *) patbuf)[0] == EOS) { 373 /* 374 * handle a plain ~ or ~/ by expanding $HOME 375 * first and then trying the password file 376 */ 377 #if 0 378 if (issetugid() != 0 || (h = getenv("HOME")) == NULL) { 379 #endif 380 if ((getuid() != geteuid()) || (h = getenv("HOME")) == NULL) { 381 if ((pwd = getpwuid(getuid())) == NULL) 382 return pattern; 383 else 384 h = pwd->pw_dir; 385 } 386 } else { 387 /* 388 * Expand a ~user 389 */ 390 if ((pwd = getpwnam((char*) patbuf)) == NULL) 391 return pattern; 392 else 393 h = pwd->pw_dir; 394 } 395 396 /* Copy the home directory */ 397 for (b = patbuf; b < eb && *h; *b++ = *h++) 398 ; 399 400 /* Append the rest of the pattern */ 401 while (b < eb && (*b++ = *p++) != EOS) 402 ; 403 *b = EOS; 404 405 return patbuf; 406 } 407 408 409 /* 410 * The main glob() routine: compiles the pattern (optionally processing 411 * quotes), calls glob1() to do the real pattern matching, and finally 412 * sorts the list (unless unsorted operation is requested). Returns 0 413 * if things went well, nonzero if errors occurred. It is not an error 414 * to find no matches. 415 */ 416 static int 417 glob0(pattern, pglob) 418 const Char *pattern; 419 glob_t *pglob; 420 { 421 const Char *qpatnext; 422 int c, err, oldpathc; 423 Char *bufnext, patbuf[MAXPATHLEN]; 424 size_t limit = 0; 425 426 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 427 oldpathc = pglob->gl_pathc; 428 bufnext = patbuf; 429 430 /* We don't need to check for buffer overflow any more. */ 431 while ((c = *qpatnext++) != EOS) { 432 switch (c) { 433 case LBRACKET: 434 c = *qpatnext; 435 if (c == NOT) 436 ++qpatnext; 437 if (*qpatnext == EOS || 438 g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) { 439 *bufnext++ = LBRACKET; 440 if (c == NOT) 441 --qpatnext; 442 break; 443 } 444 *bufnext++ = M_SET; 445 if (c == NOT) 446 *bufnext++ = M_NOT; 447 c = *qpatnext++; 448 do { 449 *bufnext++ = CHAR(c); 450 if (*qpatnext == RANGE && 451 (c = qpatnext[1]) != RBRACKET) { 452 *bufnext++ = M_RNG; 453 *bufnext++ = CHAR(c); 454 qpatnext += 2; 455 } 456 } while ((c = *qpatnext++) != RBRACKET); 457 pglob->gl_flags |= GLOB_MAGCHAR; 458 *bufnext++ = M_END; 459 break; 460 case QUESTION: 461 pglob->gl_flags |= GLOB_MAGCHAR; 462 *bufnext++ = M_ONE; 463 break; 464 case STAR: 465 pglob->gl_flags |= GLOB_MAGCHAR; 466 /* collapse adjacent stars to one, 467 * to avoid exponential behavior 468 */ 469 if (bufnext == patbuf || bufnext[-1] != M_ALL) 470 *bufnext++ = M_ALL; 471 break; 472 default: 473 *bufnext++ = CHAR(c); 474 break; 475 } 476 } 477 *bufnext = EOS; 478 #ifdef DEBUG 479 qprintf("glob0:", patbuf); 480 #endif 481 482 if ((err = glob1(patbuf, patbuf+MAXPATHLEN-1, pglob, &limit)) != 0) 483 return(err); 484 485 /* 486 * If there was no match we are going to append the pattern 487 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 488 * and the pattern did not contain any magic characters 489 * GLOB_NOMAGIC is there just for compatibility with csh. 490 */ 491 if (pglob->gl_pathc == oldpathc) { 492 if ((pglob->gl_flags & GLOB_NOCHECK) || 493 ((pglob->gl_flags & GLOB_NOMAGIC) && 494 !(pglob->gl_flags & GLOB_MAGCHAR))) 495 return(globextend(pattern, pglob, &limit)); 496 else 497 return(GLOB_NOMATCH); 498 } 499 if (!(pglob->gl_flags & GLOB_NOSORT)) 500 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 501 pglob->gl_pathc - oldpathc, sizeof(char *), compare); 502 return(0); 503 } 504 505 static int 506 compare(p, q) 507 const void *p, *q; 508 { 509 return(strcmp(*(char **)p, *(char **)q)); 510 } 511 512 static int 513 glob1(pattern, pattern_last, pglob, limitp) 514 Char *pattern, *pattern_last; 515 glob_t *pglob; 516 size_t *limitp; 517 { 518 Char pathbuf[MAXPATHLEN]; 519 520 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 521 if (*pattern == EOS) 522 return(0); 523 return(glob2(pathbuf, pathbuf+MAXPATHLEN-1, 524 pathbuf, pathbuf+MAXPATHLEN-1, 525 pattern, pattern_last, pglob, limitp)); 526 } 527 528 /* 529 * The functions glob2 and glob3 are mutually recursive; there is one level 530 * of recursion for each segment in the pattern that contains one or more 531 * meta characters. 532 */ 533 static int 534 glob2(pathbuf, pathbuf_last, pathend, pathend_last, pattern, 535 pattern_last, pglob, limitp) 536 Char *pathbuf, *pathbuf_last, *pathend, *pathend_last; 537 Char *pattern, *pattern_last; 538 glob_t *pglob; 539 size_t *limitp; 540 { 541 struct stat sb; 542 Char *p, *q; 543 int anymeta; 544 545 /* 546 * Loop over pattern segments until end of pattern or until 547 * segment with meta character found. 548 */ 549 for (anymeta = 0;;) { 550 if (*pattern == EOS) { /* End of pattern? */ 551 *pathend = EOS; 552 if (g_lstat(pathbuf, &sb, pglob)) 553 return(0); 554 555 if (((pglob->gl_flags & GLOB_MARK) && 556 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 557 (S_ISLNK(sb.st_mode) && 558 (g_stat(pathbuf, &sb, pglob) == 0) && 559 S_ISDIR(sb.st_mode)))) { 560 if (pathend+1 > pathend_last) 561 return (1); 562 *pathend++ = SEP; 563 *pathend = EOS; 564 } 565 ++pglob->gl_matchc; 566 return(globextend(pathbuf, pglob, limitp)); 567 } 568 569 /* Find end of next segment, copy tentatively to pathend. */ 570 q = pathend; 571 p = pattern; 572 while (*p != EOS && *p != SEP) { 573 if (ismeta(*p)) 574 anymeta = 1; 575 if (q+1 > pathend_last) 576 return (1); 577 *q++ = *p++; 578 } 579 580 if (!anymeta) { /* No expansion, do next segment. */ 581 pathend = q; 582 pattern = p; 583 while (*pattern == SEP) { 584 if (pathend+1 > pathend_last) 585 return (1); 586 *pathend++ = *pattern++; 587 } 588 } else 589 /* Need expansion, recurse. */ 590 return(glob3(pathbuf, pathbuf_last, pathend, 591 pathend_last, pattern, pattern_last, 592 p, pattern_last, pglob, limitp)); 593 } 594 /* NOTREACHED */ 595 } 596 597 static int 598 glob3(pathbuf, pathbuf_last, pathend, pathend_last, pattern, pattern_last, 599 restpattern, restpattern_last, pglob, limitp) 600 Char *pathbuf, *pathbuf_last, *pathend, *pathend_last; 601 Char *pattern, *pattern_last, *restpattern, *restpattern_last; 602 glob_t *pglob; 603 size_t *limitp; 604 { 605 register struct dirent *dp; 606 DIR *dirp; 607 int err; 608 char buf[MAXPATHLEN]; 609 610 /* 611 * The readdirfunc declaration can't be prototyped, because it is 612 * assigned, below, to two functions which are prototyped in glob.h 613 * and dirent.h as taking pointers to differently typed opaque 614 * structures. 615 */ 616 struct dirent *(*readdirfunc)(void *); 617 618 if (pathend > pathend_last) 619 return (1); 620 *pathend = EOS; 621 errno = 0; 622 623 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 624 /* TODO: don't call for ENOENT or ENOTDIR? */ 625 if (pglob->gl_errfunc) { 626 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 627 return(GLOB_ABORTED); 628 if (pglob->gl_errfunc(buf, errno) || 629 pglob->gl_flags & GLOB_ERR) 630 return(GLOB_ABORTED); 631 } 632 return(0); 633 } 634 635 err = 0; 636 637 /* Search directory for matching names. */ 638 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 639 readdirfunc = pglob->gl_readdir; 640 else 641 readdirfunc = (struct dirent *(*)(void *))readdir; 642 while ((dp = (*readdirfunc)(dirp))) { 643 register u_char *sc; 644 register Char *dc; 645 646 /* Initial DOT must be matched literally. */ 647 if (dp->d_name[0] == DOT && *pattern != DOT) 648 continue; 649 dc = pathend; 650 sc = (u_char *) dp->d_name; 651 while (dc < pathend_last && (*dc++ = *sc++) != EOS) 652 ; 653 if (dc >= pathend_last) { 654 *dc = EOS; 655 err = 1; 656 break; 657 } 658 659 if (!match(pathend, pattern, restpattern)) { 660 *pathend = EOS; 661 continue; 662 } 663 err = glob2(pathbuf, pathbuf_last, --dc, pathend_last, 664 restpattern, restpattern_last, pglob, limitp); 665 if (err) 666 break; 667 } 668 669 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 670 (*pglob->gl_closedir)(dirp); 671 else 672 closedir(dirp); 673 return(err); 674 } 675 676 677 /* 678 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 679 * add the new item, and update gl_pathc. 680 * 681 * This assumes the BSD realloc, which only copies the block when its size 682 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 683 * behavior. 684 * 685 * Return 0 if new item added, error code if memory couldn't be allocated. 686 * 687 * Invariant of the glob_t structure: 688 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 689 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 690 */ 691 static int 692 globextend(path, pglob, limitp) 693 const Char *path; 694 glob_t *pglob; 695 size_t *limitp; 696 { 697 register char **pathv; 698 register int i; 699 u_int newsize, len; 700 char *copy; 701 const Char *p; 702 703 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 704 pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) : 705 malloc(newsize); 706 if (pathv == NULL) { 707 if (pglob->gl_pathv) { 708 free(pglob->gl_pathv); 709 pglob->gl_pathv = NULL; 710 } 711 return(GLOB_NOSPACE); 712 } 713 714 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 715 /* first time around -- clear initial gl_offs items */ 716 pathv += pglob->gl_offs; 717 for (i = pglob->gl_offs; --i >= 0; ) 718 *--pathv = NULL; 719 } 720 pglob->gl_pathv = pathv; 721 722 for (p = path; *p++;) 723 ; 724 len = (size_t)(p - path); 725 *limitp += len; 726 if ((copy = malloc(len)) != NULL) { 727 if (g_Ctoc(path, copy, len)) { 728 free(copy); 729 return(GLOB_NOSPACE); 730 } 731 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 732 } 733 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 734 735 if ((pglob->gl_flags & GLOB_LIMIT) && 736 newsize + *limitp >= (u_int) get_arg_max()) { 737 errno = 0; 738 return(GLOB_NOSPACE); 739 } 740 741 return(copy == NULL ? GLOB_NOSPACE : 0); 742 } 743 744 745 /* 746 * pattern matching function for filenames. Each occurrence of the * 747 * pattern causes a recursion level. 748 */ 749 static int 750 match(name, pat, patend) 751 register Char *name, *pat, *patend; 752 { 753 int ok, negate_range; 754 Char c, k; 755 756 while (pat < patend) { 757 c = *pat++; 758 switch (c & M_MASK) { 759 case M_ALL: 760 if (pat == patend) 761 return(1); 762 do 763 if (match(name, pat, patend)) 764 return(1); 765 while (*name++ != EOS) 766 ; 767 return(0); 768 case M_ONE: 769 if (*name++ == EOS) 770 return(0); 771 break; 772 case M_SET: 773 ok = 0; 774 if ((k = *name++) == EOS) 775 return(0); 776 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 777 ++pat; 778 while (((c = *pat++) & M_MASK) != M_END) 779 if ((*pat & M_MASK) == M_RNG) { 780 if (c <= k && k <= pat[1]) 781 ok = 1; 782 pat += 2; 783 } else if (c == k) 784 ok = 1; 785 if (ok == negate_range) 786 return(0); 787 break; 788 default: 789 if (*name++ != c) 790 return(0); 791 break; 792 } 793 } 794 return(*name == EOS); 795 } 796 797 /* Free allocated data belonging to a glob_t structure. */ 798 void 799 globfree(pglob) 800 glob_t *pglob; 801 { 802 register int i; 803 register char **pp; 804 805 if (pglob->gl_pathv != NULL) { 806 pp = pglob->gl_pathv + pglob->gl_offs; 807 for (i = pglob->gl_pathc; i--; ++pp) 808 if (*pp) 809 free(*pp); 810 free(pglob->gl_pathv); 811 pglob->gl_pathv = NULL; 812 } 813 } 814 815 static DIR * 816 g_opendir(str, pglob) 817 register Char *str; 818 glob_t *pglob; 819 { 820 char buf[MAXPATHLEN]; 821 822 if (!*str) 823 strlcpy(buf, ".", sizeof buf); 824 else { 825 if (g_Ctoc(str, buf, sizeof(buf))) 826 return(NULL); 827 } 828 829 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 830 return((*pglob->gl_opendir)(buf)); 831 832 return(opendir(buf)); 833 } 834 835 static int 836 g_lstat(fn, sb, pglob) 837 register Char *fn; 838 struct stat *sb; 839 glob_t *pglob; 840 { 841 char buf[MAXPATHLEN]; 842 843 if (g_Ctoc(fn, buf, sizeof(buf))) 844 return(-1); 845 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 846 return((*pglob->gl_lstat)(buf, sb)); 847 return(lstat(buf, sb)); 848 } 849 850 static int 851 g_stat(fn, sb, pglob) 852 register Char *fn; 853 struct stat *sb; 854 glob_t *pglob; 855 { 856 char buf[MAXPATHLEN]; 857 858 if (g_Ctoc(fn, buf, sizeof(buf))) 859 return(-1); 860 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 861 return((*pglob->gl_stat)(buf, sb)); 862 return(stat(buf, sb)); 863 } 864 865 static Char * 866 g_strchr(str, ch) 867 Char *str; 868 int ch; 869 { 870 do { 871 if (*str == ch) 872 return (str); 873 } while (*str++); 874 return (NULL); 875 } 876 877 static int 878 g_Ctoc(str, buf, len) 879 register const Char *str; 880 char *buf; 881 u_int len; 882 { 883 884 while (len--) { 885 if ((*buf++ = *str++) == EOS) 886 return (0); 887 } 888 return (1); 889 } 890 891 #ifdef DEBUG 892 static void 893 qprintf(str, s) 894 const char *str; 895 register Char *s; 896 { 897 register Char *p; 898 899 (void)printf("%s:\n", str); 900 for (p = s; *p; p++) 901 (void)printf("%c", CHAR(*p)); 902 (void)printf("\n"); 903 for (p = s; *p; p++) 904 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 905 (void)printf("\n"); 906 for (p = s; *p; p++) 907 (void)printf("%c", ismeta(*p) ? '_' : ' '); 908 (void)printf("\n"); 909 } 910 #endif 911 912 #endif /* !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || 913 !defined(GLOB_HAS_GL_MATCHC) */ 914 915