1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Guido van Rossum. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)glob.c 8.3 (Berkeley) 10/13/93 33 * $FreeBSD: src/lib/libc/gen/glob.c,v 1.27 2008/06/26 07:12:35 mtm Exp $ 34 * $DragonFly: src/lib/libc/gen/glob.c,v 1.6 2005/12/07 02:28:15 corecode Exp $ 35 */ 36 37 /* 38 * glob(3) -- a superset of the one defined in POSIX 1003.2. 39 * 40 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 41 * 42 * Optional extra services, controlled by flags not defined by POSIX: 43 * 44 * GLOB_QUOTE: 45 * Escaping convention: \ inhibits any special meaning the following 46 * character might have (except \ at end of string is retained). 47 * GLOB_MAGCHAR: 48 * Set in gl_flags if pattern contained a globbing character. 49 * GLOB_NOMAGIC: 50 * Same as GLOB_NOCHECK, but it will only append pattern if it did 51 * not contain any magic characters. [Used in csh style globbing] 52 * GLOB_ALTDIRFUNC: 53 * Use alternately specified directory access functions. 54 * GLOB_TILDE: 55 * expand ~user/foo to the /home/dir/of/user/foo 56 * GLOB_BRACE: 57 * expand {1,2}{a,b} to 1a 1b 2a 2b 58 * gl_matchc: 59 * Number of matches in the current invocation of glob. 60 */ 61 62 /* 63 * Some notes on multibyte character support: 64 * 1. Patterns with illegal byte sequences match nothing - even if 65 * GLOB_NOCHECK is specified. 66 * 2. Illegal byte sequences in filenames are handled by treating them as 67 * single-byte characters with a value of the first byte of the sequence 68 * cast to wchar_t. 69 * 3. State-dependent encodings are not currently supported. 70 */ 71 72 #include <sys/param.h> 73 #include <sys/stat.h> 74 75 #include <ctype.h> 76 #include <dirent.h> 77 #include <errno.h> 78 #include <glob.h> 79 #include <limits.h> 80 #include <pwd.h> 81 #include <stdint.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <unistd.h> 86 #include <wchar.h> 87 88 #include "collate.h" 89 90 #define DOLLAR '$' 91 #define DOT '.' 92 #define EOS '\0' 93 #define LBRACKET '[' 94 #define NOT '!' 95 #define QUESTION '?' 96 #define QUOTE '\\' 97 #define RANGE '-' 98 #define RBRACKET ']' 99 #define SEP '/' 100 #define STAR '*' 101 #define TILDE '~' 102 #define UNDERSCORE '_' 103 #define LBRACE '{' 104 #define RBRACE '}' 105 #define SLASH '/' 106 #define COMMA ',' 107 108 #ifndef DEBUG 109 110 #define M_QUOTE 0x8000000000ULL 111 #define M_PROTECT 0x4000000000ULL 112 #define M_MASK 0xffffffffffULL 113 #define M_CHAR 0x00ffffffffULL 114 115 typedef uint_fast64_t Char; 116 117 #else 118 119 #define M_QUOTE 0x80 120 #define M_PROTECT 0x40 121 #define M_MASK 0xff 122 #define M_CHAR 0x7f 123 124 typedef char Char; 125 126 #endif 127 128 129 #define CHAR(c) ((Char)((c)&M_CHAR)) 130 #define META(c) ((Char)((c)|M_QUOTE)) 131 #define M_ALL META('*') 132 #define M_END META(']') 133 #define M_NOT META('!') 134 #define M_ONE META('?') 135 #define M_RNG META('-') 136 #define M_SET META('[') 137 #define ismeta(c) (((c)&M_QUOTE) != 0) 138 139 140 static int compare(const void *, const void *); 141 static int g_Ctoc(const Char *, char *, size_t); 142 static int g_lstat(const Char *, struct stat *, glob_t *); 143 static DIR *g_opendir(const Char *, glob_t *); 144 static const Char *g_strchr(const Char *, wchar_t); 145 #ifdef notdef 146 static Char *g_strcat(Char *, const Char *); 147 #endif 148 static int g_stat(const Char *, struct stat *, glob_t *); 149 static int glob0(const Char *, glob_t *, size_t *); 150 static int glob1(const Char *, glob_t *, size_t *); 151 static int glob2(Char *, Char *, Char *, const Char *, glob_t *, 152 size_t *); 153 static int glob3(Char *, Char *, Char *, const Char *, const Char *, 154 glob_t *, size_t *); 155 static int globextend(const Char *, glob_t *, size_t *); 156 static const Char * 157 globtilde(const Char *, Char *, size_t, glob_t *); 158 static int globexp1(const Char *, glob_t *, size_t *); 159 static int globexp2(const Char *, const Char *, glob_t *, int *, size_t *); 160 static int match(const Char *, const Char *, const Char *); 161 #ifdef DEBUG 162 static void qprintf(const char *, const Char *); 163 #endif 164 165 int 166 glob(const char *pattern, int flags, int (*errfunc)(const char *, int), 167 glob_t *pglob) 168 { 169 const char *patnext; 170 size_t limit; 171 Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot; 172 mbstate_t mbs; 173 wchar_t wc; 174 size_t clen; 175 176 patnext = pattern; 177 if (!(flags & GLOB_APPEND)) { 178 pglob->gl_pathc = 0; 179 pglob->gl_pathv = NULL; 180 if (!(flags & GLOB_DOOFFS)) 181 pglob->gl_offs = 0; 182 } 183 if (flags & GLOB_LIMIT) { 184 limit = pglob->gl_matchc; 185 if (limit == 0) 186 limit = ARG_MAX; 187 } else 188 limit = 0; 189 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 190 pglob->gl_errfunc = errfunc; 191 pglob->gl_matchc = 0; 192 193 bufnext = patbuf; 194 bufend = bufnext + MAXPATHLEN - 1; 195 if (flags & GLOB_NOESCAPE) { 196 memset(&mbs, 0, sizeof(mbs)); 197 while (bufend - bufnext >= MB_CUR_MAX) { 198 clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); 199 if (clen == (size_t)-1 || clen == (size_t)-2) 200 return (GLOB_NOMATCH); 201 else if (clen == 0) 202 break; 203 *bufnext++ = wc; 204 patnext += clen; 205 } 206 } else { 207 /* Protect the quoted characters. */ 208 memset(&mbs, 0, sizeof(mbs)); 209 while (bufend - bufnext >= MB_CUR_MAX) { 210 if (*patnext == QUOTE) { 211 if (*++patnext == EOS) { 212 *bufnext++ = QUOTE | M_PROTECT; 213 continue; 214 } 215 prot = M_PROTECT; 216 } else 217 prot = 0; 218 clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); 219 if (clen == (size_t)-1 || clen == (size_t)-2) 220 return (GLOB_NOMATCH); 221 else if (clen == 0) 222 break; 223 *bufnext++ = wc | prot; 224 patnext += clen; 225 } 226 } 227 *bufnext = EOS; 228 229 if (flags & GLOB_BRACE) 230 return globexp1(patbuf, pglob, &limit); 231 else 232 return glob0(patbuf, pglob, &limit); 233 } 234 235 /* 236 * Expand recursively a glob {} pattern. When there is no more expansion 237 * invoke the standard globbing routine to glob the rest of the magic 238 * characters 239 */ 240 static int 241 globexp1(const Char *pattern, glob_t *pglob, size_t *limit) 242 { 243 const Char *ptr = pattern; 244 int rv; 245 246 /* Protect a single {}, for find(1), like csh */ 247 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 248 return glob0(pattern, pglob, limit); 249 250 while ((ptr = g_strchr(ptr, LBRACE)) != NULL) 251 if (!globexp2(ptr, pattern, pglob, &rv, limit)) 252 return rv; 253 254 return glob0(pattern, pglob, limit); 255 } 256 257 258 /* 259 * Recursive brace globbing helper. Tries to expand a single brace. 260 * If it succeeds then it invokes globexp1 with the new pattern. 261 * If it fails then it tries to glob the rest of the pattern and returns. 262 */ 263 static int 264 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv, 265 size_t *limit) 266 { 267 int i; 268 Char *lm, *ls; 269 const Char *pe, *pm, *pm1, *pl; 270 Char patbuf[MAXPATHLEN]; 271 272 /* copy part up to the brace */ 273 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 274 continue; 275 *lm = EOS; 276 ls = lm; 277 278 /* Find the balanced brace */ 279 for (i = 0, pe = ++ptr; *pe; pe++) 280 if (*pe == LBRACKET) { 281 /* Ignore everything between [] */ 282 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 283 continue; 284 if (*pe == EOS) { 285 /* 286 * We could not find a matching RBRACKET. 287 * Ignore and just look for RBRACE 288 */ 289 pe = pm; 290 } 291 } 292 else if (*pe == LBRACE) 293 i++; 294 else if (*pe == RBRACE) { 295 if (i == 0) 296 break; 297 i--; 298 } 299 300 /* Non matching braces; just glob the pattern */ 301 if (i != 0 || *pe == EOS) { 302 *rv = glob0(patbuf, pglob, limit); 303 return 0; 304 } 305 306 for (i = 0, pl = pm = ptr; pm <= pe; pm++) 307 switch (*pm) { 308 case LBRACKET: 309 /* Ignore everything between [] */ 310 for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++) 311 continue; 312 if (*pm == EOS) { 313 /* 314 * We could not find a matching RBRACKET. 315 * Ignore and just look for RBRACE 316 */ 317 pm = pm1; 318 } 319 break; 320 321 case LBRACE: 322 i++; 323 break; 324 325 case RBRACE: 326 if (i) { 327 i--; 328 break; 329 } 330 /* FALLTHROUGH */ 331 case COMMA: 332 if (i && *pm == COMMA) 333 break; 334 else { 335 /* Append the current string */ 336 for (lm = ls; (pl < pm); *lm++ = *pl++) 337 continue; 338 /* 339 * Append the rest of the pattern after the 340 * closing brace 341 */ 342 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 343 continue; 344 345 /* Expand the current pattern */ 346 #ifdef DEBUG 347 qprintf("globexp2:", patbuf); 348 #endif 349 *rv = globexp1(patbuf, pglob, limit); 350 351 /* move after the comma, to the next string */ 352 pl = pm + 1; 353 } 354 break; 355 356 default: 357 break; 358 } 359 *rv = 0; 360 return 0; 361 } 362 363 364 365 /* 366 * expand tilde from the passwd file. 367 */ 368 static const Char * 369 globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob) 370 { 371 struct passwd *pwd; 372 char *h; 373 const Char *p; 374 Char *b, *eb; 375 376 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 377 return pattern; 378 379 /* 380 * Copy up to the end of the string or / 381 */ 382 eb = &patbuf[patbuf_len - 1]; 383 for (p = pattern + 1, h = (char *) patbuf; 384 h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 385 continue; 386 387 *h = EOS; 388 389 if (((char *) patbuf)[0] == EOS) { 390 /* 391 * handle a plain ~ or ~/ by expanding $HOME first (iff 392 * we're not running setuid or setgid) and then trying 393 * the password file 394 */ 395 if (issetugid() != 0 || 396 (h = getenv("HOME")) == NULL) { 397 if (((h = getlogin()) != NULL && 398 (pwd = getpwnam(h)) != NULL) || 399 (pwd = getpwuid(getuid())) != NULL) 400 h = pwd->pw_dir; 401 else 402 return pattern; 403 } 404 } 405 else { 406 /* 407 * Expand a ~user 408 */ 409 if ((pwd = getpwnam((char*) patbuf)) == NULL) 410 return pattern; 411 else 412 h = pwd->pw_dir; 413 } 414 415 /* Copy the home directory */ 416 for (b = patbuf; b < eb && *h; *b++ = *h++) 417 continue; 418 419 /* Append the rest of the pattern */ 420 while (b < eb && (*b++ = *p++) != EOS) 421 continue; 422 *b = EOS; 423 424 return patbuf; 425 } 426 427 428 /* 429 * The main glob() routine: compiles the pattern (optionally processing 430 * quotes), calls glob1() to do the real pattern matching, and finally 431 * sorts the list (unless unsorted operation is requested). Returns 0 432 * if things went well, nonzero if errors occurred. 433 */ 434 static int 435 glob0(const Char *pattern, glob_t *pglob, size_t *limit) 436 { 437 const Char *qpatnext; 438 int c, err; 439 size_t oldpathc; 440 Char *bufnext, patbuf[MAXPATHLEN]; 441 442 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 443 oldpathc = pglob->gl_pathc; 444 bufnext = patbuf; 445 446 /* We don't need to check for buffer overflow any more. */ 447 while ((c = *qpatnext++) != EOS) { 448 switch (c) { 449 case LBRACKET: 450 c = *qpatnext; 451 if (c == NOT) 452 ++qpatnext; 453 if (*qpatnext == EOS || 454 g_strchr(qpatnext+1, RBRACKET) == NULL) { 455 *bufnext++ = LBRACKET; 456 if (c == NOT) 457 --qpatnext; 458 break; 459 } 460 *bufnext++ = M_SET; 461 if (c == NOT) 462 *bufnext++ = M_NOT; 463 c = *qpatnext++; 464 do { 465 *bufnext++ = CHAR(c); 466 if (*qpatnext == RANGE && 467 (c = qpatnext[1]) != RBRACKET) { 468 *bufnext++ = M_RNG; 469 *bufnext++ = CHAR(c); 470 qpatnext += 2; 471 } 472 } while ((c = *qpatnext++) != RBRACKET); 473 pglob->gl_flags |= GLOB_MAGCHAR; 474 *bufnext++ = M_END; 475 break; 476 case QUESTION: 477 pglob->gl_flags |= GLOB_MAGCHAR; 478 *bufnext++ = M_ONE; 479 break; 480 case STAR: 481 pglob->gl_flags |= GLOB_MAGCHAR; 482 /* collapse adjacent stars to one, 483 * to avoid exponential behavior 484 */ 485 if (bufnext == patbuf || bufnext[-1] != M_ALL) 486 *bufnext++ = M_ALL; 487 break; 488 default: 489 *bufnext++ = CHAR(c); 490 break; 491 } 492 } 493 *bufnext = EOS; 494 #ifdef DEBUG 495 qprintf("glob0:", patbuf); 496 #endif 497 498 if ((err = glob1(patbuf, pglob, limit)) != 0) 499 return(err); 500 501 /* 502 * If there was no match we are going to append the pattern 503 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 504 * and the pattern did not contain any magic characters 505 * GLOB_NOMAGIC is there just for compatibility with csh. 506 */ 507 if (pglob->gl_pathc == oldpathc) { 508 if (((pglob->gl_flags & GLOB_NOCHECK) || 509 ((pglob->gl_flags & GLOB_NOMAGIC) && 510 !(pglob->gl_flags & GLOB_MAGCHAR)))) 511 return(globextend(pattern, pglob, limit)); 512 else 513 return(GLOB_NOMATCH); 514 } 515 if (!(pglob->gl_flags & GLOB_NOSORT)) 516 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 517 pglob->gl_pathc - oldpathc, sizeof(char *), compare); 518 return(0); 519 } 520 521 static int 522 compare(const void *p, const void *q) 523 { 524 return(strcmp(*(const char * const *)p, *(const char * const *)q)); 525 } 526 527 static int 528 glob1(const Char *pattern, glob_t *pglob, size_t *limit) 529 { 530 Char pathbuf[MAXPATHLEN]; 531 532 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 533 if (*pattern == EOS) 534 return(0); 535 return(glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 1, 536 pattern, pglob, limit)); 537 } 538 539 /* 540 * The functions glob2 and glob3 are mutually recursive; there is one level 541 * of recursion for each segment in the pattern that contains one or more 542 * meta characters. 543 */ 544 static int 545 glob2(Char *pathbuf, Char *pathend, Char *pathend_last, const Char *pattern, 546 glob_t *pglob, size_t *limit) 547 { 548 struct stat sb; 549 const Char *p; 550 Char *q; 551 int anymeta; 552 553 /* 554 * Loop over pattern segments until end of pattern or until 555 * segment with meta character found. 556 */ 557 for (anymeta = 0;;) { 558 if (*pattern == EOS) { /* End of pattern? */ 559 *pathend = EOS; 560 if (g_lstat(pathbuf, &sb, pglob)) 561 return(0); 562 563 if (((pglob->gl_flags & GLOB_MARK) && 564 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) 565 || (S_ISLNK(sb.st_mode) && 566 (g_stat(pathbuf, &sb, pglob) == 0) && 567 S_ISDIR(sb.st_mode)))) { 568 if (pathend + 1 > pathend_last) 569 return (GLOB_ABORTED); 570 *pathend++ = SEP; 571 *pathend = EOS; 572 } 573 ++pglob->gl_matchc; 574 return(globextend(pathbuf, pglob, limit)); 575 } 576 577 /* Find end of next segment, copy tentatively to pathend. */ 578 q = pathend; 579 p = pattern; 580 while (*p != EOS && *p != SEP) { 581 if (ismeta(*p)) 582 anymeta = 1; 583 if (q + 1 > pathend_last) 584 return (GLOB_ABORTED); 585 *q++ = *p++; 586 } 587 588 if (!anymeta) { /* No expansion, do next segment. */ 589 pathend = q; 590 pattern = p; 591 while (*pattern == SEP) { 592 if (pathend + 1 > pathend_last) 593 return (GLOB_ABORTED); 594 *pathend++ = *pattern++; 595 } 596 } else /* Need expansion, recurse. */ 597 return(glob3(pathbuf, pathend, pathend_last, pattern, p, 598 pglob, limit)); 599 } 600 /* NOTREACHED */ 601 } 602 603 static int 604 glob3(Char *pathbuf, Char *pathend, Char *pathend_last, const Char *pattern, 605 const Char *restpattern, glob_t *pglob, size_t *limit) 606 { 607 struct dirent *dp; 608 DIR *dirp; 609 int err; 610 char buf[MAXPATHLEN]; 611 struct dirent *(*readdirfunc)(DIR *); 612 613 if (pathend > pathend_last) 614 return (GLOB_ABORTED); 615 *pathend = EOS; 616 errno = 0; 617 618 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 619 /* TODO: don't call for ENOENT or ENOTDIR? */ 620 if (pglob->gl_errfunc) { 621 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 622 return (GLOB_ABORTED); 623 if (pglob->gl_errfunc(buf, errno) || 624 pglob->gl_flags & GLOB_ERR) 625 return (GLOB_ABORTED); 626 } 627 return(0); 628 } 629 630 err = 0; 631 632 /* pglob->gl_readdir takes a void *, fix this manually. */ 633 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 634 readdirfunc = (struct dirent *(*)(DIR *))pglob->gl_readdir; 635 else 636 readdirfunc = readdir; 637 638 /* Search directory for matching names. */ 639 while ((dp = (*readdirfunc)(dirp)) != NULL) { 640 char *sc; 641 Char *dc; 642 wchar_t wc; 643 size_t clen; 644 mbstate_t mbs; 645 646 /* Initial DOT must be matched literally. */ 647 if (dp->d_name[0] == DOT && *pattern != DOT && 648 !(pglob->gl_flags & GLOB_PERIOD)) 649 continue; 650 memset(&mbs, 0, sizeof(mbs)); 651 dc = pathend; 652 sc = dp->d_name; 653 while (dc < pathend_last) { 654 clen = mbrtowc(&wc, sc, MB_LEN_MAX, &mbs); 655 if (clen == (size_t)-1 || clen == (size_t)-2) { 656 wc = *sc; 657 clen = 1; 658 memset(&mbs, 0, sizeof(mbs)); 659 } 660 if ((*dc++ = wc) == EOS) 661 break; 662 sc += clen; 663 } 664 if (!match(pathend, pattern, restpattern)) { 665 *pathend = EOS; 666 continue; 667 } 668 err = glob2(pathbuf, --dc, pathend_last, restpattern, 669 pglob, limit); 670 if (err) 671 break; 672 } 673 674 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 675 (*pglob->gl_closedir)(dirp); 676 else 677 closedir(dirp); 678 return(err); 679 } 680 681 682 /* 683 * Extend the gl_pathv member of a glob_t structure to accomodate a new item, 684 * add the new item, and update gl_pathc. 685 * 686 * This assumes the BSD realloc, which only copies the block when its size 687 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 688 * behavior. 689 * 690 * Return 0 if new item added, error code if memory couldn't be allocated. 691 * 692 * Invariant of the glob_t structure: 693 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 694 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 695 */ 696 static int 697 globextend(const Char *path, glob_t *pglob, size_t *limit) 698 { 699 char **pathv; 700 size_t i, newsize, len; 701 char *copy; 702 const Char *p; 703 704 if (*limit && pglob->gl_pathc > *limit) { 705 errno = 0; 706 return (GLOB_NOSPACE); 707 } 708 709 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 710 pathv = pglob->gl_pathv ? 711 realloc((char *)pglob->gl_pathv, newsize) : 712 malloc(newsize); 713 if (pathv == NULL) { 714 if (pglob->gl_pathv) { 715 free(pglob->gl_pathv); 716 pglob->gl_pathv = NULL; 717 } 718 return(GLOB_NOSPACE); 719 } 720 721 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 722 /* first time around -- clear initial gl_offs items */ 723 pathv += pglob->gl_offs; 724 for (i = pglob->gl_offs + 1; --i > 0; ) 725 *--pathv = NULL; 726 } 727 pglob->gl_pathv = pathv; 728 729 for (p = path; *p++;) 730 continue; 731 len = MB_CUR_MAX * (size_t)(p - path); /* XXX overallocation */ 732 if ((copy = malloc(len)) != NULL) { 733 if (g_Ctoc(path, copy, len)) { 734 free(copy); 735 return (GLOB_NOSPACE); 736 } 737 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 738 } 739 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 740 return(copy == NULL ? GLOB_NOSPACE : 0); 741 } 742 743 /* 744 * pattern matching function for filenames. Each occurrence of the * 745 * pattern causes a recursion level. 746 */ 747 static int 748 match(const Char * name, const Char *pat, const Char *patend) 749 { 750 int ok, negate_range; 751 Char c, k; 752 753 while (pat < patend) { 754 c = *pat++; 755 switch (c & M_MASK) { 756 case M_ALL: 757 if (pat == patend) 758 return(1); 759 do 760 if (match(name, pat, patend)) 761 return(1); 762 while (*name++ != EOS); 763 return(0); 764 case M_ONE: 765 if (*name++ == EOS) 766 return(0); 767 break; 768 case M_SET: 769 ok = 0; 770 if ((k = *name++) == EOS) 771 return(0); 772 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 773 ++pat; 774 while (((c = *pat++) & M_MASK) != M_END) 775 if ((*pat & M_MASK) == M_RNG) { 776 if (__collate_load_error ? 777 CHAR(c) <= CHAR(k) && CHAR(k) <= CHAR(pat[1]) : 778 __collate_range_cmp(CHAR(c), CHAR(k)) <= 0 779 && __collate_range_cmp(CHAR(k), CHAR(pat[1])) <= 0 780 ) 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(glob_t *pglob) 800 { 801 size_t i; 802 char **pp; 803 804 if (pglob->gl_pathv != NULL) { 805 pp = pglob->gl_pathv + pglob->gl_offs; 806 for (i = pglob->gl_pathc; i--; ++pp) 807 if (*pp) 808 free(*pp); 809 free(pglob->gl_pathv); 810 pglob->gl_pathv = NULL; 811 } 812 } 813 814 static DIR * 815 g_opendir(const Char *str, glob_t *pglob) 816 { 817 char buf[MAXPATHLEN]; 818 819 if (*str == '\0') 820 strcpy(buf, "."); 821 else if (g_Ctoc(str, buf, sizeof(buf))) 822 return (NULL); 823 824 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 825 return((*pglob->gl_opendir)(buf)); 826 827 return(opendir(buf)); 828 } 829 830 static int 831 g_lstat(const Char *fn, struct stat *sb, glob_t *pglob) 832 { 833 char buf[MAXPATHLEN]; 834 835 if (g_Ctoc(fn, buf, sizeof(buf))) { 836 errno = ENAMETOOLONG; 837 return (-1); 838 } 839 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 840 return((*pglob->gl_lstat)(buf, sb)); 841 return(lstat(buf, sb)); 842 } 843 844 static int 845 g_stat(const Char *fn, struct stat *sb, glob_t *pglob) 846 { 847 char buf[MAXPATHLEN]; 848 849 if (g_Ctoc(fn, buf, sizeof(buf))) { 850 errno = ENAMETOOLONG; 851 return (-1); 852 } 853 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 854 return((*pglob->gl_stat)(buf, sb)); 855 return(stat(buf, sb)); 856 } 857 858 static const Char * 859 g_strchr(const Char *str, wchar_t ch) 860 { 861 for (;; ++str) { 862 if (*str == ch) 863 return(str); 864 if (*str == '\0') 865 return(NULL); 866 } 867 } 868 869 static int 870 g_Ctoc(const Char *str, char *buf, size_t len) 871 { 872 mbstate_t mbs; 873 size_t clen; 874 875 memset(&mbs, 0, sizeof(mbs)); 876 while (len >= MB_CUR_MAX) { 877 clen = wcrtomb(buf, *str, &mbs); 878 if (clen == (size_t)-1) 879 return (1); 880 if (*str == L'\0') 881 return (0); 882 str++; 883 buf += clen; 884 len -= clen; 885 } 886 return (1); 887 } 888 889 #ifdef DEBUG 890 static void 891 qprintf(const char *str, const Char *s) 892 { 893 const Char *p; 894 895 printf("%s:\n", str); 896 for (p = s; *p; p++) 897 printf("%c", CHAR(*p)); 898 printf("\n"); 899 for (p = s; *p; p++) 900 printf("%c", *p & M_PROTECT ? '"' : ' '); 901 printf("\n"); 902 for (p = s; *p; p++) 903 printf("%c", ismeta(*p) ? '_' : ' '); 904 printf("\n"); 905 } 906 #endif 907