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 33#if defined(LIBC_SCCS) && !defined(lint) 34static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; 35#endif /* LIBC_SCCS and not lint */ 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: src/lib/libc/gen/glob.c,v 1.28 2010/05/12 17:44:00 gordon Exp $"); 38 39#include "xlocale_private.h" 40 41/* 42 * glob(3) -- a superset of the one defined in POSIX 1003.2. 43 * 44 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 45 * 46 * Optional extra services, controlled by flags not defined by POSIX: 47 * 48 * GLOB_QUOTE: 49 * Escaping convention: \ inhibits any special meaning the following 50 * character might have (except \ at end of string is retained). 51 * GLOB_MAGCHAR: 52 * Set in gl_flags if pattern contained a globbing character. 53 * GLOB_NOMAGIC: 54 * Same as GLOB_NOCHECK, but it will only append pattern if it did 55 * not contain any magic characters. [Used in csh style globbing] 56 * GLOB_ALTDIRFUNC: 57 * Use alternately specified directory access functions. 58 * GLOB_TILDE: 59 * expand ~user/foo to the /home/dir/of/user/foo 60 * GLOB_BRACE: 61 * expand {1,2}{a,b} to 1a 1b 2a 2b 62 * gl_matchc: 63 * Number of matches in the current invocation of glob. 64 */ 65 66/* 67 * Some notes on multibyte character support: 68 * 1. Patterns with illegal byte sequences match nothing - even if 69 * GLOB_NOCHECK is specified. 70 * 2. Illegal byte sequences in filenames are handled by treating them as 71 * single-byte characters with a value of the first byte of the sequence 72 * cast to wchar_t. 73 * 3. State-dependent encodings are not currently supported. 74 */ 75 76#include <sys/param.h> 77#include <sys/stat.h> 78 79#include <ctype.h> 80#include <dirent.h> 81#include <errno.h> 82#include <glob.h> 83#include <limits.h> 84#include <pwd.h> 85#include <stdint.h> 86#include <stdio.h> 87#include <stdlib.h> 88#include <string.h> 89#include <unistd.h> 90#include <wchar.h> 91 92#include "collate.h" 93 94#define GLOB_LIMIT_STRING 65536 /* number of readdirs */ 95#define GLOB_LIMIT_STAT 128 /* number of stat system calls */ 96#define GLOB_LIMIT_READDIR 16384 /* total buffer size of path strings */ 97#define GLOB_LIMIT_PATH 1024 /* number of path elements */ 98#define GLOB_LIMIT_BRACE 128 /* Number of brace calls */ 99 100struct glob_limit { 101 size_t l_string; 102 size_t l_stat; 103 size_t l_readdir; 104 size_t l_brace; 105}; 106 107#define DOLLAR '$' 108#define DOT '.' 109#define EOS '\0' 110#define LBRACKET '[' 111#define NOT '!' 112#define QUESTION '?' 113#define QUOTE '\\' 114#define RANGE '-' 115#define RBRACKET ']' 116#define SEP '/' 117#define STAR '*' 118#define TILDE '~' 119#define UNDERSCORE '_' 120#define LBRACE '{' 121#define RBRACE '}' 122#define SLASH '/' 123#define COMMA ',' 124 125#ifndef DEBUG 126 127#define M_QUOTE 0x8000000000ULL 128#define M_PROTECT 0x4000000000ULL 129#define M_MASK 0xffffffffffULL 130#define M_CHAR 0x00ffffffffULL 131 132typedef uint_fast64_t Char; 133 134#else 135 136#define M_QUOTE 0x80 137#define M_PROTECT 0x40 138#define M_MASK 0xff 139#define M_CHAR 0x7f 140 141typedef char Char; 142 143#endif 144 145 146#define CHAR(c) ((Char)((c)&M_CHAR)) 147#define META(c) ((Char)((c)|M_QUOTE)) 148#define M_ALL META('*') 149#define M_END META(']') 150#define M_NOT META('!') 151#define M_ONE META('?') 152#define M_RNG META('-') 153#define M_SET META('[') 154#define ismeta(c) (((c)&M_QUOTE) != 0) 155 156 157#define compare __gl_compare 158#define g_Ctoc __gl_g_Ctoc 159#define g_strchr __gl_g_strchr 160#define globextend __gl_globextend 161#define globtilde __gl_globtilde 162#define match __gl_match 163__private_extern__ int compare(const void *, const void *); 164__private_extern__ int g_Ctoc(const Char *, char *, size_t, locale_t); 165__private_extern__ const Char *g_strchr(const Char *, wchar_t); 166__private_extern__ int globextend(const Char *, glob_t *, struct glob_limit *, locale_t); 167__private_extern__ const Char * 168 globtilde(const Char *, Char *, size_t, glob_t *); 169__private_extern__ int match(Char *, Char *, Char *, locale_t); 170 171 172static int g_lstat(Char *, struct stat *, glob_t *, locale_t); 173static DIR *g_opendir(Char *, glob_t *, locale_t); 174#ifdef notdef 175static Char *g_strcat(Char *, const Char *); 176#endif 177static int g_stat(Char *, struct stat *, glob_t *, locale_t); 178static int glob0(const Char *, glob_t *, struct glob_limit *, locale_t); 179static int glob1(Char *, glob_t *, struct glob_limit *, locale_t); 180static int glob2(Char *, Char *, Char *, Char *, glob_t *, struct glob_limit *, locale_t); 181static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *, struct glob_limit *, locale_t); 182static int globexp1(const Char *, glob_t *, struct glob_limit *, locale_t); 183static int globexp2(const Char *, const Char *, glob_t *, int *, struct glob_limit *, locale_t); 184#ifdef DEBUG 185static void qprintf(const char *, Char *); 186#endif 187 188static int 189__glob(const char *pattern, glob_t *pglob) 190{ 191 const char *patnext; 192 struct glob_limit limit = { 0, 0, 0, 0 }; 193 Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot; 194 mbstate_t mbs; 195 wchar_t wc; 196 size_t clen; 197 locale_t loc = __current_locale(); 198 int mb_cur_max = MB_CUR_MAX_L(loc); 199 200 patnext = pattern; 201 if (!(pglob->gl_flags & GLOB_APPEND)) { 202 pglob->gl_pathc = 0; 203 pglob->gl_pathv = NULL; 204 if (!(pglob->gl_flags & GLOB_DOOFFS)) 205 pglob->gl_offs = 0; 206 } 207 pglob->gl_matchc = 0; 208 209 bufnext = patbuf; 210 bufend = bufnext + MAXPATHLEN - 1; 211 if (pglob->gl_flags & GLOB_NOESCAPE) { 212 memset(&mbs, 0, sizeof(mbs)); 213 while (bufend - bufnext >= mb_cur_max) { 214 clen = mbrtowc_l(&wc, patnext, MB_LEN_MAX, &mbs, loc); 215 if (clen == (size_t)-1 || clen == (size_t)-2) 216 return (GLOB_NOMATCH); 217 else if (clen == 0) 218 break; 219 *bufnext++ = wc; 220 patnext += clen; 221 } 222 } else { 223 /* Protect the quoted characters. */ 224 memset(&mbs, 0, sizeof(mbs)); 225 while (bufend - bufnext >= mb_cur_max) { 226 if (*patnext == QUOTE) { 227 if (*++patnext == EOS) { 228 *bufnext++ = QUOTE | M_PROTECT; 229 continue; 230 } 231 prot = M_PROTECT; 232 } else 233 prot = 0; 234 clen = mbrtowc_l(&wc, patnext, MB_LEN_MAX, &mbs, loc); 235 if (clen == (size_t)-1 || clen == (size_t)-2) 236 return (GLOB_NOMATCH); 237 else if (clen == 0) 238 break; 239 *bufnext++ = wc | prot; 240 patnext += clen; 241 } 242 } 243 *bufnext = EOS; 244 245 if (pglob->gl_flags & GLOB_BRACE) 246 return globexp1(patbuf, pglob, &limit, loc); 247 else 248 return glob0(patbuf, pglob, &limit, loc); 249} 250 251int 252glob(const char *pattern, int flags, int (*errfunc)(const char *, int), glob_t *pglob) 253{ 254#ifdef __BLOCKS__ 255 pglob->gl_flags = flags & ~(GLOB_MAGCHAR | _GLOB_ERR_BLOCK); 256#else /* !__BLOCKS__ */ 257 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 258#endif /* __BLOCKS__ */ 259 pglob->gl_errfunc = errfunc; 260 return __glob(pattern, pglob); 261} 262 263#ifdef __BLOCKS__ 264int 265glob_b(const char *pattern, int flags, int (^errblk)(const char *, int), glob_t *pglob) 266{ 267 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 268 pglob->gl_flags |= _GLOB_ERR_BLOCK; 269 pglob->gl_errblk = errblk; 270 return __glob(pattern, pglob); 271} 272#endif /* __BLOCKS__ */ 273 274/* 275 * Expand recursively a glob {} pattern. When there is no more expansion 276 * invoke the standard globbing routine to glob the rest of the magic 277 * characters 278 */ 279static int 280globexp1(const Char *pattern, glob_t *pglob, struct glob_limit *limit, locale_t loc) 281{ 282 const Char* ptr = pattern; 283 int rv; 284 285 if ((pglob->gl_flags & GLOB_LIMIT) && 286 limit->l_brace++ >= GLOB_LIMIT_BRACE) { 287 errno = 0; 288 return GLOB_NOSPACE; 289 } 290 291 /* Protect a single {}, for find(1), like csh */ 292 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 293 return glob0(pattern, pglob, limit, loc); 294 295 while ((ptr = g_strchr(ptr, LBRACE)) != NULL) 296 if (!globexp2(ptr, pattern, pglob, &rv, limit, loc)) 297 return rv; 298 299 return glob0(pattern, pglob, limit, loc); 300} 301 302 303/* 304 * Recursive brace globbing helper. Tries to expand a single brace. 305 * If it succeeds then it invokes globexp1 with the new pattern. 306 * If it fails then it tries to glob the rest of the pattern and returns. 307 */ 308static int 309globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv, struct glob_limit *limit, locale_t loc) 310{ 311 int i; 312 Char *lm, *ls; 313 const Char *pe, *pm, *pm1, *pl; 314 Char patbuf[MAXPATHLEN]; 315 316 /* copy part up to the brace */ 317 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 318 continue; 319 *lm = EOS; 320 ls = lm; 321 322 /* Find the balanced brace */ 323 for (i = 0, pe = ++ptr; *pe; pe++) 324 if (*pe == LBRACKET) { 325 /* Ignore everything between [] */ 326 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 327 continue; 328 if (*pe == EOS) { 329 /* 330 * We could not find a matching RBRACKET. 331 * Ignore and just look for RBRACE 332 */ 333 pe = pm; 334 } 335 } 336 else if (*pe == LBRACE) 337 i++; 338 else if (*pe == RBRACE) { 339 if (i == 0) 340 break; 341 i--; 342 } 343 344 /* Non matching braces; just glob the pattern */ 345 if (i != 0 || *pe == EOS) { 346 *rv = glob0(patbuf, pglob, limit, loc); 347 return 0; 348 } 349 350 for (i = 0, pl = pm = ptr; pm <= pe; pm++) 351 switch (*pm) { 352 case LBRACKET: 353 /* Ignore everything between [] */ 354 for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++) 355 continue; 356 if (*pm == EOS) { 357 /* 358 * We could not find a matching RBRACKET. 359 * Ignore and just look for RBRACE 360 */ 361 pm = pm1; 362 } 363 break; 364 365 case LBRACE: 366 i++; 367 break; 368 369 case RBRACE: 370 if (i) { 371 i--; 372 break; 373 } 374 /* FALLTHROUGH */ 375 case COMMA: 376 if (i && *pm == COMMA) 377 break; 378 else { 379 /* Append the current string */ 380 for (lm = ls; (pl < pm); *lm++ = *pl++) 381 continue; 382 /* 383 * Append the rest of the pattern after the 384 * closing brace 385 */ 386 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 387 continue; 388 389 /* Expand the current pattern */ 390#ifdef DEBUG 391 qprintf("globexp2:", patbuf); 392#endif 393 *rv = globexp1(patbuf, pglob, limit, loc); 394 395 /* move after the comma, to the next string */ 396 pl = pm + 1; 397 } 398 break; 399 400 default: 401 break; 402 } 403 *rv = 0; 404 return 0; 405} 406 407 408 409#ifndef BUILDING_VARIANT 410/* 411 * expand tilde from the passwd file. 412 */ 413__private_extern__ const Char * 414globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob) 415{ 416 struct passwd *pwd; 417 char *h; 418 const Char *p; 419 Char *b, *eb; 420 421 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 422 return pattern; 423 424 /* 425 * Copy up to the end of the string or / 426 */ 427 eb = &patbuf[patbuf_len - 1]; 428 for (p = pattern + 1, h = (char *) patbuf; 429 h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 430 continue; 431 432 *h = EOS; 433 434 if (((char *) patbuf)[0] == EOS) { 435 /* 436 * handle a plain ~ or ~/ by expanding $HOME first (iff 437 * we're not running setuid or setgid) and then trying 438 * the password file 439 */ 440 if (issetugid() != 0 || 441 (h = getenv("HOME")) == NULL) { 442 if (((h = getlogin()) != NULL && 443 (pwd = getpwnam(h)) != NULL) || 444 (pwd = getpwuid(getuid())) != NULL) 445 h = pwd->pw_dir; 446 else 447 return pattern; 448 } 449 } 450 else { 451 /* 452 * Expand a ~user 453 */ 454 if ((pwd = getpwnam((char*) patbuf)) == NULL) 455 return pattern; 456 else 457 h = pwd->pw_dir; 458 } 459 460 /* Copy the home directory */ 461 for (b = patbuf; b < eb && *h; *b++ = *h++) 462 continue; 463 464 /* Append the rest of the pattern */ 465 while (b < eb && (*b++ = *p++) != EOS) 466 continue; 467 *b = EOS; 468 469 return patbuf; 470} 471#endif /* BUILDING_VARIANT */ 472 473 474/* 475 * The main glob() routine: compiles the pattern (optionally processing 476 * quotes), calls glob1() to do the real pattern matching, and finally 477 * sorts the list (unless unsorted operation is requested). Returns 0 478 * if things went well, nonzero if errors occurred. 479 */ 480static int 481glob0(const Char *pattern, glob_t *pglob, struct glob_limit *limit, locale_t loc) 482{ 483 const Char *qpatnext; 484 int err; 485 size_t oldpathc; 486 Char *bufnext, c, patbuf[MAXPATHLEN]; 487 488 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 489 oldpathc = pglob->gl_pathc; 490 bufnext = patbuf; 491 492 /* We don't need to check for buffer overflow any more. */ 493 while ((c = *qpatnext++) != EOS) { 494 if (c & M_PROTECT) { 495 *bufnext++ = CHAR(c); 496 continue; 497 } /* else */ 498 switch (c) { 499 case LBRACKET: 500 c = *qpatnext; 501 if (c == NOT) 502 ++qpatnext; 503 if (*qpatnext == EOS || 504 g_strchr(qpatnext+1, RBRACKET) == NULL) { 505 *bufnext++ = LBRACKET; 506 if (c == NOT) 507 --qpatnext; 508 break; 509 } 510 *bufnext++ = M_SET; 511 if (c == NOT) 512 *bufnext++ = M_NOT; 513 c = *qpatnext++; 514 do { 515 *bufnext++ = CHAR(c); 516 if (*qpatnext == RANGE && 517 (c = qpatnext[1]) != RBRACKET) { 518 *bufnext++ = M_RNG; 519 *bufnext++ = CHAR(c); 520 qpatnext += 2; 521 } 522 } while ((c = *qpatnext++) != RBRACKET); 523 pglob->gl_flags |= GLOB_MAGCHAR; 524 *bufnext++ = M_END; 525 break; 526 case QUESTION: 527 pglob->gl_flags |= GLOB_MAGCHAR; 528 *bufnext++ = M_ONE; 529 break; 530 case STAR: 531 pglob->gl_flags |= GLOB_MAGCHAR; 532 /* collapse adjacent stars to one, 533 * to avoid exponential behavior 534 */ 535 if (bufnext == patbuf || bufnext[-1] != M_ALL) 536 *bufnext++ = M_ALL; 537 break; 538 default: 539 *bufnext++ = CHAR(c); 540 break; 541 } 542 } 543 *bufnext = EOS; 544#ifdef DEBUG 545 qprintf("glob0:", patbuf); 546#endif 547 548 if ((err = glob1(patbuf, pglob, limit, loc)) != 0) 549 return(err); 550 551 /* 552 * If there was no match we are going to append the pattern 553 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 554 * and the pattern did not contain any magic characters 555 * GLOB_NOMAGIC is there just for compatibility with csh. 556 */ 557 if (pglob->gl_pathc == oldpathc) { 558 if (((pglob->gl_flags & GLOB_NOCHECK) || 559 ((pglob->gl_flags & GLOB_NOMAGIC) && 560 !(pglob->gl_flags & GLOB_MAGCHAR)))) 561 return(globextend(pattern, pglob, limit, loc)); 562 else 563 return(GLOB_NOMATCH); 564 } 565 if (!(pglob->gl_flags & GLOB_NOSORT)) 566 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 567 pglob->gl_pathc - oldpathc, sizeof(char *), compare); 568 return(0); 569} 570 571#ifndef BUILDING_VARIANT 572__private_extern__ int 573compare(const void *p, const void *q) 574{ 575 return(strcoll(*(char **)p, *(char **)q)); 576} 577#endif /* BUILDING_VARIANT */ 578 579static int 580glob1(Char *pattern, glob_t *pglob, struct glob_limit *limit, locale_t loc) 581{ 582 Char pathbuf[MAXPATHLEN]; 583 584 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 585 if (*pattern == EOS) 586 return(0); 587 return(glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 1, 588 pattern, pglob, limit, loc)); 589} 590 591/* 592 * The functions glob2 and glob3 are mutually recursive; there is one level 593 * of recursion for each segment in the pattern that contains one or more 594 * meta characters. 595 */ 596static int 597glob2(Char *pathbuf, Char *pathend, Char *pathend_last, Char *pattern, 598 glob_t *pglob, struct glob_limit *limit, locale_t loc) 599{ 600 struct stat sb; 601 Char *p, *q; 602 int anymeta; 603 604 /* 605 * Loop over pattern segments until end of pattern or until 606 * segment with meta character found. 607 */ 608 for (anymeta = 0;;) { 609 if (*pattern == EOS) { /* End of pattern? */ 610 *pathend = EOS; 611 if (g_lstat(pathbuf, &sb, pglob, loc)) 612 return(0); 613 614 if ((pglob->gl_flags & GLOB_LIMIT) && 615 limit->l_stat++ >= GLOB_LIMIT_STAT) { 616 errno = 0; 617 *pathend++ = SEP; 618 *pathend = EOS; 619 return GLOB_NOSPACE; 620 } 621 if (((pglob->gl_flags & GLOB_MARK) && 622 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) 623 || (S_ISLNK(sb.st_mode) && 624 (g_stat(pathbuf, &sb, pglob, loc) == 0) && 625 S_ISDIR(sb.st_mode)))) { 626 if (pathend + 1 > pathend_last) 627 return (GLOB_ABORTED); 628 *pathend++ = SEP; 629 *pathend = EOS; 630 } 631 ++pglob->gl_matchc; 632 return(globextend(pathbuf, pglob, limit, loc)); 633 } 634 635 /* Find end of next segment, copy tentatively to pathend. */ 636 q = pathend; 637 p = pattern; 638 while (*p != EOS && *p != SEP) { 639 if (ismeta(*p)) 640 anymeta = 1; 641 if (q + 1 > pathend_last) 642 return (GLOB_ABORTED); 643 *q++ = *p++; 644 } 645 646 if (!anymeta) { /* No expansion, do next segment. */ 647 pathend = q; 648 pattern = p; 649 while (*pattern == SEP) { 650 if (pathend + 1 > pathend_last) 651 return (GLOB_ABORTED); 652 *pathend++ = *pattern++; 653 } 654 } else /* Need expansion, recurse. */ 655 return(glob3(pathbuf, pathend, pathend_last, pattern, p, 656 pglob, limit, loc)); 657 } 658 /* NOTREACHED */ 659} 660 661static int 662glob3(Char *pathbuf, Char *pathend, Char *pathend_last, 663 Char *pattern, Char *restpattern, 664 glob_t *pglob, struct glob_limit *limit, locale_t loc) 665{ 666 struct dirent *dp; 667 DIR *dirp; 668 int err; 669 char buf[MAXPATHLEN]; 670 671 /* 672 * The readdirfunc declaration can't be prototyped, because it is 673 * assigned, below, to two functions which are prototyped in glob.h 674 * and dirent.h as taking pointers to differently typed opaque 675 * structures. 676 */ 677 struct dirent *(*readdirfunc)(); 678 679 if (pathend > pathend_last) 680 return (GLOB_ABORTED); 681 *pathend = EOS; 682 errno = 0; 683 684 if ((dirp = g_opendir(pathbuf, pglob, loc)) == NULL) { 685 /* TODO: don't call for ENOENT or ENOTDIR? */ 686 if (pglob->gl_errfunc) { 687 if (g_Ctoc(pathbuf, buf, sizeof(buf), loc)) 688 return (GLOB_ABORTED); 689#ifdef __BLOCKS__ 690 if (pglob->gl_flags & _GLOB_ERR_BLOCK) { 691 if (pglob->gl_errblk(buf, errno)) 692 return (GLOB_ABORTED); 693 } else 694#endif /* __BLOCKS__ */ 695 if (pglob->gl_errfunc(buf, errno)) 696 return (GLOB_ABORTED); 697 } 698 if (pglob->gl_flags & GLOB_ERR) 699 return (GLOB_ABORTED); 700 return(0); 701 } 702 703 err = 0; 704 705 /* Search directory for matching names. */ 706 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 707 readdirfunc = pglob->gl_readdir; 708 else 709 readdirfunc = readdir; 710 while ((dp = (*readdirfunc)(dirp))) { 711 char *sc; 712 Char *dc; 713 wchar_t wc; 714 size_t clen; 715 mbstate_t mbs; 716 717 if ((pglob->gl_flags & GLOB_LIMIT) && 718 limit->l_readdir++ >= GLOB_LIMIT_READDIR) { 719 errno = 0; 720 *pathend++ = SEP; 721 *pathend = EOS; 722 return GLOB_NOSPACE; 723 } 724 725 /* Initial DOT must be matched literally. */ 726 if (dp->d_name[0] == DOT && *pattern != DOT) 727 continue; 728 memset(&mbs, 0, sizeof(mbs)); 729 dc = pathend; 730 sc = dp->d_name; 731 while (dc < pathend_last) { 732 clen = mbrtowc_l(&wc, sc, MB_LEN_MAX, &mbs, loc); 733 if (clen == (size_t)-1 || clen == (size_t)-2) { 734 wc = *sc; 735 clen = 1; 736 memset(&mbs, 0, sizeof(mbs)); 737 } 738 if ((*dc++ = wc) == EOS) 739 break; 740 sc += clen; 741 } 742 if (!match(pathend, pattern, restpattern, loc)) { 743 *pathend = EOS; 744 continue; 745 } 746 err = glob2(pathbuf, --dc, pathend_last, restpattern, 747 pglob, limit, loc); 748 if (err) 749 break; 750 } 751 752 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 753 (*pglob->gl_closedir)(dirp); 754 else 755 closedir(dirp); 756 return(err); 757} 758 759 760#ifndef BUILDING_VARIANT 761/* 762 * Extend the gl_pathv member of a glob_t structure to accomodate a new item, 763 * add the new item, and update gl_pathc. 764 * 765 * This assumes the BSD realloc, which only copies the block when its size 766 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 767 * behavior. 768 * 769 * Return 0 if new item added, error code if memory couldn't be allocated. 770 * 771 * Invariant of the glob_t structure: 772 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 773 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 774 */ 775__private_extern__ int 776globextend(const Char *path, glob_t *pglob, struct glob_limit *limit, locale_t loc) 777{ 778 char **pathv; 779 size_t i, newsize, len; 780 char *copy; 781 const Char *p; 782 783 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 784 if ((pglob->gl_flags & GLOB_LIMIT) && 785 newsize > GLOB_LIMIT_PATH * sizeof(*pathv)) 786 goto nospace; 787 pathv = pglob->gl_pathv ? 788 realloc((char *)pglob->gl_pathv, newsize) : 789 malloc(newsize); 790 if (pathv == NULL) { 791 if (pglob->gl_pathv) { 792 free(pglob->gl_pathv); 793 pglob->gl_pathv = NULL; 794 } 795 return(GLOB_NOSPACE); 796 } 797 798 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 799 /* first time around -- clear initial gl_offs items */ 800 pathv += pglob->gl_offs; 801 for (i = pglob->gl_offs + 1; --i > 0; ) 802 *--pathv = NULL; 803 } 804 pglob->gl_pathv = pathv; 805 806 for (p = path; *p++;) 807 continue; 808 len = MB_CUR_MAX_L(loc) * (size_t)(p - path); /* XXX overallocation */ 809 limit->l_string += len; 810 if ((copy = malloc(len)) != NULL) { 811 if (g_Ctoc(path, copy, len, loc)) { 812 free(copy); 813 return (GLOB_NOSPACE); 814 } 815 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 816 } 817 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 818 819 if ((pglob->gl_flags & GLOB_LIMIT) && 820 (newsize + limit->l_string) >= GLOB_LIMIT_STRING) 821 goto nospace; 822 823 return(copy == NULL ? GLOB_NOSPACE : 0); 824nospace: 825 errno = 0; 826 return GLOB_NOSPACE; 827} 828 829/* 830 * pattern matching function for filenames. Each occurrence of the * 831 * pattern causes a recursion level. 832 */ 833__private_extern__ int 834match(Char *name, Char *pat, Char *patend, locale_t loc) 835{ 836 int ok, negate_range; 837 Char c, k; 838 839 while (pat < patend) { 840 c = *pat++; 841 switch (c & M_MASK) { 842 case M_ALL: 843 if (pat == patend) 844 return(1); 845 do 846 if (match(name, pat, patend, loc)) 847 return(1); 848 while (*name++ != EOS); 849 return(0); 850 case M_ONE: 851 if (*name++ == EOS) 852 return(0); 853 break; 854 case M_SET: 855 ok = 0; 856 if ((k = *name++) == EOS) 857 return(0); 858 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 859 ++pat; 860 while (((c = *pat++) & M_MASK) != M_END) 861 if ((*pat & M_MASK) == M_RNG) { 862 if (loc->__collate_load_error ? 863 CHAR(c) <= CHAR(k) && CHAR(k) <= CHAR(pat[1]) : 864 __collate_range_cmp(CHAR(c), CHAR(k), loc) <= 0 865 && __collate_range_cmp(CHAR(k), CHAR(pat[1]), loc) <= 0 866 ) 867 ok = 1; 868 pat += 2; 869 } else if (c == k) 870 ok = 1; 871 if (ok == negate_range) 872 return(0); 873 break; 874 default: 875 if (*name++ != c) 876 return(0); 877 break; 878 } 879 } 880 return(*name == EOS); 881} 882 883/* Free allocated data belonging to a glob_t structure. */ 884void 885globfree(glob_t *pglob) 886{ 887 size_t i; 888 char **pp; 889 890 if (pglob->gl_pathv != NULL) { 891 pp = pglob->gl_pathv + pglob->gl_offs; 892 for (i = pglob->gl_pathc; i--; ++pp) 893 if (*pp) 894 free(*pp); 895 free(pglob->gl_pathv); 896 pglob->gl_pathv = NULL; 897 } 898} 899#endif /* !BUILDING_VARIANT */ 900 901static DIR * 902g_opendir(Char *str, glob_t *pglob, locale_t loc) 903{ 904 char buf[MAXPATHLEN]; 905 906 if (!*str) 907 strcpy(buf, "."); 908 else { 909 if (g_Ctoc(str, buf, sizeof(buf), loc)) 910 return (NULL); 911 } 912 913 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 914 return((*pglob->gl_opendir)(buf)); 915 916 return(opendir(buf)); 917} 918 919static int 920g_lstat(Char *fn, struct stat *sb, glob_t *pglob, locale_t loc) 921{ 922 char buf[MAXPATHLEN]; 923 924 if (g_Ctoc(fn, buf, sizeof(buf), loc)) { 925 errno = ENAMETOOLONG; 926 return (-1); 927 } 928 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 929 return((*pglob->gl_lstat)(buf, sb)); 930 return(lstat(buf, sb)); 931} 932 933static int 934g_stat(Char *fn, struct stat *sb, glob_t *pglob, locale_t loc) 935{ 936 char buf[MAXPATHLEN]; 937 938 if (g_Ctoc(fn, buf, sizeof(buf), loc)) { 939 errno = ENAMETOOLONG; 940 return (-1); 941 } 942 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 943 return((*pglob->gl_stat)(buf, sb)); 944 return(stat(buf, sb)); 945} 946 947#ifndef BUILDING_VARIANT 948__private_extern__ const Char * 949g_strchr(const Char *str, wchar_t ch) 950{ 951 952 do { 953 if (*str == ch) 954 return (str); 955 } while (*str++); 956 return (NULL); 957} 958 959__private_extern__ int 960g_Ctoc(const Char *str, char *buf, size_t len, locale_t loc) 961{ 962 mbstate_t mbs; 963 size_t clen; 964 int mb_cur_max = MB_CUR_MAX_L(loc); 965 966 memset(&mbs, 0, sizeof(mbs)); 967 while (len >= mb_cur_max) { 968 clen = wcrtomb_l(buf, *str, &mbs, loc); 969 if (clen == (size_t)-1) 970 return (1); 971 if (*str == L'\0') 972 return (0); 973 str++; 974 buf += clen; 975 len -= clen; 976 } 977 return (1); 978} 979#endif /* !BUILDING_VARIANT */ 980 981#ifdef DEBUG 982static void 983qprintf(const char *str, Char *s) 984{ 985 Char *p; 986 987 (void)printf("%s:\n", str); 988 for (p = s; *p; p++) 989 (void)printf("%c", CHAR(*p)); 990 (void)printf("\n"); 991 for (p = s; *p; p++) 992 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 993 (void)printf("\n"); 994 for (p = s; *p; p++) 995 (void)printf("%c", ismeta(*p) ? '_' : ' '); 996 (void)printf("\n"); 997} 998#endif 999