glob.c revision 1.27
1 /* $NetBSD: glob.c,v 1.27 2010/09/06 14:40:25 christos Exp $ */ 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 <sys/cdefs.h> 36 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93"; 39 #else 40 __RCSID("$NetBSD: glob.c,v 1.27 2010/09/06 14:40:25 christos Exp $"); 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 /* 45 * glob(3) -- a superset of the one defined in POSIX 1003.2. 46 * 47 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 48 * 49 * Optional extra services, controlled by flags not defined by POSIX: 50 * 51 * GLOB_MAGCHAR: 52 * Set in gl_flags if pattern contained a globbing character. 53 * GLOB_NOMAGIC: 54 * Same as GLOB_NOCHECK, but it will only append pattern if it did 55 * not contain any magic characters. [Used in csh style globbing] 56 * GLOB_ALTDIRFUNC: 57 * Use alternately specified directory access functions. 58 * GLOB_TILDE: 59 * expand ~user/foo to the /home/dir/of/user/foo 60 * GLOB_BRACE: 61 * expand {1,2}{a,b} to 1a 1b 2a 2b 62 * GLOB_PERIOD: 63 * allow metacharacters to match leading dots in filenames. 64 * GLOB_NO_DOTDIRS: 65 * . and .. are hidden from wildcards, even if GLOB_PERIOD is set. 66 * gl_matchc: 67 * Number of matches in the current invocation of glob. 68 */ 69 70 #include "namespace.h" 71 #include <sys/param.h> 72 #include <sys/stat.h> 73 74 #include <assert.h> 75 #include <ctype.h> 76 #include <dirent.h> 77 #include <errno.h> 78 #include <glob.h> 79 #include <pwd.h> 80 #include <stdio.h> 81 #include <stddef.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <unistd.h> 85 86 #ifdef HAVE_NBTOOL_CONFIG_H 87 #define NO_GETPW_R 88 #endif 89 90 #define GLOB_LIMIT_MALLOC 65536 91 #define GLOB_LIMIT_STAT 128 92 #define GLOB_LIMIT_READDIR 16384 93 94 #define GLOB_INDEX_MALLOC 0 95 #define GLOB_INDEX_STAT 1 96 #define GLOB_INDEX_READDIR 2 97 98 /* 99 * XXX: For NetBSD 1.4.x compatibility. (kill me l8r) 100 */ 101 #ifndef _DIAGASSERT 102 #define _DIAGASSERT(a) 103 #endif 104 105 #define DOLLAR '$' 106 #define DOT '.' 107 #define EOS '\0' 108 #define LBRACKET '[' 109 #define NOT '!' 110 #define QUESTION '?' 111 #define QUOTE '\\' 112 #define RANGE '-' 113 #define RBRACKET ']' 114 #define SEP '/' 115 #define STAR '*' 116 #define TILDE '~' 117 #define UNDERSCORE '_' 118 #define LBRACE '{' 119 #define RBRACE '}' 120 #define SLASH '/' 121 #define COMMA ',' 122 123 #ifndef USE_8BIT_CHARS 124 125 #define M_QUOTE 0x8000 126 #define M_PROTECT 0x4000 127 #define M_MASK 0xffff 128 #define M_ASCII 0x00ff 129 130 typedef u_short Char; 131 132 #else 133 134 #define M_QUOTE (Char)0x80 135 #define M_PROTECT (Char)0x40 136 #define M_MASK (Char)0xff 137 #define M_ASCII (Char)0x7f 138 139 typedef char Char; 140 141 #endif 142 143 144 #define CHAR(c) ((Char)((c)&M_ASCII)) 145 #define META(c) ((Char)((c)|M_QUOTE)) 146 #define M_ALL META('*') 147 #define M_END META(']') 148 #define M_NOT META('!') 149 #define M_ONE META('?') 150 #define M_RNG META('-') 151 #define M_SET META('[') 152 #define ismeta(c) (((c)&M_QUOTE) != 0) 153 154 155 static int compare(const void *, const void *); 156 static int g_Ctoc(const Char *, char *, size_t); 157 static int g_lstat(Char *, __gl_stat_t *, glob_t *); 158 static DIR *g_opendir(Char *, glob_t *); 159 static Char *g_strchr(const Char *, int); 160 static int g_stat(Char *, __gl_stat_t *, glob_t *); 161 static int glob0(const Char *, glob_t *, size_t *); 162 static int glob1(Char *, glob_t *, size_t *); 163 static int glob2(Char *, Char *, Char *, const Char *, glob_t *, 164 size_t *); 165 static int glob3(Char *, Char *, Char *, const Char *, const Char *, 166 const Char *, glob_t *, size_t *); 167 static int globextend(const Char *, glob_t *, size_t *); 168 static const Char *globtilde(const Char *, Char *, size_t, glob_t *); 169 static int globexp1(const Char *, glob_t *, size_t *); 170 static int globexp2(const Char *, const Char *, glob_t *, int *, 171 size_t *); 172 static int match(const Char *, const Char *, const Char *); 173 #ifdef DEBUG 174 static void qprintf(const char *, Char *); 175 #endif 176 177 int 178 glob(const char *pattern, int flags, int (*errfunc)(const char *, int), 179 glob_t *pglob) 180 { 181 const u_char *patnext; 182 int c; 183 Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 184 /* 0 = malloc(), 1 = stat(), 2 = readdir() */ 185 size_t limit[] = { 0, 0, 0 }; 186 187 _DIAGASSERT(pattern != NULL); 188 189 patnext = (const u_char *) pattern; 190 if (!(flags & GLOB_APPEND)) { 191 pglob->gl_pathc = 0; 192 pglob->gl_pathv = NULL; 193 if (!(flags & GLOB_DOOFFS)) 194 pglob->gl_offs = 0; 195 } 196 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 197 pglob->gl_errfunc = errfunc; 198 pglob->gl_matchc = 0; 199 200 bufnext = patbuf; 201 bufend = bufnext + MAXPATHLEN; 202 if (flags & GLOB_NOESCAPE) { 203 while (bufnext < bufend && (c = *patnext++) != EOS) 204 *bufnext++ = c; 205 } else { 206 /* Protect the quoted characters. */ 207 while (bufnext < bufend && (c = *patnext++) != EOS) 208 if (c == QUOTE) { 209 if ((c = *patnext++) == EOS) { 210 c = QUOTE; 211 --patnext; 212 } 213 *bufnext++ = c | M_PROTECT; 214 } 215 else 216 *bufnext++ = c; 217 } 218 *bufnext = EOS; 219 220 if (flags & GLOB_BRACE) 221 return globexp1(patbuf, pglob, limit); 222 else 223 return glob0(patbuf, pglob, limit); 224 } 225 226 /* 227 * Expand recursively a glob {} pattern. When there is no more expansion 228 * invoke the standard globbing routine to glob the rest of the magic 229 * characters 230 */ 231 static int 232 globexp1(const Char *pattern, glob_t *pglob, size_t *limit) 233 { 234 const Char* ptr = pattern; 235 int rv; 236 237 _DIAGASSERT(pattern != NULL); 238 _DIAGASSERT(pglob != NULL); 239 240 /* Protect a single {}, for find(1), like csh */ 241 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 242 return glob0(pattern, pglob, limit); 243 244 while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL) 245 if (!globexp2(ptr, pattern, pglob, &rv, limit)) 246 return rv; 247 248 return glob0(pattern, pglob, limit); 249 } 250 251 252 /* 253 * Recursive brace globbing helper. Tries to expand a single brace. 254 * If it succeeds then it invokes globexp1 with the new pattern. 255 * If it fails then it tries to glob the rest of the pattern and returns. 256 */ 257 static int 258 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv, 259 size_t *limit) 260 { 261 int i; 262 Char *lm, *ls; 263 const Char *pe, *pm, *pl; 264 Char patbuf[MAXPATHLEN + 1]; 265 266 _DIAGASSERT(ptr != NULL); 267 _DIAGASSERT(pattern != NULL); 268 _DIAGASSERT(pglob != NULL); 269 _DIAGASSERT(rv != NULL); 270 271 /* copy part up to the brace */ 272 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 273 continue; 274 ls = lm; 275 276 /* Find the balanced brace */ 277 for (i = 0, pe = ++ptr; *pe; pe++) 278 if (*pe == LBRACKET) { 279 /* Ignore everything between [] */ 280 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 281 continue; 282 if (*pe == EOS) { 283 /* 284 * We could not find a matching RBRACKET. 285 * Ignore and just look for RBRACE 286 */ 287 pe = pm; 288 } 289 } 290 else if (*pe == LBRACE) 291 i++; 292 else if (*pe == RBRACE) { 293 if (i == 0) 294 break; 295 i--; 296 } 297 298 /* Non matching braces; just glob the pattern */ 299 if (i != 0 || *pe == EOS) { 300 /* 301 * we use `pattern', not `patbuf' here so that that 302 * unbalanced braces are passed to the match 303 */ 304 *rv = glob0(pattern, pglob, limit); 305 return 0; 306 } 307 308 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 309 switch (*pm) { 310 case LBRACKET: 311 /* Ignore everything between [] */ 312 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 313 continue; 314 if (*pm == EOS) { 315 /* 316 * We could not find a matching RBRACKET. 317 * Ignore and just look for RBRACE 318 */ 319 pm = pl; 320 } 321 break; 322 323 case LBRACE: 324 i++; 325 break; 326 327 case RBRACE: 328 if (i) { 329 i--; 330 break; 331 } 332 /* FALLTHROUGH */ 333 case COMMA: 334 if (i && *pm == COMMA) 335 break; 336 else { 337 /* Append the current string */ 338 for (lm = ls; (pl < pm); *lm++ = *pl++) 339 continue; 340 /* 341 * Append the rest of the pattern after the 342 * closing brace 343 */ 344 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 345 continue; 346 347 /* Expand the current pattern */ 348 #ifdef DEBUG 349 qprintf("globexp2", patbuf); 350 #endif 351 *rv = globexp1(patbuf, pglob, limit); 352 353 /* move after the comma, to the next string */ 354 pl = pm + 1; 355 } 356 break; 357 358 default: 359 break; 360 } 361 } 362 *rv = 0; 363 return 0; 364 } 365 366 367 368 /* 369 * expand tilde from the passwd file. 370 */ 371 static const Char * 372 globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob) 373 { 374 struct passwd *pwd; 375 const char *h; 376 const Char *p; 377 Char *b; 378 char *d; 379 Char *pend = &patbuf[patsize / sizeof(Char)]; 380 #ifndef NO_GETPW_R 381 struct passwd pwres; 382 char pwbuf[1024]; 383 #endif 384 385 pend--; 386 387 _DIAGASSERT(pattern != NULL); 388 _DIAGASSERT(patbuf != NULL); 389 _DIAGASSERT(pglob != NULL); 390 391 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 392 return pattern; 393 394 /* Copy up to the end of the string or / */ 395 for (p = pattern + 1, d = (char *)(void *)patbuf; 396 d < (char *)(void *)pend && *p && *p != SLASH; 397 *d++ = *p++) 398 continue; 399 400 if (d == (char *)(void *)pend) 401 return NULL; 402 403 *d = EOS; 404 d = (char *)(void *)patbuf; 405 406 if (*d == EOS) { 407 /* 408 * handle a plain ~ or ~/ by expanding $HOME 409 * first and then trying the password file 410 */ 411 if ((h = getenv("HOME")) == NULL) { 412 #ifdef NO_GETPW_R 413 if ((pwd = getpwuid(getuid())) == NULL) 414 #else 415 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf), 416 &pwd) != 0 || pwd == NULL) 417 #endif 418 return pattern; 419 else 420 h = pwd->pw_dir; 421 } 422 } 423 else { 424 /* 425 * Expand a ~user 426 */ 427 #ifdef NO_GETPW_R 428 if ((pwd = getpwnam(d)) == NULL) 429 #else 430 if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 || 431 pwd == NULL) 432 #endif 433 return pattern; 434 else 435 h = pwd->pw_dir; 436 } 437 438 /* Copy the home directory */ 439 for (b = patbuf; b < pend && *h; *b++ = *h++) 440 continue; 441 442 if (b == pend) 443 return NULL; 444 445 /* Append the rest of the pattern */ 446 while (b < pend && (*b++ = *p++) != EOS) 447 continue; 448 449 if (b == pend) 450 return NULL; 451 452 return patbuf; 453 } 454 455 456 /* 457 * The main glob() routine: compiles the pattern (optionally processing 458 * quotes), calls glob1() to do the real pattern matching, and finally 459 * sorts the list (unless unsorted operation is requested). Returns 0 460 * if things went well, nonzero if errors occurred. It is not an error 461 * to find no matches. 462 */ 463 static int 464 glob0(const Char *pattern, glob_t *pglob, size_t *limit) 465 { 466 const Char *qpatnext; 467 int c, error; 468 __gl_size_t oldpathc; 469 Char *bufnext, patbuf[MAXPATHLEN+1]; 470 471 _DIAGASSERT(pattern != NULL); 472 _DIAGASSERT(pglob != NULL); 473 474 if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf), 475 pglob)) == NULL) 476 return GLOB_ABEND; 477 oldpathc = pglob->gl_pathc; 478 bufnext = patbuf; 479 480 /* We don't need to check for buffer overflow any more. */ 481 while ((c = *qpatnext++) != EOS) { 482 switch (c) { 483 case LBRACKET: 484 c = *qpatnext; 485 if (c == NOT) 486 ++qpatnext; 487 if (*qpatnext == EOS || 488 g_strchr(qpatnext+1, RBRACKET) == NULL) { 489 *bufnext++ = LBRACKET; 490 if (c == NOT) 491 --qpatnext; 492 break; 493 } 494 *bufnext++ = M_SET; 495 if (c == NOT) 496 *bufnext++ = M_NOT; 497 c = *qpatnext++; 498 do { 499 *bufnext++ = CHAR(c); 500 if (*qpatnext == RANGE && 501 (c = qpatnext[1]) != RBRACKET) { 502 *bufnext++ = M_RNG; 503 *bufnext++ = CHAR(c); 504 qpatnext += 2; 505 } 506 } while ((c = *qpatnext++) != RBRACKET); 507 pglob->gl_flags |= GLOB_MAGCHAR; 508 *bufnext++ = M_END; 509 break; 510 case QUESTION: 511 pglob->gl_flags |= GLOB_MAGCHAR; 512 *bufnext++ = M_ONE; 513 break; 514 case STAR: 515 pglob->gl_flags |= GLOB_MAGCHAR; 516 /* collapse adjacent stars to one [or three if globstar] 517 * to avoid exponential behavior 518 */ 519 if (bufnext == patbuf || bufnext[-1] != M_ALL || 520 ((pglob->gl_flags & GLOB_STAR) != 0 && 521 (bufnext - 1 == patbuf || bufnext[-2] != M_ALL || 522 bufnext - 2 == patbuf || bufnext[-3] != M_ALL))) 523 *bufnext++ = M_ALL; 524 break; 525 default: 526 *bufnext++ = CHAR(c); 527 break; 528 } 529 } 530 *bufnext = EOS; 531 #ifdef DEBUG 532 qprintf("glob0", patbuf); 533 #endif 534 535 if ((error = glob1(patbuf, pglob, limit)) != 0) 536 return error; 537 538 if (pglob->gl_pathc == oldpathc) { 539 /* 540 * If there was no match we are going to append the pattern 541 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was 542 * specified and the pattern did not contain any magic 543 * characters GLOB_NOMAGIC is there just for compatibility 544 * with csh. 545 */ 546 if ((pglob->gl_flags & GLOB_NOCHECK) || 547 ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR)) 548 == GLOB_NOMAGIC)) { 549 return globextend(pattern, pglob, limit); 550 } else { 551 return GLOB_NOMATCH; 552 } 553 } else if (!(pglob->gl_flags & GLOB_NOSORT)) { 554 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 555 (size_t)pglob->gl_pathc - oldpathc, sizeof(char *), 556 compare); 557 } 558 559 return 0; 560 } 561 562 static int 563 compare(const void *p, const void *q) 564 { 565 566 _DIAGASSERT(p != NULL); 567 _DIAGASSERT(q != NULL); 568 569 return strcoll(*(const char * const *)p, *(const char * const *)q); 570 } 571 572 static int 573 glob1(Char *pattern, glob_t *pglob, size_t *limit) 574 { 575 Char pathbuf[MAXPATHLEN+1]; 576 577 _DIAGASSERT(pattern != NULL); 578 _DIAGASSERT(pglob != NULL); 579 580 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 581 if (*pattern == EOS) 582 return 0; 583 /* 584 * we save one character so that we can use ptr >= limit, 585 * in the general case when we are appending non nul chars only. 586 */ 587 return glob2(pathbuf, pathbuf, 588 pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern, 589 pglob, limit); 590 } 591 592 /* 593 * The functions glob2 and glob3 are mutually recursive; there is one level 594 * of recursion for each segment in the pattern that contains one or more 595 * meta characters. 596 */ 597 static int 598 glob2(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern, 599 glob_t *pglob, size_t *limit) 600 { 601 __gl_stat_t sb; 602 const Char *p; 603 Char *q; 604 int anymeta; 605 Char *pend; 606 ptrdiff_t diff; 607 608 _DIAGASSERT(pathbuf != NULL); 609 _DIAGASSERT(pathend != NULL); 610 _DIAGASSERT(pattern != NULL); 611 _DIAGASSERT(pglob != NULL); 612 613 #ifdef DEBUG 614 qprintf("glob2", pathbuf); 615 #endif 616 /* 617 * Loop over pattern segments until end of pattern or until 618 * segment with meta character found. 619 */ 620 for (anymeta = 0;;) { 621 if (*pattern == EOS) { /* End of pattern? */ 622 *pathend = EOS; 623 if (g_lstat(pathbuf, &sb, pglob)) 624 return 0; 625 626 if ((pglob->gl_flags & GLOB_LIMIT) && 627 limit[GLOB_INDEX_STAT]++ >= GLOB_LIMIT_STAT) { 628 errno = 0; 629 *pathend++ = SEP; 630 *pathend = EOS; 631 return GLOB_NOSPACE; 632 } 633 if (((pglob->gl_flags & GLOB_MARK) && 634 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 635 (S_ISLNK(sb.st_mode) && 636 (g_stat(pathbuf, &sb, pglob) == 0) && 637 S_ISDIR(sb.st_mode)))) { 638 if (pathend >= pathlim) 639 return GLOB_ABORTED; 640 *pathend++ = SEP; 641 *pathend = EOS; 642 } 643 ++pglob->gl_matchc; 644 return globextend(pathbuf, pglob, limit); 645 } 646 647 /* Find end of next segment, copy tentatively to pathend. */ 648 q = pathend; 649 p = pattern; 650 while (*p != EOS && *p != SEP) { 651 if (ismeta(*p)) 652 anymeta = 1; 653 if (q >= pathlim) 654 return GLOB_ABORTED; 655 *q++ = *p++; 656 } 657 658 /* 659 * No expansion, or path ends in slash-dot shash-dot-dot, 660 * do next segment. 661 */ 662 if (pglob->gl_flags & GLOB_PERIOD) { 663 for (pend = pathend; pend > pathbuf && pend[-1] == '/'; 664 pend--) 665 continue; 666 diff = pend - pathbuf; 667 } else { 668 /* XXX: GCC */ 669 diff = 0; 670 pend = pathend; 671 } 672 673 if ((!anymeta) || 674 ((pglob->gl_flags & GLOB_PERIOD) && 675 (diff >= 1 && pend[-1] == DOT) && 676 (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) && 677 (diff < 3 || pend[-3] == SLASH))) { 678 pathend = q; 679 pattern = p; 680 while (*pattern == SEP) { 681 if (pathend >= pathlim) 682 return GLOB_ABORTED; 683 *pathend++ = *pattern++; 684 } 685 } else /* Need expansion, recurse. */ 686 return glob3(pathbuf, pathend, pathlim, pattern, p, 687 pattern, pglob, limit); 688 } 689 /* NOTREACHED */ 690 } 691 692 static int 693 glob3(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern, 694 const Char *restpattern, const Char *pglobstar, glob_t *pglob, 695 size_t *limit) 696 { 697 struct dirent *dp; 698 DIR *dirp; 699 __gl_stat_t sbuf; 700 int error; 701 char buf[MAXPATHLEN]; 702 int globstar = 0; 703 int chase_symlinks = 0; 704 const Char *termstar = NULL; 705 706 /* 707 * The readdirfunc declaration can't be prototyped, because it is 708 * assigned, below, to two functions which are prototyped in glob.h 709 * and dirent.h as taking pointers to differently typed opaque 710 * structures. 711 */ 712 struct dirent *(*readdirfunc)(void *); 713 714 _DIAGASSERT(pathbuf != NULL); 715 _DIAGASSERT(pathend != NULL); 716 _DIAGASSERT(pattern != NULL); 717 _DIAGASSERT(restpattern != NULL); 718 _DIAGASSERT(pglob != NULL); 719 720 *pathend = EOS; 721 errno = 0; 722 723 while (pglobstar < restpattern) { 724 if ((pglobstar[0] & M_MASK) == M_ALL && 725 (pglobstar[1] & M_MASK) == M_ALL) { 726 globstar = 1; 727 chase_symlinks = (pglobstar[2] & M_MASK) == M_ALL; 728 termstar = pglobstar + (2 + chase_symlinks); 729 break; 730 } 731 pglobstar++; 732 } 733 734 if (globstar) { 735 error = pglobstar == pattern && termstar == restpattern ? 736 *restpattern == EOS ? 737 glob2(pathbuf, pathend, pathlim, restpattern - 1, pglob, 738 limit) : 739 glob2(pathbuf, pathend, pathlim, restpattern + 1, pglob, 740 limit) : 741 glob3(pathbuf, pathend, pathlim, pattern, restpattern, 742 termstar, pglob, limit); 743 if (error) 744 return error; 745 *pathend = EOS; 746 } 747 748 if (*pathbuf && (g_lstat(pathbuf, &sbuf, pglob) || 749 !S_ISDIR(sbuf.st_mode) 750 #ifdef S_IFLINK 751 && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode)) 752 #endif 753 )) 754 return 0; 755 756 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 757 if (pglob->gl_errfunc) { 758 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 759 return GLOB_ABORTED; 760 if (pglob->gl_errfunc(buf, errno) || 761 pglob->gl_flags & GLOB_ERR) 762 return GLOB_ABORTED; 763 } 764 /* 765 * Posix/XOpen: glob should return when it encounters a 766 * directory that it cannot open or read 767 * XXX: Should we ignore ENOTDIR and ENOENT though? 768 * I think that Posix had in mind EPERM... 769 */ 770 if (pglob->gl_flags & GLOB_ERR) 771 return GLOB_ABORTED; 772 773 return 0; 774 } 775 776 error = 0; 777 778 /* Search directory for matching names. */ 779 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 780 readdirfunc = pglob->gl_readdir; 781 else 782 readdirfunc = (struct dirent *(*)__P((void *))) readdir; 783 while ((dp = (*readdirfunc)(dirp)) != NULL) { 784 u_char *sc; 785 Char *dc; 786 787 if ((pglob->gl_flags & GLOB_LIMIT) && 788 limit[GLOB_INDEX_READDIR]++ >= GLOB_LIMIT_READDIR) { 789 errno = 0; 790 *pathend++ = SEP; 791 *pathend = EOS; 792 return GLOB_NOSPACE; 793 } 794 795 /* 796 * Initial DOT must be matched literally, unless we have 797 * GLOB_PERIOD set. 798 */ 799 if ((pglob->gl_flags & GLOB_PERIOD) == 0) 800 if (dp->d_name[0] == DOT && *pattern != DOT) 801 continue; 802 /* 803 * If GLOB_NO_DOTDIRS is set, . and .. vanish. 804 */ 805 if ((pglob->gl_flags & GLOB_NO_DOTDIRS) && 806 (dp->d_name[0] == DOT) && 807 ((dp->d_name[1] == EOS) || 808 ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS)))) 809 continue; 810 /* 811 * The resulting string contains EOS, so we can 812 * use the pathlim character, if it is the nul 813 */ 814 for (sc = (u_char *) dp->d_name, dc = pathend; 815 dc <= pathlim && (*dc++ = *sc++) != EOS;) 816 continue; 817 818 /* 819 * Have we filled the buffer without seeing EOS? 820 */ 821 if (dc > pathlim && *pathlim != EOS) { 822 /* 823 * Abort when requested by caller, otherwise 824 * reset pathend back to last SEP and continue 825 * with next dir entry. 826 */ 827 if (pglob->gl_flags & GLOB_ERR) { 828 error = GLOB_ABORTED; 829 break; 830 } 831 else { 832 *pathend = EOS; 833 continue; 834 } 835 } 836 837 if (globstar) { 838 #ifdef S_IFLNK 839 if (!chase_symlinks && 840 (g_lstat(pathbuf, &sbuf, pglob) || 841 S_ISLNK(sbuf.st_mode))) 842 continue; 843 #endif 844 845 if (!match(pathend, pattern, termstar)) 846 continue; 847 848 if (--dc < pathlim - 2) 849 *dc++ = SEP; 850 *dc = EOS; 851 error = glob2(pathbuf, dc, pathlim, pglobstar, 852 pglob, limit); 853 if (error) 854 break; 855 *pathend = EOS; 856 } else { 857 if (!match(pathend, pattern, restpattern)) { 858 *pathend = EOS; 859 continue; 860 } 861 error = glob2(pathbuf, --dc, pathlim, restpattern, 862 pglob, limit); 863 if (error) 864 break; 865 } 866 } 867 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 868 (*pglob->gl_closedir)(dirp); 869 else 870 closedir(dirp); 871 872 /* 873 * Again Posix X/Open issue with regards to error handling. 874 */ 875 if ((error || errno) && (pglob->gl_flags & GLOB_ERR)) 876 return GLOB_ABORTED; 877 878 return error; 879 } 880 881 882 /* 883 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 884 * add the new item, and update gl_pathc. 885 * 886 * This assumes the BSD realloc, which only copies the block when its size 887 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 888 * behavior. 889 * 890 * Return 0 if new item added, error code if memory couldn't be allocated. 891 * 892 * Invariant of the glob_t structure: 893 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 894 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 895 */ 896 static int 897 globextend(const Char *path, glob_t *pglob, size_t *limit) 898 { 899 char **pathv; 900 size_t i, newsize, len; 901 char *copy; 902 const Char *p; 903 904 _DIAGASSERT(path != NULL); 905 _DIAGASSERT(pglob != NULL); 906 907 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 908 pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) : 909 malloc(newsize); 910 if (pathv == NULL) 911 return GLOB_NOSPACE; 912 913 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 914 /* first time around -- clear initial gl_offs items */ 915 pathv += pglob->gl_offs; 916 for (i = pglob->gl_offs + 1; --i > 0; ) 917 *--pathv = NULL; 918 } 919 pglob->gl_pathv = pathv; 920 921 for (p = path; *p++;) 922 continue; 923 len = (size_t)(p - path); 924 limit[GLOB_INDEX_MALLOC] += len; 925 if ((copy = malloc(len)) != NULL) { 926 if (g_Ctoc(path, copy, len)) { 927 free(copy); 928 return GLOB_ABORTED; 929 } 930 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 931 } 932 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 933 934 if ((pglob->gl_flags & GLOB_LIMIT) && 935 (newsize + limit[GLOB_INDEX_MALLOC]) >= GLOB_LIMIT_MALLOC) { 936 errno = 0; 937 return GLOB_NOSPACE; 938 } 939 940 return copy == NULL ? GLOB_NOSPACE : 0; 941 } 942 943 944 /* 945 * pattern matching function for filenames. Each occurrence of the * 946 * pattern causes a recursion level. 947 */ 948 static int 949 match(const Char *name, const Char *pat, const Char *patend) 950 { 951 int ok, negate_range; 952 Char c, k; 953 954 _DIAGASSERT(name != NULL); 955 _DIAGASSERT(pat != NULL); 956 _DIAGASSERT(patend != NULL); 957 958 while (pat < patend) { 959 c = *pat++; 960 switch (c & M_MASK) { 961 case M_ALL: 962 while (pat < patend && (*pat & M_MASK) == M_ALL) 963 pat++; /* eat consecutive '*' */ 964 if (pat == patend) 965 return 1; 966 for (; !match(name, pat, patend); name++) 967 if (*name == EOS) 968 return 0; 969 return 1; 970 case M_ONE: 971 if (*name++ == EOS) 972 return 0; 973 break; 974 case M_SET: 975 ok = 0; 976 if ((k = *name++) == EOS) 977 return 0; 978 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 979 ++pat; 980 while (((c = *pat++) & M_MASK) != M_END) 981 if ((*pat & M_MASK) == M_RNG) { 982 if (c <= k && k <= pat[1]) 983 ok = 1; 984 pat += 2; 985 } else if (c == k) 986 ok = 1; 987 if (ok == negate_range) 988 return 0; 989 break; 990 default: 991 if (*name++ != c) 992 return 0; 993 break; 994 } 995 } 996 return *name == EOS; 997 } 998 999 /* Free allocated data belonging to a glob_t structure. */ 1000 void 1001 globfree(glob_t *pglob) 1002 { 1003 size_t i; 1004 char **pp; 1005 1006 _DIAGASSERT(pglob != NULL); 1007 1008 if (pglob->gl_pathv != NULL) { 1009 pp = pglob->gl_pathv + pglob->gl_offs; 1010 for (i = pglob->gl_pathc; i--; ++pp) 1011 if (*pp) 1012 free(*pp); 1013 free(pglob->gl_pathv); 1014 pglob->gl_pathv = NULL; 1015 pglob->gl_pathc = 0; 1016 } 1017 } 1018 1019 #ifndef __LIBC12_SOURCE__ 1020 int 1021 glob_pattern_p(const char *pattern, int quote) 1022 { 1023 int range = 0; 1024 1025 for (; *pattern; pattern++) 1026 switch (*pattern) { 1027 case QUESTION: 1028 case STAR: 1029 return 1; 1030 1031 case QUOTE: 1032 if (quote && pattern[1] != EOS) 1033 ++pattern; 1034 break; 1035 1036 case LBRACKET: 1037 range = 1; 1038 break; 1039 1040 case RBRACKET: 1041 if (range) 1042 return 1; 1043 break; 1044 default: 1045 break; 1046 } 1047 1048 return 0; 1049 } 1050 #endif 1051 1052 static DIR * 1053 g_opendir(Char *str, glob_t *pglob) 1054 { 1055 char buf[MAXPATHLEN]; 1056 1057 _DIAGASSERT(str != NULL); 1058 _DIAGASSERT(pglob != NULL); 1059 1060 if (!*str) 1061 (void)strlcpy(buf, ".", sizeof(buf)); 1062 else { 1063 if (g_Ctoc(str, buf, sizeof(buf))) 1064 return NULL; 1065 } 1066 1067 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1068 return (*pglob->gl_opendir)(buf); 1069 1070 return opendir(buf); 1071 } 1072 1073 static int 1074 g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 1075 { 1076 char buf[MAXPATHLEN]; 1077 1078 _DIAGASSERT(fn != NULL); 1079 _DIAGASSERT(sb != NULL); 1080 _DIAGASSERT(pglob != NULL); 1081 1082 if (g_Ctoc(fn, buf, sizeof(buf))) 1083 return -1; 1084 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1085 return (*pglob->gl_lstat)(buf, sb); 1086 return lstat(buf, sb); 1087 } 1088 1089 static int 1090 g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 1091 { 1092 char buf[MAXPATHLEN]; 1093 1094 _DIAGASSERT(fn != NULL); 1095 _DIAGASSERT(sb != NULL); 1096 _DIAGASSERT(pglob != NULL); 1097 1098 if (g_Ctoc(fn, buf, sizeof(buf))) 1099 return -1; 1100 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1101 return (*pglob->gl_stat)(buf, sb); 1102 return stat(buf, sb); 1103 } 1104 1105 static Char * 1106 g_strchr(const Char *str, int ch) 1107 { 1108 1109 _DIAGASSERT(str != NULL); 1110 1111 do { 1112 if (*str == ch) 1113 return __UNCONST(str); 1114 } while (*str++); 1115 return NULL; 1116 } 1117 1118 static int 1119 g_Ctoc(const Char *str, char *buf, size_t len) 1120 { 1121 char *dc; 1122 1123 _DIAGASSERT(str != NULL); 1124 _DIAGASSERT(buf != NULL); 1125 1126 if (len == 0) 1127 return 1; 1128 1129 for (dc = buf; len && (*dc++ = *str++) != EOS; len--) 1130 continue; 1131 1132 return len == 0; 1133 } 1134 1135 #ifdef DEBUG 1136 static void 1137 qprintf(const char *str, Char *s) 1138 { 1139 Char *p; 1140 1141 _DIAGASSERT(str != NULL); 1142 _DIAGASSERT(s != NULL); 1143 1144 (void)printf("%s:\n", str); 1145 for (p = s; *p; p++) 1146 (void)printf("%c", CHAR(*p)); 1147 (void)printf("\n"); 1148 for (p = s; *p; p++) 1149 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 1150 (void)printf("\n"); 1151 for (p = s; *p; p++) 1152 (void)printf("%c", ismeta(*p) ? '_' : ' '); 1153 (void)printf("\n"); 1154 } 1155 #endif 1156
Indexes created Tue Sep 30 20:09:53 GMT 2025