glob.c revision 1.25
1 /* $NetBSD: glob.c,v 1.25 2010/07/02 21:13:10 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 1.25 2010/07/02 21:13:10 christos Exp $"); 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 /* 45 * glob(3) -- a superset of the one defined in POSIX 1003.2. 46 * 47 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 48 * 49 * Optional extra services, controlled by flags not defined by POSIX: 50 * 51 * GLOB_MAGCHAR: 52 * Set in gl_flags if pattern contained a globbing character. 53 * GLOB_NOMAGIC: 54 * Same as GLOB_NOCHECK, but it will only append pattern if it did 55 * not contain any magic characters. [Used in csh style globbing] 56 * GLOB_ALTDIRFUNC: 57 * Use alternately specified directory access functions. 58 * GLOB_TILDE: 59 * expand ~user/foo to the /home/dir/of/user/foo 60 * GLOB_BRACE: 61 * expand {1,2}{a,b} to 1a 1b 2a 2b 62 * GLOB_PERIOD: 63 * allow metacharacters to match leading dots in filenames. 64 * GLOB_NO_DOTDIRS: 65 * . and .. are hidden from wildcards, even if GLOB_PERIOD is set. 66 * gl_matchc: 67 * Number of matches in the current invocation of glob. 68 */ 69 70 #include "namespace.h" 71 #include <sys/param.h> 72 #include <sys/stat.h> 73 74 #include <assert.h> 75 #include <ctype.h> 76 #include <dirent.h> 77 #include <errno.h> 78 #include <glob.h> 79 #include <pwd.h> 80 #include <stdio.h> 81 #include <stddef.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <unistd.h> 85 86 #ifdef HAVE_NBTOOL_CONFIG_H 87 #define NO_GETPW_R 88 #endif 89 90 #if !defined(ARG_MAX) 91 #include <limits.h> 92 #define ARG_MAX _POSIX_ARG_MAX 93 #endif 94 95 /* 96 * XXX: For NetBSD 1.4.x compatibility. (kill me l8r) 97 */ 98 #ifndef _DIAGASSERT 99 #define _DIAGASSERT(a) 100 #endif 101 102 #define DOLLAR '$' 103 #define DOT '.' 104 #define EOS '\0' 105 #define LBRACKET '[' 106 #define NOT '!' 107 #define QUESTION '?' 108 #define QUOTE '\\' 109 #define RANGE '-' 110 #define RBRACKET ']' 111 #define SEP '/' 112 #define STAR '*' 113 #define TILDE '~' 114 #define UNDERSCORE '_' 115 #define LBRACE '{' 116 #define RBRACE '}' 117 #define SLASH '/' 118 #define COMMA ',' 119 120 #ifndef USE_8BIT_CHARS 121 122 #define M_QUOTE 0x8000 123 #define M_PROTECT 0x4000 124 #define M_MASK 0xffff 125 #define M_ASCII 0x00ff 126 127 typedef u_short Char; 128 129 #else 130 131 #define M_QUOTE (Char)0x80 132 #define M_PROTECT (Char)0x40 133 #define M_MASK (Char)0xff 134 #define M_ASCII (Char)0x7f 135 136 typedef char Char; 137 138 #endif 139 140 141 #define CHAR(c) ((Char)((c)&M_ASCII)) 142 #define META(c) ((Char)((c)|M_QUOTE)) 143 #define M_ALL META('*') 144 #define M_END META(']') 145 #define M_NOT META('!') 146 #define M_ONE META('?') 147 #define M_RNG META('-') 148 #define M_SET META('[') 149 #define ismeta(c) (((c)&M_QUOTE) != 0) 150 151 152 static int compare(const void *, const void *); 153 static int g_Ctoc(const Char *, char *, size_t); 154 static int g_lstat(Char *, __gl_stat_t *, glob_t *); 155 static DIR *g_opendir(Char *, glob_t *); 156 static Char *g_strchr(const Char *, int); 157 static int g_stat(Char *, __gl_stat_t *, glob_t *); 158 static int glob0(const Char *, glob_t *, size_t *); 159 static int glob1(Char *, glob_t *, size_t *); 160 static int glob2(Char *, Char *, Char *, Char *, glob_t *, 161 size_t *); 162 static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *, 163 size_t *); 164 static int globextend(const Char *, glob_t *, size_t *); 165 static const Char *globtilde(const Char *, Char *, size_t, glob_t *); 166 static int globexp1(const Char *, glob_t *, size_t *); 167 static int globexp2(const Char *, const Char *, glob_t *, int *, 168 size_t *); 169 static int match(Char *, Char *, Char *); 170 #ifdef DEBUG 171 static void qprintf(const char *, Char *); 172 #endif 173 174 int 175 glob(const char *pattern, int flags, int (*errfunc)(const char *, int), 176 glob_t *pglob) 177 { 178 const u_char *patnext; 179 int c; 180 Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 181 size_t limit = 0; 182 183 _DIAGASSERT(pattern != NULL); 184 185 patnext = (const u_char *) pattern; 186 if (!(flags & GLOB_APPEND)) { 187 pglob->gl_pathc = 0; 188 pglob->gl_pathv = NULL; 189 if (!(flags & GLOB_DOOFFS)) 190 pglob->gl_offs = 0; 191 } 192 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 193 pglob->gl_errfunc = errfunc; 194 pglob->gl_matchc = 0; 195 196 bufnext = patbuf; 197 bufend = bufnext + MAXPATHLEN; 198 if (flags & GLOB_NOESCAPE) { 199 while (bufnext < bufend && (c = *patnext++) != EOS) 200 *bufnext++ = c; 201 } else { 202 /* Protect the quoted characters. */ 203 while (bufnext < bufend && (c = *patnext++) != EOS) 204 if (c == QUOTE) { 205 if ((c = *patnext++) == EOS) { 206 c = QUOTE; 207 --patnext; 208 } 209 *bufnext++ = c | M_PROTECT; 210 } 211 else 212 *bufnext++ = c; 213 } 214 *bufnext = EOS; 215 216 if (flags & GLOB_BRACE) 217 return globexp1(patbuf, pglob, &limit); 218 else 219 return glob0(patbuf, pglob, &limit); 220 } 221 222 /* 223 * Expand recursively a glob {} pattern. When there is no more expansion 224 * invoke the standard globbing routine to glob the rest of the magic 225 * characters 226 */ 227 static int 228 globexp1(const Char *pattern, glob_t *pglob, size_t *limit) 229 { 230 const Char* ptr = pattern; 231 int rv; 232 233 _DIAGASSERT(pattern != NULL); 234 _DIAGASSERT(pglob != NULL); 235 236 /* Protect a single {}, for find(1), like csh */ 237 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 238 return glob0(pattern, pglob, limit); 239 240 while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL) 241 if (!globexp2(ptr, pattern, pglob, &rv, limit)) 242 return rv; 243 244 return glob0(pattern, pglob, limit); 245 } 246 247 248 /* 249 * Recursive brace globbing helper. Tries to expand a single brace. 250 * If it succeeds then it invokes globexp1 with the new pattern. 251 * If it fails then it tries to glob the rest of the pattern and returns. 252 */ 253 static int 254 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv, 255 size_t *limit) 256 { 257 int i; 258 Char *lm, *ls; 259 const Char *pe, *pm, *pl; 260 Char patbuf[MAXPATHLEN + 1]; 261 262 _DIAGASSERT(ptr != NULL); 263 _DIAGASSERT(pattern != NULL); 264 _DIAGASSERT(pglob != NULL); 265 _DIAGASSERT(rv != NULL); 266 267 /* copy part up to the brace */ 268 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 269 continue; 270 ls = lm; 271 272 /* Find the balanced brace */ 273 for (i = 0, pe = ++ptr; *pe; pe++) 274 if (*pe == LBRACKET) { 275 /* Ignore everything between [] */ 276 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 277 continue; 278 if (*pe == EOS) { 279 /* 280 * We could not find a matching RBRACKET. 281 * Ignore and just look for RBRACE 282 */ 283 pe = pm; 284 } 285 } 286 else if (*pe == LBRACE) 287 i++; 288 else if (*pe == RBRACE) { 289 if (i == 0) 290 break; 291 i--; 292 } 293 294 /* Non matching braces; just glob the pattern */ 295 if (i != 0 || *pe == EOS) { 296 /* 297 * we use `pattern', not `patbuf' here so that that 298 * unbalanced braces are passed to the match 299 */ 300 *rv = glob0(pattern, pglob, limit); 301 return 0; 302 } 303 304 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 305 switch (*pm) { 306 case LBRACKET: 307 /* Ignore everything between [] */ 308 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 309 continue; 310 if (*pm == EOS) { 311 /* 312 * We could not find a matching RBRACKET. 313 * Ignore and just look for RBRACE 314 */ 315 pm = pl; 316 } 317 break; 318 319 case LBRACE: 320 i++; 321 break; 322 323 case RBRACE: 324 if (i) { 325 i--; 326 break; 327 } 328 /* FALLTHROUGH */ 329 case COMMA: 330 if (i && *pm == COMMA) 331 break; 332 else { 333 /* Append the current string */ 334 for (lm = ls; (pl < pm); *lm++ = *pl++) 335 continue; 336 /* 337 * Append the rest of the pattern after the 338 * closing brace 339 */ 340 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 341 continue; 342 343 /* Expand the current pattern */ 344 #ifdef DEBUG 345 qprintf("globexp2:", patbuf); 346 #endif 347 *rv = globexp1(patbuf, pglob, limit); 348 349 /* move after the comma, to the next string */ 350 pl = pm + 1; 351 } 352 break; 353 354 default: 355 break; 356 } 357 } 358 *rv = 0; 359 return 0; 360 } 361 362 363 364 /* 365 * expand tilde from the passwd file. 366 */ 367 static const Char * 368 globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob) 369 { 370 struct passwd *pwd; 371 const char *h; 372 const Char *p; 373 Char *b; 374 char *d; 375 Char *pend = &patbuf[patsize / sizeof(Char)]; 376 #ifndef NO_GETPW_R 377 struct passwd pwres; 378 char pwbuf[1024]; 379 #endif 380 381 pend--; 382 383 _DIAGASSERT(pattern != NULL); 384 _DIAGASSERT(patbuf != NULL); 385 _DIAGASSERT(pglob != NULL); 386 387 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 388 return pattern; 389 390 /* Copy up to the end of the string or / */ 391 for (p = pattern + 1, d = (char *)(void *)patbuf; 392 d < (char *)(void *)pend && *p && *p != SLASH; 393 *d++ = *p++) 394 continue; 395 396 if (d == (char *)(void *)pend) 397 return NULL; 398 399 *d = EOS; 400 d = (char *)(void *)patbuf; 401 402 if (*d == EOS) { 403 /* 404 * handle a plain ~ or ~/ by expanding $HOME 405 * first and then trying the password file 406 */ 407 if ((h = getenv("HOME")) == NULL) { 408 #ifdef NO_GETPW_R 409 if ((pwd = getpwuid(getuid())) == NULL) 410 #else 411 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf), 412 &pwd) != 0 || pwd == NULL) 413 #endif 414 return pattern; 415 else 416 h = pwd->pw_dir; 417 } 418 } 419 else { 420 /* 421 * Expand a ~user 422 */ 423 #ifdef NO_GETPW_R 424 if ((pwd = getpwnam(d)) == NULL) 425 #else 426 if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 || 427 pwd == NULL) 428 #endif 429 return pattern; 430 else 431 h = pwd->pw_dir; 432 } 433 434 /* Copy the home directory */ 435 for (b = patbuf; b < pend && *h; *b++ = *h++) 436 continue; 437 438 if (b == pend) 439 return NULL; 440 441 /* Append the rest of the pattern */ 442 while (b < pend && (*b++ = *p++) != EOS) 443 continue; 444 445 if (b == pend) 446 return NULL; 447 448 return patbuf; 449 } 450 451 452 /* 453 * The main glob() routine: compiles the pattern (optionally processing 454 * quotes), calls glob1() to do the real pattern matching, and finally 455 * sorts the list (unless unsorted operation is requested). Returns 0 456 * if things went well, nonzero if errors occurred. It is not an error 457 * to find no matches. 458 */ 459 static int 460 glob0(const Char *pattern, glob_t *pglob, size_t *limit) 461 { 462 const Char *qpatnext; 463 int c, error; 464 __gl_size_t oldpathc; 465 Char *bufnext, patbuf[MAXPATHLEN+1]; 466 467 _DIAGASSERT(pattern != NULL); 468 _DIAGASSERT(pglob != NULL); 469 470 if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf), 471 pglob)) == NULL) 472 return GLOB_ABEND; 473 oldpathc = pglob->gl_pathc; 474 bufnext = patbuf; 475 476 /* We don't need to check for buffer overflow any more. */ 477 while ((c = *qpatnext++) != EOS) { 478 switch (c) { 479 case LBRACKET: 480 c = *qpatnext; 481 if (c == NOT) 482 ++qpatnext; 483 if (*qpatnext == EOS || 484 g_strchr(qpatnext+1, RBRACKET) == NULL) { 485 *bufnext++ = LBRACKET; 486 if (c == NOT) 487 --qpatnext; 488 break; 489 } 490 *bufnext++ = M_SET; 491 if (c == NOT) 492 *bufnext++ = M_NOT; 493 c = *qpatnext++; 494 do { 495 *bufnext++ = CHAR(c); 496 if (*qpatnext == RANGE && 497 (c = qpatnext[1]) != RBRACKET) { 498 *bufnext++ = M_RNG; 499 *bufnext++ = CHAR(c); 500 qpatnext += 2; 501 } 502 } while ((c = *qpatnext++) != RBRACKET); 503 pglob->gl_flags |= GLOB_MAGCHAR; 504 *bufnext++ = M_END; 505 break; 506 case QUESTION: 507 pglob->gl_flags |= GLOB_MAGCHAR; 508 *bufnext++ = M_ONE; 509 break; 510 case STAR: 511 pglob->gl_flags |= GLOB_MAGCHAR; 512 /* collapse adjacent stars to one, 513 * to avoid exponential behavior 514 */ 515 if (bufnext == patbuf || bufnext[-1] != M_ALL) 516 *bufnext++ = M_ALL; 517 break; 518 default: 519 *bufnext++ = CHAR(c); 520 break; 521 } 522 } 523 *bufnext = EOS; 524 #ifdef DEBUG 525 qprintf("glob0:", patbuf); 526 #endif 527 528 if ((error = glob1(patbuf, pglob, limit)) != 0) 529 return error; 530 531 if (pglob->gl_pathc == oldpathc) { 532 /* 533 * If there was no match we are going to append the pattern 534 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was 535 * specified and the pattern did not contain any magic 536 * characters GLOB_NOMAGIC is there just for compatibility 537 * with csh. 538 */ 539 if ((pglob->gl_flags & GLOB_NOCHECK) || 540 ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR)) 541 == GLOB_NOMAGIC)) { 542 return globextend(pattern, pglob, limit); 543 } else { 544 return GLOB_NOMATCH; 545 } 546 } else if (!(pglob->gl_flags & GLOB_NOSORT)) { 547 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 548 (size_t)pglob->gl_pathc - oldpathc, sizeof(char *), 549 compare); 550 } 551 552 return 0; 553 } 554 555 static int 556 compare(const void *p, const void *q) 557 { 558 559 _DIAGASSERT(p != NULL); 560 _DIAGASSERT(q != NULL); 561 562 return strcoll(*(const char * const *)p, *(const char * const *)q); 563 } 564 565 static int 566 glob1(Char *pattern, glob_t *pglob, size_t *limit) 567 { 568 Char pathbuf[MAXPATHLEN+1]; 569 570 _DIAGASSERT(pattern != NULL); 571 _DIAGASSERT(pglob != NULL); 572 573 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 574 if (*pattern == EOS) 575 return 0; 576 /* 577 * we save one character so that we can use ptr >= limit, 578 * in the general case when we are appending non nul chars only. 579 */ 580 return glob2(pathbuf, pathbuf, 581 pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern, 582 pglob, limit); 583 } 584 585 /* 586 * The functions glob2 and glob3 are mutually recursive; there is one level 587 * of recursion for each segment in the pattern that contains one or more 588 * meta characters. 589 */ 590 static int 591 glob2(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, glob_t *pglob, 592 size_t *limit) 593 { 594 __gl_stat_t sb; 595 Char *p, *q; 596 int anymeta; 597 Char *pend; 598 ptrdiff_t diff; 599 600 _DIAGASSERT(pathbuf != NULL); 601 _DIAGASSERT(pathend != NULL); 602 _DIAGASSERT(pattern != NULL); 603 _DIAGASSERT(pglob != NULL); 604 605 /* 606 * Loop over pattern segments until end of pattern or until 607 * segment with meta character found. 608 */ 609 for (anymeta = 0;;) { 610 if (*pattern == EOS) { /* End of pattern? */ 611 *pathend = EOS; 612 if (g_lstat(pathbuf, &sb, pglob)) 613 return 0; 614 615 if (((pglob->gl_flags & GLOB_MARK) && 616 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 617 (S_ISLNK(sb.st_mode) && 618 (g_stat(pathbuf, &sb, pglob) == 0) && 619 S_ISDIR(sb.st_mode)))) { 620 if (pathend >= pathlim) 621 return GLOB_ABORTED; 622 *pathend++ = SEP; 623 *pathend = EOS; 624 } 625 ++pglob->gl_matchc; 626 return globextend(pathbuf, pglob, limit); 627 } 628 629 /* Find end of next segment, copy tentatively to pathend. */ 630 q = pathend; 631 p = pattern; 632 while (*p != EOS && *p != SEP) { 633 if (ismeta(*p)) 634 anymeta = 1; 635 if (q >= pathlim) 636 return GLOB_ABORTED; 637 *q++ = *p++; 638 } 639 640 /* 641 * No expansion, or path ends in slash-dot shash-dot-dot, 642 * do next segment. 643 */ 644 if (pglob->gl_flags & GLOB_PERIOD) { 645 for (pend = pathend; pend > pathbuf && pend[-1] == '/'; 646 pend--) 647 continue; 648 diff = pend - pathbuf; 649 } else { 650 /* XXX: GCC */ 651 diff = 0; 652 pend = pathend; 653 } 654 655 if ((!anymeta) || 656 ((pglob->gl_flags & GLOB_PERIOD) && 657 (diff >= 1 && pend[-1] == DOT) && 658 (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) && 659 (diff < 3 || pend[-3] == SLASH))) { 660 pathend = q; 661 pattern = p; 662 while (*pattern == SEP) { 663 if (pathend >= pathlim) 664 return GLOB_ABORTED; 665 *pathend++ = *pattern++; 666 } 667 } else /* Need expansion, recurse. */ 668 return glob3(pathbuf, pathend, pathlim, pattern, p, 669 pglob, limit); 670 } 671 /* NOTREACHED */ 672 } 673 674 static int 675 glob3(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, 676 Char *restpattern, glob_t *pglob, size_t *limit) 677 { 678 struct dirent *dp; 679 DIR *dirp; 680 int error; 681 char buf[MAXPATHLEN]; 682 683 /* 684 * The readdirfunc declaration can't be prototyped, because it is 685 * assigned, below, to two functions which are prototyped in glob.h 686 * and dirent.h as taking pointers to differently typed opaque 687 * structures. 688 */ 689 struct dirent *(*readdirfunc)(void *); 690 691 _DIAGASSERT(pathbuf != NULL); 692 _DIAGASSERT(pathend != NULL); 693 _DIAGASSERT(pattern != NULL); 694 _DIAGASSERT(restpattern != NULL); 695 _DIAGASSERT(pglob != NULL); 696 697 *pathend = EOS; 698 errno = 0; 699 700 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 701 if (pglob->gl_errfunc) { 702 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 703 return GLOB_ABORTED; 704 if (pglob->gl_errfunc(buf, errno) || 705 pglob->gl_flags & GLOB_ERR) 706 return GLOB_ABORTED; 707 } 708 /* 709 * Posix/XOpen: glob should return when it encounters a 710 * directory that it cannot open or read 711 * XXX: Should we ignore ENOTDIR and ENOENT though? 712 * I think that Posix had in mind EPERM... 713 */ 714 if (pglob->gl_flags & GLOB_ERR) 715 return GLOB_ABORTED; 716 717 return 0; 718 } 719 720 error = 0; 721 722 /* Search directory for matching names. */ 723 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 724 readdirfunc = pglob->gl_readdir; 725 else 726 readdirfunc = (struct dirent *(*)__P((void *))) readdir; 727 while ((dp = (*readdirfunc)(dirp)) != NULL) { 728 u_char *sc; 729 Char *dc; 730 731 /* 732 * Initial DOT must be matched literally, unless we have 733 * GLOB_PERIOD set. 734 */ 735 if ((pglob->gl_flags & GLOB_PERIOD) == 0) 736 if (dp->d_name[0] == DOT && *pattern != DOT) 737 continue; 738 /* 739 * If GLOB_NO_DOTDIRS is set, . and .. vanish. 740 */ 741 if ((pglob->gl_flags & GLOB_NO_DOTDIRS) && 742 (dp->d_name[0] == DOT) && 743 ((dp->d_name[1] == EOS) || 744 ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS)))) 745 continue; 746 /* 747 * The resulting string contains EOS, so we can 748 * use the pathlim character, if it is the nul 749 */ 750 for (sc = (u_char *) dp->d_name, dc = pathend; 751 dc <= pathlim && (*dc++ = *sc++) != EOS;) 752 continue; 753 754 /* 755 * Have we filled the buffer without seeing EOS? 756 */ 757 if (dc > pathlim && *pathlim != EOS) { 758 /* 759 * Abort when requested by caller, otherwise 760 * reset pathend back to last SEP and continue 761 * with next dir entry. 762 */ 763 if (pglob->gl_flags & GLOB_ERR) { 764 error = GLOB_ABORTED; 765 break; 766 } 767 else { 768 *pathend = EOS; 769 continue; 770 } 771 } 772 773 if (!match(pathend, pattern, restpattern)) { 774 *pathend = EOS; 775 continue; 776 } 777 error = glob2(pathbuf, --dc, pathlim, restpattern, pglob, limit); 778 if (error) 779 break; 780 } 781 782 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 783 (*pglob->gl_closedir)(dirp); 784 else 785 closedir(dirp); 786 787 /* 788 * Again Posix X/Open issue with regards to error handling. 789 */ 790 if ((error || errno) && (pglob->gl_flags & GLOB_ERR)) 791 return GLOB_ABORTED; 792 793 return error; 794 } 795 796 797 /* 798 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 799 * add the new item, and update gl_pathc. 800 * 801 * This assumes the BSD realloc, which only copies the block when its size 802 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 803 * behavior. 804 * 805 * Return 0 if new item added, error code if memory couldn't be allocated. 806 * 807 * Invariant of the glob_t structure: 808 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 809 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 810 */ 811 static int 812 globextend(const Char *path, glob_t *pglob, size_t *limit) 813 { 814 char **pathv; 815 size_t i, newsize, len; 816 char *copy; 817 const Char *p; 818 819 _DIAGASSERT(path != NULL); 820 _DIAGASSERT(pglob != NULL); 821 822 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 823 pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) : 824 malloc(newsize); 825 if (pathv == NULL) 826 return GLOB_NOSPACE; 827 828 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 829 /* first time around -- clear initial gl_offs items */ 830 pathv += pglob->gl_offs; 831 for (i = pglob->gl_offs + 1; --i > 0; ) 832 *--pathv = NULL; 833 } 834 pglob->gl_pathv = pathv; 835 836 for (p = path; *p++;) 837 continue; 838 len = (size_t)(p - path); 839 *limit += len; 840 if ((copy = malloc(len)) != NULL) { 841 if (g_Ctoc(path, copy, len)) { 842 free(copy); 843 return GLOB_ABORTED; 844 } 845 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 846 } 847 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 848 849 if ((pglob->gl_flags & GLOB_LIMIT) && (newsize + *limit) >= ARG_MAX) { 850 errno = 0; 851 return GLOB_NOSPACE; 852 } 853 854 return copy == NULL ? GLOB_NOSPACE : 0; 855 } 856 857 858 /* 859 * pattern matching function for filenames. Each occurrence of the * 860 * pattern causes a recursion level. 861 */ 862 static int 863 match(Char *name, Char *pat, Char *patend) 864 { 865 int ok, negate_range; 866 Char c, k; 867 868 _DIAGASSERT(name != NULL); 869 _DIAGASSERT(pat != NULL); 870 _DIAGASSERT(patend != NULL); 871 872 while (pat < patend) { 873 c = *pat++; 874 switch (c & M_MASK) { 875 case M_ALL: 876 if (pat == patend) 877 return 1; 878 do 879 if (match(name, pat, patend)) 880 return 1; 881 while (*name++ != EOS); 882 return 0; 883 case M_ONE: 884 if (*name++ == EOS) 885 return 0; 886 break; 887 case M_SET: 888 ok = 0; 889 if ((k = *name++) == EOS) 890 return 0; 891 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 892 ++pat; 893 while (((c = *pat++) & M_MASK) != M_END) 894 if ((*pat & M_MASK) == M_RNG) { 895 if (c <= k && k <= pat[1]) 896 ok = 1; 897 pat += 2; 898 } else if (c == k) 899 ok = 1; 900 if (ok == negate_range) 901 return 0; 902 break; 903 default: 904 if (*name++ != c) 905 return 0; 906 break; 907 } 908 } 909 return *name == EOS; 910 } 911 912 /* Free allocated data belonging to a glob_t structure. */ 913 void 914 globfree(glob_t *pglob) 915 { 916 size_t i; 917 char **pp; 918 919 _DIAGASSERT(pglob != NULL); 920 921 if (pglob->gl_pathv != NULL) { 922 pp = pglob->gl_pathv + pglob->gl_offs; 923 for (i = pglob->gl_pathc; i--; ++pp) 924 if (*pp) 925 free(*pp); 926 free(pglob->gl_pathv); 927 pglob->gl_pathv = NULL; 928 pglob->gl_pathc = 0; 929 } 930 } 931 932 #ifndef __LIBC12_SOURCE__ 933 int 934 glob_pattern_p(const char *pattern, int quote) 935 { 936 int range = 0; 937 938 for (; *pattern; pattern++) 939 switch (*pattern) { 940 case QUESTION: 941 case STAR: 942 return 1; 943 944 case QUOTE: 945 if (quote && pattern[1] != '\0') 946 ++pattern; 947 break; 948 949 case LBRACKET: 950 range = 1; 951 break; 952 953 case RBRACKET: 954 if (range) 955 return 1; 956 break; 957 default: 958 break; 959 } 960 961 return 0; 962 } 963 #endif 964 965 static DIR * 966 g_opendir(Char *str, glob_t *pglob) 967 { 968 char buf[MAXPATHLEN]; 969 970 _DIAGASSERT(str != NULL); 971 _DIAGASSERT(pglob != NULL); 972 973 if (!*str) 974 (void)strlcpy(buf, ".", sizeof(buf)); 975 else { 976 if (g_Ctoc(str, buf, sizeof(buf))) 977 return NULL; 978 } 979 980 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 981 return (*pglob->gl_opendir)(buf); 982 983 return opendir(buf); 984 } 985 986 static int 987 g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 988 { 989 char buf[MAXPATHLEN]; 990 991 _DIAGASSERT(fn != NULL); 992 _DIAGASSERT(sb != NULL); 993 _DIAGASSERT(pglob != NULL); 994 995 if (g_Ctoc(fn, buf, sizeof(buf))) 996 return -1; 997 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 998 return (*pglob->gl_lstat)(buf, sb); 999 return lstat(buf, sb); 1000 } 1001 1002 static int 1003 g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 1004 { 1005 char buf[MAXPATHLEN]; 1006 1007 _DIAGASSERT(fn != NULL); 1008 _DIAGASSERT(sb != NULL); 1009 _DIAGASSERT(pglob != NULL); 1010 1011 if (g_Ctoc(fn, buf, sizeof(buf))) 1012 return -1; 1013 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1014 return (*pglob->gl_stat)(buf, sb); 1015 return stat(buf, sb); 1016 } 1017 1018 static Char * 1019 g_strchr(const Char *str, int ch) 1020 { 1021 1022 _DIAGASSERT(str != NULL); 1023 1024 do { 1025 if (*str == ch) 1026 return __UNCONST(str); 1027 } while (*str++); 1028 return NULL; 1029 } 1030 1031 static int 1032 g_Ctoc(const Char *str, char *buf, size_t len) 1033 { 1034 char *dc; 1035 1036 _DIAGASSERT(str != NULL); 1037 _DIAGASSERT(buf != NULL); 1038 1039 if (len == 0) 1040 return 1; 1041 1042 for (dc = buf; len && (*dc++ = *str++) != EOS; len--) 1043 continue; 1044 1045 return len == 0; 1046 } 1047 1048 #ifdef DEBUG 1049 static void 1050 qprintf(const char *str, Char *s) 1051 { 1052 Char *p; 1053 1054 _DIAGASSERT(str != NULL); 1055 _DIAGASSERT(s != NULL); 1056 1057 (void)printf("%s:\n", str); 1058 for (p = s; *p; p++) 1059 (void)printf("%c", CHAR(*p)); 1060 (void)printf("\n"); 1061 for (p = s; *p; p++) 1062 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 1063 (void)printf("\n"); 1064 for (p = s; *p; p++) 1065 (void)printf("%c", ismeta(*p) ? '_' : ' '); 1066 (void)printf("\n"); 1067 } 1068 #endif 1069
Indexes created Tue Sep 30 20:09:53 GMT 2025