glob.c revision 1.21
1 /* $NetBSD: glob.c,v 1.21 2008/02/01 23:29:54 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 1.21 2008/02/01 23:29:54 christos Exp $"); 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 /* 45 * glob(3) -- a superset of the one defined in POSIX 1003.2. 46 * 47 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 48 * 49 * Optional extra services, controlled by flags not defined by POSIX: 50 * 51 * GLOB_MAGCHAR: 52 * Set in gl_flags if pattern contained a globbing character. 53 * GLOB_NOMAGIC: 54 * Same as GLOB_NOCHECK, but it will only append pattern if it did 55 * not contain any magic characters. [Used in csh style globbing] 56 * GLOB_ALTDIRFUNC: 57 * Use alternately specified directory access functions. 58 * GLOB_TILDE: 59 * expand ~user/foo to the /home/dir/of/user/foo 60 * GLOB_BRACE: 61 * expand {1,2}{a,b} to 1a 1b 2a 2b 62 * GLOB_PERIOD: 63 * allow metacharacters to match leading dots in filenames. 64 * gl_matchc: 65 * Number of matches in the current invocation of glob. 66 */ 67 68 #include "namespace.h" 69 #include <sys/param.h> 70 #include <sys/stat.h> 71 72 #include <assert.h> 73 #include <ctype.h> 74 #include <dirent.h> 75 #include <errno.h> 76 #include <glob.h> 77 #include <pwd.h> 78 #include <stdio.h> 79 #include <stddef.h> 80 #include <stdlib.h> 81 #include <string.h> 82 #include <unistd.h> 83 84 #ifdef HAVE_NBTOOL_CONFIG_H 85 #define NO_GETPW_R 86 #endif 87 88 /* 89 * XXX: For NetBSD 1.4.x compatibility. (kill me l8r) 90 */ 91 #ifndef _DIAGASSERT 92 #define _DIAGASSERT(a) 93 #endif 94 95 #define DOLLAR '$' 96 #define DOT '.' 97 #define EOS '\0' 98 #define LBRACKET '[' 99 #define NOT '!' 100 #define QUESTION '?' 101 #define QUOTE '\\' 102 #define RANGE '-' 103 #define RBRACKET ']' 104 #define SEP '/' 105 #define STAR '*' 106 #define TILDE '~' 107 #define UNDERSCORE '_' 108 #define LBRACE '{' 109 #define RBRACE '}' 110 #define SLASH '/' 111 #define COMMA ',' 112 113 #ifndef USE_8BIT_CHARS 114 115 #define M_QUOTE 0x8000 116 #define M_PROTECT 0x4000 117 #define M_MASK 0xffff 118 #define M_ASCII 0x00ff 119 120 typedef u_short Char; 121 122 #else 123 124 #define M_QUOTE (Char)0x80 125 #define M_PROTECT (Char)0x40 126 #define M_MASK (Char)0xff 127 #define M_ASCII (Char)0x7f 128 129 typedef char Char; 130 131 #endif 132 133 134 #define CHAR(c) ((Char)((c)&M_ASCII)) 135 #define META(c) ((Char)((c)|M_QUOTE)) 136 #define M_ALL META('*') 137 #define M_END META(']') 138 #define M_NOT META('!') 139 #define M_ONE META('?') 140 #define M_RNG META('-') 141 #define M_SET META('[') 142 #define ismeta(c) (((c)&M_QUOTE) != 0) 143 144 145 static int compare(const void *, const void *); 146 static int g_Ctoc(const Char *, char *, size_t); 147 static int g_lstat(Char *, __gl_stat_t *, glob_t *); 148 static DIR *g_opendir(Char *, glob_t *); 149 static Char *g_strchr(const Char *, int); 150 static int g_stat(Char *, __gl_stat_t *, glob_t *); 151 static int glob0(const Char *, glob_t *); 152 static int glob1(Char *, glob_t *, size_t *); 153 static int glob2(Char *, Char *, Char *, Char *, glob_t *, 154 size_t *); 155 static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *, 156 size_t *); 157 static int globextend(const Char *, glob_t *, size_t *); 158 static const Char *globtilde(const Char *, Char *, size_t, glob_t *); 159 static int globexp1(const Char *, glob_t *); 160 static int globexp2(const Char *, const Char *, glob_t *, int *); 161 static int match(Char *, Char *, Char *); 162 #ifdef DEBUG 163 static void qprintf(const char *, Char *); 164 #endif 165 166 int 167 glob(const char *pattern, int flags, int (*errfunc)(const char *, int), 168 glob_t *pglob) 169 { 170 const u_char *patnext; 171 int c; 172 Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 173 174 _DIAGASSERT(pattern != NULL); 175 176 patnext = (const u_char *) 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 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 184 pglob->gl_errfunc = errfunc; 185 pglob->gl_matchc = 0; 186 187 bufnext = patbuf; 188 bufend = bufnext + MAXPATHLEN; 189 if (flags & GLOB_NOESCAPE) { 190 while (bufnext < bufend && (c = *patnext++) != EOS) 191 *bufnext++ = c; 192 } else { 193 /* Protect the quoted characters. */ 194 while (bufnext < bufend && (c = *patnext++) != EOS) 195 if (c == QUOTE) { 196 if ((c = *patnext++) == EOS) { 197 c = QUOTE; 198 --patnext; 199 } 200 *bufnext++ = c | M_PROTECT; 201 } 202 else 203 *bufnext++ = c; 204 } 205 *bufnext = EOS; 206 207 if (flags & GLOB_BRACE) 208 return globexp1(patbuf, pglob); 209 else 210 return glob0(patbuf, pglob); 211 } 212 213 /* 214 * Expand recursively a glob {} pattern. When there is no more expansion 215 * invoke the standard globbing routine to glob the rest of the magic 216 * characters 217 */ 218 static int 219 globexp1(const Char *pattern, glob_t *pglob) 220 { 221 const Char* ptr = pattern; 222 int rv; 223 224 _DIAGASSERT(pattern != NULL); 225 _DIAGASSERT(pglob != NULL); 226 227 /* Protect a single {}, for find(1), like csh */ 228 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 229 return glob0(pattern, pglob); 230 231 while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL) 232 if (!globexp2(ptr, pattern, pglob, &rv)) 233 return rv; 234 235 return glob0(pattern, pglob); 236 } 237 238 239 /* 240 * Recursive brace globbing helper. Tries to expand a single brace. 241 * If it succeeds then it invokes globexp1 with the new pattern. 242 * If it fails then it tries to glob the rest of the pattern and returns. 243 */ 244 static int 245 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv) 246 { 247 int i; 248 Char *lm, *ls; 249 const Char *pe, *pm, *pl; 250 Char patbuf[MAXPATHLEN + 1]; 251 252 _DIAGASSERT(ptr != NULL); 253 _DIAGASSERT(pattern != NULL); 254 _DIAGASSERT(pglob != NULL); 255 _DIAGASSERT(rv != NULL); 256 257 /* copy part up to the brace */ 258 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 259 continue; 260 ls = lm; 261 262 /* Find the balanced brace */ 263 for (i = 0, pe = ++ptr; *pe; pe++) 264 if (*pe == LBRACKET) { 265 /* Ignore everything between [] */ 266 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 267 continue; 268 if (*pe == EOS) { 269 /* 270 * We could not find a matching RBRACKET. 271 * Ignore and just look for RBRACE 272 */ 273 pe = pm; 274 } 275 } 276 else if (*pe == LBRACE) 277 i++; 278 else if (*pe == RBRACE) { 279 if (i == 0) 280 break; 281 i--; 282 } 283 284 /* Non matching braces; just glob the pattern */ 285 if (i != 0 || *pe == EOS) { 286 /* 287 * we use `pattern', not `patbuf' here so that that 288 * unbalanced braces are passed to the match 289 */ 290 *rv = glob0(pattern, pglob); 291 return 0; 292 } 293 294 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 295 switch (*pm) { 296 case LBRACKET: 297 /* Ignore everything between [] */ 298 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 299 continue; 300 if (*pm == EOS) { 301 /* 302 * We could not find a matching RBRACKET. 303 * Ignore and just look for RBRACE 304 */ 305 pm = pl; 306 } 307 break; 308 309 case LBRACE: 310 i++; 311 break; 312 313 case RBRACE: 314 if (i) { 315 i--; 316 break; 317 } 318 /* FALLTHROUGH */ 319 case COMMA: 320 if (i && *pm == COMMA) 321 break; 322 else { 323 /* Append the current string */ 324 for (lm = ls; (pl < pm); *lm++ = *pl++) 325 continue; 326 /* 327 * Append the rest of the pattern after the 328 * closing brace 329 */ 330 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 331 continue; 332 333 /* Expand the current pattern */ 334 #ifdef DEBUG 335 qprintf("globexp2:", patbuf); 336 #endif 337 *rv = globexp1(patbuf, pglob); 338 339 /* move after the comma, to the next string */ 340 pl = pm + 1; 341 } 342 break; 343 344 default: 345 break; 346 } 347 } 348 *rv = 0; 349 return 0; 350 } 351 352 353 354 /* 355 * expand tilde from the passwd file. 356 */ 357 static const Char * 358 globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob) 359 { 360 struct passwd *pwd; 361 const char *h; 362 const Char *p; 363 Char *b; 364 char *d; 365 Char *pend = &patbuf[patsize / sizeof(Char)]; 366 #ifndef NO_GETPW_R 367 struct passwd pwres; 368 char pwbuf[1024]; 369 #endif 370 371 pend--; 372 373 _DIAGASSERT(pattern != NULL); 374 _DIAGASSERT(patbuf != NULL); 375 _DIAGASSERT(pglob != NULL); 376 377 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 378 return pattern; 379 380 /* Copy up to the end of the string or / */ 381 for (p = pattern + 1, d = (char *)(void *)patbuf; 382 d < (char *)(void *)pend && *p && *p != SLASH; 383 *d++ = *p++) 384 continue; 385 386 if (d == (char *)(void *)pend) 387 return NULL; 388 389 *d = EOS; 390 d = (char *)(void *)patbuf; 391 392 if (*d == EOS) { 393 /* 394 * handle a plain ~ or ~/ by expanding $HOME 395 * first and then trying the password file 396 */ 397 if ((h = getenv("HOME")) == NULL) { 398 #ifdef NO_GETPW_R 399 if ((pwd = getpwuid(getuid())) == NULL) 400 #else 401 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf), 402 &pwd) != 0 || pwd == NULL) 403 #endif 404 return pattern; 405 else 406 h = pwd->pw_dir; 407 } 408 } 409 else { 410 /* 411 * Expand a ~user 412 */ 413 #ifdef NO_GETPW_R 414 if ((pwd = getpwnam(d)) == NULL) 415 #else 416 if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 || 417 pwd == NULL) 418 #endif 419 return pattern; 420 else 421 h = pwd->pw_dir; 422 } 423 424 /* Copy the home directory */ 425 for (b = patbuf; b < pend && *h; *b++ = *h++) 426 continue; 427 428 if (b == pend) 429 return NULL; 430 431 /* Append the rest of the pattern */ 432 while (b < pend && (*b++ = *p++) != EOS) 433 continue; 434 435 if (b == pend) 436 return NULL; 437 438 return patbuf; 439 } 440 441 442 /* 443 * The main glob() routine: compiles the pattern (optionally processing 444 * quotes), calls glob1() to do the real pattern matching, and finally 445 * sorts the list (unless unsorted operation is requested). Returns 0 446 * if things went well, nonzero if errors occurred. It is not an error 447 * to find no matches. 448 */ 449 static int 450 glob0(const Char *pattern, glob_t *pglob) 451 { 452 const Char *qpatnext; 453 int c, error; 454 __gl_size_t oldpathc; 455 Char *bufnext, patbuf[MAXPATHLEN+1]; 456 size_t limit = 0; 457 458 _DIAGASSERT(pattern != NULL); 459 _DIAGASSERT(pglob != NULL); 460 461 if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf), 462 pglob)) == NULL) 463 return GLOB_ABEND; 464 oldpathc = pglob->gl_pathc; 465 bufnext = patbuf; 466 467 /* We don't need to check for buffer overflow any more. */ 468 while ((c = *qpatnext++) != EOS) { 469 switch (c) { 470 case LBRACKET: 471 c = *qpatnext; 472 if (c == NOT) 473 ++qpatnext; 474 if (*qpatnext == EOS || 475 g_strchr(qpatnext+1, RBRACKET) == NULL) { 476 *bufnext++ = LBRACKET; 477 if (c == NOT) 478 --qpatnext; 479 break; 480 } 481 *bufnext++ = M_SET; 482 if (c == NOT) 483 *bufnext++ = M_NOT; 484 c = *qpatnext++; 485 do { 486 *bufnext++ = CHAR(c); 487 if (*qpatnext == RANGE && 488 (c = qpatnext[1]) != RBRACKET) { 489 *bufnext++ = M_RNG; 490 *bufnext++ = CHAR(c); 491 qpatnext += 2; 492 } 493 } while ((c = *qpatnext++) != RBRACKET); 494 pglob->gl_flags |= GLOB_MAGCHAR; 495 *bufnext++ = M_END; 496 break; 497 case QUESTION: 498 pglob->gl_flags |= GLOB_MAGCHAR; 499 *bufnext++ = M_ONE; 500 break; 501 case STAR: 502 pglob->gl_flags |= GLOB_MAGCHAR; 503 /* collapse adjacent stars to one, 504 * to avoid exponential behavior 505 */ 506 if (bufnext == patbuf || bufnext[-1] != M_ALL) 507 *bufnext++ = M_ALL; 508 break; 509 default: 510 *bufnext++ = CHAR(c); 511 break; 512 } 513 } 514 *bufnext = EOS; 515 #ifdef DEBUG 516 qprintf("glob0:", patbuf); 517 #endif 518 519 if ((error = glob1(patbuf, pglob, &limit)) != 0) 520 return error; 521 522 if (pglob->gl_pathc == oldpathc) { 523 /* 524 * If there was no match we are going to append the pattern 525 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was 526 * specified and the pattern did not contain any magic 527 * characters GLOB_NOMAGIC is there just for compatibility 528 * with csh. 529 */ 530 if ((pglob->gl_flags & GLOB_NOCHECK) || 531 ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR)) 532 == GLOB_NOMAGIC)) { 533 return globextend(pattern, pglob, &limit); 534 } else { 535 return GLOB_NOMATCH; 536 } 537 } else if (!(pglob->gl_flags & GLOB_NOSORT)) { 538 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 539 (size_t)pglob->gl_pathc - oldpathc, sizeof(char *), 540 compare); 541 } 542 543 return 0; 544 } 545 546 static int 547 compare(const void *p, const void *q) 548 { 549 550 _DIAGASSERT(p != NULL); 551 _DIAGASSERT(q != NULL); 552 553 return strcoll(*(const char * const *)p, *(const char * const *)q); 554 } 555 556 static int 557 glob1(Char *pattern, glob_t *pglob, size_t *limit) 558 { 559 Char pathbuf[MAXPATHLEN+1]; 560 561 _DIAGASSERT(pattern != NULL); 562 _DIAGASSERT(pglob != NULL); 563 564 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 565 if (*pattern == EOS) 566 return 0; 567 /* 568 * we save one character so that we can use ptr >= limit, 569 * in the general case when we are appending non nul chars only. 570 */ 571 return glob2(pathbuf, pathbuf, 572 pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern, 573 pglob, limit); 574 } 575 576 /* 577 * The functions glob2 and glob3 are mutually recursive; there is one level 578 * of recursion for each segment in the pattern that contains one or more 579 * meta characters. 580 */ 581 static int 582 glob2(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, glob_t *pglob, 583 size_t *limit) 584 { 585 __gl_stat_t sb; 586 Char *p, *q; 587 int anymeta; 588 Char *pend; 589 ptrdiff_t diff; 590 591 _DIAGASSERT(pathbuf != NULL); 592 _DIAGASSERT(pathend != NULL); 593 _DIAGASSERT(pattern != NULL); 594 _DIAGASSERT(pglob != NULL); 595 596 /* 597 * Loop over pattern segments until end of pattern or until 598 * segment with meta character found. 599 */ 600 for (anymeta = 0;;) { 601 if (*pattern == EOS) { /* End of pattern? */ 602 *pathend = EOS; 603 if (g_lstat(pathbuf, &sb, pglob)) 604 return 0; 605 606 if (((pglob->gl_flags & GLOB_MARK) && 607 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 608 (S_ISLNK(sb.st_mode) && 609 (g_stat(pathbuf, &sb, pglob) == 0) && 610 S_ISDIR(sb.st_mode)))) { 611 if (pathend >= pathlim) 612 return GLOB_ABORTED; 613 *pathend++ = SEP; 614 *pathend = EOS; 615 } 616 ++pglob->gl_matchc; 617 return globextend(pathbuf, pglob, limit); 618 } 619 620 /* Find end of next segment, copy tentatively to pathend. */ 621 q = pathend; 622 p = pattern; 623 while (*p != EOS && *p != SEP) { 624 if (ismeta(*p)) 625 anymeta = 1; 626 if (q >= pathlim) 627 return GLOB_ABORTED; 628 *q++ = *p++; 629 } 630 631 /* 632 * No expansion, or path ends in slash-dot shash-dot-dot, 633 * do next segment. 634 */ 635 if (pglob->gl_flags & GLOB_PERIOD) { 636 for (pend = pathend; pend > pathbuf && pend[-1] == '/'; 637 pend--) 638 continue; 639 diff = pend - pathbuf; 640 } else { 641 /* XXX: GCC */ 642 diff = 0; 643 pend = pathend; 644 } 645 646 if ((!anymeta) || 647 ((pglob->gl_flags & GLOB_PERIOD) && 648 (diff >= 1 && pend[-1] == DOT) && 649 (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) && 650 (diff < 3 || pend[-3] == SLASH))) { 651 pathend = q; 652 pattern = p; 653 while (*pattern == SEP) { 654 if (pathend >= pathlim) 655 return GLOB_ABORTED; 656 *pathend++ = *pattern++; 657 } 658 } else /* Need expansion, recurse. */ 659 return glob3(pathbuf, pathend, pathlim, pattern, p, 660 pglob, limit); 661 } 662 /* NOTREACHED */ 663 } 664 665 static int 666 glob3(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, 667 Char *restpattern, glob_t *pglob, size_t *limit) 668 { 669 struct dirent *dp; 670 DIR *dirp; 671 int error; 672 char buf[MAXPATHLEN]; 673 674 /* 675 * The readdirfunc declaration can't be prototyped, because it is 676 * assigned, below, to two functions which are prototyped in glob.h 677 * and dirent.h as taking pointers to differently typed opaque 678 * structures. 679 */ 680 struct dirent *(*readdirfunc)(void *); 681 682 _DIAGASSERT(pathbuf != NULL); 683 _DIAGASSERT(pathend != NULL); 684 _DIAGASSERT(pattern != NULL); 685 _DIAGASSERT(restpattern != NULL); 686 _DIAGASSERT(pglob != NULL); 687 688 *pathend = EOS; 689 errno = 0; 690 691 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 692 if (pglob->gl_errfunc) { 693 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 694 return GLOB_ABORTED; 695 if (pglob->gl_errfunc(buf, errno) || 696 pglob->gl_flags & GLOB_ERR) 697 return GLOB_ABORTED; 698 } 699 /* 700 * Posix/XOpen: glob should return when it encounters a 701 * directory that it cannot open or read 702 * XXX: Should we ignore ENOTDIR and ENOENT though? 703 * I think that Posix had in mind EPERM... 704 */ 705 if (pglob->gl_flags & GLOB_ERR) 706 return GLOB_ABORTED; 707 708 return 0; 709 } 710 711 error = 0; 712 713 /* Search directory for matching names. */ 714 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 715 readdirfunc = pglob->gl_readdir; 716 else 717 readdirfunc = (struct dirent *(*)__P((void *))) readdir; 718 while ((dp = (*readdirfunc)(dirp)) != NULL) { 719 u_char *sc; 720 Char *dc; 721 722 /* 723 * Initial DOT must be matched literally, unless we have 724 * GLOB_PERIOD set. 725 */ 726 if ((pglob->gl_flags & GLOB_PERIOD) == 0) 727 if (dp->d_name[0] == DOT && *pattern != DOT) 728 continue; 729 /* 730 * The resulting string contains EOS, so we can 731 * use the pathlim character, if it is the nul 732 */ 733 for (sc = (u_char *) dp->d_name, dc = pathend; 734 dc <= pathlim && (*dc++ = *sc++) != EOS;) 735 continue; 736 737 /* 738 * Have we filled the buffer without seeing EOS? 739 */ 740 if (dc > pathlim && *pathlim != EOS) { 741 /* 742 * Abort when requested by caller, otherwise 743 * reset pathend back to last SEP and continue 744 * with next dir entry. 745 */ 746 if (pglob->gl_flags & GLOB_ERR) { 747 error = GLOB_ABORTED; 748 break; 749 } 750 else { 751 *pathend = EOS; 752 continue; 753 } 754 } 755 756 if (!match(pathend, pattern, restpattern)) { 757 *pathend = EOS; 758 continue; 759 } 760 error = glob2(pathbuf, --dc, pathlim, restpattern, pglob, limit); 761 if (error) 762 break; 763 } 764 765 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 766 (*pglob->gl_closedir)(dirp); 767 else 768 closedir(dirp); 769 770 /* 771 * Again Posix X/Open issue with regards to error handling. 772 */ 773 if ((error || errno) && (pglob->gl_flags & GLOB_ERR)) 774 return GLOB_ABORTED; 775 776 return error; 777 } 778 779 780 /* 781 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 782 * add the new item, and update gl_pathc. 783 * 784 * This assumes the BSD realloc, which only copies the block when its size 785 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 786 * behavior. 787 * 788 * Return 0 if new item added, error code if memory couldn't be allocated. 789 * 790 * Invariant of the glob_t structure: 791 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 792 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 793 */ 794 static int 795 globextend(const Char *path, glob_t *pglob, size_t *limit) 796 { 797 char **pathv; 798 size_t i, newsize, len; 799 char *copy; 800 const Char *p; 801 802 _DIAGASSERT(path != NULL); 803 _DIAGASSERT(pglob != NULL); 804 805 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 806 pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) : 807 malloc(newsize); 808 if (pathv == NULL) 809 return GLOB_NOSPACE; 810 811 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 812 /* first time around -- clear initial gl_offs items */ 813 pathv += pglob->gl_offs; 814 for (i = pglob->gl_offs + 1; --i > 0; ) 815 *--pathv = NULL; 816 } 817 pglob->gl_pathv = pathv; 818 819 for (p = path; *p++;) 820 continue; 821 len = (size_t)(p - path); 822 *limit += len; 823 if ((copy = malloc(len)) != NULL) { 824 if (g_Ctoc(path, copy, len)) { 825 free(copy); 826 return GLOB_ABORTED; 827 } 828 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 829 } 830 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 831 832 if ((pglob->gl_flags & GLOB_LIMIT) && (newsize + *limit) >= ARG_MAX) { 833 errno = 0; 834 return GLOB_NOSPACE; 835 } 836 837 return copy == NULL ? GLOB_NOSPACE : 0; 838 } 839 840 841 /* 842 * pattern matching function for filenames. Each occurrence of the * 843 * pattern causes a recursion level. 844 */ 845 static int 846 match(Char *name, Char *pat, Char *patend) 847 { 848 int ok, negate_range; 849 Char c, k; 850 851 _DIAGASSERT(name != NULL); 852 _DIAGASSERT(pat != NULL); 853 _DIAGASSERT(patend != NULL); 854 855 while (pat < patend) { 856 c = *pat++; 857 switch (c & M_MASK) { 858 case M_ALL: 859 if (pat == patend) 860 return 1; 861 do 862 if (match(name, pat, patend)) 863 return 1; 864 while (*name++ != EOS); 865 return 0; 866 case M_ONE: 867 if (*name++ == EOS) 868 return 0; 869 break; 870 case M_SET: 871 ok = 0; 872 if ((k = *name++) == EOS) 873 return 0; 874 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 875 ++pat; 876 while (((c = *pat++) & M_MASK) != M_END) 877 if ((*pat & M_MASK) == M_RNG) { 878 if (c <= k && k <= pat[1]) 879 ok = 1; 880 pat += 2; 881 } else if (c == k) 882 ok = 1; 883 if (ok == negate_range) 884 return 0; 885 break; 886 default: 887 if (*name++ != c) 888 return 0; 889 break; 890 } 891 } 892 return *name == EOS; 893 } 894 895 /* Free allocated data belonging to a glob_t structure. */ 896 void 897 globfree(glob_t *pglob) 898 { 899 size_t i; 900 char **pp; 901 902 _DIAGASSERT(pglob != NULL); 903 904 if (pglob->gl_pathv != NULL) { 905 pp = pglob->gl_pathv + pglob->gl_offs; 906 for (i = pglob->gl_pathc; i--; ++pp) 907 if (*pp) 908 free(*pp); 909 free(pglob->gl_pathv); 910 pglob->gl_pathv = NULL; 911 pglob->gl_pathc = 0; 912 } 913 } 914 915 static DIR * 916 g_opendir(Char *str, glob_t *pglob) 917 { 918 char buf[MAXPATHLEN]; 919 920 _DIAGASSERT(str != NULL); 921 _DIAGASSERT(pglob != NULL); 922 923 if (!*str) 924 (void)strlcpy(buf, ".", sizeof(buf)); 925 else { 926 if (g_Ctoc(str, buf, sizeof(buf))) 927 return NULL; 928 } 929 930 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 931 return (*pglob->gl_opendir)(buf); 932 933 return opendir(buf); 934 } 935 936 static int 937 g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 938 { 939 char buf[MAXPATHLEN]; 940 941 _DIAGASSERT(fn != NULL); 942 _DIAGASSERT(sb != NULL); 943 _DIAGASSERT(pglob != NULL); 944 945 if (g_Ctoc(fn, buf, sizeof(buf))) 946 return -1; 947 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 948 return (*pglob->gl_lstat)(buf, sb); 949 return lstat(buf, sb); 950 } 951 952 static int 953 g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 954 { 955 char buf[MAXPATHLEN]; 956 957 _DIAGASSERT(fn != NULL); 958 _DIAGASSERT(sb != NULL); 959 _DIAGASSERT(pglob != NULL); 960 961 if (g_Ctoc(fn, buf, sizeof(buf))) 962 return -1; 963 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 964 return (*pglob->gl_stat)(buf, sb); 965 return stat(buf, sb); 966 } 967 968 static Char * 969 g_strchr(const Char *str, int ch) 970 { 971 972 _DIAGASSERT(str != NULL); 973 974 do { 975 if (*str == ch) 976 return __UNCONST(str); 977 } while (*str++); 978 return NULL; 979 } 980 981 static int 982 g_Ctoc(const Char *str, char *buf, size_t len) 983 { 984 char *dc; 985 986 _DIAGASSERT(str != NULL); 987 _DIAGASSERT(buf != NULL); 988 989 if (len == 0) 990 return 1; 991 992 for (dc = buf; len && (*dc++ = *str++) != EOS; len--) 993 continue; 994 995 return len == 0; 996 } 997 998 #ifdef DEBUG 999 static void 1000 qprintf(const char *str, Char *s) 1001 { 1002 Char *p; 1003 1004 _DIAGASSERT(str != NULL); 1005 _DIAGASSERT(s != NULL); 1006 1007 (void)printf("%s:\n", str); 1008 for (p = s; *p; p++) 1009 (void)printf("%c", CHAR(*p)); 1010 (void)printf("\n"); 1011 for (p = s; *p; p++) 1012 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 1013 (void)printf("\n"); 1014 for (p = s; *p; p++) 1015 (void)printf("%c", ismeta(*p) ? '_' : ' '); 1016 (void)printf("\n"); 1017 } 1018 #endif 1019
Indexes created Tue Sep 30 20:09:53 GMT 2025