1 /* $NetBSD: glob.c,v 1.24 2009/04/08 16:28:50 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 1.24 2009/04/08 16:28:50 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 *); 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 *); 167 static int globexp2(const Char *, const Char *, glob_t *, int *); 168 static int match(Char *, Char *, Char *); 169 #ifdef DEBUG 170 static void qprintf(const char *, Char *); 171 #endif 172 173 int 174 glob(const char *pattern, int flags, int (*errfunc)(const char *, int), 175 glob_t *pglob) 176 { 177 const u_char *patnext; 178 int c; 179 Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 180 181 _DIAGASSERT(pattern != NULL); 182 183 patnext = (const u_char *) pattern; 184 if (!(flags & GLOB_APPEND)) { 185 pglob->gl_pathc = 0; 186 pglob->gl_pathv = NULL; 187 if (!(flags & GLOB_DOOFFS)) 188 pglob->gl_offs = 0; 189 } 190 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 191 pglob->gl_errfunc = errfunc; 192 pglob->gl_matchc = 0; 193 194 bufnext = patbuf; 195 bufend = bufnext + MAXPATHLEN; 196 if (flags & GLOB_NOESCAPE) { 197 while (bufnext < bufend && (c = *patnext++) != EOS) 198 *bufnext++ = c; 199 } else { 200 /* Protect the quoted characters. */ 201 while (bufnext < bufend && (c = *patnext++) != EOS) 202 if (c == QUOTE) { 203 if ((c = *patnext++) == EOS) { 204 c = QUOTE; 205 --patnext; 206 } 207 *bufnext++ = c | M_PROTECT; 208 } 209 else 210 *bufnext++ = c; 211 } 212 *bufnext = EOS; 213 214 if (flags & GLOB_BRACE) 215 return globexp1(patbuf, pglob); 216 else 217 return glob0(patbuf, pglob); 218 } 219 220 /* 221 * Expand recursively a glob {} pattern. When there is no more expansion 222 * invoke the standard globbing routine to glob the rest of the magic 223 * characters 224 */ 225 static int 226 globexp1(const Char *pattern, glob_t *pglob) 227 { 228 const Char* ptr = pattern; 229 int rv; 230 231 _DIAGASSERT(pattern != NULL); 232 _DIAGASSERT(pglob != NULL); 233 234 /* Protect a single {}, for find(1), like csh */ 235 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 236 return glob0(pattern, pglob); 237 238 while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL) 239 if (!globexp2(ptr, pattern, pglob, &rv)) 240 return rv; 241 242 return glob0(pattern, pglob); 243 } 244 245 246 /* 247 * Recursive brace globbing helper. Tries to expand a single brace. 248 * If it succeeds then it invokes globexp1 with the new pattern. 249 * If it fails then it tries to glob the rest of the pattern and returns. 250 */ 251 static int 252 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv) 253 { 254 int i; 255 Char *lm, *ls; 256 const Char *pe, *pm, *pl; 257 Char patbuf[MAXPATHLEN + 1]; 258 259 _DIAGASSERT(ptr != NULL); 260 _DIAGASSERT(pattern != NULL); 261 _DIAGASSERT(pglob != NULL); 262 _DIAGASSERT(rv != NULL); 263 264 /* copy part up to the brace */ 265 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 266 continue; 267 ls = lm; 268 269 /* Find the balanced brace */ 270 for (i = 0, pe = ++ptr; *pe; pe++) 271 if (*pe == LBRACKET) { 272 /* Ignore everything between [] */ 273 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 274 continue; 275 if (*pe == EOS) { 276 /* 277 * We could not find a matching RBRACKET. 278 * Ignore and just look for RBRACE 279 */ 280 pe = pm; 281 } 282 } 283 else if (*pe == LBRACE) 284 i++; 285 else if (*pe == RBRACE) { 286 if (i == 0) 287 break; 288 i--; 289 } 290 291 /* Non matching braces; just glob the pattern */ 292 if (i != 0 || *pe == EOS) { 293 /* 294 * we use `pattern', not `patbuf' here so that that 295 * unbalanced braces are passed to the match 296 */ 297 *rv = glob0(pattern, pglob); 298 return 0; 299 } 300 301 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 302 switch (*pm) { 303 case LBRACKET: 304 /* Ignore everything between [] */ 305 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 306 continue; 307 if (*pm == EOS) { 308 /* 309 * We could not find a matching RBRACKET. 310 * Ignore and just look for RBRACE 311 */ 312 pm = pl; 313 } 314 break; 315 316 case LBRACE: 317 i++; 318 break; 319 320 case RBRACE: 321 if (i) { 322 i--; 323 break; 324 } 325 /* FALLTHROUGH */ 326 case COMMA: 327 if (i && *pm == COMMA) 328 break; 329 else { 330 /* Append the current string */ 331 for (lm = ls; (pl < pm); *lm++ = *pl++) 332 continue; 333 /* 334 * Append the rest of the pattern after the 335 * closing brace 336 */ 337 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 338 continue; 339 340 /* Expand the current pattern */ 341 #ifdef DEBUG 342 qprintf("globexp2:", patbuf); 343 #endif 344 *rv = globexp1(patbuf, pglob); 345 346 /* move after the comma, to the next string */ 347 pl = pm + 1; 348 } 349 break; 350 351 default: 352 break; 353 } 354 } 355 *rv = 0; 356 return 0; 357 } 358 359 360 361 /* 362 * expand tilde from the passwd file. 363 */ 364 static const Char * 365 globtilde(const Char *pattern, Char *patbuf, size_t patsize, glob_t *pglob) 366 { 367 struct passwd *pwd; 368 const char *h; 369 const Char *p; 370 Char *b; 371 char *d; 372 Char *pend = &patbuf[patsize / sizeof(Char)]; 373 #ifndef NO_GETPW_R 374 struct passwd pwres; 375 char pwbuf[1024]; 376 #endif 377 378 pend--; 379 380 _DIAGASSERT(pattern != NULL); 381 _DIAGASSERT(patbuf != NULL); 382 _DIAGASSERT(pglob != NULL); 383 384 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 385 return pattern; 386 387 /* Copy up to the end of the string or / */ 388 for (p = pattern + 1, d = (char *)(void *)patbuf; 389 d < (char *)(void *)pend && *p && *p != SLASH; 390 *d++ = *p++) 391 continue; 392 393 if (d == (char *)(void *)pend) 394 return NULL; 395 396 *d = EOS; 397 d = (char *)(void *)patbuf; 398 399 if (*d == EOS) { 400 /* 401 * handle a plain ~ or ~/ by expanding $HOME 402 * first and then trying the password file 403 */ 404 if ((h = getenv("HOME")) == NULL) { 405 #ifdef NO_GETPW_R 406 if ((pwd = getpwuid(getuid())) == NULL) 407 #else 408 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf), 409 &pwd) != 0 || pwd == NULL) 410 #endif 411 return pattern; 412 else 413 h = pwd->pw_dir; 414 } 415 } 416 else { 417 /* 418 * Expand a ~user 419 */ 420 #ifdef NO_GETPW_R 421 if ((pwd = getpwnam(d)) == NULL) 422 #else 423 if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 || 424 pwd == NULL) 425 #endif 426 return pattern; 427 else 428 h = pwd->pw_dir; 429 } 430 431 /* Copy the home directory */ 432 for (b = patbuf; b < pend && *h; *b++ = *h++) 433 continue; 434 435 if (b == pend) 436 return NULL; 437 438 /* Append the rest of the pattern */ 439 while (b < pend && (*b++ = *p++) != EOS) 440 continue; 441 442 if (b == pend) 443 return NULL; 444 445 return patbuf; 446 } 447 448 449 /* 450 * The main glob() routine: compiles the pattern (optionally processing 451 * quotes), calls glob1() to do the real pattern matching, and finally 452 * sorts the list (unless unsorted operation is requested). Returns 0 453 * if things went well, nonzero if errors occurred. It is not an error 454 * to find no matches. 455 */ 456 static int 457 glob0(const Char *pattern, glob_t *pglob) 458 { 459 const Char *qpatnext; 460 int c, error; 461 __gl_size_t oldpathc; 462 Char *bufnext, patbuf[MAXPATHLEN+1]; 463 size_t limit = 0; 464 465 _DIAGASSERT(pattern != NULL); 466 _DIAGASSERT(pglob != NULL); 467 468 if ((qpatnext = globtilde(pattern, patbuf, sizeof(patbuf), 469 pglob)) == NULL) 470 return GLOB_ABEND; 471 oldpathc = pglob->gl_pathc; 472 bufnext = patbuf; 473 474 /* We don't need to check for buffer overflow any more. */ 475 while ((c = *qpatnext++) != EOS) { 476 switch (c) { 477 case LBRACKET: 478 c = *qpatnext; 479 if (c == NOT) 480 ++qpatnext; 481 if (*qpatnext == EOS || 482 g_strchr(qpatnext+1, RBRACKET) == NULL) { 483 *bufnext++ = LBRACKET; 484 if (c == NOT) 485 --qpatnext; 486 break; 487 } 488 *bufnext++ = M_SET; 489 if (c == NOT) 490 *bufnext++ = M_NOT; 491 c = *qpatnext++; 492 do { 493 *bufnext++ = CHAR(c); 494 if (*qpatnext == RANGE && 495 (c = qpatnext[1]) != RBRACKET) { 496 *bufnext++ = M_RNG; 497 *bufnext++ = CHAR(c); 498 qpatnext += 2; 499 } 500 } while ((c = *qpatnext++) != RBRACKET); 501 pglob->gl_flags |= GLOB_MAGCHAR; 502 *bufnext++ = M_END; 503 break; 504 case QUESTION: 505 pglob->gl_flags |= GLOB_MAGCHAR; 506 *bufnext++ = M_ONE; 507 break; 508 case STAR: 509 pglob->gl_flags |= GLOB_MAGCHAR; 510 /* collapse adjacent stars to one, 511 * to avoid exponential behavior 512 */ 513 if (bufnext == patbuf || bufnext[-1] != M_ALL) 514 *bufnext++ = M_ALL; 515 break; 516 default: 517 *bufnext++ = CHAR(c); 518 break; 519 } 520 } 521 *bufnext = EOS; 522 #ifdef DEBUG 523 qprintf("glob0:", patbuf); 524 #endif 525 526 if ((error = glob1(patbuf, pglob, &limit)) != 0) 527 return error; 528 529 if (pglob->gl_pathc == oldpathc) { 530 /* 531 * If there was no match we are going to append the pattern 532 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was 533 * specified and the pattern did not contain any magic 534 * characters GLOB_NOMAGIC is there just for compatibility 535 * with csh. 536 */ 537 if ((pglob->gl_flags & GLOB_NOCHECK) || 538 ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR)) 539 == GLOB_NOMAGIC)) { 540 return globextend(pattern, pglob, &limit); 541 } else { 542 return GLOB_NOMATCH; 543 } 544 } else if (!(pglob->gl_flags & GLOB_NOSORT)) { 545 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 546 (size_t)pglob->gl_pathc - oldpathc, sizeof(char *), 547 compare); 548 } 549 550 return 0; 551 } 552 553 static int 554 compare(const void *p, const void *q) 555 { 556 557 _DIAGASSERT(p != NULL); 558 _DIAGASSERT(q != NULL); 559 560 return strcoll(*(const char * const *)p, *(const char * const *)q); 561 } 562 563 static int 564 glob1(Char *pattern, glob_t *pglob, size_t *limit) 565 { 566 Char pathbuf[MAXPATHLEN+1]; 567 568 _DIAGASSERT(pattern != NULL); 569 _DIAGASSERT(pglob != NULL); 570 571 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 572 if (*pattern == EOS) 573 return 0; 574 /* 575 * we save one character so that we can use ptr >= limit, 576 * in the general case when we are appending non nul chars only. 577 */ 578 return glob2(pathbuf, pathbuf, 579 pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern, 580 pglob, limit); 581 } 582 583 /* 584 * The functions glob2 and glob3 are mutually recursive; there is one level 585 * of recursion for each segment in the pattern that contains one or more 586 * meta characters. 587 */ 588 static int 589 glob2(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, glob_t *pglob, 590 size_t *limit) 591 { 592 __gl_stat_t sb; 593 Char *p, *q; 594 int anymeta; 595 Char *pend; 596 ptrdiff_t diff; 597 598 _DIAGASSERT(pathbuf != NULL); 599 _DIAGASSERT(pathend != NULL); 600 _DIAGASSERT(pattern != NULL); 601 _DIAGASSERT(pglob != NULL); 602 603 /* 604 * Loop over pattern segments until end of pattern or until 605 * segment with meta character found. 606 */ 607 for (anymeta = 0;;) { 608 if (*pattern == EOS) { /* End of pattern? */ 609 *pathend = EOS; 610 if (g_lstat(pathbuf, &sb, pglob)) 611 return 0; 612 613 if (((pglob->gl_flags & GLOB_MARK) && 614 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 615 (S_ISLNK(sb.st_mode) && 616 (g_stat(pathbuf, &sb, pglob) == 0) && 617 S_ISDIR(sb.st_mode)))) { 618 if (pathend >= pathlim) 619 return GLOB_ABORTED; 620 *pathend++ = SEP; 621 *pathend = EOS; 622 } 623 ++pglob->gl_matchc; 624 return globextend(pathbuf, pglob, limit); 625 } 626 627 /* Find end of next segment, copy tentatively to pathend. */ 628 q = pathend; 629 p = pattern; 630 while (*p != EOS && *p != SEP) { 631 if (ismeta(*p)) 632 anymeta = 1; 633 if (q >= pathlim) 634 return GLOB_ABORTED; 635 *q++ = *p++; 636 } 637 638 /* 639 * No expansion, or path ends in slash-dot shash-dot-dot, 640 * do next segment. 641 */ 642 if (pglob->gl_flags & GLOB_PERIOD) { 643 for (pend = pathend; pend > pathbuf && pend[-1] == '/'; 644 pend--) 645 continue; 646 diff = pend - pathbuf; 647 } else { 648 /* XXX: GCC */ 649 diff = 0; 650 pend = pathend; 651 } 652 653 if ((!anymeta) || 654 ((pglob->gl_flags & GLOB_PERIOD) && 655 (diff >= 1 && pend[-1] == DOT) && 656 (diff >= 2 && (pend[-2] == SLASH || pend[-2] == DOT)) && 657 (diff < 3 || pend[-3] == SLASH))) { 658 pathend = q; 659 pattern = p; 660 while (*pattern == SEP) { 661 if (pathend >= pathlim) 662 return GLOB_ABORTED; 663 *pathend++ = *pattern++; 664 } 665 } else /* Need expansion, recurse. */ 666 return glob3(pathbuf, pathend, pathlim, pattern, p, 667 pglob, limit); 668 } 669 /* NOTREACHED */ 670 } 671 672 static int 673 glob3(Char *pathbuf, Char *pathend, Char *pathlim, Char *pattern, 674 Char *restpattern, glob_t *pglob, size_t *limit) 675 { 676 struct dirent *dp; 677 DIR *dirp; 678 int error; 679 char buf[MAXPATHLEN]; 680 681 /* 682 * The readdirfunc declaration can't be prototyped, because it is 683 * assigned, below, to two functions which are prototyped in glob.h 684 * and dirent.h as taking pointers to differently typed opaque 685 * structures. 686 */ 687 struct dirent *(*readdirfunc)(void *); 688 689 _DIAGASSERT(pathbuf != NULL); 690 _DIAGASSERT(pathend != NULL); 691 _DIAGASSERT(pattern != NULL); 692 _DIAGASSERT(restpattern != NULL); 693 _DIAGASSERT(pglob != NULL); 694 695 *pathend = EOS; 696 errno = 0; 697 698 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 699 if (pglob->gl_errfunc) { 700 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 701 return GLOB_ABORTED; 702 if (pglob->gl_errfunc(buf, errno) || 703 pglob->gl_flags & GLOB_ERR) 704 return GLOB_ABORTED; 705 } 706 /* 707 * Posix/XOpen: glob should return when it encounters a 708 * directory that it cannot open or read 709 * XXX: Should we ignore ENOTDIR and ENOENT though? 710 * I think that Posix had in mind EPERM... 711 */ 712 if (pglob->gl_flags & GLOB_ERR) 713 return GLOB_ABORTED; 714 715 return 0; 716 } 717 718 error = 0; 719 720 /* Search directory for matching names. */ 721 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 722 readdirfunc = pglob->gl_readdir; 723 else 724 readdirfunc = (struct dirent *(*)__P((void *))) readdir; 725 while ((dp = (*readdirfunc)(dirp)) != NULL) { 726 u_char *sc; 727 Char *dc; 728 729 /* 730 * Initial DOT must be matched literally, unless we have 731 * GLOB_PERIOD set. 732 */ 733 if ((pglob->gl_flags & GLOB_PERIOD) == 0) 734 if (dp->d_name[0] == DOT && *pattern != DOT) 735 continue; 736 /* 737 * If GLOB_NO_DOTDIRS is set, . and .. vanish. 738 */ 739 if ((pglob->gl_flags & GLOB_NO_DOTDIRS) && 740 (dp->d_name[0] == DOT) && 741 ((dp->d_name[1] == EOS) || 742 ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS)))) 743 continue; 744 /* 745 * The resulting string contains EOS, so we can 746 * use the pathlim character, if it is the nul 747 */ 748 for (sc = (u_char *) dp->d_name, dc = pathend; 749 dc <= pathlim && (*dc++ = *sc++) != EOS;) 750 continue; 751 752 /* 753 * Have we filled the buffer without seeing EOS? 754 */ 755 if (dc > pathlim && *pathlim != EOS) { 756 /* 757 * Abort when requested by caller, otherwise 758 * reset pathend back to last SEP and continue 759 * with next dir entry. 760 */ 761 if (pglob->gl_flags & GLOB_ERR) { 762 error = GLOB_ABORTED; 763 break; 764 } 765 else { 766 *pathend = EOS; 767 continue; 768 } 769 } 770 771 if (!match(pathend, pattern, restpattern)) { 772 *pathend = EOS; 773 continue; 774 } 775 error = glob2(pathbuf, --dc, pathlim, restpattern, pglob, limit); 776 if (error) 777 break; 778 } 779 780 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 781 (*pglob->gl_closedir)(dirp); 782 else 783 closedir(dirp); 784 785 /* 786 * Again Posix X/Open issue with regards to error handling. 787 */ 788 if ((error || errno) && (pglob->gl_flags & GLOB_ERR)) 789 return GLOB_ABORTED; 790 791 return error; 792 } 793 794 795 /* 796 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 797 * add the new item, and update gl_pathc. 798 * 799 * This assumes the BSD realloc, which only copies the block when its size 800 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 801 * behavior. 802 * 803 * Return 0 if new item added, error code if memory couldn't be allocated. 804 * 805 * Invariant of the glob_t structure: 806 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 807 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 808 */ 809 static int 810 globextend(const Char *path, glob_t *pglob, size_t *limit) 811 { 812 char **pathv; 813 size_t i, newsize, len; 814 char *copy; 815 const Char *p; 816 817 _DIAGASSERT(path != NULL); 818 _DIAGASSERT(pglob != NULL); 819 820 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 821 pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) : 822 malloc(newsize); 823 if (pathv == NULL) 824 return GLOB_NOSPACE; 825 826 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 827 /* first time around -- clear initial gl_offs items */ 828 pathv += pglob->gl_offs; 829 for (i = pglob->gl_offs + 1; --i > 0; ) 830 *--pathv = NULL; 831 } 832 pglob->gl_pathv = pathv; 833 834 for (p = path; *p++;) 835 continue; 836 len = (size_t)(p - path); 837 *limit += len; 838 if ((copy = malloc(len)) != NULL) { 839 if (g_Ctoc(path, copy, len)) { 840 free(copy); 841 return GLOB_ABORTED; 842 } 843 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 844 } 845 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 846 847 if ((pglob->gl_flags & GLOB_LIMIT) && (newsize + *limit) >= ARG_MAX) { 848 errno = 0; 849 return GLOB_NOSPACE; 850 } 851 852 return copy == NULL ? GLOB_NOSPACE : 0; 853 } 854 855 856 /* 857 * pattern matching function for filenames. Each occurrence of the * 858 * pattern causes a recursion level. 859 */ 860 static int 861 match(Char *name, Char *pat, Char *patend) 862 { 863 int ok, negate_range; 864 Char c, k; 865 866 _DIAGASSERT(name != NULL); 867 _DIAGASSERT(pat != NULL); 868 _DIAGASSERT(patend != NULL); 869 870 while (pat < patend) { 871 c = *pat++; 872 switch (c & M_MASK) { 873 case M_ALL: 874 if (pat == patend) 875 return 1; 876 do 877 if (match(name, pat, patend)) 878 return 1; 879 while (*name++ != EOS); 880 return 0; 881 case M_ONE: 882 if (*name++ == EOS) 883 return 0; 884 break; 885 case M_SET: 886 ok = 0; 887 if ((k = *name++) == EOS) 888 return 0; 889 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 890 ++pat; 891 while (((c = *pat++) & M_MASK) != M_END) 892 if ((*pat & M_MASK) == M_RNG) { 893 if (c <= k && k <= pat[1]) 894 ok = 1; 895 pat += 2; 896 } else if (c == k) 897 ok = 1; 898 if (ok == negate_range) 899 return 0; 900 break; 901 default: 902 if (*name++ != c) 903 return 0; 904 break; 905 } 906 } 907 return *name == EOS; 908 } 909 910 /* Free allocated data belonging to a glob_t structure. */ 911 void 912 globfree(glob_t *pglob) 913 { 914 size_t i; 915 char **pp; 916 917 _DIAGASSERT(pglob != NULL); 918 919 if (pglob->gl_pathv != NULL) { 920 pp = pglob->gl_pathv + pglob->gl_offs; 921 for (i = pglob->gl_pathc; i--; ++pp) 922 if (*pp) 923 free(*pp); 924 free(pglob->gl_pathv); 925 pglob->gl_pathv = NULL; 926 pglob->gl_pathc = 0; 927 } 928 } 929 930 #ifndef __LIBC12_SOURCE__ 931 int 932 glob_pattern_p(const char *pattern, int quote) 933 { 934 int range = 0; 935 936 for (; *pattern; pattern++) 937 switch (*pattern) { 938 case QUESTION: 939 case STAR: 940 return 1; 941 942 case QUOTE: 943 if (quote && pattern[1] != '\0') 944 ++pattern; 945 break; 946 947 case LBRACKET: 948 range = 1; 949 break; 950 951 case RBRACKET: 952 if (range) 953 return 1; 954 break; 955 default: 956 break; 957 } 958 959 return 0; 960 } 961 #endif 962 963 static DIR * 964 g_opendir(Char *str, glob_t *pglob) 965 { 966 char buf[MAXPATHLEN]; 967 968 _DIAGASSERT(str != NULL); 969 _DIAGASSERT(pglob != NULL); 970 971 if (!*str) 972 (void)strlcpy(buf, ".", sizeof(buf)); 973 else { 974 if (g_Ctoc(str, buf, sizeof(buf))) 975 return NULL; 976 } 977 978 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 979 return (*pglob->gl_opendir)(buf); 980 981 return opendir(buf); 982 } 983 984 static int 985 g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 986 { 987 char buf[MAXPATHLEN]; 988 989 _DIAGASSERT(fn != NULL); 990 _DIAGASSERT(sb != NULL); 991 _DIAGASSERT(pglob != NULL); 992 993 if (g_Ctoc(fn, buf, sizeof(buf))) 994 return -1; 995 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 996 return (*pglob->gl_lstat)(buf, sb); 997 return lstat(buf, sb); 998 } 999 1000 static int 1001 g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 1002 { 1003 char buf[MAXPATHLEN]; 1004 1005 _DIAGASSERT(fn != NULL); 1006 _DIAGASSERT(sb != NULL); 1007 _DIAGASSERT(pglob != NULL); 1008 1009 if (g_Ctoc(fn, buf, sizeof(buf))) 1010 return -1; 1011 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1012 return (*pglob->gl_stat)(buf, sb); 1013 return stat(buf, sb); 1014 } 1015 1016 static Char * 1017 g_strchr(const Char *str, int ch) 1018 { 1019 1020 _DIAGASSERT(str != NULL); 1021 1022 do { 1023 if (*str == ch) 1024 return __UNCONST(str); 1025 } while (*str++); 1026 return NULL; 1027 } 1028 1029 static int 1030 g_Ctoc(const Char *str, char *buf, size_t len) 1031 { 1032 char *dc; 1033 1034 _DIAGASSERT(str != NULL); 1035 _DIAGASSERT(buf != NULL); 1036 1037 if (len == 0) 1038 return 1; 1039 1040 for (dc = buf; len && (*dc++ = *str++) != EOS; len--) 1041 continue; 1042 1043 return len == 0; 1044 } 1045 1046 #ifdef DEBUG 1047 static void 1048 qprintf(const char *str, Char *s) 1049 { 1050 Char *p; 1051 1052 _DIAGASSERT(str != NULL); 1053 _DIAGASSERT(s != NULL); 1054 1055 (void)printf("%s:\n", str); 1056 for (p = s; *p; p++) 1057 (void)printf("%c", CHAR(*p)); 1058 (void)printf("\n"); 1059 for (p = s; *p; p++) 1060 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 1061 (void)printf("\n"); 1062 for (p = s; *p; p++) 1063 (void)printf("%c", ismeta(*p) ? '_' : ' '); 1064 (void)printf("\n"); 1065 } 1066 #endif 1067