1 /* $NetBSD: glob.c,v 1.39 2019/05/29 01:21:33 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 1.39 2019/05/29 01:21:33 christos Exp $"); 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 /* 45 * glob(3) -- a superset of the one defined in POSIX 1003.2. 46 * 47 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 48 * 49 * Optional extra services, controlled by flags not defined by POSIX: 50 * 51 * GLOB_MAGCHAR: 52 * Set in gl_flags if pattern contained a globbing character. 53 * GLOB_NOMAGIC: 54 * Same as GLOB_NOCHECK, but it will only append pattern if it did 55 * not contain any magic characters. [Used in csh style globbing] 56 * GLOB_ALTDIRFUNC: 57 * Use alternately specified directory access functions. 58 * GLOB_TILDE: 59 * expand ~user/foo to the /home/dir/of/user/foo 60 * GLOB_BRACE: 61 * expand {1,2}{a,b} to 1a 1b 2a 2b 62 * GLOB_PERIOD: 63 * allow metacharacters to match leading dots in filenames. 64 * GLOB_NO_DOTDIRS: 65 * . and .. are hidden from wildcards, even if GLOB_PERIOD is set. 66 * gl_matchc: 67 * Number of matches in the current invocation of glob. 68 */ 69 70 #include "namespace.h" 71 #include <sys/param.h> 72 #include <sys/stat.h> 73 74 #include <assert.h> 75 #include <ctype.h> 76 #include <dirent.h> 77 #include <errno.h> 78 #include <glob.h> 79 #include <pwd.h> 80 #include <stdio.h> 81 #include <stddef.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <unistd.h> 85 86 #ifdef HAVE_NBTOOL_CONFIG_H 87 #define NO_GETPW_R 88 #endif 89 90 #define GLOB_LIMIT_STRING 524288 /* number of readdirs */ 91 #define GLOB_LIMIT_STAT 128 /* number of stat system calls */ 92 #define GLOB_LIMIT_READDIR 65536 /* total buffer size of path strings */ 93 #define GLOB_LIMIT_PATH 1024 /* number of path elements */ 94 #define GLOB_LIMIT_BRACE 128 /* Number of brace calls */ 95 96 struct glob_limit { 97 size_t l_string; 98 size_t l_stat; 99 size_t l_readdir; 100 size_t l_brace; 101 }; 102 103 /* 104 * XXX: For NetBSD 1.4.x compatibility. (kill me l8r) 105 */ 106 #ifndef _DIAGASSERT 107 #define _DIAGASSERT(a) 108 #endif 109 110 #define DOLLAR '$' 111 #define DOT '.' 112 #define EOS '\0' 113 #define LBRACKET '[' 114 #define NOT '!' 115 #define QUESTION '?' 116 #define QUOTE '\\' 117 #define RANGE '-' 118 #define RBRACKET ']' 119 #define SEP '/' 120 #define STAR '*' 121 #define TILDE '~' 122 #define UNDERSCORE '_' 123 #define LBRACE '{' 124 #define RBRACE '}' 125 #define SLASH '/' 126 #define COMMA ',' 127 128 #ifndef USE_8BIT_CHARS 129 130 #define M_QUOTE 0x8000 131 #define M_PROTECT 0x4000 132 #define M_MASK 0xffff 133 #define M_ASCII 0x00ff 134 135 typedef unsigned short Char; 136 137 #else 138 139 #define M_QUOTE (Char)0x80 140 #define M_PROTECT (Char)0x40 141 #define M_MASK (Char)0xff 142 #define M_ASCII (Char)0x7f 143 144 typedef char Char; 145 146 #endif 147 148 149 #define CHAR(c) ((Char)((c)&M_ASCII)) 150 #define META(c) ((Char)((c)|M_QUOTE)) 151 #define M_ALL META('*') 152 #define M_END META(']') 153 #define M_NOT META('!') 154 #define M_ONE META('?') 155 #define M_RNG META('-') 156 #define M_SET META('[') 157 #define ismeta(c) (((c)&M_QUOTE) != 0) 158 159 160 static int compare(const void *, const void *); 161 static int g_Ctoc(const Char *, char *, size_t); 162 static int g_lstat(Char *, __gl_stat_t *, glob_t *); 163 static DIR *g_opendir(Char *, glob_t *); 164 static Char *g_strchr(const Char *, int); 165 static int g_stat(Char *, __gl_stat_t *, glob_t *); 166 static int glob0(const Char *, glob_t *, struct glob_limit *); 167 static int glob1(Char *, glob_t *, struct glob_limit *); 168 static int glob2(Char *, Char *, Char *, const Char *, glob_t *, 169 struct glob_limit *); 170 static int glob3(Char *, Char *, Char *, const Char *, const Char *, 171 const Char *, glob_t *, struct glob_limit *); 172 static int globextend(const Char *, glob_t *, struct glob_limit *); 173 static int globtilde(const Char **, const Char *, Char *, size_t, 174 glob_t *); 175 static int globexp1(const Char *, glob_t *, struct glob_limit *); 176 static int globexp2(const Char *, const Char *, glob_t *, int *, 177 struct glob_limit *); 178 static int match(const Char *, const Char *, const Char *); 179 #ifdef DEBUG 180 static void qprintf(const char *, Char *); 181 #endif 182 183 int 184 glob(const char * __restrict pattern, int flags, int (*errfunc)(const char *, 185 int), glob_t * __restrict pglob) 186 { 187 const unsigned char *patnext; 188 int c; 189 Char *bufnext, *bufend, patbuf[MAXPATHLEN+1]; 190 struct glob_limit limit = { 0, 0, 0, 0 }; 191 192 _DIAGASSERT(pattern != NULL); 193 194 patnext = (const unsigned char *) pattern; 195 if (!(flags & GLOB_APPEND)) { 196 pglob->gl_pathc = 0; 197 pglob->gl_pathv = NULL; 198 if (!(flags & GLOB_DOOFFS)) 199 pglob->gl_offs = 0; 200 } 201 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 202 pglob->gl_errfunc = errfunc; 203 pglob->gl_matchc = 0; 204 205 bufnext = patbuf; 206 bufend = bufnext + MAXPATHLEN; 207 if (flags & GLOB_NOESCAPE) { 208 while (bufnext < bufend && (c = *patnext++) != EOS) 209 *bufnext++ = c; 210 } else { 211 /* Protect the quoted characters. */ 212 while (bufnext < bufend && (c = *patnext++) != EOS) 213 if (c == QUOTE) { 214 if ((c = *patnext++) == EOS) { 215 c = QUOTE; 216 --patnext; 217 } 218 *bufnext++ = c | M_PROTECT; 219 } 220 else 221 *bufnext++ = c; 222 } 223 *bufnext = EOS; 224 225 if (flags & GLOB_BRACE) 226 return globexp1(patbuf, pglob, &limit); 227 else 228 return glob0(patbuf, pglob, &limit); 229 } 230 231 /* 232 * Expand recursively a glob {} pattern. When there is no more expansion 233 * invoke the standard globbing routine to glob the rest of the magic 234 * characters 235 */ 236 static int 237 globexp1(const Char *pattern, glob_t *pglob, struct glob_limit *limit) 238 { 239 const Char* ptr = pattern; 240 int rv; 241 242 _DIAGASSERT(pattern != NULL); 243 _DIAGASSERT(pglob != NULL); 244 245 if ((pglob->gl_flags & GLOB_LIMIT) && 246 limit->l_brace++ >= GLOB_LIMIT_BRACE) { 247 errno = 0; 248 return GLOB_NOSPACE; 249 } 250 251 /* Protect a single {}, for find(1), like csh */ 252 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 253 return glob0(pattern, pglob, limit); 254 255 while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL) 256 if (!globexp2(ptr, pattern, pglob, &rv, limit)) 257 return rv; 258 259 return glob0(pattern, pglob, limit); 260 } 261 262 263 /* 264 * Recursive brace globbing helper. Tries to expand a single brace. 265 * If it succeeds then it invokes globexp1 with the new pattern. 266 * If it fails then it tries to glob the rest of the pattern and returns. 267 */ 268 static int 269 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv, 270 struct glob_limit *limit) 271 { 272 int i; 273 Char *lm, *ls; 274 const Char *pe, *pm, *pl; 275 Char patbuf[MAXPATHLEN + 1]; 276 277 _DIAGASSERT(ptr != NULL); 278 _DIAGASSERT(pattern != NULL); 279 _DIAGASSERT(pglob != NULL); 280 _DIAGASSERT(rv != NULL); 281 282 /* copy part up to the brace */ 283 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 284 continue; 285 ls = lm; 286 287 /* Find the balanced brace */ 288 for (i = 0, pe = ++ptr; *pe; pe++) 289 if (*pe == LBRACKET) { 290 /* Ignore everything between [] */ 291 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 292 continue; 293 if (*pe == EOS) { 294 /* 295 * We could not find a matching RBRACKET. 296 * Ignore and just look for RBRACE 297 */ 298 pe = pm; 299 } 300 } 301 else if (*pe == LBRACE) 302 i++; 303 else if (*pe == RBRACE) { 304 if (i == 0) 305 break; 306 i--; 307 } 308 309 /* Non matching braces; just glob the pattern */ 310 if (i != 0 || *pe == EOS) { 311 /* 312 * we use `pattern', not `patbuf' here so that that 313 * unbalanced braces are passed to the match 314 */ 315 *rv = glob0(pattern, pglob, limit); 316 return 0; 317 } 318 319 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 320 switch (*pm) { 321 case LBRACKET: 322 /* Ignore everything between [] */ 323 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 324 continue; 325 if (*pm == EOS) { 326 /* 327 * We could not find a matching RBRACKET. 328 * Ignore and just look for RBRACE 329 */ 330 pm = pl; 331 } 332 break; 333 334 case LBRACE: 335 i++; 336 break; 337 338 case RBRACE: 339 if (i) { 340 i--; 341 break; 342 } 343 /* FALLTHROUGH */ 344 case COMMA: 345 if (i && *pm == COMMA) 346 break; 347 else { 348 /* Append the current string */ 349 for (lm = ls; (pl < pm); *lm++ = *pl++) 350 continue; 351 /* 352 * Append the rest of the pattern after the 353 * closing brace 354 */ 355 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 356 continue; 357 358 /* Expand the current pattern */ 359 #ifdef DEBUG 360 qprintf("globexp2", patbuf); 361 #endif 362 *rv = globexp1(patbuf, pglob, limit); 363 364 /* move after the comma, to the next string */ 365 pl = pm + 1; 366 } 367 break; 368 369 default: 370 break; 371 } 372 } 373 *rv = 0; 374 return 0; 375 } 376 377 378 379 /* 380 * expand tilde from the passwd file. 381 */ 382 static int 383 globtilde(const Char **qpatnext, const Char *pattern, Char *patbuf, 384 size_t patsize, glob_t *pglob) 385 { 386 struct passwd *pwd; 387 const char *h; 388 const Char *p; 389 Char *b; 390 char *d; 391 Char *pend = &patbuf[patsize / sizeof(Char)]; 392 #ifndef NO_GETPW_R 393 struct passwd pwres; 394 char pwbuf[1024]; 395 #endif 396 397 pend--; 398 399 _DIAGASSERT(pattern != NULL); 400 _DIAGASSERT(patbuf != NULL); 401 _DIAGASSERT(pglob != NULL); 402 *qpatnext = pattern; 403 404 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 405 return 0; 406 407 /* Copy up to the end of the string or / */ 408 for (p = pattern + 1, d = (char *)(void *)patbuf; 409 d < (char *)(void *)pend && *p && *p != SLASH; 410 *d++ = *p++) 411 continue; 412 413 if (d == (char *)(void *)pend) 414 return GLOB_ABEND; 415 416 *d = EOS; 417 d = (char *)(void *)patbuf; 418 419 if (*d == EOS) { 420 /* 421 * handle a plain ~ or ~/ by expanding $HOME 422 * first and then trying the password file 423 */ 424 if ((h = getenv("HOME")) == NULL) { 425 #ifdef NO_GETPW_R 426 if ((pwd = getpwuid(getuid())) == NULL) 427 #else 428 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf), 429 &pwd) != 0 || pwd == NULL) 430 #endif 431 goto nouser; 432 h = pwd->pw_dir; 433 } 434 } 435 else { 436 /* 437 * Expand a ~user 438 */ 439 #ifdef NO_GETPW_R 440 if ((pwd = getpwnam(d)) == NULL) 441 #else 442 if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 || 443 pwd == NULL) 444 #endif 445 goto nouser; 446 h = pwd->pw_dir; 447 } 448 449 /* Copy the home directory */ 450 for (b = patbuf; b < pend && *h; *b++ = *h++) 451 continue; 452 453 if (b == pend) 454 return GLOB_ABEND; 455 456 /* Append the rest of the pattern */ 457 while (b < pend && (*b++ = *p++) != EOS) 458 continue; 459 460 if (b == pend) 461 return GLOB_ABEND; 462 463 *qpatnext = patbuf; 464 return 0; 465 nouser: 466 return (pglob->gl_flags & GLOB_TILDE_CHECK) ? GLOB_NOMATCH : 0; 467 } 468 469 470 /* 471 * The main glob() routine: compiles the pattern (optionally processing 472 * quotes), calls glob1() to do the real pattern matching, and finally 473 * sorts the list (unless unsorted operation is requested). Returns 0 474 * if things went well, nonzero if errors occurred. It is not an error 475 * to find no matches. 476 */ 477 static int 478 glob0(const Char *pattern, glob_t *pglob, struct glob_limit *limit) 479 { 480 const Char *qpatnext; 481 int c, error; 482 __gl_size_t oldpathc; 483 Char *bufnext, patbuf[MAXPATHLEN+1]; 484 485 _DIAGASSERT(pattern != NULL); 486 _DIAGASSERT(pglob != NULL); 487 488 if ((error = globtilde(&qpatnext, pattern, patbuf, sizeof(patbuf), 489 pglob)) != 0) 490 return error; 491 oldpathc = pglob->gl_pathc; 492 bufnext = patbuf; 493 494 /* We don't need to check for buffer overflow any more. */ 495 while ((c = *qpatnext++) != EOS) { 496 switch (c) { 497 case LBRACKET: 498 c = *qpatnext; 499 if (c == NOT) 500 ++qpatnext; 501 if (*qpatnext == EOS || 502 g_strchr(qpatnext+1, RBRACKET) == NULL) { 503 *bufnext++ = LBRACKET; 504 if (c == NOT) 505 --qpatnext; 506 break; 507 } 508 *bufnext++ = M_SET; 509 if (c == NOT) 510 *bufnext++ = M_NOT; 511 c = *qpatnext++; 512 do { 513 *bufnext++ = CHAR(c); 514 if (*qpatnext == RANGE && 515 (c = qpatnext[1]) != RBRACKET) { 516 *bufnext++ = M_RNG; 517 *bufnext++ = CHAR(c); 518 qpatnext += 2; 519 } 520 } while ((c = *qpatnext++) != RBRACKET); 521 pglob->gl_flags |= GLOB_MAGCHAR; 522 *bufnext++ = M_END; 523 break; 524 case QUESTION: 525 pglob->gl_flags |= GLOB_MAGCHAR; 526 *bufnext++ = M_ONE; 527 break; 528 case STAR: 529 pglob->gl_flags |= GLOB_MAGCHAR; 530 /* collapse adjacent stars to one [or three if globstar] 531 * to avoid exponential behavior 532 */ 533 if (bufnext == patbuf || bufnext[-1] != M_ALL || 534 ((pglob->gl_flags & GLOB_STAR) != 0 && 535 (bufnext - 1 == patbuf || bufnext[-2] != M_ALL || 536 bufnext - 2 == patbuf || bufnext[-3] != M_ALL))) 537 *bufnext++ = M_ALL; 538 break; 539 default: 540 *bufnext++ = CHAR(c); 541 break; 542 } 543 } 544 *bufnext = EOS; 545 #ifdef DEBUG 546 qprintf("glob0", patbuf); 547 #endif 548 549 if ((error = glob1(patbuf, pglob, limit)) != 0) 550 return error; 551 552 if (pglob->gl_pathc == oldpathc) { 553 /* 554 * If there was no match we are going to append the pattern 555 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was 556 * specified and the pattern did not contain any magic 557 * characters GLOB_NOMAGIC is there just for compatibility 558 * with csh. 559 */ 560 if ((pglob->gl_flags & GLOB_NOCHECK) || 561 ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR)) 562 == GLOB_NOMAGIC)) { 563 return globextend(pattern, pglob, limit); 564 } else { 565 return GLOB_NOMATCH; 566 } 567 } else if (!(pglob->gl_flags & GLOB_NOSORT)) { 568 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 569 (size_t)pglob->gl_pathc - oldpathc, sizeof(char *), 570 compare); 571 } 572 573 return 0; 574 } 575 576 static int 577 compare(const void *p, const void *q) 578 { 579 580 _DIAGASSERT(p != NULL); 581 _DIAGASSERT(q != NULL); 582 583 return strcoll(*(const char * const *)p, *(const char * const *)q); 584 } 585 586 static int 587 glob1(Char *pattern, glob_t *pglob, struct glob_limit *limit) 588 { 589 Char pathbuf[MAXPATHLEN+1]; 590 591 _DIAGASSERT(pattern != NULL); 592 _DIAGASSERT(pglob != NULL); 593 594 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 595 if (*pattern == EOS) 596 return 0; 597 /* 598 * we save one character so that we can use ptr >= limit, 599 * in the general case when we are appending non nul chars only. 600 */ 601 return glob2(pathbuf, pathbuf, 602 pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern, 603 pglob, limit); 604 } 605 606 /* 607 * The functions glob2 and glob3 are mutually recursive; there is one level 608 * of recursion for each segment in the pattern that contains one or more 609 * meta characters. 610 */ 611 static int 612 glob2(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern, 613 glob_t *pglob, struct glob_limit *limit) 614 { 615 __gl_stat_t sb; 616 const Char *p; 617 Char *q; 618 int anymeta; 619 620 _DIAGASSERT(pathbuf != NULL); 621 _DIAGASSERT(pathend != NULL); 622 _DIAGASSERT(pattern != NULL); 623 _DIAGASSERT(pglob != NULL); 624 625 #ifdef DEBUG 626 qprintf("glob2", pathbuf); 627 #endif 628 /* 629 * Loop over pattern segments until end of pattern or until 630 * segment with meta character found. 631 */ 632 for (anymeta = 0;;) { 633 if (*pattern == EOS) { /* End of pattern? */ 634 *pathend = EOS; 635 if (g_lstat(pathbuf, &sb, pglob)) 636 return 0; 637 638 if ((pglob->gl_flags & GLOB_LIMIT) && 639 limit->l_stat++ >= GLOB_LIMIT_STAT) { 640 errno = 0; 641 *pathend++ = SEP; 642 *pathend = EOS; 643 return GLOB_NOSPACE; 644 } 645 if (((pglob->gl_flags & GLOB_MARK) && 646 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 647 (S_ISLNK(sb.st_mode) && 648 (g_stat(pathbuf, &sb, pglob) == 0) && 649 S_ISDIR(sb.st_mode)))) { 650 if (pathend >= pathlim) 651 return GLOB_ABORTED; 652 *pathend++ = SEP; 653 *pathend = EOS; 654 } 655 ++pglob->gl_matchc; 656 return globextend(pathbuf, pglob, limit); 657 } 658 659 /* Find end of next segment, copy tentatively to pathend. */ 660 q = pathend; 661 p = pattern; 662 while (*p != EOS && *p != SEP) { 663 if (ismeta(*p)) 664 anymeta = 1; 665 if (q >= pathlim) 666 return GLOB_ABORTED; 667 *q++ = *p++; 668 } 669 670 if (!anymeta) { 671 pathend = q; 672 pattern = p; 673 while (*pattern == SEP) { 674 if (pathend >= pathlim) 675 return GLOB_ABORTED; 676 *pathend++ = *pattern++; 677 } 678 } else /* Need expansion, recurse. */ 679 return glob3(pathbuf, pathend, pathlim, pattern, p, 680 pattern, pglob, limit); 681 } 682 /* NOTREACHED */ 683 } 684 685 static int 686 glob3(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern, 687 const Char *restpattern, const Char *pglobstar, glob_t *pglob, 688 struct glob_limit *limit) 689 { 690 struct dirent *dp; 691 DIR *dirp; 692 __gl_stat_t sbuf; 693 int error; 694 char buf[MAXPATHLEN]; 695 int globstar = 0; 696 int chase_symlinks = 0; 697 const Char *termstar = NULL; 698 699 /* 700 * The readdirfunc declaration can't be prototyped, because it is 701 * assigned, below, to two functions which are prototyped in glob.h 702 * and dirent.h as taking pointers to differently typed opaque 703 * structures. 704 */ 705 struct dirent *(*readdirfunc)(void *); 706 707 _DIAGASSERT(pathbuf != NULL); 708 _DIAGASSERT(pathend != NULL); 709 _DIAGASSERT(pattern != NULL); 710 _DIAGASSERT(restpattern != NULL); 711 _DIAGASSERT(pglob != NULL); 712 713 *pathend = EOS; 714 errno = 0; 715 716 while (pglobstar < restpattern) { 717 if ((pglobstar[0] & M_MASK) == M_ALL && 718 (pglobstar[1] & M_MASK) == M_ALL) { 719 globstar = 1; 720 chase_symlinks = (pglobstar[2] & M_MASK) == M_ALL; 721 termstar = pglobstar + (2 + chase_symlinks); 722 break; 723 } 724 pglobstar++; 725 } 726 727 if (globstar) { 728 error = pglobstar == pattern && termstar == restpattern ? 729 *restpattern == EOS ? 730 glob2(pathbuf, pathend, pathlim, restpattern - 1, pglob, 731 limit) : 732 glob2(pathbuf, pathend, pathlim, restpattern + 1, pglob, 733 limit) : 734 glob3(pathbuf, pathend, pathlim, pattern, restpattern, 735 termstar, pglob, limit); 736 if (error) 737 return error; 738 *pathend = EOS; 739 } 740 741 if (*pathbuf && (g_lstat(pathbuf, &sbuf, pglob) || 742 !S_ISDIR(sbuf.st_mode) 743 #ifdef S_IFLINK 744 && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode)) 745 #endif 746 )) 747 return 0; 748 749 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 750 if (pglob->gl_errfunc) { 751 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 752 return GLOB_ABORTED; 753 if (pglob->gl_errfunc(buf, errno) || 754 pglob->gl_flags & GLOB_ERR) 755 return GLOB_ABORTED; 756 } 757 /* 758 * Posix/XOpen: glob should return when it encounters a 759 * directory that it cannot open or read 760 * XXX: Should we ignore ENOTDIR and ENOENT though? 761 * I think that Posix had in mind EPERM... 762 */ 763 if (pglob->gl_flags & GLOB_ERR) 764 return GLOB_ABORTED; 765 766 return 0; 767 } 768 769 error = 0; 770 771 /* Search directory for matching names. */ 772 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 773 readdirfunc = pglob->gl_readdir; 774 else 775 readdirfunc = (struct dirent *(*)(void *)) readdir; 776 while ((dp = (*readdirfunc)(dirp)) != NULL) { 777 unsigned char *sc; 778 Char *dc; 779 780 if ((pglob->gl_flags & GLOB_LIMIT) && 781 limit->l_readdir++ >= GLOB_LIMIT_READDIR) { 782 errno = 0; 783 *pathend++ = SEP; 784 *pathend = EOS; 785 error = GLOB_NOSPACE; 786 break; 787 } 788 789 /* 790 * Initial DOT must be matched literally, unless we have 791 * GLOB_PERIOD set. 792 */ 793 if ((pglob->gl_flags & GLOB_PERIOD) == 0) 794 if (dp->d_name[0] == DOT && *pattern != DOT) 795 continue; 796 /* 797 * If GLOB_NO_DOTDIRS is set, . and .. vanish. 798 */ 799 if ((pglob->gl_flags & GLOB_NO_DOTDIRS) && 800 (dp->d_name[0] == DOT) && 801 ((dp->d_name[1] == EOS) || 802 ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS)))) 803 continue; 804 /* 805 * The resulting string contains EOS, so we can 806 * use the pathlim character, if it is the nul 807 */ 808 for (sc = (unsigned char *) dp->d_name, dc = pathend; 809 dc <= pathlim && (*dc++ = *sc++) != EOS;) 810 continue; 811 812 /* 813 * Have we filled the buffer without seeing EOS? 814 */ 815 if (dc > pathlim && *pathlim != EOS) { 816 /* 817 * Abort when requested by caller, otherwise 818 * reset pathend back to last SEP and continue 819 * with next dir entry. 820 */ 821 if (pglob->gl_flags & GLOB_ERR) { 822 error = GLOB_ABORTED; 823 break; 824 } 825 else { 826 *pathend = EOS; 827 continue; 828 } 829 } 830 831 if (globstar) { 832 #ifdef S_IFLNK 833 if (!chase_symlinks && 834 (g_lstat(pathbuf, &sbuf, pglob) || 835 S_ISLNK(sbuf.st_mode))) 836 continue; 837 #endif 838 839 if (!match(pathend, pattern, termstar)) 840 continue; 841 842 if (--dc < pathlim - 2) 843 *dc++ = SEP; 844 *dc = EOS; 845 error = glob2(pathbuf, dc, pathlim, pglobstar, 846 pglob, limit); 847 if (error) 848 break; 849 *pathend = EOS; 850 } else { 851 if (!match(pathend, pattern, restpattern)) { 852 *pathend = EOS; 853 continue; 854 } 855 error = glob2(pathbuf, --dc, pathlim, restpattern, 856 pglob, limit); 857 if (error) 858 break; 859 } 860 } 861 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 862 (*pglob->gl_closedir)(dirp); 863 else 864 closedir(dirp); 865 866 /* 867 * Again Posix X/Open issue with regards to error handling. 868 */ 869 if ((error || errno) && (pglob->gl_flags & GLOB_ERR)) 870 return GLOB_ABORTED; 871 872 return error; 873 } 874 875 876 /* 877 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 878 * add the new item, and update gl_pathc. 879 * 880 * This assumes the BSD realloc, which only copies the block when its size 881 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 882 * behavior. 883 * 884 * Return 0 if new item added, error code if memory couldn't be allocated. 885 * 886 * Invariant of the glob_t structure: 887 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 888 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 889 */ 890 static int 891 globextend(const Char *path, glob_t *pglob, struct glob_limit *limit) 892 { 893 char **pathv; 894 size_t i, newsize, len; 895 char *copy; 896 const Char *p; 897 898 _DIAGASSERT(path != NULL); 899 _DIAGASSERT(pglob != NULL); 900 901 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 902 if ((pglob->gl_flags & GLOB_LIMIT) && 903 newsize > GLOB_LIMIT_PATH * sizeof(*pathv)) 904 goto nospace; 905 pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) : 906 malloc(newsize); 907 if (pathv == NULL) 908 return GLOB_NOSPACE; 909 910 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 911 /* first time around -- clear initial gl_offs items */ 912 pathv += pglob->gl_offs; 913 for (i = pglob->gl_offs + 1; --i > 0; ) 914 *--pathv = NULL; 915 } 916 pglob->gl_pathv = pathv; 917 918 for (p = path; *p++;) 919 continue; 920 len = (size_t)(p - path); 921 limit->l_string += len; 922 if ((copy = malloc(len)) != NULL) { 923 if (g_Ctoc(path, copy, len)) { 924 free(copy); 925 return GLOB_ABORTED; 926 } 927 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 928 } 929 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 930 931 if ((pglob->gl_flags & GLOB_LIMIT) && 932 (newsize + limit->l_string) >= GLOB_LIMIT_STRING) 933 goto nospace; 934 935 return copy == NULL ? GLOB_NOSPACE : 0; 936 nospace: 937 errno = 0; 938 return GLOB_NOSPACE; 939 } 940 941 942 /* 943 * pattern matching function for filenames. 944 */ 945 static int 946 match(const Char *name, const Char *pat, const Char *patend) 947 { 948 int ok, negate_range; 949 Char c, k; 950 const Char *patNext, *nameNext, *nameStart, *nameEnd; 951 952 _DIAGASSERT(name != NULL); 953 _DIAGASSERT(pat != NULL); 954 _DIAGASSERT(patend != NULL); 955 patNext = pat; 956 nameStart = nameNext = name; 957 nameEnd = NULL; 958 959 while (pat < patend || *name) { 960 c = *pat; 961 if (*name == EOS) 962 nameEnd = name; 963 switch (c & M_MASK) { 964 case M_ALL: 965 while ((pat[1] & M_MASK) == M_ALL) pat++; 966 patNext = pat; 967 nameNext = name + 1; 968 pat++; 969 continue; 970 case M_ONE: 971 if (*name == EOS) 972 break; 973 pat++; 974 name++; 975 continue; 976 case M_SET: 977 ok = 0; 978 if ((k = *name) == EOS) 979 break; 980 pat++; 981 name++; 982 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 983 ++pat; 984 while (((c = *pat++) & M_MASK) != M_END) 985 if ((*pat & M_MASK) == M_RNG) { 986 if (c <= k && k <= pat[1]) 987 ok = 1; 988 pat += 2; 989 } else if (c == k) 990 ok = 1; 991 if (ok == negate_range) 992 break; 993 continue; 994 default: 995 if (*name != c) 996 break; 997 pat++; 998 name++; 999 continue; 1000 } 1001 if (nameNext != nameStart 1002 && (nameEnd == NULL || nameNext <= nameEnd)) { 1003 pat = patNext; 1004 name = nameNext; 1005 continue; 1006 } 1007 return 0; 1008 } 1009 return 1; 1010 } 1011 1012 /* Free allocated data belonging to a glob_t structure. */ 1013 void 1014 globfree(glob_t *pglob) 1015 { 1016 size_t i; 1017 char **pp; 1018 1019 _DIAGASSERT(pglob != NULL); 1020 1021 if (pglob->gl_pathv != NULL) { 1022 pp = pglob->gl_pathv + pglob->gl_offs; 1023 for (i = pglob->gl_pathc; i--; ++pp) 1024 if (*pp) 1025 free(*pp); 1026 free(pglob->gl_pathv); 1027 pglob->gl_pathv = NULL; 1028 pglob->gl_pathc = 0; 1029 } 1030 } 1031 1032 #ifndef __LIBC12_SOURCE__ 1033 int 1034 glob_pattern_p(const char *pattern, int quote) 1035 { 1036 int range = 0; 1037 1038 for (; *pattern; pattern++) 1039 switch (*pattern) { 1040 case QUESTION: 1041 case STAR: 1042 return 1; 1043 1044 case QUOTE: 1045 if (quote && pattern[1] != EOS) 1046 ++pattern; 1047 break; 1048 1049 case LBRACKET: 1050 range = 1; 1051 break; 1052 1053 case RBRACKET: 1054 if (range) 1055 return 1; 1056 break; 1057 default: 1058 break; 1059 } 1060 1061 return 0; 1062 } 1063 #endif 1064 1065 static DIR * 1066 g_opendir(Char *str, glob_t *pglob) 1067 { 1068 char buf[MAXPATHLEN]; 1069 1070 _DIAGASSERT(str != NULL); 1071 _DIAGASSERT(pglob != NULL); 1072 1073 if (!*str) 1074 (void)strlcpy(buf, ".", sizeof(buf)); 1075 else { 1076 if (g_Ctoc(str, buf, sizeof(buf))) 1077 return NULL; 1078 } 1079 1080 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1081 return (*pglob->gl_opendir)(buf); 1082 1083 return opendir(buf); 1084 } 1085 1086 static int 1087 g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 1088 { 1089 char buf[MAXPATHLEN]; 1090 1091 _DIAGASSERT(fn != NULL); 1092 _DIAGASSERT(sb != NULL); 1093 _DIAGASSERT(pglob != NULL); 1094 1095 if (g_Ctoc(fn, buf, sizeof(buf))) 1096 return -1; 1097 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1098 return (*pglob->gl_lstat)(buf, sb); 1099 return lstat(buf, sb); 1100 } 1101 1102 static int 1103 g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob) 1104 { 1105 char buf[MAXPATHLEN]; 1106 1107 _DIAGASSERT(fn != NULL); 1108 _DIAGASSERT(sb != NULL); 1109 _DIAGASSERT(pglob != NULL); 1110 1111 if (g_Ctoc(fn, buf, sizeof(buf))) 1112 return -1; 1113 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1114 return (*pglob->gl_stat)(buf, sb); 1115 return stat(buf, sb); 1116 } 1117 1118 static Char * 1119 g_strchr(const Char *str, int ch) 1120 { 1121 1122 _DIAGASSERT(str != NULL); 1123 1124 do { 1125 if (*str == ch) 1126 return __UNCONST(str); 1127 } while (*str++); 1128 return NULL; 1129 } 1130 1131 static int 1132 g_Ctoc(const Char *str, char *buf, size_t len) 1133 { 1134 char *dc; 1135 1136 _DIAGASSERT(str != NULL); 1137 _DIAGASSERT(buf != NULL); 1138 1139 if (len == 0) 1140 return 1; 1141 1142 for (dc = buf; len && (*dc++ = *str++) != EOS; len--) 1143 continue; 1144 1145 return len == 0; 1146 } 1147 1148 #ifdef DEBUG 1149 static void 1150 qprintf(const char *str, Char *s) 1151 { 1152 Char *p; 1153 1154 _DIAGASSERT(str != NULL); 1155 _DIAGASSERT(s != NULL); 1156 1157 (void)printf("%s:\n", str); 1158 for (p = s; *p; p++) 1159 (void)printf("%c", CHAR(*p)); 1160 (void)printf("\n"); 1161 for (p = s; *p; p++) 1162 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 1163 (void)printf("\n"); 1164 for (p = s; *p; p++) 1165 (void)printf("%c", ismeta(*p) ? '_' : ' '); 1166 (void)printf("\n"); 1167 } 1168 #endif 1169
Indexes created Sun Sep 21 20:09:37 GMT 2025