1 /* $OpenBSD: glob.c,v 1.25 2005/08/08 08:05:34 espie Exp $ */ 2 /* 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Guido van Rossum. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* OPENBSD ORIGINAL: lib/libc/gen/glob.c */ 35 36 #include "includes.h" 37 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 41 #include <dirent.h> 42 #include <ctype.h> 43 #include <errno.h> 44 #include <pwd.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #if !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || \ 50 !defined(GLOB_HAS_GL_MATCHC) || \ 51 !defined(HAVE_DECL_GLOB_NOMATCH) || HAVE_DECL_GLOB_NOMATCH == 0 52 53 static long 54 get_arg_max(void) 55 { 56 #ifdef ARG_MAX 57 return(ARG_MAX); 58 #elif defined(HAVE_SYSCONF) && defined(_SC_ARG_MAX) 59 return(sysconf(_SC_ARG_MAX)); 60 #else 61 return(256); /* XXX: arbitrary */ 62 #endif 63 } 64 65 /* 66 * glob(3) -- a superset of the one defined in POSIX 1003.2. 67 * 68 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 69 * 70 * Optional extra services, controlled by flags not defined by POSIX: 71 * 72 * GLOB_QUOTE: 73 * Escaping convention: \ inhibits any special meaning the following 74 * character might have (except \ at end of string is retained). 75 * GLOB_MAGCHAR: 76 * Set in gl_flags if pattern contained a globbing character. 77 * GLOB_NOMAGIC: 78 * Same as GLOB_NOCHECK, but it will only append pattern if it did 79 * not contain any magic characters. [Used in csh style globbing] 80 * GLOB_ALTDIRFUNC: 81 * Use alternately specified directory access functions. 82 * GLOB_TILDE: 83 * expand ~user/foo to the /home/dir/of/user/foo 84 * GLOB_BRACE: 85 * expand {1,2}{a,b} to 1a 1b 2a 2b 86 * gl_matchc: 87 * Number of matches in the current invocation of glob. 88 */ 89 90 91 #define DOLLAR '$' 92 #define DOT '.' 93 #define EOS '\0' 94 #define LBRACKET '[' 95 #define NOT '!' 96 #define QUESTION '?' 97 #define QUOTE '\\' 98 #define RANGE '-' 99 #define RBRACKET ']' 100 #define SEP '/' 101 #define STAR '*' 102 #undef TILDE /* Some platforms may already define it */ 103 #define TILDE '~' 104 #define UNDERSCORE '_' 105 #define LBRACE '{' 106 #define RBRACE '}' 107 #define SLASH '/' 108 #define COMMA ',' 109 110 #ifndef DEBUG 111 112 #define M_QUOTE 0x8000 113 #define M_PROTECT 0x4000 114 #define M_MASK 0xffff 115 #define M_ASCII 0x00ff 116 117 typedef u_short Char; 118 119 #else 120 121 #define M_QUOTE 0x80 122 #define M_PROTECT 0x40 123 #define M_MASK 0xff 124 #define M_ASCII 0x7f 125 126 typedef char Char; 127 128 #endif 129 130 131 #define CHAR(c) ((Char)((c)&M_ASCII)) 132 #define META(c) ((Char)((c)|M_QUOTE)) 133 #define M_ALL META('*') 134 #define M_END META(']') 135 #define M_NOT META('!') 136 #define M_ONE META('?') 137 #define M_RNG META('-') 138 #define M_SET META('[') 139 #define ismeta(c) (((c)&M_QUOTE) != 0) 140 141 142 static int compare(const void *, const void *); 143 static int g_Ctoc(const Char *, char *, u_int); 144 static int g_lstat(Char *, struct stat *, glob_t *); 145 static DIR *g_opendir(Char *, glob_t *); 146 static Char *g_strchr(Char *, int); 147 static int g_stat(Char *, struct stat *, glob_t *); 148 static int glob0(const Char *, glob_t *); 149 static int glob1(Char *, Char *, glob_t *, size_t *); 150 static int glob2(Char *, Char *, Char *, Char *, Char *, Char *, 151 glob_t *, size_t *); 152 static int glob3(Char *, Char *, Char *, Char *, Char *, Char *, 153 Char *, Char *, glob_t *, size_t *); 154 static int globextend(const Char *, glob_t *, size_t *); 155 static const Char * 156 globtilde(const Char *, Char *, size_t, glob_t *); 157 static int globexp1(const Char *, glob_t *); 158 static int globexp2(const Char *, const Char *, glob_t *, int *); 159 static int match(Char *, Char *, Char *); 160 #ifdef DEBUG 161 static void qprintf(const char *, Char *); 162 #endif 163 164 int 165 glob(const char *pattern, int flags, int (*errfunc)(const char *, int), 166 glob_t *pglob) 167 { 168 const u_char *patnext; 169 int c; 170 Char *bufnext, *bufend, patbuf[MAXPATHLEN]; 171 172 patnext = (u_char *) pattern; 173 if (!(flags & GLOB_APPEND)) { 174 pglob->gl_pathc = 0; 175 pglob->gl_pathv = NULL; 176 if (!(flags & GLOB_DOOFFS)) 177 pglob->gl_offs = 0; 178 } 179 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 180 pglob->gl_errfunc = errfunc; 181 pglob->gl_matchc = 0; 182 183 bufnext = patbuf; 184 bufend = bufnext + MAXPATHLEN - 1; 185 if (flags & GLOB_NOESCAPE) 186 while (bufnext < bufend && (c = *patnext++) != EOS) 187 *bufnext++ = c; 188 else { 189 /* Protect the quoted characters. */ 190 while (bufnext < bufend && (c = *patnext++) != EOS) 191 if (c == QUOTE) { 192 if ((c = *patnext++) == EOS) { 193 c = QUOTE; 194 --patnext; 195 } 196 *bufnext++ = c | M_PROTECT; 197 } else 198 *bufnext++ = c; 199 } 200 *bufnext = EOS; 201 202 if (flags & GLOB_BRACE) 203 return globexp1(patbuf, pglob); 204 else 205 return glob0(patbuf, pglob); 206 } 207 208 /* 209 * Expand recursively a glob {} pattern. When there is no more expansion 210 * invoke the standard globbing routine to glob the rest of the magic 211 * characters 212 */ 213 static int 214 globexp1(const Char *pattern, glob_t *pglob) 215 { 216 const Char* ptr = pattern; 217 int rv; 218 219 /* Protect a single {}, for find(1), like csh */ 220 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) 221 return glob0(pattern, pglob); 222 223 while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL) 224 if (!globexp2(ptr, pattern, pglob, &rv)) 225 return rv; 226 227 return glob0(pattern, pglob); 228 } 229 230 231 /* 232 * Recursive brace globbing helper. Tries to expand a single brace. 233 * If it succeeds then it invokes globexp1 with the new pattern. 234 * If it fails then it tries to glob the rest of the pattern and returns. 235 */ 236 static int 237 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv) 238 { 239 int i; 240 Char *lm, *ls; 241 const Char *pe, *pm, *pl; 242 Char patbuf[MAXPATHLEN]; 243 244 /* copy part up to the brace */ 245 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 246 ; 247 *lm = EOS; 248 ls = lm; 249 250 /* Find the balanced brace */ 251 for (i = 0, pe = ++ptr; *pe; pe++) 252 if (*pe == LBRACKET) { 253 /* Ignore everything between [] */ 254 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 255 ; 256 if (*pe == EOS) { 257 /* 258 * We could not find a matching RBRACKET. 259 * Ignore and just look for RBRACE 260 */ 261 pe = pm; 262 } 263 } else if (*pe == LBRACE) 264 i++; 265 else if (*pe == RBRACE) { 266 if (i == 0) 267 break; 268 i--; 269 } 270 271 /* Non matching braces; just glob the pattern */ 272 if (i != 0 || *pe == EOS) { 273 *rv = glob0(patbuf, pglob); 274 return 0; 275 } 276 277 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 278 switch (*pm) { 279 case LBRACKET: 280 /* Ignore everything between [] */ 281 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 282 ; 283 if (*pm == EOS) { 284 /* 285 * We could not find a matching RBRACKET. 286 * Ignore and just look for RBRACE 287 */ 288 pm = pl; 289 } 290 break; 291 292 case LBRACE: 293 i++; 294 break; 295 296 case RBRACE: 297 if (i) { 298 i--; 299 break; 300 } 301 /* FALLTHROUGH */ 302 case COMMA: 303 if (i && *pm == COMMA) 304 break; 305 else { 306 /* Append the current string */ 307 for (lm = ls; (pl < pm); *lm++ = *pl++) 308 ; 309 310 /* 311 * Append the rest of the pattern after the 312 * closing brace 313 */ 314 for (pl = pe + 1; (*lm++ = *pl++) != EOS; ) 315 ; 316 317 /* Expand the current pattern */ 318 #ifdef DEBUG 319 qprintf("globexp2:", patbuf); 320 #endif 321 *rv = globexp1(patbuf, pglob); 322 323 /* move after the comma, to the next string */ 324 pl = pm + 1; 325 } 326 break; 327 328 default: 329 break; 330 } 331 } 332 *rv = 0; 333 return 0; 334 } 335 336 337 338 /* 339 * expand tilde from the passwd file. 340 */ 341 static const Char * 342 globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob) 343 { 344 struct passwd *pwd; 345 char *h; 346 const Char *p; 347 Char *b, *eb; 348 349 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 350 return pattern; 351 352 /* Copy up to the end of the string or / */ 353 eb = &patbuf[patbuf_len - 1]; 354 for (p = pattern + 1, h = (char *) patbuf; 355 h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 356 ; 357 358 *h = EOS; 359 360 #if 0 361 if (h == (char *)eb) 362 return what; 363 #endif 364 365 if (((char *) patbuf)[0] == EOS) { 366 /* 367 * handle a plain ~ or ~/ by expanding $HOME 368 * first and then trying the password file 369 */ 370 #if 0 371 if (issetugid() != 0 || (h = getenv("HOME")) == NULL) { 372 #endif 373 if ((getuid() != geteuid()) || (h = getenv("HOME")) == NULL) { 374 if ((pwd = getpwuid(getuid())) == NULL) 375 return pattern; 376 else 377 h = pwd->pw_dir; 378 } 379 } else { 380 /* 381 * Expand a ~user 382 */ 383 if ((pwd = getpwnam((char*) patbuf)) == NULL) 384 return pattern; 385 else 386 h = pwd->pw_dir; 387 } 388 389 /* Copy the home directory */ 390 for (b = patbuf; b < eb && *h; *b++ = *h++) 391 ; 392 393 /* Append the rest of the pattern */ 394 while (b < eb && (*b++ = *p++) != EOS) 395 ; 396 *b = EOS; 397 398 return patbuf; 399 } 400 401 402 /* 403 * The main glob() routine: compiles the pattern (optionally processing 404 * quotes), calls glob1() to do the real pattern matching, and finally 405 * sorts the list (unless unsorted operation is requested). Returns 0 406 * if things went well, nonzero if errors occurred. It is not an error 407 * to find no matches. 408 */ 409 static int 410 glob0(const Char *pattern, glob_t *pglob) 411 { 412 const Char *qpatnext; 413 int c, err, oldpathc; 414 Char *bufnext, patbuf[MAXPATHLEN]; 415 size_t limit = 0; 416 417 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 418 oldpathc = pglob->gl_pathc; 419 bufnext = patbuf; 420 421 /* We don't need to check for buffer overflow any more. */ 422 while ((c = *qpatnext++) != EOS) { 423 switch (c) { 424 case LBRACKET: 425 c = *qpatnext; 426 if (c == NOT) 427 ++qpatnext; 428 if (*qpatnext == EOS || 429 g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) { 430 *bufnext++ = LBRACKET; 431 if (c == NOT) 432 --qpatnext; 433 break; 434 } 435 *bufnext++ = M_SET; 436 if (c == NOT) 437 *bufnext++ = M_NOT; 438 c = *qpatnext++; 439 do { 440 *bufnext++ = CHAR(c); 441 if (*qpatnext == RANGE && 442 (c = qpatnext[1]) != RBRACKET) { 443 *bufnext++ = M_RNG; 444 *bufnext++ = CHAR(c); 445 qpatnext += 2; 446 } 447 } while ((c = *qpatnext++) != RBRACKET); 448 pglob->gl_flags |= GLOB_MAGCHAR; 449 *bufnext++ = M_END; 450 break; 451 case QUESTION: 452 pglob->gl_flags |= GLOB_MAGCHAR; 453 *bufnext++ = M_ONE; 454 break; 455 case STAR: 456 pglob->gl_flags |= GLOB_MAGCHAR; 457 /* collapse adjacent stars to one, 458 * to avoid exponential behavior 459 */ 460 if (bufnext == patbuf || bufnext[-1] != M_ALL) 461 *bufnext++ = M_ALL; 462 break; 463 default: 464 *bufnext++ = CHAR(c); 465 break; 466 } 467 } 468 *bufnext = EOS; 469 #ifdef DEBUG 470 qprintf("glob0:", patbuf); 471 #endif 472 473 if ((err = glob1(patbuf, patbuf+MAXPATHLEN-1, pglob, &limit)) != 0) 474 return(err); 475 476 /* 477 * If there was no match we are going to append the pattern 478 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 479 * and the pattern did not contain any magic characters 480 * GLOB_NOMAGIC is there just for compatibility with csh. 481 */ 482 if (pglob->gl_pathc == oldpathc) { 483 if ((pglob->gl_flags & GLOB_NOCHECK) || 484 ((pglob->gl_flags & GLOB_NOMAGIC) && 485 !(pglob->gl_flags & GLOB_MAGCHAR))) 486 return(globextend(pattern, pglob, &limit)); 487 else 488 return(GLOB_NOMATCH); 489 } 490 if (!(pglob->gl_flags & GLOB_NOSORT)) 491 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 492 pglob->gl_pathc - oldpathc, sizeof(char *), compare); 493 return(0); 494 } 495 496 static int 497 compare(const void *p, const void *q) 498 { 499 return(strcmp(*(char **)p, *(char **)q)); 500 } 501 502 static int 503 glob1(Char *pattern, Char *pattern_last, glob_t *pglob, size_t *limitp) 504 { 505 Char pathbuf[MAXPATHLEN]; 506 507 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 508 if (*pattern == EOS) 509 return(0); 510 return(glob2(pathbuf, pathbuf+MAXPATHLEN-1, 511 pathbuf, pathbuf+MAXPATHLEN-1, 512 pattern, pattern_last, pglob, limitp)); 513 } 514 515 /* 516 * The functions glob2 and glob3 are mutually recursive; there is one level 517 * of recursion for each segment in the pattern that contains one or more 518 * meta characters. 519 */ 520 static int 521 glob2(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last, 522 Char *pattern, Char *pattern_last, glob_t *pglob, size_t *limitp) 523 { 524 struct stat sb; 525 Char *p, *q; 526 int anymeta; 527 528 /* 529 * Loop over pattern segments until end of pattern or until 530 * segment with meta character found. 531 */ 532 for (anymeta = 0;;) { 533 if (*pattern == EOS) { /* End of pattern? */ 534 *pathend = EOS; 535 if (g_lstat(pathbuf, &sb, pglob)) 536 return(0); 537 538 if (((pglob->gl_flags & GLOB_MARK) && 539 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 540 (S_ISLNK(sb.st_mode) && 541 (g_stat(pathbuf, &sb, pglob) == 0) && 542 S_ISDIR(sb.st_mode)))) { 543 if (pathend+1 > pathend_last) 544 return (1); 545 *pathend++ = SEP; 546 *pathend = EOS; 547 } 548 ++pglob->gl_matchc; 549 return(globextend(pathbuf, pglob, limitp)); 550 } 551 552 /* Find end of next segment, copy tentatively to pathend. */ 553 q = pathend; 554 p = pattern; 555 while (*p != EOS && *p != SEP) { 556 if (ismeta(*p)) 557 anymeta = 1; 558 if (q+1 > pathend_last) 559 return (1); 560 *q++ = *p++; 561 } 562 563 if (!anymeta) { /* No expansion, do next segment. */ 564 pathend = q; 565 pattern = p; 566 while (*pattern == SEP) { 567 if (pathend+1 > pathend_last) 568 return (1); 569 *pathend++ = *pattern++; 570 } 571 } else 572 /* Need expansion, recurse. */ 573 return(glob3(pathbuf, pathbuf_last, pathend, 574 pathend_last, pattern, pattern_last, 575 p, pattern_last, pglob, limitp)); 576 } 577 /* NOTREACHED */ 578 } 579 580 static int 581 glob3(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last, 582 Char *pattern, Char *pattern_last, Char *restpattern, 583 Char *restpattern_last, glob_t *pglob, size_t *limitp) 584 { 585 struct dirent *dp; 586 DIR *dirp; 587 int err; 588 char buf[MAXPATHLEN]; 589 590 /* 591 * The readdirfunc declaration can't be prototyped, because it is 592 * assigned, below, to two functions which are prototyped in glob.h 593 * and dirent.h as taking pointers to differently typed opaque 594 * structures. 595 */ 596 struct dirent *(*readdirfunc)(void *); 597 598 if (pathend > pathend_last) 599 return (1); 600 *pathend = EOS; 601 errno = 0; 602 603 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 604 /* TODO: don't call for ENOENT or ENOTDIR? */ 605 if (pglob->gl_errfunc) { 606 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 607 return(GLOB_ABORTED); 608 if (pglob->gl_errfunc(buf, errno) || 609 pglob->gl_flags & GLOB_ERR) 610 return(GLOB_ABORTED); 611 } 612 return(0); 613 } 614 615 err = 0; 616 617 /* Search directory for matching names. */ 618 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 619 readdirfunc = pglob->gl_readdir; 620 else 621 readdirfunc = (struct dirent *(*)(void *))readdir; 622 while ((dp = (*readdirfunc)(dirp))) { 623 u_char *sc; 624 Char *dc; 625 626 /* Initial DOT must be matched literally. */ 627 if (dp->d_name[0] == DOT && *pattern != DOT) 628 continue; 629 dc = pathend; 630 sc = (u_char *) dp->d_name; 631 while (dc < pathend_last && (*dc++ = *sc++) != EOS) 632 ; 633 if (dc >= pathend_last) { 634 *dc = EOS; 635 err = 1; 636 break; 637 } 638 639 if (!match(pathend, pattern, restpattern)) { 640 *pathend = EOS; 641 continue; 642 } 643 err = glob2(pathbuf, pathbuf_last, --dc, pathend_last, 644 restpattern, restpattern_last, pglob, limitp); 645 if (err) 646 break; 647 } 648 649 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 650 (*pglob->gl_closedir)(dirp); 651 else 652 closedir(dirp); 653 return(err); 654 } 655 656 657 /* 658 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 659 * add the new item, and update gl_pathc. 660 * 661 * This assumes the BSD realloc, which only copies the block when its size 662 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 663 * behavior. 664 * 665 * Return 0 if new item added, error code if memory couldn't be allocated. 666 * 667 * Invariant of the glob_t structure: 668 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 669 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 670 */ 671 static int 672 globextend(const Char *path, glob_t *pglob, size_t *limitp) 673 { 674 char **pathv; 675 int i; 676 u_int newsize, len; 677 char *copy; 678 const Char *p; 679 680 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs); 681 pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) : 682 malloc(newsize); 683 if (pathv == NULL) { 684 if (pglob->gl_pathv) { 685 free(pglob->gl_pathv); 686 pglob->gl_pathv = NULL; 687 } 688 return(GLOB_NOSPACE); 689 } 690 691 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 692 /* first time around -- clear initial gl_offs items */ 693 pathv += pglob->gl_offs; 694 for (i = pglob->gl_offs; --i >= 0; ) 695 *--pathv = NULL; 696 } 697 pglob->gl_pathv = pathv; 698 699 for (p = path; *p++;) 700 ; 701 len = (size_t)(p - path); 702 *limitp += len; 703 if ((copy = malloc(len)) != NULL) { 704 if (g_Ctoc(path, copy, len)) { 705 free(copy); 706 return(GLOB_NOSPACE); 707 } 708 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 709 } 710 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 711 712 if ((pglob->gl_flags & GLOB_LIMIT) && 713 newsize + *limitp >= (u_int) get_arg_max()) { 714 errno = 0; 715 return(GLOB_NOSPACE); 716 } 717 718 return(copy == NULL ? GLOB_NOSPACE : 0); 719 } 720 721 722 /* 723 * pattern matching function for filenames. Each occurrence of the * 724 * pattern causes a recursion level. 725 */ 726 static int 727 match(Char *name, Char *pat, Char *patend) 728 { 729 int ok, negate_range; 730 Char c, k; 731 732 while (pat < patend) { 733 c = *pat++; 734 switch (c & M_MASK) { 735 case M_ALL: 736 if (pat == patend) 737 return(1); 738 do { 739 if (match(name, pat, patend)) 740 return(1); 741 } while (*name++ != EOS); 742 return(0); 743 case M_ONE: 744 if (*name++ == EOS) 745 return(0); 746 break; 747 case M_SET: 748 ok = 0; 749 if ((k = *name++) == EOS) 750 return(0); 751 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 752 ++pat; 753 while (((c = *pat++) & M_MASK) != M_END) 754 if ((*pat & M_MASK) == M_RNG) { 755 if (c <= k && k <= pat[1]) 756 ok = 1; 757 pat += 2; 758 } else if (c == k) 759 ok = 1; 760 if (ok == negate_range) 761 return(0); 762 break; 763 default: 764 if (*name++ != c) 765 return(0); 766 break; 767 } 768 } 769 return(*name == EOS); 770 } 771 772 /* Free allocated data belonging to a glob_t structure. */ 773 void 774 globfree(glob_t *pglob) 775 { 776 int i; 777 char **pp; 778 779 if (pglob->gl_pathv != NULL) { 780 pp = pglob->gl_pathv + pglob->gl_offs; 781 for (i = pglob->gl_pathc; i--; ++pp) 782 if (*pp) 783 free(*pp); 784 free(pglob->gl_pathv); 785 pglob->gl_pathv = NULL; 786 } 787 } 788 789 static DIR * 790 g_opendir(Char *str, glob_t *pglob) 791 { 792 char buf[MAXPATHLEN]; 793 794 if (!*str) 795 strlcpy(buf, ".", sizeof buf); 796 else { 797 if (g_Ctoc(str, buf, sizeof(buf))) 798 return(NULL); 799 } 800 801 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 802 return((*pglob->gl_opendir)(buf)); 803 804 return(opendir(buf)); 805 } 806 807 static int 808 g_lstat(Char *fn, struct stat *sb, glob_t *pglob) 809 { 810 char buf[MAXPATHLEN]; 811 812 if (g_Ctoc(fn, buf, sizeof(buf))) 813 return(-1); 814 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 815 return((*pglob->gl_lstat)(buf, sb)); 816 return(lstat(buf, sb)); 817 } 818 819 static int 820 g_stat(Char *fn, struct stat *sb, glob_t *pglob) 821 { 822 char buf[MAXPATHLEN]; 823 824 if (g_Ctoc(fn, buf, sizeof(buf))) 825 return(-1); 826 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 827 return((*pglob->gl_stat)(buf, sb)); 828 return(stat(buf, sb)); 829 } 830 831 static Char * 832 g_strchr(Char *str, int ch) 833 { 834 do { 835 if (*str == ch) 836 return (str); 837 } while (*str++); 838 return (NULL); 839 } 840 841 static int 842 g_Ctoc(const Char *str, char *buf, u_int len) 843 { 844 845 while (len--) { 846 if ((*buf++ = *str++) == EOS) 847 return (0); 848 } 849 return (1); 850 } 851 852 #ifdef DEBUG 853 static void 854 qprintf(const char *str, Char *s) 855 { 856 Char *p; 857 858 (void)printf("%s:\n", str); 859 for (p = s; *p; p++) 860 (void)printf("%c", CHAR(*p)); 861 (void)printf("\n"); 862 for (p = s; *p; p++) 863 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 864 (void)printf("\n"); 865 for (p = s; *p; p++) 866 (void)printf("%c", ismeta(*p) ? '_' : ' '); 867 (void)printf("\n"); 868 } 869 #endif 870 871 #endif /* !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || 872 !defined(GLOB_HAS_GL_MATCHC) */ 873 874