1 /* $OpenBSD: glob.c,v 1.35 2011/01/12 01:53:14 djm 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 /* 37 * glob(3) -- a superset of the one defined in POSIX 1003.2. 38 * 39 * The [!...] convention to negate a range is supported (SysV, Posix, ksh). 40 * 41 * Optional extra services, controlled by flags not defined by POSIX: 42 * 43 * GLOB_QUOTE: 44 * Escaping convention: \ inhibits any special meaning the following 45 * character might have (except \ at end of string is retained). 46 * GLOB_MAGCHAR: 47 * Set in gl_flags if pattern contained a globbing character. 48 * GLOB_NOMAGIC: 49 * Same as GLOB_NOCHECK, but it will only append pattern if it did 50 * not contain any magic characters. [Used in csh style globbing] 51 * GLOB_ALTDIRFUNC: 52 * Use alternately specified directory access functions. 53 * GLOB_TILDE: 54 * expand ~user/foo to the /home/dir/of/user/foo 55 * GLOB_BRACE: 56 * expand {1,2}{a,b} to 1a 1b 2a 2b 57 * gl_matchc: 58 * Number of matches in the current invocation of glob. 59 */ 60 61 #include "includes.h" 62 63 #include <sys/types.h> 64 #include <sys/stat.h> 65 66 #include <dirent.h> 67 #include <ctype.h> 68 #include <errno.h> 69 #include <pwd.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <unistd.h> 73 74 #if !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || \ 75 !defined(GLOB_HAS_GL_MATCHC) || !defined(GLOB_HAS_GL_STATV) || \ 76 !defined(HAVE_DECL_GLOB_NOMATCH) || HAVE_DECL_GLOB_NOMATCH == 0 || \ 77 defined(BROKEN_GLOB) 78 79 #include "charclass.h" 80 81 #define DOLLAR '$' 82 #define DOT '.' 83 #define EOS '\0' 84 #define LBRACKET '[' 85 #define NOT '!' 86 #define QUESTION '?' 87 #define QUOTE '\\' 88 #define RANGE '-' 89 #define RBRACKET ']' 90 #define SEP '/' 91 #define STAR '*' 92 #define TILDE '~' 93 #define UNDERSCORE '_' 94 #define LBRACE '{' 95 #define RBRACE '}' 96 #define SLASH '/' 97 #define COMMA ',' 98 99 #ifndef DEBUG 100 101 #define M_QUOTE 0x8000 102 #define M_PROTECT 0x4000 103 #define M_MASK 0xffff 104 #define M_ASCII 0x00ff 105 106 typedef u_short Char; 107 108 #else 109 110 #define M_QUOTE 0x80 111 #define M_PROTECT 0x40 112 #define M_MASK 0xff 113 #define M_ASCII 0x7f 114 115 typedef char Char; 116 117 #endif 118 119 120 #define CHAR(c) ((Char)((c)&M_ASCII)) 121 #define META(c) ((Char)((c)|M_QUOTE)) 122 #define M_ALL META('*') 123 #define M_END META(']') 124 #define M_NOT META('!') 125 #define M_ONE META('?') 126 #define M_RNG META('-') 127 #define M_SET META('[') 128 #define M_CLASS META(':') 129 #define ismeta(c) (((c)&M_QUOTE) != 0) 130 131 #define GLOB_LIMIT_MALLOC 65536 132 #define GLOB_LIMIT_STAT 128 133 #define GLOB_LIMIT_READDIR 16384 134 135 struct glob_lim { 136 size_t glim_malloc; 137 size_t glim_stat; 138 size_t glim_readdir; 139 }; 140 141 static int compare(const void *, const void *); 142 static int g_Ctoc(const Char *, char *, u_int); 143 static int g_lstat(Char *, struct stat *, glob_t *); 144 static DIR *g_opendir(Char *, glob_t *); 145 static Char *g_strchr(const Char *, int); 146 static int g_strncmp(const Char *, const char *, size_t); 147 static int g_stat(Char *, struct stat *, glob_t *); 148 static int glob0(const Char *, glob_t *, struct glob_lim *); 149 static int glob1(Char *, Char *, glob_t *, struct glob_lim *); 150 static int glob2(Char *, Char *, Char *, Char *, Char *, Char *, 151 glob_t *, struct glob_lim *); 152 static int glob3(Char *, Char *, Char *, Char *, Char *, 153 Char *, Char *, glob_t *, struct glob_lim *); 154 static int globextend(const Char *, glob_t *, struct glob_lim *, 155 struct stat *); 156 static const Char * 157 globtilde(const Char *, Char *, size_t, glob_t *); 158 static int globexp1(const Char *, glob_t *, struct glob_lim *); 159 static int globexp2(const Char *, const Char *, glob_t *, 160 struct glob_lim *); 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]; 173 struct glob_lim limit = { 0, 0, 0 }; 174 175 patnext = (u_char *) pattern; 176 if (!(flags & GLOB_APPEND)) { 177 pglob->gl_pathc = 0; 178 pglob->gl_pathv = NULL; 179 pglob->gl_statv = 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 if (pglob->gl_offs < 0 || pglob->gl_pathc < 0 || 188 pglob->gl_offs >= INT_MAX || pglob->gl_pathc >= INT_MAX || 189 pglob->gl_pathc >= INT_MAX - pglob->gl_offs - 1) 190 return GLOB_NOSPACE; 191 192 bufnext = patbuf; 193 bufend = bufnext + MAXPATHLEN - 1; 194 if (flags & GLOB_NOESCAPE) 195 while (bufnext < bufend && (c = *patnext++) != EOS) 196 *bufnext++ = c; 197 else { 198 /* Protect the quoted characters. */ 199 while (bufnext < bufend && (c = *patnext++) != EOS) 200 if (c == QUOTE) { 201 if ((c = *patnext++) == EOS) { 202 c = QUOTE; 203 --patnext; 204 } 205 *bufnext++ = c | M_PROTECT; 206 } else 207 *bufnext++ = c; 208 } 209 *bufnext = EOS; 210 211 if (flags & GLOB_BRACE) 212 return globexp1(patbuf, pglob, &limit); 213 else 214 return glob0(patbuf, pglob, &limit); 215 } 216 217 /* 218 * Expand recursively a glob {} pattern. When there is no more expansion 219 * invoke the standard globbing routine to glob the rest of the magic 220 * characters 221 */ 222 static int 223 globexp1(const Char *pattern, glob_t *pglob, struct glob_lim *limitp) 224 { 225 const Char* ptr = pattern; 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, limitp); 230 231 if ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL) 232 return globexp2(ptr, pattern, pglob, limitp); 233 234 return glob0(pattern, pglob, limitp); 235 } 236 237 238 /* 239 * Recursive brace globbing helper. Tries to expand a single brace. 240 * If it succeeds then it invokes globexp1 with the new pattern. 241 * If it fails then it tries to glob the rest of the pattern and returns. 242 */ 243 static int 244 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, 245 struct glob_lim *limitp) 246 { 247 int i, rv; 248 Char *lm, *ls; 249 const Char *pe, *pm, *pl; 250 Char patbuf[MAXPATHLEN]; 251 252 /* copy part up to the brace */ 253 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 254 ; 255 *lm = EOS; 256 ls = lm; 257 258 /* Find the balanced brace */ 259 for (i = 0, pe = ++ptr; *pe; pe++) 260 if (*pe == LBRACKET) { 261 /* Ignore everything between [] */ 262 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 263 ; 264 if (*pe == EOS) { 265 /* 266 * We could not find a matching RBRACKET. 267 * Ignore and just look for RBRACE 268 */ 269 pe = pm; 270 } 271 } else if (*pe == LBRACE) 272 i++; 273 else if (*pe == RBRACE) { 274 if (i == 0) 275 break; 276 i--; 277 } 278 279 /* Non matching braces; just glob the pattern */ 280 if (i != 0 || *pe == EOS) 281 return glob0(patbuf, pglob, limitp); 282 283 for (i = 0, pl = pm = ptr; pm <= pe; pm++) { 284 switch (*pm) { 285 case LBRACKET: 286 /* Ignore everything between [] */ 287 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++) 288 ; 289 if (*pm == EOS) { 290 /* 291 * We could not find a matching RBRACKET. 292 * Ignore and just look for RBRACE 293 */ 294 pm = pl; 295 } 296 break; 297 298 case LBRACE: 299 i++; 300 break; 301 302 case RBRACE: 303 if (i) { 304 i--; 305 break; 306 } 307 /* FALLTHROUGH */ 308 case COMMA: 309 if (i && *pm == COMMA) 310 break; 311 else { 312 /* Append the current string */ 313 for (lm = ls; (pl < pm); *lm++ = *pl++) 314 ; 315 316 /* 317 * Append the rest of the pattern after the 318 * closing brace 319 */ 320 for (pl = pe + 1; (*lm++ = *pl++) != EOS; ) 321 ; 322 323 /* Expand the current pattern */ 324 #ifdef DEBUG 325 qprintf("globexp2:", patbuf); 326 #endif 327 rv = globexp1(patbuf, pglob, limitp); 328 if (rv && rv != GLOB_NOMATCH) 329 return rv; 330 331 /* move after the comma, to the next string */ 332 pl = pm + 1; 333 } 334 break; 335 336 default: 337 break; 338 } 339 } 340 return 0; 341 } 342 343 344 345 /* 346 * expand tilde from the passwd file. 347 */ 348 static const Char * 349 globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob) 350 { 351 struct passwd *pwd; 352 char *h; 353 const Char *p; 354 Char *b, *eb; 355 356 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 357 return pattern; 358 359 /* Copy up to the end of the string or / */ 360 eb = &patbuf[patbuf_len - 1]; 361 for (p = pattern + 1, h = (char *) patbuf; 362 h < (char *)eb && *p && *p != SLASH; *h++ = *p++) 363 ; 364 365 *h = EOS; 366 367 #if 0 368 if (h == (char *)eb) 369 return what; 370 #endif 371 372 if (((char *) patbuf)[0] == EOS) { 373 /* 374 * handle a plain ~ or ~/ by expanding $HOME 375 * first and then trying the password file 376 */ 377 #if 0 378 if (issetugid() != 0 || (h = getenv("HOME")) == NULL) { 379 #endif 380 if ((getuid() != geteuid()) || (h = getenv("HOME")) == NULL) { 381 if ((pwd = getpwuid(getuid())) == NULL) 382 return pattern; 383 else 384 h = pwd->pw_dir; 385 } 386 } else { 387 /* 388 * Expand a ~user 389 */ 390 if ((pwd = getpwnam((char*) patbuf)) == NULL) 391 return pattern; 392 else 393 h = pwd->pw_dir; 394 } 395 396 /* Copy the home directory */ 397 for (b = patbuf; b < eb && *h; *b++ = *h++) 398 ; 399 400 /* Append the rest of the pattern */ 401 while (b < eb && (*b++ = *p++) != EOS) 402 ; 403 *b = EOS; 404 405 return patbuf; 406 } 407 408 static int 409 g_strncmp(const Char *s1, const char *s2, size_t n) 410 { 411 int rv = 0; 412 413 while (n--) { 414 rv = *(Char *)s1 - *(const unsigned char *)s2++; 415 if (rv) 416 break; 417 if (*s1++ == '\0') 418 break; 419 } 420 return rv; 421 } 422 423 static int 424 g_charclass(const Char **patternp, Char **bufnextp) 425 { 426 const Char *pattern = *patternp + 1; 427 Char *bufnext = *bufnextp; 428 const Char *colon; 429 struct cclass *cc; 430 size_t len; 431 432 if ((colon = g_strchr(pattern, ':')) == NULL || colon[1] != ']') 433 return 1; /* not a character class */ 434 435 len = (size_t)(colon - pattern); 436 for (cc = cclasses; cc->name != NULL; cc++) { 437 if (!g_strncmp(pattern, cc->name, len) && cc->name[len] == '\0') 438 break; 439 } 440 if (cc->name == NULL) 441 return -1; /* invalid character class */ 442 *bufnext++ = M_CLASS; 443 *bufnext++ = (Char)(cc - &cclasses[0]); 444 *bufnextp = bufnext; 445 *patternp += len + 3; 446 447 return 0; 448 } 449 450 /* 451 * The main glob() routine: compiles the pattern (optionally processing 452 * quotes), calls glob1() to do the real pattern matching, and finally 453 * sorts the list (unless unsorted operation is requested). Returns 0 454 * if things went well, nonzero if errors occurred. It is not an error 455 * to find no matches. 456 */ 457 static int 458 glob0(const Char *pattern, glob_t *pglob, struct glob_lim *limitp) 459 { 460 const Char *qpatnext; 461 int c, err, oldpathc; 462 Char *bufnext, patbuf[MAXPATHLEN]; 463 464 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 465 oldpathc = pglob->gl_pathc; 466 bufnext = patbuf; 467 468 /* We don't need to check for buffer overflow any more. */ 469 while ((c = *qpatnext++) != EOS) { 470 switch (c) { 471 case LBRACKET: 472 c = *qpatnext; 473 if (c == NOT) 474 ++qpatnext; 475 if (*qpatnext == EOS || 476 g_strchr(qpatnext+1, RBRACKET) == NULL) { 477 *bufnext++ = LBRACKET; 478 if (c == NOT) 479 --qpatnext; 480 break; 481 } 482 *bufnext++ = M_SET; 483 if (c == NOT) 484 *bufnext++ = M_NOT; 485 c = *qpatnext++; 486 do { 487 if (c == LBRACKET && *qpatnext == ':') { 488 do { 489 err = g_charclass(&qpatnext, 490 &bufnext); 491 if (err) 492 break; 493 c = *qpatnext++; 494 } while (c == LBRACKET && *qpatnext == ':'); 495 if (err == -1 && 496 !(pglob->gl_flags & GLOB_NOCHECK)) 497 return GLOB_NOMATCH; 498 if (c == RBRACKET) 499 break; 500 } 501 *bufnext++ = CHAR(c); 502 if (*qpatnext == RANGE && 503 (c = qpatnext[1]) != RBRACKET) { 504 *bufnext++ = M_RNG; 505 *bufnext++ = CHAR(c); 506 qpatnext += 2; 507 } 508 } while ((c = *qpatnext++) != RBRACKET); 509 pglob->gl_flags |= GLOB_MAGCHAR; 510 *bufnext++ = M_END; 511 break; 512 case QUESTION: 513 pglob->gl_flags |= GLOB_MAGCHAR; 514 *bufnext++ = M_ONE; 515 break; 516 case STAR: 517 pglob->gl_flags |= GLOB_MAGCHAR; 518 /* collapse adjacent stars to one, 519 * to avoid exponential behavior 520 */ 521 if (bufnext == patbuf || bufnext[-1] != M_ALL) 522 *bufnext++ = M_ALL; 523 break; 524 default: 525 *bufnext++ = CHAR(c); 526 break; 527 } 528 } 529 *bufnext = EOS; 530 #ifdef DEBUG 531 qprintf("glob0:", patbuf); 532 #endif 533 534 if ((err = glob1(patbuf, patbuf+MAXPATHLEN-1, pglob, limitp)) != 0) 535 return(err); 536 537 /* 538 * If there was no match we are going to append the pattern 539 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 540 * and the pattern did not contain any magic characters 541 * GLOB_NOMAGIC is there just for compatibility with csh. 542 */ 543 if (pglob->gl_pathc == oldpathc) { 544 if ((pglob->gl_flags & GLOB_NOCHECK) || 545 ((pglob->gl_flags & GLOB_NOMAGIC) && 546 !(pglob->gl_flags & GLOB_MAGCHAR))) 547 return(globextend(pattern, pglob, limitp, NULL)); 548 else 549 return(GLOB_NOMATCH); 550 } 551 if (!(pglob->gl_flags & GLOB_NOSORT)) 552 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 553 pglob->gl_pathc - oldpathc, sizeof(char *), compare); 554 return(0); 555 } 556 557 static int 558 compare(const void *p, const void *q) 559 { 560 return(strcmp(*(char **)p, *(char **)q)); 561 } 562 563 static int 564 glob1(Char *pattern, Char *pattern_last, glob_t *pglob, struct glob_lim *limitp) 565 { 566 Char pathbuf[MAXPATHLEN]; 567 568 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 569 if (*pattern == EOS) 570 return(0); 571 return(glob2(pathbuf, pathbuf+MAXPATHLEN-1, 572 pathbuf, pathbuf+MAXPATHLEN-1, 573 pattern, pattern_last, pglob, limitp)); 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 *pathbuf_last, Char *pathend, Char *pathend_last, 583 Char *pattern, Char *pattern_last, glob_t *pglob, struct glob_lim *limitp) 584 { 585 struct stat sb; 586 Char *p, *q; 587 int anymeta; 588 589 /* 590 * Loop over pattern segments until end of pattern or until 591 * segment with meta character found. 592 */ 593 for (anymeta = 0;;) { 594 if (*pattern == EOS) { /* End of pattern? */ 595 *pathend = EOS; 596 if (g_lstat(pathbuf, &sb, pglob)) 597 return(0); 598 599 if ((pglob->gl_flags & GLOB_LIMIT) && 600 limitp->glim_stat++ >= GLOB_LIMIT_STAT) { 601 errno = 0; 602 *pathend++ = SEP; 603 *pathend = EOS; 604 return(GLOB_NOSPACE); 605 } 606 607 if (((pglob->gl_flags & GLOB_MARK) && 608 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) || 609 (S_ISLNK(sb.st_mode) && 610 (g_stat(pathbuf, &sb, pglob) == 0) && 611 S_ISDIR(sb.st_mode)))) { 612 if (pathend+1 > pathend_last) 613 return (1); 614 *pathend++ = SEP; 615 *pathend = EOS; 616 } 617 ++pglob->gl_matchc; 618 return(globextend(pathbuf, pglob, limitp, &sb)); 619 } 620 621 /* Find end of next segment, copy tentatively to pathend. */ 622 q = pathend; 623 p = pattern; 624 while (*p != EOS && *p != SEP) { 625 if (ismeta(*p)) 626 anymeta = 1; 627 if (q+1 > pathend_last) 628 return (1); 629 *q++ = *p++; 630 } 631 632 if (!anymeta) { /* No expansion, do next segment. */ 633 pathend = q; 634 pattern = p; 635 while (*pattern == SEP) { 636 if (pathend+1 > pathend_last) 637 return (1); 638 *pathend++ = *pattern++; 639 } 640 } else 641 /* Need expansion, recurse. */ 642 return(glob3(pathbuf, pathbuf_last, pathend, 643 pathend_last, pattern, p, pattern_last, 644 pglob, limitp)); 645 } 646 /* NOTREACHED */ 647 } 648 649 static int 650 glob3(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last, 651 Char *pattern, Char *restpattern, Char *restpattern_last, glob_t *pglob, 652 struct glob_lim *limitp) 653 { 654 struct dirent *dp; 655 DIR *dirp; 656 int err; 657 char buf[MAXPATHLEN]; 658 659 /* 660 * The readdirfunc declaration can't be prototyped, because it is 661 * assigned, below, to two functions which are prototyped in glob.h 662 * and dirent.h as taking pointers to differently typed opaque 663 * structures. 664 */ 665 struct dirent *(*readdirfunc)(void *); 666 667 if (pathend > pathend_last) 668 return (1); 669 *pathend = EOS; 670 errno = 0; 671 672 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 673 /* TODO: don't call for ENOENT or ENOTDIR? */ 674 if (pglob->gl_errfunc) { 675 if (g_Ctoc(pathbuf, buf, sizeof(buf))) 676 return(GLOB_ABORTED); 677 if (pglob->gl_errfunc(buf, errno) || 678 pglob->gl_flags & GLOB_ERR) 679 return(GLOB_ABORTED); 680 } 681 return(0); 682 } 683 684 err = 0; 685 686 /* Search directory for matching names. */ 687 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 688 readdirfunc = pglob->gl_readdir; 689 else 690 readdirfunc = (struct dirent *(*)(void *))readdir; 691 while ((dp = (*readdirfunc)(dirp))) { 692 u_char *sc; 693 Char *dc; 694 695 if ((pglob->gl_flags & GLOB_LIMIT) && 696 limitp->glim_readdir++ >= GLOB_LIMIT_READDIR) { 697 errno = 0; 698 *pathend++ = SEP; 699 *pathend = EOS; 700 return(GLOB_NOSPACE); 701 } 702 703 /* Initial DOT must be matched literally. */ 704 if (dp->d_name[0] == DOT && *pattern != DOT) 705 continue; 706 dc = pathend; 707 sc = (u_char *) dp->d_name; 708 while (dc < pathend_last && (*dc++ = *sc++) != EOS) 709 ; 710 if (dc >= pathend_last) { 711 *dc = EOS; 712 err = 1; 713 break; 714 } 715 716 if (!match(pathend, pattern, restpattern)) { 717 *pathend = EOS; 718 continue; 719 } 720 err = glob2(pathbuf, pathbuf_last, --dc, pathend_last, 721 restpattern, restpattern_last, pglob, limitp); 722 if (err) 723 break; 724 } 725 726 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 727 (*pglob->gl_closedir)(dirp); 728 else 729 closedir(dirp); 730 return(err); 731 } 732 733 734 /* 735 * Extend the gl_pathv member of a glob_t structure to accommodate a new item, 736 * add the new item, and update gl_pathc. 737 * 738 * This assumes the BSD realloc, which only copies the block when its size 739 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 740 * behavior. 741 * 742 * Return 0 if new item added, error code if memory couldn't be allocated. 743 * 744 * Invariant of the glob_t structure: 745 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 746 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 747 */ 748 static int 749 globextend(const Char *path, glob_t *pglob, struct glob_lim *limitp, 750 struct stat *sb) 751 { 752 char **pathv; 753 ssize_t i; 754 size_t newn, len; 755 char *copy = NULL; 756 const Char *p; 757 struct stat **statv; 758 759 newn = 2 + pglob->gl_pathc + pglob->gl_offs; 760 if (pglob->gl_offs >= INT_MAX || 761 pglob->gl_pathc >= INT_MAX || 762 newn >= INT_MAX || 763 SIZE_MAX / sizeof(*pathv) <= newn || 764 SIZE_MAX / sizeof(*statv) <= newn) { 765 nospace: 766 for (i = pglob->gl_offs; i < (ssize_t)(newn - 2); i++) { 767 if (pglob->gl_pathv && pglob->gl_pathv[i]) 768 free(pglob->gl_pathv[i]); 769 if ((pglob->gl_flags & GLOB_KEEPSTAT) != 0 && 770 pglob->gl_pathv && pglob->gl_pathv[i]) 771 free(pglob->gl_statv[i]); 772 } 773 if (pglob->gl_pathv) { 774 free(pglob->gl_pathv); 775 pglob->gl_pathv = NULL; 776 } 777 if (pglob->gl_statv) { 778 free(pglob->gl_statv); 779 pglob->gl_statv = NULL; 780 } 781 return(GLOB_NOSPACE); 782 } 783 784 pathv = realloc(pglob->gl_pathv, newn * sizeof(*pathv)); 785 if (pathv == NULL) 786 goto nospace; 787 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 788 /* first time around -- clear initial gl_offs items */ 789 pathv += pglob->gl_offs; 790 for (i = pglob->gl_offs; --i >= 0; ) 791 *--pathv = NULL; 792 } 793 pglob->gl_pathv = pathv; 794 795 if ((pglob->gl_flags & GLOB_KEEPSTAT) != 0) { 796 statv = realloc(pglob->gl_statv, newn * sizeof(*statv)); 797 if (statv == NULL) 798 goto nospace; 799 if (pglob->gl_statv == NULL && pglob->gl_offs > 0) { 800 /* first time around -- clear initial gl_offs items */ 801 statv += pglob->gl_offs; 802 for (i = pglob->gl_offs; --i >= 0; ) 803 *--statv = NULL; 804 } 805 pglob->gl_statv = statv; 806 if (sb == NULL) 807 statv[pglob->gl_offs + pglob->gl_pathc] = NULL; 808 else { 809 limitp->glim_malloc += sizeof(**statv); 810 if ((pglob->gl_flags & GLOB_LIMIT) && 811 limitp->glim_malloc >= GLOB_LIMIT_MALLOC) { 812 errno = 0; 813 return(GLOB_NOSPACE); 814 } 815 if ((statv[pglob->gl_offs + pglob->gl_pathc] = 816 malloc(sizeof(**statv))) == NULL) 817 goto copy_error; 818 memcpy(statv[pglob->gl_offs + pglob->gl_pathc], sb, 819 sizeof(*sb)); 820 } 821 statv[pglob->gl_offs + pglob->gl_pathc + 1] = NULL; 822 } 823 824 for (p = path; *p++;) 825 ; 826 len = (size_t)(p - path); 827 limitp->glim_malloc += len; 828 if ((copy = malloc(len)) != NULL) { 829 if (g_Ctoc(path, copy, len)) { 830 free(copy); 831 return(GLOB_NOSPACE); 832 } 833 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 834 } 835 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 836 837 if ((pglob->gl_flags & GLOB_LIMIT) && 838 (newn * sizeof(*pathv)) + limitp->glim_malloc > 839 GLOB_LIMIT_MALLOC) { 840 errno = 0; 841 return(GLOB_NOSPACE); 842 } 843 copy_error: 844 return(copy == NULL ? GLOB_NOSPACE : 0); 845 } 846 847 848 /* 849 * pattern matching function for filenames. Each occurrence of the * 850 * pattern causes a recursion level. 851 */ 852 static int 853 match(Char *name, Char *pat, Char *patend) 854 { 855 int ok, negate_range; 856 Char c, k; 857 858 while (pat < patend) { 859 c = *pat++; 860 switch (c & M_MASK) { 861 case M_ALL: 862 if (pat == patend) 863 return(1); 864 do { 865 if (match(name, pat, patend)) 866 return(1); 867 } while (*name++ != EOS); 868 return(0); 869 case M_ONE: 870 if (*name++ == EOS) 871 return(0); 872 break; 873 case M_SET: 874 ok = 0; 875 if ((k = *name++) == EOS) 876 return(0); 877 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS) 878 ++pat; 879 while (((c = *pat++) & M_MASK) != M_END) { 880 if ((c & M_MASK) == M_CLASS) { 881 Char idx = *pat & M_MASK; 882 if (idx < NCCLASSES && 883 cclasses[idx].isctype(k)) 884 ok = 1; 885 ++pat; 886 } 887 if ((*pat & M_MASK) == M_RNG) { 888 if (c <= k && k <= pat[1]) 889 ok = 1; 890 pat += 2; 891 } else if (c == k) 892 ok = 1; 893 } 894 if (ok == negate_range) 895 return(0); 896 break; 897 default: 898 if (*name++ != c) 899 return(0); 900 break; 901 } 902 } 903 return(*name == EOS); 904 } 905 906 /* Free allocated data belonging to a glob_t structure. */ 907 void 908 globfree(glob_t *pglob) 909 { 910 int i; 911 char **pp; 912 913 if (pglob->gl_pathv != NULL) { 914 pp = pglob->gl_pathv + pglob->gl_offs; 915 for (i = pglob->gl_pathc; i--; ++pp) 916 if (*pp) 917 free(*pp); 918 free(pglob->gl_pathv); 919 pglob->gl_pathv = NULL; 920 } 921 if (pglob->gl_statv != NULL) { 922 for (i = 0; i < pglob->gl_pathc; i++) { 923 if (pglob->gl_statv[i] != NULL) 924 free(pglob->gl_statv[i]); 925 } 926 free(pglob->gl_statv); 927 pglob->gl_statv = NULL; 928 } 929 } 930 931 static DIR * 932 g_opendir(Char *str, glob_t *pglob) 933 { 934 char buf[MAXPATHLEN]; 935 936 if (!*str) 937 strlcpy(buf, ".", sizeof buf); 938 else { 939 if (g_Ctoc(str, buf, sizeof(buf))) 940 return(NULL); 941 } 942 943 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 944 return((*pglob->gl_opendir)(buf)); 945 946 return(opendir(buf)); 947 } 948 949 static int 950 g_lstat(Char *fn, struct stat *sb, glob_t *pglob) 951 { 952 char buf[MAXPATHLEN]; 953 954 if (g_Ctoc(fn, buf, sizeof(buf))) 955 return(-1); 956 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 957 return((*pglob->gl_lstat)(buf, sb)); 958 return(lstat(buf, sb)); 959 } 960 961 static int 962 g_stat(Char *fn, struct stat *sb, glob_t *pglob) 963 { 964 char buf[MAXPATHLEN]; 965 966 if (g_Ctoc(fn, buf, sizeof(buf))) 967 return(-1); 968 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 969 return((*pglob->gl_stat)(buf, sb)); 970 return(stat(buf, sb)); 971 } 972 973 static Char * 974 g_strchr(const Char *str, int ch) 975 { 976 do { 977 if (*str == ch) 978 return ((Char *)str); 979 } while (*str++); 980 return (NULL); 981 } 982 983 static int 984 g_Ctoc(const Char *str, char *buf, u_int len) 985 { 986 987 while (len--) { 988 if ((*buf++ = *str++) == EOS) 989 return (0); 990 } 991 return (1); 992 } 993 994 #ifdef DEBUG 995 static void 996 qprintf(const char *str, Char *s) 997 { 998 Char *p; 999 1000 (void)printf("%s:\n", str); 1001 for (p = s; *p; p++) 1002 (void)printf("%c", CHAR(*p)); 1003 (void)printf("\n"); 1004 for (p = s; *p; p++) 1005 (void)printf("%c", *p & M_PROTECT ? '"' : ' '); 1006 (void)printf("\n"); 1007 for (p = s; *p; p++) 1008 (void)printf("%c", ismeta(*p) ? '_' : ' '); 1009 (void)printf("\n"); 1010 } 1011 #endif 1012 1013 #endif /* !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || 1014 !defined(GLOB_HAS_GL_MATCHC) || !defined(GLOB_HAS_GL_STATV) */ 1015
