1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Guido van Rossum. 7 * 8 * Copyright (c) 2011 The FreeBSD Foundation 9 * All rights reserved. 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * From: @(#)glob.c 8.3 (Berkeley) 10/13/93 38 * From: FreeBSD: head/lib/libc/gen/glob.c 317913 2017-05-07 19:52:56Z jilles 39 */ 40 41 #include <sys/cdefs.h> 42 #include <sys/param.h> 43 #define _WANT_FREEBSD11_STAT 44 #include <sys/stat.h> 45 46 #include <ctype.h> 47 #define _WANT_FREEBSD11_DIRENT 48 #include <dirent.h> 49 #include <errno.h> 50 #include <glob.h> 51 #include <limits.h> 52 #include <pwd.h> 53 #include <stdint.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <wchar.h> 59 60 #include "collate.h" 61 #include "gen-compat.h" 62 #include "glob-compat11.h" 63 64 /* 65 * glob(3) expansion limits. Stop the expansion if any of these limits 66 * is reached. This caps the runtime in the face of DoS attacks. See 67 * also CVE-2010-2632 68 */ 69 #define GLOB_LIMIT_BRACE 128 /* number of brace calls */ 70 #define GLOB_LIMIT_PATH 65536 /* number of path elements */ 71 #define GLOB_LIMIT_READDIR 16384 /* number of readdirs */ 72 #define GLOB_LIMIT_STAT 1024 /* number of stat system calls */ 73 #define GLOB_LIMIT_STRING ARG_MAX /* maximum total size for paths */ 74 75 struct glob_limit { 76 size_t l_brace_cnt; 77 size_t l_path_lim; 78 size_t l_readdir_cnt; 79 size_t l_stat_cnt; 80 size_t l_string_cnt; 81 }; 82 83 #define DOT L'.' 84 #define EOS L'\0' 85 #define LBRACKET L'[' 86 #define NOT L'!' 87 #define QUESTION L'?' 88 #define QUOTE L'\\' 89 #define RANGE L'-' 90 #define RBRACKET L']' 91 #define SEP L'/' 92 #define STAR L'*' 93 #define TILDE L'~' 94 #define LBRACE L'{' 95 #define RBRACE L'}' 96 #define COMMA L',' 97 98 #define M_QUOTE 0x8000000000ULL 99 #define M_PROTECT 0x4000000000ULL 100 #define M_MASK 0xffffffffffULL 101 #define M_CHAR 0x00ffffffffULL 102 103 typedef uint_fast64_t Char; 104 105 #define CHAR(c) ((Char)((c)&M_CHAR)) 106 #define META(c) ((Char)((c)|M_QUOTE)) 107 #define UNPROT(c) ((c) & ~M_PROTECT) 108 #define M_ALL META(L'*') 109 #define M_END META(L']') 110 #define M_NOT META(L'!') 111 #define M_ONE META(L'?') 112 #define M_RNG META(L'-') 113 #define M_SET META(L'[') 114 #define ismeta(c) (((c)&M_QUOTE) != 0) 115 #ifdef DEBUG 116 #define isprot(c) (((c)&M_PROTECT) != 0) 117 #endif 118 119 static int compare(const void *, const void *); 120 static int g_Ctoc(const Char *, char *, size_t); 121 static int g_lstat(Char *, struct freebsd11_stat *, glob11_t *); 122 static DIR *g_opendir(Char *, glob11_t *); 123 static const Char *g_strchr(const Char *, wchar_t); 124 #ifdef notdef 125 static Char *g_strcat(Char *, const Char *); 126 #endif 127 static int g_stat(Char *, struct freebsd11_stat *, glob11_t *); 128 static int glob0(const Char *, glob11_t *, struct glob_limit *, 129 const char *); 130 static int glob1(Char *, glob11_t *, struct glob_limit *); 131 static int glob2(Char *, Char *, Char *, Char *, glob11_t *, 132 struct glob_limit *); 133 static int glob3(Char *, Char *, Char *, Char *, Char *, glob11_t *, 134 struct glob_limit *); 135 static int globextend(const Char *, glob11_t *, struct glob_limit *, 136 const char *); 137 static const Char * 138 globtilde(const Char *, Char *, size_t, glob11_t *); 139 static int globexp0(const Char *, glob11_t *, struct glob_limit *, 140 const char *); 141 static int globexp1(const Char *, glob11_t *, struct glob_limit *); 142 static int globexp2(const Char *, const Char *, glob11_t *, 143 struct glob_limit *); 144 static int globfinal(glob11_t *, struct glob_limit *, size_t, 145 const char *); 146 static int match(Char *, Char *, Char *); 147 static int err_nomatch(glob11_t *, struct glob_limit *, const char *); 148 static int err_aborted(glob11_t *, int, char *); 149 #ifdef DEBUG 150 static void qprintf(const char *, Char *); 151 #endif 152 153 int 154 freebsd11_glob(const char * __restrict pattern, int flags, 155 int (*errfunc)(const char *, int), glob11_t * __restrict pglob) 156 { 157 struct glob_limit limit = { 0, 0, 0, 0, 0 }; 158 const char *patnext; 159 Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot; 160 mbstate_t mbs; 161 wchar_t wc; 162 size_t clen; 163 int too_long; 164 165 patnext = pattern; 166 if (!(flags & GLOB_APPEND)) { 167 pglob->gl_pathc = 0; 168 pglob->gl_pathv = NULL; 169 if (!(flags & GLOB_DOOFFS)) 170 pglob->gl_offs = 0; 171 } 172 if (flags & GLOB_LIMIT) { 173 limit.l_path_lim = pglob->gl_matchc; 174 if (limit.l_path_lim == 0) 175 limit.l_path_lim = GLOB_LIMIT_PATH; 176 } 177 pglob->gl_flags = flags & ~GLOB_MAGCHAR; 178 pglob->gl_errfunc = errfunc; 179 pglob->gl_matchc = 0; 180 181 bufnext = patbuf; 182 bufend = bufnext + MAXPATHLEN - 1; 183 too_long = 1; 184 if (flags & GLOB_NOESCAPE) { 185 memset(&mbs, 0, sizeof(mbs)); 186 while (bufnext <= bufend) { 187 clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); 188 if (clen == (size_t)-1 || clen == (size_t)-2) 189 return (err_nomatch(pglob, &limit, pattern)); 190 else if (clen == 0) { 191 too_long = 0; 192 break; 193 } 194 *bufnext++ = wc; 195 patnext += clen; 196 } 197 } else { 198 /* Protect the quoted characters. */ 199 memset(&mbs, 0, sizeof(mbs)); 200 while (bufnext <= bufend) { 201 if (*patnext == '\\') { 202 if (*++patnext == '\0') { 203 *bufnext++ = QUOTE; 204 continue; 205 } 206 prot = M_PROTECT; 207 } else 208 prot = 0; 209 clen = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs); 210 if (clen == (size_t)-1 || clen == (size_t)-2) 211 return (err_nomatch(pglob, &limit, pattern)); 212 else if (clen == 0) { 213 too_long = 0; 214 break; 215 } 216 *bufnext++ = wc | prot; 217 patnext += clen; 218 } 219 } 220 if (too_long) 221 return (err_nomatch(pglob, &limit, pattern)); 222 *bufnext = EOS; 223 224 if (flags & GLOB_BRACE) 225 return (globexp0(patbuf, pglob, &limit, pattern)); 226 else 227 return (glob0(patbuf, pglob, &limit, pattern)); 228 } 229 230 static int 231 globexp0(const Char *pattern, glob11_t *pglob, struct glob_limit *limit, 232 const char *origpat) { 233 int rv; 234 size_t oldpathc; 235 236 /* Protect a single {}, for find(1), like csh */ 237 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS) { 238 if ((pglob->gl_flags & GLOB_LIMIT) && 239 limit->l_brace_cnt++ >= GLOB_LIMIT_BRACE) { 240 errno = E2BIG; 241 return (GLOB_NOSPACE); 242 } 243 return (glob0(pattern, pglob, limit, origpat)); 244 } 245 246 oldpathc = pglob->gl_pathc; 247 248 if ((rv = globexp1(pattern, pglob, limit)) != 0) 249 return rv; 250 251 return (globfinal(pglob, limit, oldpathc, origpat)); 252 } 253 254 /* 255 * Expand recursively a glob {} pattern. When there is no more expansion 256 * invoke the standard globbing routine to glob the rest of the magic 257 * characters 258 */ 259 static int 260 globexp1(const Char *pattern, glob11_t *pglob, struct glob_limit *limit) 261 { 262 const Char* ptr; 263 264 if ((ptr = g_strchr(pattern, LBRACE)) != NULL) { 265 if ((pglob->gl_flags & GLOB_LIMIT) && 266 limit->l_brace_cnt++ >= GLOB_LIMIT_BRACE) { 267 errno = E2BIG; 268 return (GLOB_NOSPACE); 269 } 270 return (globexp2(ptr, pattern, pglob, limit)); 271 } 272 273 return (glob0(pattern, pglob, limit, NULL)); 274 } 275 276 277 /* 278 * Recursive brace globbing helper. Tries to expand a single brace. 279 * If it succeeds then it invokes globexp1 with the new pattern. 280 * If it fails then it tries to glob the rest of the pattern and returns. 281 */ 282 static int 283 globexp2(const Char *ptr, const Char *pattern, glob11_t *pglob, 284 struct glob_limit *limit) 285 { 286 int i, rv; 287 Char *lm, *ls; 288 const Char *pe, *pm, *pm1, *pl; 289 Char patbuf[MAXPATHLEN]; 290 291 /* copy part up to the brace */ 292 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++) 293 continue; 294 *lm = EOS; 295 ls = lm; 296 297 /* Find the balanced brace */ 298 for (i = 0, pe = ++ptr; *pe != EOS; pe++) 299 if (*pe == LBRACKET) { 300 /* Ignore everything between [] */ 301 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++) 302 continue; 303 if (*pe == EOS) { 304 /* 305 * We could not find a matching RBRACKET. 306 * Ignore and just look for RBRACE 307 */ 308 pe = pm; 309 } 310 } 311 else if (*pe == LBRACE) 312 i++; 313 else if (*pe == RBRACE) { 314 if (i == 0) 315 break; 316 i--; 317 } 318 319 /* Non matching braces; just glob the pattern */ 320 if (i != 0 || *pe == EOS) 321 return (glob0(pattern, pglob, limit, NULL)); 322 323 for (i = 0, pl = pm = ptr; pm <= pe; pm++) 324 switch (*pm) { 325 case LBRACKET: 326 /* Ignore everything between [] */ 327 for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++) 328 continue; 329 if (*pm == EOS) { 330 /* 331 * We could not find a matching RBRACKET. 332 * Ignore and just look for RBRACE 333 */ 334 pm = pm1; 335 } 336 break; 337 338 case LBRACE: 339 i++; 340 break; 341 342 case RBRACE: 343 if (i) { 344 i--; 345 break; 346 } 347 /* FALLTHROUGH */ 348 case COMMA: 349 if (i && *pm == COMMA) 350 break; 351 else { 352 /* Append the current string */ 353 for (lm = ls; (pl < pm); *lm++ = *pl++) 354 continue; 355 /* 356 * Append the rest of the pattern after the 357 * closing brace 358 */ 359 for (pl = pe + 1; (*lm++ = *pl++) != EOS;) 360 continue; 361 362 /* Expand the current pattern */ 363 #ifdef DEBUG 364 qprintf("globexp2:", patbuf); 365 #endif 366 rv = globexp1(patbuf, pglob, limit); 367 if (rv) 368 return (rv); 369 370 /* move after the comma, to the next string */ 371 pl = pm + 1; 372 } 373 break; 374 375 default: 376 break; 377 } 378 return (0); 379 } 380 381 382 383 /* 384 * expand tilde from the passwd file. 385 */ 386 static const Char * 387 globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob11_t *pglob) 388 { 389 struct passwd *pwd; 390 char *h, *sc; 391 const Char *p; 392 Char *b, *eb; 393 wchar_t wc; 394 wchar_t wbuf[MAXPATHLEN]; 395 wchar_t *wbufend, *dc; 396 size_t clen; 397 mbstate_t mbs; 398 int too_long; 399 400 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE)) 401 return (pattern); 402 403 /* 404 * Copy up to the end of the string or / 405 */ 406 eb = &patbuf[patbuf_len - 1]; 407 for (p = pattern + 1, b = patbuf; 408 b < eb && *p != EOS && UNPROT(*p) != SEP; *b++ = *p++) 409 continue; 410 411 if (*p != EOS && UNPROT(*p) != SEP) 412 return (NULL); 413 414 *b = EOS; 415 h = NULL; 416 417 if (patbuf[0] == EOS) { 418 /* 419 * handle a plain ~ or ~/ by expanding $HOME first (iff 420 * we're not running setuid or setgid) and then trying 421 * the password file 422 */ 423 if ((h = secure_getenv("HOME")) == NULL) { 424 if (((h = getlogin()) != NULL && 425 (pwd = getpwnam(h)) != NULL) || 426 (pwd = getpwuid(getuid())) != NULL) 427 h = pwd->pw_dir; 428 else 429 return (pattern); 430 } 431 } 432 else { 433 /* 434 * Expand a ~user 435 */ 436 if (g_Ctoc(patbuf, (char *)wbuf, sizeof(wbuf))) 437 return (NULL); 438 if ((pwd = getpwnam((char *)wbuf)) == NULL) 439 return (pattern); 440 else 441 h = pwd->pw_dir; 442 } 443 444 /* Copy the home directory */ 445 dc = wbuf; 446 sc = h; 447 wbufend = wbuf + MAXPATHLEN - 1; 448 too_long = 1; 449 memset(&mbs, 0, sizeof(mbs)); 450 while (dc <= wbufend) { 451 clen = mbrtowc(&wc, sc, MB_LEN_MAX, &mbs); 452 if (clen == (size_t)-1 || clen == (size_t)-2) { 453 /* XXX See initial comment #2. */ 454 wc = (unsigned char)*sc; 455 clen = 1; 456 memset(&mbs, 0, sizeof(mbs)); 457 } 458 if ((*dc++ = wc) == EOS) { 459 too_long = 0; 460 break; 461 } 462 sc += clen; 463 } 464 if (too_long) 465 return (NULL); 466 467 dc = wbuf; 468 for (b = patbuf; b < eb && *dc != EOS; *b++ = *dc++ | M_PROTECT) 469 continue; 470 if (*dc != EOS) 471 return (NULL); 472 473 /* Append the rest of the pattern */ 474 if (*p != EOS) { 475 too_long = 1; 476 while (b <= eb) { 477 if ((*b++ = *p++) == EOS) { 478 too_long = 0; 479 break; 480 } 481 } 482 if (too_long) 483 return (NULL); 484 } else 485 *b = EOS; 486 487 return (patbuf); 488 } 489 490 491 /* 492 * The main glob() routine: compiles the pattern (optionally processing 493 * quotes), calls glob1() to do the real pattern matching, and finally 494 * sorts the list (unless unsorted operation is requested). Returns 0 495 * if things went well, nonzero if errors occurred. 496 */ 497 static int 498 glob0(const Char *pattern, glob11_t *pglob, struct glob_limit *limit, 499 const char *origpat) { 500 const Char *qpatnext; 501 int err; 502 size_t oldpathc; 503 Char *bufnext, c, patbuf[MAXPATHLEN]; 504 505 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob); 506 if (qpatnext == NULL) { 507 errno = E2BIG; 508 return (GLOB_NOSPACE); 509 } 510 oldpathc = pglob->gl_pathc; 511 bufnext = patbuf; 512 513 /* We don't need to check for buffer overflow any more. */ 514 while ((c = *qpatnext++) != EOS) { 515 switch (c) { 516 case LBRACKET: 517 c = *qpatnext; 518 if (c == NOT) 519 ++qpatnext; 520 if (*qpatnext == EOS || 521 g_strchr(qpatnext+1, RBRACKET) == NULL) { 522 *bufnext++ = LBRACKET; 523 if (c == NOT) 524 --qpatnext; 525 break; 526 } 527 *bufnext++ = M_SET; 528 if (c == NOT) 529 *bufnext++ = M_NOT; 530 c = *qpatnext++; 531 do { 532 *bufnext++ = CHAR(c); 533 if (*qpatnext == RANGE && 534 (c = qpatnext[1]) != RBRACKET) { 535 *bufnext++ = M_RNG; 536 *bufnext++ = CHAR(c); 537 qpatnext += 2; 538 } 539 } while ((c = *qpatnext++) != RBRACKET); 540 pglob->gl_flags |= GLOB_MAGCHAR; 541 *bufnext++ = M_END; 542 break; 543 case QUESTION: 544 pglob->gl_flags |= GLOB_MAGCHAR; 545 *bufnext++ = M_ONE; 546 break; 547 case STAR: 548 pglob->gl_flags |= GLOB_MAGCHAR; 549 /* collapse adjacent stars to one, 550 * to avoid exponential behavior 551 */ 552 if (bufnext == patbuf || bufnext[-1] != M_ALL) 553 *bufnext++ = M_ALL; 554 break; 555 default: 556 *bufnext++ = CHAR(c); 557 break; 558 } 559 } 560 *bufnext = EOS; 561 #ifdef DEBUG 562 qprintf("glob0:", patbuf); 563 #endif 564 565 if ((err = glob1(patbuf, pglob, limit)) != 0) 566 return(err); 567 568 if (origpat != NULL) 569 return (globfinal(pglob, limit, oldpathc, origpat)); 570 571 return (0); 572 } 573 574 static int 575 globfinal(glob11_t *pglob, struct glob_limit *limit, size_t oldpathc, 576 const char *origpat) { 577 if (pglob->gl_pathc == oldpathc) 578 return (err_nomatch(pglob, limit, origpat)); 579 580 if (!(pglob->gl_flags & GLOB_NOSORT)) 581 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, 582 pglob->gl_pathc - oldpathc, sizeof(char *), compare); 583 584 return (0); 585 } 586 587 static int 588 compare(const void *p, const void *q) 589 { 590 return (strcoll(*(char **)p, *(char **)q)); 591 } 592 593 static int 594 glob1(Char *pattern, glob11_t *pglob, struct glob_limit *limit) 595 { 596 Char pathbuf[MAXPATHLEN]; 597 598 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */ 599 if (*pattern == EOS) 600 return (0); 601 return (glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 1, 602 pattern, pglob, limit)); 603 } 604 605 /* 606 * The functions glob2 and glob3 are mutually recursive; there is one level 607 * of recursion for each segment in the pattern that contains one or more 608 * meta characters. 609 */ 610 static int 611 glob2(Char *pathbuf, Char *pathend, Char *pathend_last, Char *pattern, 612 glob11_t *pglob, struct glob_limit *limit) 613 { 614 struct freebsd11_stat sb; 615 Char *p, *q; 616 int anymeta; 617 618 /* 619 * Loop over pattern segments until end of pattern or until 620 * segment with meta character found. 621 */ 622 for (anymeta = 0;;) { 623 if (*pattern == EOS) { /* End of pattern? */ 624 *pathend = EOS; 625 if (g_lstat(pathbuf, &sb, pglob)) 626 return (0); 627 628 if ((pglob->gl_flags & GLOB_LIMIT) && 629 limit->l_stat_cnt++ >= GLOB_LIMIT_STAT) { 630 errno = E2BIG; 631 return (GLOB_NOSPACE); 632 } 633 if ((pglob->gl_flags & GLOB_MARK) && 634 UNPROT(pathend[-1]) != SEP && 635 (S_ISDIR(sb.st_mode) || 636 (S_ISLNK(sb.st_mode) && 637 g_stat(pathbuf, &sb, pglob) == 0 && 638 S_ISDIR(sb.st_mode)))) { 639 if (pathend + 1 > pathend_last) { 640 errno = E2BIG; 641 return (GLOB_NOSPACE); 642 } 643 *pathend++ = SEP; 644 *pathend = EOS; 645 } 646 ++pglob->gl_matchc; 647 return (globextend(pathbuf, pglob, limit, NULL)); 648 } 649 650 /* Find end of next segment, copy tentatively to pathend. */ 651 q = pathend; 652 p = pattern; 653 while (*p != EOS && UNPROT(*p) != SEP) { 654 if (ismeta(*p)) 655 anymeta = 1; 656 if (q + 1 > pathend_last) { 657 errno = E2BIG; 658 return (GLOB_NOSPACE); 659 } 660 *q++ = *p++; 661 } 662 663 if (!anymeta) { /* No expansion, do next segment. */ 664 pathend = q; 665 pattern = p; 666 while (UNPROT(*pattern) == SEP) { 667 if (pathend + 1 > pathend_last) { 668 errno = E2BIG; 669 return (GLOB_NOSPACE); 670 } 671 *pathend++ = *pattern++; 672 } 673 } else /* Need expansion, recurse. */ 674 return (glob3(pathbuf, pathend, pathend_last, pattern, 675 p, pglob, limit)); 676 } 677 /* NOTREACHED */ 678 } 679 680 static int 681 glob3(Char *pathbuf, Char *pathend, Char *pathend_last, 682 Char *pattern, Char *restpattern, 683 glob11_t *pglob, struct glob_limit *limit) 684 { 685 struct freebsd11_dirent *dp; 686 DIR *dirp; 687 int err, too_long, saverrno, saverrno2; 688 char buf[MAXPATHLEN + MB_LEN_MAX - 1]; 689 690 struct freebsd11_dirent *(*readdirfunc)(DIR *); 691 692 if (pathend > pathend_last) { 693 errno = E2BIG; 694 return (GLOB_NOSPACE); 695 } 696 *pathend = EOS; 697 if (pglob->gl_errfunc != NULL && 698 g_Ctoc(pathbuf, buf, sizeof(buf))) { 699 errno = E2BIG; 700 return (GLOB_NOSPACE); 701 } 702 703 saverrno = errno; 704 errno = 0; 705 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) { 706 if (errno == ENOENT || errno == ENOTDIR) 707 return (0); 708 err = err_aborted(pglob, errno, buf); 709 if (errno == 0) 710 errno = saverrno; 711 return (err); 712 } 713 714 err = 0; 715 716 /* pglob->gl_readdir takes a void *, fix this manually */ 717 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 718 readdirfunc = 719 (struct freebsd11_dirent *(*)(DIR *))pglob->gl_readdir; 720 else 721 readdirfunc = freebsd11_readdir; 722 723 errno = 0; 724 /* Search directory for matching names. */ 725 while ((dp = (*readdirfunc)(dirp)) != NULL) { 726 char *sc; 727 Char *dc; 728 wchar_t wc; 729 size_t clen; 730 mbstate_t mbs; 731 732 if ((pglob->gl_flags & GLOB_LIMIT) && 733 limit->l_readdir_cnt++ >= GLOB_LIMIT_READDIR) { 734 errno = E2BIG; 735 err = GLOB_NOSPACE; 736 break; 737 } 738 739 /* Initial DOT must be matched literally. */ 740 if (dp->d_name[0] == '.' && UNPROT(*pattern) != DOT) { 741 errno = 0; 742 continue; 743 } 744 memset(&mbs, 0, sizeof(mbs)); 745 dc = pathend; 746 sc = dp->d_name; 747 too_long = 1; 748 while (dc <= pathend_last) { 749 clen = mbrtowc(&wc, sc, MB_LEN_MAX, &mbs); 750 if (clen == (size_t)-1 || clen == (size_t)-2) { 751 /* XXX See initial comment #2. */ 752 wc = (unsigned char)*sc; 753 clen = 1; 754 memset(&mbs, 0, sizeof(mbs)); 755 } 756 if ((*dc++ = wc) == EOS) { 757 too_long = 0; 758 break; 759 } 760 sc += clen; 761 } 762 if (too_long && (err = err_aborted(pglob, ENAMETOOLONG, 763 buf))) { 764 errno = ENAMETOOLONG; 765 break; 766 } 767 if (too_long || !match(pathend, pattern, restpattern)) { 768 *pathend = EOS; 769 errno = 0; 770 continue; 771 } 772 if (errno == 0) 773 errno = saverrno; 774 err = glob2(pathbuf, --dc, pathend_last, restpattern, 775 pglob, limit); 776 if (err) 777 break; 778 errno = 0; 779 } 780 781 saverrno2 = errno; 782 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 783 (*pglob->gl_closedir)(dirp); 784 else 785 closedir(dirp); 786 errno = saverrno2; 787 788 if (err) 789 return (err); 790 791 if (dp == NULL && errno != 0 && 792 (err = err_aborted(pglob, errno, buf))) 793 return (err); 794 795 if (errno == 0) 796 errno = saverrno; 797 return (0); 798 } 799 800 801 /* 802 * Extend the gl_pathv member of a glob11_t structure to accommodate a new item, 803 * add the new item, and update gl_pathc. 804 * 805 * This assumes the BSD realloc, which only copies the block when its size 806 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic 807 * behavior. 808 * 809 * Return 0 if new item added, error code if memory couldn't be allocated. 810 * 811 * Invariant of the glob11_t structure: 812 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and 813 * gl_pathv points to (gl_offs + gl_pathc + 1) items. 814 */ 815 static int 816 globextend(const Char *path, glob11_t *pglob, struct glob_limit *limit, 817 const char *origpat) 818 { 819 char **pathv; 820 size_t i, newn, len; 821 char *copy; 822 const Char *p; 823 824 if ((pglob->gl_flags & GLOB_LIMIT) && 825 pglob->gl_matchc > limit->l_path_lim) { 826 errno = E2BIG; 827 return (GLOB_NOSPACE); 828 } 829 830 newn = 2 + pglob->gl_pathc + pglob->gl_offs; 831 /* reallocarray(NULL, newn, size) is equivalent to malloc(newn*size). */ 832 pathv = reallocarray(pglob->gl_pathv, newn, sizeof(*pathv)); 833 if (pathv == NULL) 834 return (GLOB_NOSPACE); 835 836 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) { 837 /* first time around -- clear initial gl_offs items */ 838 pathv += pglob->gl_offs; 839 for (i = pglob->gl_offs + 1; --i > 0; ) 840 *--pathv = NULL; 841 } 842 pglob->gl_pathv = pathv; 843 844 if (origpat != NULL) 845 copy = strdup(origpat); 846 else { 847 for (p = path; *p++ != EOS;) 848 continue; 849 len = MB_CUR_MAX * (size_t)(p - path); /* XXX overallocation */ 850 if ((copy = malloc(len)) != NULL) { 851 if (g_Ctoc(path, copy, len)) { 852 free(copy); 853 errno = E2BIG; 854 return (GLOB_NOSPACE); 855 } 856 } 857 } 858 if (copy != NULL) { 859 limit->l_string_cnt += strlen(copy) + 1; 860 if ((pglob->gl_flags & GLOB_LIMIT) && 861 limit->l_string_cnt >= GLOB_LIMIT_STRING) { 862 free(copy); 863 errno = E2BIG; 864 return (GLOB_NOSPACE); 865 } 866 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy; 867 } 868 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL; 869 return (copy == NULL ? GLOB_NOSPACE : 0); 870 } 871 872 /* 873 * pattern matching function for filenames. 874 */ 875 static int 876 match(Char *name, Char *pat, Char *patend) 877 { 878 int ok, negate_range; 879 Char c, k, *nextp, *nextn; 880 struct xlocale_collate *table = 881 (struct xlocale_collate*)__get_locale()->components[XLC_COLLATE]; 882 883 nextn = NULL; 884 nextp = NULL; 885 886 while (1) { 887 while (pat < patend) { 888 c = *pat++; 889 switch (c & M_MASK) { 890 case M_ALL: 891 if (pat == patend) 892 return (1); 893 if (*name == EOS) 894 return (0); 895 nextn = name + 1; 896 nextp = pat - 1; 897 break; 898 case M_ONE: 899 if (*name++ == EOS) 900 goto fail; 901 break; 902 case M_SET: 903 ok = 0; 904 if ((k = *name++) == EOS) 905 goto fail; 906 negate_range = ((*pat & M_MASK) == M_NOT); 907 if (negate_range != 0) 908 ++pat; 909 while (((c = *pat++) & M_MASK) != M_END) 910 if ((*pat & M_MASK) == M_RNG) { 911 if (table->__collate_load_error ? 912 CHAR(c) <= CHAR(k) && 913 CHAR(k) <= CHAR(pat[1]) : 914 __wcollate_range_cmp(CHAR(c), 915 CHAR(k)) <= 0 && 916 __wcollate_range_cmp(CHAR(k), 917 CHAR(pat[1])) <= 0) 918 ok = 1; 919 pat += 2; 920 } else if (c == k) 921 ok = 1; 922 if (ok == negate_range) 923 goto fail; 924 break; 925 default: 926 if (*name++ != c) 927 goto fail; 928 break; 929 } 930 } 931 if (*name == EOS) 932 return (1); 933 934 fail: 935 if (nextn == NULL) 936 break; 937 pat = nextp; 938 name = nextn; 939 } 940 return (0); 941 } 942 943 /* Free allocated data belonging to a glob11_t structure. */ 944 void 945 freebsd11_globfree(glob11_t *pglob) 946 { 947 size_t i; 948 char **pp; 949 950 if (pglob->gl_pathv != NULL) { 951 pp = pglob->gl_pathv + pglob->gl_offs; 952 for (i = pglob->gl_pathc; i--; ++pp) 953 if (*pp) 954 free(*pp); 955 free(pglob->gl_pathv); 956 pglob->gl_pathv = NULL; 957 } 958 } 959 960 static DIR * 961 g_opendir(Char *str, glob11_t *pglob) 962 { 963 char buf[MAXPATHLEN + MB_LEN_MAX - 1]; 964 965 if (*str == EOS) 966 strcpy(buf, "."); 967 else { 968 if (g_Ctoc(str, buf, sizeof(buf))) { 969 errno = ENAMETOOLONG; 970 return (NULL); 971 } 972 } 973 974 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 975 return ((*pglob->gl_opendir)(buf)); 976 977 return (opendir(buf)); 978 } 979 980 static int 981 g_lstat(Char *fn, struct freebsd11_stat *sb, glob11_t *pglob) 982 { 983 char buf[MAXPATHLEN + MB_LEN_MAX - 1]; 984 985 if (g_Ctoc(fn, buf, sizeof(buf))) { 986 errno = ENAMETOOLONG; 987 return (-1); 988 } 989 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 990 return((*pglob->gl_lstat)(buf, sb)); 991 return (freebsd11_lstat(buf, sb)); 992 } 993 994 static int 995 g_stat(Char *fn, struct freebsd11_stat *sb, glob11_t *pglob) 996 { 997 char buf[MAXPATHLEN + MB_LEN_MAX - 1]; 998 999 if (g_Ctoc(fn, buf, sizeof(buf))) { 1000 errno = ENAMETOOLONG; 1001 return (-1); 1002 } 1003 if (pglob->gl_flags & GLOB_ALTDIRFUNC) 1004 return ((*pglob->gl_stat)(buf, sb)); 1005 return (freebsd11_stat(buf, sb)); 1006 } 1007 1008 static const Char * 1009 g_strchr(const Char *str, wchar_t ch) 1010 { 1011 1012 do { 1013 if (*str == ch) 1014 return (str); 1015 } while (*str++); 1016 return (NULL); 1017 } 1018 1019 static int 1020 g_Ctoc(const Char *str, char *buf, size_t len) 1021 { 1022 mbstate_t mbs; 1023 size_t clen; 1024 1025 memset(&mbs, 0, sizeof(mbs)); 1026 while (len >= MB_CUR_MAX) { 1027 clen = wcrtomb(buf, CHAR(*str), &mbs); 1028 if (clen == (size_t)-1) { 1029 /* XXX See initial comment #2. */ 1030 *buf = (char)CHAR(*str); 1031 clen = 1; 1032 memset(&mbs, 0, sizeof(mbs)); 1033 } 1034 if (CHAR(*str) == EOS) 1035 return (0); 1036 str++; 1037 buf += clen; 1038 len -= clen; 1039 } 1040 return (1); 1041 } 1042 1043 static int 1044 err_nomatch(glob11_t *pglob, struct glob_limit *limit, const char *origpat) { 1045 /* 1046 * If there was no match we are going to append the origpat 1047 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified 1048 * and the origpat did not contain any magic characters 1049 * GLOB_NOMAGIC is there just for compatibility with csh. 1050 */ 1051 if ((pglob->gl_flags & GLOB_NOCHECK) || 1052 ((pglob->gl_flags & GLOB_NOMAGIC) && 1053 !(pglob->gl_flags & GLOB_MAGCHAR))) 1054 return (globextend(NULL, pglob, limit, origpat)); 1055 return (GLOB_NOMATCH); 1056 } 1057 1058 static int 1059 err_aborted(glob11_t *pglob, int err, char *buf) { 1060 if ((pglob->gl_errfunc != NULL && pglob->gl_errfunc(buf, err)) || 1061 (pglob->gl_flags & GLOB_ERR)) 1062 return (GLOB_ABORTED); 1063 return (0); 1064 } 1065 1066 #ifdef DEBUG 1067 static void 1068 qprintf(const char *str, Char *s) 1069 { 1070 Char *p; 1071 1072 (void)printf("%s\n", str); 1073 if (s != NULL) { 1074 for (p = s; *p != EOS; p++) 1075 (void)printf("%c", (char)CHAR(*p)); 1076 (void)printf("\n"); 1077 for (p = s; *p != EOS; p++) 1078 (void)printf("%c", (isprot(*p) ? '\\' : ' ')); 1079 (void)printf("\n"); 1080 for (p = s; *p != EOS; p++) 1081 (void)printf("%c", (ismeta(*p) ? '_' : ' ')); 1082 (void)printf("\n"); 1083 } 1084 } 1085 #endif 1086 1087 __sym_compat(glob, freebsd11_glob, FBSD_1.0); 1088 __sym_compat(globfree, freebsd11_globfree, FBSD_1.0); 1089