1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2012 Gary Mills
24 */
25
26 /* $OpenBSD: glob.c,v 1.39 2012/01/20 07:09:42 tedu Exp $ */
27 /*
28 * Copyright (c) 1989, 1993
29 * The Regents of the University of California. All rights reserved.
30 *
31 * This code is derived from software contributed to Berkeley by
32 * Guido van Rossum.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 * 3. Neither the name of the University nor the names of its contributors
43 * may be used to endorse or promote products derived from this software
44 * without specific prior written permission.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 */
58
59 /*
60 * glob(3) -- a superset of the one defined in POSIX 1003.2.
61 *
62 * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
63 *
64 * Optional extra services, controlled by flags not defined by POSIX:
65 *
66 * GLOB_QUOTE:
67 * Escaping convention: \ inhibits any special meaning the following
68 * character might have (except \ at end of string is retained).
69 * GLOB_MAGCHAR:
70 * Set in gl_flags if pattern contained a globbing character.
71 * GLOB_NOMAGIC:
72 * Same as GLOB_NOCHECK, but it will only append pattern if it did
73 * not contain any magic characters. [Used in csh style globbing]
74 * GLOB_ALTDIRFUNC:
75 * Use alternately specified directory access functions.
76 * GLOB_TILDE:
77 * expand ~user/foo to the /home/dir/of/user/foo
78 * GLOB_BRACE:
79 * expand {1,2}{a,b} to 1a 1b 2a 2b
80 * gl_matchc:
81 * Number of matches in the current invocation of glob.
82 */
83
84 #include <sys/param.h>
85 #include <sys/stat.h>
86
87 #include <ctype.h>
88 #include <dirent.h>
89 #include <errno.h>
90 #include <glob.h>
91 #include <limits.h>
92 #include <pwd.h>
93 #include <stdio.h>
94 #include <stdlib.h>
95 #include <string.h>
96 #include <unistd.h>
97
98 #include "charclass.h"
99
100 #define DOLLAR '$'
101 #define DOT '.'
102 #define EOS '\0'
103 #define LBRACKET '['
104 #define NOT '!'
105 #define QUESTION '?'
106 #define QUOTE '\\'
107 #define RANGE '-'
108 #define RBRACKET ']'
109 #define SEP '/'
110 #define STAR '*'
111 #define TILDE '~'
112 #define UNDERSCORE '_'
113 #define LBRACE '{'
114 #define RBRACE '}'
115 #define SLASH '/'
116 #define COMMA ','
117
118 #ifndef DEBUG
119
120 #define M_QUOTE 0x8000
121 #define M_PROTECT 0x4000
122 #define M_MASK 0xffff
123 #define M_ASCII 0x00ff
124
125 typedef ushort_t Char;
126
127 #else
128
129 #define M_QUOTE 0x80
130 #define M_PROTECT 0x40
131 #define M_MASK 0xff
132 #define M_ASCII 0x7f
133
134 typedef char Char;
135
136 #endif
137
138
139 #define CHAR(c) ((Char)((c)&M_ASCII))
140 #define META(c) ((Char)((c)|M_QUOTE))
141 #define M_ALL META('*')
142 #define M_END META(']')
143 #define M_NOT META('!')
144 #define M_ONE META('?')
145 #define M_RNG META('-')
146 #define M_SET META('[')
147 #define M_CLASS META(':')
148 #define ismeta(c) (((c)&M_QUOTE) != 0)
149
150 #define GLOB_LIMIT_MALLOC 65536
151 #define GLOB_LIMIT_STAT 2048
152 #define GLOB_LIMIT_READDIR 16384
153
154 /* Limit of recursion during matching attempts. */
155 #define GLOB_LIMIT_RECUR 64
156
157 struct glob_lim {
158 size_t glim_malloc;
159 size_t glim_stat;
160 size_t glim_readdir;
161 };
162
163 struct glob_path_stat {
164 char *gps_path;
165 struct stat *gps_stat;
166 };
167
168 static int compare(const void *, const void *);
169 static int compare_gps(const void *, const void *);
170 static int g_Ctoc(const Char *, char *, uint_t);
171 static int g_lstat(Char *, struct stat *, glob_t *);
172 static DIR *g_opendir(Char *, glob_t *);
173 static Char *g_strchr(const Char *, int);
174 static int g_strncmp(const Char *, const char *, size_t);
175 static int g_stat(Char *, struct stat *, glob_t *);
176 static int glob0(const Char *, glob_t *, struct glob_lim *,
177 int (*)(const char *, int));
178 static int glob1(Char *, Char *, glob_t *, struct glob_lim *,
179 int (*)(const char *, int));
180 static int glob2(Char *, Char *, Char *, Char *, Char *, Char *,
181 glob_t *, struct glob_lim *,
182 int (*)(const char *, int));
183 static int glob3(Char *, Char *, Char *, Char *, Char *,
184 Char *, Char *, glob_t *, struct glob_lim *,
185 int (*)(const char *, int));
186 static int globextend(const Char *, glob_t *, struct glob_lim *,
187 struct stat *);
188 static
189 const Char *globtilde(const Char *, Char *, size_t, glob_t *);
190 static int globexp1(const Char *, glob_t *, struct glob_lim *,
191 int (*)(const char *, int));
192 static int globexp2(const Char *, const Char *, glob_t *,
193 struct glob_lim *, int (*)(const char *, int));
194 static int match(Char *, Char *, Char *, int);
195 #ifdef DEBUG
196 static void qprintf(const char *, Char *);
197 #endif
198
199 int
200 glob(const char *pattern, int flags, int (*errfunc)(const char *, int),
201 glob_t *pglob)
202 {
203 const uchar_t *patnext;
204 int c;
205 Char *bufnext, *bufend, patbuf[MAXPATHLEN];
206 struct glob_lim limit = { 0, 0, 0 };
207
208 if (strnlen(pattern, PATH_MAX) == PATH_MAX)
209 return (GLOB_NOMATCH);
210
211 patnext = (uchar_t *)pattern;
212 if (!(flags & GLOB_APPEND)) {
213 pglob->gl_pathc = 0;
214 pglob->gl_pathv = NULL;
215 if ((flags & GLOB_KEEPSTAT) != 0)
216 pglob->gl_statv = NULL;
217 if (!(flags & GLOB_DOOFFS))
218 pglob->gl_offs = 0;
219 }
220 pglob->gl_flags = flags & ~GLOB_MAGCHAR;
221 pglob->gl_matchc = 0;
222
223 if (pglob->gl_offs < 0 || pglob->gl_pathc < 0 ||
224 pglob->gl_offs >= INT_MAX || pglob->gl_pathc >= INT_MAX ||
225 pglob->gl_pathc >= INT_MAX - pglob->gl_offs - 1)
226 return (GLOB_NOSPACE);
227
228 bufnext = patbuf;
229 bufend = bufnext + MAXPATHLEN - 1;
230 if (flags & GLOB_NOESCAPE)
231 while (bufnext < bufend && (c = *patnext++) != EOS)
232 *bufnext++ = c;
233 else {
234 /* Protect the quoted characters. */
235 while (bufnext < bufend && (c = *patnext++) != EOS)
236 if (c == QUOTE) {
237 if ((c = *patnext++) == EOS) {
238 c = QUOTE;
239 --patnext;
240 }
241 *bufnext++ = c | M_PROTECT;
242 } else
243 *bufnext++ = c;
244 }
245 *bufnext = EOS;
246
247 if (flags & GLOB_BRACE)
248 return (globexp1(patbuf, pglob, &limit, errfunc));
249 else
250 return (glob0(patbuf, pglob, &limit, errfunc));
251 }
252
253 /*
254 * Expand recursively a glob {} pattern. When there is no more expansion
255 * invoke the standard globbing routine to glob the rest of the magic
256 * characters
257 */
258 static int
259 globexp1(const Char *pattern, glob_t *pglob, struct glob_lim *limitp,
260 int (*errfunc)(const char *, int))
261 {
262 const Char* ptr = pattern;
263
264 /* Protect a single {}, for find(1), like csh */
265 if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
266 return (glob0(pattern, pglob, limitp, errfunc));
267
268 if ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
269 return (globexp2(ptr, pattern, pglob, limitp, errfunc));
270
271 return (glob0(pattern, pglob, limitp, errfunc));
272 }
273
274
275 /*
276 * Recursive brace globbing helper. Tries to expand a single brace.
277 * If it succeeds then it invokes globexp1 with the new pattern.
278 * If it fails then it tries to glob the rest of the pattern and returns.
279 */
280 static int
281 globexp2(const Char *ptr, const Char *pattern, glob_t *pglob,
282 struct glob_lim *limitp, int (*errfunc)(const char *, int))
283 {
284 int i, rv;
285 Char *lm, *ls;
286 const Char *pe, *pm, *pl;
287 Char patbuf[MAXPATHLEN];
288
289 /* copy part up to the brace */
290 for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
291 ;
292 *lm = EOS;
293 ls = lm;
294
295 /* Find the balanced brace */
296 for (i = 0, pe = ++ptr; *pe; pe++)
297 if (*pe == LBRACKET) {
298 /* Ignore everything between [] */
299 for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
300 ;
301 if (*pe == EOS) {
302 /*
303 * We could not find a matching RBRACKET.
304 * Ignore and just look for RBRACE
305 */
306 pe = pm;
307 }
308 } else if (*pe == LBRACE)
309 i++;
310 else if (*pe == RBRACE) {
311 if (i == 0)
312 break;
313 i--;
314 }
315
316 /* Non matching braces; just glob the pattern */
317 if (i != 0 || *pe == EOS)
318 return (glob0(patbuf, pglob, limitp, errfunc));
319
320 for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
321 switch (*pm) {
322 case LBRACKET:
323 /* Ignore everything between [] */
324 for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
325 ;
326 if (*pm == EOS) {
327 /*
328 * We could not find a matching RBRACKET.
329 * Ignore and just look for RBRACE
330 */
331 pm = pl;
332 }
333 break;
334
335 case LBRACE:
336 i++;
337 break;
338
339 case RBRACE:
340 if (i) {
341 i--;
342 break;
343 }
344 /* FALLTHROUGH */
345 case COMMA:
346 if (i && *pm == COMMA)
347 break;
348 else {
349 /* Append the current string */
350 for (lm = ls; (pl < pm); *lm++ = *pl++)
351 ;
352
353 /*
354 * Append the rest of the pattern after the
355 * closing brace
356 */
357 for (pl = pe + 1; (*lm++ = *pl++) != EOS; )
358 ;
359
360 /* Expand the current pattern */
361 #ifdef DEBUG
362 qprintf("globexp2:", patbuf);
363 #endif
364 rv = globexp1(patbuf, pglob, limitp, errfunc);
365 if (rv && rv != GLOB_NOMATCH)
366 return (rv);
367
368 /* move after the comma, to the next string */
369 pl = pm + 1;
370 }
371 break;
372
373 default:
374 break;
375 }
376 }
377 return (0);
378 }
379
380
381
382 /*
383 * expand tilde from the passwd file.
384 */
385 static const Char *
386 globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob)
387 {
388 struct passwd *pwd;
389 char *h;
390 const Char *p;
391 Char *b, *eb;
392
393 if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
394 return (pattern);
395
396 /* Copy up to the end of the string or / */
397 eb = &patbuf[patbuf_len - 1];
398 for (p = pattern + 1, h = (char *)patbuf;
399 h < (char *)eb && *p && *p != SLASH; *h++ = *p++)
400 ;
401
402 *h = EOS;
403
404 #if 0
405 if (h == (char *)eb)
406 return (what);
407 #endif
408
409 if (((char *)patbuf)[0] == EOS) {
410 /*
411 * handle a plain ~ or ~/ by expanding $HOME
412 * first and then trying the password file
413 */
414 if (issetugid() != 0 || (h = getenv("HOME")) == NULL) {
415 if ((pwd = getpwuid(getuid())) == NULL)
416 return (pattern);
417 else
418 h = pwd->pw_dir;
419 }
420 } else {
421 /*
422 * Expand a ~user
423 */
424 if ((pwd = getpwnam((char *)patbuf)) == NULL)
425 return (pattern);
426 else
427 h = pwd->pw_dir;
428 }
429
430 /* Copy the home directory */
431 for (b = patbuf; b < eb && *h; *b++ = *h++)
432 ;
433
434 /* Append the rest of the pattern */
435 while (b < eb && (*b++ = *p++) != EOS)
436 ;
437 *b = EOS;
438
439 return (patbuf);
440 }
441
442 static int
443 g_strncmp(const Char *s1, const char *s2, size_t n)
444 {
445 int rv = 0;
446
447 while (n--) {
448 rv = *(Char *)s1 - *(const unsigned char *)s2++;
449 if (rv)
450 break;
451 if (*s1++ == '\0')
452 break;
453 }
454 return (rv);
455 }
456
457 static int
458 g_charclass(const Char **patternp, Char **bufnextp)
459 {
460 const Char *pattern = *patternp + 1;
461 Char *bufnext = *bufnextp;
462 const Char *colon;
463 struct cclass *cc;
464 size_t len;
465
466 if ((colon = g_strchr(pattern, ':')) == NULL || colon[1] != ']')
467 return (1); /* not a character class */
468
469 len = (size_t)(colon - pattern);
470 for (cc = cclasses; cc->name != NULL; cc++) {
471 if (!g_strncmp(pattern, cc->name, len) && cc->name[len] == '\0')
472 break;
473 }
474 if (cc->name == NULL)
475 return (-1); /* invalid character class */
476 *bufnext++ = M_CLASS;
477 *bufnext++ = (Char)(cc - &cclasses[0]);
478 *bufnextp = bufnext;
479 *patternp += len + 3;
480
481 return (0);
482 }
483
484 /*
485 * The main glob() routine: compiles the pattern (optionally processing
486 * quotes), calls glob1() to do the real pattern matching, and finally
487 * sorts the list (unless unsorted operation is requested). Returns 0
488 * if things went well, nonzero if errors occurred. It is not an error
489 * to find no matches.
490 */
491 static int
492 glob0(const Char *pattern, glob_t *pglob, struct glob_lim *limitp,
493 int (*errfunc)(const char *, int))
494 {
495 const Char *qpatnext;
496 int c, err, oldpathc;
497 Char *bufnext, patbuf[MAXPATHLEN];
498
499 qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob);
500 oldpathc = pglob->gl_pathc;
501 bufnext = patbuf;
502
503 /* We don't need to check for buffer overflow any more. */
504 while ((c = *qpatnext++) != EOS) {
505 switch (c) {
506 case LBRACKET:
507 c = *qpatnext;
508 if (c == NOT)
509 ++qpatnext;
510 if (*qpatnext == EOS ||
511 g_strchr(qpatnext+1, RBRACKET) == NULL) {
512 *bufnext++ = LBRACKET;
513 if (c == NOT)
514 --qpatnext;
515 break;
516 }
517 *bufnext++ = M_SET;
518 if (c == NOT)
519 *bufnext++ = M_NOT;
520 c = *qpatnext++;
521 do {
522 if (c == LBRACKET && *qpatnext == ':') {
523 do {
524 err = g_charclass(&qpatnext,
525 &bufnext);
526 if (err)
527 break;
528 c = *qpatnext++;
529 } while (c == LBRACKET &&
530 *qpatnext == ':');
531 if (err == -1 &&
532 !(pglob->gl_flags & GLOB_NOCHECK))
533 return (GLOB_NOMATCH);
534 if (c == RBRACKET)
535 break;
536 }
537 *bufnext++ = CHAR(c);
538 if (*qpatnext == RANGE &&
539 (c = qpatnext[1]) != RBRACKET) {
540 *bufnext++ = M_RNG;
541 *bufnext++ = CHAR(c);
542 qpatnext += 2;
543 }
544 } while ((c = *qpatnext++) != RBRACKET);
545 pglob->gl_flags |= GLOB_MAGCHAR;
546 *bufnext++ = M_END;
547 break;
548 case QUESTION:
549 pglob->gl_flags |= GLOB_MAGCHAR;
550 *bufnext++ = M_ONE;
551 break;
552 case STAR:
553 pglob->gl_flags |= GLOB_MAGCHAR;
554 /*
555 * collapse adjacent stars to one,
556 * to avoid exponential behavior
557 */
558 if (bufnext == patbuf || bufnext[-1] != M_ALL)
559 *bufnext++ = M_ALL;
560 break;
561 default:
562 *bufnext++ = CHAR(c);
563 break;
564 }
565 }
566 *bufnext = EOS;
567 #ifdef DEBUG
568 qprintf("glob0:", patbuf);
569 #endif
570
571 if ((err = glob1(patbuf, patbuf+MAXPATHLEN-1, pglob, limitp, errfunc))
572 != 0)
573 return (err);
574
575 /*
576 * If there was no match we are going to append the pattern
577 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
578 * and the pattern did not contain any magic characters
579 * GLOB_NOMAGIC is there just for compatibility with csh.
580 */
581 if (pglob->gl_pathc == oldpathc) {
582 if ((pglob->gl_flags & GLOB_NOCHECK) ||
583 ((pglob->gl_flags & GLOB_NOMAGIC) &&
584 !(pglob->gl_flags & GLOB_MAGCHAR)))
585 return (globextend(pattern, pglob, limitp, NULL));
586 else
587 return (GLOB_NOMATCH);
588 }
589 if (!(pglob->gl_flags & GLOB_NOSORT)) {
590 if ((pglob->gl_flags & GLOB_KEEPSTAT)) {
591 /* Keep the paths and stat info synced during sort */
592 struct glob_path_stat *path_stat;
593 int i;
594 int n = pglob->gl_pathc - oldpathc;
595 int o = pglob->gl_offs + oldpathc;
596
597 if ((path_stat = calloc(n, sizeof (*path_stat))) ==
598 NULL)
599 return (GLOB_NOSPACE);
600 for (i = 0; i < n; i++) {
601 path_stat[i].gps_path = pglob->gl_pathv[o + i];
602 path_stat[i].gps_stat = pglob->gl_statv[o + i];
603 }
604 qsort(path_stat, n, sizeof (*path_stat), compare_gps);
605 for (i = 0; i < n; i++) {
606 pglob->gl_pathv[o + i] = path_stat[i].gps_path;
607 pglob->gl_statv[o + i] = path_stat[i].gps_stat;
608 }
609 free(path_stat);
610 } else {
611 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
612 pglob->gl_pathc - oldpathc, sizeof (char *),
613 compare);
614 }
615 }
616 return (0);
617 }
618
619 static int
620 compare(const void *p, const void *q)
621 {
622 return (strcmp(*(char **)p, *(char **)q));
623 }
624
625 static int
626 compare_gps(const void *_p, const void *_q)
627 {
628 const struct glob_path_stat *p = (const struct glob_path_stat *)_p;
629 const struct glob_path_stat *q = (const struct glob_path_stat *)_q;
630
631 return (strcmp(p->gps_path, q->gps_path));
632 }
633
634 static int
635 glob1(Char *pattern, Char *pattern_last, glob_t *pglob,
636 struct glob_lim *limitp, int (*errfunc)(const char *, int))
637 {
638 Char pathbuf[MAXPATHLEN];
639
640 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
641 if (*pattern == EOS)
642 return (0);
643 return (glob2(pathbuf, pathbuf+MAXPATHLEN-1,
644 pathbuf, pathbuf+MAXPATHLEN-1,
645 pattern, pattern_last, pglob, limitp, errfunc));
646 }
647
648 /*
649 * The functions glob2 and glob3 are mutually recursive; there is one level
650 * of recursion for each segment in the pattern that contains one or more
651 * meta characters.
652 */
653 static int
654 glob2(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last,
655 Char *pattern, Char *pattern_last, glob_t *pglob,
656 struct glob_lim *limitp, int (*errfunc)(const char *, int))
657 {
658 struct stat sb;
659 Char *p, *q;
660 int anymeta;
661
662 /*
663 * Loop over pattern segments until end of pattern or until
664 * segment with meta character found.
665 */
666 for (anymeta = 0; ; ) {
667 if (*pattern == EOS) { /* End of pattern? */
668 *pathend = EOS;
669
670 if ((pglob->gl_flags & GLOB_LIMIT) &&
671 limitp->glim_stat++ >= GLOB_LIMIT_STAT) {
672 errno = 0;
673 *pathend++ = SEP;
674 *pathend = EOS;
675 return (GLOB_NOSPACE);
676 }
677 if (g_lstat(pathbuf, &sb, pglob))
678 return (0);
679
680 if (((pglob->gl_flags & GLOB_MARK) &&
681 pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
682 (S_ISLNK(sb.st_mode) &&
683 (g_stat(pathbuf, &sb, pglob) == 0) &&
684 S_ISDIR(sb.st_mode)))) {
685 if (pathend+1 > pathend_last)
686 return (1);
687 *pathend++ = SEP;
688 *pathend = EOS;
689 }
690 ++pglob->gl_matchc;
691 return (globextend(pathbuf, pglob, limitp, &sb));
692 }
693
694 /* Find end of next segment, copy tentatively to pathend. */
695 q = pathend;
696 p = pattern;
697 while (*p != EOS && *p != SEP) {
698 if (ismeta(*p))
699 anymeta = 1;
700 if (q+1 > pathend_last)
701 return (1);
702 *q++ = *p++;
703 }
704
705 if (!anymeta) { /* No expansion, do next segment. */
706 pathend = q;
707 pattern = p;
708 while (*pattern == SEP) {
709 if (pathend+1 > pathend_last)
710 return (1);
711 *pathend++ = *pattern++;
712 }
713 } else
714 /* Need expansion, recurse. */
715 return (glob3(pathbuf, pathbuf_last, pathend,
716 pathend_last, pattern, p, pattern_last,
717 pglob, limitp, errfunc));
718 }
719 /* NOTREACHED */
720 }
721
722 static int
723 glob3(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last,
724 Char *pattern, Char *restpattern, Char *restpattern_last, glob_t *pglob,
725 struct glob_lim *limitp, int (*errfunc)(const char *, int))
726 {
727 struct dirent *dp;
728 DIR *dirp;
729 int err;
730 char buf[MAXPATHLEN];
731
732 /*
733 * The readdirfunc declaration can't be prototyped, because it is
734 * assigned, below, to two functions which are prototyped in glob.h
735 * and dirent.h as taking pointers to differently typed opaque
736 * structures.
737 */
738 struct dirent *(*readdirfunc)(void *);
739
740 if (pathend > pathend_last)
741 return (1);
742 *pathend = EOS;
743 errno = 0;
744
745 if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
746 /* TODO: don't call for ENOENT or ENOTDIR? */
747 if (errfunc) {
748 if (g_Ctoc(pathbuf, buf, sizeof (buf)))
749 return (GLOB_ABORTED);
750 if (errfunc(buf, errno) ||
751 pglob->gl_flags & GLOB_ERR)
752 return (GLOB_ABORTED);
753 }
754 return (0);
755 }
756
757 err = 0;
758
759 /* Search directory for matching names. */
760 if (pglob->gl_flags & GLOB_ALTDIRFUNC)
761 readdirfunc = pglob->gl_readdir;
762 else
763 readdirfunc = (struct dirent *(*)(void *))readdir;
764 while ((dp = (*readdirfunc)(dirp))) {
765 uchar_t *sc;
766 Char *dc;
767
768 if ((pglob->gl_flags & GLOB_LIMIT) &&
769 limitp->glim_readdir++ >= GLOB_LIMIT_READDIR) {
770 errno = 0;
771 *pathend++ = SEP;
772 *pathend = EOS;
773 err = GLOB_NOSPACE;
774 break;
775 }
776
777 /* Initial DOT must be matched literally. */
778 if (dp->d_name[0] == DOT && *pattern != DOT)
779 continue;
780 dc = pathend;
781 sc = (uchar_t *)dp->d_name;
782 while (dc < pathend_last && (*dc++ = *sc++) != EOS)
783 ;
784 if (dc >= pathend_last) {
785 *dc = EOS;
786 err = 1;
787 break;
788 }
789
790 if (!match(pathend, pattern, restpattern, GLOB_LIMIT_RECUR)) {
791 *pathend = EOS;
792 continue;
793 }
794 err = glob2(pathbuf, pathbuf_last, --dc, pathend_last,
795 restpattern, restpattern_last, pglob, limitp,
796 errfunc);
797 if (err)
798 break;
799 }
800
801 if (pglob->gl_flags & GLOB_ALTDIRFUNC)
802 (*pglob->gl_closedir)(dirp);
803 else
804 closedir(dirp);
805 return (err);
806 }
807
808
809 /*
810 * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
811 * add the new item, and update gl_pathc.
812 *
813 * This assumes the BSD realloc, which only copies the block when its size
814 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
815 * behavior.
816 *
817 * Return 0 if new item added, error code if memory couldn't be allocated.
818 *
819 * Invariant of the glob_t structure:
820 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
821 * gl_pathv points to (gl_offs + gl_pathc + 1) items.
822 */
823 static int
824 globextend(const Char *path, glob_t *pglob, struct glob_lim *limitp,
825 struct stat *sb)
826 {
827 char **pathv;
828 ssize_t i;
829 size_t newn, len;
830 char *copy = NULL;
831 const Char *p;
832 struct stat **statv;
833
834 newn = 2 + pglob->gl_pathc + pglob->gl_offs;
835 if (pglob->gl_offs >= INT_MAX ||
836 pglob->gl_pathc >= INT_MAX ||
837 newn >= INT_MAX ||
838 SIZE_MAX / sizeof (*pathv) <= newn ||
839 SIZE_MAX / sizeof (*statv) <= newn) {
840 nospace:
841 for (i = pglob->gl_offs; i < (ssize_t)(newn - 2); i++) {
842 if (pglob->gl_pathv && pglob->gl_pathv[i])
843 free(pglob->gl_pathv[i]);
844 if ((pglob->gl_flags & GLOB_KEEPSTAT) != 0 &&
845 pglob->gl_pathv && pglob->gl_pathv[i])
846 free(pglob->gl_statv[i]);
847 }
848 if (pglob->gl_pathv) {
849 free(pglob->gl_pathv);
850 pglob->gl_pathv = NULL;
851 }
852 if ((pglob->gl_flags & GLOB_KEEPSTAT) != 0 &&
853 pglob->gl_statv) {
854 free(pglob->gl_statv);
855 pglob->gl_statv = NULL;
856 }
857 return (GLOB_NOSPACE);
858 }
859
860 pathv = realloc(pglob->gl_pathv, newn * sizeof (*pathv));
861 if (pathv == NULL)
862 goto nospace;
863 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
864 /* first time around -- clear initial gl_offs items */
865 pathv += pglob->gl_offs;
866 for (i = pglob->gl_offs; --i >= 0; )
867 *--pathv = NULL;
868 }
869 pglob->gl_pathv = pathv;
870
871 if ((pglob->gl_flags & GLOB_KEEPSTAT) != 0) {
872 statv = realloc(pglob->gl_statv, newn * sizeof (*statv));
873 if (statv == NULL)
874 goto nospace;
875 if (pglob->gl_statv == NULL && pglob->gl_offs > 0) {
876 /* first time around -- clear initial gl_offs items */
877 statv += pglob->gl_offs;
878 for (i = pglob->gl_offs; --i >= 0; )
879 *--statv = NULL;
880 }
881 pglob->gl_statv = statv;
882 if (sb == NULL)
883 statv[pglob->gl_offs + pglob->gl_pathc] = NULL;
884 else {
885 limitp->glim_malloc += sizeof (**statv);
886 if ((pglob->gl_flags & GLOB_LIMIT) &&
887 limitp->glim_malloc >= GLOB_LIMIT_MALLOC) {
888 errno = 0;
889 return (GLOB_NOSPACE);
890 }
891 if ((statv[pglob->gl_offs + pglob->gl_pathc] =
892 malloc(sizeof (**statv))) == NULL)
893 goto copy_error;
894 memcpy(statv[pglob->gl_offs + pglob->gl_pathc], sb,
895 sizeof (*sb));
896 }
897 statv[pglob->gl_offs + pglob->gl_pathc + 1] = NULL;
898 }
899
900 for (p = path; *p++; )
901 ;
902 len = (size_t)(p - path);
903 limitp->glim_malloc += len;
904 if ((copy = malloc(len)) != NULL) {
905 if (g_Ctoc(path, copy, len)) {
906 free(copy);
907 return (GLOB_NOSPACE);
908 }
909 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
910 }
911 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
912
913 if ((pglob->gl_flags & GLOB_LIMIT) &&
914 (newn * sizeof (*pathv)) + limitp->glim_malloc >
915 GLOB_LIMIT_MALLOC) {
916 errno = 0;
917 return (GLOB_NOSPACE);
918 }
919 copy_error:
920 return (copy == NULL ? GLOB_NOSPACE : 0);
921 }
922
923
924 /*
925 * pattern matching function for filenames. Each occurrence of the *
926 * pattern causes a recursion level.
927 */
928 static int
929 match(Char *name, Char *pat, Char *patend, int recur)
930 {
931 int ok, negate_range;
932 Char c, k;
933
934 if (recur-- == 0)
935 return (GLOB_NOSPACE);
936
937 while (pat < patend) {
938 c = *pat++;
939 switch (c & M_MASK) {
940 case M_ALL:
941 while (pat < patend && (*pat & M_MASK) == M_ALL)
942 pat++; /* eat consecutive '*' */
943 if (pat == patend)
944 return (1);
945 do {
946 if (match(name, pat, patend, recur))
947 return (1);
948 } while (*name++ != EOS);
949 return (0);
950 case M_ONE:
951 if (*name++ == EOS)
952 return (0);
953 break;
954 case M_SET:
955 ok = 0;
956 if ((k = *name++) == EOS)
957 return (0);
958 if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
959 ++pat;
960 while (((c = *pat++) & M_MASK) != M_END) {
961 if ((c & M_MASK) == M_CLASS) {
962 Char idx = *pat & M_MASK;
963 if (idx < NCCLASSES &&
964 cclasses[idx].isctype(k))
965 ok = 1;
966 ++pat;
967 }
968 if ((*pat & M_MASK) == M_RNG) {
969 if (c <= k && k <= pat[1])
970 ok = 1;
971 pat += 2;
972 } else if (c == k)
973 ok = 1;
974 }
975 if (ok == negate_range)
976 return (0);
977 break;
978 default:
979 if (*name++ != c)
980 return (0);
981 break;
982 }
983 }
984 return (*name == EOS);
985 }
986
987 /* Free allocated data belonging to a glob_t structure. */
988 void
989 globfree(glob_t *pglob)
990 {
991 int i;
992 char **pp;
993
994 if (pglob->gl_pathv != NULL) {
995 pp = pglob->gl_pathv + pglob->gl_offs;
996 for (i = pglob->gl_pathc; i--; ++pp)
997 if (*pp)
998 free(*pp);
999 free(pglob->gl_pathv);
1000 pglob->gl_pathv = NULL;
1001 }
1002 if ((pglob->gl_flags & GLOB_KEEPSTAT) != 0 &&
1003 pglob->gl_statv != NULL) {
1004 for (i = 0; i < pglob->gl_pathc; i++) {
1005 if (pglob->gl_statv[i] != NULL)
1006 free(pglob->gl_statv[i]);
1007 }
1008 free(pglob->gl_statv);
1009 pglob->gl_statv = NULL;
1010 }
1011 }
1012
1013 static DIR *
1014 g_opendir(Char *str, glob_t *pglob)
1015 {
1016 char buf[MAXPATHLEN];
1017
1018 if (!*str)
1019 strlcpy(buf, ".", sizeof (buf));
1020 else {
1021 if (g_Ctoc(str, buf, sizeof (buf)))
1022 return (NULL);
1023 }
1024
1025 if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1026 return ((*pglob->gl_opendir)(buf));
1027
1028 return (opendir(buf));
1029 }
1030
1031 static int
1032 g_lstat(Char *fn, struct stat *sb, glob_t *pglob)
1033 {
1034 char buf[MAXPATHLEN];
1035
1036 if (g_Ctoc(fn, buf, sizeof (buf)))
1037 return (-1);
1038 if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1039 return ((*pglob->gl_lstat)(buf, sb));
1040 return (lstat(buf, sb));
1041 }
1042
1043 static int
1044 g_stat(Char *fn, struct stat *sb, glob_t *pglob)
1045 {
1046 char buf[MAXPATHLEN];
1047
1048 if (g_Ctoc(fn, buf, sizeof (buf)))
1049 return (-1);
1050 if (pglob->gl_flags & GLOB_ALTDIRFUNC)
1051 return ((*pglob->gl_stat)(buf, sb));
1052 return (stat(buf, sb));
1053 }
1054
1055 static Char *
1056 g_strchr(const Char *str, int ch)
1057 {
1058 do {
1059 if (*str == ch)
1060 return ((Char *)str);
1061 } while (*str++);
1062 return (NULL);
1063 }
1064
1065 static int
1066 g_Ctoc(const Char *str, char *buf, uint_t len)
1067 {
1068
1069 while (len--) {
1070 if ((*buf++ = *str++) == EOS)
1071 return (0);
1072 }
1073 return (1);
1074 }
1075
1076 #ifdef DEBUG
1077 static void
1078 qprintf(const char *str, Char *s)
1079 {
1080 Char *p;
1081
1082 (void) printf("%s:\n", str);
1083 for (p = s; *p; p++)
1084 (void) printf("%c", CHAR(*p));
1085 (void) printf("\n");
1086 for (p = s; *p; p++)
1087 (void) printf("%c", *p & M_PROTECT ? '"' : ' ');
1088 (void) printf("\n");
1089 for (p = s; *p; p++)
1090 (void) printf("%c", ismeta(*p) ? '_' : ' ');
1091 (void) printf("\n");
1092 }
1093 #endif