1 /*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Guido van Rossum.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)glob.c 5.12 (Berkeley) 6/24/91";
34 #endif /* LIBC_SCCS and not lint */
35 /*
36 * Glob: the interface is a superset of the one defined in POSIX 1003.2,
37 * draft 9.
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_ALTNOT:
49 * Use ^ instead of ! for "not".
50 * gl_matchc:
51 * Number of matches in the current invocation of glob.
52 */
53
54 #ifdef WINNT_NATIVE
55 #pragma warning(disable:4244)
56 #endif /* WINNT_NATIVE */
57
58 #define Char __Char
59 #include "sh.h"
60 #include "glob.h"
61
62 #ifndef HAVE_MBLEN
63 #undef mblen
64 #define mblen(_s,_n) mbrlen((_s),(_n),NULL)
65 #endif
66
67 #undef Char
68 #undef QUOTE
69 #undef TILDE
70 #undef META
71 #undef ismeta
72 #undef Strchr
73
74 #ifndef S_ISDIR
75 #define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
76 #endif
77
78 #if !defined(S_ISLNK) && defined(S_IFLNK)
79 #define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
80 #endif
81
82 #if !defined(S_ISLNK) && !defined(lstat)
83 #define lstat stat
84 #endif
85
86 typedef unsigned short Char;
87
88 static int glob1 (Char *, glob_t *, int);
89 static int glob2 (struct strbuf *, const Char *, glob_t *, int);
90 static int glob3 (struct strbuf *, const Char *, const Char *,
91 const Char *, glob_t *, int);
92 static void globextend (const char *, glob_t *);
93 static int match (const char *, const Char *, const Char *,
94 int);
95 static int compare (const void *, const void *);
96 static DIR *Opendir (const char *);
97 #ifdef S_IFLNK
98 static int Lstat (const char *, struct stat *);
99 #endif
100 static int Stat (const char *, struct stat *sb);
101 static Char *Strchr (Char *, int);
102 #ifdef DEBUG
103 static void qprintf (const char *, const Char *);
104 #endif
105
106 #define DOLLAR '$'
107 #define DOT '.'
108 #define EOS '\0'
109 #define LBRACKET '['
110 #define NOT '!'
111 #define ALTNOT '^'
112 #define QUESTION '?'
113 #define QUOTE '\\'
114 #define RANGE '-'
115 #define RBRACKET ']'
116 #define SEP '/'
117 #define STAR '*'
118 #define TILDE '~'
119 #define UNDERSCORE '_'
120
121 #define M_META 0x8000
122 #define M_PROTECT 0x4000
123 #define M_MASK 0xffff
124 #define M_ASCII 0x00ff
125
126 #define LCHAR(c) ((c)&M_ASCII)
127 #define META(c) ((c)|M_META)
128 #define M_ALL META('*')
129 #define M_END META(']')
130 #define M_NOT META('!')
131 #define M_ALTNOT META('^')
132 #define M_ONE META('?')
133 #define M_RNG META('-')
134 #define M_SET META('[')
135 #define ismeta(c) (((c)&M_META) != 0)
136
137 int
globcharcoll(__Char c1,__Char c2,int cs)138 globcharcoll(__Char c1, __Char c2, int cs)
139 {
140 #if defined(NLS) && defined(LC_COLLATE) && defined(HAVE_STRCOLL)
141 # if defined(WIDE_STRINGS)
142 wchar_t s1[2], s2[2];
143
144 if (c1 == c2)
145 return (0);
146 if (cs) {
147 c1 = towlower(c1);
148 c2 = towlower(c2);
149 } else {
150 #ifndef __FreeBSD__
151 /* This should not be here, but I'll rather leave it in than engage in
152 a LC_COLLATE flamewar about a shell I don't use... */
153 if (iswlower(c1) && iswupper(c2))
154 return (1);
155 if (iswupper(c1) && iswlower(c2))
156 return (-1);
157 #endif
158 }
159 s1[0] = c1;
160 s2[0] = c2;
161 s1[1] = s2[1] = '\0';
162 return wcscoll(s1, s2);
163 # else /* not WIDE_STRINGS */
164 char s1[2], s2[2];
165
166 if (c1 == c2)
167 return (0);
168 /*
169 * From kevin lyda <kevin@suberic.net>:
170 * strcoll does not guarantee case sorting, so we pre-process now:
171 */
172 if (cs) {
173 c1 = islower(c1) ? c1 : tolower(c1);
174 c2 = islower(c2) ? c2 : tolower(c2);
175 } else {
176 if (islower(c1) && isupper(c2))
177 return (1);
178 if (isupper(c1) && islower(c2))
179 return (-1);
180 }
181 s1[0] = c1;
182 s2[0] = c2;
183 s1[1] = s2[1] = '\0';
184 return strcoll(s1, s2);
185 # endif
186 #else
187 return (c1 - c2);
188 #endif
189 }
190
191 /*
192 * Need to dodge two kernel bugs:
193 * opendir("") != opendir(".")
194 * NAMEI_BUG: on plain files trailing slashes are ignored in some kernels.
195 * POSIX specifies that they should be ignored in directories.
196 */
197
198 static DIR *
Opendir(const char * str)199 Opendir(const char *str)
200 {
201 #if defined(hpux) || defined(__hpux)
202 struct stat st;
203 #endif
204
205 if (!*str)
206 return (opendir("."));
207 #if defined(hpux) || defined(__hpux)
208 /*
209 * Opendir on some device files hangs, so avoid it
210 */
211 if (stat(str, &st) == -1 || !S_ISDIR(st.st_mode))
212 return NULL;
213 #endif
214 return opendir(str);
215 }
216
217 #ifdef S_IFLNK
218 static int
Lstat(const char * fn,struct stat * sb)219 Lstat(const char *fn, struct stat *sb)
220 {
221 int st;
222
223 st = lstat(fn, sb);
224 # ifdef NAMEI_BUG
225 if (*fn != 0 && strend(fn)[-1] == '/' && !S_ISDIR(sb->st_mode))
226 st = -1;
227 # endif /* NAMEI_BUG */
228 return st;
229 }
230 #else
231 #define Lstat Stat
232 #endif /* S_IFLNK */
233
234 static int
Stat(const char * fn,struct stat * sb)235 Stat(const char *fn, struct stat *sb)
236 {
237 int st;
238
239 st = stat(fn, sb);
240 #ifdef NAMEI_BUG
241 if (*fn != 0 && strend(fn)[-1] == '/' && !S_ISDIR(sb->st_mode))
242 st = -1;
243 #endif /* NAMEI_BUG */
244 return st;
245 }
246
247 static Char *
Strchr(Char * str,int ch)248 Strchr(Char *str, int ch)
249 {
250 do
251 if (*str == ch)
252 return (str);
253 while (*str++);
254 return (NULL);
255 }
256
257 #ifdef DEBUG
258 static void
qprintf(const char * pre,const Char * s)259 qprintf(const char *pre, const Char *s)
260 {
261 const Char *p;
262
263 xprintf("%s", pre);
264 for (p = s; *p; p++)
265 xprintf("%c", *p & 0xff);
266 xprintf("\n%s", pre);
267 for (p = s; *p; p++)
268 xprintf("%c", *p & M_PROTECT ? '"' : ' ');
269 xprintf("\n%s", pre);
270 for (p = s; *p; p++)
271 xprintf("%c", *p & M_META ? '_' : ' ');
272 xprintf("\n");
273 }
274 #endif /* DEBUG */
275
276 static int
compare(const void * p,const void * q)277 compare(const void *p, const void *q)
278 {
279 #if defined(NLS) && defined(HAVE_STRCOLL)
280 return (strcoll(*(char *const *) p, *(char *const *) q));
281 #else
282 return (strcmp(*(char *const *) p, *(char *const *) q));
283 #endif /* NLS && HAVE_STRCOLL */
284 }
285
286 /*
287 * The main glob() routine: compiles the pattern (optionally processing
288 * quotes), calls glob1() to do the real pattern matching, and finally
289 * sorts the list (unless unsorted operation is requested). Returns 0
290 * if things went well, nonzero if errors occurred. It is not an error
291 * to find no matches.
292 */
293 int
glob(const char * pattern,int flags,int (* errfunc)(const char *,int),glob_t * pglob)294 glob(const char *pattern, int flags, int (*errfunc) (const char *, int),
295 glob_t *pglob)
296 {
297 int err, oldpathc;
298 Char *bufnext, m_not;
299 const unsigned char *patnext;
300 int c, not;
301 Char *qpatnext, *patbuf;
302 int no_match;
303
304 patnext = (const unsigned char *) pattern;
305 if (!(flags & GLOB_APPEND)) {
306 pglob->gl_pathc = 0;
307 pglob->gl_pathv = NULL;
308 if (!(flags & GLOB_DOOFFS))
309 pglob->gl_offs = 0;
310 }
311 pglob->gl_flags = flags & ~GLOB_MAGCHAR;
312 pglob->gl_errfunc = errfunc;
313 oldpathc = pglob->gl_pathc;
314 pglob->gl_matchc = 0;
315
316 if (pglob->gl_flags & GLOB_ALTNOT) {
317 not = ALTNOT;
318 m_not = M_ALTNOT;
319 }
320 else {
321 not = NOT;
322 m_not = M_NOT;
323 }
324
325 patbuf = xmalloc((strlen(pattern) + 1) * sizeof(*patbuf));
326 bufnext = patbuf;
327
328 no_match = *patnext == not;
329 if (no_match)
330 patnext++;
331
332 if (flags & GLOB_QUOTE) {
333 /* Protect the quoted characters */
334 while ((c = *patnext++) != EOS) {
335 #ifdef WIDE_STRINGS
336 int len;
337
338 len = mblen((const char *)(patnext - 1), MB_LEN_MAX);
339 if (len == -1)
340 TCSH_IGNORE(mblen(NULL, 0));
341 else if (len > 1) {
342 *bufnext++ = (Char) c;
343 while (--len != 0)
344 *bufnext++ = (Char) (*patnext++ | M_PROTECT);
345 } else
346 #endif /* WIDE_STRINGS */
347 if (c == QUOTE) {
348 if ((c = *patnext++) == EOS) {
349 c = QUOTE;
350 --patnext;
351 }
352 *bufnext++ = (Char) (c | M_PROTECT);
353 }
354 else
355 *bufnext++ = (Char) c;
356 }
357 }
358 else
359 while ((c = *patnext++) != EOS)
360 *bufnext++ = (Char) c;
361 *bufnext = EOS;
362
363 bufnext = patbuf;
364 qpatnext = patbuf;
365 while ((c = *qpatnext++) != EOS) {
366 switch (c) {
367 case LBRACKET:
368 c = *qpatnext;
369 if (c == not)
370 ++qpatnext;
371 if (*qpatnext == EOS ||
372 Strchr(qpatnext + 1, RBRACKET) == NULL) {
373 *bufnext++ = LBRACKET;
374 if (c == not)
375 --qpatnext;
376 break;
377 }
378 pglob->gl_flags |= GLOB_MAGCHAR;
379 *bufnext++ = M_SET;
380 if (c == not)
381 *bufnext++ = m_not;
382 c = *qpatnext++;
383 do {
384 *bufnext++ = LCHAR(c);
385 if (*qpatnext == RANGE &&
386 (c = qpatnext[1]) != RBRACKET) {
387 *bufnext++ = M_RNG;
388 *bufnext++ = LCHAR(c);
389 qpatnext += 2;
390 }
391 } while ((c = *qpatnext++) != RBRACKET);
392 *bufnext++ = M_END;
393 break;
394 case QUESTION:
395 pglob->gl_flags |= GLOB_MAGCHAR;
396 *bufnext++ = M_ONE;
397 break;
398 case STAR:
399 pglob->gl_flags |= GLOB_MAGCHAR;
400 /* collapse adjacent stars to one [or three if globstar],
401 * to avoid exponential behavior
402 */
403 if (bufnext == patbuf || bufnext[-1] != M_ALL ||
404 ((flags & GLOB_STAR) != 0 &&
405 (bufnext - 1 == patbuf || bufnext[-2] != M_ALL ||
406 bufnext - 2 == patbuf || bufnext[-3] != M_ALL)))
407 *bufnext++ = M_ALL;
408 break;
409 default:
410 *bufnext++ = LCHAR(c);
411 break;
412 }
413 }
414 *bufnext = EOS;
415 #ifdef DEBUG
416 qprintf("patbuf=", patbuf);
417 #endif
418
419 if ((err = glob1(patbuf, pglob, no_match)) != 0) {
420 xfree(patbuf);
421 return (err);
422 }
423
424 /*
425 * If there was no match we are going to append the pattern
426 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
427 * and the pattern did not contain any magic characters
428 * GLOB_NOMAGIC is there just for compatibility with csh.
429 */
430 if (pglob->gl_pathc == oldpathc &&
431 ((flags & GLOB_NOCHECK) ||
432 ((flags & GLOB_NOMAGIC) && !(pglob->gl_flags & GLOB_MAGCHAR)))) {
433 if (!(flags & GLOB_QUOTE))
434 globextend(pattern, pglob);
435 else {
436 char *copy, *dest;
437 const char *src;
438
439 /* copy pattern, interpreting quotes */
440 copy = xmalloc(strlen(pattern) + 1);
441 dest = copy;
442 src = pattern;
443 while (*src != EOS) {
444 /* Don't interpret quotes. The spec does not say we should do */
445 if (*src == QUOTE) {
446 if (*++src == EOS)
447 --src;
448 }
449 *dest++ = *src++;
450 }
451 *dest = EOS;
452 globextend(copy, pglob);
453 xfree(copy);
454 }
455 xfree(patbuf);
456 return 0;
457 }
458 else if (!(flags & GLOB_NOSORT) && (pglob->gl_pathc != oldpathc))
459 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
460 pglob->gl_pathc - oldpathc, sizeof(char *), compare);
461 xfree(patbuf);
462 return (0);
463 }
464
465 static int
glob1(Char * pattern,glob_t * pglob,int no_match)466 glob1(Char *pattern, glob_t *pglob, int no_match)
467 {
468 struct strbuf pathbuf = strbuf_INIT;
469 int err;
470
471 /*
472 * a null pathname is invalid -- POSIX 1003.1 sect. 2.4.
473 */
474 if (*pattern == EOS)
475 return (0);
476 err = glob2(&pathbuf, pattern, pglob, no_match);
477 xfree(pathbuf.s);
478 return err;
479 }
480
481 /*
482 * functions glob2 and glob3 are mutually recursive; there is one level
483 * of recursion for each segment in the pattern that contains one or
484 * more meta characters.
485 */
486 static int
glob2(struct strbuf * pathbuf,const Char * pattern,glob_t * pglob,int no_match)487 glob2(struct strbuf *pathbuf, const Char *pattern, glob_t *pglob, int no_match)
488 {
489 struct stat sbuf;
490 int anymeta;
491 const Char *p;
492 size_t orig_len;
493
494 /*
495 * loop over pattern segments until end of pattern or until segment with
496 * meta character found.
497 */
498 anymeta = 0;
499 for (;;) {
500 if (*pattern == EOS) { /* end of pattern? */
501 strbuf_terminate(pathbuf);
502
503 if (Lstat(pathbuf->s, &sbuf))
504 return (0);
505
506 if (((pglob->gl_flags & GLOB_MARK) &&
507 pathbuf->s[pathbuf->len - 1] != SEP) &&
508 (S_ISDIR(sbuf.st_mode)
509 #ifdef S_IFLNK
510 || (S_ISLNK(sbuf.st_mode) &&
511 (Stat(pathbuf->s, &sbuf) == 0) &&
512 S_ISDIR(sbuf.st_mode))
513 #endif
514 )) {
515 strbuf_append1(pathbuf, SEP);
516 strbuf_terminate(pathbuf);
517 }
518 ++pglob->gl_matchc;
519 globextend(pathbuf->s, pglob);
520 return 0;
521 }
522
523 /* find end of next segment, tentatively copy to pathbuf */
524 p = pattern;
525 orig_len = pathbuf->len;
526 while (*p != EOS && *p != SEP) {
527 if (ismeta(*p))
528 anymeta = 1;
529 strbuf_append1(pathbuf, *p++);
530 }
531
532 if (!anymeta) { /* no expansion, do next segment */
533 pattern = p;
534 while (*pattern == SEP)
535 strbuf_append1(pathbuf, *pattern++);
536 }
537 else { /* need expansion, recurse */
538 pathbuf->len = orig_len;
539 return (glob3(pathbuf, pattern, p, pattern, pglob, no_match));
540 }
541 }
542 /* NOTREACHED */
543 }
544
545 static size_t
One_Char_mbtowc(__Char * pwc,const Char * s,size_t n)546 One_Char_mbtowc(__Char *pwc, const Char *s, size_t n)
547 {
548 #ifdef WIDE_STRINGS
549 char buf[MB_LEN_MAX], *p;
550
551 if (n > MB_LEN_MAX)
552 n = MB_LEN_MAX;
553 p = buf;
554 while (p < buf + n && (*p++ = LCHAR(*s++)) != 0)
555 ;
556 return one_mbtowc(pwc, buf, n);
557 #else
558 *pwc = *s & CHAR;
559 return 1;
560 #endif
561 }
562
563 static int
glob3(struct strbuf * pathbuf,const Char * pattern,const Char * restpattern,const Char * pglobstar,glob_t * pglob,int no_match)564 glob3(struct strbuf *pathbuf, const Char *pattern, const Char *restpattern,
565 const Char *pglobstar, glob_t *pglob, int no_match)
566 {
567 DIR *dirp;
568 struct dirent *dp;
569 struct stat sbuf;
570 int err;
571 Char m_not = (pglob->gl_flags & GLOB_ALTNOT) ? M_ALTNOT : M_NOT;
572 size_t orig_len;
573 int globstar = 0;
574 int chase_symlinks = 0;
575 const Char *termstar = NULL;
576
577 strbuf_terminate(pathbuf);
578 orig_len = pathbuf->len;
579 errno = err = 0;
580
581 while (pglobstar < restpattern) {
582 __Char wc;
583 size_t width = One_Char_mbtowc(&wc, pglobstar, MB_LEN_MAX);
584 if ((pglobstar[0] & M_MASK) == M_ALL &&
585 (pglobstar[width] & M_MASK) == M_ALL) {
586 globstar = 1;
587 chase_symlinks = (pglobstar[2 * width] & M_MASK) == M_ALL;
588 termstar = pglobstar + (2 + chase_symlinks) * width;
589 break;
590 }
591 pglobstar += width;
592 }
593
594 if (globstar) {
595 err = pglobstar==pattern && termstar==restpattern ?
596 *restpattern == EOS ?
597 glob2(pathbuf, restpattern - 1, pglob, no_match) :
598 glob2(pathbuf, restpattern + 1, pglob, no_match) :
599 glob3(pathbuf, pattern, restpattern, termstar, pglob, no_match);
600 if (err)
601 return err;
602 pathbuf->len = orig_len;
603 strbuf_terminate(pathbuf);
604 }
605
606 if (*pathbuf->s && (Lstat(pathbuf->s, &sbuf) || !S_ISDIR(sbuf.st_mode)
607 #ifdef S_IFLINK
608 && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode))
609 #endif
610 ))
611 return 0;
612
613 if (!(dirp = Opendir(pathbuf->s))) {
614 /* todo: don't call for ENOENT or ENOTDIR? */
615 if ((pglob->gl_errfunc && (*pglob->gl_errfunc) (pathbuf->s, errno)) ||
616 (pglob->gl_flags & GLOB_ERR))
617 return (GLOB_ABEND);
618 else
619 return (0);
620 }
621
622 /* search directory for matching names */
623 while ((dp = readdir(dirp)) != NULL) {
624 /* initial DOT must be matched literally */
625 if (dp->d_name[0] == DOT && *pattern != DOT)
626 if (!(pglob->gl_flags & GLOB_DOT) || !dp->d_name[1] ||
627 (dp->d_name[1] == DOT && !dp->d_name[2]))
628 continue; /*unless globdot and not . or .. */
629 pathbuf->len = orig_len;
630 strbuf_append(pathbuf, dp->d_name);
631 strbuf_terminate(pathbuf);
632
633 if (globstar) {
634 #ifdef S_IFLNK
635 if (!chase_symlinks &&
636 (Lstat(pathbuf->s, &sbuf) || S_ISLNK(sbuf.st_mode)))
637 continue;
638 #endif
639 if (match(pathbuf->s + orig_len, pattern, termstar,
640 (int)m_not) == no_match)
641 continue;
642 strbuf_append1(pathbuf, SEP);
643 strbuf_terminate(pathbuf);
644 if ((err = glob2(pathbuf, pglobstar, pglob, no_match)) != 0)
645 break;
646 } else {
647 if (match(pathbuf->s + orig_len, pattern, restpattern,
648 (int) m_not) == no_match)
649 continue;
650 if ((err = glob2(pathbuf, restpattern, pglob, no_match)) != 0)
651 break;
652 }
653 }
654 /* todo: check error from readdir? */
655 closedir(dirp);
656 return (err);
657 }
658
659
660 /*
661 * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
662 * add the new item, and update gl_pathc.
663 *
664 * This assumes the BSD realloc, which only copies the block when its size
665 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
666 * behavior.
667 *
668 * Return 0 if new item added, error code if memory couldn't be allocated.
669 *
670 * Invariant of the glob_t structure:
671 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
672 * gl_pathv points to (gl_offs + gl_pathc + 1) items.
673 */
674 static void
globextend(const char * path,glob_t * pglob)675 globextend(const char *path, glob_t *pglob)
676 {
677 char **pathv;
678 int i;
679 size_t newsize;
680
681 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
682 pathv = xrealloc(pglob->gl_pathv, newsize);
683
684 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
685 /* first time around -- clear initial gl_offs items */
686 pathv += pglob->gl_offs;
687 for (i = pglob->gl_offs; --i >= 0;)
688 *--pathv = NULL;
689 }
690 pglob->gl_pathv = pathv;
691
692 pathv[pglob->gl_offs + pglob->gl_pathc++] = strsave(path);
693 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
694 }
695
696 /*
697 * pattern matching function for filenames.
698 */
699 static int
match(const char * name,const Char * pat,const Char * patend,int m_not)700 match(const char *name, const Char *pat, const Char *patend, int m_not)
701 {
702 int ok, negate_range;
703 const Char *patNext;
704 const char *nameNext, *nameStart, *nameEnd;
705 Char c;
706
707 patNext = pat;
708 nameStart = nameNext = name;
709 nameEnd = NULL;
710
711 while (pat < patend || *name) {
712 size_t lwk, pwk;
713 __Char wc, wk, wc1;
714
715 c = *pat; /* Only for M_MASK bits */
716 if (*name == EOS)
717 nameEnd = name;
718
719 pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
720 lwk = one_mbtowc(&wk, name, MB_LEN_MAX);
721 switch (c & M_MASK) {
722 case M_ALL:
723 while ((*(pat + pwk) & M_MASK) == M_ALL) {
724 pat += pwk;
725 pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
726 }
727 patNext = pat;
728 nameNext = name + lwk;
729 pat += pwk;
730 continue;
731 case M_ONE:
732 if (*name == EOS)
733 break;
734 name += lwk;
735 pat += pwk;
736 continue;
737 case M_SET:
738 ok = 0;
739 if (*name == EOS)
740 break;
741 pat += pwk;
742 pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
743 name += lwk;
744 if ((negate_range = ((*pat & M_MASK) == m_not)) != 0) {
745 pat += pwk;
746 pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
747 }
748 wc1 = wc;
749 while ((*pat & M_MASK) != M_END) {
750 if ((*pat & M_MASK) == M_RNG) {
751 __Char wc2;
752
753 pat += pwk;
754 pwk = One_Char_mbtowc(&wc2, pat, MB_LEN_MAX);
755 if (globcharcoll(wc1, wk, 0) <= 0 &&
756 globcharcoll(wk, wc2, 0) <= 0)
757 ok = 1;
758 } else if (wc == wk)
759 ok = 1;
760 pat += pwk;
761 wc1 = wc;
762 pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
763 }
764 pat += pwk;
765 pwk = One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
766 if (ok == negate_range)
767 break;
768 continue;
769 default:
770 if (*name == EOS || samecase(wk) != samecase(wc))
771 break;
772 name += lwk;
773 pat += pwk;
774 continue;
775 }
776 if (nameNext != nameStart
777 && (nameEnd == NULL || nameNext <= nameEnd)) {
778 pat = patNext;
779 name = nameNext;
780 continue;
781 }
782 return 0;
783 }
784 return 1;
785 }
786
787 /* free allocated data belonging to a glob_t structure */
788 void
globfree(glob_t * pglob)789 globfree(glob_t *pglob)
790 {
791 int i;
792 char **pp;
793
794 if (pglob->gl_pathv != NULL) {
795 pp = pglob->gl_pathv + pglob->gl_offs;
796 for (i = pglob->gl_pathc; i--; ++pp)
797 if (*pp)
798 xfree(*pp), *pp = NULL;
799 xfree(pglob->gl_pathv), pglob->gl_pathv = NULL;
800 }
801 }
802