xref: /PHP-5.6/win32/glob.c (revision 8c6e8e78)
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  * 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. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by the University of
19  *	California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 /* $Id$ */
38 
39 /*
40  * glob(3) -- a superset of the one defined in POSIX 1003.2.
41  *
42  * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
43  *
44  * Optional extra services, controlled by flags not defined by POSIX:
45  *
46  * GLOB_QUOTE:
47  *	Escaping convention: \ inhibits any special meaning the following
48  *	character might have (except \ at end of string is retained).
49  * GLOB_MAGCHAR:
50  *	Set in gl_flags if pattern contained a globbing character.
51  * GLOB_NOMAGIC:
52  *	Same as GLOB_NOCHECK, but it will only append pattern if it did
53  *	not contain any magic characters.  [Used in csh style globbing]
54  * GLOB_ALTDIRFUNC:
55  *	Use alternately specified directory access functions.
56  * GLOB_TILDE:
57  *	expand ~user/foo to the /home/dir/of/user/foo
58  * GLOB_BRACE:
59  *	expand {1,2}{a,b} to 1a 1b 2a 2b
60  * gl_matchc:
61  *	Number of matches in the current invocation of glob.
62  */
63 #ifdef PHP_WIN32
64 #if _MSC_VER < 1800
65 # define _POSIX_
66 # include <limits.h>
67 # undef _POSIX_
68 #else
69 /* Visual Studio 2013 removed all the _POSIX_ defines, but we depend on some */
70 # ifndef ARG_MAX
71 #  define ARG_MAX 14500
72 # endif
73 #endif
74 #ifndef S_ISDIR
75 #define S_ISDIR(m) (((m) & _S_IFDIR) == _S_IFDIR)
76 #endif
77 #ifndef S_ISLNK
78 #define S_ISLNK(m) (0)
79 #endif
80 #endif
81 
82 #include "php.h"
83 #include <sys/stat.h>
84 
85 #include <ctype.h>
86 #ifndef PHP_WIN32
87 #include <sys/param.h>
88 #include <dirent.h>
89 #include <pwd.h>
90 #include <unistd.h>
91 #endif
92 #include <errno.h>
93 #include "glob.h"
94 #include <stdio.h>
95 #include <stdlib.h>
96 #include <string.h>
97 
98 #define	DOLLAR		'$'
99 #define	DOT		'.'
100 #define	EOS		'\0'
101 #define	LBRACKET	'['
102 #define	NOT		'!'
103 #define	QUESTION	'?'
104 #define	QUOTE		'\\'
105 #define	RANGE		'-'
106 #define	RBRACKET	']'
107 #define	SEP		DEFAULT_SLASH
108 #define	STAR		'*'
109 #define	TILDE		'~'
110 #define	UNDERSCORE	'_'
111 #define	LBRACE		'{'
112 #define	RBRACE		'}'
113 #define	SLASH		'/'
114 #define	COMMA		','
115 
116 #ifndef DEBUG
117 
118 #define	M_QUOTE		0x8000
119 #define	M_PROTECT	0x4000
120 #define	M_MASK		0xffff
121 #define	M_ASCII		0x00ff
122 
123 typedef u_short Char;
124 
125 #else
126 
127 #define	M_QUOTE		0x80
128 #define	M_PROTECT	0x40
129 #define	M_MASK		0xff
130 #define	M_ASCII		0x7f
131 
132 typedef char Char;
133 
134 #endif
135 
136 
137 #define	CHAR(c)		((Char)((c)&M_ASCII))
138 #define	META(c)		((Char)((c)|M_QUOTE))
139 #define	M_ALL		META('*')
140 #define	M_END		META(']')
141 #define	M_NOT		META('!')
142 #define	M_ONE		META('?')
143 #define	M_RNG		META('-')
144 #define	M_SET		META('[')
145 #define	ismeta(c)	(((c)&M_QUOTE) != 0)
146 
147 static int	 compare(const void *, const void *);
148 static int	 g_Ctoc(const Char *, char *, u_int);
149 static int	 g_lstat(Char *, struct stat *, glob_t *);
150 static DIR	*g_opendir(Char *, glob_t *);
151 static Char	*g_strchr(Char *, int);
152 static int	 g_stat(Char *, struct stat *, glob_t *);
153 static int	 glob0(const Char *, glob_t *);
154 static int	 glob1(Char *, Char *, glob_t *, size_t *);
155 static int	 glob2(Char *, Char *, Char *, Char *, Char *, Char *,
156 				glob_t *, size_t *);
157 static int	 glob3(Char *, Char *, Char *, Char *, Char *, Char *,
158 				Char *, Char *, glob_t *, size_t *);
159 static int	 globextend(const Char *, glob_t *, size_t *);
160 static const Char *globtilde(const Char *, Char *, size_t, glob_t *);
161 static int	 globexp1(const Char *, glob_t *);
162 static int	 globexp2(const Char *, const Char *, glob_t *, int *);
163 static int	 match(Char *, Char *, Char *);
164 #ifdef DEBUG
165 static void	 qprintf(const char *, Char *);
166 #endif
167 
168 PHPAPI int
glob(pattern,flags,errfunc,pglob)169 glob(pattern, flags, errfunc, pglob)
170 	const char *pattern;
171 	int flags, (*errfunc)(const char *, int);
172 	glob_t *pglob;
173 {
174 	const u_char *patnext;
175 	int c;
176 	Char *bufnext, *bufend, patbuf[MAXPATHLEN];
177 
178 #ifdef PHP_WIN32
179 	/* Force skipping escape sequences on windows
180 	 * due to the ambiguity with path backslashes
181 	 */
182 	flags |= GLOB_NOESCAPE;
183 #endif
184 
185 	patnext = (u_char *) pattern;
186 	if (!(flags & GLOB_APPEND)) {
187 		pglob->gl_pathc = 0;
188 		pglob->gl_pathv = NULL;
189 		if (!(flags & GLOB_DOOFFS))
190 			pglob->gl_offs = 0;
191 	}
192 	pglob->gl_flags = flags & ~GLOB_MAGCHAR;
193 	pglob->gl_errfunc = errfunc;
194 	pglob->gl_matchc = 0;
195 
196 	bufnext = patbuf;
197 	bufend = bufnext + MAXPATHLEN - 1;
198 	if (flags & GLOB_NOESCAPE)
199 		while (bufnext < bufend && (c = *patnext++) != EOS)
200 			*bufnext++ = c;
201 	else {
202 		/* Protect the quoted characters. */
203 		while (bufnext < bufend && (c = *patnext++) != EOS)
204 			if (c == QUOTE) {
205 				if ((c = *patnext++) == EOS) {
206 					c = QUOTE;
207 					--patnext;
208 				}
209 				*bufnext++ = c | M_PROTECT;
210 			} else
211 				*bufnext++ = c;
212 	}
213 	*bufnext = EOS;
214 
215 	if (flags & GLOB_BRACE)
216 		return globexp1(patbuf, pglob);
217 	else
218 		return glob0(patbuf, pglob);
219 }
220 
221 /*
222  * Expand recursively a glob {} pattern. When there is no more expansion
223  * invoke the standard globbing routine to glob the rest of the magic
224  * characters
225  */
226 static int
globexp1(pattern,pglob)227 globexp1(pattern, pglob)
228 	const Char *pattern;
229 	glob_t *pglob;
230 {
231 	const Char* ptr = pattern;
232 	int rv;
233 
234 	/* Protect a single {}, for find(1), like csh */
235 	if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
236 		return glob0(pattern, pglob);
237 
238 	while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL)
239 		if (!globexp2(ptr, pattern, pglob, &rv))
240 			return rv;
241 
242 	return glob0(pattern, pglob);
243 }
244 
245 
246 /*
247  * Recursive brace globbing helper. Tries to expand a single brace.
248  * If it succeeds then it invokes globexp1 with the new pattern.
249  * If it fails then it tries to glob the rest of the pattern and returns.
250  */
251 static int
globexp2(ptr,pattern,pglob,rv)252 globexp2(ptr, pattern, pglob, rv)
253 	const Char *ptr, *pattern;
254 	glob_t *pglob;
255 	int *rv;
256 {
257 	int     i;
258 	Char   *lm, *ls;
259 	const Char *pe, *pm, *pl;
260 	Char    patbuf[MAXPATHLEN];
261 
262 	/* copy part up to the brace */
263 	for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
264 		;
265 	*lm = EOS;
266 	ls = lm;
267 
268 	/* Find the balanced brace */
269 	for (i = 0, pe = ++ptr; *pe; pe++)
270 		if (*pe == LBRACKET) {
271 			/* Ignore everything between [] */
272 			for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
273 				;
274 			if (*pe == EOS) {
275 				/*
276 				 * We could not find a matching RBRACKET.
277 				 * Ignore and just look for RBRACE
278 				 */
279 				pe = pm;
280 			}
281 		} else if (*pe == LBRACE)
282 			i++;
283 		else if (*pe == RBRACE) {
284 			if (i == 0)
285 				break;
286 			i--;
287 		}
288 
289 	/* Non matching braces; just glob the pattern */
290 	if (i != 0 || *pe == EOS) {
291 		*rv = glob0(patbuf, pglob);
292 		return 0;
293 	}
294 
295 	for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
296 		const Char *pb;
297 
298 		switch (*pm) {
299 		case LBRACKET:
300 			/* Ignore everything between [] */
301 			for (pb = pm++; *pm != RBRACKET && *pm != EOS; pm++)
302 				;
303 			if (*pm == EOS) {
304 				/*
305 				 * We could not find a matching RBRACKET.
306 				 * Ignore and just look for RBRACE
307 				 */
308 				pm = pb;
309 			}
310 			break;
311 
312 		case LBRACE:
313 			i++;
314 			break;
315 
316 		case RBRACE:
317 			if (i) {
318 				i--;
319 				break;
320 			}
321 			/* FALLTHROUGH */
322 		case COMMA:
323 			if (i && *pm == COMMA)
324 				break;
325 			else {
326 				/* Append the current string */
327 				for (lm = ls; (pl < pm); *lm++ = *pl++)
328 					;
329 
330 				/*
331 				 * Append the rest of the pattern after the
332 				 * closing brace
333 				 */
334 				for (pl = pe + 1; (*lm++ = *pl++) != EOS; )
335 					;
336 
337 				/* Expand the current pattern */
338 #ifdef DEBUG
339 				qprintf("globexp2:", patbuf);
340 #endif
341 				*rv = globexp1(patbuf, pglob);
342 
343 				/* move after the comma, to the next string */
344 				pl = pm + 1;
345 			}
346 			break;
347 
348 		default:
349 			break;
350 		}
351 	}
352 	*rv = 0;
353 	return 0;
354 }
355 
356 
357 
358 /*
359  * expand tilde from the passwd file.
360  */
361 static const Char *
globtilde(pattern,patbuf,patbuf_len,pglob)362 globtilde(pattern, patbuf, patbuf_len, pglob)
363 	const Char *pattern;
364 	Char *patbuf;
365 	size_t patbuf_len;
366 	glob_t *pglob;
367 {
368 #ifndef PHP_WIN32
369 	struct passwd *pwd;
370 #endif
371 	char *h;
372 	const Char *p;
373 	Char *b, *eb;
374 
375 	if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
376 		return pattern;
377 
378 	/* Copy up to the end of the string or / */
379 	eb = &patbuf[patbuf_len - 1];
380 	for (p = pattern + 1, h = (char *) patbuf;
381 		h < (char *)eb && *p && *p != SLASH; *h++ = (char) *p++)
382 		;
383 
384 	*h = EOS;
385 
386 #if 0
387 	if (h == (char *)eb)
388 		return what;
389 #endif
390 
391 	if (((char *) patbuf)[0] == EOS) {
392 		/*
393 		 * handle a plain ~ or ~/ by expanding $HOME
394 		 * first and then trying the password file
395 		 */
396 		if ((h = getenv("HOME")) == NULL) {
397 #ifndef PHP_WIN32
398 			if ((pwd = getpwuid(getuid())) == NULL)
399 				return pattern;
400 			else
401 				h = pwd->pw_dir;
402 #else
403 			return pattern;
404 #endif
405 		}
406 	} else {
407 		/*
408 		 * Expand a ~user
409 		 */
410 #ifndef PHP_WIN32
411 		if ((pwd = getpwnam((char*) patbuf)) == NULL)
412 			return pattern;
413 		else
414 			h = pwd->pw_dir;
415 #else
416 		return pattern;
417 #endif
418 	}
419 
420 	/* Copy the home directory */
421 	for (b = patbuf; b < eb && *h; *b++ = *h++)
422 		;
423 
424 	/* Append the rest of the pattern */
425 	while (b < eb && (*b++ = *p++) != EOS)
426 		;
427 	*b = EOS;
428 
429 	return patbuf;
430 }
431 
432 
433 /*
434  * The main glob() routine: compiles the pattern (optionally processing
435  * quotes), calls glob1() to do the real pattern matching, and finally
436  * sorts the list (unless unsorted operation is requested).  Returns 0
437  * if things went well, nonzero if errors occurred.  It is not an error
438  * to find no matches.
439  */
440 static int
glob0(pattern,pglob)441 glob0(pattern, pglob)
442 	const Char *pattern;
443 	glob_t *pglob;
444 {
445 	const Char *qpatnext;
446 	int c, err, oldpathc;
447 	Char *bufnext, patbuf[MAXPATHLEN];
448 	size_t limit = 0;
449 
450 	qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob);
451 	oldpathc = pglob->gl_pathc;
452 	bufnext = patbuf;
453 
454 	/* We don't need to check for buffer overflow any more. */
455 	while ((c = *qpatnext++) != EOS) {
456 		switch (c) {
457 		case LBRACKET:
458 			c = *qpatnext;
459 			if (c == NOT)
460 				++qpatnext;
461 			if (*qpatnext == EOS ||
462 				g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) {
463 				*bufnext++ = LBRACKET;
464 				if (c == NOT)
465 					--qpatnext;
466 				break;
467 			}
468 			*bufnext++ = M_SET;
469 			if (c == NOT)
470 				*bufnext++ = M_NOT;
471 			c = *qpatnext++;
472 			do {
473 				*bufnext++ = CHAR(c);
474 				if (*qpatnext == RANGE &&
475 					(c = qpatnext[1]) != RBRACKET) {
476 					*bufnext++ = M_RNG;
477 					*bufnext++ = CHAR(c);
478 					qpatnext += 2;
479 				}
480 			} while ((c = *qpatnext++) != RBRACKET);
481 			pglob->gl_flags |= GLOB_MAGCHAR;
482 			*bufnext++ = M_END;
483 			break;
484 		case QUESTION:
485 			pglob->gl_flags |= GLOB_MAGCHAR;
486 			*bufnext++ = M_ONE;
487 			break;
488 		case STAR:
489 			pglob->gl_flags |= GLOB_MAGCHAR;
490 			/* collapse adjacent stars to one,
491 			 * to avoid exponential behavior
492 			 */
493 			if (bufnext == patbuf || bufnext[-1] != M_ALL)
494 				*bufnext++ = M_ALL;
495 			break;
496 		default:
497 			*bufnext++ = CHAR(c);
498 			break;
499 		}
500 	}
501 	*bufnext = EOS;
502 #ifdef DEBUG
503 	qprintf("glob0:", patbuf);
504 #endif
505 
506 	if ((err = glob1(patbuf, patbuf+MAXPATHLEN-1, pglob, &limit)) != 0)
507 		return(err);
508 
509 	/*
510 	 * If there was no match we are going to append the pattern
511 	 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
512 	 * and the pattern did not contain any magic characters
513 	 * GLOB_NOMAGIC is there just for compatibility with csh.
514 	 */
515 	if (pglob->gl_pathc == oldpathc) {
516 		if ((pglob->gl_flags & GLOB_NOCHECK) ||
517 			((pglob->gl_flags & GLOB_NOMAGIC) &&
518 			!(pglob->gl_flags & GLOB_MAGCHAR)))
519 			return(globextend(pattern, pglob, &limit));
520 		else
521 			return(GLOB_NOMATCH);
522 	}
523 	if (!(pglob->gl_flags & GLOB_NOSORT))
524 		qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
525 			pglob->gl_pathc - oldpathc, sizeof(char *), compare);
526 	return(0);
527 }
528 
529 static int
compare(const void * p,const void * q)530 compare(const void *p, const void *q)
531 {
532 	return(strcmp(*(char **)p, *(char **)q));
533 }
534 
535 static int
glob1(pattern,pattern_last,pglob,limitp)536 glob1(pattern, pattern_last, pglob, limitp)
537 	Char *pattern, *pattern_last;
538 	glob_t *pglob;
539 	size_t *limitp;
540 {
541 	Char pathbuf[MAXPATHLEN];
542 
543 	/* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
544 	if (*pattern == EOS)
545 		return(0);
546 	return(glob2(pathbuf, pathbuf+MAXPATHLEN-1,
547 		pathbuf, pathbuf+MAXPATHLEN-1,
548 		pattern, pattern_last, pglob, limitp));
549 }
550 
551 /*
552  * The functions glob2 and glob3 are mutually recursive; there is one level
553  * of recursion for each segment in the pattern that contains one or more
554  * meta characters.
555  */
556 static int
glob2(pathbuf,pathbuf_last,pathend,pathend_last,pattern,pattern_last,pglob,limitp)557 glob2(pathbuf, pathbuf_last, pathend, pathend_last, pattern,
558 		pattern_last, pglob, limitp)
559 	Char *pathbuf, *pathbuf_last, *pathend, *pathend_last;
560 	Char *pattern, *pattern_last;
561 	glob_t *pglob;
562 	size_t *limitp;
563 {
564 	struct stat sb;
565 	Char *p, *q;
566 	int anymeta;
567 
568 	/*
569 	 * Loop over pattern segments until end of pattern or until
570 	 * segment with meta character found.
571 	 */
572 	for (anymeta = 0;;) {
573 		if (*pattern == EOS) {		/* End of pattern? */
574 			*pathend = EOS;
575 			if (g_lstat(pathbuf, &sb, pglob))
576 				return(0);
577 
578 			if (((pglob->gl_flags & GLOB_MARK) &&
579 				!IS_SLASH(pathend[-1])) && (S_ISDIR(sb.st_mode) ||
580 				(S_ISLNK(sb.st_mode) &&
581 				(g_stat(pathbuf, &sb, pglob) == 0) &&
582 				S_ISDIR(sb.st_mode)))) {
583 				if (pathend+1 > pathend_last)
584 					return (1);
585 				*pathend++ = SEP;
586 				*pathend = EOS;
587 			}
588 			++pglob->gl_matchc;
589 			return(globextend(pathbuf, pglob, limitp));
590 		}
591 
592 		/* Find end of next segment, copy tentatively to pathend. */
593 		q = pathend;
594 		p = pattern;
595 		while (*p != EOS && !IS_SLASH(*p)) {
596 			if (ismeta(*p))
597 				anymeta = 1;
598 			if (q+1 > pathend_last)
599 				return (1);
600 			*q++ = *p++;
601 		}
602 
603 		if (!anymeta) {		/* No expansion, do next segment. */
604 			pathend = q;
605 			pattern = p;
606 			while (IS_SLASH(*pattern)) {
607 				if (pathend+1 > pathend_last)
608 					return (1);
609 				*pathend++ = *pattern++;
610 			}
611 		} else
612 			/* Need expansion, recurse. */
613 			return(glob3(pathbuf, pathbuf_last, pathend,
614 				pathend_last, pattern, pattern_last,
615 				p, pattern_last, pglob, limitp));
616 	}
617 	/* NOTREACHED */
618 }
619 
620 static int
glob3(pathbuf,pathbuf_last,pathend,pathend_last,pattern,pattern_last,restpattern,restpattern_last,pglob,limitp)621 glob3(pathbuf, pathbuf_last, pathend, pathend_last, pattern, pattern_last,
622 	restpattern, restpattern_last, pglob, limitp)
623 	Char *pathbuf, *pathbuf_last, *pathend, *pathend_last;
624 	Char *pattern, *pattern_last, *restpattern, *restpattern_last;
625 	glob_t *pglob;
626 	size_t *limitp;
627 {
628 	register struct dirent *dp;
629 	DIR *dirp;
630 	int err;
631 	char buf[MAXPATHLEN];
632 
633 	/*
634 	 * The readdirfunc declaration can't be prototyped, because it is
635 	 * assigned, below, to two functions which are prototyped in glob.h
636 	 * and dirent.h as taking pointers to differently typed opaque
637 	 * structures.
638 	 */
639 	struct dirent *(*readdirfunc)();
640 
641 	if (pathend > pathend_last)
642 		return (1);
643 	*pathend = EOS;
644 	errno = 0;
645 
646 	if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
647 		/* TODO: don't call for ENOENT or ENOTDIR? */
648 		if (pglob->gl_errfunc) {
649 			if (g_Ctoc(pathbuf, buf, sizeof(buf)))
650 				return(GLOB_ABORTED);
651 			if (pglob->gl_errfunc(buf, errno) ||
652 				pglob->gl_flags & GLOB_ERR)
653 				return(GLOB_ABORTED);
654 		}
655 		return(0);
656 	}
657 
658 	err = 0;
659 
660 	/* Search directory for matching names. */
661 	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
662 		readdirfunc = pglob->gl_readdir;
663 	else
664 		readdirfunc = readdir;
665 	while ((dp = (*readdirfunc)(dirp))) {
666 		register u_char *sc;
667 		register Char *dc;
668 
669 		/* Initial DOT must be matched literally. */
670 		if (dp->d_name[0] == DOT && *pattern != DOT)
671 			continue;
672 		dc = pathend;
673 		sc = (u_char *) dp->d_name;
674 		while (dc < pathend_last && (*dc++ = *sc++) != EOS)
675 			;
676 		if (dc >= pathend_last) {
677 			*dc = EOS;
678 			err = 1;
679 			break;
680 		}
681 
682 		if (!match(pathend, pattern, restpattern)) {
683 			*pathend = EOS;
684 			continue;
685 		}
686 		err = glob2(pathbuf, pathbuf_last, --dc, pathend_last,
687 			restpattern, restpattern_last, pglob, limitp);
688 		if (err)
689 			break;
690 	}
691 
692 	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
693 		(*pglob->gl_closedir)(dirp);
694 	else
695 		closedir(dirp);
696 	return(err);
697 }
698 
699 
700 /*
701  * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
702  * add the new item, and update gl_pathc.
703  *
704  * This assumes the BSD realloc, which only copies the block when its size
705  * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
706  * behavior.
707  *
708  * Return 0 if new item added, error code if memory couldn't be allocated.
709  *
710  * Invariant of the glob_t structure:
711  *	Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
712  *	gl_pathv points to (gl_offs + gl_pathc + 1) items.
713  */
714 static int
globextend(path,pglob,limitp)715 globextend(path, pglob, limitp)
716 	const Char *path;
717 	glob_t *pglob;
718 	size_t *limitp;
719 {
720 	register char **pathv;
721 	register int i;
722 	u_int newsize, len;
723 	char *copy;
724 	const Char *p;
725 
726 	newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
727 	pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) :
728 		malloc(newsize);
729 	if (pathv == NULL) {
730 		if (pglob->gl_pathv) {
731 			free(pglob->gl_pathv);
732 			pglob->gl_pathv = NULL;
733 		}
734 		return(GLOB_NOSPACE);
735 	}
736 
737 	if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
738 		/* first time around -- clear initial gl_offs items */
739 		pathv += pglob->gl_offs;
740 		for (i = pglob->gl_offs; --i >= 0; )
741 			*--pathv = NULL;
742 	}
743 	pglob->gl_pathv = pathv;
744 
745 	for (p = path; *p++;)
746 		;
747 	len = (size_t)(p - path);
748 	*limitp += len;
749 	if ((copy = malloc(len)) != NULL) {
750 		if (g_Ctoc(path, copy, len)) {
751 			free(copy);
752 			return(GLOB_NOSPACE);
753 		}
754 		pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
755 	}
756 	pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
757 
758 	if ((pglob->gl_flags & GLOB_LIMIT) &&
759 		newsize + *limitp >= ARG_MAX) {
760 		errno = 0;
761 		return(GLOB_NOSPACE);
762 	}
763 
764 	return(copy == NULL ? GLOB_NOSPACE : 0);
765 }
766 
767 
768 /*
769  * pattern matching function for filenames.  Each occurrence of the *
770  * pattern causes a recursion level.
771  */
772 static int
match(name,pat,patend)773 match(name, pat, patend)
774 	register Char *name, *pat, *patend;
775 {
776 	int ok, negate_range;
777 	Char c, k;
778 
779 	while (pat < patend) {
780 		c = *pat++;
781 		switch (c & M_MASK) {
782 		case M_ALL:
783 			if (pat == patend)
784 				return(1);
785 			do
786 				if (match(name, pat, patend))
787 					return(1);
788 			while (*name++ != EOS)
789 				;
790 			return(0);
791 		case M_ONE:
792 			if (*name++ == EOS)
793 				return(0);
794 			break;
795 		case M_SET:
796 			ok = 0;
797 			if ((k = *name++) == EOS)
798 				return(0);
799 			if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
800 				++pat;
801 			while (((c = *pat++) & M_MASK) != M_END)
802 				if ((*pat & M_MASK) == M_RNG) {
803 					if (c <= k && k <= pat[1])
804 						ok = 1;
805 					pat += 2;
806 				} else if (c == k)
807 					ok = 1;
808 			if (ok == negate_range)
809 				return(0);
810 			break;
811 		default:
812 			if (*name++ != c)
813 				return(0);
814 			break;
815 		}
816 	}
817 	return(*name == EOS);
818 }
819 
820 /* Free allocated data belonging to a glob_t structure. */
821 PHPAPI void
globfree(pglob)822 globfree(pglob)
823 	glob_t *pglob;
824 {
825 	register int i;
826 	register char **pp;
827 
828 	if (pglob->gl_pathv != NULL) {
829 		pp = pglob->gl_pathv + pglob->gl_offs;
830 		for (i = pglob->gl_pathc; i--; ++pp)
831 			if (*pp)
832 				free(*pp);
833 		free(pglob->gl_pathv);
834 		pglob->gl_pathv = NULL;
835 	}
836 }
837 
838 static DIR *
g_opendir(str,pglob)839 g_opendir(str, pglob)
840 	register Char *str;
841 	glob_t *pglob;
842 {
843 	char buf[MAXPATHLEN];
844 
845 	if (!*str)
846 		strlcpy(buf, ".", sizeof buf);
847 	else {
848 		if (g_Ctoc(str, buf, sizeof(buf)))
849 			return(NULL);
850 	}
851 
852 	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
853 		return((*pglob->gl_opendir)(buf));
854 
855 	return(opendir(buf));
856 }
857 
858 static int
g_lstat(fn,sb,pglob)859 g_lstat(fn, sb, pglob)
860 	register Char *fn;
861 	struct stat *sb;
862 	glob_t *pglob;
863 {
864 	char buf[MAXPATHLEN];
865 
866 	if (g_Ctoc(fn, buf, sizeof(buf)))
867 		return(-1);
868 	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
869 		return((*pglob->gl_lstat)(buf, sb));
870 	return(php_sys_lstat(buf, sb));
871 }
872 
873 static int
g_stat(fn,sb,pglob)874 g_stat(fn, sb, pglob)
875 	register Char *fn;
876 	struct stat *sb;
877 	glob_t *pglob;
878 {
879 	char buf[MAXPATHLEN];
880 
881 	if (g_Ctoc(fn, buf, sizeof(buf)))
882 		return(-1);
883 	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
884 		return((*pglob->gl_stat)(buf, sb));
885 	return(php_sys_stat(buf, sb));
886 }
887 
888 static Char *
g_strchr(str,ch)889 g_strchr(str, ch)
890 	Char *str;
891 	int ch;
892 {
893 	do {
894 		if (*str == ch)
895 			return (str);
896 	} while (*str++);
897 	return (NULL);
898 }
899 
900 static int
g_Ctoc(str,buf,len)901 g_Ctoc(str, buf, len)
902 	register const Char *str;
903 	char *buf;
904 	u_int len;
905 {
906 
907 	while (len--) {
908 		if ((*buf++ = (char) *str++) == EOS)
909 			return (0);
910 	}
911 	return (1);
912 }
913 
914 #ifdef DEBUG
915 static void
qprintf(str,s)916 qprintf(str, s)
917 	const char *str;
918 	register Char *s;
919 {
920 	register Char *p;
921 
922 	(void)printf("%s:\n", str);
923 	for (p = s; *p; p++)
924 		(void)printf("%c", CHAR(*p));
925 	(void)printf("\n");
926 	for (p = s; *p; p++)
927 		(void)printf("%c", *p & M_PROTECT ? '"' : ' ');
928 	(void)printf("\n");
929 	for (p = s; *p; p++)
930 		(void)printf("%c", ismeta(*p) ? '_' : ' ');
931 	(void)printf("\n");
932 }
933 #endif
934