ladybird/Ports/mandoc/patches/add-compat_glob.patch

--- mandoc-1.14.5/compat_glob.c.orig	Sat Jan 25 20:23:13 2020
+++ mandoc-1.14.5/compat_glob.c	Sat Jan 25 20:22:56 2020
@@ -0,0 +1,1174 @@
+/*	$NetBSD: glob.c,v 1.39 2019/05/29 01:21:33 christos Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Guido van Rossum.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)glob.c	8.3 (Berkeley) 10/13/93";
+#else
+__RCSID("$NetBSD: glob.c,v 1.39 2019/05/29 01:21:33 christos Exp $");
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * glob(3) -- a superset of the one defined in POSIX 1003.2.
+ *
+ * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
+ *
+ * Optional extra services, controlled by flags not defined by POSIX:
+ *
+ * GLOB_MAGCHAR:
+ *	Set in gl_flags if pattern contained a globbing character.
+ * GLOB_NOMAGIC:
+ *	Same as GLOB_NOCHECK, but it will only append pattern if it did
+ *	not contain any magic characters.  [Used in csh style globbing]
+ * GLOB_ALTDIRFUNC:
+ *	Use alternately specified directory access functions.
+ * GLOB_TILDE:
+ *	expand ~user/foo to the /home/dir/of/user/foo
+ * GLOB_BRACE:
+ *	expand {1,2}{a,b} to 1a 1b 2a 2b 
+ * GLOB_PERIOD:
+ *	allow metacharacters to match leading dots in filenames.
+ * GLOB_NO_DOTDIRS:
+ *	. and .. are hidden from wildcards, even if GLOB_PERIOD is set.
+ * gl_matchc:
+ *	Number of matches in the current invocation of glob.
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "glob.h"
+
+#define NO_GETPW_R
+
+#define	GLOB_LIMIT_STRING	524288	/* number of readdirs */
+#define	GLOB_LIMIT_STAT		128	/* number of stat system calls */
+#define	GLOB_LIMIT_READDIR	65536	/* total buffer size of path strings */
+#define	GLOB_LIMIT_PATH		1024	/* number of path elements */
+#define GLOB_LIMIT_BRACE	128	/* Number of brace calls */
+
+struct glob_limit {
+	size_t l_string;
+	size_t l_stat;	
+	size_t l_readdir;	
+	size_t l_brace;
+};
+
+/*
+ * XXX: For NetBSD 1.4.x compatibility. (kill me l8r)
+ */
+#ifndef _DIAGASSERT
+#define _DIAGASSERT(a)
+#endif
+
+#define	DOLLAR		'$'
+#define	DOT		'.'
+#define	EOS		'\0'
+#define	LBRACKET	'['
+#define	NOT		'!'
+#define	QUESTION	'?'
+#define	QUOTE		'\\'
+#define	RANGE		'-'
+#define	RBRACKET	']'
+#define	SEP		'/'
+#define	STAR		'*'
+#define	TILDE		'~'
+#define	UNDERSCORE	'_'
+#define	LBRACE		'{'
+#define	RBRACE		'}'
+#define	SLASH		'/'
+#define	COMMA		','
+
+#ifndef USE_8BIT_CHARS
+
+#define	M_QUOTE		0x8000
+#define	M_PROTECT	0x4000
+#define	M_MASK		0xffff
+#define	M_ASCII		0x00ff
+
+typedef unsigned short Char;
+
+#else
+
+#define	M_QUOTE		(Char)0x80
+#define	M_PROTECT	(Char)0x40
+#define	M_MASK		(Char)0xff
+#define	M_ASCII		(Char)0x7f
+
+typedef char Char;
+
+#endif
+
+
+#define	CHAR(c)		((Char)((c)&M_ASCII))
+#define	META(c)		((Char)((c)|M_QUOTE))
+#define	M_ALL		META('*')
+#define	M_END		META(']')
+#define	M_NOT		META('!')
+#define	M_ONE		META('?')
+#define	M_RNG		META('-')
+#define	M_SET		META('[')
+#define	ismeta(c)	(((c)&M_QUOTE) != 0)
+
+
+static int	 compare(const void *, const void *);
+static int	 g_Ctoc(const Char *, char *, size_t);
+static int	 g_lstat(Char *, __gl_stat_t  *, glob_t *);
+static DIR	*g_opendir(Char *, glob_t *);
+static Char	*g_strchr(const Char *, int);
+static int	 g_stat(Char *, __gl_stat_t *, glob_t *);
+static int	 glob0(const Char *, glob_t *, struct glob_limit *);
+static int	 glob1(Char *, glob_t *, struct glob_limit *);
+static int	 glob2(Char *, Char *, Char *, const Char *, glob_t *,
+    struct glob_limit *);
+static int	 glob3(Char *, Char *, Char *, const Char *, const Char *,
+    const Char *, glob_t *, struct glob_limit *);
+static int	 globextend(const Char *, glob_t *, struct glob_limit *);
+static int       globtilde(const Char **, const Char *, Char *, size_t,
+    glob_t *);
+static int	 globexp1(const Char *, glob_t *, struct glob_limit *);
+static int	 globexp2(const Char *, const Char *, glob_t *, int *,
+    struct glob_limit *);
+static int	 match(const Char *, const Char *, const Char *);
+#ifdef DEBUG
+static void	 qprintf(const char *, Char *);
+#endif
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 1024
+#endif
+
+#ifndef __UNCONST
+#define __UNCONST(a) ((void*)(const void*)a)
+#endif
+
+int
+glob(const char * __restrict pattern, int flags, int (*errfunc)(const char *,
+    int), glob_t * __restrict pglob)
+{
+	const unsigned char *patnext;
+	int c;
+	Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
+	struct glob_limit limit = { 0, 0, 0, 0 };
+
+	_DIAGASSERT(pattern != NULL);
+
+	patnext = (const unsigned char *) pattern;
+	if (!(flags & GLOB_APPEND)) {
+		pglob->gl_pathc = 0;
+		pglob->gl_pathv = NULL;
+		if (!(flags & GLOB_DOOFFS))
+			pglob->gl_offs = 0;
+	}
+	pglob->gl_flags = flags & ~GLOB_MAGCHAR;
+	pglob->gl_errfunc = errfunc;
+	pglob->gl_matchc = 0;
+
+	bufnext = patbuf;
+	bufend = bufnext + MAXPATHLEN;
+	if (flags & GLOB_NOESCAPE) {
+		while (bufnext < bufend && (c = *patnext++) != EOS) 
+			*bufnext++ = c;
+	} else {
+		/* Protect the quoted characters. */
+		while (bufnext < bufend && (c = *patnext++) != EOS) 
+			if (c == QUOTE) {
+				if ((c = *patnext++) == EOS) {
+					c = QUOTE;
+					--patnext;
+				}
+				*bufnext++ = c | M_PROTECT;
+			}
+			else
+				*bufnext++ = c;
+	}
+	*bufnext = EOS;
+
+	if (flags & GLOB_BRACE)
+	    return globexp1(patbuf, pglob, &limit);
+	else
+	    return glob0(patbuf, pglob, &limit);
+}
+
+/*
+ * Expand recursively a glob {} pattern. When there is no more expansion
+ * invoke the standard globbing routine to glob the rest of the magic
+ * characters
+ */
+static int
+globexp1(const Char *pattern, glob_t *pglob, struct glob_limit *limit)
+{
+	const Char* ptr = pattern;
+	int rv;
+
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	if ((pglob->gl_flags & GLOB_LIMIT) &&
+	    limit->l_brace++ >= GLOB_LIMIT_BRACE) {
+		errno = 0;
+		return GLOB_NOSPACE;
+	}
+
+	/* Protect a single {}, for find(1), like csh */
+	if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
+		return glob0(pattern, pglob, limit);
+
+	while ((ptr = (const Char *) g_strchr(ptr, LBRACE)) != NULL)
+		if (!globexp2(ptr, pattern, pglob, &rv, limit))
+			return rv;
+
+	return glob0(pattern, pglob, limit);
+}
+
+
+/*
+ * Recursive brace globbing helper. Tries to expand a single brace.
+ * If it succeeds then it invokes globexp1 with the new pattern.
+ * If it fails then it tries to glob the rest of the pattern and returns.
+ */
+static int
+globexp2(const Char *ptr, const Char *pattern, glob_t *pglob, int *rv,
+    struct glob_limit *limit)
+{
+	int     i;
+	Char   *lm, *ls;
+	const Char *pe, *pm, *pl;
+	Char    patbuf[MAXPATHLEN + 1];
+
+	_DIAGASSERT(ptr != NULL);
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(pglob != NULL);
+	_DIAGASSERT(rv != NULL);
+
+	/* copy part up to the brace */
+	for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
+		continue;
+	ls = lm;
+
+	/* Find the balanced brace */
+	for (i = 0, pe = ++ptr; *pe; pe++)
+		if (*pe == LBRACKET) {
+			/* Ignore everything between [] */
+			for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
+				continue;
+			if (*pe == EOS) {
+				/* 
+				 * We could not find a matching RBRACKET.
+				 * Ignore and just look for RBRACE
+				 */
+				pe = pm;
+			}
+		}
+		else if (*pe == LBRACE)
+			i++;
+		else if (*pe == RBRACE) {
+			if (i == 0)
+				break;
+			i--;
+		}
+
+	/* Non matching braces; just glob the pattern */
+	if (i != 0 || *pe == EOS) {
+		/*
+		 * we use `pattern', not `patbuf' here so that that
+		 * unbalanced braces are passed to the match
+		 */
+		*rv = glob0(pattern, pglob, limit);
+		return 0;
+	}
+
+	for (i = 0, pl = pm = ptr; pm <= pe; pm++) {
+		switch (*pm) {
+		case LBRACKET:
+			/* Ignore everything between [] */
+			for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
+				continue;
+			if (*pm == EOS) {
+				/* 
+				 * We could not find a matching RBRACKET.
+				 * Ignore and just look for RBRACE
+				 */
+				pm = pl;
+			}
+			break;
+
+		case LBRACE:
+			i++;
+			break;
+
+		case RBRACE:
+			if (i) {
+				i--;
+				break;
+			}
+			/* FALLTHROUGH */
+		case COMMA:
+			if (i && *pm == COMMA)
+				break;
+			else {
+				/* Append the current string */
+				for (lm = ls; (pl < pm); *lm++ = *pl++)
+					continue;
+				/* 
+				 * Append the rest of the pattern after the
+				 * closing brace
+				 */
+				for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
+					continue;
+
+				/* Expand the current pattern */
+#ifdef DEBUG
+				qprintf("globexp2", patbuf);
+#endif
+				*rv = globexp1(patbuf, pglob, limit);
+
+				/* move after the comma, to the next string */
+				pl = pm + 1;
+			}
+			break;
+
+		default:
+			break;
+		}
+	}
+	*rv = 0;
+	return 0;
+}
+
+
+
+/*
+ * expand tilde from the passwd file.
+ */
+static int
+globtilde(const Char **qpatnext, const Char *pattern, Char *patbuf,
+    size_t patsize, glob_t *pglob)
+{
+	struct passwd *pwd;
+	const char *h;
+	const Char *p;
+	Char *b;
+	char *d;
+	Char *pend = &patbuf[patsize / sizeof(Char)];
+#ifndef NO_GETPW_R
+	struct passwd pwres;
+	char pwbuf[1024];
+#endif
+
+	pend--;
+
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(patbuf != NULL);
+	_DIAGASSERT(pglob != NULL);
+	*qpatnext = pattern;
+
+	if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
+		return 0;
+
+	/* Copy up to the end of the string or / */
+	for (p = pattern + 1, d = (char *)(void *)patbuf; 
+	     d < (char *)(void *)pend && *p && *p != SLASH; 
+	     *d++ = *p++)
+		continue;
+
+	if (d == (char *)(void *)pend)
+		return GLOB_ABEND;
+
+	*d = EOS;
+	d = (char *)(void *)patbuf;
+
+	if (*d == EOS) {
+		/* 
+		 * handle a plain ~ or ~/ by expanding $HOME 
+		 * first and then trying the password file
+		 */
+		if ((h = getenv("HOME")) == NULL) {
+#ifdef NO_GETPW_R
+			if ((pwd = getpwuid(getuid())) == NULL)
+#else
+			if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
+			    &pwd) != 0 || pwd == NULL)
+#endif
+				goto nouser;
+			h = pwd->pw_dir;
+		}
+	}
+	else {
+		/*
+		 * Expand a ~user
+		 */
+#ifdef NO_GETPW_R
+		if ((pwd = getpwnam(d)) == NULL)
+#else
+		if (getpwnam_r(d, &pwres, pwbuf, sizeof(pwbuf), &pwd) != 0 ||
+		    pwd == NULL)
+#endif
+			goto nouser;
+		h = pwd->pw_dir;
+	}
+
+	/* Copy the home directory */
+	for (b = patbuf; b < pend && *h; *b++ = *h++)
+		continue;
+
+	if (b == pend)
+		return GLOB_ABEND;
+	
+	/* Append the rest of the pattern */
+	while (b < pend && (*b++ = *p++) != EOS)
+		continue;
+
+	if (b == pend)
+		return GLOB_ABEND;
+
+	*qpatnext = patbuf;
+	return 0;
+nouser:
+	return (pglob->gl_flags & GLOB_TILDE_CHECK) ?  GLOB_NOMATCH : 0;
+}
+	
+
+/*
+ * The main glob() routine: compiles the pattern (optionally processing
+ * quotes), calls glob1() to do the real pattern matching, and finally
+ * sorts the list (unless unsorted operation is requested).  Returns 0
+ * if things went well, nonzero if errors occurred.  It is not an error
+ * to find no matches.
+ */
+static int
+glob0(const Char *pattern, glob_t *pglob, struct glob_limit *limit)
+{
+	const Char *qpatnext;
+	int c, error;
+	__gl_size_t oldpathc;
+	Char *bufnext, patbuf[MAXPATHLEN+1];
+
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	if ((error = globtilde(&qpatnext, pattern, patbuf, sizeof(patbuf),
+	    pglob)) != 0)
+		return error;
+	oldpathc = pglob->gl_pathc;
+	bufnext = patbuf;
+
+	/* We don't need to check for buffer overflow any more. */
+	while ((c = *qpatnext++) != EOS) {
+		switch (c) {
+		case LBRACKET:
+			c = *qpatnext;
+			if (c == NOT)
+				++qpatnext;
+			if (*qpatnext == EOS ||
+			    g_strchr(qpatnext+1, RBRACKET) == NULL) {
+				*bufnext++ = LBRACKET;
+				if (c == NOT)
+					--qpatnext;
+				break;
+			}
+			*bufnext++ = M_SET;
+			if (c == NOT)
+				*bufnext++ = M_NOT;
+			c = *qpatnext++;
+			do {
+				*bufnext++ = CHAR(c);
+				if (*qpatnext == RANGE &&
+				    (c = qpatnext[1]) != RBRACKET) {
+					*bufnext++ = M_RNG;
+					*bufnext++ = CHAR(c);
+					qpatnext += 2;
+				}
+			} while ((c = *qpatnext++) != RBRACKET);
+			pglob->gl_flags |= GLOB_MAGCHAR;
+			*bufnext++ = M_END;
+			break;
+		case QUESTION:
+			pglob->gl_flags |= GLOB_MAGCHAR;
+			*bufnext++ = M_ONE;
+			break;
+		case STAR:
+			pglob->gl_flags |= GLOB_MAGCHAR;
+			/* collapse adjacent stars to one [or three if globstar]
+			 * to avoid exponential behavior
+			 */
+			if (bufnext == patbuf || bufnext[-1] != M_ALL ||
+			    ((pglob->gl_flags & GLOB_STAR) != 0 && 
+			    (bufnext - 1 == patbuf || bufnext[-2] != M_ALL ||
+			    bufnext - 2 == patbuf || bufnext[-3] != M_ALL)))
+				*bufnext++ = M_ALL;
+			break;
+		default:
+			*bufnext++ = CHAR(c);
+			break;
+		}
+	}
+	*bufnext = EOS;
+#ifdef DEBUG
+	qprintf("glob0", patbuf);
+#endif
+
+	if ((error = glob1(patbuf, pglob, limit)) != 0)
+		return error;
+
+	if (pglob->gl_pathc == oldpathc) {	
+		/*
+		 * If there was no match we are going to append the pattern 
+		 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was
+		 * specified and the pattern did not contain any magic
+		 * characters GLOB_NOMAGIC is there just for compatibility
+		 * with csh.
+		 */
+		if ((pglob->gl_flags & GLOB_NOCHECK) ||
+		    ((pglob->gl_flags & (GLOB_NOMAGIC|GLOB_MAGCHAR))
+		     == GLOB_NOMAGIC)) {
+			return globextend(pattern, pglob, limit);
+		} else {
+			return GLOB_NOMATCH;
+		}
+	} else if (!(pglob->gl_flags & GLOB_NOSORT)) {
+		qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
+		    (size_t)pglob->gl_pathc - oldpathc, sizeof(char *),
+		    compare);
+	}
+
+	return 0;
+}
+
+static int
+compare(const void *p, const void *q)
+{
+
+	_DIAGASSERT(p != NULL);
+	_DIAGASSERT(q != NULL);
+
+	return strcoll(*(const char * const *)p, *(const char * const *)q);
+}
+
+static int
+glob1(Char *pattern, glob_t *pglob, struct glob_limit *limit)
+{
+	Char pathbuf[MAXPATHLEN+1];
+
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	/* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
+	if (*pattern == EOS)
+		return 0;
+	/*
+	 * we save one character so that we can use ptr >= limit,
+	 * in the general case when we are appending non nul chars only.
+	 */
+	return glob2(pathbuf, pathbuf,
+	    pathbuf + (sizeof(pathbuf) / sizeof(*pathbuf)) - 1, pattern,
+	    pglob, limit);
+}
+
+/*
+ * The functions glob2 and glob3 are mutually recursive; there is one level
+ * of recursion for each segment in the pattern that contains one or more
+ * meta characters.
+ */
+static int
+glob2(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern,
+    glob_t *pglob, struct glob_limit *limit)
+{
+	__gl_stat_t sb;
+	const Char *p;
+	Char *q;
+	int anymeta;
+
+	_DIAGASSERT(pathbuf != NULL);
+	_DIAGASSERT(pathend != NULL);
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+#ifdef DEBUG
+	qprintf("glob2", pathbuf);
+#endif
+	/*
+	 * Loop over pattern segments until end of pattern or until
+	 * segment with meta character found.
+	 */
+	for (anymeta = 0;;) {
+		if (*pattern == EOS) {		/* End of pattern? */
+			*pathend = EOS;
+			if (g_lstat(pathbuf, &sb, pglob))
+				return 0;
+		
+			if ((pglob->gl_flags & GLOB_LIMIT) &&
+			    limit->l_stat++ >= GLOB_LIMIT_STAT) {
+				errno = 0;
+				*pathend++ = SEP;
+				*pathend = EOS;
+				return GLOB_NOSPACE;
+			}
+			if (((pglob->gl_flags & GLOB_MARK) &&
+			    pathend[-1] != SEP) && (S_ISDIR(sb.st_mode) ||
+			    (S_ISLNK(sb.st_mode) &&
+			    (g_stat(pathbuf, &sb, pglob) == 0) &&
+			    S_ISDIR(sb.st_mode)))) {
+				if (pathend >= pathlim)
+					return GLOB_ABORTED;
+				*pathend++ = SEP;
+				*pathend = EOS;
+			}
+			++pglob->gl_matchc;
+			return globextend(pathbuf, pglob, limit);
+		}
+
+		/* Find end of next segment, copy tentatively to pathend. */
+		q = pathend;
+		p = pattern;
+		while (*p != EOS && *p != SEP) {
+			if (ismeta(*p))
+				anymeta = 1;
+			if (q >= pathlim)
+				return GLOB_ABORTED;
+			*q++ = *p++;
+		}
+
+                if (!anymeta) {
+			pathend = q;
+			pattern = p;
+			while (*pattern == SEP) {
+				if (pathend >= pathlim)
+					return GLOB_ABORTED;
+				*pathend++ = *pattern++;
+			}
+		} else			/* Need expansion, recurse. */
+			return glob3(pathbuf, pathend, pathlim, pattern, p,
+			    pattern, pglob, limit);
+	}
+	/* NOTREACHED */
+}
+
+static int
+glob3(Char *pathbuf, Char *pathend, Char *pathlim, const Char *pattern,
+    const Char *restpattern, const Char *pglobstar, glob_t *pglob,
+    struct glob_limit *limit)
+{
+	struct dirent *dp;
+	DIR *dirp;
+	__gl_stat_t sbuf;
+	int error;
+	char buf[MAXPATHLEN];
+	int globstar = 0;
+	int chase_symlinks = 0;
+	const Char *termstar = NULL;
+
+	/*
+	 * The readdirfunc declaration can't be prototyped, because it is
+	 * assigned, below, to two functions which are prototyped in glob.h
+	 * and dirent.h as taking pointers to differently typed opaque
+	 * structures.
+	 */
+	struct dirent *(*readdirfunc)(void *);
+
+	_DIAGASSERT(pathbuf != NULL);
+	_DIAGASSERT(pathend != NULL);
+	_DIAGASSERT(pattern != NULL);
+	_DIAGASSERT(restpattern != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	*pathend = EOS;
+	errno = 0;
+	    
+	while (pglobstar < restpattern) {
+		if ((pglobstar[0] & M_MASK) == M_ALL &&
+		    (pglobstar[1] & M_MASK) == M_ALL) {
+			globstar = 1;
+			chase_symlinks = (pglobstar[2] & M_MASK) == M_ALL;
+			termstar = pglobstar + (2 + chase_symlinks);
+			break;
+		}
+		pglobstar++;
+	} 
+
+	if (globstar) {
+		error = pglobstar == pattern && termstar == restpattern ?
+		    *restpattern == EOS ?
+		    glob2(pathbuf, pathend, pathlim, restpattern - 1, pglob,
+		    limit) :
+		    glob2(pathbuf, pathend, pathlim, restpattern + 1, pglob,
+		    limit) :
+		    glob3(pathbuf, pathend, pathlim, pattern, restpattern,
+		    termstar, pglob, limit);
+		if (error)
+			return error;
+		*pathend = EOS;
+	}
+
+	if (*pathbuf && (g_lstat(pathbuf, &sbuf, pglob) ||
+	    !S_ISDIR(sbuf.st_mode)
+#ifdef S_IFLINK
+	     && ((globstar && !chase_symlinks) || !S_ISLNK(sbuf.st_mode))
+#endif
+	    ))
+		return 0;
+
+	if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
+		if (pglob->gl_errfunc) {
+			if (g_Ctoc(pathbuf, buf, sizeof(buf)))
+				return GLOB_ABORTED;
+			if (pglob->gl_errfunc(buf, errno) ||
+			    pglob->gl_flags & GLOB_ERR)
+				return GLOB_ABORTED;
+		}
+		/*
+		 * Posix/XOpen: glob should return when it encounters a
+		 * directory that it cannot open or read
+		 * XXX: Should we ignore ENOTDIR and ENOENT though?
+		 * I think that Posix had in mind EPERM...
+		 */
+		if (pglob->gl_flags & GLOB_ERR)
+			return GLOB_ABORTED;
+
+		return 0;
+	}
+
+	error = 0;
+
+	/* Search directory for matching names. */
+	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
+		readdirfunc = pglob->gl_readdir;
+	else
+		readdirfunc = (struct dirent *(*)(void *)) readdir;
+	while ((dp = (*readdirfunc)(dirp)) != NULL) {
+		unsigned char *sc;
+		Char *dc;
+
+		if ((pglob->gl_flags & GLOB_LIMIT) &&
+		    limit->l_readdir++ >= GLOB_LIMIT_READDIR) {
+			errno = 0;
+			*pathend++ = SEP;
+			*pathend = EOS;
+			error = GLOB_NOSPACE;
+			break;
+		}
+
+		/*
+		 * Initial DOT must be matched literally, unless we have
+		 * GLOB_PERIOD set.
+		 */
+		if ((pglob->gl_flags & GLOB_PERIOD) == 0)
+			if (dp->d_name[0] == DOT && *pattern != DOT)
+				continue;
+		/*
+		 * If GLOB_NO_DOTDIRS is set, . and .. vanish.
+		 */
+		if ((pglob->gl_flags & GLOB_NO_DOTDIRS) &&
+		    (dp->d_name[0] == DOT) &&
+		    ((dp->d_name[1] == EOS) ||
+		     ((dp->d_name[1] == DOT) && (dp->d_name[2] == EOS))))
+			continue;
+		/*
+		 * The resulting string contains EOS, so we can
+		 * use the pathlim character, if it is the nul
+		 */
+		for (sc = (unsigned char *) dp->d_name, dc = pathend; 
+		     dc <= pathlim && (*dc++ = *sc++) != EOS;)
+			continue;
+
+		/*
+		 * Have we filled the buffer without seeing EOS?
+		 */
+		if (dc > pathlim && *pathlim != EOS) {
+			/*
+			 * Abort when requested by caller, otherwise
+			 * reset pathend back to last SEP and continue
+			 * with next dir entry.
+			 */
+			if (pglob->gl_flags & GLOB_ERR) {
+				error = GLOB_ABORTED;
+				break;
+			}
+			else {
+				*pathend = EOS;
+				continue;
+			}
+		}
+
+		if (globstar) {
+#ifdef S_IFLNK
+			if (!chase_symlinks &&
+			    (g_lstat(pathbuf, &sbuf, pglob) ||
+			    S_ISLNK(sbuf.st_mode)))
+				continue;
+#endif
+
+			if (!match(pathend, pattern, termstar))
+				continue;
+	    
+			if (--dc < pathlim - 2)
+				*dc++ = SEP;
+			*dc = EOS;
+			error = glob2(pathbuf, dc, pathlim, pglobstar,
+			    pglob, limit);
+			if (error)
+				break;
+			*pathend = EOS;
+		} else {
+			if (!match(pathend, pattern, restpattern)) {
+				*pathend = EOS;
+				continue;
+			}
+			error = glob2(pathbuf, --dc, pathlim, restpattern,
+			    pglob, limit);
+			if (error)
+				break;
+		}
+	}
+	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
+		(*pglob->gl_closedir)(dirp);
+	else
+		closedir(dirp);
+
+	/*
+	 * Again Posix X/Open issue with regards to error handling.
+	 */
+	if ((error || errno) && (pglob->gl_flags & GLOB_ERR))
+		return GLOB_ABORTED;
+
+	return error;
+}
+
+
+/*
+ * Extend the gl_pathv member of a glob_t structure to accommodate a new item,
+ * add the new item, and update gl_pathc.
+ *
+ * This assumes the BSD realloc, which only copies the block when its size
+ * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
+ * behavior.
+ *
+ * Return 0 if new item added, error code if memory couldn't be allocated.
+ *
+ * Invariant of the glob_t structure:
+ *	Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
+ *	gl_pathv points to (gl_offs + gl_pathc + 1) items.
+ */
+static int
+globextend(const Char *path, glob_t *pglob, struct glob_limit *limit)
+{
+	char **pathv;
+	size_t i, newsize, len;
+	char *copy;
+	const Char *p;
+
+	_DIAGASSERT(path != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
+	if ((pglob->gl_flags & GLOB_LIMIT) &&
+	    newsize > GLOB_LIMIT_PATH * sizeof(*pathv))
+		goto nospace;
+	pathv = pglob->gl_pathv ? realloc(pglob->gl_pathv, newsize) :
+	    malloc(newsize);
+	if (pathv == NULL)
+		return GLOB_NOSPACE;
+
+	if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
+		/* first time around -- clear initial gl_offs items */
+		pathv += pglob->gl_offs;
+		for (i = pglob->gl_offs + 1; --i > 0; )
+			*--pathv = NULL;
+	}
+	pglob->gl_pathv = pathv;
+
+	for (p = path; *p++;)
+		continue;
+	len = (size_t)(p - path);
+	limit->l_string += len;
+	if ((copy = malloc(len)) != NULL) {
+		if (g_Ctoc(path, copy, len)) {
+			free(copy);
+			return GLOB_ABORTED;
+		}
+		pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
+	}
+	pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
+
+	if ((pglob->gl_flags & GLOB_LIMIT) &&
+	    (newsize + limit->l_string) >= GLOB_LIMIT_STRING)
+		goto nospace;
+
+	return copy == NULL ? GLOB_NOSPACE : 0;
+nospace:
+	errno = 0;
+	return GLOB_NOSPACE;
+}
+
+
+/*
+ * pattern matching function for filenames.
+ */
+static int
+match(const Char *name, const Char *pat, const Char *patend)
+{
+	int ok, negate_range;
+	Char c, k;
+	const Char *patNext, *nameNext, *nameStart, *nameEnd;
+
+	_DIAGASSERT(name != NULL);
+	_DIAGASSERT(pat != NULL);
+	_DIAGASSERT(patend != NULL);
+	patNext = pat;
+	nameStart = nameNext = name;
+	nameEnd = NULL;
+
+	while (pat < patend || *name) {
+		c = *pat;
+		if (*name == EOS)
+			nameEnd = name;
+		switch (c & M_MASK) {
+		case M_ALL:
+			while ((pat[1] & M_MASK) == M_ALL) pat++;
+			patNext = pat;
+			nameNext = name + 1;
+			pat++;
+			continue;
+		case M_ONE:
+			if (*name == EOS)
+				break;
+			pat++;
+			name++;
+			continue;
+		case M_SET:
+			ok = 0;
+			if ((k = *name) == EOS)
+				break;
+			pat++;
+			name++;
+			if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
+				++pat;
+			while (((c = *pat++) & M_MASK) != M_END)
+				if ((*pat & M_MASK) == M_RNG) {
+					if (c <= k && k <= pat[1])
+						ok = 1;
+					pat += 2;
+				} else if (c == k)
+					ok = 1;
+			if (ok == negate_range)
+				break;
+			continue;
+		default:
+			if (*name != c)
+				break;
+			pat++;
+			name++;
+			continue;
+		}
+		if (nameNext != nameStart
+		    && (nameEnd == NULL || nameNext <= nameEnd)) {
+			pat = patNext;
+			name = nameNext;
+			continue;
+		}
+		return 0;
+	}
+	return 1;
+}
+
+/* Free allocated data belonging to a glob_t structure. */
+void
+globfree(glob_t *pglob)
+{
+	size_t i;
+	char **pp;
+
+	_DIAGASSERT(pglob != NULL);
+
+	if (pglob->gl_pathv != NULL) {
+		pp = pglob->gl_pathv + pglob->gl_offs;
+		for (i = pglob->gl_pathc; i--; ++pp)
+			if (*pp)
+				free(*pp);
+		free(pglob->gl_pathv);
+		pglob->gl_pathv = NULL;
+		pglob->gl_pathc = 0;
+	}
+}
+
+#ifndef __LIBC12_SOURCE__
+int
+glob_pattern_p(const char *pattern, int quote)
+{
+	int range = 0;
+
+	for (; *pattern; pattern++)
+		switch (*pattern) {
+		case QUESTION:
+		case STAR:
+			return 1;
+
+		case QUOTE:
+			if (quote && pattern[1] != EOS)
+			      ++pattern;
+			break;
+
+		case LBRACKET:
+			range = 1;
+			break;
+
+		case RBRACKET:
+			if (range)
+			      return 1;
+			break;
+		default:
+			break;
+		}
+
+	  return 0;
+}
+#endif
+
+static DIR *
+g_opendir(Char *str, glob_t *pglob)
+{
+	char buf[MAXPATHLEN];
+
+	_DIAGASSERT(str != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	if (!*str)
+		(void)strlcpy(buf, ".", sizeof(buf));
+	else {
+		if (g_Ctoc(str, buf, sizeof(buf)))
+			return NULL;
+	}
+
+	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
+		return (*pglob->gl_opendir)(buf);
+
+	return opendir(buf);
+}
+
+static int
+g_lstat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
+{
+	char buf[MAXPATHLEN];
+
+	_DIAGASSERT(fn != NULL);
+	_DIAGASSERT(sb != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	if (g_Ctoc(fn, buf, sizeof(buf)))
+		return -1;
+	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
+		return (*pglob->gl_lstat)(buf, sb);
+	return lstat(buf, sb);
+}
+
+static int
+g_stat(Char *fn, __gl_stat_t *sb, glob_t *pglob)
+{
+	char buf[MAXPATHLEN];
+
+	_DIAGASSERT(fn != NULL);
+	_DIAGASSERT(sb != NULL);
+	_DIAGASSERT(pglob != NULL);
+
+	if (g_Ctoc(fn, buf, sizeof(buf)))
+		return -1;
+	if (pglob->gl_flags & GLOB_ALTDIRFUNC)
+		return (*pglob->gl_stat)(buf, sb);
+	return stat(buf, sb);
+}
+
+static Char *
+g_strchr(const Char *str, int ch)
+{
+
+	_DIAGASSERT(str != NULL);
+
+	do {
+		if (*str == ch)
+			return __UNCONST(str);
+	} while (*str++);
+	return NULL;
+}
+
+static int
+g_Ctoc(const Char *str, char *buf, size_t len)
+{
+	char *dc;
+
+	_DIAGASSERT(str != NULL);
+	_DIAGASSERT(buf != NULL);
+
+	if (len == 0)
+		return 1;
+
+	for (dc = buf; len && (*dc++ = *str++) != EOS; len--)
+		continue;
+
+	return len == 0;
+}
+
+#ifdef DEBUG
+static void 
+qprintf(const char *str, Char *s)
+{
+	Char *p;
+
+	_DIAGASSERT(str != NULL);
+	_DIAGASSERT(s != NULL);
+
+	(void)printf("%s:\n", str);
+	for (p = s; *p; p++)
+		(void)printf("%c", CHAR(*p));
+	(void)printf("\n");
+	for (p = s; *p; p++)
+		(void)printf("%c", *p & M_PROTECT ? '"' : ' ');
+	(void)printf("\n");
+	for (p = s; *p; p++)
+		(void)printf("%c", ismeta(*p) ? '_' : ' ');
+	(void)printf("\n");
+}
+#endif