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newlib-cygwin/winsup/cygwin/glob.cc

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/*
* 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.
* 4. 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.
*/
#ifdef __CYGWIN__
#include "winsup.h"
#endif
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/glob.c,v 1.28 2010/05/12 17:44:00 gordon Exp $");
/*
* glob(3) -- a superset of the one defined in POSIX 1003.2.
*
* The [!...] convention to negate a range is supported (SysV, Posix, ksh).
*
* Optional extra services, controlled by flags not defined by POSIX:
*
* GLOB_QUOTE:
* Escaping convention: \ inhibits any special meaning the following
* character might have (except \ at end of string is retained).
* GLOB_MAGCHAR:
* Set in gl_flags if pattern contained a globbing character.
* GLOB_NOMAGIC:
* Same as GLOB_NOCHECK, but it will only append pattern if it did
* not contain any magic characters. [Used in csh style globbing]
* GLOB_ALTDIRFUNC:
* Use alternately specified directory access functions.
* GLOB_TILDE:
* expand ~user/foo to the /home/dir/of/user/foo
* GLOB_BRACE:
* expand {1,2}{a,b} to 1a 1b 2a 2b
* gl_matchc:
* Number of matches in the current invocation of glob.
*/
/*
* Some notes on multibyte character support:
* 1. Patterns with illegal byte sequences match nothing - even if
* GLOB_NOCHECK is specified.
* 2. Illegal byte sequences in filenames are handled by treating them as
* single-byte characters with a value of the first byte of the sequence
* cast to wint_t.
* 3. State-dependent encodings are not currently supported.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <glob.h>
#include <limits.h>
#include <pwd.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
#include "collate.h"
#ifdef __CYGWIN__
#define Cchar(c) (ignore_case_with_glob ? towlower (c) : (c))
#else
#define Cchar(c) (c)
#endif
#undef MAXPATHLEN
#define MAXPATHLEN 8192
#define DOLLAR '$'
#define DOT '.'
#define COLON ':'
#define EQUALS '='
#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 ','
#undef DEBUG /* never define */
#ifndef DEBUG
#define M_QUOTE 0x40000000U
#define M_PROTECT 0x20000000U
#define M_MASK 0x70ffffffU
#define M_COLL_MASK 0x700000ffU
#define M_CHAR 0x0fffffffU
typedef wint_t Char;
#else
#define M_QUOTE 0x80
#define M_PROTECT 0x40
#define M_MASK 0xff
#define M_CHAR 0x7f
typedef char Char;
#endif
#define CHAR(c) ((Char)((c)&M_CHAR))
#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 M_NAMED META(':')
#define M_EQUIV META('=')
#define M_COLL(_ccnt) META('.' | ((_ccnt) << 8))
#define M_COLL_P(_c) (((_c) & M_COLL_MASK) == META('.'))
#define M_COLL_CNT(_c) (((_c) & ~M_COLL_MASK) >> 8)
#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 *, struct stat *, glob_t *);
static DIR *g_opendir(Char *, glob_t *);
static const Char *g_strchr(const Char *, wint_t);
#ifdef notdef
static Char *g_strcat(Char *, const Char *);
#endif
static int g_stat(Char *, struct stat *, glob_t *);
static int glob0(const Char *, glob_t *, size_t *);
static int glob1(Char *, glob_t *, size_t *);
static int glob2(Char *, Char *, Char *, Char *, glob_t *, size_t *);
static int glob3(Char *, Char *, Char *, Char *, Char *, glob_t *, size_t *);
static int globextend(const Char *, glob_t *, size_t *);
static const Char *
globtilde(const Char *, Char *, size_t, glob_t *);
static int globexp1(const Char *, glob_t *, size_t *);
static int globexp2(const Char *, const Char *, glob_t *, int *, size_t *);
static int match(Char *, Char *, Char *);
#ifdef DEBUG
static void qprintf(const char *, Char *);
#endif
/* Return value is either EOS, COLON, DOT, EQUALS, or LBRACKET if no class
expression found. */
static inline Char
check_classes_expr(const Char *&cptr, wint_t *classbuf = NULL,
size_t classbufsize = 0)
{
const Char *ctype = NULL;
if (*cptr == LBRACKET &&
(cptr[1] == COLON || cptr[1] == DOT || cptr[1] == EQUALS)) {
ctype = ++cptr;
while (*++cptr != EOS &&
(*cptr != *ctype || cptr[1] != RBRACKET))
;
if (*cptr == EOS)
return EOS;
if (classbuf) {
const Char *class_p = ctype + 1;
size_t clen = cptr - class_p;
size_t idx;
if (clen < classbufsize) {
for (idx = 0; idx < clen; ++idx)
classbuf[idx] = CHAR(class_p[idx]);
classbuf[idx] = '\0';
} else
ctype = NULL;
}
cptr++; /* Advance cptr to closing RBRACKET of class expr */
}
return ctype ? *ctype : LBRACKET;
}
int
glob(const char *__restrict pattern, int flags, int (*errfunc)(const char *, int), glob_t *__restrict pglob)
{
const char *patnext;
size_t limit;
Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot;
mbstate_t mbs;
wint_t wc;
size_t clen;
patnext = pattern;
if (!(flags & GLOB_APPEND)) {
pglob->gl_pathc = 0;
pglob->gl_pathv = NULL;
if (!(flags & GLOB_DOOFFS))
pglob->gl_offs = 0;
}
if (flags & GLOB_LIMIT) {
limit = pglob->gl_matchc;
if (limit == 0)
limit = ARG_MAX;
} else
limit = 0;
pglob->gl_flags = flags & ~GLOB_MAGCHAR;
pglob->gl_errfunc = errfunc;
pglob->gl_matchc = 0;
bufnext = patbuf;
bufend = bufnext + MAXPATHLEN - 1;
if (flags & GLOB_NOESCAPE) {
memset(&mbs, 0, sizeof(mbs));
while (bufend - bufnext >= MB_CUR_MAX) {
clen = mbrtowi(&wc, patnext, MB_LEN_MAX, &mbs);
if (clen == (size_t)-1 || clen == (size_t)-2)
return (GLOB_NOMATCH);
else if (clen == 0)
break;
*bufnext++ = Cchar(wc);
patnext += clen;
}
} else {
/* Protect the quoted characters. */
memset(&mbs, 0, sizeof(mbs));
while (bufend - bufnext >= MB_CUR_MAX) {
if (*patnext == QUOTE) {
if (*++patnext == EOS) {
*bufnext++ = QUOTE | M_PROTECT;
continue;
}
prot = M_PROTECT;
} else
prot = 0;
clen = mbrtowi(&wc, patnext, MB_LEN_MAX, &mbs);
if (clen == (size_t)-1 || clen == (size_t)-2)
return (GLOB_NOMATCH);
else if (clen == 0)
break;
*bufnext++ = Cchar(wc) | prot;
patnext += clen;
}
}
*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, size_t *limit)
{
const Char* ptr = pattern;
int rv;
/* 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 = 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, size_t *limit)
{
int i;
Char *lm, *ls;
const Char *pe, *pm, *pm1, *pl;
Char patbuf[MAXPATHLEN];
/* copy part up to the brace */
for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
continue;
*lm = EOS;
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++) {
if (check_classes_expr (pe) == EOS)
break;
}
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) {
*rv = glob0(patbuf, pglob, limit);
return 0;
}
for (i = 0, pl = pm = ptr; pm <= pe; pm++)
switch (*pm) {
case LBRACKET:
/* Ignore everything between [] */
for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++) {
if (check_classes_expr (pm) == EOS)
break;
}
if (*pm == EOS) {
/*
* We could not find a matching RBRACKET.
* Ignore and just look for RBRACE
*/
pm = pm1;
}
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 const Char *
globtilde(const Char *pattern, Char *patbuf, size_t patbuf_len, glob_t *pglob)
{
struct passwd *pwd;
char *h;
const Char *p;
Char *b, *eb;
if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
return pattern;
/*
* Copy up to the end of the string or /
*/
eb = &patbuf[patbuf_len - 1];
for (p = pattern + 1, h = (char *) patbuf;
h < (char *)eb && *p && *p != SLASH; *h++ = *p++)
continue;
*h = EOS;
if (((char *) patbuf)[0] == EOS) {
/*
* handle a plain ~ or ~/ by expanding $HOME first (iff
* we're not running setuid or setgid) and then trying
* the password file
*/
if (issetugid() != 0 ||
(h = getenv("HOME")) == NULL) {
if (((h = getlogin()) != NULL &&
(pwd = getpwnam(h)) != NULL) ||
(pwd = getpwuid(getuid())) != NULL)
h = pwd->pw_dir;
else
return pattern;
}
}
else {
/*
* Expand a ~user
*/
if ((pwd = getpwnam((char*) patbuf)) == NULL)
return pattern;
else
h = pwd->pw_dir;
}
/* Copy the home directory */
for (b = patbuf; b < eb && *h; *b++ = *h++)
continue;
/* Append the rest of the pattern */
while (b < eb && (*b++ = *p++) != EOS)
continue;
*b = EOS;
return patbuf;
}
static void
wcitoascii(char *dst, wint_t *src)
{
while ((*dst++ = *src++));
}
/*
* 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.
*/
static int
glob0(const Char *pattern, glob_t *pglob, size_t *limit)
{
const Char *qpatnext, *qpatrbsrch;
int err;
size_t oldpathc;
Char *bufnext, c, patbuf[MAXPATHLEN];
qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob);
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;
for (qpatrbsrch = qpatnext;
*qpatrbsrch != RBRACKET && *qpatrbsrch != EOS;
++qpatrbsrch) {
if (check_classes_expr (qpatrbsrch) == EOS)
break;
}
if (*qpatrbsrch == EOS) {
*bufnext++ = LBRACKET;
if (c == NOT)
--qpatnext;
break;
}
*bufnext++ = M_SET;
if (c == NOT)
*bufnext++ = M_NOT;
c = *qpatnext++;
do {
wint_t wclass[64];
Char ctype;
ctype = check_classes_expr(--qpatnext, wclass,
64);
++qpatnext;
if (ctype == COLON) {
wctype_t type;
char cclass[64];
/* No worries, char classes are
ASCII-only anyway */
wcitoascii (cclass, wclass);
if ((type = wctype (cclass))) {
*bufnext++ = M_NAMED;
*bufnext++ = CHAR (type);
}
continue;
}
if (ctype == EQUALS) {
if (wclass[0] && !wclass[1]) {
*bufnext++ = M_EQUIV;
*bufnext++ = CHAR (wclass[0]);
}
continue;
}
if (ctype == DOT &&
is_unicode_coll_elem (wclass)) {
*bufnext++ =
M_COLL (wcilen (wclass));
wint_t *wcp = wclass;
while ((*bufnext++ = *wcp++))
;
--bufnext; /* drop NUL */
} else
*bufnext++ = CHAR(c);
if (*qpatnext == RANGE &&
(c = qpatnext[1]) != RBRACKET) {
*bufnext++ = M_RNG;
ctype = check_classes_expr(++qpatnext,
wclass, 64);
if (ctype == DOT &&
is_unicode_coll_elem (wclass)) {
*bufnext++ =
M_COLL (wcilen (wclass));
wint_t *wcp = wclass;
while ((*bufnext++ = *wcp++))
;
--bufnext; /* drop NUL */
} else
*bufnext++ = CHAR(c);
++qpatnext;
}
} 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,
* to avoid exponential behavior
*/
if (bufnext == patbuf || bufnext[-1] != M_ALL)
*bufnext++ = M_ALL;
break;
default:
*bufnext++ = CHAR(c);
break;
}
}
*bufnext = EOS;
#ifdef DEBUG
qprintf("glob0:", patbuf);
#endif
if ((err = glob1(patbuf, pglob, limit)) != 0)
return(err);
/*
* 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_pathc == oldpathc) {
if (((pglob->gl_flags & GLOB_NOCHECK) ||
((pglob->gl_flags & GLOB_NOMAGIC) &&
!(pglob->gl_flags & GLOB_MAGCHAR))))
return(globextend(pattern, pglob, limit));
else
return(GLOB_NOMATCH);
}
if (!(pglob->gl_flags & GLOB_NOSORT))
qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
pglob->gl_pathc - oldpathc, sizeof(char *), compare);
return(0);
}
static int
compare(const void *p, const void *q)
{
return(strcoll(*(char **)p, *(char **)q));
}
static int
glob1(Char *pattern, glob_t *pglob, size_t *limit)
{
Char pathbuf[MAXPATHLEN];
/* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
if (*pattern == EOS)
return(0);
return(glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 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 *pathend_last, Char *pattern,
glob_t *pglob, size_t *limit)
{
struct stat sb;
Char *p, *q;
int anymeta;
/*
* 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_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 + 1 > pathend_last)
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 + 1 > pathend_last)
return (GLOB_ABORTED);
*q++ = *p++;
}
if (!anymeta) { /* No expansion, do next segment. */
pathend = q;
pattern = p;
while (*pattern == SEP) {
if (pathend + 1 > pathend_last)
return (GLOB_ABORTED);
*pathend++ = *pattern++;
}
} else /* Need expansion, recurse. */
return(glob3(pathbuf, pathend, pathend_last, pattern, p,
pglob, limit));
}
/* NOTREACHED */
}
static int
glob3(Char *pathbuf, Char *pathend, Char *pathend_last,
Char *pattern, Char *restpattern,
glob_t *pglob, size_t *limit)
{
struct dirent *dp;
DIR *dirp;
int err;
char buf[MAXPATHLEN];
/*
* 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.
* CYGWIN: Needs prototype and subsequently wild casting to avoid
* compiler error.
*/
struct dirent *(*readdirfunc)(void *);
if (pathend > pathend_last)
return (GLOB_ABORTED);
*pathend = EOS;
errno = 0;
if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
/* TODO: don't call for ENOENT or ENOTDIR? */
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);
}
return(0);
}
err = 0;
/* Search directory for matching names. */
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
readdirfunc = pglob->gl_readdir;
else
readdirfunc = (dirent*(*)(void*)) readdir;
while ((dp = (*readdirfunc)(dirp))) {
char *sc;
Char *dc;
wint_t wc;
size_t clen;
mbstate_t mbs;
/* Initial DOT must be matched literally. */
if (dp->d_name[0] == DOT && *pattern != DOT)
continue;
memset(&mbs, 0, sizeof(mbs));
dc = pathend;
sc = dp->d_name;
while (dc < pathend_last) {
clen = mbrtowi(&wc, sc, MB_LEN_MAX, &mbs);
if (clen == (size_t)-1 || clen == (size_t)-2) {
wc = *sc;
clen = 1;
memset(&mbs, 0, sizeof(mbs));
}
if ((*dc++ = wc) == EOS)
break;
sc += clen;
}
#ifdef __CYGWIN__
if (ignore_case_with_glob) {
wint_t lower_path[MAXPATHLEN];
wint_t *lp = lower_path, *sp = pathend;
while ((*lp++ = towlower(*sp++)))
;
if (!match(lower_path, pattern, restpattern)) {
*pathend = EOS;
continue;
}
} else
#endif
if (!match(pathend, pattern, restpattern)) {
*pathend = EOS;
continue;
}
err = glob2(pathbuf, --dc, pathend_last, restpattern,
pglob, limit);
if (err)
break;
}
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
(*pglob->gl_closedir)(dirp);
else
closedir(dirp);
return(err);
}
/*
* Extend the gl_pathv member of a glob_t structure to accomodate 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, size_t *limit)
{
char **pathv;
size_t i, newsize, len;
char *copy;
const Char *p;
if (*limit && pglob->gl_pathc > *limit) {
errno = 0;
return (GLOB_NOSPACE);
}
newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
pathv = pglob->gl_pathv ?
(char **) realloc((char *)pglob->gl_pathv, newsize) :
(char **) malloc(newsize);
if (pathv == NULL) {
if (pglob->gl_pathv) {
free(pglob->gl_pathv);
pglob->gl_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 = MB_CUR_MAX * (size_t)(p - path); /* XXX overallocation */
if ((copy = (char *) malloc(len)) != NULL) {
if (g_Ctoc(path, copy, len)) {
free(copy);
return (GLOB_NOSPACE);
}
pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
}
pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
return(copy == NULL ? GLOB_NOSPACE : 0);
}
/*
* pattern matching function for filenames. Each occurrence of the *
* pattern causes a recursion level.
*/
static int
match(Char *name, Char *pat, Char *patend)
{
int ok, negate_range;
Char *c, *k;
size_t k_len;
while (pat < patend) {
c = pat++;
switch (*c & M_MASK) {
case M_ALL:
if (pat == patend)
return(1);
do
if (match(name, pat, patend))
return(1);
while (*name++ != EOS);
return(0);
case M_ONE:
if (*name++ == EOS)
return(0);
break;
case M_SET:
ok = 0;
if (*(k = name) == EOS)
return(0);
k_len = next_unicode_char (k);
name += k_len;
if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
++pat;
while ((*(c = pat++) & M_MASK) != M_END) {
size_t len1 = 1, len2 = 1;
if ((*c & M_MASK) == M_NAMED) {
if (iswctype (*k, *pat++))
ok = 1;
continue;
}
if ((*c & M_MASK) == M_EQUIV) {
if (is_unicode_equiv (*k, *pat++))
ok = 1;
continue;
}
if (M_COLL_P(*c)) {
len1 = M_COLL_CNT(*c);
++c;
pat += len1;
}
if ((*pat & M_MASK) == M_RNG) {
if (M_COLL_P(pat[1]))
len2 = M_COLL_CNT(*++pat);
#ifdef __CYGWIN__
if ((!__get_current_collate_locale ()->lcid) ?
#else
if (__collate_load_error ?
#endif
*c <= *k && *k <= pat[1] :
__wscollate_range_cmp(c, k, len1, k_len) <= 0
&& __wscollate_range_cmp(k, pat + 1, k_len, len2) <= 0
)
ok = 1;
pat += len2 + 1;
} else if (len1 == k_len &&
wcincmp (c, k, len1) == 0)
ok = 1;
}
if (ok == negate_range)
return(0);
break;
default:
if (*name++ != *c)
return(0);
break;
}
}
return(*name == EOS);
}
/* Free allocated data belonging to a glob_t structure. */
void
globfree(glob_t *pglob)
{
size_t i;
char **pp;
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;
}
}
static DIR *
g_opendir(Char *str, glob_t *pglob)
{
char buf[MAXPATHLEN];
if (!*str)
strcpy(buf, ".");
else {
if (g_Ctoc(str, buf, sizeof(buf)))
return (NULL);
}
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
return (DIR *) ((*pglob->gl_opendir)((const char *) buf));
return(opendir(buf));
}
#define CYGWIN_gl_stat(sfptr) ((*pglob->sfptr) (buf, sb))
static int
g_lstat(Char *fn, struct stat *sb, glob_t *pglob)
{
char buf[MAXPATHLEN];
if (g_Ctoc(fn, buf, sizeof(buf))) {
errno = ENAMETOOLONG;
return (-1);
}
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
return CYGWIN_gl_stat (gl_lstat);
return(lstat(buf, sb));
}
static int
g_stat(Char *fn, struct stat *sb, glob_t *pglob)
{
char buf[MAXPATHLEN];
if (g_Ctoc(fn, buf, sizeof(buf))) {
errno = ENAMETOOLONG;
return (-1);
}
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
return CYGWIN_gl_stat (gl_stat);
return(stat(buf, sb));
}
static const Char *
g_strchr(const Char *str, wint_t ch)
{
do {
if (*str == ch)
return (str);
} while (*str++);
return (NULL);
}
static int
g_Ctoc(const Char *str, char *buf, size_t len)
{
mbstate_t mbs;
size_t clen;
memset(&mbs, 0, sizeof(mbs));
while (len >= (size_t) MB_CUR_MAX) {
clen = wirtomb(buf, *str, &mbs);
if (clen == (size_t)-1)
return (1);
if (*str == L'\0')
return (0);
str++;
buf += clen;
len -= clen;
}
return (1);
}
#ifdef DEBUG
static void
qprintf(const char *str, Char *s)
{
Char *p;
(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
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