#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/glob.c,v 1.28 2010/05/12 17:44:00 gordon Exp $");
#include <sys/param.h>
#include <sys/stat.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <glob.h>
#include <limits.h>
#include <pwd.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include "collate.h"
#define DOLLAR '$'
#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 DEBUG
#define M_QUOTE 0x8000000000ULL
#define M_PROTECT 0x4000000000ULL
#define M_MASK 0xffffffffffULL
#define M_CHAR 0x00ffffffffULL
typedef uint_fast64_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 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 *, wchar_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
int
glob(const char *pattern, int flags, int (*errfunc)(const char *, int), glob_t *pglob)
{
const char *patnext;
size_t limit;
Char *bufnext, *bufend, patbuf[MAXPATHLEN], prot;
mbstate_t mbs;
wchar_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 = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs);
if (clen == (size_t)-1 || clen == (size_t)-2)
return (GLOB_NOMATCH);
else if (clen == 0)
break;
*bufnext++ = wc;
patnext += clen;
}
} else {
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 = mbrtowc(&wc, patnext, MB_LEN_MAX, &mbs);
if (clen == (size_t)-1 || clen == (size_t)-2)
return (GLOB_NOMATCH);
else if (clen == 0)
break;
*bufnext++ = wc | prot;
patnext += clen;
}
}
*bufnext = EOS;
if (flags & GLOB_BRACE)
return globexp1(patbuf, pglob, &limit);
else
return glob0(patbuf, pglob, &limit);
}
static int
globexp1(const Char *pattern, glob_t *pglob, size_t *limit)
{
const Char* ptr = pattern;
int rv;
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);
}
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];
for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
continue;
*lm = EOS;
ls = lm;
for (i = 0, pe = ++ptr; *pe; pe++)
if (*pe == LBRACKET) {
for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
continue;
if (*pe == EOS) {
pe = pm;
}
}
else if (*pe == LBRACE)
i++;
else if (*pe == RBRACE) {
if (i == 0)
break;
i--;
}
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:
for (pm1 = pm++; *pm != RBRACKET && *pm != EOS; pm++)
continue;
if (*pm == EOS) {
pm = pm1;
}
break;
case LBRACE:
i++;
break;
case RBRACE:
if (i) {
i--;
break;
}
case COMMA:
if (i && *pm == COMMA)
break;
else {
for (lm = ls; (pl < pm); *lm++ = *pl++)
continue;
for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
continue;
#ifdef DEBUG
qprintf("globexp2:", patbuf);
#endif
*rv = globexp1(patbuf, pglob, limit);
pl = pm + 1;
}
break;
default:
break;
}
*rv = 0;
return 0;
}
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;
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) {
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 {
if ((pwd = getpwnam((char*) patbuf)) == NULL)
return pattern;
else
h = pwd->pw_dir;
}
for (b = patbuf; b < eb && *h; *b++ = *h++)
continue;
while (b < eb && (*b++ = *p++) != EOS)
continue;
*b = EOS;
return patbuf;
}
static int
glob0(const Char *pattern, glob_t *pglob, size_t *limit)
{
const Char *qpatnext;
int err;
size_t oldpathc;
Char *bufnext, c, patbuf[MAXPATHLEN];
qpatnext = globtilde(pattern, patbuf, MAXPATHLEN, pglob);
oldpathc = pglob->gl_pathc;
bufnext = patbuf;
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;
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 (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(strcmp(*(char **)p, *(char **)q));
}
static int
glob1(Char *pattern, glob_t *pglob, size_t *limit)
{
Char pathbuf[MAXPATHLEN];
if (*pattern == EOS)
return(0);
return(glob2(pathbuf, pathbuf, pathbuf + MAXPATHLEN - 1,
pattern, pglob, limit));
}
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;
for (anymeta = 0;;) {
if (*pattern == EOS) {
*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));
}
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) {
pathend = q;
pattern = p;
while (*pattern == SEP) {
if (pathend + 1 > pathend_last)
return (GLOB_ABORTED);
*pathend++ = *pattern++;
}
} else
return(glob3(pathbuf, pathend, pathend_last, pattern, p,
pglob, limit));
}
}
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];
struct dirent *(*readdirfunc)();
if (pathend > pathend_last)
return (GLOB_ABORTED);
*pathend = EOS;
errno = 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);
}
return(0);
}
err = 0;
if (pglob->gl_flags & GLOB_ALTDIRFUNC)
readdirfunc = pglob->gl_readdir;
else
readdirfunc = readdir;
while ((dp = (*readdirfunc)(dirp))) {
char *sc;
Char *dc;
wchar_t wc;
size_t clen;
mbstate_t mbs;
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 = mbrtowc(&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;
}
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);
}
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 ?
realloc((char *)pglob->gl_pathv, newsize) :
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) {
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);
if ((copy = 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);
}
static int
match(Char *name, Char *pat, Char *patend)
{
int ok, negate_range;
Char c, k;
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);
if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
++pat;
while (((c = *pat++) & M_MASK) != M_END)
if ((*pat & M_MASK) == M_RNG) {
if (__collate_load_error ?
CHAR(c) <= CHAR(k) && CHAR(k) <= CHAR(pat[1]) :
__collate_range_cmp(CHAR(c), CHAR(k)) <= 0
&& __collate_range_cmp(CHAR(k), CHAR(pat[1])) <= 0
)
ok = 1;
pat += 2;
} else if (c == k)
ok = 1;
if (ok == negate_range)
return(0);
break;
default:
if (*name++ != c)
return(0);
break;
}
}
return(*name == EOS);
}
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((*pglob->gl_opendir)(buf));
return(opendir(buf));
}
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((*pglob->gl_lstat)(buf, sb));
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((*pglob->gl_stat)(buf, sb));
return(stat(buf, sb));
}
static const Char *
g_strchr(const Char *str, wchar_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 >= MB_CUR_MAX) {
clen = wcrtomb(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