/* * Copyright (c) 1989, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Guido van Rossum. * * Copyright (c) 2011 The FreeBSD Foundation * All rights reserved. * Portions of this software were developed by David Chisnall * under sponsorship from the FreeBSD Foundation. * * 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. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; #endif /* LIBC_SCCS and not lint */ #include "winsup.h" #include __FBSDID("$FreeBSD: head/lib/libc/gen/fnmatch.c 288309 2015-09-27 12:52:18Z jilles $"); /* * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. * Compares a filename or pathname to a pattern. */ /* * Some notes on multibyte character support: * 1. Patterns with illegal byte sequences match nothing. * 2. Illegal byte sequences in the "string" argument are handled by treating * them as single-byte characters with a value of the first byte of the * sequence cast to wint_t. * 3. Multibyte conversion state objects (mbstate_t) are passed around and * used for most, but not all, conversions. Further work will be required * to support state-dependent encodings. */ #include #include #include #include #include #include "collate.h" #define EOS '\0' #define RANGE_MATCH 1 #define RANGE_NOMATCH 0 #define RANGE_ERROR (-1) static int rangematch(const wint_t *, wint_t *, int, wint_t **, mbstate_t *); int fnmatch(const char *in_pattern, const char *in_string, int flags) { size_t pclen = strlen (in_pattern); size_t sclen = strlen (in_string); wint_t *pattern = (wint_t *) alloca ((pclen + 1) * sizeof (wint_t)); wint_t *string = (wint_t *) alloca ((sclen + 1) * sizeof (wint_t)); const wint_t *stringstart = string; const wint_t *bt_pattern, *bt_string; mbstate_t patmbs = { 0 }; mbstate_t strmbs = { 0 }; mbstate_t bt_patmbs, bt_strmbs; wint_t *newp; wint_t *c; wint_t *pc, *sc; pclen = mbsnrtowci (pattern, &in_pattern, (size_t) -1, pclen, &patmbs); if (pclen == (size_t) -1) return (FNM_NOMATCH); pattern[pclen] = '\0'; sclen = mbsnrtowci (string, &in_string, (size_t) -1, sclen, &strmbs); if (sclen == (size_t) -1) return (FNM_NOMATCH); string[sclen] = '\0'; bt_pattern = bt_string = NULL; for (;;) { pc = pattern++; sc = string; switch (*pc) { case EOS: if ((flags & FNM_LEADING_DIR) && *sc == '/') return (0); if (*sc == EOS) return (0); goto backtrack; case '?': if (*sc == EOS) return (FNM_NOMATCH); if (*sc == '/' && (flags & FNM_PATHNAME)) goto backtrack; if (*sc == '.' && (flags & FNM_PERIOD) && (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) goto backtrack; ++string; break; case '*': c = pattern; /* Collapse multiple stars. */ while (*c == '*') *c = *++pattern; if (*sc == '.' && (flags & FNM_PERIOD) && (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) goto backtrack; /* Optimize for pattern with * at end or before /. */ if (*c == EOS) if (flags & FNM_PATHNAME) return ((flags & FNM_LEADING_DIR) || wcichr(string, '/') == NULL ? 0 : FNM_NOMATCH); else return (0); else if (*c == '/' && flags & FNM_PATHNAME) { if ((string = wcichr(string, '/')) == NULL) return (FNM_NOMATCH); break; } /* * First try the shortest match for the '*' that * could work. We can forget any earlier '*' since * there is no way having it match more characters * can help us, given that we are already here. */ bt_pattern = pattern; bt_patmbs = patmbs; bt_string = string; bt_strmbs = strmbs; break; case '[': if (*sc == EOS) return (FNM_NOMATCH); if (*sc == '/' && (flags & FNM_PATHNAME)) goto backtrack; if (*sc == '.' && (flags & FNM_PERIOD) && (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) goto backtrack; int ret = rangematch(pattern, sc, flags, &newp, &patmbs); switch (ret) { case RANGE_ERROR: goto norm; case RANGE_NOMATCH: goto backtrack; default: /* > 0 ... case RANGE_MATCH */ pattern = newp; break; } string += ret; break; case '\\': if (!(flags & FNM_NOESCAPE)) { pc = pattern++; } fallthrough; default: norm: ++string; if (*pc == *sc) ; else if ((flags & FNM_CASEFOLD) && (towlower(*pc) == towlower(*sc))) ; else { backtrack: /* * If we have a mismatch (other than hitting * the end of the string), go back to the last * '*' seen and have it match one additional * character. */ if (bt_pattern == NULL) return (FNM_NOMATCH); sc = (wint_t *) bt_string; if (*sc == EOS) return (FNM_NOMATCH); if (*sc == '/' && flags & FNM_PATHNAME) return (FNM_NOMATCH); ++bt_string; pattern = (wint_t *) bt_pattern; patmbs = bt_patmbs; string = (wint_t *) bt_string; strmbs = bt_strmbs; } break; } } /* NOTREACHED */ } /* Return value is either '\0', ':', '.', '=', or '[' if no class expression found. cptr_p is set to the next character which needs checking. */ static inline wint_t check_classes_expr(const wint_t **cptr_p, wint_t *classbuf, size_t classbufsize) { const wint_t *ctype = NULL; const wint_t *cptr = *cptr_p; if (*cptr == '[' && (cptr[1] == ':' || cptr[1] == '.' || cptr[1] == '=')) { ctype = ++cptr; while (*++cptr && (*cptr != *ctype || cptr[1] != ']')) ; if (!*cptr) return '\0'; if (classbuf) { const wint_t *class_p = ctype + 1; size_t clen = cptr - class_p; if (clen < classbufsize) *wcipncpy (classbuf, class_p, clen) = '\0'; else ctype = NULL; } cptr += 2; /* Advance cptr to next char after class expr. */ } *cptr_p = cptr; return ctype ? *ctype : '['; } static int rangematch(const wint_t *pattern, wint_t *test, int flags, wint_t **newp, mbstate_t *patmbs) { int negate, ok; wint_t *c, *c2; //size_t pclen; const wint_t *origpat; size_t tlen = next_unicode_char (test); /* * A bracket expression starting with an unquoted circumflex * character produces unspecified results (IEEE 1003.2-1992, * 3.13.2). This implementation treats it like '!', for * consistency with the regular expression syntax. * J.T. Conklin (conklin@ngai.kaleida.com) */ if ( (negate = (*pattern == '!' || *pattern == '^')) ) ++pattern; if (flags & FNM_CASEFOLD) { for (int idx = 0; idx < tlen; ++idx) test[idx] = towlower(test[idx]); } /* * A right bracket shall lose its special meaning and represent * itself in a bracket expression if it occurs first in the list. * -- POSIX.2 2.8.3.2 */ ok = 0; origpat = pattern; for (;;) { wint_t wclass[64], wclass2[64]; char cclass[64]; wint_t ctype; size_t clen = 1, c2len = 1; if (*pattern == ']' && pattern > origpat) { pattern++; break; } else if (*pattern == '\0') { return (RANGE_ERROR); } else if (*pattern == '/' && (flags & FNM_PATHNAME)) { return (RANGE_NOMATCH); } else if (*pattern == '\\' && !(flags & FNM_NOESCAPE)) pattern++; switch (ctype = check_classes_expr (&pattern, wclass, 64)) { case ':': /* No worries, char classes are ASCII-only */ wcitoascii (cclass, wclass); if (iswctype (*test, wctype (cclass))) ok = 1; continue; case '=': if (wcilen (wclass) == 1 && is_unicode_equiv (*test, *wclass)) ok = 1; continue; case '.': if (!is_unicode_coll_elem (wclass)) return (RANGE_NOMATCH); c = wclass; clen = wcilen (wclass); break; default: c = (wint_t *) pattern++; break; } if (flags & FNM_CASEFOLD) { for (int idx = 0; idx < tlen; ++idx) c[idx] = towlower(c[idx]); } if (*pattern == '-' && *(pattern + 1) != EOS && *(pattern + 1) != ']') { if (*++pattern == '\\' && !(flags & FNM_NOESCAPE)) if (*pattern != EOS) pattern++; const wint_t *orig_pattern = pattern; switch (ctype = check_classes_expr (&pattern, wclass2, 64)) { case '.': if (!is_unicode_coll_elem (wclass2)) return (RANGE_NOMATCH); c2 = wclass2; c2len = wcilen (wclass2); break; default: pattern = orig_pattern; c2 = (wint_t *) pattern++; } if (*c2 == EOS) return (RANGE_ERROR); if (flags & FNM_CASEFOLD) { for (int idx = 0; idx < tlen; ++idx) c2[idx] = towlower(c2[idx]); } if ((!__get_current_collate_locale ()->win_locale[0]) ? *c <= *test && *test <= *c2 : __wscollate_range_cmp(c, test, clen, tlen) <= 0 && __wscollate_range_cmp(test, c2, tlen, c2len) <= 0 ) ok = 1; } else if (clen == tlen && wcincmp (c, test, clen) == 0) ok = 1; } *newp = (wint_t *) pattern; return (ok == negate ? RANGE_NOMATCH : tlen); }