1/* 2 * Copyright (c) 1989, 1993, 1994 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 * Copyright (c) 2011 The FreeBSD Foundation 9 * All rights reserved. 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#if defined(LIBC_SCCS) && !defined(lint) 39static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 40#endif /* LIBC_SCCS and not lint */ 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD$"); 43 44/* 45 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 46 * Compares a filename or pathname to a pattern. 47 */ 48 49/* 50 * Some notes on multibyte character support: 51 * 1. Patterns with illegal byte sequences match nothing. 52 * 2. Illegal byte sequences in the "string" argument are handled by treating 53 * them as single-byte characters with a value of the first byte of the 54 * sequence cast to wchar_t. 55 * 3. Multibyte conversion state objects (mbstate_t) are passed around and 56 * used for most, but not all, conversions. Further work will be required 57 * to support state-dependent encodings. 58 */ 59 60#include <fnmatch.h> 61#include <limits.h> 62#include <string.h> 63#include <wchar.h> 64#include <wctype.h> 65 66#include "collate.h" 67 68#define EOS '\0' 69 70#define RANGE_MATCH 1 71#define RANGE_NOMATCH 0 72#define RANGE_ERROR (-1) 73 74static int rangematch(const char *, wchar_t, int, char **, mbstate_t *); 75static int fnmatch1(const char *, const char *, const char *, int, mbstate_t, 76 mbstate_t); 77 78int 79fnmatch(pattern, string, flags) 80 const char *pattern, *string; 81 int flags; 82{ 83 static const mbstate_t initial; 84 85 return (fnmatch1(pattern, string, string, flags, initial, initial)); 86} 87 88static int 89fnmatch1(pattern, string, stringstart, flags, patmbs, strmbs) 90 const char *pattern, *string, *stringstart; 91 int flags; 92 mbstate_t patmbs, strmbs; 93{ 94 char *newp; 95 char c; 96 wchar_t pc, sc; 97 size_t pclen, sclen; 98 99 for (;;) { 100 pclen = mbrtowc(&pc, pattern, MB_LEN_MAX, &patmbs); 101 if (pclen == (size_t)-1 || pclen == (size_t)-2) 102 return (FNM_NOMATCH); 103 pattern += pclen; 104 sclen = mbrtowc(&sc, string, MB_LEN_MAX, &strmbs); 105 if (sclen == (size_t)-1 || sclen == (size_t)-2) { 106 sc = (unsigned char)*string; 107 sclen = 1; 108 memset(&strmbs, 0, sizeof(strmbs)); 109 } 110 switch (pc) { 111 case EOS: 112 if ((flags & FNM_LEADING_DIR) && sc == '/') 113 return (0); 114 return (sc == EOS ? 0 : FNM_NOMATCH); 115 case '?': 116 if (sc == EOS) 117 return (FNM_NOMATCH); 118 if (sc == '/' && (flags & FNM_PATHNAME)) 119 return (FNM_NOMATCH); 120 if (sc == '.' && (flags & FNM_PERIOD) && 121 (string == stringstart || 122 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 123 return (FNM_NOMATCH); 124 string += sclen; 125 break; 126 case '*': 127 c = *pattern; 128 /* Collapse multiple stars. */ 129 while (c == '*') 130 c = *++pattern; 131 132 if (sc == '.' && (flags & FNM_PERIOD) && 133 (string == stringstart || 134 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 135 return (FNM_NOMATCH); 136 137 /* Optimize for pattern with * at end or before /. */ 138 if (c == EOS) 139 if (flags & FNM_PATHNAME) 140 return ((flags & FNM_LEADING_DIR) || 141 strchr(string, '/') == NULL ? 142 0 : FNM_NOMATCH); 143 else 144 return (0); 145 else if (c == '/' && flags & FNM_PATHNAME) { 146 if ((string = strchr(string, '/')) == NULL) 147 return (FNM_NOMATCH); 148 break; 149 } 150 151 /* General case, use recursion. */ 152 while (sc != EOS) { 153 if (!fnmatch1(pattern, string, stringstart, 154 flags, patmbs, strmbs)) 155 return (0); 156 sclen = mbrtowc(&sc, string, MB_LEN_MAX, 157 &strmbs); 158 if (sclen == (size_t)-1 || 159 sclen == (size_t)-2) { 160 sc = (unsigned char)*string; 161 sclen = 1; 162 memset(&strmbs, 0, sizeof(strmbs)); 163 } 164 if (sc == '/' && flags & FNM_PATHNAME) 165 break; 166 string += sclen; 167 } 168 return (FNM_NOMATCH); 169 case '[': 170 if (sc == EOS) 171 return (FNM_NOMATCH); 172 if (sc == '/' && (flags & FNM_PATHNAME)) 173 return (FNM_NOMATCH); 174 if (sc == '.' && (flags & FNM_PERIOD) && 175 (string == stringstart || 176 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 177 return (FNM_NOMATCH); 178 179 switch (rangematch(pattern, sc, flags, &newp, 180 &patmbs)) { 181 case RANGE_ERROR: 182 goto norm; 183 case RANGE_MATCH: 184 pattern = newp; 185 break; 186 case RANGE_NOMATCH: 187 return (FNM_NOMATCH); 188 } 189 string += sclen; 190 break; 191 case '\\': 192 if (!(flags & FNM_NOESCAPE)) { 193 pclen = mbrtowc(&pc, pattern, MB_LEN_MAX, 194 &patmbs); 195 if (pclen == (size_t)-1 || pclen == (size_t)-2) 196 return (FNM_NOMATCH); 197 pattern += pclen; 198 } 199 /* FALLTHROUGH */ 200 default: 201 norm: 202 if (pc == sc) 203 ; 204 else if ((flags & FNM_CASEFOLD) && 205 (towlower(pc) == towlower(sc))) 206 ; 207 else 208 return (FNM_NOMATCH); 209 string += sclen; 210 break; 211 } 212 } 213 /* NOTREACHED */ 214} 215 216static int 217rangematch(pattern, test, flags, newp, patmbs) 218 const char *pattern; 219 wchar_t test; 220 int flags; 221 char **newp; 222 mbstate_t *patmbs; 223{ 224 int negate, ok; 225 wchar_t c, c2; 226 size_t pclen; 227 const char *origpat; 228 struct xlocale_collate *table = 229 (struct xlocale_collate*)__get_locale()->components[XLC_COLLATE]; 230 231 /* 232 * A bracket expression starting with an unquoted circumflex 233 * character produces unspecified results (IEEE 1003.2-1992, 234 * 3.13.2). This implementation treats it like '!', for 235 * consistency with the regular expression syntax. 236 * J.T. Conklin (conklin@ngai.kaleida.com) 237 */ 238 if ( (negate = (*pattern == '!' || *pattern == '^')) ) 239 ++pattern; 240 241 if (flags & FNM_CASEFOLD) 242 test = towlower(test); 243 244 /* 245 * A right bracket shall lose its special meaning and represent 246 * itself in a bracket expression if it occurs first in the list. 247 * -- POSIX.2 2.8.3.2 248 */ 249 ok = 0; 250 origpat = pattern; 251 for (;;) { 252 if (*pattern == ']' && pattern > origpat) { 253 pattern++; 254 break; 255 } else if (*pattern == '\0') { 256 return (RANGE_ERROR); 257 } else if (*pattern == '/' && (flags & FNM_PATHNAME)) { 258 return (RANGE_NOMATCH); 259 } else if (*pattern == '\\' && !(flags & FNM_NOESCAPE)) 260 pattern++; 261 pclen = mbrtowc(&c, pattern, MB_LEN_MAX, patmbs); 262 if (pclen == (size_t)-1 || pclen == (size_t)-2) 263 return (RANGE_NOMATCH); 264 pattern += pclen; 265 266 if (flags & FNM_CASEFOLD) 267 c = towlower(c); 268 269 if (*pattern == '-' && *(pattern + 1) != EOS && 270 *(pattern + 1) != ']') { 271 if (*++pattern == '\\' && !(flags & FNM_NOESCAPE)) 272 if (*pattern != EOS) 273 pattern++; 274 pclen = mbrtowc(&c2, pattern, MB_LEN_MAX, patmbs); 275 if (pclen == (size_t)-1 || pclen == (size_t)-2) 276 return (RANGE_NOMATCH); 277 pattern += pclen; 278 if (c2 == EOS) 279 return (RANGE_ERROR); 280 281 if (flags & FNM_CASEFOLD) 282 c2 = towlower(c2); 283 284 if (table->__collate_load_error ? 285 c <= test && test <= c2 : 286 __collate_range_cmp(table, c, test) <= 0 287 && __collate_range_cmp(table, test, c2) <= 0 288 ) 289 ok = 1; 290 } else if (c == test) 291 ok = 1; 292 } 293 294 *newp = (char *)pattern; 295 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 296} 297