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 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 35 * Use is subject to license terms. 36 */ 37 38 /* 39 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 40 * Compares a filename or pathname to a pattern. 41 */ 42 43 /* 44 * Some notes on multibyte character support: 45 * 1. Patterns with illegal byte sequences match nothing. 46 * 2. Illegal byte sequences in the "string" argument are handled by treating 47 * them as single-byte characters with a value of the first byte of the 48 * sequence cast to wchar_t. 49 * 3. Multibyte conversion state objects (mbstate_t) are passed around and 50 * used for most, but not all, conversions. Further work will be required 51 * to support state-dependent encodings. 52 */ 53 54 #include "lint.h" 55 #include <fnmatch.h> 56 #include <limits.h> 57 #include <string.h> 58 #include <wchar.h> 59 #include <wctype.h> 60 61 #include "collate.h" 62 63 #define EOS '\0' 64 65 #define RANGE_MATCH 1 66 #define RANGE_NOMATCH 0 67 #define RANGE_ERROR (-1) 68 69 static int rangematch(const char *, wchar_t, int, char **, mbstate_t *); 70 static int fnmatch1(const char *, const char *, const char *, int, mbstate_t, 71 mbstate_t); 72 73 int 74 fnmatch(pattern, string, flags) 75 const char *pattern, *string; 76 int flags; 77 { 78 static const mbstate_t initial = { 0 }; 79 80 return (fnmatch1(pattern, string, string, flags, initial, initial)); 81 } 82 83 static int 84 fnmatch1(const char *pattern, const char *string, const char *stringstart, 85 int flags, mbstate_t patmbs, mbstate_t strmbs) 86 { 87 char *newp; 88 char c; 89 wchar_t pc, sc; 90 size_t pclen, sclen; 91 92 for (;;) { 93 pclen = mbrtowc(&pc, pattern, MB_LEN_MAX, &patmbs); 94 if (pclen == (size_t)-1 || pclen == (size_t)-2) 95 return (FNM_NOMATCH); 96 pattern += pclen; 97 sclen = mbrtowc(&sc, string, MB_LEN_MAX, &strmbs); 98 if (sclen == (size_t)-1 || sclen == (size_t)-2) { 99 sc = (unsigned char)*string; 100 sclen = 1; 101 (void) memset(&strmbs, 0, sizeof (strmbs)); 102 } 103 switch (pc) { 104 case EOS: 105 /* 106 * Removed FNM_LEADING_DIR, as it is not present 107 * on Solaris. 108 */ 109 return (sc == EOS ? 0 : FNM_NOMATCH); 110 case '?': 111 if (sc == EOS) 112 return (FNM_NOMATCH); 113 if (sc == '/' && (flags & FNM_PATHNAME)) 114 return (FNM_NOMATCH); 115 if (sc == '.' && (flags & FNM_PERIOD) && 116 (string == stringstart || 117 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 118 return (FNM_NOMATCH); 119 string += sclen; 120 break; 121 case '*': 122 c = *pattern; 123 /* Collapse multiple stars. */ 124 while (c == '*') 125 c = *++pattern; 126 127 if (sc == '.' && (flags & FNM_PERIOD) && 128 (string == stringstart || 129 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 130 return (FNM_NOMATCH); 131 132 /* Optimize for pattern with * at end or before /. */ 133 if (c == EOS) 134 if (flags & FNM_PATHNAME) 135 return (strchr(string, '/') == NULL ? 136 0 : FNM_NOMATCH); 137 else 138 return (0); 139 else if (c == '/' && flags & FNM_PATHNAME) { 140 if ((string = strchr(string, '/')) == NULL) 141 return (FNM_NOMATCH); 142 break; 143 } 144 145 /* General case, use recursion. */ 146 while (sc != EOS) { 147 if (!fnmatch1(pattern, string, stringstart, 148 flags, patmbs, strmbs)) 149 return (0); 150 sclen = mbrtowc(&sc, string, MB_LEN_MAX, 151 &strmbs); 152 if (sclen == (size_t)-1 || 153 sclen == (size_t)-2) { 154 sc = (unsigned char)*string; 155 sclen = 1; 156 (void) memset(&strmbs, 0, 157 sizeof (strmbs)); 158 } 159 if (sc == '/' && flags & FNM_PATHNAME) 160 break; 161 string += sclen; 162 } 163 return (FNM_NOMATCH); 164 case '[': 165 if (sc == EOS) 166 return (FNM_NOMATCH); 167 if (sc == '/' && (flags & FNM_PATHNAME)) 168 return (FNM_NOMATCH); 169 if (sc == '.' && (flags & FNM_PERIOD) && 170 (string == stringstart || 171 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 172 return (FNM_NOMATCH); 173 174 switch (rangematch(pattern, sc, flags, &newp, 175 &patmbs)) { 176 case RANGE_ERROR: 177 goto norm; 178 case RANGE_MATCH: 179 pattern = newp; 180 break; 181 case RANGE_NOMATCH: 182 return (FNM_NOMATCH); 183 } 184 string += sclen; 185 break; 186 case '\\': 187 if (!(flags & FNM_NOESCAPE)) { 188 pclen = mbrtowc(&pc, pattern, MB_LEN_MAX, 189 &patmbs); 190 if (pclen == (size_t)-1 || pclen == (size_t)-2) 191 return (FNM_NOMATCH); 192 if (pclen == 0) 193 pc = '\\'; 194 pattern += pclen; 195 } 196 /* FALLTHROUGH */ 197 default: 198 norm: 199 if (pc == sc) 200 string += sclen; 201 202 else if ((flags & FNM_IGNORECASE) && 203 (towlower(pc) == towlower(sc))) 204 string += sclen; 205 else 206 return (FNM_NOMATCH); 207 208 break; 209 } 210 } 211 /* NOTREACHED */ 212 } 213 214 static int 215 rangematch(pattern, test, flags, newp, patmbs) 216 const char *pattern; 217 wchar_t test; 218 int flags; 219 char **newp; 220 mbstate_t *patmbs; 221 { 222 int negate, ok; 223 wchar_t c, c2; 224 size_t pclen; 225 const char *origpat; 226 227 /* 228 * A bracket expression starting with an unquoted circumflex 229 * character produces unspecified results (IEEE 1003.2-1992, 230 * 3.13.2). This implementation treats it like '!', for 231 * consistency with the regular expression syntax. 232 * J.T. Conklin (conklin@ngai.kaleida.com) 233 */ 234 if ((negate = (*pattern == '!' || *pattern == '^')) != 0) 235 ++pattern; 236 237 if (flags & FNM_IGNORECASE) 238 test = towlower(test); 239 240 /* 241 * A right bracket shall lose its special meaning and represent 242 * itself in a bracket expression if it occurs first in the list. 243 * -- POSIX.2 2.8.3.2 244 */ 245 ok = 0; 246 origpat = pattern; 247 for (;;) { 248 if (*pattern == ']' && pattern > origpat) { 249 pattern++; 250 break; 251 } else if (*pattern == '\0') { 252 return (RANGE_ERROR); 253 } else if (*pattern == '/' && (flags & FNM_PATHNAME)) { 254 return (RANGE_NOMATCH); 255 } else if (*pattern == '\\' && !(flags & FNM_NOESCAPE)) 256 pattern++; 257 pclen = mbrtowc(&c, pattern, MB_LEN_MAX, patmbs); 258 if (pclen == (size_t)-1 || pclen == (size_t)-2) 259 return (RANGE_NOMATCH); 260 pattern += pclen; 261 262 if (flags & FNM_IGNORECASE) 263 c = towlower(c); 264 265 if (*pattern == '-' && *(pattern + 1) != EOS && 266 *(pattern + 1) != ']') { 267 if (*++pattern == '\\' && !(flags & FNM_NOESCAPE)) 268 if (*pattern != EOS) 269 pattern++; 270 pclen = mbrtowc(&c2, pattern, MB_LEN_MAX, patmbs); 271 if (pclen == (size_t)-1 || pclen == (size_t)-2) 272 return (RANGE_NOMATCH); 273 pattern += pclen; 274 if (c2 == EOS) 275 return (RANGE_ERROR); 276 277 if (flags & FNM_IGNORECASE) 278 c2 = towlower(c2); 279 280 if (_collate_load_error ? 281 c <= test && test <= c2 : 282 _collate_range_cmp(c, test) <= 0 && 283 _collate_range_cmp(test, c2) <= 0) 284 ok = 1; 285 } else if (c == test) 286 ok = 1; 287 } 288 289 *newp = (char *)pattern; 290 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 291 } 292