1 /* $OpenBSD: fnmatch.c,v 1.7 2000/03/23 19:13:51 millert Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Guido van Rossum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #if defined(LIBC_SCCS) && !defined(lint) 40 #if 0 41 static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 42 #else 43 static char rcsid[] = "$OpenBSD: fnmatch.c,v 1.7 2000/03/23 19:13:51 millert Exp $"; 44 #endif 45 #endif /* LIBC_SCCS and not lint */ 46 47 /* 48 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 49 * Compares a filename or pathname to a pattern. 50 */ 51 52 #include <ctype.h> 53 #include <stdio.h> 54 #include <string.h> 55 #include <fnmatch.h> 56 57 #define EOS '\0' 58 59 #define RANGE_MATCH 1 60 #define RANGE_NOMATCH 0 61 #define RANGE_ERROR (-1) 62 63 static int rangematch __P((const char *, char, int, char **)); 64 65 int 66 fnmatch(pattern, string, flags) 67 const char *pattern, *string; 68 int flags; 69 { 70 const char *stringstart; 71 char *newp; 72 char c, test; 73 74 for (stringstart = string;;) 75 switch (c = *pattern++) { 76 case EOS: 77 if ((flags & FNM_LEADING_DIR) && *string == '/') 78 return (0); 79 return (*string == EOS ? 0 : FNM_NOMATCH); 80 case '?': 81 if (*string == EOS) 82 return (FNM_NOMATCH); 83 if (*string == '/' && (flags & FNM_PATHNAME)) 84 return (FNM_NOMATCH); 85 if (*string == '.' && (flags & FNM_PERIOD) && 86 (string == stringstart || 87 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 88 return (FNM_NOMATCH); 89 ++string; 90 break; 91 case '*': 92 c = *pattern; 93 /* Collapse multiple stars. */ 94 while (c == '*') 95 c = *++pattern; 96 97 if (*string == '.' && (flags & FNM_PERIOD) && 98 (string == stringstart || 99 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 100 return (FNM_NOMATCH); 101 102 /* Optimize for pattern with * at end or before /. */ 103 if (c == EOS) { 104 if (flags & FNM_PATHNAME) 105 return ((flags & FNM_LEADING_DIR) || 106 strchr(string, '/') == NULL ? 107 0 : FNM_NOMATCH); 108 else 109 return (0); 110 } else if (c == '/' && (flags & FNM_PATHNAME)) { 111 if ((string = strchr(string, '/')) == NULL) 112 return (FNM_NOMATCH); 113 break; 114 } 115 116 /* General case, use recursion. */ 117 while ((test = *string) != EOS) { 118 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 119 return (0); 120 if (test == '/' && (flags & FNM_PATHNAME)) 121 break; 122 ++string; 123 } 124 return (FNM_NOMATCH); 125 case '[': 126 if (*string == EOS) 127 return (FNM_NOMATCH); 128 if (*string == '/' && (flags & FNM_PATHNAME)) 129 return (FNM_NOMATCH); 130 if (*string == '.' && (flags & FNM_PERIOD) && 131 (string == stringstart || 132 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 133 return (FNM_NOMATCH); 134 135 switch (rangematch(pattern, *string, flags, &newp)) { 136 case RANGE_ERROR: 137 /* not a good range, treat as normal text */ 138 goto normal; 139 case RANGE_MATCH: 140 pattern = newp; 141 break; 142 case RANGE_NOMATCH: 143 return (FNM_NOMATCH); 144 } 145 ++string; 146 break; 147 case '\\': 148 if (!(flags & FNM_NOESCAPE)) { 149 if ((c = *pattern++) == EOS) { 150 c = '\\'; 151 --pattern; 152 } 153 } 154 /* FALLTHROUGH */ 155 default: 156 normal: 157 if (c != *string && !((flags & FNM_CASEFOLD) && 158 (tolower((unsigned char)c) == 159 tolower((unsigned char)*string)))) 160 return (FNM_NOMATCH); 161 ++string; 162 break; 163 } 164 /* NOTREACHED */ 165 } 166 167 static int 168 #ifdef __STDC__ 169 rangematch(const char *pattern, char test, int flags, char **newp) 170 #else 171 rangematch(pattern, test, flags, newp) 172 char *pattern; 173 char test; 174 int flags; 175 char **newp; 176 #endif 177 { 178 int negate, ok; 179 char c, c2; 180 181 /* 182 * A bracket expression starting with an unquoted circumflex 183 * character produces unspecified results (IEEE 1003.2-1992, 184 * 3.13.2). This implementation treats it like '!', for 185 * consistency with the regular expression syntax. 186 * J.T. Conklin (conklin@ngai.kaleida.com) 187 */ 188 if ((negate = (*pattern == '!' || *pattern == '^'))) 189 ++pattern; 190 191 if (flags & FNM_CASEFOLD) 192 test = tolower((unsigned char)test); 193 194 /* 195 * A right bracket shall lose its special meaning and represent 196 * itself in a bracket expression if it occurs first in the list. 197 * -- POSIX.2 2.8.3.2 198 */ 199 ok = 0; 200 c = *pattern++; 201 do { 202 if (c == '\\' && !(flags & FNM_NOESCAPE)) 203 c = *pattern++; 204 if (c == EOS) 205 return (RANGE_ERROR); 206 if (c == '/' && (flags & FNM_PATHNAME)) 207 return (RANGE_NOMATCH); 208 if ((flags & FNM_CASEFOLD)) 209 c = tolower((unsigned char)c); 210 if (*pattern == '-' 211 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 212 pattern += 2; 213 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 214 c2 = *pattern++; 215 if (c2 == EOS) 216 return (RANGE_ERROR); 217 if (flags & FNM_CASEFOLD) 218 c2 = tolower((unsigned char)c2); 219 if (c <= test && test <= c2) 220 ok = 1; 221 } else if (c == test) 222 ok = 1; 223 } while ((c = *pattern++) != ']'); 224 225 *newp = (char *)pattern; 226 return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); 227 } 228