1 /* $NetBSD: fnmatch.c,v 1.13 1997/07/21 14:06:58 jtc 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 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)fnmatch.c 8.2 (Berkeley) 4/16/94"; 43 #else 44 __RCSID("$NetBSD: fnmatch.c,v 1.13 1997/07/21 14:06:58 jtc Exp $"); 45 #endif 46 #endif /* LIBC_SCCS and not lint */ 47 48 /* 49 * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. 50 * Compares a filename or pathname to a pattern. 51 */ 52 53 #include "namespace.h" 54 #include <fnmatch.h> 55 #include <string.h> 56 57 #ifdef __weak_alias 58 __weak_alias(fnmatch,_fnmatch); 59 #endif 60 61 #define EOS '\0' 62 63 static const char *rangematch __P((const char *, int, int)); 64 65 int 66 fnmatch(pattern, string, flags) 67 const char *pattern, *string; 68 int flags; 69 { 70 const char *stringstart; 71 char c, test; 72 73 for (stringstart = string;;) 74 switch (c = *pattern++) { 75 case EOS: 76 return (*string == EOS ? 0 : FNM_NOMATCH); 77 case '?': 78 if (*string == EOS) 79 return (FNM_NOMATCH); 80 if (*string == '/' && (flags & FNM_PATHNAME)) 81 return (FNM_NOMATCH); 82 if (*string == '.' && (flags & FNM_PERIOD) && 83 (string == stringstart || 84 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 85 return (FNM_NOMATCH); 86 ++string; 87 break; 88 case '*': 89 c = *pattern; 90 /* Collapse multiple stars. */ 91 while (c == '*') 92 c = *++pattern; 93 94 if (*string == '.' && (flags & FNM_PERIOD) && 95 (string == stringstart || 96 ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) 97 return (FNM_NOMATCH); 98 99 /* Optimize for pattern with * at end or before /. */ 100 if (c == EOS) 101 if (flags & FNM_PATHNAME) 102 return (strchr(string, '/') == NULL ? 103 0 : FNM_NOMATCH); 104 else 105 return (0); 106 else if (c == '/' && flags & FNM_PATHNAME) { 107 if ((string = strchr(string, '/')) == NULL) 108 return (FNM_NOMATCH); 109 break; 110 } 111 112 /* General case, use recursion. */ 113 while ((test = *string) != EOS) { 114 if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) 115 return (0); 116 if (test == '/' && flags & FNM_PATHNAME) 117 break; 118 ++string; 119 } 120 return (FNM_NOMATCH); 121 case '[': 122 if (*string == EOS) 123 return (FNM_NOMATCH); 124 if (*string == '/' && flags & FNM_PATHNAME) 125 return (FNM_NOMATCH); 126 if ((pattern = 127 rangematch(pattern, *string, flags)) == NULL) 128 return (FNM_NOMATCH); 129 ++string; 130 break; 131 case '\\': 132 if (!(flags & FNM_NOESCAPE)) { 133 if ((c = *pattern++) == EOS) { 134 c = '\\'; 135 --pattern; 136 } 137 } 138 /* FALLTHROUGH */ 139 default: 140 if (c != *string++) 141 return (FNM_NOMATCH); 142 break; 143 } 144 /* NOTREACHED */ 145 } 146 147 static const char * 148 rangematch(pattern, test, flags) 149 const char *pattern; 150 int test, flags; 151 { 152 int negate, ok; 153 char c, c2; 154 155 /* 156 * A bracket expression starting with an unquoted circumflex 157 * character produces unspecified results (IEEE 1003.2-1992, 158 * 3.13.2). This implementation treats it like '!', for 159 * consistency with the regular expression syntax. 160 * J.T. Conklin (conklin@ngai.kaleida.com) 161 */ 162 if ((negate = (*pattern == '!' || *pattern == '^')) != 0) 163 ++pattern; 164 165 for (ok = 0; (c = *pattern++) != ']';) { 166 if (c == '\\' && !(flags & FNM_NOESCAPE)) 167 c = *pattern++; 168 if (c == EOS) 169 return (NULL); 170 if (*pattern == '-' 171 && (c2 = *(pattern+1)) != EOS && c2 != ']') { 172 pattern += 2; 173 if (c2 == '\\' && !(flags & FNM_NOESCAPE)) 174 c2 = *pattern++; 175 if (c2 == EOS) 176 return (NULL); 177 if (c <= test && test <= c2) 178 ok = 1; 179 } else if (c == test) 180 ok = 1; 181 } 182 return (ok == negate ? NULL : pattern); 183 } 184