/* $OpenBSD: fnmatch.c,v 1.13 2006/03/31 05:34:14 deraadt Exp $ */ /* * 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. * * 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. * 3. 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. */ /* * Function fnmatch() as specified in POSIX 1003.2-1992, section B.6. * Compares a filename or pathname to a pattern. */ #include #include #include #include #define EOS '\0' #define RANGE_MATCH 1 #define RANGE_NOMATCH 0 #define RANGE_ERROR (-1) static int rangematch(const char *, char, int, char **); int fnmatch(const char *pattern, const char *string, int flags) { const char *stringstart; char *newp; char c, test; for (stringstart = string;;) switch (c = *pattern++) { case EOS: if ((flags & FNM_LEADING_DIR) && *string == '/') return (0); return (*string == EOS ? 0 : FNM_NOMATCH); case '?': if (*string == EOS) return (FNM_NOMATCH); if (*string == '/' && (flags & FNM_PATHNAME)) return (FNM_NOMATCH); if (*string == '.' && (flags & FNM_PERIOD) && (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) return (FNM_NOMATCH); ++string; break; case '*': c = *pattern; /* Collapse multiple stars. */ while (c == '*') c = *++pattern; if (*string == '.' && (flags & FNM_PERIOD) && (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) return (FNM_NOMATCH); /* Optimize for pattern with * at end or before /. */ if (c == EOS) { if (flags & FNM_PATHNAME) return ((flags & FNM_LEADING_DIR) || strchr(string, '/') == NULL ? 0 : FNM_NOMATCH); else return (0); } else if (c == '/' && (flags & FNM_PATHNAME)) { if ((string = strchr(string, '/')) == NULL) return (FNM_NOMATCH); break; } /* General case, use recursion. */ while ((test = *string) != EOS) { if (!fnmatch(pattern, string, flags & ~FNM_PERIOD)) return (0); if (test == '/' && (flags & FNM_PATHNAME)) break; ++string; } return (FNM_NOMATCH); case '[': if (*string == EOS) return (FNM_NOMATCH); if (*string == '/' && (flags & FNM_PATHNAME)) return (FNM_NOMATCH); if (*string == '.' && (flags & FNM_PERIOD) && (string == stringstart || ((flags & FNM_PATHNAME) && *(string - 1) == '/'))) return (FNM_NOMATCH); switch (rangematch(pattern, *string, flags, &newp)) { case RANGE_ERROR: /* not a good range, treat as normal text */ goto normal; case RANGE_MATCH: pattern = newp; break; case RANGE_NOMATCH: return (FNM_NOMATCH); } ++string; break; case '\\': if (!(flags & FNM_NOESCAPE)) { if ((c = *pattern++) == EOS) { c = '\\'; --pattern; } } /* FALLTHROUGH */ default: normal: if (c != *string && !((flags & FNM_CASEFOLD) && (tolower((unsigned char)c) == tolower((unsigned char)*string)))) return (FNM_NOMATCH); ++string; break; } /* NOTREACHED */ } static int rangematch(const char *pattern, char test, int flags, char **newp) { int negate, ok; char c, c2; /* * 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) test = (char)tolower((unsigned char)test); /* * 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; c = *pattern++; do { if (c == '\\' && !(flags & FNM_NOESCAPE)) c = *pattern++; if (c == EOS) return (RANGE_ERROR); if (c == '/' && (flags & FNM_PATHNAME)) return (RANGE_NOMATCH); if ((flags & FNM_CASEFOLD)) c = (char)tolower((unsigned char)c); if (*pattern == '-' && (c2 = *(pattern+1)) != EOS && c2 != ']') { pattern += 2; if (c2 == '\\' && !(flags & FNM_NOESCAPE)) c2 = *pattern++; if (c2 == EOS) return (RANGE_ERROR); if (flags & FNM_CASEFOLD) c2 = (char)tolower((unsigned char)c2); if (c <= test && test <= c2) ok = 1; } else if (c == test) ok = 1; } while ((c = *pattern++) != ']'); *newp = (char *)pattern; return (ok == negate ? RANGE_NOMATCH : RANGE_MATCH); }