| /* $OpenBSD: fnmatch.c,v 1.16 2011/12/06 11:47:46 stsp Exp $ */ |
| |
| /* Copyright (c) 2011, VMware, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of the VMware, Inc. 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 COPYRIGHT HOLDERS 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 VMWARE, INC. 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. |
| */ |
| |
| /* |
| * Copyright (c) 2008 Todd C. Miller <millert@openbsd.org> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* Authored by William A. Rowe Jr. <wrowe; apache.org, vmware.com>, April 2011 |
| * |
| * Derived from The Open Group Base Specifications Issue 7, IEEE Std 1003.1-2008 |
| * as described in; |
| * http://pubs.opengroup.org/onlinepubs/9699919799/functions/fnmatch.html |
| * |
| * Filename pattern matches defined in section 2.13, "Pattern Matching Notation" |
| * from chapter 2. "Shell Command Language" |
| * http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_13 |
| * where; 1. A bracket expression starting with an unquoted <circumflex> '^' |
| * character CONTINUES to specify a non-matching list; 2. an explicit <period> '.' |
| * in a bracket expression matching list, e.g. "[.abc]" does NOT match a leading |
| * <period> in a filename; 3. a <left-square-bracket> '[' which does not introduce |
| * a valid bracket expression is treated as an ordinary character; 4. a differing |
| * number of consecutive slashes within pattern and string will NOT match; |
| * 5. a trailing '\' in FNM_ESCAPE mode is treated as an ordinary '\' character. |
| * |
| * Bracket expansion defined in section 9.3.5, "RE Bracket Expression", |
| * from chapter 9, "Regular Expressions" |
| * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03_05 |
| * with no support for collating symbols, equivalence class expressions or |
| * character class expressions. A partial range expression with a leading |
| * hyphen following a valid range expression will match only the ordinary |
| * <hyphen> and the ending character (e.g. "[a-m-z]" will match characters |
| * 'a' through 'm', a <hyphen> '-', or a 'z'). |
| * |
| * Supports BSD extensions FNM_LEADING_DIR to match pattern to the end of one |
| * path segment of string, and FNM_CASEFOLD to ignore alpha case. |
| * |
| * NOTE: Only POSIX/C single byte locales are correctly supported at this time. |
| * Notably, non-POSIX locales with FNM_CASEFOLD produce undefined results, |
| * particularly in ranges of mixed case (e.g. "[A-z]") or spanning alpha and |
| * nonalpha characters within a range. |
| * |
| * XXX comments below indicate porting required for multi-byte character sets |
| * and non-POSIX locale collation orders; requires mbr* APIs to track shift |
| * state of pattern and string (rewinding pattern and string repeatedly). |
| * |
| * Certain parts of the code assume 0x00-0x3F are unique with any MBCS (e.g. |
| * UTF-8, SHIFT-JIS, etc). Any implementation allowing '\' as an alternate |
| * path delimiter must be aware that 0x5C is NOT unique within SHIFT-JIS. |
| */ |
| |
| #include <fnmatch.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <limits.h> |
| |
| #include "charclass.h" |
| |
| #define RANGE_MATCH 1 |
| #define RANGE_NOMATCH 0 |
| #define RANGE_ERROR (-1) |
| |
| static int |
| classmatch(const char *pattern, char test, int foldcase, const char **ep) |
| { |
| struct cclass *cc; |
| const char *colon; |
| size_t len; |
| int rval = RANGE_NOMATCH; |
| const char * const mismatch = pattern; |
| |
| if (*pattern != '[' || pattern[1] != ':') { |
| *ep = mismatch; |
| return(RANGE_ERROR); |
| } |
| |
| pattern += 2; |
| |
| if ((colon = strchr(pattern, ':')) == NULL || colon[1] != ']') { |
| *ep = mismatch; |
| return(RANGE_ERROR); |
| } |
| *ep = colon + 2; |
| len = (size_t)(colon - pattern); |
| |
| if (foldcase && strncmp(pattern, "upper:]", 7) == 0) |
| pattern = "lower:]"; |
| for (cc = cclasses; cc->name != NULL; cc++) { |
| if (!strncmp(pattern, cc->name, len) && cc->name[len] == '\0') { |
| if (cc->isctype((unsigned char)test)) |
| rval = RANGE_MATCH; |
| break; |
| } |
| } |
| if (cc->name == NULL) { |
| /* invalid character class, treat as normal text */ |
| *ep = mismatch; |
| rval = RANGE_ERROR; |
| } |
| return(rval); |
| } |
| |
| /* Most MBCS/collation/case issues handled here. Wildcard '*' is not handled. |
| * EOS '\0' and the FNM_PATHNAME '/' delimiters are not advanced over, |
| * however the "\/" sequence is advanced to '/'. |
| * |
| * Both pattern and string are **char to support pointer increment of arbitrary |
| * multibyte characters for the given locale, in a later iteration of this code |
| */ |
| static int fnmatch_ch(const char **pattern, const char **string, int flags) |
| { |
| const char * const mismatch = *pattern; |
| const int nocase = !!(flags & FNM_CASEFOLD); |
| const int escape = !(flags & FNM_NOESCAPE); |
| const int slash = !!(flags & FNM_PATHNAME); |
| int result = FNM_NOMATCH; |
| const char *startch; |
| int negate; |
| |
| if (**pattern == '[') |
| { |
| ++*pattern; |
| |
| /* Handle negation, either leading ! or ^ operators (never both) */ |
| negate = ((**pattern == '!') || (**pattern == '^')); |
| if (negate) |
| ++*pattern; |
| |
| /* ']' is an ordinary character at the start of the range pattern */ |
| if (**pattern == ']') |
| goto leadingclosebrace; |
| |
| while (**pattern) |
| { |
| if (**pattern == ']') { |
| ++*pattern; |
| /* XXX: Fix for MBCS character width */ |
| ++*string; |
| return (result ^ negate); |
| } |
| |
| if (escape && (**pattern == '\\')) { |
| ++*pattern; |
| |
| /* Patterns must be terminated with ']', not EOS */ |
| if (!**pattern) |
| break; |
| } |
| |
| /* Patterns must be terminated with ']' not '/' */ |
| if (slash && (**pattern == '/')) |
| break; |
| |
| /* Match character classes. */ |
| if (classmatch(*pattern, **string, nocase, pattern) |
| == RANGE_MATCH) { |
| result = 0; |
| continue; |
| } |
| |
| leadingclosebrace: |
| /* Look at only well-formed range patterns; |
| * "x-]" is not allowed unless escaped ("x-\]") |
| * XXX: Fix for locale/MBCS character width |
| */ |
| if (((*pattern)[1] == '-') && ((*pattern)[2] != ']')) |
| { |
| startch = *pattern; |
| *pattern += (escape && ((*pattern)[2] == '\\')) ? 3 : 2; |
| |
| /* NOT a properly balanced [expr] pattern, EOS terminated |
| * or ranges containing a slash in FNM_PATHNAME mode pattern |
| * fall out to to the rewind and test '[' literal code path |
| */ |
| if (!**pattern || (slash && (**pattern == '/'))) |
| break; |
| |
| /* XXX: handle locale/MBCS comparison, advance by MBCS char width */ |
| if ((**string >= *startch) && (**string <= **pattern)) |
| result = 0; |
| else if (nocase && (isupper(**string) || isupper(*startch) |
| || isupper(**pattern)) |
| && (tolower(**string) >= tolower(*startch)) |
| && (tolower(**string) <= tolower(**pattern))) |
| result = 0; |
| |
| ++*pattern; |
| continue; |
| } |
| |
| /* XXX: handle locale/MBCS comparison, advance by MBCS char width */ |
| if ((**string == **pattern)) |
| result = 0; |
| else if (nocase && (isupper(**string) || isupper(**pattern)) |
| && (tolower(**string) == tolower(**pattern))) |
| result = 0; |
| |
| ++*pattern; |
| } |
| |
| /* NOT a properly balanced [expr] pattern; Rewind |
| * and reset result to test '[' literal |
| */ |
| *pattern = mismatch; |
| result = FNM_NOMATCH; |
| } |
| else if (**pattern == '?') { |
| /* Optimize '?' match before unescaping **pattern */ |
| if (!**string || (slash && (**string == '/'))) |
| return FNM_NOMATCH; |
| result = 0; |
| goto fnmatch_ch_success; |
| } |
| else if (escape && (**pattern == '\\') && (*pattern)[1]) { |
| ++*pattern; |
| } |
| |
| /* XXX: handle locale/MBCS comparison, advance by the MBCS char width */ |
| if (**string == **pattern) |
| result = 0; |
| else if (nocase && (isupper(**string) || isupper(**pattern)) |
| && (tolower(**string) == tolower(**pattern))) |
| result = 0; |
| |
| /* Refuse to advance over trailing slash or nulls |
| */ |
| if (!**string || !**pattern || (slash && ((**string == '/') || (**pattern == '/')))) |
| return result; |
| |
| fnmatch_ch_success: |
| ++*pattern; |
| ++*string; |
| return result; |
| } |
| |
| |
| int fnmatch(const char *pattern, const char *string, int flags) |
| { |
| static const char dummystring[2] = {' ', 0}; |
| const int escape = !(flags & FNM_NOESCAPE); |
| const int slash = !!(flags & FNM_PATHNAME); |
| const int leading_dir = !!(flags & FNM_LEADING_DIR); |
| const char *strendseg; |
| const char *dummyptr; |
| const char *matchptr; |
| int wild; |
| /* For '*' wild processing only; surpress 'used before initialization' |
| * warnings with dummy initialization values; |
| */ |
| const char *strstartseg = NULL; |
| const char *mismatch = NULL; |
| int matchlen = 0; |
| |
| if (strnlen(pattern, PATH_MAX) == PATH_MAX || |
| strnlen(string, PATH_MAX) == PATH_MAX) |
| return (FNM_NOMATCH); |
| |
| if (*pattern == '*') |
| goto firstsegment; |
| |
| while (*pattern && *string) |
| { |
| /* Pre-decode "\/" which has no special significance, and |
| * match balanced slashes, starting a new segment pattern |
| */ |
| if (slash && escape && (*pattern == '\\') && (pattern[1] == '/')) |
| ++pattern; |
| if (slash && (*pattern == '/') && (*string == '/')) { |
| ++pattern; |
| ++string; |
| } |
| |
| firstsegment: |
| /* At the beginning of each segment, validate leading period behavior. |
| */ |
| if ((flags & FNM_PERIOD) && (*string == '.')) |
| { |
| if (*pattern == '.') |
| ++pattern; |
| else if (escape && (*pattern == '\\') && (pattern[1] == '.')) |
| pattern += 2; |
| else |
| return FNM_NOMATCH; |
| ++string; |
| } |
| |
| /* Determine the end of string segment |
| * |
| * Presumes '/' character is unique, not composite in any MBCS encoding |
| */ |
| if (slash) { |
| strendseg = strchr(string, '/'); |
| if (!strendseg) |
| strendseg = strchr(string, '\0'); |
| } |
| else { |
| strendseg = strchr(string, '\0'); |
| } |
| |
| /* Allow pattern '*' to be consumed even with no remaining string to match |
| */ |
| while (*pattern) |
| { |
| if ((string > strendseg) |
| || ((string == strendseg) && (*pattern != '*'))) |
| break; |
| |
| if (slash && ((*pattern == '/') |
| || (escape && (*pattern == '\\') |
| && (pattern[1] == '/')))) |
| break; |
| |
| /* Reduce groups of '*' and '?' to n '?' matches |
| * followed by one '*' test for simplicity |
| */ |
| for (wild = 0; ((*pattern == '*') || (*pattern == '?')); ++pattern) |
| { |
| if (*pattern == '*') { |
| wild = 1; |
| } |
| else if (string < strendseg) { /* && (*pattern == '?') */ |
| /* XXX: Advance 1 char for MBCS locale */ |
| ++string; |
| } |
| else { /* (string >= strendseg) && (*pattern == '?') */ |
| return FNM_NOMATCH; |
| } |
| } |
| |
| if (wild) |
| { |
| strstartseg = string; |
| mismatch = pattern; |
| |
| /* Count fixed (non '*') char matches remaining in pattern |
| * excluding '/' (or "\/") and '*' |
| */ |
| for (matchptr = pattern, matchlen = 0; 1; ++matchlen) |
| { |
| if ((*matchptr == '\0') |
| || (slash && ((*matchptr == '/') |
| || (escape && (*matchptr == '\\') |
| && (matchptr[1] == '/'))))) |
| { |
| /* Compare precisely this many trailing string chars, |
| * the resulting match needs no wildcard loop |
| */ |
| /* XXX: Adjust for MBCS */ |
| if (string + matchlen > strendseg) |
| return FNM_NOMATCH; |
| |
| string = strendseg - matchlen; |
| wild = 0; |
| break; |
| } |
| |
| if (*matchptr == '*') |
| { |
| /* Ensure at least this many trailing string chars remain |
| * for the first comparison |
| */ |
| /* XXX: Adjust for MBCS */ |
| if (string + matchlen > strendseg) |
| return FNM_NOMATCH; |
| |
| /* Begin first wild comparison at the current position */ |
| break; |
| } |
| |
| /* Skip forward in pattern by a single character match |
| * Use a dummy fnmatch_ch() test to count one "[range]" escape |
| */ |
| /* XXX: Adjust for MBCS */ |
| if (escape && (*matchptr == '\\') && matchptr[1]) { |
| matchptr += 2; |
| } |
| else if (*matchptr == '[') { |
| dummyptr = dummystring; |
| fnmatch_ch(&matchptr, &dummyptr, flags); |
| } |
| else { |
| ++matchptr; |
| } |
| } |
| } |
| |
| /* Incrementally match string against the pattern |
| */ |
| while (*pattern && (string < strendseg)) |
| { |
| /* Success; begin a new wild pattern search |
| */ |
| if (*pattern == '*') |
| break; |
| |
| if (slash && ((*string == '/') |
| || (*pattern == '/') |
| || (escape && (*pattern == '\\') |
| && (pattern[1] == '/')))) |
| break; |
| |
| /* Compare ch's (the pattern is advanced over "\/" to the '/', |
| * but slashes will mismatch, and are not consumed) |
| */ |
| if (!fnmatch_ch(&pattern, &string, flags)) |
| continue; |
| |
| /* Failed to match, loop against next char offset of string segment |
| * until not enough string chars remain to match the fixed pattern |
| */ |
| if (wild) { |
| /* XXX: Advance 1 char for MBCS locale */ |
| string = ++strstartseg; |
| if (string + matchlen > strendseg) |
| return FNM_NOMATCH; |
| |
| pattern = mismatch; |
| continue; |
| } |
| else |
| return FNM_NOMATCH; |
| } |
| } |
| |
| if (*string && !((slash || leading_dir) && (*string == '/'))) |
| return FNM_NOMATCH; |
| |
| if (*pattern && !(slash && ((*pattern == '/') |
| || (escape && (*pattern == '\\') |
| && (pattern[1] == '/'))))) |
| return FNM_NOMATCH; |
| |
| if (leading_dir && !*pattern && *string == '/') |
| return 0; |
| } |
| |
| /* Where both pattern and string are at EOS, declare success |
| */ |
| if (!*string && !*pattern) |
| return 0; |
| |
| /* pattern didn't match to the end of string */ |
| return FNM_NOMATCH; |
| } |
