source/lib/ms_fnmatch.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    filename matching routine
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /*
  21    This module was originally based on fnmatch.c copyright by the Free
  22    Software Foundation. It bears little resemblence to that code now
  23 */
  24
  25
  26 #if FNMATCH_TEST
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #else
  30 #include "includes.h"
  31 #endif
  32
  33 /*
  34    bugger. we need a separate wildcard routine for older versions
  35    of the protocol. This is not yet perfect, but its a lot
  36    better than what we had */
  37 static int ms_fnmatch_lanman_core(const smb_ucs2_t *pattern,
  38                                   const smb_ucs2_t *string,
  39                                   BOOL case_sensitive)
  40 {
  41         const smb_ucs2_t *p = pattern, *n = string;
  42         smb_ucs2_t c;
  43
  44         if (strcmp_wa(p, "?")==0 && strcmp_wa(n, ".")) goto match;
  45
  46         while ((c = *p++)) {
  47                 switch (c) {
  48                 case UCS2_CHAR('.'):
  49                         if (! *n) goto next;
  50                         if (*n != UCS2_CHAR('.')) goto nomatch;
  51                         n++;
  52                         break;
  53
  54                 case UCS2_CHAR('?'):
  55                         if (! *n) goto next;
  56                         if ((*n == UCS2_CHAR('.') &&
  57                              n[1] != UCS2_CHAR('.')) || ! *n)
  58                                 goto next;
  59                         n++;
  60                         break;
  61
  62                 case UCS2_CHAR('>'):
  63                         if (! *n) goto next;
  64                         if (n[0] == UCS2_CHAR('.')) {
  65                                 if (! n[1] && ms_fnmatch_lanman_core(p, n+1, case_sensitive) == 0) goto match;
  66                                 if (ms_fnmatch_lanman_core(p, n, case_sensitive) == 0) goto match;
  67                                 goto nomatch;
  68                         }
  69                         n++;
  70                         break;
  71
  72                 case UCS2_CHAR('*'):
  73                         if (! *n) goto next;
  74                         if (! *p) goto match;
  75                         for (; *n; n++) {
  76                                 if (ms_fnmatch_lanman_core(p, n, case_sensitive) == 0) goto match;
  77                         }
  78                         break;
  79
  80                 case UCS2_CHAR('<'):
  81                         for (; *n; n++) {
  82                                 if (ms_fnmatch_lanman_core(p, n, case_sensitive) == 0) goto match;
  83                                 if (*n == UCS2_CHAR('.') &&
  84                                     !strchr_w(n+1,UCS2_CHAR('.'))) {
  85                                         n++;
  86                                         break;
  87                                 }
  88                         }
  89                         break;
  90
  91                 case UCS2_CHAR('"'):
  92                         if (*n == 0 && ms_fnmatch_lanman_core(p, n, case_sensitive) == 0) goto match;
  93                         if (*n != UCS2_CHAR('.')) goto nomatch;
  94                         n++;
  95                         break;
  96
  97                 default:
  98                         if (case_sensitive) {
  99                                 if (c != *n) goto nomatch;
 100                         } else {
 101                                 if (tolower_w(c) != tolower_w(*n)) goto nomatch;
 102                         }
 103                         n++;
 104                 }
 105         }
 106
 107         if (! *n) goto match;
 108
 109  nomatch:
 110         /*
 111         if (verbose) printf("NOMATCH pattern=[%s] string=[%s]\n", pattern, string);
 112         */
 113         return -1;
 114
 115 next:
 116         if (ms_fnmatch_lanman_core(p, n, case_sensitive) == 0) goto match;
 117         goto nomatch;
 118
 119  match:
 120         /*
 121         if (verbose) printf("MATCH   pattern=[%s] string=[%s]\n", pattern, string);
 122         */
 123         return 0;
 124 }
 125
 126 static int ms_fnmatch_lanman1(const smb_ucs2_t *pattern,
 127                               const smb_ucs2_t *string, BOOL case_sensitive)
 128 {
 129         if (!strpbrk_wa(pattern, "?*<>\"")) {
 130                 smb_ucs2_t s[] = {UCS2_CHAR('.'), 0};
 131                 if (strcmp_wa(string,"..") == 0) string = s;
 132                 return strcasecmp_w(pattern, string);
 133         }
 134
 135         if (strcmp_wa(string,"..") == 0 || strcmp_wa(string,".") == 0) {
 136                 smb_ucs2_t dot[] = {UCS2_CHAR('.'), 0};
 137                 smb_ucs2_t dotdot[] = {UCS2_CHAR('.'), UCS2_CHAR('.'), 0};
 138                 return ms_fnmatch_lanman_core(pattern, dotdot, case_sensitive) &&
 139                         ms_fnmatch_lanman_core(pattern, dot, case_sensitive);
 140         }
 141
 142         return ms_fnmatch_lanman_core(pattern, string, case_sensitive);
 143 }
 144
 145
 146 /* the following function was derived using the masktest utility -
 147    after years of effort we finally have a perfect MS wildcard
 148    matching routine!
 149
 150    NOTE: this matches only filenames with no directory component
 151
 152    Returns 0 on match, -1 on fail.
 153 */
 154 static int ms_fnmatch_w(const smb_ucs2_t *pattern, const smb_ucs2_t *string,
 155                         int protocol, BOOL case_sensitive)
 156 {
 157         const smb_ucs2_t *p = pattern, *n = string;
 158         smb_ucs2_t c;
 159
 160         if (protocol <= PROTOCOL_LANMAN2) {
 161                 return ms_fnmatch_lanman1(pattern, string, case_sensitive);
 162         }
 163
 164         while ((c = *p++)) {
 165                 switch (c) {
 166                 case UCS2_CHAR('?'):
 167                         if (! *n) return -1;
 168                         n++;
 169                         break;
 170
 171                 case UCS2_CHAR('>'):
 172                         if (n[0] == UCS2_CHAR('.')) {
 173                                 if (! n[1] && ms_fnmatch_w(p, n+1, protocol, case_sensitive) == 0) return 0;
 174                                 if (ms_fnmatch_w(p, n, protocol, case_sensitive) == 0) return 0;
 175                                 return -1;
 176                         }
 177                         if (! *n) return ms_fnmatch_w(p, n, protocol, case_sensitive);
 178                         n++;
 179                         break;
 180
 181                 case UCS2_CHAR('*'):
 182                         for (; *n; n++) {
 183                                 if (ms_fnmatch_w(p, n, protocol, case_sensitive) == 0) return 0;
 184                         }
 185                         break;
 186
 187                 case UCS2_CHAR('<'):
 188                         for (; *n; n++) {
 189                                 if (ms_fnmatch_w(p, n, protocol, case_sensitive) == 0) return 0;
 190                                 if (*n == UCS2_CHAR('.') && !strchr_wa(n+1,'.')) {
 191                                         n++;
 192                                         break;
 193                                 }
 194                         }
 195                         break;
 196
 197                 case UCS2_CHAR('"'):
 198                         if (*n == 0 && ms_fnmatch_w(p, n, protocol, case_sensitive) == 0) return 0;
 199                         if (*n != UCS2_CHAR('.')) return -1;
 200                         n++;
 201                         break;
 202
 203                 default:
 204                         if (case_sensitive) {
 205                                 if (c != *n) return -1;
 206                         } else {
 207                                 if (tolower_w(c) != tolower_w(*n)) return -1;
 208                         }
 209                         n++;
 210                 }
 211         }
 212
 213         if (! *n) return 0;
 214
 215         return -1;
 216 }
 217
 218 int ms_fnmatch(const char *pattern, const char *string, int protocol,
 219                BOOL case_senstive)
 220 {
 221         wpstring buffer_pattern, buffer_string;
 222         int ret;
 223         size_t size;
 224
 225         size = push_ucs2(NULL, buffer_pattern, pattern, sizeof(buffer_pattern), STR_TERMINATE);
 226         if (size == (size_t)-1) {
 227                 return -1;
 228                 /* Not quite the right answer, but finding the right one
 229                    under this failure case is expensive, and it's pretty close */
 230         }
 231
 232         size = push_ucs2(NULL, buffer_string, string, sizeof(buffer_string), STR_TERMINATE);
 233         if (size == (size_t)-1) {
 234                 return -1;
 235                 /* Not quite the right answer, but finding the right one
 236                    under this failure case is expensive, and it's pretty close */
 237         }
 238
 239         ret = ms_fnmatch_w(buffer_pattern, buffer_string, protocol, case_senstive);
 240         DEBUG(10,("ms_fnmatch(%s,%s) -> %d\n", pattern, string, ret));
 241
 242         return ret;
 243 }
 244
 245 /* a generic fnmatch function - uses for non-CIFS pattern matching */
 246 int gen_fnmatch(const char *pattern, const char *string)
 247 {
 248         return ms_fnmatch(pattern, string, PROTOCOL_NT1, True);
 249 }