1 /* $NetBSD: cd9660_util.c,v 1.16 2024/05/25 06:27:57 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace (at) blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai (at) spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 37 */ 38 39 #include <sys/cdefs.h> 40 #ifdef _KERNEL 41 __KERNEL_RCSID(0, "$NetBSD: cd9660_util.c,v 1.16 2024/05/25 06:27:57 tsutsui Exp $"); 42 #else 43 /* used by macppc_installboot */ 44 #if HAVE_NBTOOL_CONFIG_H 45 #include "nbtool_config.h" 46 #endif 47 #endif 48 49 #include <sys/param.h> 50 #ifdef _KERNEL 51 #include <sys/systm.h> 52 #include <sys/namei.h> 53 #include <sys/resourcevar.h> 54 #include <sys/kernel.h> 55 #include <sys/file.h> 56 #include <sys/stat.h> 57 #include <sys/buf.h> 58 #include <sys/proc.h> 59 #include <sys/mount.h> 60 #include <sys/vnode.h> 61 #include <sys/dirent.h> 62 #else 63 #include <assert.h> 64 #include <dirent.h> 65 #define KASSERT(x) assert(x) /* XXX for <fs/unicode.h> */ 66 67 #if !HAVE_NBTOOL_CONFIG_H || HAVE_SYS_ENDIAN_H 68 #include <sys/endian.h> /* for le16dec(9) etc. in iso.h */ 69 #endif 70 #endif 71 72 #include <fs/cd9660/iso.h> 73 #include <fs/cd9660/cd9660_extern.h> 74 75 #include <fs/unicode.h> 76 77 static uint16_t wget(const u_char **, size_t *, int); 78 static int wput(u_char *, size_t, uint16_t, int); 79 80 int cd9660_utf8_joliet = 1; 81 82 /* 83 * Get one character out of an iso filename 84 * Return number of bytes consumed 85 */ 86 int 87 isochar(const u_char *isofn, const u_char *isoend, int joliet_level, 88 uint16_t *c) 89 { 90 91 *c = isofn[0]; 92 if (joliet_level == 0 || isofn + 1 == isoend) { 93 /* (00) and (01) are one byte in Joliet, too */ 94 return 1; 95 } 96 97 if (cd9660_utf8_joliet) { 98 *c = (*c << 8) + isofn[1]; 99 } else { 100 /* characters outside ISO-8859-1 subset replaced with '?' */ 101 if (*c != 0) 102 *c = '?'; 103 else 104 *c = isofn[1]; 105 } 106 107 return 2; 108 } 109 110 /* 111 * translate and compare a filename 112 * Note: Version number plus ';' may be omitted. 113 */ 114 int 115 isofncmp(const u_char *fn, size_t fnlen, const u_char *isofn, size_t isolen, 116 int joliet_level) 117 { 118 int i, j; 119 uint16_t fc, ic; 120 const u_char *isoend = isofn + isolen; 121 122 #ifdef ISOFNCMPDEBUG 123 printf("fn = %s, fnlen = %zu, isofn = %s, isolen = %zu\n", 124 fn, fnlen, isofn, isolen); 125 #endif 126 127 while (fnlen > 0) { 128 fc = wget(&fn, &fnlen, joliet_level); 129 130 if (isofn == isoend) 131 return fc; 132 isofn += isochar(isofn, isoend, joliet_level, &ic); 133 if (ic == ';') { 134 switch (fc) { 135 default: 136 return fc; 137 case 0: 138 return 0; 139 case ';': 140 break; 141 } 142 for (i = 0; fnlen-- != 0; i = i * 10 + *fn++ - '0') { 143 if (*fn < '0' || *fn > '9') { 144 return -1; 145 } 146 } 147 for (j = 0; isofn != isoend; j = j * 10 + ic - '0') 148 isofn += isochar(isofn, isoend, 149 joliet_level, &ic); 150 return i - j; 151 } 152 if (ic != fc) { 153 if (ic >= 'A' && ic <= 'Z') { 154 if (ic + ('a' - 'A') != fc) { 155 if (fc >= 'a' && fc <= 'z') 156 fc -= 'a' - 'A'; 157 158 return (int)fc - (int)ic; 159 } 160 } else 161 return (int)fc - (int)ic; 162 } 163 } 164 if (isofn != isoend) { 165 isofn += isochar(isofn, isoend, joliet_level, &ic); 166 switch (ic) { 167 default: 168 return -1; 169 case '.': 170 if (isofn != isoend) { 171 isochar(isofn, isoend, joliet_level, &ic); 172 if (ic == ';') 173 return 0; 174 } 175 return -1; 176 case ';': 177 return 0; 178 } 179 } 180 return 0; 181 } 182 183 /* 184 * translate a filename 185 */ 186 void 187 isofntrans(const u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen, 188 int original, int casetrans, int assoc, int joliet_level) 189 { 190 int fnidx = 0; 191 const u_char *infnend = infn + infnlen; 192 uint16_t c; 193 int sz; 194 195 if (assoc) { 196 *outfn++ = ASSOCCHAR; 197 fnidx++; 198 } 199 200 for(; infn != infnend; fnidx += sz) { 201 infn += isochar(infn, infnend, joliet_level, &c); 202 203 if (casetrans && joliet_level == 0 && c >= 'A' && c <= 'Z') 204 c = c + ('a' - 'A'); 205 else if (!original && c == ';') { 206 if (fnidx > 0 && outfn[-1] == '.') 207 fnidx--; 208 break; 209 } 210 211 sz = wput(outfn, ISO_MAXNAMLEN - fnidx, c, joliet_level); 212 if (sz == 0) { 213 /* not enough space to write the character */ 214 if (fnidx < ISO_MAXNAMLEN) { 215 *outfn = '?'; 216 fnidx++; 217 } 218 break; 219 } 220 outfn += sz; 221 } 222 *outfnlen = fnidx; 223 } 224 225 static uint16_t 226 wget(const u_char **str, size_t *sz, int joliet_level) 227 { 228 if (joliet_level > 0 && cd9660_utf8_joliet) { 229 /* decode UTF-8 sequence */ 230 return wget_utf8((const char **) str, sz); 231 } else { 232 /* 233 * Raw 8-bit characters without any conversion. For Joliet, 234 * this effectively assumes provided file name is using 235 * ISO-8859-1 subset. 236 */ 237 uint16_t c = *str[0]; 238 (*str)++; 239 (*sz)--; 240 241 return c; 242 } 243 } 244 245 static int 246 wput(u_char *s, size_t n, uint16_t c, int joliet_level) 247 { 248 if (joliet_level > 0 && cd9660_utf8_joliet) { 249 /* Store Joliet file name encoded into UTF-8 */ 250 return wput_utf8((char *)s, n, c); 251 } else { 252 /* 253 * Store raw 8-bit characters without any conversion. 254 * For Joliet case, this filters the Unicode characters 255 * to ISO-8859-1 subset. 256 */ 257 *s = (u_char)c; 258 return 1; 259 } 260 } 261
Indexes created Fri Sep 26 20:09:58 GMT 2025