| 1 | /* $NetBSD: cd9660_util.c,v 1.14 2016/03/09 20:18:17 christos 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@blitz.com). The Rock Ridge Extension |
| 9 | * Support code is derived from software contributed to Berkeley |
| 10 | * by Atsushi Murai (amurai@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 1.14 2016/03/09 20:18:17 christos 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 | #endif |
| 67 | |
| 68 | #include <fs/cd9660/iso.h> |
| 69 | #ifdef _KERNEL |
| 70 | #include <fs/cd9660/cd9660_extern.h> |
| 71 | #else |
| 72 | static int isochar(const u_char *, const u_char *, int, uint16_t *); |
| 73 | #endif |
| 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 | |