1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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). Joliet support was added by 11 * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/mount.h> 46 #include <sys/vnode.h> 47 #include <sys/iconv.h> 48 49 #include <fs/cd9660/iso.h> 50 #include <fs/cd9660/cd9660_mount.h> 51 52 extern struct iconv_functions *cd9660_iconv; 53 54 /* 55 * Get one character out of an iso filename 56 * Obey joliet_level 57 * Return number of bytes consumed 58 */ 59 int 60 isochar(u_char *isofn, u_char *isoend, int joliet_level, u_short *c, int *clen, 61 int flags, void *handle) 62 { 63 size_t i, j, len; 64 char inbuf[3], outbuf[3], *inp, *outp; 65 66 *c = *isofn++; 67 if (clen) *clen = 1; 68 if (joliet_level == 0 || isofn == isoend) 69 /* (00) and (01) are one byte in Joliet, too */ 70 return 1; 71 72 if (flags & ISOFSMNT_KICONV && cd9660_iconv) { 73 i = j = len = 2; 74 inbuf[0]=(char)*(isofn - 1); 75 inbuf[1]=(char)*isofn; 76 inbuf[2]='\0'; 77 inp = inbuf; 78 outp = outbuf; 79 cd9660_iconv->convchr(handle, __DECONST(const char **, &inp), &i, 80 &outp, &j); 81 len -= j; 82 if (clen) *clen = len; 83 *c = '\0'; 84 while(len--) 85 *c |= (*(outp - len - 1) & 0xff) << (len << 3); 86 } else { 87 switch (*c) { 88 default: 89 *c = '?'; 90 break; 91 case '\0': 92 *c = *isofn; 93 break; 94 } 95 } 96 97 return 2; 98 } 99 100 /* 101 * translate and compare a filename 102 * returns (fn - isofn) 103 * Note: Version number plus ';' may be omitted. 104 */ 105 int 106 isofncmp(u_char *fn, int fnlen, u_char *isofn, int isolen, int joliet_level, 107 int flags, void *handle, void *lhandle) 108 { 109 int i, j; 110 u_short c, d; 111 u_char *fnend = fn + fnlen, *isoend = isofn + isolen; 112 113 for (; fn < fnend; ) { 114 d = sgetrune(fn, fnend - fn, __DECONST(const char **, &fn), 115 flags, lhandle); 116 if (isofn == isoend) 117 return d; 118 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle); 119 if (c == ';') { 120 if (d != ';') 121 return d; 122 for (i = 0; fn < fnend; i = i * 10 + *fn++ - '0') { 123 if (*fn < '0' || *fn > '9') { 124 return -1; 125 } 126 } 127 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 128 isofn += isochar(isofn, isoend, 129 joliet_level, &c, 130 NULL, flags, handle); 131 return i - j; 132 } 133 if (c != d) { 134 if (c >= 'A' && c <= 'Z') { 135 if (c + ('a' - 'A') != d) { 136 if (d >= 'a' && d <= 'z') 137 return d - ('a' - 'A') - c; 138 else 139 return d - c; 140 } 141 } else 142 return d - c; 143 } 144 } 145 if (isofn != isoend) { 146 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle); 147 switch (c) { 148 default: 149 return -c; 150 case '.': 151 if (isofn != isoend) { 152 isochar(isofn, isoend, joliet_level, &c, 153 NULL, flags, handle); 154 if (c == ';') 155 return 0; 156 } 157 return -1; 158 case ';': 159 return 0; 160 } 161 } 162 return 0; 163 } 164 165 /* 166 * translate a filename of length > 0 167 */ 168 void 169 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen, 170 int original, int assoc, int joliet_level, int flags, void *handle) 171 { 172 u_short c, d = '\0'; 173 u_char *outp = outfn, *infnend = infn + infnlen; 174 int clen; 175 176 if (assoc) { 177 *outp++ = ASSOCCHAR; 178 } 179 for (; infn != infnend; ) { 180 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle); 181 182 if (!original && !joliet_level && c >= 'A' && c <= 'Z') 183 c += ('a' - 'A'); 184 else if (!original && c == ';') { 185 outp -= (d == '.'); 186 break; 187 } 188 d = c; 189 while(clen--) 190 *outp++ = c >> (clen << 3); 191 } 192 *outfnlen = outp - outfn; 193 } 194 195 /* 196 * same as sgetrune(3) 197 */ 198 u_short 199 sgetrune(const char *string, size_t n, char const **result, int flags, 200 void *handle) 201 { 202 size_t i, j, len; 203 char outbuf[3], *outp; 204 u_short c = '\0'; 205 206 len = i = (n < 2) ? n : 2; 207 j = 2; 208 outp = outbuf; 209 210 if (flags & ISOFSMNT_KICONV && cd9660_iconv) { 211 cd9660_iconv->convchr(handle, (const char **)&string, 212 &i, &outp, &j); 213 len -= i; 214 } else { 215 len = 1; 216 string++; 217 } 218 219 if (result) *result = string; 220 while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3); 221 return (c); 222 } 223