1 /* $OpenBSD: cd9660_util.c,v 1.11 2021/03/05 07:01:36 jsg Exp $ */ 2 /* $NetBSD: cd9660_util.c,v 1.12 1997/01/24 00:27:33 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley 9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 10 * Support code is derived from software contributed to Berkeley 11 * by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by 12 * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de). 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/namei.h> 44 #include <sys/resourcevar.h> 45 #include <sys/kernel.h> 46 #include <sys/stat.h> 47 #include <sys/buf.h> 48 #include <sys/conf.h> 49 #include <sys/mount.h> 50 #include <sys/vnode.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 54 #include <isofs/cd9660/iso.h> 55 56 /* 57 * XXX: limited support for loading of Unicode 58 * conversion routine as a kld at a run-time. 59 * Should be removed when native Unicode kernel 60 * interfaces have been introduced. 61 */ 62 u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL; 63 64 /* 65 * Get one character out of an iso filename 66 * Obey joliet_level 67 * Return number of bytes consumed 68 */ 69 int 70 isochar(const u_char *isofn, const u_char *isoend, int joliet_level, u_char *c) 71 { 72 *c = *isofn++; 73 if (joliet_level == 0 || isofn == isoend) 74 /* (00) and (01) are one byte in Joliet, too */ 75 return 1; 76 77 /* No Unicode support yet :-( */ 78 switch (*c) { 79 default: 80 *c = '?'; 81 break; 82 case '\0': 83 *c = *isofn; 84 break; 85 } 86 87 /* XXX: if Unicode conversion routine is loaded then use it */ 88 if (cd9660_wchar2char != NULL) 89 *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn); 90 91 return 2; 92 } 93 94 /* 95 * translate and compare a filename 96 * returns (fn - isofn) 97 * Note: Version number plus ';' may be omitted. 98 */ 99 int 100 isofncmp(const u_char *fn, int fnlen, const u_char *isofn, int isolen, 101 int joliet_level) 102 { 103 int i, j; 104 u_char c; 105 const u_char *fnend = fn + fnlen, *isoend = isofn + isolen; 106 107 for (; fn != fnend; fn++) { 108 if (isofn == isoend) 109 return *fn; 110 isofn += isochar(isofn, isoend, joliet_level, &c); 111 if (c == ';') { 112 if (*fn++ != ';') 113 return fn[-1]; 114 for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') { 115 if (*fn < '0' || *fn > '9') { 116 return -1; 117 } 118 } 119 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 120 isofn += isochar(isofn, isoend, 121 joliet_level, &c); 122 return i - j; 123 } 124 if (((u_char) c) != *fn) { 125 if (c >= 'A' && c <= 'Z') { 126 if (c + ('a' - 'A') != *fn) { 127 if (*fn >= 'a' && *fn <= 'z') 128 return *fn - ('a' - 'A') - c; 129 else 130 return *fn - c; 131 } 132 } else 133 return *fn - c; 134 } 135 } 136 if (isofn != isoend) { 137 isofn += isochar(isofn, isoend, joliet_level, &c); 138 switch (c) { 139 default: 140 return -c; 141 case '.': 142 if (isofn != isoend) { 143 isochar(isofn, isoend, joliet_level, &c); 144 if (c == ';') 145 return 0; 146 } 147 return -1; 148 case ';': 149 return 0; 150 } 151 } 152 return 0; 153 } 154 155 /* 156 * translate a filename of length > 0 157 */ 158 void 159 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen, 160 int original, int assoc, int joliet_level) 161 { 162 int fnidx = 0; 163 u_char c, d = '\0', *infnend = infn + infnlen; 164 165 if (assoc) { 166 *outfn++ = ASSOCCHAR; 167 fnidx++; 168 } 169 for (; infn != infnend; fnidx++) { 170 infn += isochar(infn, infnend, joliet_level, &c); 171 172 if (!original && c == ';') { 173 fnidx -= (d == '.'); 174 break; 175 } else 176 *outfn++ = c; 177 d = c; 178 } 179 *outfnlen = fnidx; 180 } 181