1 /* $OpenBSD: cd9660_util.c,v 1.9 2015/03/14 03:38:50 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/file.h> 47 #include <sys/stat.h> 48 #include <sys/buf.h> 49 #include <sys/conf.h> 50 #include <sys/mount.h> 51 #include <sys/vnode.h> 52 #include <sys/malloc.h> 53 #include <sys/dirent.h> 54 55 #include <isofs/cd9660/iso.h> 56 57 /* 58 * XXX: limited support for loading of Unicode 59 * conversion routine as a kld at a run-time. 60 * Should be removed when native Unicode kernel 61 * interfaces have been introduced. 62 */ 63 u_char (*cd9660_wchar2char)(u_int32_t wchar) = NULL; 64 65 /* 66 * Get one character out of an iso filename 67 * Obey joliet_level 68 * Return number of bytes consumed 69 */ 70 int 71 isochar(isofn, isoend, joliet_level, c) 72 const u_char *isofn; 73 const u_char *isoend; 74 int joliet_level; 75 u_char *c; 76 { 77 *c = *isofn++; 78 if (joliet_level == 0 || isofn == isoend) 79 /* (00) and (01) are one byte in Joliet, too */ 80 return 1; 81 82 /* No Unicode support yet :-( */ 83 switch (*c) { 84 default: 85 *c = '?'; 86 break; 87 case '\0': 88 *c = *isofn; 89 break; 90 } 91 92 /* XXX: if Unicode conversion routine is loaded then use it */ 93 if (cd9660_wchar2char != NULL) 94 *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn); 95 96 return 2; 97 } 98 99 /* 100 * translate and compare a filename 101 * returns (fn - isofn) 102 * Note: Version number plus ';' may be omitted. 103 */ 104 int 105 isofncmp(fn, fnlen, isofn, isolen, joliet_level) 106 const u_char *fn, *isofn; 107 int fnlen, isolen, joliet_level; 108 { 109 int i, j; 110 u_char c; 111 const u_char *fnend = fn + fnlen, *isoend = isofn + isolen; 112 113 for (; fn != fnend; fn++) { 114 if (isofn == isoend) 115 return *fn; 116 isofn += isochar(isofn, isoend, joliet_level, &c); 117 if (c == ';') { 118 if (*fn++ != ';') 119 return fn[-1]; 120 for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') { 121 if (*fn < '0' || *fn > '9') { 122 return -1; 123 } 124 } 125 for (j = 0; isofn != isoend; j = j * 10 + c - '0') 126 isofn += isochar(isofn, isoend, 127 joliet_level, &c); 128 return i - j; 129 } 130 if (((u_char) c) != *fn) { 131 if (c >= 'A' && c <= 'Z') { 132 if (c + ('a' - 'A') != *fn) { 133 if (*fn >= 'a' && *fn <= 'z') 134 return *fn - ('a' - 'A') - c; 135 else 136 return *fn - c; 137 } 138 } else 139 return *fn - c; 140 } 141 } 142 if (isofn != isoend) { 143 isofn += isochar(isofn, isoend, joliet_level, &c); 144 switch (c) { 145 default: 146 return -c; 147 case '.': 148 if (isofn != isoend) { 149 isochar(isofn, isoend, joliet_level, &c); 150 if (c == ';') 151 return 0; 152 } 153 return -1; 154 case ';': 155 return 0; 156 } 157 } 158 return 0; 159 } 160 161 /* 162 * translate a filename of length > 0 163 */ 164 void 165 isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level) 166 u_char *infn, *outfn; 167 int infnlen; 168 u_short *outfnlen; 169 int original; 170 int assoc; 171 int joliet_level; 172 { 173 int fnidx = 0; 174 u_char c, d = '\0', *infnend = infn + infnlen; 175 176 if (assoc) { 177 *outfn++ = ASSOCCHAR; 178 fnidx++; 179 } 180 for (; infn != infnend; fnidx++) { 181 infn += isochar(infn, infnend, joliet_level, &c); 182 183 if (!original && c == ';') { 184 fnidx -= (d == '.'); 185 break; 186 } else 187 *outfn++ = c; 188 d = c; 189 } 190 *outfnlen = fnidx; 191 } 192