Line data Source code
1 : /* $OpenBSD: cd9660_util.c,v 1.10 2017/12/30 20:47:00 guenther 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 0 : isochar(isofn, isoend, joliet_level, c)
71 : const u_char *isofn;
72 : const u_char *isoend;
73 : int joliet_level;
74 : u_char *c;
75 : {
76 0 : *c = *isofn++;
77 0 : if (joliet_level == 0 || isofn == isoend)
78 : /* (00) and (01) are one byte in Joliet, too */
79 0 : return 1;
80 :
81 : /* No Unicode support yet :-( */
82 0 : switch (*c) {
83 : default:
84 0 : *c = '?';
85 0 : break;
86 : case '\0':
87 0 : *c = *isofn;
88 0 : break;
89 : }
90 :
91 : /* XXX: if Unicode conversion routine is loaded then use it */
92 0 : if (cd9660_wchar2char != NULL)
93 0 : *c = cd9660_wchar2char((*(isofn - 1) << 8) | *isofn);
94 :
95 0 : return 2;
96 0 : }
97 :
98 : /*
99 : * translate and compare a filename
100 : * returns (fn - isofn)
101 : * Note: Version number plus ';' may be omitted.
102 : */
103 : int
104 0 : isofncmp(fn, fnlen, isofn, isolen, joliet_level)
105 : const u_char *fn, *isofn;
106 : int fnlen, isolen, joliet_level;
107 : {
108 : int i, j;
109 0 : u_char c;
110 0 : const u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
111 :
112 0 : for (; fn != fnend; fn++) {
113 0 : if (isofn == isoend)
114 0 : return *fn;
115 0 : isofn += isochar(isofn, isoend, joliet_level, &c);
116 0 : if (c == ';') {
117 0 : if (*fn++ != ';')
118 0 : return fn[-1];
119 0 : for (i = 0; fn != fnend; i = i * 10 + *fn++ - '0') {
120 0 : if (*fn < '0' || *fn > '9') {
121 0 : return -1;
122 : }
123 : }
124 0 : for (j = 0; isofn != isoend; j = j * 10 + c - '0')
125 0 : isofn += isochar(isofn, isoend,
126 : joliet_level, &c);
127 0 : return i - j;
128 : }
129 0 : if (((u_char) c) != *fn) {
130 0 : if (c >= 'A' && c <= 'Z') {
131 0 : if (c + ('a' - 'A') != *fn) {
132 0 : if (*fn >= 'a' && *fn <= 'z')
133 0 : return *fn - ('a' - 'A') - c;
134 : else
135 0 : return *fn - c;
136 : }
137 : } else
138 0 : return *fn - c;
139 : }
140 : }
141 0 : if (isofn != isoend) {
142 0 : isofn += isochar(isofn, isoend, joliet_level, &c);
143 0 : switch (c) {
144 : default:
145 0 : return -c;
146 : case '.':
147 0 : if (isofn != isoend) {
148 0 : isochar(isofn, isoend, joliet_level, &c);
149 0 : if (c == ';')
150 0 : return 0;
151 : }
152 0 : return -1;
153 : case ';':
154 0 : return 0;
155 : }
156 : }
157 0 : return 0;
158 0 : }
159 :
160 : /*
161 : * translate a filename of length > 0
162 : */
163 : void
164 0 : isofntrans(infn, infnlen, outfn, outfnlen, original, assoc, joliet_level)
165 : u_char *infn, *outfn;
166 : int infnlen;
167 : u_short *outfnlen;
168 : int original;
169 : int assoc;
170 : int joliet_level;
171 : {
172 : int fnidx = 0;
173 0 : u_char c, d = '\0', *infnend = infn + infnlen;
174 :
175 0 : if (assoc) {
176 0 : *outfn++ = ASSOCCHAR;
177 : fnidx++;
178 0 : }
179 0 : for (; infn != infnend; fnidx++) {
180 0 : infn += isochar(infn, infnend, joliet_level, &c);
181 :
182 0 : if (!original && c == ';') {
183 0 : fnidx -= (d == '.');
184 0 : break;
185 : } else
186 0 : *outfn++ = c;
187 0 : d = c;
188 : }
189 0 : *outfnlen = fnidx;
190 0 : }
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