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 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/mount.h>
44 #include <sys/vnode.h>
45 #include <sys/iconv.h>
46
47 #include <fs/cd9660/iso.h>
48 #include <fs/cd9660/cd9660_mount.h>
49
50 extern struct iconv_functions *cd9660_iconv;
51
52 /*
53 * Get one character out of an iso filename
54 * Obey joliet_level
55 * Return number of bytes consumed
56 */
57 int
isochar(u_char * isofn,u_char * isoend,int joliet_level,u_short * c,int * clen,int flags,void * handle)58 isochar(u_char *isofn, u_char *isoend, int joliet_level, u_short *c, int *clen,
59 int flags, void *handle)
60 {
61 size_t i, j, len;
62 char inbuf[3], outbuf[3], *inp, *outp;
63
64 *c = *isofn++;
65 if (clen) *clen = 1;
66 if (joliet_level == 0 || isofn == isoend)
67 /* (00) and (01) are one byte in Joliet, too */
68 return 1;
69
70 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
71 i = j = len = 2;
72 inbuf[0]=(char)*(isofn - 1);
73 inbuf[1]=(char)*isofn;
74 inbuf[2]='\0';
75 inp = inbuf;
76 outp = outbuf;
77 cd9660_iconv->convchr(handle, __DECONST(const char **, &inp), &i,
78 &outp, &j);
79 len -= j;
80 if (clen) *clen = len;
81 *c = '\0';
82 while(len--)
83 *c |= (*(outp - len - 1) & 0xff) << (len << 3);
84 } else {
85 switch (*c) {
86 default:
87 *c = '?';
88 break;
89 case '\0':
90 *c = *isofn;
91 break;
92 }
93 }
94
95 return 2;
96 }
97
98 /*
99 * translate and compare a filename
100 * returns (fn - isofn)
101 * Note: Version number plus ';' may be omitted.
102 */
103 int
isofncmp(u_char * fn,int fnlen,u_char * isofn,int isolen,int joliet_level,int flags,void * handle,void * lhandle)104 isofncmp(u_char *fn, int fnlen, u_char *isofn, int isolen, int joliet_level,
105 int flags, void *handle, void *lhandle)
106 {
107 int i, j;
108 u_short c, d;
109 u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
110
111 for (; fn < fnend; ) {
112 d = sgetrune(fn, fnend - fn, __DECONST(const char **, &fn),
113 flags, lhandle);
114 if (isofn == isoend)
115 return d;
116 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
117 if (c == ';') {
118 if (d != ';')
119 return d;
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 NULL, flags, handle);
129 return i - j;
130 }
131 if (c != d) {
132 if (c >= 'A' && c <= 'Z') {
133 if (c + ('a' - 'A') != d) {
134 if (d >= 'a' && d <= 'z')
135 return d - ('a' - 'A') - c;
136 else
137 return d - c;
138 }
139 } else
140 return d - c;
141 }
142 }
143 if (isofn != isoend) {
144 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
145 switch (c) {
146 default:
147 return -c;
148 case '.':
149 if (isofn != isoend) {
150 isochar(isofn, isoend, joliet_level, &c,
151 NULL, flags, handle);
152 if (c == ';')
153 return 0;
154 }
155 return -1;
156 case ';':
157 return 0;
158 }
159 }
160 return 0;
161 }
162
163 /*
164 * translate a filename of length > 0
165 */
166 void
isofntrans(u_char * infn,int infnlen,u_char * outfn,u_short * outfnlen,int original,int assoc,int joliet_level,int flags,void * handle)167 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen,
168 int original, int assoc, int joliet_level, int flags, void *handle)
169 {
170 u_short c, d = '\0';
171 u_char *outp = outfn, *infnend = infn + infnlen;
172 int clen;
173
174 if (assoc) {
175 *outp++ = ASSOCCHAR;
176 }
177 for (; infn != infnend; ) {
178 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle);
179
180 if (!original && !joliet_level && c >= 'A' && c <= 'Z')
181 c += ('a' - 'A');
182 else if (!original && c == ';') {
183 outp -= (d == '.');
184 break;
185 }
186 d = c;
187 while(clen--)
188 *outp++ = c >> (clen << 3);
189 }
190 *outfnlen = outp - outfn;
191 }
192
193 /*
194 * same as sgetrune(3)
195 */
196 u_short
sgetrune(const char * string,size_t n,char const ** result,int flags,void * handle)197 sgetrune(const char *string, size_t n, char const **result, int flags,
198 void *handle)
199 {
200 size_t i, j, len;
201 char outbuf[3], *outp;
202 u_short c = '\0';
203
204 len = i = (n < 2) ? n : 2;
205 j = 2;
206 outp = outbuf;
207
208 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
209 cd9660_iconv->convchr(handle, (const char **)&string,
210 &i, &outp, &j);
211 len -= i;
212 } else {
213 len = 1;
214 string++;
215 }
216
217 if (result) *result = string;
218 while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3);
219 return (c);
220 }
221