1 /*-
2 * Copyright (c) 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley
6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
7 * Support code is derived from software contributed to Berkeley
8 * by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by
9 * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de).
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
36 * $FreeBSD: src/sys/isofs/cd9660/cd9660_util.c,v 1.13.2.1 2001/02/27 12:36:34 sobomax Exp $
37 */
38
39 #include <sys/param.h>
40 #include <sys/mount.h>
41 #include <sys/vnode.h>
42 #include <sys/iconv.h>
43
44 #include "iso.h"
45 #include "cd9660_mount.h"
46
47 extern struct iconv_functions *cd9660_iconv;
48
49 /*
50 * Get one character out of an iso filename
51 * Obey joliet_level
52 * Return number of bytes consumed
53 */
54 int
isochar(u_char * isofn,u_char * isoend,int joliet_level,u_short * c,int * clen,int flags,void * handle)55 isochar(u_char *isofn, u_char *isoend, int joliet_level, u_short *c,
56 int *clen, int flags, void *handle)
57 {
58 size_t i, j, len;
59 char inbuf[3], outbuf[3], *inp, *outp;
60
61 *c = *isofn++;
62 if (clen) *clen = 1;
63 if (joliet_level == 0 || isofn == isoend) {
64 /* (00) and (01) are one byte in Joliet, too */
65 return 1;
66 }
67
68 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
69 i = j = len = 2;
70 inbuf[0]=(char)*(isofn - 1);
71 inbuf[1]=(char)*isofn;
72 inbuf[2]='\0';
73 inp = inbuf;
74 outp = outbuf;
75 cd9660_iconv->convchr(handle, __DECONST(const char **, &inp),
76 &i, &outp, &j);
77 len -= j;
78 if (clen) *clen = len;
79 *c = '\0';
80 while(len--)
81 *c |= (*(outp - len - 1) & 0xff) << (len << 3);
82 } else {
83 switch (*c) {
84 default:
85 *c = '?';
86 break;
87 case '\0':
88 *c = *isofn;
89 break;
90 }
91 }
92
93 return 2;
94 }
95
96 /*
97 * translate and compare a filename
98 * returns (fn - isofn)
99 * Note: Version number plus ';' may be omitted.
100 */
101 int
isofncmp(u_char * fn,int fnlen,u_char * isofn,int isolen,int joliet_level,int flags,void * handle,void * lhandle)102 isofncmp(u_char *fn, int fnlen, u_char *isofn, int isolen, int joliet_level,
103 int flags, void *handle, void *lhandle)
104 {
105 int i, j;
106 u_short c, d;
107 u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
108
109 for (; fn < fnend; ) {
110 d = sgetrune(fn, fnend - fn, __DECONST(const char **, &fn),
111 flags, lhandle);
112 if (isofn == isoend)
113 return d;
114 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
115 if (c == ';') {
116 if (d != ';')
117 return d;
118 for (i = 0; fn < fnend; i = i * 10 + *fn++ - '0') {
119 if (*fn < '0' || *fn > '9') {
120 return -1;
121 }
122 }
123 for (j = 0; isofn != isoend; j = j * 10 + c - '0')
124 isofn += isochar(isofn, isoend,
125 joliet_level, &c,
126 NULL, flags, handle);
127 return i - j;
128 }
129 if (c != d) {
130 if (c >= 'A' && c <= 'Z') {
131 if (c + ('a' - 'A') != d) {
132 if (d >= 'a' && d <= 'z')
133 return d - ('a' - 'A') - c;
134 else
135 return d - c;
136 }
137 } else
138 return d - c;
139 }
140 }
141 if (isofn != isoend) {
142 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
143 switch (c) {
144 default:
145 return -c;
146 case '.':
147 if (isofn != isoend) {
148 isochar(isofn, isoend, joliet_level, &c,
149 NULL, flags, handle);
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
isofntrans(u_char * infn,int infnlen,u_char * outfn,u_short * outfnlen,int original,int assoc,int joliet_level,int flags,void * handle)165 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen, int original,
166 int assoc, int joliet_level, int flags, void *handle)
167 {
168 u_short c, d = '\0';
169 u_char *outp = outfn, *infnend = infn + infnlen;
170 int clen;
171
172 if (assoc) {
173 *outp++ = ASSOCCHAR;
174 }
175 for (; infn != infnend; ) {
176 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle);
177
178 if (!original && !joliet_level && c >= 'A' && c <= 'Z')
179 c += ('a' - 'A');
180 else if (!original && c == ';') {
181 outp -= (d == '.');
182 break;
183 }
184 d = c;
185 while(clen--)
186 *outp++ = c >> (clen << 3);
187 }
188 *outfnlen = outp - outfn;
189 }
190
191 /*
192 * same as sgetrune(3)
193 */
194 u_short
sgetrune(const char * string,size_t n,char const ** result,int flags,void * handle)195 sgetrune(const char *string, size_t n, char const **result,
196 int flags, void *handle)
197 {
198 size_t i, j, len;
199 char outbuf[3], *outp;
200 u_short c = '\0';
201
202 len = i = (n < 2) ? n : 2;
203 j = 2;
204 outp = outbuf;
205
206 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
207 cd9660_iconv->convchr(handle, &string, &i, &outp, &j);
208 len -= i;
209 } else {
210 len = 1;
211 string++;
212 }
213
214 if (result) *result = string;
215 while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3);
216 return (c);
217 }
218