1 | /* $NetBSD: cd9660_util.c,v 1.14 2016/03/09 20:18:17 christos Exp $ */ |
2 | |
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). |
11 | * |
12 | * Redistribution and use in source and binary forms, with or without |
13 | * modification, are permitted provided that the following conditions |
14 | * are met: |
15 | * 1. Redistributions of source code must retain the above copyright |
16 | * notice, this list of conditions and the following disclaimer. |
17 | * 2. Redistributions in binary form must reproduce the above copyright |
18 | * notice, this list of conditions and the following disclaimer in the |
19 | * documentation and/or other materials provided with the distribution. |
20 | * 3. Neither the name of the University nor the names of its contributors |
21 | * may be used to endorse or promote products derived from this software |
22 | * without specific prior written permission. |
23 | * |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
34 | * SUCH DAMAGE. |
35 | * |
36 | * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94 |
37 | */ |
38 | |
39 | #include <sys/cdefs.h> |
40 | #ifdef _KERNEL |
41 | __KERNEL_RCSID(0, "$NetBSD: cd9660_util.c,v 1.14 2016/03/09 20:18:17 christos Exp $" ); |
42 | #else |
43 | /* used by macppc_installboot */ |
44 | #if HAVE_NBTOOL_CONFIG_H |
45 | #include "nbtool_config.h" |
46 | #endif |
47 | #endif |
48 | |
49 | #include <sys/param.h> |
50 | #ifdef _KERNEL |
51 | #include <sys/systm.h> |
52 | #include <sys/namei.h> |
53 | #include <sys/resourcevar.h> |
54 | #include <sys/kernel.h> |
55 | #include <sys/file.h> |
56 | #include <sys/stat.h> |
57 | #include <sys/buf.h> |
58 | #include <sys/proc.h> |
59 | #include <sys/mount.h> |
60 | #include <sys/vnode.h> |
61 | #include <sys/dirent.h> |
62 | #else |
63 | #include <assert.h> |
64 | #include <dirent.h> |
65 | #define KASSERT(x) assert(x) /* XXX for <fs/unicode.h> */ |
66 | #endif |
67 | |
68 | #include <fs/cd9660/iso.h> |
69 | #ifdef _KERNEL |
70 | #include <fs/cd9660/cd9660_extern.h> |
71 | #else |
72 | static int isochar(const u_char *, const u_char *, int, uint16_t *); |
73 | #endif |
74 | |
75 | #include <fs/unicode.h> |
76 | |
77 | static uint16_t wget(const u_char **, size_t *, int); |
78 | static int wput(u_char *, size_t, uint16_t, int); |
79 | |
80 | int cd9660_utf8_joliet = 1; |
81 | |
82 | /* |
83 | * Get one character out of an iso filename |
84 | * Return number of bytes consumed |
85 | */ |
86 | int |
87 | isochar(const u_char *isofn, const u_char *isoend, int joliet_level, |
88 | uint16_t *c) |
89 | { |
90 | |
91 | *c = isofn[0]; |
92 | if (joliet_level == 0 || isofn + 1 == isoend) { |
93 | /* (00) and (01) are one byte in Joliet, too */ |
94 | return 1; |
95 | } |
96 | |
97 | if (cd9660_utf8_joliet) { |
98 | *c = (*c << 8) + isofn[1]; |
99 | } else { |
100 | /* characters outside ISO-8859-1 subset replaced with '?' */ |
101 | if (*c != 0) |
102 | *c = '?'; |
103 | else |
104 | *c = isofn[1]; |
105 | } |
106 | |
107 | return 2; |
108 | } |
109 | |
110 | /* |
111 | * translate and compare a filename |
112 | * Note: Version number plus ';' may be omitted. |
113 | */ |
114 | int |
115 | isofncmp(const u_char *fn, size_t fnlen, const u_char *isofn, size_t isolen, |
116 | int joliet_level) |
117 | { |
118 | int i, j; |
119 | uint16_t fc, ic; |
120 | const u_char *isoend = isofn + isolen; |
121 | |
122 | #ifdef ISOFNCMPDEBUG |
123 | printf("fn = %s, fnlen = %zu, isofn = %s, isolen = %zu\n" , |
124 | fn, fnlen, isofn, isolen); |
125 | #endif |
126 | |
127 | while (fnlen > 0) { |
128 | fc = wget(&fn, &fnlen, joliet_level); |
129 | |
130 | if (isofn == isoend) |
131 | return fc; |
132 | isofn += isochar(isofn, isoend, joliet_level, &ic); |
133 | if (ic == ';') { |
134 | switch (fc) { |
135 | default: |
136 | return fc; |
137 | case 0: |
138 | return 0; |
139 | case ';': |
140 | break; |
141 | } |
142 | for (i = 0; fnlen-- != 0; i = i * 10 + *fn++ - '0') { |
143 | if (*fn < '0' || *fn > '9') { |
144 | return -1; |
145 | } |
146 | } |
147 | for (j = 0; isofn != isoend; j = j * 10 + ic - '0') |
148 | isofn += isochar(isofn, isoend, |
149 | joliet_level, &ic); |
150 | return i - j; |
151 | } |
152 | if (ic != fc) { |
153 | if (ic >= 'A' && ic <= 'Z') { |
154 | if (ic + ('a' - 'A') != fc) { |
155 | if (fc >= 'a' && fc <= 'z') |
156 | fc -= 'a' - 'A'; |
157 | |
158 | return (int)fc - (int)ic; |
159 | } |
160 | } else |
161 | return (int)fc - (int)ic; |
162 | } |
163 | } |
164 | if (isofn != isoend) { |
165 | isofn += isochar(isofn, isoend, joliet_level, &ic); |
166 | switch (ic) { |
167 | default: |
168 | return -1; |
169 | case '.': |
170 | if (isofn != isoend) { |
171 | isochar(isofn, isoend, joliet_level, &ic); |
172 | if (ic == ';') |
173 | return 0; |
174 | } |
175 | return -1; |
176 | case ';': |
177 | return 0; |
178 | } |
179 | } |
180 | return 0; |
181 | } |
182 | |
183 | /* |
184 | * translate a filename |
185 | */ |
186 | void |
187 | isofntrans(const u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen, |
188 | int original, int casetrans, int assoc, int joliet_level) |
189 | { |
190 | int fnidx = 0; |
191 | const u_char *infnend = infn + infnlen; |
192 | uint16_t c; |
193 | int sz; |
194 | |
195 | if (assoc) { |
196 | *outfn++ = ASSOCCHAR; |
197 | fnidx++; |
198 | } |
199 | |
200 | for(; infn != infnend; fnidx += sz) { |
201 | infn += isochar(infn, infnend, joliet_level, &c); |
202 | |
203 | if (casetrans && joliet_level == 0 && c >= 'A' && c <= 'Z') |
204 | c = c + ('a' - 'A'); |
205 | else if (!original && c == ';') { |
206 | if (fnidx > 0 && outfn[-1] == '.') |
207 | fnidx--; |
208 | break; |
209 | } |
210 | |
211 | sz = wput(outfn, ISO_MAXNAMLEN - fnidx, c, joliet_level); |
212 | if (sz == 0) { |
213 | /* not enough space to write the character */ |
214 | if (fnidx < ISO_MAXNAMLEN) { |
215 | *outfn = '?'; |
216 | fnidx++; |
217 | } |
218 | break; |
219 | } |
220 | outfn += sz; |
221 | } |
222 | *outfnlen = fnidx; |
223 | } |
224 | |
225 | static uint16_t |
226 | wget(const u_char **str, size_t *sz, int joliet_level) |
227 | { |
228 | if (joliet_level > 0 && cd9660_utf8_joliet) { |
229 | /* decode UTF-8 sequence */ |
230 | return wget_utf8((const char **) str, sz); |
231 | } else { |
232 | /* |
233 | * Raw 8-bit characters without any conversion. For Joliet, |
234 | * this effectively assumes provided file name is using |
235 | * ISO-8859-1 subset. |
236 | */ |
237 | uint16_t c = *str[0]; |
238 | (*str)++; |
239 | (*sz)--; |
240 | |
241 | return c; |
242 | } |
243 | } |
244 | |
245 | static int |
246 | wput(u_char *s, size_t n, uint16_t c, int joliet_level) |
247 | { |
248 | if (joliet_level > 0 && cd9660_utf8_joliet) { |
249 | /* Store Joliet file name encoded into UTF-8 */ |
250 | return wput_utf8((char *)s, n, c); |
251 | } else { |
252 | /* |
253 | * Store raw 8-bit characters without any conversion. |
254 | * For Joliet case, this filters the Unicode characters |
255 | * to ISO-8859-1 subset. |
256 | */ |
257 | *s = (u_char)c; |
258 | return 1; |
259 | } |
260 | } |
261 | |