1 /*
2 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Paul Borman at Krystal Technologies.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "lint.h"
36 #include "file64.h"
37 #include <errno.h>
38 #include <stdio.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <sys/types.h>
42 #include <sys/stat.h>
43 #include <sys/mman.h>
44 #include <fcntl.h>
45 #include <unistd.h>
46
47 #include "libc.h"
48 #include "runetype.h"
49 #include "runefile.h"
50
51 _RuneLocale *
52 _Read_RuneMagi(const char *fname)
53 {
54 char *fdata, *data;
55 void *lastp;
56 _FileRuneLocale *frl;
57 _RuneLocale *rl;
58 _FileRuneEntry *frr;
59 _RuneEntry *rr;
60 struct stat sb;
61 int x, saverr;
62 void *variable;
63 _FileRuneEntry *runetype_ext_ranges;
64 _FileRuneEntry *maplower_ext_ranges;
65 _FileRuneEntry *mapupper_ext_ranges;
66 int runetype_ext_len = 0;
67 int fd;
68
69 if ((fd = open(fname, O_RDONLY)) < 0) {
70 errno = EINVAL;
71 return (NULL);
72 }
73
74 if (fstat(fd, &sb) < 0) {
75 (void) close(fd);
76 errno = EINVAL;
77 return (NULL);
78 }
79
80 if ((size_t)sb.st_size < sizeof (_FileRuneLocale)) {
81 (void) close(fd);
82 errno = EINVAL;
83 return (NULL);
84 }
85
86
87 fdata = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
88 (void) close(fd);
89 if (fdata == NULL) {
90 errno = EINVAL;
91 return (NULL);
92 }
93
94 frl = (_FileRuneLocale *)(void *)fdata;
95 lastp = fdata + sb.st_size;
96
97 variable = frl + 1;
98
99 if (memcmp(frl->magic, _FILE_RUNE_MAGIC_1, sizeof (frl->magic))) {
100 goto invalid;
101 }
102
103 runetype_ext_ranges = (_FileRuneEntry *)variable;
104 variable = runetype_ext_ranges + frl->runetype_ext_nranges;
105 if (variable > lastp) {
106 goto invalid;
107 }
108
109 maplower_ext_ranges = (_FileRuneEntry *)variable;
110 variable = maplower_ext_ranges + frl->maplower_ext_nranges;
111 if (variable > lastp) {
112 goto invalid;
113 }
114
115 mapupper_ext_ranges = (_FileRuneEntry *)variable;
116 variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
117 if (variable > lastp) {
118 goto invalid;
119 }
120
121 frr = runetype_ext_ranges;
122 for (x = 0; x < frl->runetype_ext_nranges; ++x) {
123 uint32_t *types;
124
125 if (frr[x].map == 0) {
126 int len = frr[x].max - frr[x].min + 1;
127 types = variable;
128 variable = types + len;
129 runetype_ext_len += len;
130 if (variable > lastp) {
131 goto invalid;
132 }
133 }
134 }
135
136 if ((char *)variable + frl->variable_len > (char *)lastp) {
137 goto invalid;
138 }
139
140 /*
141 * Convert from disk format to host format.
142 */
143 data = libc_malloc(sizeof (_RuneLocale) +
144 (frl->runetype_ext_nranges + frl->maplower_ext_nranges +
145 frl->mapupper_ext_nranges) * sizeof (_RuneEntry) +
146 runetype_ext_len * sizeof (*rr->__types) +
147 frl->variable_len);
148 if (data == NULL) {
149 saverr = errno;
150 (void) munmap(fdata, sb.st_size);
151 errno = saverr;
152 return (NULL);
153 }
154
155 rl = (_RuneLocale *)(void *)data;
156 rl->__variable = rl + 1;
157
158 (void) memcpy(rl->__magic, _RUNE_MAGIC_1, sizeof (rl->__magic));
159 (void) memcpy(rl->__encoding, frl->encoding, sizeof (rl->__encoding));
160
161 rl->__variable_len = frl->variable_len;
162 rl->__runetype_ext.__nranges = frl->runetype_ext_nranges;
163 rl->__maplower_ext.__nranges = frl->maplower_ext_nranges;
164 rl->__mapupper_ext.__nranges = frl->mapupper_ext_nranges;
165
166 for (x = 0; x < _CACHED_RUNES; ++x) {
167 rl->__runetype[x] = frl->runetype[x];
168 rl->__maplower[x] = frl->maplower[x];
169 rl->__mapupper[x] = frl->mapupper[x];
170 }
171
172 rl->__runetype_ext.__ranges = (_RuneEntry *)rl->__variable;
173 rl->__variable = rl->__runetype_ext.__ranges +
174 rl->__runetype_ext.__nranges;
175
176 rl->__maplower_ext.__ranges = (_RuneEntry *)rl->__variable;
177 rl->__variable = rl->__maplower_ext.__ranges +
178 rl->__maplower_ext.__nranges;
179
180 rl->__mapupper_ext.__ranges = (_RuneEntry *)rl->__variable;
181 rl->__variable = rl->__mapupper_ext.__ranges +
182 rl->__mapupper_ext.__nranges;
183
184 variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
185 frr = runetype_ext_ranges;
186 rr = rl->__runetype_ext.__ranges;
187 for (x = 0; x < rl->__runetype_ext.__nranges; ++x) {
188 uint32_t *types;
189
190 rr[x].__min = frr[x].min;
191 rr[x].__max = frr[x].max;
192 rr[x].__map = frr[x].map;
193 if (rr[x].__map == 0) {
194 int len = rr[x].__max - rr[x].__min + 1;
195 types = variable;
196 variable = types + len;
197 rr[x].__types = rl->__variable;
198 rl->__variable = rr[x].__types + len;
199 while (len-- > 0)
200 rr[x].__types[len] = types[len];
201 } else
202 rr[x].__types = NULL;
203 }
204
205 frr = maplower_ext_ranges;
206 rr = rl->__maplower_ext.__ranges;
207 for (x = 0; x < rl->__maplower_ext.__nranges; ++x) {
208 rr[x].__min = frr[x].min;
209 rr[x].__max = frr[x].max;
210 rr[x].__map = frr[x].map;
211 }
212
213 frr = mapupper_ext_ranges;
214 rr = rl->__mapupper_ext.__ranges;
215 for (x = 0; x < rl->__mapupper_ext.__nranges; ++x) {
216 rr[x].__min = frr[x].min;
217 rr[x].__max = frr[x].max;
218 rr[x].__map = frr[x].map;
219 }
220
221 (void) memcpy(rl->__variable, variable, rl->__variable_len);
222 (void) munmap(fdata, sb.st_size);
223
224 /*
225 * Go out and zero pointers that should be zero.
226 */
227 if (!rl->__variable_len)
228 rl->__variable = NULL;
229
230 if (!rl->__runetype_ext.__nranges)
231 rl->__runetype_ext.__ranges = NULL;
232
233 if (!rl->__maplower_ext.__nranges)
234 rl->__maplower_ext.__ranges = NULL;
235
236 if (!rl->__mapupper_ext.__nranges)
237 rl->__mapupper_ext.__ranges = NULL;
238
239 return (rl);
240
241 invalid:
242 (void) munmap(fdata, sb.st_size);
243 errno = EINVAL;
244 return (NULL);
245 }