1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000, 2001 Alexey Zelkin <[email protected]>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include "namespace.h"
33 #include <sys/types.h>
34 #include <sys/stat.h>
35
36 #include <errno.h>
37 #include <fcntl.h>
38 #include <limits.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42 #include "un-namespace.h"
43
44 #include "ldpart.h"
45 #include "setlocale.h"
46
47 static int split_lines(char *, const char *);
48
49 int
__part_load_locale(const char * name,int * using_locale,char ** locale_buf,const char * category_filename,int locale_buf_size_max,int locale_buf_size_min,const char ** dst_localebuf)50 __part_load_locale(const char *name,
51 int *using_locale,
52 char **locale_buf,
53 const char *category_filename,
54 int locale_buf_size_max,
55 int locale_buf_size_min,
56 const char **dst_localebuf)
57 {
58 int saverr, fd, i, num_lines;
59 char *lbuf, *p;
60 const char *plim;
61 char filename[PATH_MAX];
62 struct stat st;
63 size_t namesize, bufsize;
64
65 /* 'name' must be already checked. */
66 if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0 ||
67 strncmp(name, "C.", 2) == 0) {
68 *using_locale = 0;
69 return (_LDP_CACHE);
70 }
71
72 /*
73 * If the locale name is the same as our cache, use the cache.
74 */
75 if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) {
76 *using_locale = 1;
77 return (_LDP_CACHE);
78 }
79
80 /*
81 * Slurp the locale file into the cache.
82 */
83 namesize = strlen(name) + 1;
84
85 /* 'PathLocale' must be already set & checked. */
86
87 /* Range checking not needed, 'name' size is limited */
88 strcpy(filename, _PathLocale);
89 strcat(filename, "/");
90 strcat(filename, name);
91 strcat(filename, "/");
92 strcat(filename, category_filename);
93 if ((fd = _open(filename, O_RDONLY | O_CLOEXEC)) < 0)
94 return (_LDP_ERROR);
95 if (_fstat(fd, &st) != 0)
96 goto bad_locale;
97 if (st.st_size <= 0) {
98 errno = EFTYPE;
99 goto bad_locale;
100 }
101 bufsize = namesize + st.st_size;
102 if ((lbuf = malloc(bufsize)) == NULL) {
103 errno = ENOMEM;
104 goto bad_locale;
105 }
106 (void)strcpy(lbuf, name);
107 p = lbuf + namesize;
108 plim = p + st.st_size;
109 if (_read(fd, p, (size_t) st.st_size) != st.st_size)
110 goto bad_lbuf;
111 /*
112 * Parse the locale file into localebuf.
113 */
114 if (plim[-1] != '\n') {
115 errno = EFTYPE;
116 goto bad_lbuf;
117 }
118 num_lines = split_lines(p, plim);
119 if (num_lines >= locale_buf_size_max)
120 num_lines = locale_buf_size_max;
121 else if (num_lines >= locale_buf_size_min)
122 num_lines = locale_buf_size_min;
123 else {
124 errno = EFTYPE;
125 goto bad_lbuf;
126 }
127 (void)_close(fd);
128 /*
129 * Record the successful parse in the cache.
130 */
131 if (*locale_buf != NULL)
132 free(*locale_buf);
133 *locale_buf = lbuf;
134 for (p = *locale_buf, i = 0; i < num_lines; i++)
135 dst_localebuf[i] = (p += strlen(p) + 1);
136 for (i = num_lines; i < locale_buf_size_max; i++)
137 dst_localebuf[i] = NULL;
138 *using_locale = 1;
139
140 return (_LDP_LOADED);
141
142 bad_lbuf:
143 saverr = errno;
144 free(lbuf);
145 errno = saverr;
146 bad_locale:
147 saverr = errno;
148 (void)_close(fd);
149 errno = saverr;
150
151 return (_LDP_ERROR);
152 }
153
154 static int
split_lines(char * p,const char * plim)155 split_lines(char *p, const char *plim)
156 {
157 int i;
158
159 i = 0;
160 while (p < plim) {
161 if (*p == '\n') {
162 *p = '\0';
163 i++;
164 }
165 p++;
166 }
167 return (i);
168 }
169
170