1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
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 "namespace.h"
30 #include <sys/types.h>
31 #include <sys/stat.h>
32
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <limits.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include "un-namespace.h"
40
41 #include "ldpart.h"
42 #include "setlocale.h"
43
44 static int split_lines(char *, const char *);
45
46 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)47 __part_load_locale(const char *name,
48 int *using_locale,
49 char **locale_buf,
50 const char *category_filename,
51 int locale_buf_size_max,
52 int locale_buf_size_min,
53 const char **dst_localebuf)
54 {
55 int saverr, fd, i, num_lines;
56 char *lbuf, *p;
57 const char *plim;
58 char filename[PATH_MAX];
59 struct stat st;
60 size_t namesize, bufsize;
61
62 /* 'name' must be already checked. */
63 if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0 ||
64 strncmp(name, "C.", 2) == 0) {
65 *using_locale = 0;
66 return (_LDP_CACHE);
67 }
68
69 /*
70 * If the locale name is the same as our cache, use the cache.
71 */
72 if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) {
73 *using_locale = 1;
74 return (_LDP_CACHE);
75 }
76
77 /*
78 * Slurp the locale file into the cache.
79 */
80 namesize = strlen(name) + 1;
81
82 /* 'PathLocale' must be already set & checked. */
83
84 /* Range checking not needed, 'name' size is limited */
85 strcpy(filename, _PathLocale);
86 strcat(filename, "/");
87 strcat(filename, name);
88 strcat(filename, "/");
89 strcat(filename, category_filename);
90 if ((fd = _open(filename, O_RDONLY | O_CLOEXEC)) < 0)
91 return (_LDP_ERROR);
92 if (_fstat(fd, &st) != 0)
93 goto bad_locale;
94 if (st.st_size <= 0) {
95 errno = EFTYPE;
96 goto bad_locale;
97 }
98 bufsize = namesize + st.st_size;
99 if ((lbuf = malloc(bufsize)) == NULL) {
100 errno = ENOMEM;
101 goto bad_locale;
102 }
103 (void)strcpy(lbuf, name);
104 p = lbuf + namesize;
105 plim = p + st.st_size;
106 if (_read(fd, p, (size_t) st.st_size) != st.st_size)
107 goto bad_lbuf;
108 /*
109 * Parse the locale file into localebuf.
110 */
111 if (plim[-1] != '\n') {
112 errno = EFTYPE;
113 goto bad_lbuf;
114 }
115 num_lines = split_lines(p, plim);
116 if (num_lines >= locale_buf_size_max)
117 num_lines = locale_buf_size_max;
118 else if (num_lines >= locale_buf_size_min)
119 num_lines = locale_buf_size_min;
120 else {
121 errno = EFTYPE;
122 goto bad_lbuf;
123 }
124 (void)_close(fd);
125 /*
126 * Record the successful parse in the cache.
127 */
128 if (*locale_buf != NULL)
129 free(*locale_buf);
130 *locale_buf = lbuf;
131 for (p = *locale_buf, i = 0; i < num_lines; i++)
132 dst_localebuf[i] = (p += strlen(p) + 1);
133 for (i = num_lines; i < locale_buf_size_max; i++)
134 dst_localebuf[i] = NULL;
135 *using_locale = 1;
136
137 return (_LDP_LOADED);
138
139 bad_lbuf:
140 saverr = errno;
141 free(lbuf);
142 errno = saverr;
143 bad_locale:
144 saverr = errno;
145 (void)_close(fd);
146 errno = saverr;
147
148 return (_LDP_ERROR);
149 }
150
151 static int
split_lines(char * p,const char * plim)152 split_lines(char *p, const char *plim)
153 {
154 int i;
155
156 i = 0;
157 while (p < plim) {
158 if (*p == '\n') {
159 *p = '\0';
160 i++;
161 }
162 p++;
163 }
164 return (i);
165 }
166
167