1 /*
2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include "lint.h"
29 #include "file64.h"
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <errno.h>
33 #include <fcntl.h>
34 #include <limits.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38 #include <stdio.h>
39
40 #include "ldpart.h"
41 #include "setlocale.h"
42
43 static int split_lines(char *, const char *);
44
45 int
46 __part_load_locale(const char *name, int *using_locale,
47 char **locale_buf, const char *category_filename,
48 int locale_buf_size_max, int locale_buf_size_min,
49 const char **dst_localebuf)
50 {
51 int saverr, fd, i, num_lines;
52 char *lbuf, *p;
53 const char *plim;
54 char filename[PATH_MAX];
55 struct stat st;
56 size_t namesize, bufsize;
57
58 /* 'name' must be already checked. */
59 if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0) {
60 *using_locale = 0;
61 return (_LDP_CACHE);
62 }
63
64 /*
65 * If the locale name is the same as our cache, use the cache.
66 */
67 if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) {
68 *using_locale = 1;
69 return (_LDP_CACHE);
70 }
71
72 /*
73 * Slurp the locale file into the cache.
74 */
75 namesize = strlen(name) + 1;
76
77 /* 'PathLocale' must be already set & checked. */
78
79 (void) snprintf(filename, sizeof (filename), "%s/%s/%s/LCL_DATA",
80 _PathLocale, name, category_filename);
81
82 if ((fd = open(filename, O_RDONLY)) < 0)
83 return (_LDP_ERROR);
84 if (fstat(fd, &st) != 0)
85 goto bad_locale;
86 if (st.st_size <= 0) {
87 errno = EINVAL;
88 goto bad_locale;
89 }
90 bufsize = namesize + st.st_size;
91 if ((lbuf = malloc(bufsize)) == NULL) {
92 errno = ENOMEM;
93 goto bad_locale;
94 }
95 (void) strcpy(lbuf, name);
96 p = lbuf + namesize;
97 plim = p + st.st_size;
98 if (read(fd, p, (size_t)st.st_size) != st.st_size)
99 goto bad_lbuf;
100 /*
101 * Parse the locale file into localebuf.
102 */
103 if (plim[-1] != '\n') {
104 errno = EINVAL;
105 goto bad_lbuf;
106 }
107 num_lines = split_lines(p, plim);
108 if (num_lines >= locale_buf_size_max)
109 num_lines = locale_buf_size_max;
110 else if (num_lines >= locale_buf_size_min)
111 num_lines = locale_buf_size_min;
112 else {
113 errno = EINVAL;
114 goto bad_lbuf;
115 }
116 (void) close(fd);
117 /*
118 * Record the successful parse in the cache.
119 */
120 if (*locale_buf != NULL)
121 free(*locale_buf);
122 *locale_buf = lbuf;
123 for (p = *locale_buf, i = 0; i < num_lines; i++)
124 dst_localebuf[i] = (p += strlen(p) + 1);
125 for (i = num_lines; i < locale_buf_size_max; i++)
126 dst_localebuf[i] = NULL;
127 *using_locale = 1;
128
129 return (_LDP_LOADED);
130
131 bad_lbuf:
132 saverr = errno;
133 free(lbuf);
134 errno = saverr;
135 bad_locale:
136 saverr = errno;
137 (void) close(fd);
138 errno = saverr;
139
140 return (_LDP_ERROR);
141 }
142
143 static int
144 split_lines(char *p, const char *plim)
145 {
146 int i;
147
148 i = 0;
149 while (p < plim) {
150 if (*p == '\n') {
151 *p = '\0';
152 i++;
153 }
154 p++;
155 }
156 return (i);
157 }