1/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper, <drepper@gnu.org>.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <locale.h>
21#include <nl_types.h>
22#include <stdlib.h>
23#include <string.h>
24#include <unistd.h>
25#include <sys/mman.h>
26
27#include "catgetsinfo.h"
28
29
30/* Open the catalog and return a descriptor for the catalog. */
31nl_catd
32catopen (const char *cat_name, int flag)
33{
34 __nl_catd result;
35 const char *env_var = NULL;
36 const char *nlspath = NULL;
37 char *tmp = NULL;
38
39 if (strchr (cat_name, '/') == NULL)
40 {
41 if (flag == NL_CAT_LOCALE)
42 /* Use the current locale setting for LC_MESSAGES. */
43 env_var = setlocale (LC_MESSAGES, NULL);
44 else
45 /* Use the LANG environment variable. */
46 env_var = getenv ("LANG");
47
48 if (env_var == NULL || *env_var == '\0'
49 || (__libc_enable_secure && strchr (env_var, '/') != NULL))
50 env_var = "C";
51
52 nlspath = getenv ("NLSPATH");
53 if (nlspath != NULL && *nlspath != '\0')
54 {
55 /* Append the system dependent directory. */
56 size_t len = strlen (nlspath) + 1 + sizeof NLSPATH;
57 tmp = malloc (len);
58
59 if (__glibc_unlikely (tmp == NULL))
60 return (nl_catd) -1;
61
62 __stpcpy (__stpcpy (__stpcpy (tmp, nlspath), ":"), NLSPATH);
63 nlspath = tmp;
64 }
65 else
66 nlspath = NLSPATH;
67 }
68
69 result = (__nl_catd) malloc (sizeof (*result));
70 if (result == NULL)
71 {
72 /* We cannot get enough memory. */
73 result = (nl_catd) -1;
74 }
75 else if (__open_catalog (cat_name, nlspath, env_var, result) != 0)
76 {
77 /* Couldn't open the file. */
78 free ((void *) result);
79 result = (nl_catd) -1;
80 }
81
82 free (tmp);
83 return (nl_catd) result;
84}
85
86
87/* Return message from message catalog. */
88char *
89catgets (nl_catd catalog_desc, int set, int message, const char *string)
90{
91 __nl_catd catalog;
92 size_t idx;
93 size_t cnt;
94
95 /* Be generous if catalog which failed to be open is used. */
96 if (catalog_desc == (nl_catd) -1 || ++set <= 0 || message < 0)
97 return (char *) string;
98
99 catalog = (__nl_catd) catalog_desc;
100
101 idx = ((set * message) % catalog->plane_size) * 3;
102 cnt = 0;
103 do
104 {
105 if (catalog->name_ptr[idx + 0] == (uint32_t) set
106 && catalog->name_ptr[idx + 1] == (uint32_t) message)
107 return (char *) &catalog->strings[catalog->name_ptr[idx + 2]];
108
109 idx += catalog->plane_size * 3;
110 }
111 while (++cnt < catalog->plane_depth);
112
113 __set_errno (ENOMSG);
114 return (char *) string;
115}
116
117
118/* Return resources used for loaded message catalog. */
119int
120catclose (nl_catd catalog_desc)
121{
122 __nl_catd catalog;
123
124 /* Be generous if catalog which failed to be open is used. */
125 if (catalog_desc == (nl_catd) -1)
126 {
127 __set_errno (EBADF);
128 return -1;
129 }
130
131 catalog = (__nl_catd) catalog_desc;
132
133#ifdef _POSIX_MAPPED_FILES
134 if (catalog->status == mmapped)
135 __munmap ((void *) catalog->file_ptr, catalog->file_size);
136 else
137#endif /* _POSIX_MAPPED_FILES */
138 if (catalog->status == malloced)
139 free ((void *) catalog->file_ptr);
140 else
141 {
142 __set_errno (EBADF);
143 return -1;
144 }
145
146 free ((void *) catalog);
147
148 return 0;
149}
150