1 /*
2 * SPDX-License-Identifier: ISC
3 *
4 * Copyright (c) 2012-2016 Todd C. Miller <Todd.Miller@sudo.ws>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 /*
20 * This is an open source non-commercial project. Dear PVS-Studio, please check it.
21 * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
22 */
23
24 #include <config.h>
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #ifdef HAVE_STDBOOL_H
30 # include <stdbool.h>
31 #else
32 # include "compat/stdbool.h"
33 #endif /* HAVE_STDBOOL_H */
34
35 #define DEFAULT_TEXT_DOMAIN "sudoers"
36
37 #include "sudo_compat.h"
38 #include "sudo_eventlog.h"
39 #include "sudo_fatal.h"
40 #include "sudo_gettext.h"
41 #include "sudoers_debug.h"
42
43 #include "defaults.h"
44 #include "logging.h"
45
46 static int current_locale = SUDOERS_LOCALE_USER;
47 static char *user_locale;
48 static char *sudoers_locale;
49
50 int
sudoers_getlocale(void)51 sudoers_getlocale(void)
52 {
53 debug_decl(sudoers_getlocale, SUDOERS_DEBUG_UTIL);
54 debug_return_int(current_locale);
55 }
56
57 bool
sudoers_initlocale(const char * ulocale,const char * slocale)58 sudoers_initlocale(const char *ulocale, const char *slocale)
59 {
60 debug_decl(sudoers_initlocale, SUDOERS_DEBUG_UTIL);
61
62 if (ulocale != NULL) {
63 free(user_locale);
64 if ((user_locale = strdup(ulocale)) == NULL)
65 debug_return_bool(false);
66 }
67 if (slocale != NULL) {
68 free(sudoers_locale);
69 if ((sudoers_locale = strdup(slocale)) == NULL)
70 debug_return_bool(false);
71 }
72 sudo_debug_printf(SUDO_DEBUG_INFO, "%s: user locale %s, sudoers locale %s",
73 __func__, user_locale, sudoers_locale);
74 debug_return_bool(true);
75 }
76
77 /*
78 * Set locale to user or sudoers value.
79 * Returns true on success and false on failure,
80 * If prev_locale is non-NULL it will be filled in with the
81 * old SUDOERS_LOCALE_* value.
82 */
83 bool
sudoers_setlocale(int locale_type,int * prev_locale)84 sudoers_setlocale(int locale_type, int *prev_locale)
85 {
86 char *res = NULL;
87 debug_decl(sudoers_setlocale, SUDOERS_DEBUG_UTIL);
88
89 switch (locale_type) {
90 case SUDOERS_LOCALE_USER:
91 if (prev_locale)
92 *prev_locale = current_locale;
93 if (current_locale != SUDOERS_LOCALE_USER) {
94 current_locale = SUDOERS_LOCALE_USER;
95 sudo_debug_printf(SUDO_DEBUG_DEBUG,
96 "%s: setting locale to %s (user)", __func__,
97 user_locale ? user_locale : "");
98 res = setlocale(LC_ALL, user_locale ? user_locale : "");
99 if (res != NULL && user_locale == NULL) {
100 user_locale = setlocale(LC_ALL, NULL);
101 if (user_locale != NULL)
102 user_locale = strdup(user_locale);
103 if (user_locale == NULL)
104 res = NULL;
105 }
106 }
107 break;
108 case SUDOERS_LOCALE_SUDOERS:
109 if (prev_locale)
110 *prev_locale = current_locale;
111 if (current_locale != SUDOERS_LOCALE_SUDOERS) {
112 current_locale = SUDOERS_LOCALE_SUDOERS;
113 sudo_debug_printf(SUDO_DEBUG_DEBUG,
114 "%s: setting locale to %s (sudoers)", __func__,
115 sudoers_locale ? sudoers_locale : "C");
116 res = setlocale(LC_ALL, sudoers_locale ? sudoers_locale : "C");
117 if (res == NULL && sudoers_locale != NULL) {
118 if (strcmp(sudoers_locale, "C") != 0) {
119 free(sudoers_locale);
120 sudoers_locale = strdup("C");
121 if (sudoers_locale != NULL)
122 res = setlocale(LC_ALL, "C");
123 }
124 }
125 }
126 break;
127 }
128 debug_return_bool(res ? true : false);
129 }
130
131 bool
sudoers_warn_setlocale(bool restore,int * cookie)132 sudoers_warn_setlocale(bool restore, int *cookie)
133 {
134 debug_decl(sudoers_warn_setlocale, SUDOERS_DEBUG_UTIL);
135
136 if (restore)
137 debug_return_bool(sudoers_setlocale(*cookie, NULL));
138 debug_return_bool(sudoers_setlocale(SUDOERS_LOCALE_USER, cookie));
139 }
140
141 /*
142 * Callback for sudoers_locale sudoers setting.
143 */
144 bool
sudoers_locale_callback(const union sudo_defs_val * sd_un)145 sudoers_locale_callback(const union sudo_defs_val *sd_un)
146 {
147 debug_decl(sudoers_locale_callback, SUDOERS_DEBUG_UTIL);
148
149 if (sudoers_initlocale(NULL, sd_un->str)) {
150 if (setlocale(LC_ALL, sd_un->str) != NULL)
151 debug_return_bool(true);
152 }
153 debug_return_bool(false);
154 }
155