1 /*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef __CUTILS_PROPERTIES_H
18 #define __CUTILS_PROPERTIES_H
19
20 #include <sys/types.h>
21 #include <stddef.h>
22
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26
27 /* System properties are *small* name value pairs managed by the
28 ** property service. If your data doesn't fit in the provided
29 ** space it is not appropriate for a system property.
30 **
31 ** WARNING: system/bionic/include/sys/system_properties.h also defines
32 ** these, but with different names. (TODO: fix that)
33 */
34 #define PROPERTY_KEY_MAX PROP_NAME_MAX
35 #define PROPERTY_VALUE_MAX PROP_VALUE_MAX
36
37 /* property_get: returns the length of the value which will never be
38 ** greater than PROPERTY_VALUE_MAX - 1 and will always be zero terminated.
39 ** (the length does not include the terminating zero).
40 **
41 ** If the property read fails or returns an empty value, the default
42 ** value is used (if nonnull).
43 */
44 int property_get(const char *key, char *value, const char *default_value);
45
46 /* property_set: returns 0 on success, < 0 on failure
47 */
48 int property_set(const char *key, const char *value);
49
50 int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie);
51
52 #if defined(__BIONIC_FORTIFY)
53
54 extern int __property_get_real(const char *, char *, const char *)
55 __asm__(__USER_LABEL_PREFIX__ "property_get");
56 __errordecl(__property_get_too_small_error, "property_get() called with too small of a buffer");
57
58 __BIONIC_FORTIFY_INLINE
59 int property_get(const char *key, char *value, const char *default_value) {
60 size_t bos = __bos(value);
61 if (bos < PROPERTY_VALUE_MAX) {
62 __property_get_too_small_error();
63 }
64 return __property_get_real(key, value, default_value);
65 }
66
67 #endif
68
69 #ifdef HAVE_SYSTEM_PROPERTY_SERVER
70 /*
71 * We have an external property server instead of built-in libc support.
72 * Used by the simulator.
73 */
pc_init1(MachineState * machine,const char * host_type,const char * pci_type)74 #define SYSTEM_PROPERTY_PIPE_NAME "/tmp/android-sysprop"
75
76 enum {
77 kSystemPropertyUnknown = 0,
78 kSystemPropertyGet,
79 kSystemPropertySet,
80 kSystemPropertyList
81 };
82 #endif /*HAVE_SYSTEM_PROPERTY_SERVER*/
83
84
85 #ifdef __cplusplus
86 }
87 #endif
88
89 #endif
90