1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
30 #include <sys/_system_properties.h>
31
32 #include <system_properties/prop_area.h>
33 #include <system_properties/system_properties.h>
34
35 #include "private/bionic_defs.h"
36
37 static SystemProperties system_properties;
38 static_assert(__is_trivially_constructible(SystemProperties),
39 "System Properties must be trivially constructable");
40
41 // This is public because it was exposed in the NDK. As of 2017-01, ~60 apps reference this symbol.
42 // It is set to nullptr and never modified.
43 __BIONIC_WEAK_VARIABLE_FOR_NATIVE_BRIDGE
44 prop_area* __system_property_area__ = nullptr;
45
46 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_properties_init()47 int __system_properties_init() {
48 return system_properties.Init(PROP_FILENAME) ? 0 : -1;
49 }
50
51 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_set_filename(const char *)52 int __system_property_set_filename(const char*) {
53 return -1;
54 }
55
56 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_area_init()57 int __system_property_area_init() {
58 bool fsetxattr_failed = false;
59 return system_properties.AreaInit(PROP_FILENAME, &fsetxattr_failed) && !fsetxattr_failed ? 0 : -1;
60 }
61
62 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_area_serial()63 uint32_t __system_property_area_serial() {
64 return system_properties.AreaSerial();
65 }
66
67 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_find(const char * name)68 const prop_info* __system_property_find(const char* name) {
69 return system_properties.Find(name);
70 }
71
72 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_read(const prop_info * pi,char * name,char * value)73 int __system_property_read(const prop_info* pi, char* name, char* value) {
74 return system_properties.Read(pi, name, value);
75 }
76
77 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_read_callback(const prop_info * pi,void (* callback)(void * cookie,const char * name,const char * value,uint32_t serial),void * cookie)78 void __system_property_read_callback(const prop_info* pi,
79 void (*callback)(void* cookie, const char* name,
80 const char* value, uint32_t serial),
81 void* cookie) {
82 return system_properties.ReadCallback(pi, callback, cookie);
83 }
84
85 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_get(const char * name,char * value)86 int __system_property_get(const char* name, char* value) {
87 return system_properties.Get(name, value);
88 }
89
90 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_update(prop_info * pi,const char * value,unsigned int len)91 int __system_property_update(prop_info* pi, const char* value, unsigned int len) {
92 return system_properties.Update(pi, value, len);
93 }
94
95 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_add(const char * name,unsigned int namelen,const char * value,unsigned int valuelen)96 int __system_property_add(const char* name, unsigned int namelen, const char* value,
97 unsigned int valuelen) {
98 return system_properties.Add(name, namelen, value, valuelen);
99 }
100
101 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_serial(const prop_info * pi)102 uint32_t __system_property_serial(const prop_info* pi) {
103 return system_properties.Serial(pi);
104 }
105
106 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_wait_any(uint32_t old_serial)107 uint32_t __system_property_wait_any(uint32_t old_serial) {
108 return system_properties.WaitAny(old_serial);
109 }
110
111 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_wait(const prop_info * pi,uint32_t old_serial,uint32_t * new_serial_ptr,const timespec * relative_timeout)112 bool __system_property_wait(const prop_info* pi, uint32_t old_serial, uint32_t* new_serial_ptr,
113 const timespec* relative_timeout) {
114 return system_properties.Wait(pi, old_serial, new_serial_ptr, relative_timeout);
115 }
116
117 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_find_nth(unsigned n)118 const prop_info* __system_property_find_nth(unsigned n) {
119 return system_properties.FindNth(n);
120 }
121
122 __BIONIC_WEAK_FOR_NATIVE_BRIDGE
__system_property_foreach(void (* propfn)(const prop_info * pi,void * cookie),void * cookie)123 int __system_property_foreach(void (*propfn)(const prop_info* pi, void* cookie), void* cookie) {
124 return system_properties.Foreach(propfn, cookie);
125 }
126