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 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 /* System properties are *small* name value pairs managed by the 25 ** property service. If your data doesn't fit in the provided 26 ** space it is not appropriate for a system property. 27 ** 28 ** WARNING: system/bionic/include/sys/system_properties.h also defines 29 ** these, but with different names. (TODO: fix that) 30 */ 31 #define PROPERTY_KEY_MAX 32 32 #define PROPERTY_VALUE_MAX 92 33 34 /* property_get: returns the length of the value which will never be 35 ** greater than PROPERTY_VALUE_MAX - 1 and will always be zero terminated. 36 ** (the length does not include the terminating zero). 37 ** 38 ** If the property read fails or returns an empty value, the default 39 ** value is used (if nonnull). 40 */ 41 int property_get(const char *key, char *value, const char *default_value); 42 43 /* property_set: returns 0 on success, < 0 on failure 44 */ 45 int property_set(const char *key, const char *value); 46 47 int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie); 48 49 50 #ifdef HAVE_SYSTEM_PROPERTY_SERVER 51 /* 52 * We have an external property server instead of built-in libc support. 53 * Used by the simulator. 54 */ 55 #define SYSTEM_PROPERTY_PIPE_NAME "/tmp/android-sysprop" 56 57 enum { 58 kSystemPropertyUnknown = 0, 59 kSystemPropertyGet, 60 kSystemPropertySet, 61 kSystemPropertyList 62 }; 63 #endif /*HAVE_SYSTEM_PROPERTY_SERVER*/ 64 65 66 #ifdef __cplusplus 67 } 68 #endif 69 70 #endif 71