text: /*
   * Copyright (C) 2006 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef __CUTILS_PROPERTIES_H
  #define __CUTILS_PROPERTIES_H
  
  #include <sys/cdefs.h>
  #include <stddef.h>
  #ifdef ANDROID
  #include <sys/system_properties.h>
  #else
  #ifndef PROP_NAME_MAX
  #define PROP_NAME_MAX  32
  #endif
  #ifndef PROP_VALUE_MAX
  #define PROP_VALUE_MAX  92
  #endif
  #endif
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* System properties are *small* name value pairs managed by the
  ** property service.  If your data doesn't fit in the provided
  ** space it is not appropriate for a system property.
  **
  ** WARNING: system/bionic/include/sys/system_properties.h also defines
  **          these, but with different names.  (TODO: fix that)
  */
  #define PROPERTY_KEY_MAX   PROP_NAME_MAX
  #define PROPERTY_VALUE_MAX  PROP_VALUE_MAX
  
  /* property_get: returns the length of the value which will never be
  ** greater than PROPERTY_VALUE_MAX - 1 and will always be zero terminated.
  ** (the length does not include the terminating zero).
  **
  ** If the property read fails or returns an empty value, the default
  ** value is used (if nonnull).
  */
  int property_get(const char *key, char *value, const char *default_value);
  
  /* property_set: returns 0 on success, < 0 on failure
  */
  int property_set(const char *key, const char *value);
      
  int property_list(void (*propfn)(const char *key, const char *value, void *cookie), void *cookie);    
  
  #if defined(__BIONIC_FORTIFY)
  
  extern int __property_get_real(const char *, char *, const char *)
      __asm__(__USER_LABEL_PREFIX__ "property_get");
  __errordecl(__property_get_too_small_error, "property_get() called with too small of a buffer");
  
  __BIONIC_FORTIFY_INLINE
  int property_get(const char *key, char *value, const char *default_value) {
      size_t bos = __bos(value);
      if (bos < PROPERTY_VALUE_MAX) {
          __property_get_too_small_error();
      }
      return __property_get_real(key, value, default_value);
  }
  
  #endif
  
  #ifdef HAVE_SYSTEM_PROPERTY_SERVER
  /*
   * We have an external property server instead of built-in libc support.
   * Used by the simulator.
   */
  #define SYSTEM_PROPERTY_PIPE_NAME       "/tmp/android-sysprop"
  
  enum {
      kSystemPropertyUnknown = 0,
      kSystemPropertyGet,
      kSystemPropertySet,
      kSystemPropertyList
  };
  #endif /*HAVE_SYSTEM_PROPERTY_SERVER*/
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  