lib/libUPnP/Neptune/Source/System/Android/NptAndroidLogConfig.cpp

   1 extern "C" {
   2 #include <sys/system_properties.h>
   3 }
   4 #include <android/log.h>
   5 #include <dlfcn.h>
   6 #include "NptLogging.h"
   7
   8 /*----------------------------------------------------------------------
   9 |   android_property_get
  10 +---------------------------------------------------------------------*/
  11 static int android_property_get(const char* name, char* value) {
  12     static int (*__real_system_property_get)(const char*, char*) = NULL;
  13     if (__real_system_property_get == NULL) {
  14         void* handle = dlopen("libc.so", 0);
  15         if (!handle) {
  16              __android_log_print(ANDROID_LOG_DEBUG, "Neptune", "Cannot dlopen libc.so: %s", dlerror());
  17              return 0;
  18         }
  19         __real_system_property_get = reinterpret_cast<int (*)(const char*, char*)>(
  20                                         dlsym(handle, "__system_property_get"));
  21         if (!__real_system_property_get) {
  22              __android_log_print(ANDROID_LOG_DEBUG, "Neptune", "Cannot resolve __system_property_get(): %s", dlerror());
  23              return 0;
  24         }
  25     }
  26     return (*__real_system_property_get)(name, value);
  27 }
  28
  29 /*----------------------------------------------------------------------
  30 |   NPT_GetSystemLogConfig
  31 +---------------------------------------------------------------------*/
  32 NPT_Result
  33 NPT_GetSystemLogConfig(NPT_String& config)
  34 {
  35     char android_npt_config[PROP_VALUE_MAX];
  36     android_npt_config[0] = 0;
  37     int prop_len = android_property_get("persist.neptune_log_config",
  38                                          android_npt_config);
  39     if (prop_len > 0) {
  40         config = android_npt_config;
  41         return NPT_SUCCESS;
  42     } else {
  43         return NPT_ERROR_NO_SUCH_PROPERTY;
  44     }
  45 }