函数原型 int property_get(const char *key, char *value, const char *default_value);

在Hal  用法代码片段:

static const char *variant_keys[] = {
"ro.hardware", /* This goes first so that it can pick up a different file on the emulator. */
"ro.product.board",
"ro.board.platform",
"ro.arch"
};

char prop[PATH_MAX];

/* Loop through the configuration variants looking for a module */
for (i=0 ; i<HAL_VARIANT_KEYS_COUNT; i++) {
   if (property_get(variant_keys[i], prop, NULL) == 0) {
    continue;
}
if (hw_module_exists(path, sizeof(path), name, prop) == 0) {
   goto found;
}
}

我由于没找到 property_get() 的实现源码，对Android property机制也不是很明白。

一直不清楚 property_get 它会把  variant_keys[] 里的值，拷贝到prop 数组吗？

谢谢！