Merge "init: Don't set ro.serialno when androidboot.serialno is not set"

}

static void export_kernel_boot_props() {

    constexpr const char* UNSET = "";

    struct {

        const char *src_prop;

        const char *dst_prop;

        const char *default_value;

    } prop_map[] = {

        { "ro.boot.serialno",   "ro.serialno",   "", },

        { "ro.boot.serialno",   "ro.serialno",   UNSET, },

        { "ro.boot.mode",       "ro.bootmode",   "unknown", },

        { "ro.boot.baseband",   "ro.baseband",   "unknown", },

        { "ro.boot.bootloader", "ro.bootloader", "unknown", },

        { "ro.boot.hardware",   "ro.hardware",   "unknown", },

        { "ro.boot.revision",   "ro.revision",   "0", },

    };

    for (size_t i = 0; i < arraysize(prop_map); i++) {

        std::string value = GetProperty(prop_map[i].src_prop, "");

        property_set(prop_map[i].dst_prop, (!value.empty()) ? value : prop_map[i].default_value);

    for (const auto& prop : prop_map) {

        std::string value = GetProperty(prop.src_prop, prop.default_value);

        if (value != UNSET)

            property_set(prop.dst_prop, value);

    }

}