Snap for 5652689 from e3cc180d to qt-c2f2-release

#include <functional>

#include <memory>

#include <set>

#include <string>

#include <string_view>

#include <thread>

#include <unordered_set>

#include <android-base/file.h>

#include <android-base/logging.h>

  }

}

// Answers the query on a given property |prop|, by writing the result to the given |sfd|. The

// result will be newline-terminated, so nonexistent or nonallowed query will be answered with "\n".

// If given an empty string, dumps all the supported properties (analogous to `adb shell getprop`)

// in lines, e.g. "[prop]: [value]".

static void RescueGetpropHostService(unique_fd sfd, const std::string& prop) {

  static const std::unordered_set<std::string> kGetpropAllowedProps = {

    "ro.build.fingerprint",

  static const std::set<std::string> kGetpropAllowedProps = {

    "ro.build.date.utc",

    "ro.build.fingerprint",

    "ro.build.flavor",

    "ro.build.id",

    "ro.build.product",

    "ro.build.tags",

    "ro.build.version.incremental",

    "ro.product.device",

    "ro.product.vendor.device",

  };

  auto allowed = kGetpropAllowedProps.find(prop) != kGetpropAllowedProps.end();

  if (!allowed) {

    return;

  std::string result;

  if (prop.empty()) {

    for (const auto& key : kGetpropAllowedProps) {

      auto value = android::base::GetProperty(key, "");

      if (value.empty()) {

        continue;

      }

      result += "[" + key + "]: [" + value + "]\n";

    }

  } else if (kGetpropAllowedProps.find(prop) != kGetpropAllowedProps.end()) {

    result = android::base::GetProperty(prop, "") + "\n";

  }

  auto result = android::base::GetProperty(prop, "");

  if (result.empty()) {

    return;

    result = "\n";

  }

  if (!android::base::WriteFully(sfd, result.data(), result.size())) {

    exit(kMinadbdHostSocketIOError);