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Showing content from https://cloud.google.com/cpp/docs/reference/oslogin/2.19.0 below:

C++ Client Libraries | Google Cloud

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Cloud OS Login API C++ Client Library

An idiomatic C++ client library for the Cloud OS Login API, a service you can use to manage access to your VM instances using IAM roles.

While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.

Quickstart

The following shows the code that you'll run in the google/cloud/oslogin/quickstart/ directory, which should give you a taste of the Cloud OS Login API C++ client library API.

#include "google/cloud/oslogin/v1/os_login_client.h"
#include <iostream>
#include <string>

int main(int argc, char* argv[]) try {
  if (argc != 2) {
    std::cerr << "Usage: " << argv[0] << " user\n";
    return 1;
  }

  namespace oslogin = ::google::cloud::oslogin_v1;
  auto client =
      oslogin::OsLoginServiceClient(oslogin::MakeOsLoginServiceConnection());

  auto const name = "users/" + std::string{argv[1]};
  auto lp = client.GetLoginProfile(name);
  if (!lp) throw std::move(lp).status();
  std::cout << lp->DebugString() << "\n";

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}
Main classes

The main class in this library is oslogin_v1::OsLoginServiceClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock oslogin_v1::OsLoginServiceClient when testing your application.

More Information

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This webpage details the C++ client library for the Cloud OS Login API, which manages access to VM instances via IAM roles."],["The latest release candidate version is 2.37.0-rc, but it also lists previous versions of the library, all the way down to 2.11.0, and version 2.19.0, where most documentation is linked to."],["The library's primary class is `oslogin_v1::OsLoginServiceClient`, which houses all Remote Procedure Calls (RPCs), with other classes offering support for testing and configuration."],["While the C++ client library is generally available (GA), it does not adhere to Semantic Versioning guidelines."],["The page offers guidance on error handling, customizing the endpoint and authentication, adjusting retry policies, and utilizing environment variables for configuration."]]],[]]


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