<!-- @license Apache-2.0 Copyright (c) 2018 The Stdlib Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> # getuid > Return the numeric user identity of the calling process. <section class="usage"> ## Usage ```javascript var getuid = require( '@stdlib/process/getuid' ); ``` #### getuid() Returns the numeric user identity of the calling process. ```javascript var id = getuid(); ``` </section> <!-- /.usage --> <section class="notes"> ## Notes - The function **only** returns an `integer` user identity on POSIX platforms. For all other platforms (e.g., Windows, browsers, and Android), the function returns `null`. - See [getuid(2)][getuid]. </section> <section class="examples"> ## Examples <!-- eslint no-undef: "error" --> ```javascript var getuid = require( '@stdlib/process/getuid' ); var uid = getuid(); if ( uid === 0 ) { console.log( 'Likely running as root.' ); } else { console.log( 'uid: %d', uid ); } ``` </section> <!-- /.examples --> <section class="links"> [getuid]: http://man7.org/linux/man-pages/man2/getuid.2.html </section> <!-- /.links -->