os.d.ts

declare module "os" {
  /**
   * Returns the operating system name as returned by [`uname(3)`](https://linux.die.net/man/3/uname). For example, it
   * returns `'Linux'` on Linux, `'Darwin'` on macOS, and `'Windows_NT'` on Windows.
   *
   * See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for additional information
   * about the output of running [`uname(3)`](https://linux.die.net/man/3/uname) on various operating systems.
   */
  export function type(): string;

  /**
   * Returns the operating system release as a string.
   *
   * On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used. See
   * [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
   */
  export function release(): string;

  /**
   * Returns a string identifying the kernel version.
   *
   * On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used.
   * See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
   */
  export function version(): string;

  /**
   * Returns a string identifying the operating system platform for which
   * the Node.js binary was compiled. The value is set at compile time.
   */
  export function platform(): Platform;

  /**
   * Returns the operating system's default directory for temporary files as a
   * string.
   */
  export function tmpdir(): string;
}