EpmdUp

A simple Elixir module to check and manage the Erlang Port Mapper Daemon (epmd).

Overview

EpmdUp provides functionality to verify the status and location of epmd, which is a critical component in Erlang/Elixir distributed systems. The Erlang Port Mapper Daemon is responsible for tracking which nodes are running on a host and which ports they are using for distributed communication.

Features

• activate/0: Starts epmd if it's not already running
• active?/0: Check if epmd is active and accepting connections
• deactivate/0: Stops epmd if it's running
• find_epmd_executable/0: Find the full path of the epmd executable in the system
• Cross-platform support (Linux, macOS, Windows)

Installation

The package can be installed by adding epmd_up to your list of dependencies in mix.exs:

def deps do
  [
    {:epmd_up, "~> 1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/epmd_up.

Tested Platforms

• Ubuntu 22.04 / Elixir 1.19 / OTP 28
• Ubuntu 22.04 / Elixir 1.18 / OTP 28
• Ubuntu 22.04 / Elixir 1.18 / OTP 27
• Ubuntu 22.04 / Elixir 1.17 / OTP 27
• Ubuntu 22.04 / Elixir 1.16 / OTP 26
• Ubuntu 22.04 / Elixir 1.15 / OTP 26
• Windows 2022 / Elixir 1.19 / OTP 28
• Windows 2022 / Elixir 1.18 / OTP 28
• macOS Sonoma on Apple Silicon / Elixir 1.18 / OTP 28

License

Copyright (c) 2025 University of Kitakyushu

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.