如何在Elixir中启动OS进程 [英] How to start an OS process in Elixir

问题描述

在Elixir中启动操作系统进程的最佳方法是什么？

What's the best way to start an OS process in Elixir?

我希望能够在启动时将不同的参数传递给它，

I'd expect to be able to pass different parameters to it on start, capture its PID and then kill it.

推荐答案

您可以使用Ports来实现：

You can use Ports to achieve this:

defmodule Shell do
  def exec(exe, args) when is_list(args) do
    port = Port.open({:spawn_executable, exe}, [{:args, args}, :stream, :binary, :exit_status, :hide, :use_stdio, :stderr_to_stdout])
    handle_output(port)
  end

  def handle_output(port) do
    receive do
      {^port, {:data, data}} ->
        IO.puts(data)
        handle_output(port)
      {^port, {:exit_status, status}} ->
        status
    end
  end
end

iex> Shell.exec("/bin/ls", ["-la", "/tmp"])

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