Waiting for Ruby child pid to exit

Question

I\'m trying to fork a sub-process, wait for it to finish, if it doesn\'t finish within a certain amount of time, kill it.

This is what I have so far:

ser         


        

Answer 1

Use the Timeout module: (code from http://www.whatastruggle.com/timeout-a-subprocess-in-ruby)

require 'timeout'

servers.each do |server|
    pid = fork do
        puts "Forking #{server}."
        output = "doing stuff here"
        puts output
    end

    begin
        Timeout.timeout(20) do
            Process.wait
        end
    rescue Timeout::Error
        Process.kill 9, pid
        # collect status so it doesn't stick around as zombie process
        Process.wait pid
    end
    puts "#{server} child exited, pid = #{pid}"
end