Hi there,
I want to open a os process from elixir and get informed in case it crashes. I tried it with port and link but when I kill the external os process the exit always reports normal.
I was expecting to get something else then normal when it exits abnormal like in kill -9 or kill -15.

Since I am actually using elixir 1.5 my test code looks like:

       :erlang.process_flag(:trap_exit, true)
        port = Port.open({:spawn, "sleep 360"}, [:exit_status])
        Process.link port
        :erlang.monitor :port, port

And I get the following:

{port<0.6363>, {:exit_status, 137}}
{:EXIT, port<0.6363>, :normal}
{:DOWN, reference<0.3242658756.1180172289.143115>, :port, port<0.6363>, :normal}

The only thing I could use as a workaround is the exit status as it looks like.

Does one of you have a good idea how to get link working for this case?

Is this a bug or a feature?

Communication with os processes, killing them or sending signals is quite tricky anyway in erlang…