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Asked: 2026-06-16T01:35:01+00:00

I want to write a some kind of supervisor and I’m trying to implement

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I want to write a some kind of supervisor and I’m trying to implement function that closes an external program. The external process is connected to an erlang’s code with a port. I have no idea how to close this program, by sending a signal or anything else. Closing a port is not a solution, becouse I’ve checked that many programs doesn’t exit on SIGPIPE. Have you got any ideas how to do it?

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  1. Editorial Team

    You can use 

    {os_pid, OsPid} = erlang:port_info(Port, os_pid).

    to get the pid of the process in the OS (see http://erlang.org/doc/man/erlang.html#port_info-1 – I think you may need a recent version of Erlang for this to be included, I think the one installed by apt-get on Ubuntu 12.04 isn’t recent enough, I know R15B02 has it though) and then 

    os:cmd(io_lib:format("kill -9 ~p", [OsPid])).

    to kill it (http://erlang.org/doc/man/os.html#cmd-1).

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