[erlang-questions] escript and epmd

Stefan Strigler <>
Wed Sep 19 18:42:48 CEST 2007


Hi, next question :)

How can I make sure that epmd is running when using escript. I want to
start a named node from within escript and ping some other node like
this:

#!/usr/bin/env escript

main(_) ->
  net_kernel:start([foo, shortnames]),
  erlang:set_cookie(some_random_cookie),
  case net_adm:ping(some_other_node) of
    pong -> ...
    pang -> %% spawn some_other_node
      ...
  end.

But if epmd isn't running already I get:

=INFO REPORT==== 19-Sep-2007::18:50:36 ===
Protocol: "inet_tcp": register error: {{badmatch,{error,econnrefused}},
                                       [{inet_tcp_dist,listen,1},
                                        {net_kernel,start_protos,4},
                                        {net_kernel,start_protos,3},
                                        {net_kernel,init_node,2},
                                        {net_kernel,init,1},
                                        {gen_server,init_it,6},
                                        {proc_lib,init_p,5}]}
escript: script failed with error reason function_clause



Any help appreciated, Steve




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