1 files changed, 34 insertions, 0 deletions
diff --git a/lib/sasl/doc/src/rel/portc.2.erl b/lib/sasl/doc/src/rel/portc.2.erl
new file mode 100644
index 0000000000..6711177f6a
--- /dev/null
+++ b/lib/sasl/doc/src/rel/portc.2.erl
@@ -0,0 +1,34 @@
+-module(portc).
+-vsn(2).
+-behaviour(gen_server).
+
+-export([get_data/0]).
+-export([init/1, handle_call/3, handle_info/2, code_change/3]).
+
+-record(state, {port, data}).
+
+get_data() -> gen_server:call(portc, get_data).
+
+init([]) ->
+    PortProg = code:priv_dir(foo) ++ "/bin/portc",
+    Port = open_port({spawn, PortProg}, [binary, {packet, 2}]),
+    {ok, #state{port = Port}}.
+
+handle_call(get_data, _From, State) ->
+    {reply, {ok, State#state.data}, State}.
+
+handle_info({Port, Cmd}, State) ->
+    NewState = do_cmd(Cmd, State),
+    {noreply, NewState}.
+
+code_change(_, State, change_port_only) ->
+    State#state.port ! close,
+    receive
+	{Port, closed} -> true
+    end,
+    NPortProg = code:priv_dir(foo) ++ "/bin/portc",   % get new version
+    NPort = open_port({spawn, NPortProg}, [binary, {packet, 2}]),
+    {ok, State#state{port = NPort}};
+code_change(1, State, change_erl_only) ->
+    NState = transform_state(State),
+    {ok, NState}.