
  [;1m-spec port_connect(Port, Pid) -> true[0m
  [;1m                      when Port :: port() | atom(), Pid :: pid().[0m

  Sets the port owner (the connected port) to [;;4mPid[0m. Roughly the
  same as [;;4mPort ! {Owner, {connect, Pid}}[0m except for the following:

   • The error behavior differs, see below.

   • The port does not reply with [;;4m{Port,connected}[0m.

   • [;;4mport_connect/1[0m is synchronous, see below.

   • The new port owner gets linked to the port.

  The old port owner stays linked to the port and must call [;;4m[0m
  [;;4munlink(Port)[0m if this is not desired. Any process can set the port
  owner to be any process with [;;4mport_connect/2[0m.

  For comparison: [;;4mPort ! {self(), {connect, Pid}}[0m only fails with [;;4m[0m
  [;;4mbadarg[0m if [;;4mPort[0m does not refer to a port or a process. If [;;4mPort[0m
  is a closed port, nothing happens. If [;;4mPort[0m is an open port and
  the calling process is the port owner, the port replies with [;;4m[0m
  [;;4m{Port, connected}[0m to the old port owner. Notice that the old port
  owner is still linked to the port, while the new is not. If [;;4mPort[0m
  is an open port and the calling process is not the port owner, the 
  port owner fails with [;;4mbadsig[0m. The port owner fails with [;;4mbadsig[0m
  also if [;;4mPid[0m is not an existing local process identifier.

  Notice that any process can set the port owner using [;;4mPort ![0m
  [;;4m{PortOwner, {connect, Pid}}[0m as if it itself was the port owner,
  but the reply always goes to the port owner.

  As from Erlang/OTP R16, [;;4mPort ! {PortOwner, {connect, Pid}}[0m is
  truly asynchronous. Notice that this operation has always been
  documented as an asynchronous operation, while the underlying
  implementation has been synchronous. [;;4mport_connect/2[0m is however
  still fully synchronous because of its error behavior.

  Failures:

   • [;;4mbadarg[0m - If [;;4mPort[0m is not an identifier of an open port, or
     the registered name of an open port. If the calling process
     was previously linked to the closed port, identified by [;;4m[0m
     [;;4mPort[0m, the exit signal from the port is guaranteed to be
     delivered before this [;;4mbadarg[0m exception occurs.

   • [;;4mbadarg[0m - If the process identified by [;;4mPid[0m is not an
     existing local process.
