tcp_select_from(-Term)

This is similar to tcp_select/1 (see ipc-tcp-trm-select1), but instead of reading the socket that has data available, it returns the term from(Socket), where Socket is socket to some other process. The other terms it may return are

• connected(Socket)
• wakeup(T)
• user_input

as described in the section on tcp_select/1.

It is up to the caller to read from the stream associated with the socket file descriptor, Socket, by using tcp_input_stream/2 and then reading from that stream using the standard stream input predicates, as in

     ...,
     tcp_select_from(from(Socket)),
     tcp_input_stream(Socket, S),
     get0(S,X),
     ...