This function opens and sequentially reads the networks database
    file (TCPIP$SYSTEM:NETWORKS.DAT) to retrieve network information.
    Returns a pointer to a netent structure that contains the
    equivalent fields for a network description line in the networks
    database file. The netent structure is defined in the NETDB.H
    header file.
    The networks database file remains open after a call by the
    getservent() function. Use the endnetent()  function to close the
    networks database file. Use the setnetent() function to open the
    networks database file and reset the file marker to the beginning
    of the file.
    The getnetent() function uses a common static area for its
    return values, so subsequent calls to this function overwrite
    any existing network entry. To save the network entry, you must
    make a copy of it.
    Related Functions
    See also setnetent and endnetent.