read_fd            82 src/dps8/dps8_socket_dev.c          int read_fd;
read_fd           722 src/dps8/dps8_socket_dev.c     sk_data.unit_data[unit_idx][dev_code].read_fd        = socket_fd;
read_fd          1196 src/dps8/dps8_socket_dev.c     ssize_t nread = read (sk_data.unit_data[unit_idx][dev_code].read_fd, & netdata, count);
read_fd          1206 src/dps8/dps8_socket_dev.c     buffer[0] = ((word36) ((word36s) sk_data.unit_data[unit_idx][dev_code].read_fd)) & MASK36;