This dummy driver merely writes a message to a system log each time an entry point routine is entered. To test this driver, watch for these messages to confirm that each entry point routine is successfully entered.
The cmn_err(9F) function writes low priority messages such as the messages defined in this dummy driver to /dev/log. The syslogd(1M) daemon reads messages from /dev/log and writes low priority messages to /var/adm/messages.
In a separate window, enter the following command and monitor the output as you perform the tests described in the remainder of this section:
% tail -f /var/adm/messages