How to Set Up Lock Files for an Allocatable Device

The lock files are zero-length files that are created in the /etc/security/dev directory. One file is created for each allocatable device. If no lock file exists for a device, the device cannot be allocated, so no one can access the device.

1. Become superuser or assume an equivalent role.

2. Obtain the device name for the device from its entry in the device_maps file by using the dminfo command.

   See The device_maps File and the dminfo(1M) and device_maps(4) man pages. For example, the device name for device type st is st0. In the next step, you will use the device name as the name of the lock file.

3. Create an empty lock file for the device by using the touch command.

   Use the device name for the file name in place of device-name.

   # cd /etc/security/dev # touch device-name # chmod 600 device-name # chown bin device-name # chgrp bin device-name