Device maps are created when you set up device allocation. A default /etc/security/device_maps file is created by the bsmconv command when the auditing service is enabled. This initial device_maps file can be customized for your site. The device_maps file includes the device names, device types, and device-special files that are associated with each allocatable device.
The device_maps file defines the device-special file mappings for each device, which in many cases is not intuitive. This file allows programs to discover which device-special files map to which devices. You can use the dminfo command, for example, to retrieve the device name, the device type, and the device-special files to specify when you set up an allocatable device. The dminfo command uses the device_maps file to report this information.
fd0:\ fd:\ /dev/diskette /dev/rdiskette /dev/fd0a /dev/rfd0a \ /dev/fd0b /dev/rfd0b /dev/fd0c /dev/fd0 /dev/rfd0c /dev/rfd0:\
Lines in the device_maps file can end with a backslash (\) to continue an entry on the next line. Comments can also be included. A pound sign (#) comments all subsequent text until the next newline that is not immediately preceded by a backslash. Leading and trailing blanks are allowed in any field. The fields are defined as follows:
Specifies the name of the device. For a list of current device names, see How to View Allocation Information About a Device.
Specifies the generic device type. The generic name is the name for the class of devices, such as st, fd, or audio. The device-type field logically groups related devices.
Lists the device-special files that are associated with the physical device. The device-list must contain all of the special files that allow access to a particular device. If the list is incomplete, a malevolent user can still obtain or modify private information. Valid entries for the device-list field reflect the device files that are located in the /dev directory.