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Device-Dependent Information in Device Drivers

IP.com Disclosure Number: IPCOM000064764D
Original Publication Date: 1985-Sep-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Advani, HG Springen, NL [+details]

Abstract

Physical devices, such as printers, modems and the like, which are supported by the UNIX* operating system appear as an entry in the /dev (for device) directory. Application programs running on UNIX handle devices as if they were files. To send characters to a line printer, for example, the application program issues a system command to the file /dev/lp. However, the UNIX device drivers do not have hard coded device specific information necessary to drive a line printer. Therefore, it is necessary to provide device-dependent information (DDI) for each device supported by the UNIX system. It is desirable to dynamically customize device drivers with specific device-dependent information.