Contains the byte length of the data. This field is a variable in the iovec structure. Parameters devno Indicates major and minor device numbers. Specifies the extended subroutine parameter. The argument to this parameter must always be in the application space.
All excess data is lost.
Each GDLC supports the dlcread entry point as its switch table entry for the readx subroutine. The file system calls this entry point from the process environment only. The open subroutine, readx subroutine. The ddread device entry point. The dlcmpx entry point of the GDLC device manager, dlcwrite entry point of the GDLC device manager.