Open System Services Programmer's Guide

Table 27 Guardian I/O Procedures (continued)
OSS NotesGuardian Procedure
CONTROLBUF
Performs device-dependent I/O operations that require a
data buffer.
DEVICE_GETINFOBYLDEV_
Obtains the logical and physical attributes of a device.
Beginning with the H06.24 and J06.13 RVUs.FILE_CONTROL64_
Performs device-dependent I/O operations.
Beginning with the H06.24 and J06.13 RVUs.FILE_CONTROLBUF64_
Performs device-dependent I/O operations requiring a
data buffer.
Beginning with the H06.24 and J06.13 RVUs.FILE_SETMODENOWAIT64_
Set device-dependent functions in a nowait manner on
nowait files.
LABELEDTAPESUPPORT
Provides a way for nonprivileged programs to determine
whether labeled-tape processing is enabled on the system.
SETMODE
Sets device-dependent procedures.
SETMODENOWAIT
Sets device-dependent procedures in a nowait manner on
nowait files.
Guardian I/O Management Procedures 235