Open System Services Programmer's Guide

Table 23 Guardian Interprocess-Communication-Related Procedures
OSS NotesGuardian Procedure
CONTROL
Issues CONTROL operations to a process that simulates
an input/output device.
CONTROLBUF
Issues CONTROLBUF operations to a process that simulates
an input/output 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_READ64_
Returns data from an open file to the application process’s
data area using 64-bit addresses.
Beginning with the H06.24 and J06.13 RVUs.FILE_SETMODENOWAIT64_
Set device-dependent functions in a nowait manner on
nowait files.
Beginning with the H06.24 and J06.13 RVUs.FILE_WRITE64_
Writes data from an array in the application program to
an open file using 64-bit addresses.
MESSAGESTATUS
Checks the $RECEIVE file of a server process to see whether
a specific message has been canceled.
READ[X]
Reads information from the $RECEIVE file of a server
process.
SETMODE
Issues SETMODE functions to a process that simulates an
input/output device.
SETMODENOWAIT
Performs the same functions as SETMODE but in a nowait
manner.
SETPARAM
Issues SETPARAM operations to a process that simulates
an input/output device.
WRITE[X]
Sends a message to a server process and waits for a reply
(assuming waited input/output).
206 Interprocess Communication