Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (C)
Guardian Procedure Calls Reference Manual—522629-013
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CHECKOPEN Procedure
(Superseded by FILE_OPEN_CHKPT_ Procedure )
If no error is returned in backerror, the operation must be completed by a call to
AWAITIO in the primary process. If you specify the
tag parameter, the value
returned by AWAITIO is -29D; the returned count and buffer address are
undefined. If the condition code CCL is returned by AWAITIO, the file is
automatically checkclosed by the checkpointing facility. For a nonprocess file or a
process file that is opened in a waited manner, bit <8> of the
flag parameter is
reset internally to zero and ignored.
•
Primary process open
A
backerror value of 17 is returned if a device or process being opened is not, in
its own view, currently open by the primary process. This can occur, for example,
after a device has been rought UP or DOWN.
•
See “Considerations” for the OPEN procedure.
•
Opening a Licensed object file with write or read-write access turns off the License
attribute, even if opened by the Superid.
Messages
•
Unable to communicate with backup
If an “unable to communicate with backup” error occurs (that is,
backerror = -1),
it normally indicates either that the backup process does not exist or that a system
resource problem exists.