Type ASSEMBLE
Source Lines : 1,098
Fixes Applied : 10
Most Recent Version : Thursday, December 7, 1978
Last Fix ID : [HRC039DK]
Module
DMKVDE
Function
TO VERIFY THE EXISTENCE OF A DEVICE WHICH IS BEING ATTACHED.
Attributes
REENTRANT, PAGEABLE, CALLED VIA SVC
Operation
DMKVDEDC - SUBROUTINE TO VERIFY DEVICE EXISTENCE. *
SETS UP AN I/O TASK (TIO) TO SEE IF DEVICE EXISTS. *
IF THE DEVICE DOES NOT EXIST, IT IS MARKED OFFLINE *
AND THE APPROPRIATE RETURN CODE IS PLACED IN SAVER2 *
TO BE PASSED BACK TO DMKVDA. A 'DOES NOT EXIST' MESSAGE *
WILL BE ISSUED BY DMKVDA. *
------------------------------- *
IN ADDITION, FOR DASD DMKVDE *
SETS UP AND EXECUTES AN I/O TASK TO READ THE DASD VOLUME *
LABEL OF THE DEVICE BEING ATTACH'ED. IF SUCCESSFUL, THE *
VOLUME SERIAL IS INSERTED INTO THE 'RDEVSER' FIELD OF THE *
REAL DEVICE BLOCK. RETURN CODES ARE SET IN SAVER2 TO *
INDICATE FAILURE OF THE READ. IF A CP/370 OWNED VOLUME IS *
ENCOUNTERED, A FLAG IS SET IN THE DMKVDA SAVE AREA. *
IF DMKVDE HAS BEEN CALLED WITH PARM=1, MEANING ALLOCATION *
DATA IS PRESENT, DMKVDE WILL READ THE ALLOCATION RECORD *
INTO FREE STORAGE. *
Calls to Other Routines
DMKIOSQR
DMKDSPCH
DMKSCNRU
DMKFREE
DMKFRET