SAS(R) 9.1.3 Companion for z/OS

Figure A1.5 Parse Options FRCB
R1
+0
+4
+8
+12
+16
+20
Using the INFILE/FILE User Exit Facility Open Function 581
Parse Options
function (PARSFUNC):4
Pointer to User Exit
BAG Control Block
(PARSEXIT)
Length of the
Option Name String
(PARSOPTL)
Pointer to the
Option Name
(PARSOPTN)
Length of the
Option Value String
(PARSVALL)
Pointer to the
Option Value
(PARSVAL)
UEBCB
String
String
When the Parse Options function receives control, PARSOPTL is set to the length of
the option name, and the address of the option name is stored in PARSOPTN. For
options that take a value, PARSVALL is set to the length of the value, and the address
of the option value is stored in PARSVAL. For options that do not take a value, both
PARSVALL and PARSVAL are set to 0.
If an invalid option name or option value is detected, R15 should be set to a return
code value of 8.
Open Function
SAS invokes the Open function after INFILE or FILE statement processing opens
the associated data set. The following figure illustrates the Open FRCB and its
relationship to other control blocks: