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The conditions specified in example 1 have changed as follows:
ANNE is on vacation from October 15 to November 15, 2017. She is not permitted to access files during this period.
MARY has changed her working days to Monday, Tuesday and Wednesday.
The review planned for September 3/4 has been postponed until September 07/08.
TEST-GUA, the guard created in example 1, is to be adapted to suit new circumstances.
Solution
* **************************************************************
* * ---------------------------------------------------------- *
* * *
* * MODSAC macro: Change access conditions *
* * ========================================= *
* * *
* * ---------------------------------------------------------- *
* **************************************************************
*
GUA2 CSECT
*
* **************************************************************
* * ---------------------------------------------------------- *
* * MOVE macro *
* * ========== *
* * Task: Move PARMACL parameter area to PARMACC. *
* * Purpose: This macro initializes the PARMACC parameter area *
* * to be passed in register 1 before each call of *
* * the MODSAC macro. *
* * ---------------------------------------------------------- *
* **************************************************************
*
MACRO
MOVE
LA R@TO,PARMACC
LA R@TOL,PROY#
LA R@FR,PARMACL
LA R@FRL,PROY#
ICM R@FRL,8,=C' '
MVCL R@TO,R@FR
MEND
*
* **************************************************************
*
R@TO EQU 6 Destination address
R@TOL EQU 7 Destination field address
R@FR EQU 8 Source address
R@FRL EQU 9 Source field length/fillers
R@BASE EQU 10 Base register
BALR R@BASE,0
USING *,R@BASE
*
* **************************************************************
* * 1. ANNE is on vacation from October 15 to November 15, *
* * 2017. She is not permitted to access files during *
* * this period. *
* **************************************************************
*
MOVE Parameter initialization
MODSAC MF=M, -
ACTION=*MODIFY, -
GUARD='TEST-GUA', -
SUBTYPE=*USER, -
SUBIDS=('ANNE '), -
ADMISS=*PARAMS, -
CKDATE=*EXCLUSION, -
DATEN=1, -
DATE#1=('2017-10-15','2017-11-15')
MODSAC MF=E,PARAM=PARMACC
CLC PROYMRET,=Y(PROPSUCC)
BNE RCNOTOK
*
* **************************************************************
* * 2. MARY has changed her working days to Monday, Tuesday *
* * and Wednesday. *
* **************************************************************
*
MOVE Parameter initialization
MODSAC MF=M, -
ACTION=*MODIFY, -
GUARD='TEST-GUA', -
SUBTYPE=*USER, -
SUBIDS='MARY ', -
ADMISS=*PARAMS, -
CKWEEK=*ADMISSION, -
MO=*YES, -
TU=*YES, -
WE=*YES
MODSAC MF=E,PARAM=PARMACC
CLC PROYMRET,=Y(PROPSUCC)
BNE RCNOTOK
*
* **************************************************************
* * 3. The review planned for September 2/3 has been *
* * postponed until September 09/10. *
* * *
* * Note: *
* * The value for DATE#1 must be specified because the DATE *
* * access conditions can only be changed as a whole. It is *
* * not possible to change individual date intervals. *
* **************************************************************
*
MOVE Parameter initialization
MODSAC MF=M, -
ACTION=*MODIFY, -
GUARD='TEST-GUA', -
SUBTYPE=*GROUP, -
SUBIDS=('TEAMWORK','REVIEWER'), -
ADMISS=*PARAMS, -
CKDATE=*ADMISSION, -
DATEN=2, -
DATE#1=('2017-08-23','2017-08-24'), -
DATE#2=('2017-09-09','2017-09-10')
MODSAC MF=E,PARAM=PARMACC
CLC PROYMRET,=Y(PROPSUCC)
BNE RCNOTOK
*
BE ENDE
*
* **************************************************************
* * Error recovery
* **************************************************************
*
RCNOTOK EQU *
* The possible return code values are listed in the MSGGUAD
* macro
B ENDE
*
ENDE EQU *
TERM
*
*
*
* **************************************************************
* *------------------------------------------------------------*
* * Parameter declarations *
* *------------------------------------------------------------*
* **************************************************************
*
* This parameter area is passed in register 1 when the MODSAC
* macro is called.
*
PARMACC DS 0F
MODSAC MF=C
*
* This parameter area is used in order to initialize the
* PARMACC parameter area before the MODSAC macro is called.
*
PARMACL DS 0F
MODSAC MF=L, -
ACTION=*MODIFY, -
GUARD=' '
*
* **************************************************************
* *------------------------------------------------------------*
* * Declarations of the return codes *
* *------------------------------------------------------------*
* **************************************************************
*
MSGGUAD MF=D
*
* **************************************************************
* *------------------------------------------------------------*
* * Declarations of global variables *
* *------------------------------------------------------------*
* **************************************************************
*
SACMGMT MF=D,XPAND=PARAM
*
END
Result
After the execution of the program, the changed TEST-GUA guard has the following contents:
:PUB1:$TESTUID.TEST-GUA
User ANNE
Date EX ( <2017-10-15,2017-11-15> )
User JOHN has ADMISSION
User MARY
Weekday IN ( MO, TU, WE )
User PAUL
Date IN ( <2017-07-01,2017-09-30> )
Group REVIEWER
Time IN ( <09:00,15:00> )
Date IN ( <2017-08-23,2017-08-24> ,
<2017-09-09,2017-09-10> )
Group TEAMWORK
Time IN ( <09:00,15:00> )
Date IN ( <2017-08-23,2017-08-24> ,
<2017-09-09,2017-09-10> )
Alluser
Time IN ( <07:00,19:00> )
Weekday EX ( SA, SU )