Examples
The following is an example of an assembler program using AXREXX
to invoke a REXX exec
to parse the output of DISPLAY JOBS to obtain the address of the ASTE
of *MASTER*.
GETASTE CSECT ,
GETASTE AMODE 31
GETASTE RMODE 31
*
* TITLE: GetAste
*
* Function: Obtain the address of MASTER's aste by invoking
* an exec to parse the output of DISPLAY JOBS,*MASTER*.
* The following exec takes a jobname as an input argument
* and sets the variable OutAste@.
*
*
* NUMERIC DIGITS 25
* ARG InJobname
* MyCmd = 'D JOBS,' || Strip(InJobname);
* Result = AXRCMD(MyCmd,OutputVar.,10);
* IF Result = 0 THEN
* DO;
* OutAste@ = ' '
* DO LineNum = 1 TO OutputVar.0 WHILE(OutASTE@=' ');
* PARSE var OutputVar.LineNum 'ASTE=' OutAste@
* END;
* IF OutAste@ = ' ' THEN
* DO;
* MyRetcode = 8;
* OutAste@ = 0;
* END;
* ELSE
* MyRetcode = 0;
* END;
* ELSE
* DO;
* MyRetcode = 12;
* OutAste@ = 0;
* END;
* EXIT MyRetcode;
*
*
*
************************************************************
BAKR 14,0
USING GETASTE,12
LR 12,15
MODID BR=YES
XC MyArgLst,MyArgLst Clear the ArgLst header
XC MyVarLst,MyVarLst Clear the VarLst header
XC MyArgEn1,MyArgEn1 Clear the Arg entry
XC MyVarEn1,MyVarEn1 Clear the Var entry
LA 2,MyArgLst
USING AxrArgLst,2
MVC AxrArgLstId,MyAxrArgLstAcro
LA 5,AxrArgLstCurVer
ST 5,AxrArgLstVer Initialize the version
LA 5,kNumArgs Obtain the number of arguments
STH 5,AxrArgLstNumber Store the number of arguments
DROP 2
USING AxrArgEntry,2
LA 2,MyArgEn1 Addressability to first arg entry
LA 5,kMaster
ST 5,AXRARGADDRLOW Store address of jobname (*master*)
OI 
AXRARGINPUTFLGS1
,AXRARGINPUT Indicate input arg
LA 5,L'kMaster Obtain length of arg
ST 5,AXRARGLENGTH Store length of arg in entry
MVI AxrArgType,AxrArgTypeChar Store type of arg
DROP 2
LA 2,MyVarLst
USING AxrArgLst,2
MVC AxrArgLstId,MyAxrVarLstAcro
LA 5,AxrArgLstCurVer
ST 5,AxrArgLstVer Initialize the version
LA 5,kNumVars Obtain the number of variables
STH 5,AxrArgLstNumber Store the number of variables
DROP 2
USING AxrArgEntry,2
LA 2,MyVarEn1 Addressability to 1st var entry
LA 5,OutAste@
ST 5,AXRARGADDRLOW Store output argument
LA 5,OutArgName
ST 5,AXRARGNameADDRLOW Store address of name of output var
MVI AxrArgNameLength,L'OutArgName
OI AXRARGINPUTFLGS1,AXRARGOutput Indicate output var
MVI AxrArgType,AxrArgTypeHexString Indicate hex string
LA 5,L'OutAste@ Obtain length (in bytes)
SLL 5,1 Mult by 2 - length is in hex digits (not bytes)
ST 5,AxrArgLength Store length in var entry
DROP 2
AXREXX REQUEST=EXECUTE,NAME=kEXECNAME,REXXARGS=MyArgLst, *
REXXVARS=MyVarLst,REXXDIAG=MyAxrDiag
LTR 15,15
JNZ FailLabel
USING AxrDiag,2
LA 2,MyAxrDiag
TM AxrDiagFlgs1,AxrDiagNoExecRetCode
JNZ FailLabel
L 15,AxrDiagExecRetCode
LTR 15,15
JNZ FailLabel
* Everything looks good. Process OutAste@ here
FailLabel DS 0H
* Perform error checking
* OutAste@ should contain Master's ASTE address
PR
kNumArgs EQU 1
kNumVars EQU 1
DS 0D
MyAxrArgLstAcro DC AL4(AxrArgLstAcro)
MyAxrVarLstAcro DC AL4(AxrVarLstAcro)
kExecName DC CL8'GETASTE '
kMaster DC CL8'*MASTER*'
OUTArgName DC CL8'OUTASTE@'
MyArgLst DS CL(AXRARGLST_LEN)
MyArgEn1 DS CL(AXRARGENTRY_LEN)
MyVarLst DS CL(AXRARGLST_LEN)
MyVarEn1 DS CL(AXRARGENTRY_LEN)
MyAxrDiag DS CL(AXRDIAG_LEN)
OutAste@ DS A
AXRZARG DSECT=YES,AXRARGLST=YES,AXRARGENTRY=YES,AXRDIAG=YES
END MCSOPER CSECT ,
MCSOPER AMODE 31
MCSOPER RMODE 31
*
* TITLE: MCSOPER
*
* Function: Set up an EMCS console. Invoke AXREXX, passing
* it the console name and pass 2 arguments to the exec:
* the command text to invoke and the number of lines of the
* output of the command return to the invoker's EMCS console.
*
*
* /* REXX */
* ARG InCmdText,InNumLines
* AxrCmdRc = AXRCMD(InCmdText,Msg.,4);
* IF AxrCmdRc = 0 THEN
* DO;
* ConnectId = 'FirstLine'
* CALL AXRMLWTO 'Start of cmd output','ConnectId','C'
* DO I = 1 TO InNumLines
* CALL AXRMLWTO Msg.i,'ConnectId','D'
* END;
* CALL AXRMLWTO ,'ConnectId','E' /* End line */
* END;
* EXIT AxrCmdRc
*
*
*
**********************************************************************
BAKR 14,0
USING MCSOPER,12
LAE 12,0(12,0)
LR 12,15
MODID BR=YES
XC MyArgLst,MyArgLst
XC MyArgEn1,MyArgEn1
XC MyArgEn2,MyArgEn2
LA 2,MyArgLst
USING AxrArgLst,2
MVC AxrArgLstId,kAxrArgLstAcro
LA 5,AxrArgLstCurVer
ST 5,AxrArgLstVer Initialize the version
L 5,kNumArgs Obtain the number of arguments
STH 5,AxrArgLstNumber Store the number of arguments
DROP 2
USING AxrArgEntry,2
LA 2,MyArgEn1 Addressability to first arg entry
LA 5,kInCmdText
ST 5,AXRARGADDRLOW Store address of jobname (*master*)
OI AXRARGINPUTFLGS1,AXRARGINPUT Indicate input arg
LA 5,L'kINCmdText Obtain length of arg
ST 5,AXRARGLENGTH Store length of arg in entry
MVI AxrArgType,AxrArgTypeChar Store type of arg
DROP 2
USING AxrArgEntry,2
LA 2,MyArgEn2 Addressability to 2nd arg entry
LA 5,InNumLines
ST 5,AXRARGADDRLOW Store number lines
OI AXRARGINPUTFLGS1,AXRARGInput Indicate input arg
MVI AxrArgType,AxrArgTypeUnsigned Indicate hex string
LA 5,L'InNumLines Obtain length (in bytes)
ST 5,AxrArgLength Store length in arg entry
DROP 2
MODESET MODE=SUP
MCSOPER REQUEST=ACTIVATE,CONSID=MyConsid,TERMNAME=kTERM, *
NAME=kConsname,MCSCSA=MyMcsCsa@,MCSCSAA=MyMcsCsaAlet, *
MsgEcb=MyMsgEcb
AXREXX REQUEST=EXECUTE,NAME=kEXECNAME,REXXARGS=MyArgLst, *
REXXDIAG=MyAxrDiag,CONSDATA=YES,CONSNAME=kConsName, *
CART=kCart
SAC 512
SYSSTATE ASCENV=AR
MCSOPMSG REQUEST=GETMSG,CONSID=MyConsid
* Process the MDB pointed to Reg1/AR1
* The MDB will contain the messages issued by the exec
SYSSTATE ASCENV=P
SAC 0
MCSOPER REQUEST=DEACTIVATE,NAME=kConsName
MODESET MODE=PROB
PR
kExecName DC CL8'MCSOPER '
kConsname DC CL8'TEST1 '
kTerm DC CL8'TEST1'
kCart DC F'1'
kNumArgs DC F'2'
kAxrArgLstAcro DC AL4(AxrArgLstAcro)
kInCmdText DC CL12'D JOBS,ALL '
InNumLines DC F'10'
MyConsid DS F
MyMsgEcb DS F
MyMcsCsa@ DS F
MyMcsCsaAlet DS F
MyAxrDiag DS CL(AXRDIAG_LEN)
MyArgLst DS CL(AXRARGLST_LEN)
MyArgEn1 DS CL(AXRARGENTRY_LEN)
MyArgEn2 DS CL(AXRARGENTRY_LEN)
AXRZARG DSECT=YES,AXRDIAG=YES,AXRARGLST=YES,AXRARGENTRY=YES
END