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reading the SYSIN parm file with in a loop

 
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yogi.47eie

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Joined: 16 Aug 2006
Posts: 28
Location: india

PostPosted: Tue Sep 05, 2006 1:36 pm    Post subject: reading the SYSIN parm file with in a loop
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Hi ,
I am going to read a SYSIN parm file,with in a loop.Scenario is like this,
I am reading theSYSIN parm file,when i read the 4 th record it is satisfying my condition,then control is coming out of the loop.Next time i am reading the parm file,At that time i am expecting to read the first record again.But when i enter into the loop again my control is going to the 5 th record onwards.Can i read the SYSIN file from the first record?Like a PS file can i close and open the SYSIN parm file ,so that i can read from the first record?
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raghunathns

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Joined: 08 Dec 2005
Posts: 127
Location: rochester

PostPosted: Tue Sep 05, 2006 11:29 pm    Post subject: Re: reading the SYSIN parm file with in a loop
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SYSIN is only for instream. it is not possible to read twice.

if you want you can read and store in an array and then process the array. multiple times.

or

use another dd. and work as a seq file.
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DavidatK

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Joined: 22 Nov 2005
Posts: 700
Location: Troy, Michigan USA

PostPosted: Wed Sep 06, 2006 4:47 am    Post subject: Re: reading the SYSIN parm file with in a loop
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yogi.47eie,

Yes, you can, treat it as any other file, use ?SELECT?, ?FD?, ?OPEN/CLODE?.

Code:

FILE-CONTROL.                                         
                                                     
    SELECT SYSIN-FILE                                 
    ASSIGN TO SYSIN.                                 
                                                     
DATA DIVISION.                                       
FILE SECTION.                                         
FD  SYSIN-FILE                                       
    LABEL RECORDS STANDARD                           
    BLOCK CONTAINS 0 RECORDS.                         
01  SYSIN-REC                PIC X(80).               
                                                     
WORKING-STORAGE SECTION.                             
                                                     
LINKAGE SECTION.                                     
                                                     
PROCEDURE DIVISION.                                   
                                                     
PROGRAM-START.                                 
                                               
    OPEN INPUT SYSIN-FILE.                     
                                               
    PERFORM 4 TIMES                             
        READ SYSIN-FILE                         
        DISPLAY SYSIN-REC                       
    END-PERFORM.                               
                                               
    CLOSE SYSIN-FILE.                           
                                               
    OPEN INPUT SYSIN-FILE.                     
                                               
    PERFORM 4 TIMES                             
        READ SYSIN-FILE                         
        DISPLAY SYSIN-REC                       
    END-PERFORM.                               
                                               
    CLOSE SYSIN-FILE.                           

    GOBACK.


JCL
Code:

//JS00100  EXEC PGM=#TEST                         
//STEPLIB  DD DSN=YOUR.PDS.LOADLIB,DISP=SHR
//SYSIN    DD *                                   
RECORD 1                                           
RECORD 2                                           
RECORD 3                                           
RECORD 4                                           
RECORD 5                                           
RECORD 6                                           
RECORD 7                                           
RECORD 8                                           
/*                                                 
//SYSOUT   DD SYSOUT=*                             
//SYSPRINT DD SYSOUT=*


Results

Code:

.SARPAGE 4                   
.                           
.RECORD 1                   
.RECORD 2                   
.RECORD 3                   
.RECORD 4                   
.RECORD 1                   
.RECORD 2                   
.RECORD 3                   
.RECORD 4                   


Dave
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yogi.47eie

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Joined: 16 Aug 2006
Posts: 28
Location: india

PostPosted: Thu Sep 14, 2006 5:55 pm    Post subject:
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Hi David ,
Thanks a lot ,as per the request they asked us to use the table logic ,it went fine.

Regards
Yogi
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