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05.03.2001 at 02:10PM PDT, ID: 20113025
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7.4

Splitting an input file into 2 output files

Asked by JJSmith in Unix Systems Programming

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I have an input file from a legacy COBOL system. The file comprises of 2 batches of records which need splitting into 2 output files with the first line being the batch header followed by the records in the batch - 1 per line. The catch is that the 2 batches and records within are delivered as a single record/line of 100K or more.
All I know is that the first 6 chars is the first batch header and the contents of this tells me the length of the records that follow ( but not how many ), then with no seperation the second batch header is there again specifying the length of records that follow but not how many, although end of file would occur anyway.
I've been advised that it may be possible to seperate these batches using something like AWK - any suggestions?

EXAMPLE LAYOUT:
HEAD10RECORD1001RECORD1002...HEAD07RECORD1RECORD2RECORD3..

HEAD10 - signifies following records of 10 characters
HEAD07 - signifies following records of 7 characters

The batches may arrive in any order in the file, but there is a distinct difference between a batch header record ( always 6 chars ) and a transaction record within the batch. The first batch header is easy to locate but what about the second!!

I'd like a unix script answer if possible - I know it's relatively easy using an application programming language.

Anticipated thanks.
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Zone: Unix Systems Programming
Tags: cobol
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Solution Provided By: chris_calabrese
Participating Experts: 4
Solution Grade: A
 
 
[+][-]05.09.2001 at 01:41AM PDT, ID: 6062409

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