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How the mainframe utilities are developed

 
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nkothako

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Joined: 26 Nov 2008
Posts: 125
Location: chennai

PostPosted: Wed Feb 08, 2012 3:15 am    Post subject: How the mainframe utilities are developed
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Hey,

Is someone aware how the mainframe utilities are developed

ex: IDCAMS,IKJEFT01 etc.,

Please give me an idea which technologies used.
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enrico-sorichetti

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Joined: 14 Mar 2007
Posts: 10211
Location: italy

PostPosted: Wed Feb 08, 2012 3:31 am    Post subject: Reply to: How the mainframe utilities are developed
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the question is clear as mud icon_cool.gif
but ...
generally IBM software is developed using ASSEMBLER or PL/X-390
( before that was PL/X-370 and before that was PL/AS and before that PL/S )
( an IBM internal use only HLL with a PL/I like syntax with additional clauses for REGISTER management and ASSEMBLER inlining with a pretty powerful MACRO language)

to see how a structure is coded in PL/xx
use ISPF to VIEW SYS1.MACLIB(CVT)

then enter the commands
EXCLUDE ALL
FIND '*' 1 ALL

scroll down until You see some PL/I like statements


the % stuff are macro/preprocessor stetements

good lurking


for a better examples do the same on SYS1.SAMPLIB(ACYCMS3A)
where You can see some register utilization directives and assembler inlining
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