U520: Developing Applications for z/OS UNIX

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Developing Applications for z/OS UNIX - Topical Outline

Day One

Introduction to the class
    Applications for z/OS UNIX
    Setting the stage: A Level Set
    Setting the stage: Skills to Acquire
    The Ubiquitousness of C
    Computer exercise: Class Lab Set Up

File Access in z/OS UNIX Applications
    What We Already Know
    C functions for accessing QSAM and HFS files
    COBOL - QSAM access
    COBOL - native access to HFS files
    PL/I - accessing QSAM and HFS files
    Assembler - accessing QSAM and HFS files
    Computer exercise: Accessing HFS files under OMVS

Interacting with the user at the OMVS terminal
    COBOL - Using DISPLAY and ACCEPT
    PL/I - Using PUT LIST and GET EDIT
    C printf() and scanf() functions - an introduction
    The CALL interface
    Function references
    Interpreting C language descriptions
    Computer exercise: Using printf() and scanf() - C programmers only

Calling C functions from COBOL
    General notes
    fopen(), fread(), fwrite(), fclose(), printf(), scanf()
    Computer exercise: Using printf() and scanf() - COBOL programmers only

Calling C functions from PL/I
    General notes
    fopen(), fread(), fwrite(), fclose(), printf(), scanf()
    Computer exercise: Using printf() and scanf() - PL/I programmers only

Calling C functions from Assembler
    General notes
    fopen(), fread(), fwrite(), fclose(), printf(), scanf()
    Computer exercise: Using printf() and scanf() - Assembler programmers only

Day Two

Compiling / Assembling, and binding Under OMVS
    Compiling and binding under OMVS
    Archive libraries
    Shell commands: ar
    C370LIBs
    Shell commands: c89
    Computer Exercise: Using c89 to compile and bind
    Computer Exercise: Using c89 to Assemble and bind

Assembling - a new alternative
The as command
Computer Exercise (Optional): Using as to Assemble a program

Compiling COBOL and binding executables
Shell commands: cob2
Computer Exercise: Using cob2 to Compile and bind

Compiling PL/I and binding executables
Shell commands: pli
Computer Exercise: Using pli to Compile and bind

Binding: the ld command
Shell commands: ld
Computer Exercise (Optional, for Assembler programmers): Bind a module

Introduction to Callable UNIX services
    Dynamic calls
    Callable UNIX services
    The BPX1LOD service
    Assembler calling BPX1LOD
    COBOL calling BPX1LOD
    PL/I calling BPX1LOD
    C calling BPX1LOD
    A selection fo callable services
    BPX1... services, concluded
    Computer Exercise: Dynamic calls

Day Three

Parms and Environment Variables
    How the PARM field is set up
    Accessing the PARM field - Assembler
    Accessing the PARM field - COBOL
    Accessing the PARM field - PL/I
    Accessing the PARM field - C
    Accessing the PARM field using CEE3PRM and CEE3PR2
    Parms for subroutines
    The PARM set up under the shell
    Accessing the parm from a program run under the shell
    Determining the environment (CEE3INF)
    Using Environment Variables Under the Shell
    C functions clearenv(), getenv(), putenv(), setenv()
    Using the CEEENV callable LE service
    Computer Exercise: Working With Environment Variables

Managing Applications: Scripts and make
    Application management
    Using shell scripts for application management
    make - the big picture
    Introduction to makefiles
    Makefiles by example
    Computer Exercise: Basic Makefiles

Archive files and make syntax
    Archive files and make
    Target attributes
    Designing makefiles
    Recursive make
    Include files for make
    Special target directives
    The syntax for make
    Computer Exercise: Combining makefiles

More on make
    Target lines: rule operators
    Runtime macros
    Command line prefixes
    Group recipes
    Special target directives, revisited
    Macro modifiers
    Conditionals
    Conclusion

Appendices
    Source programs
    HFS File I/O and C Functions
    Kernel functions for working with HFS files
    HFS File I/O and integrity
    Make and inference rules

Index

Course Objectives
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