This section describes how to invoke and terminate the SYSMAIN utility online, in batch or by using an Application Programming Interface.

This section covers the following topics:

• Invoking SYSMAIN Online or Batch

• Invoking SYSMAIN with Appl. Programming Interface

• Terminating SYSMAIN

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Invoking SYSMAIN Online or Batch

The following instructions describe the methods of invoking the SYSMAIN utility by using a direct command (online or batch) or menu functions.

To invoke SYSMAIN online

• From any library, enter the following Natural system command:

  SYSMAIN

  Or:
  From the Natural Main Menu, invoke the Maintenance and Transfer Utilities menu and choose Transfer Objects to Other Libraries.

  A SYSMAIN Utility Main Menu similar to the example below appears:

  12:41:50 ***** NATURAL SYSMAIN UTILITY ***** 2013-04-05 User SAG - Main Menu - Code Object Code Function A Programming Objects C Copy D Debug Environments D Delete E Error Message Texts F Find P Profiles L List R Rules M Move S DL/I Subfiles R Rename V DDMs ? Help X Predict Sets ? Help . Exit . Exit Object Code .. A Function Code .. _ Command ===> Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12--- Help Menu Exit Copy Del Find List Move Ren

  The current setting of the system variable *LIBRARY-ID is passed to SYSMAIN and used as the default source library for processing programming objects and debug environments.

To invoke SYSMAIN in batch

• Use the following direct command:

  SYSMAIN

  followed by one or more command strings. See also Issuing Direct Commands.

Invoking SYSMAIN with Appl. Programming Interface

MAINUSER is an Application Programming Interface (API) that can be used to perform SYSMAIN functions directly from any user-written object (for example, from a subroutine, program or subprogram) without going through the normal steps of invoking SYSMAIN.

Upon completion of processing of the SYSMAIN functions, the utility is terminated and control is returned to the program, subprogram or subroutine from which the request was issued.

MAINUSER is supplied as a cataloged object of the type subprogram in the system library SYSMAIN. MAINUSER can be used in either online or batch mode.

Invoking MAINUSER

MAINUSER is invoked with the CALLNAT statement and its relevant parameters (see also CALLNAT in the Natural Statements documentation). MAINUSER must not be invoked from within the library SYSMAIN.

To invoke MAINUSER

• Issue a CALLNAT statement that contains the following syntax elements:

  CALLNAT 'MAINUSER' command error message library

  where the variable values denote the following parameters:

  Parameter	Natural Data Format/Length	Explanation
  command	A250	The direct command string to be executed by SYSMAIN.
  error	N4	The return code issued by SYSMAIN at the end of processing to indicate a normal end of processing or an error.
  message	A72	The message corresponding to the error given online.
  library	A8	The library containing SYSMAIN. If not specified, the default is SYSMAIN.

  An example of a callable routine is the program MAINCALL in the library SYSMAIN.

Terminating SYSMAIN

To terminate SYSMAIN

• In the Command line of any SYSMAIN screen, enter one of the following direct commands:

  .

  (a period)

  or

  END

  or

  QUIT

  Or:
  Press PF3 (Exit), if required repeatedly.

  Or:
  In batch mode, use the either of the following direct command:

  END

  or

  QUIT

  See also Issuing Direct Commands in the section Using Menu Functions and Commands.