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  • Easy Printing from CL, Take Two

    August 30, 2016 Hey, Ted

    When I read your statement that CL cannot write to printer files, I immediately thought, “It can’t? Then what have I been doing for the last couple of decades?” I looked through the article and saw that it didn’t mention my most used method, and I wondered how it was missed.

    –Tom Liotta

    Tom takes advantage of one of the best features of ILE, namely the ability to bind routines written in different languages to form one program. The non-CL procedure that he included is the printf function, which is well-known to C programmers. Even though printf produces stream output, IBM i can make it write record output as well.

    Here’s Tom’s program to list disabled user profiles.

    /* +
       CRTCLMOD MODULE( mylib/LSTUSRDSE )            +
                SRCFILE( mylib/QCLTSRC )             +
                SRCMBR( LSTUSRDSE )                  +
                LOG( *NO )                           +
                                                     +
       CRTPGM PGM( mylib/LSTUSRDSE )                 +
              BNDDIR( QC2LE )                        +
              ACTGRP( *NEW )                         +
              USRPRF( *OWNER )                       +
    */
    pgm  ( +
         )
    
       dcl   &msgdta      *char  128
    
       dcl   &NL          *char    1     value( x'15' )
       dcl   &x00         *char    1     value( x'00' )
    
       dcl   &rc          *int
    
       dcl   &eofUSRDSE   *lgl           value( '0' )
    
    
    /* Compile over the IBM-supplied model file... */
       dclf  QADSPUPB
    
    /* List user profiles to a temporary file... */
       dspusrprf   *ALL  output( *OUTFILE ) outfile( QTEMP/LSTUSRDSE )
    
    /* ...and point the compiled file to our temporary one... */
       ovrdbf      QADSPUPB  tofile( QTEMP/LSTUSRDSE )
    
    /* Set a trivial page heading... */
       chgvar           &msgdta       ( +
                                        'List Disabled Profiles' *cat  +
                                        &NL          *cat  +
                                        &NL          *cat  +
                                        &x00               +
                                      )
    
    /* Assign our printed output to QPRINT... */
       ovrdbf      STDOUT  +
                     tofile( QPRINT )  +
                     ovrscope( *JOB ) +
                     share( *YES )
    
    /* Print our trivial heading... */
       callprc        'printf'            ( +
                                            &msgdta        +
                                          ) +
                                    rtnval(&rc )
    
    /* Now loop through our temporary file until EOF... */
    
       dountil  (&eofUSRDSE )
    
          rcvf
          monmsg ( cpf0864 )  exec( do )
             chgvar &eofUSRDSE   '1'
             iterate
          enddo
    
       /* If this one is '*DISABLED', print a line... */
          if ( &UPSTAT *eq '*DISABLED' )  do
             chgvar     &msgdta       ( +
                                        &UPUPRF      *cat  +
                                        '  '         *cat  +
                                        &UPTEXT      *cat  +
                                        &NL          *cat  +
                                        &x00               +
                                      )
             callprc  'printf'            ( +
                                            &msgdta        +
                                          ) +
                                    rtnval(&rc )
          enddo
       enddo
    
    /* Clear away our override... */
       dltovr      STDOUT  lvl( *JOB )
    
    /* ...and get out of here... */
       return
    
    endpgm
    

    Let’s look at the second printf in more detail.

    chgvar     &msgdta       ( +
                               &UPUPRF      *cat  +
                               '  '         *cat  +
                               &UPTEXT      *cat  +
                               &NL          *cat  +
                               &x00               +
                             )
    callprc  'printf'            ( +
                                   &msgdta        +
                                 ) +
                           rtnval(&rc )
    

    The text to print begins with the contents of two variables with an intervening space. The &NL (new line) variable marks the end of a print line. The &X00 variable signals the end of the string.

    The report looks like this:

    List Disabled Profiles
    
    JNAZIUM     Jim Nazium
    PWOGG       Polly Wogg
    SMANDER     Sally Mander
    

    My thanks to Tom for showing us how to use a tool that I suspect lies dormant on most IBM i systems.

    Ted Holt welcomes your comments and questions. Email him through the IT Jungle Contacts page.

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Volume 16, Number 19 -- August 30, 2016
THIS ISSUE SPONSORED BY:

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