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Figure 1 - Sample CL program
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/* ================================================================ */
/* = From "The Essential CL Style Guide," NEWS/400, July 1999. = */
/* = Program....... EZChgDftC = */
/* = Type.......... Command processing program for EZChgDft = */
/* = Description... EZ Change command defaults = */
/* = = */
/* = This program receives a command string and = */
/* = for each parameter specified attempts to = */
/* = change the command defaults. = */
/* = = */
/* = Because the prompter requires that all = */
/* = required parameters be specified, it is not = */
/* = possible to omit required parameters from = */
/* = the command string this program receives = */
/* = as input. Instead, these parameters must = */
/* = be stripped from the command string. The = */
/* = program monitors for error messages that = */
/* = are returned from CHGCMDDFT to identify = */
/* = the parameters that must be stripped. This = */
/* = also applies not only to those parameters = */
/* = that are required but also to errors that = */
/* = might result from such actions as trying = */
/* = to change the default value for parameters = */
/* = that have no default value. = */
/* = ---------------------------------------------------------- = */
/* = Parameter interface = */
/* = = */
/* = Parameter Type Description = */
/* = = */
/* = &CmdStr Input Command string for which to = */
/* = change command defaults = */
/* ================================================================ */
Pgm ( &CmdStr )
/* ================================================================ */
/* = Variable declarations = */
/* ================================================================ */
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Dcl &CmdStr *Char ( 2088 )
Dcl &CmdStrLenA *Char ( 2 )
Dcl &CmdStrLen *Dec ( 4 0 )
Dcl &CmdStrPos *Dec ( 4 0 )
Dcl &ChgStr *Char ( 3000 ) ( 'CHGCMDDFT ' )
Dcl &ChgStrLen *Dec ( 4 0 ) ( 10 )
Dcl &ChgStrPos *Dec ( 4 0 )
Dcl &Cmd *Char ( 10 )
Dcl &CmdLib *Char ( 10 )
Dcl &CmdPos *Dec ( 4 0 )
Dcl &Len *Dec ( 4 0 )
Dcl &Usr *Char ( 10 )
Dcl &MsgID *Char ( 7 )
Dcl &MsgDta *Char ( 100 )
Dcl &MsgF *Char ( 10 )
Dcl &MsgFLib *Char ( 10 )
Dcl &ErrorSw *Lgl
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/* ================================================================ */
/* = Global error monitor = */
/* ================================================================ */
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MonMsg ( CPF0000 MCH0000 ) Exec( +
Goto Error )
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/* ================================================================ */
/* = Set logging options based on user profile = */
/* ================================================================ */
RtvJoba User( &Usr )
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If ( &Usr *Eq 'QSECOFR' ) +
Call EzChgDftC1
Else +
Call EzChgDftC2
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C |
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/* ================================================================ */
/* = Parse command string into length and actual command string = */
/* ================================================================ */
ChgVar &CmdStrLenA ( %Sst( &CmdStr 1 2 ) )
ChgVar &CmdStrLen ( %Bin( &CmdStrLenA ) )
ChgVar &CmdStr ( %Sst( &CmdStr 3 &CmdStrLen ) )
/* ================================================================ */
/* = Get command name and library name for completion message = */
/* ================================================================ */
ChgVar &CmdLib ( '*LIBL' )
ChgVar &CmdPos ( 1 )
ChgVar &CmdStrPos ( 1 )
GetCmdEnd:
ChgVar &CmdStrPos ( &CmdStrPos + 1 )
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If ( %Sst( &CmdStr &CmdStrPos 1 ) *Eq '/' ) +
Do
ChgVar &Len ( &CmdStrPos - 1 )
ChgVar &CmdLib ( %Sst( &CmdStr 1 &Len ) )
ChgVar &CmdPos ( &CmdStrPos + 1 )
EndDo
If ( %Sst( &CmdStr &CmdStrPos 1 ) *NE ' ' ) +
GoTo GetCmdEnd
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D |
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ChgVar &Len ( &CmdStrPos - &CmdPos )
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ChgVar &Cmd ( %Sst( &CmdStr &CmdPos &Len ) )
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ChgVar &CmdPos ( &CmdStrPos )
RtvObjD Obj( &CmdLib/&Cmd ) +
ObjType( *CMD ) +
RtnLib( &CmdLib )
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/* ================================================================ */
/* = Build change command string one character at a time = */
/* ================================================================ */
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ChgVar &ChgStrPos ( &ChgStrLen )
ChgVar &CmdStrPos ( 0 )
AddNxt:
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/* ---------------------------------------------------------------- */
/* - Check to see if end of command has been reached - */
/* ---------------------------------------------------------------- */
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ChgVar &CmdStrPos ( &CmdStrPos + 1 )
If ( &CmdStrPos *GT &CmdStrLen ) +
GoTo AddEndDft
/* ---------------------------------------------------------------- */
/* - Check to see if within maximum length for change command - */
/* ---------------------------------------------------------------- */
ChgVar &ChgStrPos ( &ChgStrPos + 1 )
If ( &ChgStrPos *GT 3000 ) +
GoTo StrLenErr
/* ---------------------------------------------------------------- */
/* - If at end of command name, insert beginning delimiter of (' - */
/* - for parameters - */
/* ---------------------------------------------------------------- */
If ( &CmdStrPos *Eq &CmdPos ) +
Do
ChgVar &ChgStrPos ( &ChgStrPos + 1 )
ChgVar ( %Sst( &ChgStr &ChgStrPos 1 ) ) ( '(' )
ChgVar &ChgStrPos ( &ChgStrPos + 1 )
ChgVar ( %Sst( &ChgStr &ChgStrPos 1 ) ) ( '''' )
GoTo AddNxt
EndDo
/* ---------------------------------------------------------------- */
/* - Copy character from command to change command. If the - */
/* - character is ' then add another ' character to the change - */
/* - command string. Also, make sure change command is within - */
/* - maximum length. - */
/* ---------------------------------------------------------------- */
ChgVar ( %Sst( &ChgStr &ChgStrPos 1 ) ) +
( %Sst( &CmdStr &CmdStrPos 1 ) )
If ( %Sst( &ChgStr &ChgStrPos 1 ) *Eq '''' ) +
Do
ChgVar &ChgStrPos ( &ChgStrPos + 1 )
If ( &ChgStrPos *GT 3000 ) +
GoTo StrLenErr
ChgVar ( %Sst( &ChgStr &ChgStrPos 1 ) ) ( '''' )
EndDo
GoTo AddNxt
/* ---------------------------------------------------------------- */
/* - Insert ending delimiter of ') for parameters and make sure - */
/* - change command is within maximum length - */
/* ---------------------------------------------------------------- */
AddEndDft:
ChgVar &ChgStrPos ( &ChgStrPos + 1 )
If ( &ChgStrPos *GT 3000 ) +
GoTo StrLenErr
ChgVar ( %Sst( &ChgStr &ChgStrPos 1 ) ) ( '''' )
ChgVar &ChgStrPos ( &ChgStrPos + 1 )
If ( &ChgStrPos *GT 3000 ) +
GoTo StrLenErr
ChgVar ( %Sst( &ChgStr &ChgStrPos 1 ) ) ( ')' )
/* ================================================================ */
/* = Execute the CHGCMDDFT command = */
/* ================================================================ */
Execute:
RmvMsg Clear( *ALL )
Call QCMDEXC +
( &ChgStr 3000 )
MonMsg ( CPF0000 ) Exec( +
GoTo ChgCmdErr )
/* ---------------------------------------------------------------- */
/* - CHGCMDDFT command succeeded. Send a completion message and - */
/* - exit. - */
/* ---------------------------------------------------------------- */
ChgVar &MsgDta ( &Cmd *Cat &CmdLib )
SndPgmMsg MsgID( CPC6260 ) +
MsgF( QSYS/QCPFMSG ) +
MsgDta( &MsgDta ) +
MsgType( *Comp )
Return
/* ================================================================ */
/* = Generated command string is too long = */
/* ================================================================ */
StrLenErr:
RmvMsg Clear( *ALL )
SndPgmMsg MsgID( CPF9897 ) +
MsgF( QSYS/QCPFMSG ) +
MsgDta( 'Command string is too long.' ) +
MsgType( *DIAG )
Return
/* ================================================================ */
/* = Error in CHGCMDDFT - try to handle = */
/* ================================================================ */
ChgCmdErr:
RcvMsg MsgType( *DIAG ) +
Rmv( *YES ) +
MsgDta( &MsgDta ) +
MsgID( &MsgID )
/* ---------------------------------------------------------------- */
/* - If CHGCMDDFT command fails with one of the following - */
/* - diagnostic messages, strip the parameter out of the command - */
/* - string. This can occur if the parameter does not have a - */
/* - default value (such as a required parameter), for a list - */
/* - item with no default value, or for a qualifier (such as a - */
/* - library name) with no default value. After removing the - */
/* - parameter, execute the CHGCMDDFT command again. - */
/* ---------------------------------------------------------------- */
If ( ( &MsgID *Eq 'CPD6260' ) +
*Or ( &MsgID *Eq 'CPD6261' ) +
*Or ( &MsgID *Eq 'CPD6262' ) ) +
Do
Call EZChgDftC3 +
( &ChgStr &MsgDta )
Goto Execute
EndDo
/* ---------------------------------------------------------------- */
/* - If CHGCMDDFT command fails with the following diagnostic - */
/* - message, add a null placeholder for the missing entry. - */
/* - This can occur when a single value is specified in a list - */
/* - (such as the SIZE parameter with value *NOMAX specified on - */
/* - the CHGPF command). After adding the null placeholder, - */
/* - execute the CHGCMDDFT command again. - */
/* ---------------------------------------------------------------- */
If ( &MsgID *Eq 'CPD6273' ) +
Do
Call EZChgDftC4 +
( &ChgStr &MsgDta )
Goto Execute
EndDo
/* ---------------------------------------------------------------- */
/* - If CHGCMDDFT command fails with one of the following - */
/* - diagnostic messages, just ignore the change request. This - */
/* - can occur when the request results in no parameters being - */
/* - changed. This can happen due to the data entered by the - */
/* - user or as a result of stripping out parameters with no - */
/* - default value (for instance, all parameters may be stripped - */
/* - out). - */
/* ---------------------------------------------------------------- */
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If ( ( &MsgID *Eq 'CPD1013' ) +
*Or ( &MsgID *Eq 'CPD1014' ) ) +
Do
RmvMsg Clear( *ALL )
SndPgmMsg MsgID( CPF9897 ) +
MsgF( QSYS/QCPFMSG ) +
MsgDta( 'No parameters selected for change.' ) +
MsgType( *DIAG )
Return
EndDo
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/* ---------------------------------------------------------------- */
/* - CHGCMDDFT command failed for an unknown reason. Let normal - */
/* - error processing take control. - */
/* ---------------------------------------------------------------- */
Goto Error
/* ================================================================ */
/* = Error handler = */
/* ================================================================ */
Error:
If ( &ErrorSw ) +
SndPgmMsg MsgID( CPF9897 ) +
MsgF( QSYS/QCPFMSG ) +
MsgDta( 'An unexpected error occurred. See job log.' ) +
MsgType( *Escape )
ChgVar &ErrorSw ( '1' )
RcvMsg MsgType( *Excp ) +
MsgDta( &MsgDta ) +
MsgID( &MsgID ) +
MsgF( &MsgF ) +
MsgFLib( &MsgFLib )
SndPgmMsg MsgID( &MsgID) +
MsgF( &MsgFLib/&MsgF ) +
MsgDta( &MsgDta ) +
MsgType( *Diag )
/* ================================================================ */
/* = End of program = */
/* ================================================================ */
EndPgm
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