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Writing to the IFS
based upon code written by: Scott Klement
This program, based on Scott Klement's work, writes records to the IFS.
Can it be more complicated? Sure. But this is a simplified starting place
that will work to get you started.
The directory and file may be viewed with the WRKLNK command and Option 5
to navigate to the directory and file.
You will want to change the directory and file to names of your choosing,
and of course add your own method of populating the file with real data.
You may choose to add records to an existing file (APPEND) or replace the
existing records (TRUNC). If the directory and/or file do not exist they
will be created.
This program can be copy & pasted, and will run as-is so that you can see
if it works on your own machine:
WITH THIS ONE CHANGE:
Change the cDirPath &
change the cFileName !!
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The RPG to write a file to the IFS
//*********************************************************************
// ___ _ _ __ __ _ _ *
// | . > ___ ___ _| |_ | |_ | \ \ ___ _ _ _| |_ <_>._ _ *
// | . \/ . \/ . \ | | | . | | |<_> || '_> | | | || ' | *
// |___/\___/\___/ |_| |_|_| |_|_|_|<___||_| |_| |_||_|_| *
// *
// A program to write a report to the IFS *
// *
// IFSFILER *
// *
// 12/2012 booth@martinvt.com *
//*********************************************************************
// COMMENTS -= This all comes from Scott Klement =- *
// ======================================= *
// *
// - cDirPath is your name for your desired directory. *
// cFileName is your name for your desired file. *
// Be sure to change them to names meaningful to you. *
// *
// - The lines are all defined as 132 long. *
// *
// - Note the fields CRLF, CR, & LF. *
// CR = Carriage Return *
// LF = Line Feed *
// This will be handy for you when you are constructing *
// real records, later. *
// *
// *
//*********************************************************************
H COPYRIGHT('(C) Copyright Booth Martin, 2012, All rights reserved.')
H option(*nodebugio) dftactgrp(*no) actgrp(*new)
//--------------------------------------------------------------------*
// FILES *
//--------------------------------------------------------------------*
//--------------------------------------------------------------------*
// DEFINITIONS *
//--------------------------------------------------------------------*
// Constants
// Path and name for IFS Output.
D cDirPath c '/www/bmartin/testdir/'
D cFileName c 'test.txt'
//*********************************************************************
// Flags for use in open()
//
// More than one can be used -- add them together.
//*********************************************************************
// Reading Only
D O_RDONLY c 1
// Writing Only
D O_WRONLY c 2
// Reading & Writing
D O_RDWR c 4
// Create File if not exist
D O_CREAT c 8
// Exclusively create
D O_EXCL c 16
// Truncate File to 0 bytes
D O_TRUNC c 64
// Append to File
D O_APPEND c 256
// Convert text by code-page
D O_CODEPAGE c 8388608
// Open in text-mode
D O_TEXTDATA c 16777216
//*********************************************************************
// Mode Flags.
// basically, the mode parm of open(), creat(), chmod(),etc
// uses 9 least significant bits to determine the
// file's mode. (people's access rights to the file)
//
// user: owner group other
// access: R W X R W X R W X
// bit: 8 7 6 5 4 3 2 1 0
//
// (This is accomplished by adding the flags below to get the mode)
//*********************************************************************
// owner authority
D S_IRUSR C 256
D S_IWUSR C 128
D S_IXUSR C 64
D S_IRWXU C 448
// group authority
D S_IRGRP C 32
D S_IWGRP C 16
D S_IXGRP C 8
D S_IRWXG C 56
// other people
D S_IROTH C 4
D S_IWOTH C 2
D S_IXOTH C 1
D S_IRWXO C 7
D mkdir PR 10I 0 ExtProc('mkdir')
D path * Value options(*string)
D mode 10U 0 Value
D open PR 10I 0 extproc('open')
D path * value options(*string)
D oflag 10I 0 value
D mode 10U 0 value options(*nopass)
D codepage 10U 0 value options(*nopass)
D write PR 10I 0 extproc('write')
D fildes 10I 0 value
D buf * value
D nbyte 10U 0 value
D/if not defined(CLOSE_PROTOTYPE)
D close PR 10I 0 extproc('close')
D fildes 10I 0 value
D/define CLOSE_PROTOTYPE
D/endif
// Working fields.
D wNdx s 10i 0
D wMsg s 132
D wDirPath s 132 varying
D wFileName s 132 varying
D cASCII c 819
D CRLF c x'0D0A'
D CR c x'0D'
D LF c x'0A'
D OpenFlags s 10i 0
D FileModes s 10u 0
D wFileDesc s 10i 0
D wFD s 10i 0
/FREE
//====================================================================*
// MAINLINE-BEGIN *
//====================================================================*
wDirPath = cDirPath;
wFileName = cFileName;
// Create a directory, if it is not there:
wFD = mkdir(wDirPath:
S_IRUSR+S_IWUSR+S_IXUSR+
S_IRGRP+S_IWGRP+S_IXGRP+
S_IROTH+S_IXGRP);
// Create a file, add records to a file, or clear file and then add records.
// OpenFlags = O_RDWR + O_CREAT + O_APPEND; // adds records to file
OpenFlags = O_RDWR + O_CREAT + O_TRUNC; // clears file first.
FileModes = S_IRUSR + S_IWUSR + S_IRGRP;
wFD = Open
(%trim(wDirPath + wFileName): OpenFlags: FileModes);
// If an error:
if wFD < 0;
dsply '' ' ' wFD;
exsr ExitPgm;
endif;
// Write records to the file. (Replace or Append, as chosen above.)
exsr WriteFile;
// Close the IFS File
callp Close(wFD);
// Exit.
exsr ExitPgm;
//====================================================================*
// MAINLINE-END *
//====================================================================*
//-------------------------------* Sub-Routine *
// ExitPgm() *---------------*
// Exit program. *
//-----------------------------------------------*
begsr ExitPgm;
*inlr = *on;
return;
endsr;
//-------------------------------* Sub-Routine *
// WriteFile() *---------------*
// Populate the file: *
//-----------------------------------------------*
begsr WriteFile;
for wNdx = 1 to 50; // For test only; rewrite for your needs.
exsr WriteLine;
endfor; // (Writes 50 Test records.)
endsr;
//-------------------------------* Sub-Routine *
// WriteLine() *---------------*
// Write records to the file. *
//-----------------------------------------------*
begsr WriteLine;
wMsg = // For test only; rewrite for your needs.
'"' + ' Test1-' + %trim(%editc(wNdx: 'Z')) + ' ",'
+ '"' + ' Test2-' + %trim(%editc(wNdx: 'Z')) + '",'
+ '"' + ' Test3-' + %trim(%editc(wNdx: 'Z')) + '",'
+ '"' + ' Test4-' + %trim(%editc(wNdx: 'Z')) + '",'
+ '"' + ' Test5-' + %trim(%editc(wNdx: 'Z')) + '",'
+ '"' + ' Test6-' + %trim(%editc(wNdx: 'Z')) + '",'
+ CR;
// Write a record.
callp Write(wFD: %addr(wMsg):
%len(%trim(wMsg)));
endsr;
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