The UNLINK API can be used from RPG IV to remove files from the IFS. The IFS is the stream file system of the IBM i operating system.
The following example illustrates unlink() (line 27) being used in an RPG IV program. Note that control statements in this example allow it to be compiled at any release level of the IBM i operating system.
Note that the field containing the IFS file name is VARYING (line 20). As of v5r3 this is no longer necessary if the *TRIM option is included on IFS-based prototypes (line 12).
..... /IF DEFINED(*V6R1M0) H MAIN(DLTIFS) /ELSE H BNDDIR('QC2LE') /ENDIF H DFTACTGRP(*NO) BNDDIR('RPGOPEN/RPGOPEN') /INCLUDE rpgopen/qcpysrc,joblog D DLTIFS PR EXTPGM('DLTIFS') D unlink PR 10I 0 extProc('unlink') D ifsFile * VALUE OPTIONS(*STRING:*TRIM) /IF DEFINED(*V6R1M0) P dltIFS B /endif D dltIFS PI D oldFile S 640A Varying /IF NOT DEFINED(*V6R1M0) C EVAL *INLR = *ON /ENDIF /free oldFile = '/userfile/mystuff/sales.xls'; if ( unlink( oldFile ) = -1); joblog('Delete of %s failed.':%trimR(oldFile)); else; joblog('File %s deleted.':%trimR(oldFile)); endif; /end-free /IF DEFINED(*V6R1M0) P dltIFS E /endif