The Remove  System  Library List  Entry command  allows a  user job  to
remove a  library from the system  portion of the library  list for the
current  job.   The only  libraries that  are valid  to be  removed are
those that the Security  Officer has identified in the  RMVSYSLIBE data
area  in  TAASECURE.   The  data  area  is  shipped with  no  libraries
specified.   The  data area  should be updated  with the  EDTCONARR TAA
command.

Assume the  Security  Officer has  specified  LIB32 in  the  RMVSYSLIBE
data area  and that  it exists  on the  system portion  of the  library
list.  The following command removes LIB32:

          RMVSYSLIBE    LIB(LIB32)

The  intent of  RMVSYSLIBE is  to  allow the  placement of  an optional
library on the system  portion of the library  list.  Users can  remove
the library if  they do not need it  or it causes conflicts  with other
functions that appear in libraries lower in the library list.

System library list
-------------------

The system portion  of the library list can  be changed by changing the
system value QSYSLIBL.  This only impacts new jobs.

The  system command CHGSYSLIBL can be used  to change the list during a
job, but  this is a  very security sensitive  function.  CHGSYSLIBL  is
shipped by  the system so that it  is only authorized to  QSECOFR.  The
command should not be made public.

CHGSYSLIBL  allows any library to  be added or removed  from the system
portion of the  library list.   Not only  can the improper  use of  the
command cause  application problems, but  improper use can  also impact
the security and integrity of the system.

When a  library is added to the system portion  of the library list, it
is  always  placed  in  front  of  QSYS.    This  can  be  a  cause  of
significant security and integrity considerations.

If you  have  a library  that you  want to  be optional  on the  system
portion  of  the  library   list,  authorizing  a  user  to  CHGSYSLIBL
probably  provides a method of removing  it, but at a considerable loss
of control.

The tool RMVSYSLIBE allows you  to have an optional library  that users
can remove without giving up control.

The  user does  not have  to be  authorized to  the  CHGSYSLIBL command
(the CPP adopts the QSECOFR profile).

Other comments
--------------

Although  RMVSYSLIBE is  available  for *PUBLIC  use, the  command does
not cause any function  to occur unless  the Security Officer takes  an
overt action to describe the library in the RMVSYSLIBE data area.

QSYS can never be removed.

There is no  corresponding function to place the  optional library back
on  the system  portion of the  library list  so that it  appears after
QSYS.

If you need to add the library  back to the library list, consider  the
use of the CHGPRDLIB TAA tool.

Command parameters                                    *CMD
------------------

   LIB           The library to be removed.

Restrictions
------------

QSYS can never be removed.

Prerequisites
-------------

The following TAA Tools must be on your system:

     CONARR          Constant array

Implementation
--------------

The tool  is ready  to use,  but any  libraries to be  removed must  be
specified  in  the  RMVSYSLIBE   data  area  in  TAASECURE.    Use  the
following command:

          EDTCONARR    DTAARA(TAASECURE/RMVSYSLIBE)

Objects used by the tool
------------------------

   Object        Type    Attribute      Src member    Src file
   ------        ----    ---------      ----------    ----------

   RMVSYSLIBE    *CMD                   TAALIBQ       QATTCMD
   TAALIBQC      *PGM       CLP         TAALIBQC      QATTCL