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SI37545 - OSP /dev/urandom support

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

OSP /dev/urandom support


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
PRE  5761SS1  610  SI37099   00/00    0000
CO   5761SS1  610  SI37538   00/00    0000
DIST 5761999  610  MF48661   00/00    0000
DIST 5761999  611  MF48662   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the license agreement which
accompanied, or was contained in, the Program for which you are obtaining
the PTF.  You are not authorized to install or use the PTF except as part
of a Program for which you have a valid Proof of Entitlement.

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CL command.





APAR Error Description / Circumvention

-----------------------------------------------
Add character special file /dev/urandom to support generation of
random data.

CORRECTION FOR APAR SE40624 :
-----------------------------
Activating this PTF creates the /dev/urandom character special
file.  See the special instructions for more information.

CIRCUMVENTION FOR APAR SE40624 :
--------------------------------
None


Activation Instructions


This PTF contains objects that are activated only at IPL time.
Therefore, if this PTF is applied as an immediate PTF, you must
perform an IPL of the system to activate the PTF. Applying the
PTF as an immediate PTF will ensure that the PTF becomes active
even after an abnormal IPL where delayed PTFs are not applied.

If the PTF is applied as a delayed PTF, no further action is
necessary.





Special Instructions


The /dev/urandom special file is a non-blocking source of random
data similar to this same special file found on other platforms.
In the IBM i implementation, reads from /dev/urandom will use the
Generate Pseudorandom Numbers (Qc3GenPrns) API as the source of
random data.  Writes to /dev/urandom will use the Add Seed for
Pseudorandom Number Generator (Qc3AddPRNGSeed) API to seed the
random numbers returned by /dev/urandom as well as Qc3GenPrns.

Reading from /dev/urandom does not require any special authority.
Writing to /dev/urandom requires *ALLOBJ special authority.

Additional information regarding /dev/urandom can be found in the
AIX Information Center here:
http://publib.boulder.ibm.com/infocenter/aix/v6r1/topic/com.ibm.aix.fil
es/doc/aixfiles/urandom.htm


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   SI35242      OSP-WAIT NESTED NFS LOOPBACK MOUNTS HANG ON UNMOUNT
   SI34968      OSP Internal extensions
   SI34858      OSP-MSGCPFA09E UNMOUNTING UDFS
   SI32537      OSP INTERNAL EXTENSIONS

Summary Information

System..............................i
Models..............................
Release.............................V6R1M0
Licensed Program...............5761SS1
APAR Fixed..........................SE40624
Superseded by:......................View fix details for PTF SI49330
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C0215610


System i Support

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Document Information

Modified date:
19 February 2010