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#1 (**permalink**) 01-05-2008, 11:54 AM

Hello,

I am writing a shell script to check installation pre-requisites.
Currently that shell script is able to get all important information
(hostname, memsize, /tmp free and stuff) but I am not able to tell, if
the script is executed unter WPAR or if there are WPAR available in
the system.

Best I can do is to list /wpars/*. In a WPAR you have a symlink to /
and outside you have a list if System Type WPARs. But this is not a
complete list (and it requres root also).

So has anybody an idea for a lswpar replacement which does not need
root. And alternatively one that is able to get the characteristics of
the Current WPAR.

Greetings
Bernd

#2 (**permalink**) 01-05-2008, 11:54 AM

bernd.eckenfels@googlemail.com wrote:
> Hello,
>
> I am writing a shell script to check installation pre-requisites.
> Currently that shell script is able to get all important information
> (hostname, memsize, /tmp free and stuff) but I am not able to tell, if
> the script is executed unter WPAR or if there are WPAR available in
> the system.
>
> Best I can do is to list /wpars/*. In a WPAR you have a symlink to /
> and outside you have a list if System Type WPARs. But this is not a
> complete list (and it requres root also).
>
> So has anybody an idea for a lswpar replacement which does not need
> root. And alternatively one that is able to get the characteristics of
> the Current WPAR.
>
> Greetings
> Bernd
>

Only a partial answer, but:
'uname -W' will tell you whether you are running
in a WPAR or in the global (base) system.
uname -W is 0 if in the global
uname -W is non-zero if in a WPAR

Paul Landay

#3 (**permalink**) 01-05-2008, 11:54 AM

On Nov 8, 1:35 pm, Paul Landay <lan...@attglobal.net> wrote:
> 'uname -W' will tell you whether you are running
> in a WPAR or in the global (base) system.
> uname -W is 0 if in the global
> uname -W is non-zero if in a WPAR

Thank you Paul, that is actually helpfull.

Just a side note: I did checked uname - but I was looking for WPAR,
and the comment reads:

# -W
# Displays the static workload partition identification
number. If
# the uname command runs in the Global environment, a value
of zero
# is displayed.

I still find it strange that root in a WPAR cannot see its own WPAR
params (without additional ACLs or privs).

Gruss
Bernd

#4 (**permalink**) 01-05-2008, 11:54 AM

bernd.eckenfels@googlemail.com wrote:
> On Nov 8, 1:35 pm, Paul Landay <lan...@attglobal.net> wrote:
>
>> 'uname -W' will tell you whether you are running
>> in a WPAR or in the global (base) system.
>> uname -W is 0 if in the global
>> uname -W is non-zero if in a WPAR
>
>
> Thank you Paul, that is actually helpfull.
>
> Just a side note: I did checked uname - but I was looking for WPAR,
> and the comment reads:
>
> # -W
> # Displays the static workload partition identification
> number. If
> # the uname command runs in the Global environment, a value
> of zero
> # is displayed.
>
> Gruss
> Bernd
>

Looks like you could also write a small program using
/usr/include/sys/wpar.h and make it setuid-root.
The AIX 6.1 pubs are online at:
http://publib.boulder.ibm.com/infoce...v6r1/index.jsp
Search there for 'wpar.h', which will then lead to this:
http://publib.boulder.ibm.com/infoce...r_get_info.htm
I haven't actually tried using lpar_get_info() but
it looks promising.

Another suggestion:
Doing a 'truss lswpar' showed that it was looking at
the /etc/corrals/index file. From what I can see:
- if /etc/corrals/index exists and 'uname -W' = 0
then you are on the global and there are wpars defined
and you can open up /etc/corrals/index to see the
wpar names.
- if /etc/corrals/index does not exist and 'uname -W' = 0
then you are on the global and there are no wpars defined.
- if /etc/corrals/index does not exist and 'uname -W' != 0
then you are running within a wpar.

Paul Landay

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lswpar alternative?