nsswitch.conf ... changed policy at 11i

[Charles Keenan]

I think I have detected a change in the Name Service Switch policy, but can't find any documentation to suuport my theory. I have a system at 11.0 whose policy = SUCCESS=return NOTFOUND=return UNAVAIL=continue TRYAGAIN=return
Whereas my 11i(11.11) has the policy
SUCCESS=return NOTFOUND=continue UNAVAIL=continue TRYAGAIN=continue
neither system has a nsswitch.conf file. Interestingly the 11.0 manual page states it should be RCCC but it blatantly isn't ... Who is right ???

[harry d brown jr]

RCCC is correct, well it's what I would and DO use.

If it continues to be confusing, then explicitly state your desired results by creating the nsswitch.conf file. Basically, don't leave things to chance!


live free or die
harry

[Pete Randall]

I'm curious (and maybe a little slow) - if you don't have an nsswitch.conf file, how are you viewing the RRCR behavior?

Pete

[Jean-Louis Phelix]

Charles,

As you mentionned, switch policy has changed but it should be the same for 11.00 and 11i and different for 10.20

On 10.20 it is RRCR (man 4 switch), after it is RCCC (man nsswitch.conf). A problem that I have seen is that if a system doesn't have any nsswitch.conf file, then the default policy is 'harcoded' in some functions. So, on the same system without a nsswitch.conf file, if a binary has been compiled with libc.1 (from 10.20) it will use RRCR, if it has been compiled with libc.2 (from 11.x) it will use RCCC. You can check it using chatr on the binary.

Don't think it's a minor detail because if you use chatr on /usr/sbin/swlist on a 11i for example, you will see libc.1 ...

So as Harry said "don't leave things to chance!" and use your own nsswitch.conf ...

Regards,

Jean-Louis.

[Charles Keenan]

Im reviewing the policy y using nslookup

# nslookup
> policy
#Lookups = 3
dns[RRCR] nis[RRCR] files[RRRR]

... does anyone no - FOR DEFINITE - that this changed in 11i, it's just I work for/with HP customers and they are asking "where's the documentation for this change???" ... mucho-ta

[Pete Randall]

Thanks, Charles, I learned something new (or that I should have already known) today.

Pete

[Pete Randall]

Charles,

Here's the info from 2 of my systems (one 11.0, one 11.11):

# uname -r
B.11.00
# nslookup
Using /etc/hosts on: yukon

> policy
#Lookups = 3
files [RCCC] dns [RCCR] nis [RRRR]
> exit


$ uname -r
B.11.11
$ nslookup
Using /etc/hosts on: tsws1

> policy
#Lookups = 3
files [RCCC] dns [RCCR] nis [RRRR]
> exit
$

They look the same to me.

Pete

[Pete Randall]

Disregard, Charles. Since I'm using nsswitch, it's like comparing apples and kumquats. Sorry.

Pete