webadmin-devel

webmin rpm and chkconfig...

[<jam...@te...>]

Hi Jamie,

I am trying to build a trimmed down RPM of webmin for our internal purposes
and came across
what I believe is a discrepency (or maybe its not).    In the webmin init
script you have the following
comments:

     # chkconfig: 235 99 00
     # description: Start or stop the Webmin server

Which of course are for the chkconfig program.  What I find strange is that
your RPM's specfile does
not use the chkconfig command to setup the sybolic links for the init
script but instead do these
as files that are part of the package.  Furthermore in the spec file  you
are setting the init scripts
links to have it run at different priority (or order) than you have in your
chkconfig entry in the
init script:

     /etc/rc.d/rc2.d/S99webmin
     /etc/rc.d/rc3.d/S99webmin
     /etc/rc.d/rc5.d/S99webmin
     /etc/rc.d/rc2.d/K10webmin
     /etc/rc.d/rc3.d/K10webmin
     /etc/rc.d/rc5.d/K10webmin

Furthermore, and I just noticed this, you have kill scripts in the same run
      level as your start scripts.

So my questions are:

      - Which priorities do you consider correct (I am assuming the links
      in the spec file, but
         I figure I would ask)?
      - Why don't you use chkconfig?  I will most definately alter the
      package for my
        purposes to use it, but I was wondering if you had a reason?
      - Did you really mean to have kill and start scripts in the same run
      level?  I thought the
         kill scripts belonged in the run levels where you don't want
      webmin to run, such
         as 0, 1, and 6.

Cheers...james

Re: webmin rpm and chkconfig...

[Jamie C. <jca...@we...>]

jam...@te... wrote:

> Hi Jamie,
> 
> I am trying to build a trimmed down RPM of webmin for our internal purposes
> and came across
> what I believe is a discrepency (or maybe its not).    In the webmin init
> script you have the following
> comments:
> 
>      # chkconfig: 235 99 00
>      # description: Start or stop the Webmin server
> 
> Which of course are for the chkconfig program.  What I find strange is that
> your RPM's specfile does
> not use the chkconfig command to setup the sybolic links for the init
> script but instead do these
> as files that are part of the package.  Furthermore in the spec file  you
> are setting the init scripts
> links to have it run at different priority (or order) than you have in your
> chkconfig entry in the
> init script:
> 
>      /etc/rc.d/rc2.d/S99webmin
>      /etc/rc.d/rc3.d/S99webmin
>      /etc/rc.d/rc5.d/S99webmin
>      /etc/rc.d/rc2.d/K10webmin
>      /etc/rc.d/rc3.d/K10webmin
>      /etc/rc.d/rc5.d/K10webmin
> 
> Furthermore, and I just noticed this, you have kill scripts in the same run
>       level as your start scripts.
> 
> So my questions are:
> 
>       - Which priorities do you consider correct (I am assuming the links
>       in the spec file, but
>          I figure I would ask)?


The links in the spec file are the correct priorities.. I will fix the init
script to match them.


>       - Why don't you use chkconfig?  I will most definately alter the
>       package for my
>         purposes to use it, but I was wondering if you had a reason?


Just because it is not always available. It seems to be a redhat-specific thing,
so I didn't want to depend upon its existance.


>       - Did you really mean to have kill and start scripts in the same run
>       level?  I thought the
>          kill scripts belonged in the run levels where you don't want
>       webmin to run, such
>          as 0, 1, and 6.


To be honest, I'm not really sure about that! Aren't the K scripts for a runlevel
run when leaving it? So if you booted to runlevel 5, S99webmin would be run at boot time..
When shutting down (and so leaving runlevel 5) K10webmin would be run.

Correct me if I am wrong in my understanding of how init scripts work on shutdown though.

  - Jamie

Re: webmin rpm and chkconfig...

[Joe C. <jo...@sw...>]

Jamie Cameron wrote:
> jam...@te... wrote:
> 
>>       - Did you really mean to have kill and start scripts in the same 
>> run
>>       level?  I thought the
>>          kill scripts belonged in the run levels where you don't want
>>       webmin to run, such
>>          as 0, 1, and 6.
> 
> 
> 
> To be honest, I'm not really sure about that! Aren't the K scripts for a 
> runlevel
> run when leaving it? So if you booted to runlevel 5, S99webmin would be 
> run at boot time..
> When shutting down (and so leaving runlevel 5) K10webmin would be run.
> 
> Correct me if I am wrong in my understanding of how init scripts work on 
> shutdown though.

My understanding was the same as James.  My impression was that the kill 
scripts run as you switch into a runlevel.  Thus rc6.d contains a ton of 
K scripts and only two S scripts (S00killall and S01reboot) and rc0.d is 
the same except S01halt replaces S01reboot.

telinit <somelevel> should prove it quickly...I'm not at a machine I can 
do a runlevel change on at the moment, but I reckon James is right.

This is one of those simple things that I rarely dig into though.  It 
just works, so why bother understanding it?  ;-)

Anyway, in my RPMs I've gone under the assumption that you start it in 
runlevels where you want it to run and kill it in levels where you don't 
(thus network gets killed in level 1..actually everything gets killed 
there except S00single).  I may be wrong, but it seems to work.  Then 
again, so does Webmin!  ;-)
-- 
Joe Cooper <jo...@sw...>
Web caching appliances and support.
http://www.swelltech.com

Re: webmin rpm and chkconfig...

[Jamie C. <jca...@we...>]

Joe Cooper wrote:

> Jamie Cameron wrote:
> 
>> jam...@te... wrote:
>>
>>>       - Did you really mean to have kill and start scripts in the 
>>> same run
>>>       level?  I thought the
>>>          kill scripts belonged in the run levels where you don't want
>>>       webmin to run, such
>>>          as 0, 1, and 6.
>>
>>
>>
>>
>> To be honest, I'm not really sure about that! Aren't the K scripts for 
>> a runlevel
>> run when leaving it? So if you booted to runlevel 5, S99webmin would 
>> be run at boot time..
>> When shutting down (and so leaving runlevel 5) K10webmin would be run.
>>
>> Correct me if I am wrong in my understanding of how init scripts work 
>> on shutdown though.
> 
> 
> My understanding was the same as James.  My impression was that the kill 
> scripts run as you switch into a runlevel.  Thus rc6.d contains a ton of 
> K scripts and only two S scripts (S00killall and S01reboot) and rc0.d is 
> the same except S01halt replaces S01reboot.
> 
> telinit <somelevel> should prove it quickly...I'm not at a machine I can 
> do a runlevel change on at the moment, but I reckon James is right.
> 
> This is one of those simple things that I rarely dig into though.  It 
> just works, so why bother understanding it?  ;-)
> 
> Anyway, in my RPMs I've gone under the assumption that you start it in 
> runlevels where you want it to run and kill it in levels where you don't 
> (thus network gets killed in level 1..actually everything gets killed 
> there except S00single).  I may be wrong, but it seems to work.  Then 
> again, so does Webmin!  ;-)

Looks like you are right .. all the other init scripts on my system have
their S links in rc3.d, rc4.d and rc5.d , and their K links in rc0.d , rc1.d
and rc6.d . So I'll make the Webmin RPM do the same thing ..

  - Jamie