Re: [gentoo-laptop] wireless and service dependencies

Re: [gentoo-laptop] wireless and service dependencies

[Master Control Program]

Will Briggs <will@burnieanglican.org.au> wrote on Sat Apr 14 10:32:59 EDT 2007
> Only problem I see with this is this:
> 
> 1) wireless (eth1) comes up - sshd (re)starts and all is well.
> 2) I ssh into the laptop from another machine
> 3) the cat-5 wire gets plugged in for some reason and eth0 comes up -
> sshd restarts
> 4) The connection I had in 2) is lost, even though the link isn't.
> 

/etc/init.d/sshd restart
will only restart the daemon, and not the sessions. 






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[gentoo-laptop] wireless and service dependencies

[Will Briggs]

G'day all,

I'm having this problem.  During startup both sshd and ntpd are not
started with a warning: "scheduled to start when net.eth0 is started"

eth0 is my wired network interface, eth1 is my wireless interface.

I rarely used a wired network, often use the wireless network.

This behaviour is fine, to certain extent, because if net.eth0 comes up
I'd be happy to have sshd and ntpd start.

However, I also want them to start if and when net.eth1 comes up.

I have searched for a dependency setting somewhere but can't find. Can
anyone point me in the right direction?

Cheers,

W.
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Re: [gentoo-laptop] wireless and service dependencies

[david]

Will Briggs wrote:
> G'day all,
>
> I'm having this problem.  During startup both sshd and ntpd are not
> started with a warning: "scheduled to start when net.eth0 is started"
>
> eth0 is my wired network interface, eth1 is my wireless interface.
>
> I rarely used a wired network, often use the wireless network.
>
> This behaviour is fine, to certain extent, because if net.eth0 comes up
> I'd be happy to have sshd and ntpd start.
>
> However, I also want them to start if and when net.eth1 comes up.
>
> I have searched for a dependency setting somewhere but can't find. Can
> anyone point me in the right direction?
>
> Cheers,
>
> W.
>   
Did you;
# ln -s net.lo /etc/init.d/net.eth1
# rc-update add net.eth1 default

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Re: [gentoo-laptop] wireless and service dependencies

[Will Briggs]

david wrote:
> Will Briggs wrote:
>> G'day all,
>>
>> I'm having this problem.  During startup both sshd and ntpd are not
>> started with a warning: "scheduled to start when net.eth0 is started"
>>
>> eth0 is my wired network interface, eth1 is my wireless interface.
>>
>> I rarely used a wired network, often use the wireless network.
>>
>> This behaviour is fine, to certain extent, because if net.eth0 comes up
>> I'd be happy to have sshd and ntpd start.
>>
>> However, I also want them to start if and when net.eth1 comes up.
>>
>> I have searched for a dependency setting somewhere but can't find. Can
>> anyone point me in the right direction?
>>
>> Cheers,
>>
>> W.
>>   
> Did you;
> # ln -s net.lo /etc/init.d/net.eth1

Yes. (Well, on checking it wasn't /etc/init.d/net.eth1 -> net.lo but
/etc/init.d/net.eth1 -> /etc/init.d/net.lo.  I've changed that but I
suspect it makes no difference having the path in the symlink)

> # rc-update add net.eth1 default
> 

No - but deliberately.  I think this may be where I, or the system is
confused.  Because unlike a desktop it's not just a matter of bringing
up the /etc/init.d/net.* scripts.  I don't want DHCP timeouts etc. when
booting off-line.

net.eth0 is brought up by netplug

net.eth1 is brought up by as I understand it, the ipw3945 module being
loaded which runs the ipw3945 daemon, which runs wpa_supplicant, which
runs the init script (maybe those last two steps are vice versa)

So, currently:
/etc/init.d/net.eth0 status
 * status:  inactive

(which is fine, the wire isn't plugged in)

/etc/init.d/net.eth1 status
 * status:  started

which is fine, but I want sshd and ntpd to have recognised this

In the end I want the services brought up when either or both of
net.eth0 or net.eth1 are started (by cables being plugged in or wireless
networks coming up etc.)

Thanks for the response,

W.




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Re: [gentoo-laptop] wireless and service dependencies

[Mike Benson]

On Fri, 13 Apr 2007, Will Briggs wrote:
> david wrote:
> > Will Briggs wrote:
> >> G'day all,
> >>
> >> I'm having this problem.  During startup both sshd and ntpd are not
> >> started with a warning: "scheduled to start when net.eth0 is started"

I get the same behaviour.
> >>
> >> eth0 is my wired network interface, eth1 is my wireless interface.
> >>
> >> I rarely used a wired network, often use the wireless network.

Life for the modern laptop at home :-) Same here.
> >>
> >> This behaviour is fine, to certain extent, because if net.eth0 comes up
> >> I'd be happy to have sshd and ntpd start.
> >>
> >> However, I also want them to start if and when net.eth1 comes up.

I have the same question!
> >>
> >> I have searched for a dependency setting somewhere but can't find. Can
> >> anyone point me in the right direction?
> >>
> >> Cheers,
> >>
> >> W.
> >
> > Did you;
> > # ln -s net.lo /etc/init.d/net.eth1
>
> Yes. (Well, on checking it wasn't /etc/init.d/net.eth1 -> net.lo but
> /etc/init.d/net.eth1 -> /etc/init.d/net.lo.  I've changed that but I
> suspect it makes no difference having the path in the symlink)

It makes no difference (assuming you were in /etc/init.d in the first place).
>
> > # rc-update add net.eth1 default
>
> No - but deliberately.  I think this may be where I, or the system is
> confused.  Because unlike a desktop it's not just a matter of bringing
> up the /etc/init.d/net.* scripts.  I don't want DHCP timeouts etc. when
> booting off-line.

Not only that, but there's some automagic code in the rc scripts that will try 
to bring the interfaces up without linking it to a soft runlevel. So 
actually, you're better off not doing it. 
>
> net.eth0 is brought up by netplug

Actually the message is that net.eth0 is invoking netplug to wait for eth0 in 
the background. I could never work out why that doesn't work with net.eth1.

>
> net.eth1 is brought up by as I understand it, the ipw3945 module being
> loaded which runs the ipw3945 daemon, which runs wpa_supplicant, which
> runs the init script (maybe those last two steps are vice versa)
>
> So, currently:
> /etc/init.d/net.eth0 status
>  * status:  inactive
>
> (which is fine, the wire isn't plugged in)
>
> /etc/init.d/net.eth1 status
>  * status:  started
>
> which is fine, but I want sshd and ntpd to have recognised this
>
> In the end I want the services brought up when either or both of
> net.eth0 or net.eth1 are started (by cables being plugged in or wireless
> networks coming up etc.)
>
> Thanks for the response,
>
> W.

I guess what we both actually want is for these network dependent services to 
come up when *any* external network interface is functional. But how?


Regards,

Mike
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Re: [gentoo-laptop] wireless and service dependencies

[Will Briggs]

Mike Benson wrote:
> 
> I guess what we both actually want is for these network dependent services to 
> come up when *any* external network interface is functional. But how?

Thanks for the clarification.  This is it exactly.

Here's some clue I guess:

grep -R "is scheduled to start" /etc/*
init.d/runscript.sh:                    ewarn "WARNING:  ${SVCNAME} is
scheduled to start when ${startinactive} has started."
init.d/runscript.sh:                            ewarn "WARNING:  ${x} is
scheduled to start when ${SVCNAME} has started."

but all that looks like it is doing is handling the dependencies - where
are they set?

W.

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Re: [gentoo-laptop] wireless and service dependencies

[Fabio A Correa]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello,

Study /etc/conf.d/net.example and write a postup() function in /etc/conf.d/net ; Postup is my
preferred way of starting sshd and ntpd, because my wireless network is managed by
wpa_supplicant. Then, when I move my laptop from an access point to another, such services must
be restarted. Nothing better than having Gentoo restarting such services for you.

Here goes an example:

postup () {
  /etc/init.d/ntpd restart
  /etc/init.d/sshd restart
  /etc.init.d/cupsd restart
}

For a more complicated example, including dhcp services on a per-AP basis, email me!

Good day.

Will Briggs wrote:
> G'day all,
> 
> I'm having this problem.  During startup both sshd and ntpd are not
> started with a warning: "scheduled to start when net.eth0 is started"
> 
> eth0 is my wired network interface, eth1 is my wireless interface.
> 
> I rarely used a wired network, often use the wireless network.
> 
> This behaviour is fine, to certain extent, because if net.eth0 comes up
> I'd be happy to have sshd and ntpd start.
> 
> However, I also want them to start if and when net.eth1 comes up.
> 
> I have searched for a dependency setting somewhere but can't find. Can
> anyone point me in the right direction?
> 
> Cheers,
> 
> W.


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Physics Dept, Universidad Nacional, Bogota, Colombia
facorread@gmail.com
ffaaccdd@yahoo.co.uk         facorread@unal.edu.co
My webpage and OpenPGP key at http://facorread.150m.com
facorread@alexandria.cc is not working anymore!!!
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Re: [gentoo-laptop] wireless and service dependencies

[Will Briggs]

Fabio A Correa wrote:
> Hello,
> 
> Study /etc/conf.d/net.example and write a postup() function in /etc/conf.d/net ; Postup is my
> preferred way of starting sshd and ntpd, because my wireless network is managed by
> wpa_supplicant. Then, when I move my laptop from an access point to another, such services must
> be restarted. Nothing better than having Gentoo restarting such services for you.
> 
> Here goes an example:
> 
> postup () {
>   /etc/init.d/ntpd restart
>   /etc/init.d/sshd restart
>   /etc.init.d/cupsd restart
> }

G'day Fabio,

Thanks for the post.  I'll have a play with this ASAP...

I guess the idea here is that you take /etc/init.d/foo out of the init
runlevels and let this postup function handle it - that way you don't
have any "WARNING: foo scheduled start..." messages on boot up.

So this would be a fix, but it doesn't actually attack the problem of
net.* service dependencies handled by runscript.sh, yes?

Only problem I see with this is this:

1) wireless (eth1) comes up - sshd (re)starts and all is well.
2) I ssh into the laptop from another machine
3) the cat-5 wire gets plugged in for some reason and eth0 comes up -
sshd restarts
4) The connection I had in 2) is lost, even though the link isn't.

Or have I got the wrong end of the stick here?
I'll have a play...

Thanks again,

W.
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Re: [gentoo-laptop] wireless and service dependencies

[YoYo Siska]

On Fri, Apr 13, 2007 at 08:19:20AM -0500, Fabio A Correa wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hello,
> 
> Study /etc/conf.d/net.example and write a postup() function in /etc/conf.d/net ; Postup is my
> preferred way of starting sshd and ntpd, because my wireless network is managed by
> wpa_supplicant. Then, when I move my laptop from an access point to another, such services must
> be restarted. Nothing better than having Gentoo restarting such services for you.
> 
> Here goes an example:
> 
> postup () {
>   /etc/init.d/ntpd restart
>   /etc/init.d/sshd restart
>   /etc.init.d/cupsd restart
> }
> 

...

> > 
> > This behaviour is fine, to certain extent, because if net.eth0 comes up
> > I'd be happy to have sshd and ntpd start.


Is there a specific reason why you have to restart sshd after you
restart/change network services? I don't know about ntpd and cupsd
because I start them only in some places, but I have sshd running all
the time (with RC_NET_STRICT_CHECKING="lo" in /etc/conf.d/rc) it works
correctly (it listens on 0.0.0.0 so any ip changes don't affect it).
I suppose cupsd and ntpd should be the same (well maybe they would have
to be configured to listen on 0.0.0.0, if they are listening on the ip
from an interface by default...)

yoyo


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Re: [gentoo-laptop] wireless and service dependencies

[Will Briggs]

YoYo Siska wrote:
> 
> Is there a specific reason why you have to restart sshd after you
> restart/change network services? I don't know about ntpd and cupsd
> because I start them only in some places, but I have sshd running all
> the time (with RC_NET_STRICT_CHECKING="lo" in /etc/conf.d/rc) it works
> correctly (it listens on 0.0.0.0 so any ip changes don't affect it).
> I suppose cupsd and ntpd should be the same (well maybe they would have
> to be configured to listen on 0.0.0.0, if they are listening on the ip
> from an interface by default...)
> 

Aaaah - that's where it is.  Thanks, this gives me the answer I need.
I'll still play with Fabio's tips though - but I think they are for a
more specific need.

W.
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