Can't run mingetty with runsvdir?

Can't run mingetty with runsvdir?

[Lars Kellogg-Stedman]

I'm trying to replace the mingetty calls in /etc/inittab with
runit-controlled services.  The inittab entries look like this:

  1:2345:respawn:/sbin/mingetty tty1

I've create a run script for runsv that looks like this:

  #!/bin/sh
  exec mingetty tty1

Unfortunately, this fails with the following error logged in syslog:

  auth.err: Feb 20 12:44:42 mingetty[5609]: tty1: no controlling tty:
  Operation not permitted

Using strace shows that the "Operating not permitted" error is due to a
failed ioctl() call.

  ioctl(3, TIOCSCTTY) = -1 EPERM (Operation not permitted)

According to what little documentation I can find out there, TIOCSCTTY
returns EPERM "If this tty is already the controlling tty  of  a  different
session  group."  But nothing else has tty1 open.

I'm running this service via runsvdir, which itself is started from
/etc/inittab via the following:

  ri:2345:respawn:/sbin/runsvdir /etc/runit/active-services

This is all happening in a Linux 2.6 environment.  Anyone have this
working?  I replaced mingetty with agetty for the time being, which appears
to work, but I'm curious what's making mingetty choke.

-- Lars

-- 
Lars Kellogg-Stedman <lars@oddbit.com>

Re: Can't run mingetty with runsvdir?

[Vincent Danen]

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On Feb 20, 2005, at 11:21, Lars Kellogg-Stedman wrote:

> I'm trying to replace the mingetty calls in /etc/inittab with
> runit-controlled services.  The inittab entries look like this:
>
>   1:2345:respawn:/sbin/mingetty tty1
>
> I've create a run script for runsv that looks like this:
>
>   #!/bin/sh
>   exec mingetty tty1
>
> Unfortunately, this fails with the following error logged in syslog:
>
>   auth.err: Feb 20 12:44:42 mingetty[5609]: tty1: no controlling tty:
>   Operation not permitted
>
> Using strace shows that the "Operating not permitted" error is due to a
> failed ioctl() call.
>
>   ioctl(3, TIOCSCTTY) = -1 EPERM (Operation not permitted)
>
> According to what little documentation I can find out there, TIOCSCTTY
> returns EPERM "If this tty is already the controlling tty  of  a  
> different
> session  group."  But nothing else has tty1 open.
>
> I'm running this service via runsvdir, which itself is started from
> /etc/inittab via the following:
>
>   ri:2345:respawn:/sbin/runsvdir /etc/runit/active-services
>
> This is all happening in a Linux 2.6 environment.  Anyone have this
> working?  I replaced mingetty with agetty for the time being, which 
> appears
> to work, but I'm curious what's making mingetty choke.

This is what I'm using here and it works great:

[vdanen@titan vdanen]$ cat /service/mingetty-tty1/run
#!/bin/sh
chpst -P /sbin/mingetty --noclear tty1


However, note that I don't use init at all (I suspect you'll need to 
completely remove those mingetty lines from inittab).  I use runit as 
init.  I have 6 tty's setup this way (only tty1 has the --noclear 
option just so we don't wipe out boot information).

Hope that helps a bit.

FWIW, the Annvix CVS repository has a lot of run scripts tucked away 
for services that, for the most part (with openldap being somewhat 
problematic) work great for a number of serivces we use.  Anyone is 
free to poke through the CVS for our runscripts.

http://annvix.org/cgi-bin/viewcvs.cgi/packages/

All daemons are run under supervise except for autofs (still need to 
get around to that or switch to amd).  Could be useful to some folks (I 
know someone was having issues with nfs on the list... if they go to 
the CVS and look in the nfs-utils package, they can see the two 
runscripts we use to handle nfs services which seem to work pretty good 
over here).

-- 
Annvix - Secure Linux Server: http://annvix.org/
"lynx -source http://linsec.ca/vdanen.asc | gpg --import"
{FEE30AD4 : 7F6C A60C 06C2 4811 FA1C  A2BC 2EBC 5E32 FEE3 0AD4}

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Re: Can't run mingetty with runsvdir?

[Lars Kellogg-Stedman]

> chpst -P /sbin/mingetty --noclear tty1

Alas, even with 'chpst -P' the behavior is for the same, even for ttys
which have not previously had any sort of getty running on them.

> FWIW, the Annvix CVS repository has a lot of run scripts tucked away for
> services that, for the most part ... work great for a number of serivces
> we use.  Anyone is free to poke through the CVS for our runscripts.

Thanks for the pointer; I'll take a look.

-- Lars

-- 
Lars Kellogg-Stedman <lars@oddbit.com>

Re: Can't run mingetty with runsvdir?

[Charlie Brady]

On Mon, 21 Feb 2005, Lars Kellogg-Stedman wrote:

> > chpst -P /sbin/mingetty --noclear tty1
> 
> Alas, even with 'chpst -P' the behavior is for the same, even for ttys
> which have not previously had any sort of getty running on them.

If you are using linux, try this:

chpst -P /usr/bin/openvt -c 1 -w /sbin/mingetty --noclear tty1

Re: Can't run mingetty with runsvdir?

[Lars Kellogg-Stedman]

> chpst -P /usr/bin/openvt -c 1 -w /sbin/mingetty --noclear tty1

I had to add '-f' to force it, but this finally worked:

  chpst -P /usr/bin/openvt -c 1 -w -f -- /sbin/mingetty --noclear tty1

Still not sure why...the call trace for mingetty by itself and
mingetty run via openvt is remarkably similar.  I'm using agetty now, which
requires fewer hoops to jump through, so I'll probably stick with it for
the time being.

-- Lars

-- 
Lars Kellogg-Stedman <lars@oddbit.com>