Re: [PATCH] lxc: Bind mount container TTYs

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On Sun, Jun 28, 2015 at 09:46:43AM +0200, Richard Weinberger wrote:
Am 26.06.2015 um 15:09 schrieb Martin Kletzander:
On Tue, Jun 23, 2015 at 04:38:57PM +0200, Richard Weinberger wrote:
Instead of creating symlinks, bind mount the devices to
/dev/pts/XY.
Using bind mounts it is no longer needed to add pts devices
to files like /dev/securetty.


I guess you meant /etc/securetty.

Lol, yes. :-)

This patch makes sense, but if I start a container that I couldn't
login as a root into (because of securetty), it still doesn't help, I
still can't login.  Moreover, if I stop it and start it few times and
restart the daemon (I'm not sure whether that's needed, it's just that
I had to switch between gdb and non-gdb daemons and it happened only
sometimes), I get this:

 error: internal error: guest failed to start: unexpected exit status 125

The error in log is:

 libvirt:  error : failed to setup stdout file handle: Bad file descriptor

I briefly looked at it and *cmd->outfdptr has the value of 247083264
which is nowhere in the output of lsof for that process.  I know that
it doesn't sounds even remotely related, but without this patch that
doesn't happen.  Maybe it just uncovers some error rotting there for a
long time...

Hmm, very strange. What guest container are you using?
I tried with a Debian jessi and had user namespace enabled.


Sorry for the late reply.  I used simple one.  Only gentoo's stage 3
unpacked into a directory, no special settings used for it.  Removing
/etc/securetty works for me.  I'll give it another try, but probably
after the freeze.  If anyone else wants to review this, don't get
stopped by the problems I'm having!

Thanks,
//richard

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