[Bug 863629] Re: libvirt-lxc: virFileOpenTtyAt can't be called on /some/other/dev/pts

[Serge Hallyn]

Thanks, Scott.  I can now finally reproduce this :)  I see you were
right on irc, my debdiff does not suffice.  fascinating.

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https://bugs.launchpad.net/bugs/863629

Title:
  libvirt-lxc: virFileOpenTtyAt can't be called on /some/other/dev/pts

Status in “libvirt” package in Ubuntu:
  Confirmed

Bug description:
  lxcControllerRun() is calling virFileOpenTtyAt() with a slave opened
  on /the/container/chroot/dev/pts.  While it is not documented in the
  manpages, glibc's grantpt does a first check (ensuring that the passed
  in fd is a pty slave) with '/dev/pts' as the hardcoded path, appending
  the pty#.

  lxcControllerRun always calls this on the first slave opened after
  creating the new /dev/pts, so grantpt is always checking /dev/pts/0.
  Therefore, if your host does not have /dev/pts/0 (easy to reproduce
  using screen), then grantpt will fail, and the container creation will
  subsequently also fail.

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