[CRIU] [PATCH 5/6] tty: Restore orphan slavery peers

[Cyrill Gorcunov]

In case if there is no master peer associated
with a slave peer we have two cases

 - the master peer was closed before slave
 - we just have no master peer at all, but
   only slave one

In first case we just create a fake master peer
and connect slaves on it.

The second case is a bit more complex. Because
we have no master peer -- it means the slaves
are connected to some external master peer which
doesn't belong us. In a sake of security in such
case a user must provide "--ext-tty" option on
restore granting the program to connect to existing
external master peer.

Suggested-by: Andrey Vagin <avagin at openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 cr-restore.c      |    4 +
 crtools.c         |    4 +
 include/crtools.h |    1 +
 include/tty.h     |    1 +
 tty.c             |  165 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 5 files changed, 169 insertions(+), 6 deletions(-)

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