[Bug 974584] Re: Semaphores cannot be created in lxc container

[Serge Hallyn]

There are a few parts to this.  At core, we need /dev/shm to be a
symbolic link to /dev/shm, which *is* mounted.

/etc/init/mounted-dev.conf is supposed to create that symbolic link.
However, it does not run because we never mount /dev.

If it did run, it would do the wrong thing.  That is because the
initscripts postinst leaves a /dev/shm directory.  mounted-dev.conf
simply does

[ -e /dev/shm ] || ln -s /run/shm /dev/shm

That would cause /dev/shm/shm to be the symbolic link to /run/shm.

The simplest solution is probably to rmdir $rootfs/dev/shm at the end of
the container creation templates.

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Title:
  Semaphores cannot be created in lxc container

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