Merge git://github.com/lxc/lxc

Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
change version to 1.0.0.alpha1 in configure.ac

Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Add Japanese man pages.

Japanese man pages is installed under $mandir/ja.
At this time, it is based on version 0.9.0.
Fixed opensuse template to make lxc-shutdown work.

The fix is described by:
https://wiki.archlinux.org/index.php/Linux_Containers#Container_cannot_be_shutdown_if_using_systemd

Signed-off-by: Cedric Bosdonnat <cbosdonnat@suse.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
API support for container snapshots (v2)

The api allows for creating, listing, and restoring of container
snapshots.  Snapshots are created as snapshot clones of the
original container - i.e. btrfs and lvm will be done as snapshot,
a directory-backed container will have overlayfs snapshots.  A
restore is a copy-clone, using the same backing store as the
original container had.

Changelog:

 . remove lxcapi_snap_open, which wasn't defined anyway.
 . rename get_comment to get_commentpath
 . if no newname is specified at restore, use c->name (as we meant to)
   rather than segving.
 . when choosing a snapshot index, use the correct path to check for.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
introduce lxc-snapshot

Hopefully someone else will come in and spruce it up :)  This
version is as simple as can be

lxc-snapshot -n a1
	create a snapshot of a1
echo "second commit" > /tmp/a
lxc-snapshot -n a1 -c /tmp/a
	create a snapshot of a1 with /tmp/a as a commit comment
lxc-snapshot -n a1 -L
	list a1's snapshots
lxc-snapshot -n a1 -L -C
	list a1's snapshots along with commit comments
lxc-snapshot -n a1 -r snap0 a2
	restore snapshot 0 of a1 as container a2

Some easy nice-to-haves:

1. sort snapshots in the list
2. allow a comment to be given in-line
3. an option to remove a snapshot?

Removing a snapshot can just as well be done with

	lxc-destroy -P /var/lib/lxcsnaps/c1 -n snap2

so I leave it to others to decide whether they really want
it, and provide the patch if so.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
error.c: don't return error if container init signaled

We log that at INFO level in case it is needed.  However, in a modern
kernel a container which was shut down using 'shutdown' will always
have been signaled with SIGINT.  Making lxc-start return an error to
reflect that seems overkill.

It's *conceivable* that someone is depending on this behavior, so I'm
sending this out for anyone to NACK, but if I hear no complaints I'll
apply.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
global config: Unify parsing, add additional checks

Instead of duplicating the code for parsing the global config file for
each option, write one main function, lxc_global_config_value, that
does the parsing for an arbitrary option name and just call that
function from the existing ones.

Signed-off-by: Christian Seiler <christian@iwakd.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Add cgroup.pattern global configuration option

Signed-off-by: Christian Seiler <christian@iwakd.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Add fopen_cloexec function to emulate 'e' mode

Newer glibc versions (that we can't require) allow for an additional
letter 'e' in the fopen mode that will cause the file to be opened with
the O_CLOEXEC flag, so that it will be closed if the program exec()s
away. This is important because if liblxc is used in a multithreaded
program, another thread might want to run a program. This options
prevents the leakage of file descriptors from LXC. This patch adds an
emulation for that that uses the open(2) syscall and fdopen(3). At some
later point in time, it may be dropped against fopen(..., "...e").

This commit also converts all fopen() calls in utils.c (where the
function is added) to fopen_cloexec(). Subsequently, other calls to
fopen() and open() should also be adapted.

Signed-off-by: Christian Seiler <christian@iwakd.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
fopen_cloexec: simplify open call

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
utils: Add string and array utility functions

Adds a few useful string and array manipulation functions to utils.[ch]

Signed-off-by: Christian Seiler <christian@iwakd.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
utils: Add utility functions that write/read to entire files

Signed-off-by: Christian Seiler <christian@iwakd.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
remove unused lxc_read_line_from_file()

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
cgroup: Major rewrite of cgroup logic

This patch rewrites most of the cgroup logic. It creates a set of data
structures to store the kernel state of the cgroup hierarchies and
their mountpoints.

Mainly, everything is now grouped with respect to the hierarchies of
the system. Multiple controllers may be mounted together or separately
to different hierarchies, the data structures reflect this.

Each hierarchy may have multiple mount points (that were created
previously using the bind mount method) and each of these mount points
may point to a different prefix inside the cgroup tree. The current
code does not make any assumptions regarding the mount points, it just
parses /proc/self/mountinfo to acquire the relevant information.

The only requirement is that the current cgroup of either init (if
cgroup.pattern starts with '/' and the tools are executed as root) or
the current process (otherwise) are accessible. The root cgroup need
not be accessible.

The configuration option cgroup.pattern is introduced. For
root-executed containers, it specifies which format the cgroups should
be in. Example values may include '/lxc/%n', 'lxc/%n', '%n' or
'/machine/%n.lxc'. Any occurrence of '%n' is replaced with the name of
the container (and if clashes occur in any hierarchy, -1, -2, etc. are
appended globally). If the pattern starts with /, new containers'
cgroups will be located relative to init's cgroup; if it doesn't, they
will be located relative to the current process's cgroup.

Some changes to the cgroup.h API have been done to make it more
consistent, both with respect to naming and with respect to the
parameters. This causes some changes in other parts of the code that
are included in the patch.

There has been some testing of this functionality, but there are
probably still quite a few bugs in there, especially for people with
different configurations.

Signed-off-by: Christian Seiler <christian@iwakd.de>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
don't use cgroup_path_components un-initialized

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
lxc_cgroup_process_info_free_and_remove should recursively call itself

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>