Change alpine template file check to also check file size (`-f` => `-s`)

tests: Support systemd hybrid cgroups

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

Because the `fetch` wget wrapper outputs files to stdout we may end up in a
situation where wget fails but the files are still created. This can happen
e.g. when the host date is out of sync leading to a failed certificate
check, resulting in the creation of empty key files.

Once the empty files have been created the template will try to use them which
causes the certificate check to fail.

By using `-s` instead of `-f` the template will re-fetch the files unless they
exist AND have a size greater than zero.
Signed-off-by: Rune Juhl Jacobsen <runejuhl@petardo.dk>

plamo: Delete unnecessary process during container shutdown

start: pass LXC_LOG_LEVEL to hooks

- rework and fix pipe fd leak
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

start: set environment variables correctly

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

start: move env setup before container setup

The hooks (e.g. lxc.hook.mount) should have the environment variables the user
gave us available.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

[TRIVIAL] fix regex-typo in documentation example

To match names beginning with the letters "f" or "b" one can use
the regular expression "[fb].*" or "(f|b).*", but not "[f|b].*",
which would match strings beginning with "f", "|", or "b".
Signed-off-by: Christian von Roques <roques@z12.ch>

Since some remounts/umounts is executed in the plamo shutdown script,
the filesystem on where a container exists might be mount as
read-only. This patch delete some mounts and umounts from the shutdown
script. It also delete hwclock setting process.

And delete an unncecessary output.
Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>

start: switch ids at last possible instance

When the "lxc.rootfs.path" property is not set and users request a container
copy we would segfault since strstr() would be called on a NULL pointer.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

This is technically not necessary but it is a privilege sensitive operation.
Meaning if anyone wants to do something that requires privilege it should be
done before the id switch. So let's move the id switch immediately before the
exec so that it's called at the last possible moment.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

conf: add userns_exec_full()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Users were confused when the config file created during cloning or copying a
container suddenly missed all newlines. Let's keep them.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Closes #1802.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

non-functional changes
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

non-functional changes
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

non-functional changes
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Closes #1800.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Closes #1800.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>