utils: fix lxc_mount_proc_if_needed()

- check for buffer overflow
- only call INFO() after we ensured that readlink() was successful
- simplify logic

Reported-by: Benedikt Rosenkranz beluro@web.de
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Add cronie to the pkg list

Add cronie to have crond running in the containers.
Signed-off-by: Marc Gariepy <gariepy.marc@gmail.com>

[lxc-top] Fix memory+swap output in batch mode

cgfsng: log when we defer to cgfsng

This is patch fix output of memory+swap in batch mode, that
was forgotten in 6b6e702a

Signed-off-by: Alexandr Nevenchanniy <a.nevenchannyy@gmail.com

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

[lxc-top] Add memory+swap monitoring

This is patch add memory + swap monitoring from lxc-top tool
Signed-off-by: Alexandr Nevenchanniy <a.nevenchannyy@gmail.com>

conf{,ile}: allow to clear all config items

start: pin rootfs when privileged

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

Seccomp: update comment, print action name etc

Closes #1561.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

This patch add function `get_action_name`, so we can print action name
in the log file. for example:

```
lxc-start ubuntu 20170515095416.561 INFO     lxc_seccomp - seccomp.c:parse_config_v2:613 - Adding compat rule for reject_force_umount action 0(kill).
lxc-start ubuntu 20170515095416.562 INFO     lxc_seccomp - seccomp.c:parse_config_v2:613 - Adding compat rule for kexec_load action 327681(errno).
```
Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

add more detail for blkio

monitor: delete unnecessary include file

we want to export `monitor.h`, `#include "conf.h"` will cause error
and it is unneccessory so just delete it.
Signed-off-by: 0x0916 <w@laoqinren.net>

This patch add Read and Write information for blkio bytes.
Signed-off-by: 0x0916 <w@laoqinren.net>

conf: fix build without libcap

Signed-off-by: Dima Krasner <samdima@securingsam.com>

lxc-attach: allow for situations without /dev/tty

utils: fix num parsing functions

start: don't call lxc_map_ids() without id map

So far, we somehow always called lxc_map_ids(), even when no id map was
configured. Let's not do this.

Closes #1555.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Closes #1552.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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

Suggested-by: Benedikt Rosenkranz beluro@web.de
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

start: add crucial details about lxc_spawn()

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

Install systemd units for CentOS

Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

utils: handle > 2^31 in lxc_unstack_mountpoint()

I mean.. really? But better safe than sorry.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

start: remove umount2() 

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