Newer libseccomp has a flag called SCMP_FLTATR_ATL_TSKIP which
allows syscall '-1' (nop) to be executed.  Without that flag,
debuggers cannot skip system calls inside containers.  For reference,
see the seccomp(2) manpage, which says:

	The tracer can skip the system call by changing the system call  number  to  -1.

and see the seccomp issue #80
Signed-off-by: Serge Hallyn <serge@hallyn.com>

cgfsng: make trim() safer

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

log: fix lxc_unix_epoch_to_utc()

The conversion algorithm used uses a clever trick by letting a year start at 1
March. So we need to add 1 for January and February.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

start: dumb down SIGCHLD from WARN() to NOTICE()

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

debian template: Allow to embed a SSH public key in the new container

squeeze is not a supported release anymore, drop the key

Signed-off-by: Evgeni Golov <evgeni@debian.org>

Fix issue with the clonehostname hook not working for overlayfs snapshot clones

Previously this hook did not work when cloning containers using an overlayfs snapshot as the LXC_ROOTFS_PATH didn't point to the actual filesystem that the container would see. LXC_ROOTFS_MOUNT should be used instead and in fact lxc.container.conf man page says that you usually would want to use the _MOUNT variant.
Signed-off-by: Matt Keeler <mjkeeler7@gmail.com>

c/r: only supply --ext-mount-map for bind mounts

lxc-download: Bump compat level to 4

For templates introduced after LXC 2.0 was released.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

Various fixes for Fedora bootstrapping on non-Fedora hosts

Signed-off-by: Reto Gantenbein <reto.gantenbein@linuxmonk.ch>

Signed-off-by: Reto Gantenbein <reto.gantenbein@linuxmonk.ch>

- Make sure mirror URL is queried for $FEDORA_RELEASE_DEFAULT
- Fix image path for URLs queried via mirror list
Signed-off-by: Reto Gantenbein <reto.gantenbein@linuxmonk.ch>

Signed-off-by: Reto Gantenbein <reto.gantenbein@linuxmonk.ch>

sabayon: Use /bin/bash

The script is full of bashisms making it break when run with a simple
POSIX shell.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

Complete rework of lxc-fedora template

The rest of the mounts can be restored normally.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>

fix seccomp blocking x32 guests on amd64 (userspace) hosts

Add HAVE_LIBCAP

Currently it is impossible to build lxc with --disable-capabilities if
the user has libcap-dev installed on his system as:
 - calls to cap_xxx functions are not protected by HAVE_LIBCAP defines.
 The whole file is only protected by HAVE_SYS_CAPABILITY_H.
 - AC_CHECK_LIB default action-if-found is overriden by [true] so
 HAVE_LIBCAP is never written to config.h

This patch replaces all HAVE_SYS_CAPABILITY_H checks by HAVE_LIBCAP
checks (fix #1361)
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

Without this patch, x32 guests (and no others) worked "natively" with x32
host lxc, but not on regular amd64 hosts.  That was especially problematic
as a number of ioctls such as those needed by netfilter don't work in such
scenarios, thus you want to run amd64 on the host.

With the patch, you can use all three ABIs: i386 x32 amd64 on amd64 hosts.

Despite x32 being little used, there's no reason to deny it by default:
the admin needs to compile their own kernel with CONFIG_X86_X32=y or (on
Debian) boot with syscall.x32=y.  If they've done so, it is a reasonable
assumption they want x32 guests.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>

lxc_setup_tios(): Ignore SIGTTOU and SIGTTIN signals

Make lxc-net return non-zero on failure

I found that even though the service lxc-net failed to start because I made some wrong configuration
settings the command exists zero.
So systemd reports the status of the service as good even though it failed:

    # service lxc-net status
    ● lxc-net.service - LXC network bridge setup
       Loaded: loaded (/lib/systemd/system/lxc-net.service; enabled)
       Active: active (exited) since Wed 2017-02-08 08:17:32 EST; 21min ago
      Process: 529 ExecStart=/usr/lib/x86_64-linux-gnu/lxc/lxc-net start (code=exited, status=0/SUCCESS)
     Main PID: 529 (code=exited, status=0/SUCCESS)
       CGroup: /system.slice/lxc-net.service

    Feb 08 08:17:30 dvm2 systemd[1]: Starting LXC network bridge setup...
    Feb 08 08:17:32 dvm2 lxc-net[529]: dnsmasq: failed to create listening socket for 10.2.2.1: Address already in use
    Feb 08 08:17:32 dvm2 lxc-net[529]: Failed to setup lxc-net.
    Feb 08 08:17:32 dvm2 systemd[1]: Started LXC network bridge setup.

Adding `exit 1` here makes it exit non-zero to make systemd recognize the failure.
Signed-off-by: Carsten Brandt <mail@cebe.cc>

Prevent an endless loop while executing lxc-attach in the background:

The kernel might fire SIGTTOU while an ioctl() in tcsetattr()
is executed. When the ioctl() is resumed and retries,
the signal handler interrupts it again.

We can't configure the TTY to stop sending
the signals in the first place since that
is a modification/write to the TTY already.

Still we clear the TOSTOP flag to prevent further signals.

Command to reproduce the hang:
----------------------------
cat > lxc_hang.sh << EOF
/usr/bin/timeout 5s /usr/bin/lxc-attach -n SOMECONTAINER -- /bin/true
EOF
sh lxc_hang.sh    # hangs
----------------------------
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>

This mainly affects the download of the bootstrap image when
running on a non-Fedora host and the initial download of the
repo and release RPMs. The container rootfs creation will then
be verified by dnf against the GPG signatures in the repos RPM.
Signed-off-by: Reto Gantenbein <reto.gantenbein@linuxmonk.ch>

Signed-off-by: Reto Gantenbein <reto.gantenbein@linuxmonk.ch>

confile: clear lxc.network.<n>.ipv{4,6} when empty

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

Signed-off-by: Baptiste Jonglez <git@bitsofnetworks.org>

conf/ile: make sure buffer is large enough

util: update setproctitle comments

Add LXC template script of Sabayon OS