tree-wide: sort includes Sort the includes accoding to the new coding style.

Remove snapshot unit type Snapshots were never useful or used for anything. Many systemd developers that I spoke to at systemd.conf2015, didn't even know they existed, so it is fairly safe to assume that this type can be deleted without harm. The fundamental problem with snapshots is that the state of the system is dynamic, devices come and go, users log in and out, timers fire... and restoring all units to some state from the past would "undo" those changes, which isn't really possible. Tested by creating a snapshot, running the new binary, and checking that the transition did not cause errors, and the snapshot is gone, and snapshots cannot be created anymore. New systemctl says: Unknown operation snapshot. Old systemctl says: Failed to create snapshot: Support for snapshots has been removed. IgnoreOnSnaphost settings are warned about and ignored: Support for option IgnoreOnSnapshot= has been removed and it is ignored http://lists.freedesktop.org/archives/systemd-devel/2015-November/034872.html

util-lib: split out resource limits related calls into rlimit-util.[ch]

remove unused includes This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.

core: rearrange code so that libsystemd/sd-bus/ does not include header files from core Stuff in src/shared or src/libsystemd should *never* include code from src/core or any of the tools, so don't do that here either. It's not OK!

shared: rename condition-util.[ch] to condition.[ch] Now that we only have one file with condition implementations around, we can drop the -util suffix and simplify things a bit.

core: get rid of condition.c and move the remaining call into util.c That way only one file with condition code remaining, in src/shared/, rather than src/core/. Next step: dropping the "-util" suffix from condition-util.[ch].

core: introduce the concept of AssertXYZ= similar to ConditionXYZ=, but fatal for a start job if not met

tests: add missing entry for LocalVariable to test-tables

bus: factor out bus policy items In order to re-use the policy definitions, factor them out into their own files.

core: add support for a configurable system-wide start-up timeout When this system-wide start-up timeout is hit we execute one of the failure actions already implemented for services that fail. This should not only be useful on embedded devices, but also on laptops which have the power-button reachable when the lid is closed. This devices, when in a backpack might get powered on by accident due to the easily reachable power button. We want to make sure that the system turns itself off if it starts up due this after a while. When the system manages to fully start-up logind will suspend the machine by default if the lid is closed. However, in some cases we don't even get as far as logind, and the boot hangs much earlier, for example because we ask for a LUKS password that nobody ever enters. Yeah, this is a real-life problem on my Yoga 13, which has one of those easily accessible power buttons, even if the device is closed.

tests: add missing entry to test-tables

core: remove systemd_running_as lookup functions They are unused and unlikely to ever be.

test-tables: add new entries One missing string found. A few things had to be moved around to make it possible to test them.

service: rename StartLimitAction enum to FailureAction It's used for the FailureAction property as well.

syscallfilter: port to libseccomp

test-tables: allow sparse tables and check mapping for -1 Jan: test-tables fails on my system. The one it's failing on is: syscall: 222 → (null) → -1 ... and indeed, our own tables should not have holes, but syscall tables certainly might.

test: add trivial test for syscall table and extend table tests to error paths

tests: add tests for string lookup tables The tests check if the tables have entries for all values in the enum, and that the entries are unique.