tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

Move all unit states to basic/ and extend systemctl --state=help

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: watch SIGCHLD more closely to track processes of units with no reliable cgroup empty notifier When a process dies that we can associate with a specific unit, start watching all other processes of that unit, so that we can associate those processes with the unit too. Also, for service units start doing this as soon as we get the first SIGCHLD for either control or main process, so that we can follow the processes of the service from one to the other, as long as process that remain are processes of the ones we watched that died and got reassigned to us as parent. Similar, for scope units start doing this as soon as the scope controller abandons the unit, and thus management entirely reverts to systemd. To abandon a unit introduce a new Abandon() scope unit method call.

core: introduce new stop protocol for unit scopes By specifiy a Controller property when creating the scope a client can specify a bus name that will be notified with a RequestStop bus signal when the scope has been asked to shut down, instead of sending SIGTERM to the scope processes themselves. https://bugzilla.redhat.com/show_bug.cgi?id=1032695

core: convert PID 1 to libsystemd-bus This patch converts PID 1 to libsystemd-bus and thus drops the dependency on libdbus. The only remaining code using libdbus is a test case that validates our bus marshalling against libdbus' marshalling, and this dependency can be turned off. This patch also adds a couple of things to libsystem-bus, that are necessary to make the port work: - Synthesizing of "Disconnected" messages when bus connections are severed. - Support for attaching multiple vtables for the same interface on the same path. This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus calls which used an inappropriate signature. As a side effect we will now generate PropertiesChanged messages which carry property contents, rather than just invalidation information.

core: add new "scope" unit type for making a unit of pre-existing processes "Scope" units are very much like service units, however with the difference that they are created from pre-existing processes, rather than processes that systemd itself forks off. This means they are generated programmatically via the bus API as transient units rather than from static configuration read from disk. Also, they do not provide execution-time parameters, as at the time systemd adds the processes to the scope unit they already exist and the parameters cannot be applied anymore. The primary benefit of this new unit type is to create arbitrary cgroups for worker-processes forked off an existing service. This commit also adds a a new mode to "systemd-run" to run the specified processes in a scope rather then a transient service.