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.

tree-wide: expose "p"-suffix unref calls in public APIs to make gcc cleanup easy GLIB has recently started to officially support the gcc cleanup attribute in its public API, hence let's do the same for our APIs. With this patch we'll define an xyz_unrefp() call for each public xyz_unref() call, to make it easy to use inside a __attribute__((cleanup())) expression. Then, all code is ported over to make use of this. The new calls are also documented in the man pages, with examples how to use them (well, I only added docs where the _unref() call itself already had docs, and the examples, only cover sd_bus_unrefp() and sd_event_unrefp()). This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we tend to call our destructors these days. Note that this defines no public macro that wraps gcc's attribute and makes it easier to use. While I think it's our duty in the library to make our stuff easy to use, I figure it's not our duty to make gcc's own features easy to use on its own. Most likely, client code which wants to make use of this should define its own: #define _cleanup_(function) __attribute__((cleanup(function))) Or similar, to make the gcc feature easier to use. Making this logic public has the benefit that we can remove three header files whose only purpose was to define these functions internally. See #2008.

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

util-lib: split out allocation calls into alloc-util.[ch]

tree-wide: clean up log_syntax() usage - Rely everywhere that we use abs() on the error code passed in anyway, thus don't need to explicitly negate what we pass in - Never attach synthetic error number information to log messages. Only log about errors we *receive* with the error number we got there, don't log any synthetic error, that don#t even propagate, but just eat up. - Be more careful with attaching exactly the error we get, instead of errno or unrelated errors randomly. - Fix one occasion where the error number and line number got swapped. - Make sure we never tape over OOM issues, or inability to resolve specifiers

networkd: split up networkd.h into per-object header files No functional changes, just moving definitions into separate header files.

sd-netlink: rename from sd-rtnl

networkd-fdb: indentation/whitespace fixes

networkd: improve how networkd logs things This makes adds a couple of fixes: - Introduces log_netdev_error_errno() and friends, which takes an error number, and matches what log_link_error_errno() and friends do. - Replaces a lof ot strerror() usage with log_netdev_error_errno(), log_link_error_errno() and log_erro_errno() - Uppercases the first character of many log messages, after all this is supposed to be english language - Drops manual negating of error codes before passing them to log functions, the log functions all do that internally anyway. Some other minor fixes. Behaviour should not change really.

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.

networkd: fdb - fix const warning

networkd: fdb - refactor a bit Pass around Link objcets rather than FdbEntry objects. The link objects have an up-to-date ifname we can use for logging. match_name sholud _never_ be used for anything except matching. Firstly, it may be unset (usually is), and secondly it may not be up-to-date.

networkd: add FDB support