coredump: rework coredumping logic This reworks the coredumping logic so that the coredump handler invoked from the kernel only collects runtime data about the crashed process, and then submits it for processing to a socket-activate coredump service, which extracts a stacktrace and writes the coredump to disk. This has a number of benefits: the disk IO and stack trace generation may take a substantial amount of resources, and hence should better be managed by PID 1, so that resource management applies. This patch uses RuntimeMaxSec=, Nice=, OOMScoreAdjust= and various sandboxing settings to ensure that the coredump handler doesn't take away unbounded resources from normally priorized processes. This logic is also nice since this makes sure the coredump processing and storage is delayed correctly until /var/systemd/coredump is mounted and writable. Fixes: #2286

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.

Use /proc/net/sockstat6 to detect IPv6 support The file /sys/module/ipv6 does not exist in all container implementations (e.g. Virtuozzo). Using /proc/net/sockstat6 detects IPv6 support reliably in these environments, too. This file does not exist when the kernel is not compiled with IPv6 support, or if IPv6 support is disabled, so simply checking for existence should be a suitable check. Fixes #2059

journal: unbreak sd_journal_sendv Borked since commit 3ee897d6c2401effbc82f5eef35fce405781d6c8 Author: Lennart Poettering <lennart@poettering.net> Date: Wed Sep 23 01:00:04 2015 +0200 tree-wide: port more code to use send_one_fd() and receive_one_fd() because here our fd is not connected and we need to specify the address.

basic: re-sort includes My previous patch to only include what we use accidentially placed the added inlcudes in non-sorted order.

journal-remote: split-mode=host, remove port from journal filename When constructing the journal filename to store logs from a remote host, remove the port of the tcp connection, as the port will change with every reboot/connection loss between sender/reveiver machines. Having the port in the filename will cause a new journal file to be created for every reboot or connection loss. For the implementation, a new argument "bool include_port" is added to the getpeername_pretty() function. This is passed to the sockaddr_pretty() function. The value of the include_port argument is set to true in all calls of getpeername_pretty(), except for 2 calls in journal-remote.c, where it is set to false.

basic: include only what we use This is a cleaned up result of running iwyu but without forward declarations on src/basic.

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

user-util: move UID/GID related macros from macro.h to user-util.h

util-lib: move string table stuff into its own string-table.[ch]

util-lib: split string parsing related calls from util.[ch] into parse-util.[ch]

socket-util: move remaining socket-related calls from util.[ch] to socket-util.[ch]

util-lib: move ether_addr_to_string() into ether-addr-util.c

util-lib: split our string related calls from util.[ch] into its own file string-util.[ch] There are more than enough calls doing string manipulations to deserve its own files, hence do something about it. This patch also sorts the #include blocks of all files that needed to be updated, according to the sorting suggestions from CODING_STYLE. Since pretty much every file needs our string manipulation functions this effectively means that most files have sorted #include blocks now. Also touches a few unrelated include files.

basic: fix error/memleak in socket-util Probably a typo, checking 'ret' instead of the return value 'p'. This might cause the function to return failure, even though it succeeded. Furthermore, it might leak resources.

socket-util: library calls shouldn't log on their own Instead, make sure that all callers log properly.

build-sys: split internal basic/ library from shared/ basic/ can be used by everything cannot use anything outside of basic/ libsystemd/ can use basic/ cannot use shared/ shared/ can use libsystemd/