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.

nss: block various signals while running NSS lookups Let's make sure our poll() calls don't get interrupted where they shouldn't (SIGALRM, ...), but allow them to be interrupted where they should (SIGINT, ...). Fixes #1965

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

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.

hostname-util: introduce new is_gateway_hostname() call This moves is_gateway() from nss-myhostname into the basic APIs, and makes it more like is_localhost(). Also, we rename it to is_gateway_hostname() to make it more expressive. Sharing this function in src/basic/ allows us to reuse the function for routing name requests in resolved (in a later commit).

nss-myhostname: use LOOPBACK_IFINDEX instead of if_nametoindex("lo") Given that we already hardocde the loopback ifindex, following the kernel's own logic, we can replace the invocation of if_nametoindex("lo") with LOOPBACK_IFINDEX.

tree-wide: introduce mfree() Pretty trivial helper which wraps free() but returns NULL, so we can simplify this: free(foobar); foobar = NULL; to this: foobar = mfree(foobar);

util: split all hostname related calls into hostname-util.c

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.

nss-myhostname: always will in canonical hostname field when resolving addresses to hostnames https://bugs.freedesktop.org/show_bug.cgi?id=87634

nss-myhostname: introduce is_gateway() similar to the existing is_hostname()

nss-myhostname: also recognize "gateway." "gateway." skips adding the domain search path and saves some queries to the nameserver.

rtnl: when querying local addresses and gateways, take address family into account

nss-myhostname: always resolve the host name "gateway" to the local default gateway This is useful inside of containers or local networks to intrdouce a stable name of the default gateway host (in case of containers usually the host, in case of LANs usually local router).

networkd: add minimal client tool "networkd" to query network status In the long run this should become a full fledged client to networkd (but not before networkd learns bus support). For now, just pull interesting data out of networkd, udev, and rtnl and present it to the user, in a simple but useful output.

nss: always explicitly reset all error variables glibc appears to be broken if we don't explicitly reset all error variables, let's work around that. https://bugzilla.redhat.com/show_bug.cgi?id=1125975

nss-myhostname: don't include assert.h twice

shared: rename PROTO_ADDRESS_SIZE() to FAMILY_ADDRESS_SIZE() We mostly use "family" to refer to AF_INET, AF_INET6, etc, let's use this terminology here, too

nss: various minor fixes to nss-myhostname + nss-mymachines

nss-myhostname: simplify array building a bit

nss-myhostname: move NSS boilerplate to nss-util.h

nss-myhostname: move local address listing logic into shared, so that we can make use of it from machined

nss-myhostname: following the usual naming scheme for .c/.h files

nss-myhostname: various modernizations

nss-myhostname: resolve 'localhost' so that /etc/hosts becomes optional This makes sure nss-myhostname not only resolves the local host name to 127.0.0.2/::1 but also the host name 'localhost: to 127.0.0.1/::1. This makes installation of /etc/passwd optional, as it usually only includes a mapping for 'localhost'. This change also resolves ::1 to the local hostname (as before), but also lists 'localhost' as an alias. This means look-ups are now fully reversible, even though they are 1:n mappings. Finally, the module will no longer erroneously claim that local IP addresses which aren't on the loopback device were.

nss-myhostname: ensure that glibc's assert is used

move _cleanup_ attribute in front of the type http://lists.freedesktop.org/archives/systemd-devel/2013-April/010510.html

Use initalization instead of explicit zeroing in more places

nss-myhostname: copy first result to preallocated buffer Fixes a segfault in nscd when using nss-myhostname. Nscd expects that an NSS module's gethostbyname4_r function returns its first result in the pre-allocated gaih_addrtuple denoted by **pat. (See nscd/aicache.c in the Glibc sources.) However, nss-myhostname doesn't fill in **pat but allocates the first result in ‘buffer’, then sets *pat. So nscd crashes (e.g. when running ‘getent ahosts my-machine’). Hard to tell if this is a bug in nscd, since there doesn't seem to be a proper API spec for gethostbyname4_r. But in any case, this patch fixes the crash by copying the first result to **pat.

nss-myhostname: remove duplicate LICENCE Also update the licence in the source files.

nss-myhostname: move to subdirectory In order to merge into the systemd repos.