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.

shared: include what we use The next step of a general cleanup of our includes. This one mostly adds missing includes but there are a few removals as well.

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

util-lib: split out user/group/uid/gid calls into user-util.[ch]

util-lib: split out fd-related operations into fd-util.[ch] There are more than enough to deserve their own .c file, hence move them over.

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.

core: optionally create LOGIN_PROCESS or USER_PROCESS utmp entries When generating utmp/wtmp entries, optionally add both LOGIN_PROCESS and INIT_PROCESS entries or even all three of LOGIN_PROCESS, INIT_PROCESS and USER_PROCESS entries, instead of just a single INIT_PROCESS entry. With this change systemd may be used to not only invoke a getty directly in a SysV-compliant way but alternatively also a login(1) implementation or even forego getty and login entirely, and invoke arbitrary shells in a way that they appear in who(1) or w(1). This is preparation for a later commit that adds a "machinectl shell" operation to invoke a shell in a container, in a way that is compatible with who(1) and w(1).

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

shared/utmp-wtmp: add parameter for origin tty and callback userdata Instead of looking up the tty from STDIN, let utmp_wall() take an argument to specify an origin tty for the wall message. Only if that argument is NULL do the STDIN lookup. Also add an void *userdata argument that is handed back to the callback function.

shared: add terminal-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.

include <poll.h> instead of <sys/poll.h> include-what-you-use automatically does this and it makes finding unnecessary harder to spot. The only content of poll.h is a include of sys/poll.h so should be harmless.

shared: wtmp-utmp - don't clear store_wtmp in utmp_put_dead_process() Also modernize a few other things and add comments to explain CID #1237503 and CID #1237504.

utmp-wtmp: allow overriding username on wall utmp_wall() now takes an optional argument 'username_override' which allows the caller to override the username shown on wall messages. journald will use this to inform users that its wall messages comes from 'systemd-journald'.

utmp: make sure we don't write the utmp reboot record twice on each boot (Also, only send the audit msg once, too)

Get rid of our reimplementation of basename The only problem is that libgen.h #defines basename to point to it's own broken implementation instead of the GNU one. This can be fixed by #undefining basename.

Add __attribute__((const, pure, format)) in various places I'm assuming that it's fine if a _const_ or _pure_ function calls assert. It is assumed that the assert won't trigger, and even if it does, it can only trigger on the first call with a given set of parameters, and we don't care if the compiler moves the order of calls.

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 Before, we would initialize many fields twice: first by filling the structure with zeros, and then a second time with the real values. We can let the compiler do the job for us, avoiding one copy. A downside of this patch is that text gets slightly bigger. This is because all zero() calls are effectively inlined: $ size build/.libs/systemd text data bss dec hex filename before 897737 107300 2560 1007597 f5fed build/.libs/systemd after 897873 107300 2560 1007733 f6075 build/.libs/systemd … actually less than 1‰. A few asserts that the parameter is not null had to be removed. I don't think this changes much, because first, it is quite unlikely for the assert to fail, and second, an immediate SEGV is almost as good as an assert.

Modernization Use _cleanup_ and wrap lines to ~80 chars and such.

Remove some dead code Based on coverity report.

utmp: make gcc shut up, we need to pass an int here, not size_t

utmp-wtmp: don't try to read past end of string systemd-199/src/shared/utmp-wtmp.c:228: buffer_size_warning: Calling strncpy with a maximum size argument of 32 bytes on destination array "store.ut_line" of size 32 bytes might leave the destination string unterminated. The destination string is unterminated on purpose, but we must remember that.

util: split-out path-util.[ch]

move more common files to shared/ and add them to shared.la