tree-wide: group include of libudev.h with sd-*

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

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

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

libudev: device - fix typo in udev_device_get_sysattr_list_entry() We were adding the attributes to the wrong list.

sd-device: get_subsystem - don't complain if a device does not have a subsystem

libudev-device: fix lazy loading of devlinks, properties and tags If the underlying device has not read in the properties yet, the generation will be 0, so make sure we trigger the reading at least once.

libudev: device - replace by a thin wrapper around sd-device

libudev: private - introduce udev_device_new_from_synthetic_event() This allows set_action(), read_uevent_file() and read_db() to be made internal to libudev.

udev: downgrade "has devpath" and "filled with db file" messages Udev debug messages have to be significantly overhauled... For now just downgrade those two. They are responsible for approximately 25% of debug output during boot and are rather useless.

udev: make set_usec_initialized() internal to libudev Instead introduce ensure_usec_initialized(), which copies the timestamp if possible otherwise sets it to now(CLOCK_MONOTONIC).

libudev: introduce clone_with_db() This allows us to move the db reading from udevd to libudev.

libudev: introduce udev_device_properties_copy() To copy properties from one device to another. Drop the equivalent functionality from udevd.

libudev: udev_device_read_db - drop unused argument

libudev: udev_device_add_property - implicitly mark properties for saving to db Properties should only be saved to the db when added to the udev_device by udevd, and only if the property does not start with a '.'. Make this implicit rather than expose the marking of properties.

udev/libudev: event - move {OLD_,}INTERFACE handling from udevd to libudev This should be internal to the library as it is only about reflecting the sysfs state in the udev_device.

libudev: private - make property_from_string_parse* static

util: rework strappenda(), and rename it strjoina() After all it is now much more like strjoin() than strappend(). At the same time, add support for NULL sentinels, even if they are normally not necessary.

libudev: private - drop some functions from the internal API

libudev: monitor - move nulstr parsing to libudev-device Hide the details a bit.

udev: event - introduce and use internal udev_device_shallow_clone()

udev: event - move renaming of udev_device to libudev This is not exposed in the public API. We want to simplify the internal libudev-device API as much as possible so that it will be simpler to rip the whole thing out in the future.

Assorted format fixes Types used for pids and uids in various interfaces are unpredictable. Too bad.

use correct format types

libudev: set errno properly in all error conditions of udev_device_new_from_syspath()

treewide: another round of simplifications Using the same scripts as in f647962d64e "treewide: yet more log_*_errno + return simplifications".

treewide: use log_*_errno whenever %m is in the format string If the format string contains %m, clearly errno must have a meaningful value, so we might as well use log_*_errno to have ERRNO= logged. Using: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/' Plus some whitespace, linewrap, and indent adjustments.

treewide: drop unnecessary trailing \n in log_*() calls

udev: move global property handling from libudev to udevd

udev: switch to systemd logging functions

udev: fix path for database names on 'change' event If a device does not have a major/minor number attached, we use different database names than if it does. On "change" events, we didn't copy the devnum over, therefore, we used different paths than on 'add' or 'remove' events (where devnum was properly copied). Fix this by always copying the devnum into the udev-device. (David: added commit-log from email)

udev: allow removing tags via TAG-="foobar" This extends the udev parser to support OP_REMOVE (-=) and adds support for TAG-= to remove previously set tags. We don't fail if the tag didn't exist. This is pretty handy if we ship default rules for seat-assignments and users want to exclude specific devices from that. They can easily add rules that drop any automatically added "seat" tags again.

libudev: set errno when udev_device_new_from_* or udev_device_get_parent_* fail

Remove unnecessary casts in printfs No functional change expected :)

everywhere: make use of new0() and macro() macros, and stop using perror()

use memzero(foo, length); for all memset(foo, 0, length); calls In trying to track down a stupid linker bug, I noticed a bunch of memset() calls that should be using memzero() to make it more "obvious" that the options are correct (i.e. 0 is not the length, but the data to set). So fix up all current calls to memset(foo, 0, length) to memzero(foo, length).

libudev: devices received from udev are always initialized

docs: remove unneeded the's in gudev docs https://bugs.freedesktop.org/show_bug.cgi?id=72164

libudev: always return NULL in _unref() APIs Returning anything else but NULL would suggest the caller's reference might still be valid, but it isn't, because the caller just invoked _unref() after all. This turns the return value into a typesafe shortcut that allows unreffing and resetting a reference in one line. In contrast to solutions for this which take a pointer to a pointer to accomplish the same this solution is just syntactic sugar the developer can make use of but doesn't have to, and this is particularly useful when immediately unreffing objects returned by function calls.

libudev: always return valid negative error codes on API functions

udev: declare some symbols static

typo fixes in man and comments

hwdb: add --device=<device-id> and --filter=<key name glob>

libude: remove special handling of "device" link, it should not be used

libudev: implement udev_device_set_attribute_value()

udev: move string copy functions to shared/

udev: in addition to DEVMODE, honor DEVUID, DEVGID from the uevent

libudev: do not resolve $attr{device} symlinks

libudev: update copyright headers

udev: use usec_t and now()

udev: remove SYMLINK "unique" option

man: fix a bunch of typos in docs https://bugs.freedesktop.org/show_bug.cgi?id=54501

udev: export udev_device_new_from_device_id()

udev: get rid of TEST_PREFIX and use unshare() to fake /sys, /dev, /run

udev: update docs, NEWS

udev: libudev - bump soname, remove deprecated functions, introduce symbol versions

libudev: prefix log macros with 'udev_'

docs: hook-up gtk-doc to 'make check'

udev: use startswith() and streq()

udev: remove configuration options for /dev, /sys, /run directories

udev: move libudev, gudev to src/; move gudev/docs/, udev/docs/ to to docs/