The original Makefile.am was drawn to the top level. This commit
breaks it out into the various directories with SUBDIRS connecting
them. This makes each directory easier to maintain.
This is the first pass attempting to keep as much of the build system
as is necessary for only udev from the fork. Emphasis was given to
configure.ac. Gutting had to be done to Makefile.am but this needs
work to be broken out into SUBDIR Makefile.am which each address those
pieces.
This commit is a first attempt to isolate the udev code from the
remaining code base. It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed. This is a sweeping commit which may easily have
missed needed code. Files can be retrieved by doing a checkout
from the previous commit:
git checkout 2944f347d0 -- <filename>
This is the initial fork of the code base from freedsktop.org.
The code is provided here as a reference of the initial starting
point and for possible future checkouts after a large portion
of this code is removed.
Merge git://anongit.freedesktop.org/systemd/systemd
The point is to allow the use of journald functions by other binaries.
Before, journald code was split into multiple files (journald-*.[ch]),
but all those files all required functions from journald.c. And
journald.c has its own main(). Now, it is possible to link against
those functions, e.g. from test binaries.
This constitutes a fix for https://bugzilla.redhat.com/show_bug.cgi?id=872638.
The patch does the following:
1. rename journald.h to journald-server.h and move corresponding code
to journald-server.c.
2. add journald-server.c and other journald-*.c parts to
libsystemd-journal-internal.
3. remove journald-syslog.c from test_journal_syslog_SOURCES, since
it is now contained in libsystemd-journal-internal.
There are no code changes, apart from the removal of a few static's,
to allow function calls between files.
Supports Python versions 2.6 through 3.3 (tested on 2.7 and 3.2).
See JournalHandler docstring for usage details.
[zj: - use send() instead of using sendv() directly
- do exception handling like in the logging module
- bumped min version to python2.6, since the module
does not work with python2.5 anyway ]
This is the usual setup, where pythonX.Y and pythonX.Y-config go
together. Using python-config with python3 will only lead to
confusion.
--libs is changed to --ldflags, since the latter also includes other
required flags like -L<dir>.
The tests for HAVE_PYTHON and HAVE_PYTHON_DEVEL are separated. It is
possible to have python development libraries installed without the
binary (or to want to build python modules without using python during
the build).
A line is added to the output, to show what flags will be used for
python.
Makes the output way nicer with shorter code. Also brings
systemd-analyze behaviour more in line with other systemd-programs.
Argparse is in Python since 2.6, and is available as a package for
previous versions, if someone is stuck with very old Python.
If a 'change' event is supposed to remove created symlinks, we create
a new device structure from the sysfs device and fill it with the list
of links, to compute the delta of the old and new list of links to apply.
If the device is already 'remove'd by the kernel though, udev fails to
create the device structure, so the links are not removed properly.
> From: Neil Brown <nfbrown@suse.com>
> Date: Thu, 8 Nov 2012 10:39:06 +0100
> Subject: [PATCH] If a 'change' event does not get handled by udev until
> after the device has subsequently disappeared, udev mis-handles
> it. This can happen with 'md' devices which emit a change
> event and then a remove event when they are stopped. It is
> normally only noticed if udev is very busy (lots of arrays
> being stopped at once) or the machine is otherwise loaded
> and reponding slowly.
>
> There are two problems.
>
> 1/ udev_device_new_from_syspath() will refuse to create the device
> structure if the device does not exist in /sys, and particularly if
> the uevent file does not exist.
> If a 'db' file does exist, that is sufficient evidence that the device
> is genuine and should be created. Equally if we have just received an
> event from the kernel about the device, it must be real.
>
> This patch just disabled the test for the 'uevent' file, it doesn't
> try imposing any other tests - it isn't clear that they are really
> needed.
>
> 2/ udev_event_execute_rules() calls udev_device_read_db() on a 'device'
> structure that is largely uninitialised and in particular does not
> have the 'subsystem' set. udev_device_read_db() needs the subsystem
> so it tries to read the 'subsystem' symlink out of sysfs. If the
> device is already deleted, this naturally fails.
> udev_event_execute_rules() knows the subsystem (as it was in the
> event message) so this patch simply sets the subsystem for the device
> structure to be loaded to match the subsystem of the device structure
> that is handling the event.
>
> With these two changes, deleted handling of change events will still
> correctly remove any symlinks that are not needed any more.
Use udev_device_new() instead of allowing udev_device_new_from_syspath()
to proceed without a sysfs device.
