Taken from
https://code.launchpad.net/~pali/ubuntu/raring/udev/hp-elitebook-8460p/+merge/157420



Signed-off-by: Martin Pitt <martinpitt@gnome.org>

It's only needed for static linking.

https://bugs.freedesktop.org/show_bug.cgi?id=63309

Make "systemd-analyze dot" output only lines with units matching
given glob(7) patterns. Add --from-pattern and --to-pattern options.
Without any patterns all relationships are printed as before.

A relationship must match the follwing expression:

    (isempty(from) || from[0] || from[1] || .. || from[n]) &&
    (isempty(to) || to[0] || to[1] || .. || to[n]) &&
    (isempty(P) || P[0] || P[1] || ... || P[n])

where from[] and to[] are lists of patterns provided with subsequent
--from-pattern and --to-pattern respectively. P[] is a list of  additional
patterns provided after the "dot" subcommand.

Avoid "sender uid=65534, message ignored" case, where no credentials can
be read on the sender side.

Seems, the server socket does not enable credential receiving fast
enough, and the message from the client (without credential) sometimes
is queued before the credential passing was active.

We only use the image name in the case we're adding a kernel

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>

Avoid the dynamic allocation for the _UID, _GID, and _PID strings.
The maximum size of the string can be determined at compile time.

The code has only been compile tested.

When systemd was compiled without audit support, do not collect the
audit session and loginuid in the journal. This is saving a couple of
syscalls and memory allocations per log message.

Avoid memory allocations to construct the path for files in the
procfs. The procfs paths are way shorter than the PATH_MAX so we
can use snprintf on a string located on the stack. This shows up
as a win on x86 using the benchmark program below.

$ make libsystemd-shared.la; gcc -O2 -Isrc/systemd/ -Isrc/ \
	-o simple-perf-test simple-perf-test.c \
	.libs/libsystemd-shared.a  -lrt

 #include "shared/util.h"
void test_once(void) {
	pid_t pid = getpid();
	char *tmp = NULL;

	get_process_comm(pid, &tmp);
	free(tmp);
	tmp = NULL;
	get_process_cmdline(pid, 0, 1, &tmp);
	free(tmp);
	is_kernel_thread(pid);
	tmp = NULL;
	get_process_exe(pid, &tmp);
	free(tmp);
}

int main(int argc, char **argv)
{
	int i;
	for (i = 0; i < 50000; ++i)
		test_once();
}

When switching root, i.e. LANG can be set to the locale of the initramfs
or "C", if it was unset. When systemd deserializes LANG in the real root
this would overwrite the setting previously gathered by locale_set().

To reproduce, boot with an initramfs without locale.conf or change
/etc/locale.conf to a different language than the initramfs and check a
daemon started by systemd:

$ tr "$\000" '\n' </proc/$(pidof sshd)/environ | grep LANG
LANG=C

To prevent that, serialization of environment variables is skipped, when
serializing for switching root.

https://bugzilla.redhat.com/show_bug.cgi?id=949525

In recent glibc, many commonly-used librt functions have moved
from librt to libc. This results in dbus' configure.ac
concluding that we don't need to link in librt. However,
sd-daemon.c needs it for mq_getattr(), causing the build
to fail.

dbus doesn't use POSIX message queues, so I'd prefer to be
able to avoid "if on Linux, link librt for sd-daemon.c".

This would break backwards skipping.

https://bugs.freedesktop.org/show_bug.cgi?id=63250

Fix for:
  b92bea5d
Causing:
  systemd-logind[265]: Assertion 'd = event.data.ptr' failed at src/shared/dbus-loop.c:233, function bus_loop_dispatch(). Aborting.

Fixes a memleak in error path in exec_context_load_environment.

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.

A fix for ff03aed0.

For some reason this shows up on i686 only:
src/udev/udev-builtin-usb_id.c:192:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

So far we didn't place spaces between the box drawing chars and the
values next to them. Let's be consistent here.

(Or to turn this around: if we really want to place a space there we
probably should do that in all our tree outputs, not just here...)

It's probably a good idea to minimize the number of field names to show
in the "systemctl status" output, in order to make them useful as a
guide for the reader how things are "grouped". This patch moves
information about the used socket technology to the end of the output
lines in brackets, rather than into the field names. This turns the used
socket technology into what it is -- peripheral meta information --
instead of something that was at the core.

New output:

systemd-journald.socket - Journal Socket
         Loaded: loaded (/usr/lib/systemd/system/systemd-journald.socket; static)
         Active: active (running) since Fr 2013-03-29 02:16:30 CET; 1 weeks 0 days ago
           Docs: man:systemd-journald.service(8)
                 man:journald.conf(5)
                 man:systemd-journald.service(8)
                 man:journald.conf(5)
         Listen: /run/systemd/journal/stdout (Stream)
                 /run/systemd/journal/socket (Datagram)
                 /dev/log (Datagram)

$ systemctl status null.target
null.target - NYAN
   Loaded: loaded (/home/alxchk/.config/systemd/user/null.target; disabled)
  Drop-In: /home/alxchk/.config/systemd/user/null.target.d
           └─ descr.conf, install-1.conf, install.conf
           /etc/systemd/user/null.target.d
           └─ test.conf
   Active: active since Пт 2013-04-05 20:42:13 EEST; 1min 58s ago