This should give admins more useful hints why a service failed.

The reaping of generator processes run as part of a daemon-reload should not
call waitid(PID_ALL). The waitid() call in execute_directory() is intended only
to reap the executed processes, but if a service process exits at about the
same time as a daemon-reload, then that service process is reaped as well,
preventing it from being reaped in the proper place in
manager_dispatch_sigchld().

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=43625

sd-daemon.h is a drop-in file, so we should make sure it doesn't break
builds for anybody.

https://bugs.freedesktop.org/show_bug.cgi?id=42675

The assumption that the initial job is the job with id==1 is incorrect.
Some jobs may be enqueued before the job that starts the default unit as
in this example:

 -.mount changed dead -> mounted
 Trying to enqueue job quotacheck.service/start/fail
 Installed new job quotacheck.service/start as 1
 Installed new job systemd-stdout-syslog-bridge.socket/start as 2
 Enqueued job quotacheck.service/start as 1
 Trying to enqueue job quotaon.service/start/fail
 Installed new job quotaon.service/start as 5
 Enqueued job quotaon.service/start as 5
 Activating default unit: default.target
 Trying to enqueue job graphical.target/start/replace

This fixes a bug where displaying of boot status messages was turned off
too early.

We do not support, and explicitly never want to support environment
variable settings and suchlike in tcpwrappers.

https://bugs.freedesktop.org/show_bug.cgi?id=45143

Immediately after forking off a process change the comm name and argv[0]
to "(foobar)" where "foobar" is the basename of the path we are about to
execute.

This should be useful when charting boot progress.

This patch adds WatchdogTimestamp[Monotonic] to the systemd service
D-Bus API. The timestamp is updated to the current time when the
service calls 'sd_nofity("WATCHDOG=1\n")'.
Using a timestamp instead of an 'alive' flag has two advantages:
1. No timeout is needed to define when a service is no longer alive.
   This simplifies both configuration (no timeout value) and
   implementation (no timeout event).
2. It is more robust. A 'dead' service might not be detected should
    systemd 'forget' to reset an 'alive' flag. It is much less likely
    to get a valid new timestamp if a service died.

Apparently the perfomance price for compression is to steep to apply it
for all objects >= 64 and < 512 in size, as measured by Arjan Van De
Ven, hence increase the threshold to 512 which yields better results.

We need to tell the X server to grab the keyboards
and mice associated with a hotplugged seat, so that
it doesn't have the ability to control the kernel
vt consoles.

Better don't export historic names for split / vs. /usr filesysystems.

When systemd starts, plymouth may be already displaying progress
graphically. Do not switch the console to text mode at that time.
All other users of reset_terminal_fd() do the switch as before.

This avoids a graphical glitch with plymouth, especially visible with
vesafb, but could be also seen as a sub-second blink with radeon.

https://bugzilla.redhat.com/show_bug.cgi?id=785548