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There are a lot of forking daemons that do not exactly follow the
initialization steps as described in daemon(7). It is common that they
do not bother waiting in the parent process for the child to write the
PID file before exiting. The daemons' developers often do not perceive
this as a bug and they're unwilling to change.
Currently systemd warns about the missing PID file and falls back to
guessing the main PID. Being not quite deterministic, the guess can be
wrong with bad consequences. If the guessing is disabled, determinism is
achieved at the cost of losing the ability of noticing when the main
process of the service dies.
As long as it does not negatively affect properly written services,
systemd should strive for compatibility even with services with racy
daemonization. It is possible to provide determinism _and_ main process
supervision to them.
If the PID file is not there, rather than guessing and considering the
service running immediately after getting the SIGCHLD from the ExecStart
(or ExecStartPost) process, we can keep the service in the activating
state for a bit longer. We can use inotify to wait for the PID file to
appear. Only when it finally does appear and we read a valid PID from
it, we'll move the service to the running state. If the PID file never
appears, the usual timeout kicks in and the service fails.
path_*() functions operate on "Path *p" and they do not touch PathSpec
internals directly.
pathspec_*() functions operate on "PathSpec *s". The PathSpec class will
be useful outside of path.c.
rc-local.service acts as an ordering barrier even if its condition is
false, because conditions are evaluated when the service is about to be
started.
To avoid the ordering barrier in a legacy-free system, add a generator
to pull rc-local.service into the transaction only if the script is
executable.
If/when we rewrite SysV compatibility into a generator, this one can become
a part of it.
Both kmsg-syslogd and the real syslog service want to receive
SCM_CREDENTIALS. With socket activation it is too late to set
SO_PASSCRED in the services.
Since Linux 3.2 in order to receive SCM_CREDENTIALS it is not sufficient
to set SO_PASSCRED just before recvmsg(). The option has to be already
set when the sender sends the message.
With socket activation it is too late to set the option in the service.
It must be set on the socket right from the start.
See the kernel commit:
16e57262 af_unix: dont send SCM_CREDENTIALS by default
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=757628
To give the administrator more hints about failures occuring in spawning
of commands than just the exit code, log the strerror.
All fds are closed, so reopen the log.
Related-to: https://bugzilla.redhat.com/show_bug.cgi?id=752901
Several functions called from the "sd(EXEC)" process try to log messages
when all the file descriptors are already closed, including the logging
ones. The logging functions do not expect their fds to be closed and
they hit an assertion failure. The failure wants to be logged too,
so there is an infinite recursion, ended by a SIGSEGV.
When we close all fds, we must let log.c know about it.
The code should probably look like the statements above it.
Please verify, I just detected it using cppcheck.
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
A service that drops its privileges may not be able to remove it when it
exits. The stale pidfile is not a problem as long as the service
carefully recognizes it on its next start.
systemd would produce a warning after the service exits:
PID ... read from file ... does not exist. Your service or init
script might be broken.
Silence the warning in this case. Still warn if this error is detected
when loading the pidfile after service start.
Noticed by Miroslav Lichvar in
https://bugzilla.redhat.com/show_bug.cgi?id=752396
DefaultStandardOutput is syslog anyway. There's no reason to assume that
the administrator would want these units to be excluded when he configures
a different DefaultStandardOutput.
Zeroed .ut_tv values in wtmp confuse chkrootkit.
Reported and debugged by Norman Smith. This is based on his patch,
but modified to behave more like upstart did in F14 and cleaned up.
https://bugzilla.redhat.com/show_bug.cgi?id=743696
Some controllers have scaling problems when many empty cgroups exist.
Hence, as soon as we get a notification that a cgroup is empty, delete
it. This is also nice to keep the systemd-cgls output short.
Adds arguments --root= --runtime --no-legend.
Adds verbs link mask unmask reenable list-unit-files.
Also uses list-unit-files to make nicer enable and disable completions.
Rebased due to changes in systemctl.
This patch adds support for the Mageia Linux distribution:
http://www.mageia.org/
Mageia is a fork of Mandriva although some divergence has already occured
and thus inclusion of these changes upstream allow us to (hopefully)
migrate more rapidly to the new standard approaches systemd offers.
Indeed, we already use the preferred mechanism of OS identification via
the /etc/os-release file rather than a distro specific variation.
This patch mostly mirrors the patch added previously for Mandriva
support. In addition to those original authors, this patch was mostly
written by Dexter Morgan with help from Colin Guthrie and Eugeni Dodonov.
Devices with random keys (swap), should not be ordered before local-fs.target,
as this creates a cycle with systemd-load-random-seed.service (and also it
does not make sense, a swap device is not a local-fs).
Since remote-fs-pre.target is optional we cannot count on it to order
remote mounts after network.target, so let's add that order explicitly
in addition to remote-fs-pre.target.
https://bugzilla.redhat.com/show_bug.cgi?id=749940
We might have trimmed the cgroup tree previously, hence don't trust our
own "realized" flag, always recreate cgroup tree before applying our
attributes to make sure this actually works out.
https://bugzilla.redhat.com/show_bug.cgi?id=749687
After reexec PID 1 our bus connection is invalidated. Hence don't try to
reuse it, just terminate so that when we are spawned the next time we
just get a new one.
Spotted by Marti Raudsepp.
The problem was first noted in a bug report against Arch's initscripts.
Reported-by: Taylan Ulrich Bayırlı <taylanbayirli@gmail.com>
Reported-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
The first column is given the width of the widest entry,
if possible, otherwise all entries are ellipsized to fit
in ($COLUMNS - (width of second column)).
[ Added a few fixes, calculate state_cols too, respect '--no-legend',
better handling of '--full' -- michich ]
In the case of completion for the 'restart' verb, passing the invalid
unit name (the colums header) causes completion to cease functioning
entirely, with the error:
Failed to issue method call: Unit name UNIT is not valid.
This adds a small wrapper function for systemctl which can have common
options added to it.
