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Zbigniew Jędrzejewski-Szmek 953bf4604f units: add system-update-cleanup.service to guard against offline-update loops 
Note: the name is "system-update-cleanup.service" rather than
"system-update-done.service", because it should not run normally, and also
because there's already "systemd-update-done.service", and having them named
so similarly would be confusing.

In https://bugzilla.redhat.com/show_bug.cgi?id=1395686 the system repeatedly
entered system-update.target on boot. Because of a packaging issue, the tool
that created the /system-update symlink could be installed without the service
unit that was supposed to perform the upgrade (and remove the symlink). In
fact, if there are no units in system-update.target, and /system-update symlink
is created, systemd always "hangs" in system-update.target. This is confusing
for users, because there's no feedback what is happening, and fixing this
requires starting an emergency shell somehow, and also knowing that the symlink
must be removed. We should be more resilient in this case, and remove the
symlink automatically ourselves, if there are no upgrade service to handle it.

This adds a service which is started after system-update.target is reached and
the symlink still exists. It nukes the symlink and reboots the machine. It
should subsequently boot into the default default.target.

This is a more general fix for
https://bugzilla.redhat.com/show_bug.cgi?id=1395686 (the packaging issue was
already fixed).
2016-11-29 01:40:34 -05:00
.github CONTRIBUTING: reword the part about unsetting the label (#4716) 2016-11-23 08:52:19 +01:00
.mkosi mkosi: install Fedora 25 2016-10-06 11:54:24 -04:00
catalog catalog: add more Korean translations 2016-10-22 17:49:52 +02:00
coccinelle tree-wide: drop NULL sentinel from strjoin 2016-10-23 11:43:27 -04:00
docs docs: add .gitignore 2015-07-06 17:47:38 +02:00
factory/etc factory: remove broken pam_limits 2014-07-30 15:21:54 +02:00
hwdb Revert "hwdb/parse_hwdb.py: open files with UTF-8 mode" 2016-11-25 07:59:37 +01:00
m4 build-sys: Perform flag tests in context to existing flags 2016-02-06 14:57:46 +01:00
man units: add system-update-cleanup.service to guard against offline-update loops 2016-11-29 01:40:34 -05:00
network network: allow LLDP packets to cross non-customer bridges for container network interfaces 2016-05-09 15:45:31 +02:00
po catalog,po: update Polish translation (#4290) 2016-10-05 22:59:37 +02:00
rules rules: introduce disk/by-id (model_serial) symlinks for NVMe drives (#3974) 2016-08-17 14:10:28 +02:00
shell-completion analyze: add syscall-filter verb 2016-11-03 09:35:35 -04:00
src Merge pull request #4761 from fsateler/python3 2016-11-28 21:10:57 +01:00
sysctl.d treewide: fix typos and remove accidental repetition of words 2016-07-11 16:18:43 +02:00
system-preset unit: drop console-shell.service (#4298) (#4325) 2016-10-10 12:06:26 +02:00
sysusers.d remove bus-proxyd 2016-02-12 19:10:01 +01:00
test Use python3 explicitly in all python scripts 2016-11-28 15:00:20 -03:00
tmpfiles.d treewide: fix typos and remove accidental repetition of words 2016-07-11 16:18:43 +02:00
tools Use python3 explicitly in all python scripts 2016-11-28 15:00:20 -03:00
units units: add system-update-cleanup.service to guard against offline-update loops 2016-11-29 01:40:34 -05:00
xorg login: support user-bus on dbus1 2015-08-31 18:12:37 +02:00
.dir-locals.el editors: only extend line width to 119 for C and XML files 2016-02-10 12:29:32 +01:00
.editorconfig editors: only extend line width to 119 for C and XML files 2016-02-10 12:29:32 +01:00
.gitattributes git: indicate that tabs are never OK in the systemd tree 2013-10-30 02:25:38 +01:00
.gitignore .gitignore: ignore precompiled GCC headers (#4516) 2016-10-28 13:03:01 -04:00
.mailmap NEWS: add contributor list to news file 2016-11-02 15:52:57 -06:00
.travis.yml remove gudev and gtk-doc 2015-06-03 00:22:53 +02:00
.vimrc vimrc: fix indentation logic for our docbook xml files 2016-04-29 12:23:34 +02:00
.ycm_extra_conf.py ycm: update flag blacklist 2014-06-04 15:41:10 -04:00
autogen.sh build-sys/autogen: don't use bashisms (#4489) 2016-10-25 19:39:48 -04:00
CODING_STYLE CODING_STYLE fixes (#3804) 2016-07-25 22:34:42 +03:00
configure.ac build-sys: explicitly require python3 2016-11-28 15:00:20 -03:00
DISTRO_PORTING build-sys: Allow disabling installation of pam config snippet 2016-10-12 14:09:14 -03:00
HACKING documentation: add a short document describing how to test your systemd build tree (#3763) 2016-07-20 22:15:54 -04:00
LICENSE.GPL2 relicense to LGPLv2.1 (with exceptions) 2012-04-12 00:24:39 +02:00
LICENSE.LGPL2.1 licence: remove references to old FSF address 2012-12-17 11:41:31 +01:00
Makefile-man.am man: add journal-upload.conf(5) 2016-10-15 18:45:18 -04:00
Makefile.am units: add system-update-cleanup.service to guard against offline-update loops 2016-11-29 01:40:34 -05:00
mkosi.build mkosi: drop git clean 2016-10-06 11:54:24 -04:00
mkosi.default mkosi: create .mkosi directory 2016-10-06 11:53:58 -04:00
NEWS core: add 'c' in confirmation_spawn to resume the boot process 2016-11-17 18:16:50 +01:00
README README: list dependencies for testing 2016-10-17 16:54:27 +00:00
README.md documentation: add a short document describing how to test your systemd build tree (#3763) 2016-07-20 22:15:54 -04:00
TODO calendarspec: add support for scheduling timers at the end of the month 2016-11-23 12:37:43 -05:00

README.md

systemd - System and Service Manager

Build Status
Coverity Scan Status

Details

General information about systemd can be found in the systemd Wiki.

Information about build requirements are provided in the README file.

Consult our NEWS file for information about what's new in the most recent systemd versions.

Please see the HACKING file for information how to hack on systemd and test your modifications.

Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.

When preparing patches for systemd, please follow our Coding Style Guidelines.

If you are looking for support, please contact our mailing list or join our IRC channel.