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Backports of patch from systemd git to stable distributions
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Zbigniew Jędrzejewski-Szmek 05c6f341b1 Allow the fallback hostname to be overriden using an environment variable 
See https://bugzilla.redhat.com/show_bug.cgi?id=1893417 for the back story:
the fallback hostname matters a lot in certain environments. Right now the only
way to configure the fallback hostname is by recompiling systemd, which is
obviously problematic in case when the fallback hostname shall differ between
different editions of the same distro that share a single compiled rpm.

By making this overridable through an envvar, we're providing an escape hatch
without making this a top-level api. Later on a way to set this through
os-release is added, but I think the approach with the variable is still
useful. It it very convenient for testing, or to override settings only in a
particular service, etc.
2021-02-22 20:10:55 +01:00
.github ci: enable DNS over TLS using OpenSSL in the build test 2021-02-17 16:41:23 +01:00
.lgtm/cpp-queries lgtm: complain about accept() [people should use accept4() instead, due to O_CLOEXEC] 2019-04-10 20:03:38 +02:00
.mkosi Move shared mkosi settings to a single file in mkosi.default.d/ 2021-01-06 12:10:58 +00:00
.semaphore ci: migrate to Semaphore CI 2.0 2021-01-15 20:18:29 +01:00
catalog license: LGPL-2.1+ -> LGPL-2.1-or-later 2020-11-09 13:23:58 +09:00
coccinelle coccinelle: ignore specific cases to use SYNTHETIC_ERRNO() macro 2020-11-27 14:35:20 +09:00
docs Allow the fallback hostname to be overriden using an environment variable 2021-02-22 20:10:55 +01:00
factory/etc man: move 'files' module in NSS 'hosts:' line before myhostname 2020-08-17 18:55:59 +02:00
hwdb.d https://github.com/systemd/systemd/issues/15360 2021-02-18 20:49:12 +01:00
man os-release: add the DEFAULT_HOSTNAME= setting 2021-02-22 20:10:55 +01:00
mkosi.default.d mkosi: Enable InstallDirectory and SourceFileTransferFinal options 2021-01-06 23:28:34 +00:00
modprobe.d license: LGPL-2.1+ -> LGPL-2.1-or-later 2020-11-09 13:23:58 +09:00
network networkd: Enable IPv6SendRA on builtin network files 2021-01-06 20:00:49 +01:00
po Translations update from Weblate (#18537) 2021-02-11 00:55:41 +09:00
presets license: LGPL-2.1+ -> LGPL-2.1-or-later 2020-11-09 13:23:58 +09:00
rules.d no blkid for mmcblk[0-9]boot[0-9] 2021-02-13 10:38:29 +01:00
shell-completion shell-completion: complete --legend=no for resolvectl and systemctl 2021-02-17 21:09:14 +01:00
src Allow the fallback hostname to be overriden using an environment variable 2021-02-22 20:10:55 +01:00
sysctl.d sysctl.d: shorten comment 2021-01-15 10:33:29 +01:00
sysusers.d license: LGPL-2.1+ -> LGPL-2.1-or-later 2020-11-09 13:23:58 +09:00
test network: rename UseFQDN= -> UseHostname= 2021-02-18 21:47:37 +01:00
tmpfiles.d udev: allow kvm group to access vhost-net device 2021-01-13 13:12:26 +04:00
tools update-dbus-docs: use color in summary 2021-02-06 11:41:42 +01:00
units units: turn off DNSSEC validation when timesyncd resolves hostnames 2021-02-14 22:05:18 +01:00
xorg scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
.clang-format clang-format: set SpaceBeforeParens to ControlStatementsExceptForEachMacros 2020-11-16 16:57:51 +09:00
.ctags editors: Prevent ctags from following symlinks 2019-02-15 11:01:20 -08:00
.dir-locals.el scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
.editorconfig editorconfig: add man configuration 2020-05-26 15:37:05 +02:00
.gitattributes udev: Extract RAM properties from DMI information 2020-12-16 18:32:29 +01:00
.gitignore Move shared mkosi settings to a single file in mkosi.default.d/ 2021-01-06 12:10:58 +00:00
.lgtm.yml lgtm: drop the TMPDIR/meson workaround 2020-03-03 20:27:42 +01:00
.mailmap NEWS: update contributors list for v246-pre 2020-07-23 17:30:54 +02:00
.packit.yml Revert "ci: build on Fedora ELN as well" 2021-02-15 19:02:59 +00:00
.vimrc scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
.ycm_extra_conf.py ycm: add doc string for all the functions in configuration file 2017-11-29 13:21:49 -07:00
configure tree-wide: add spdx header on all scripts and helpers 2021-01-28 09:55:35 +01:00
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 tree-wide: add spdx header on all scripts and helpers 2021-01-28 09:55:35 +01:00
meson_options.txt meson: take oomd out of the doghouse 2021-02-02 14:38:19 +01:00
meson.build Move rpm stuff into a separate src/rpm/ directory 2021-02-15 20:49:14 +01:00
mkosi.build meson: Fix update-man-rules when the build dir is not a subdir of the project dir 2021-01-24 17:33:49 +00:00
NEWS NEWS: add a note about no longer probind mmcblk*boot* 2021-02-14 01:30:59 +09:00
README Adding an explanation for CONFIG_NET requirement (#18600) 2021-02-16 16:26:51 +00:00
README.md ci: point the Fossies badge to main 2021-01-21 20:08:44 +01:00
TODO update TODO 2021-02-15 19:23:05 +01:00
zanata.xml po: add basic fedora.zanata.org configuration 2018-02-19 13:56:57 +01:00

README.md

Systemd

System and Service Manager

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Details

Most documentation is available on systemd's web site.

Assorted, older, general information about systemd can be found in the systemd Wiki.

Information about build requirements is 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 guide for information on 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.

Stable branches with backported patches are available in the stable repo.