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Backports of patch from systemd git to stable distributions
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Jason A. Donenfeld ffa047a03e random-util: remove RDRAND usage 
/dev/urandom is seeded with RDRAND. Calling genuine_random_bytes(...,
..., 0) will use /dev/urandom as a last resort. Hence, we gain nothing
here by having our own RDRAND wrapper, because /dev/urandom already is
based on RDRAND output, even before /dev/urandom has fully initialized.

Furthermore, RDRAND is not actually fast! And on each successive
generation of new x86 CPUs, from both AMD and Intel, it just gets
slower.

This commit simplifies things by just using /dev/urandom in cases where
we before might use RDRAND, since /dev/urandom will always have RDRAND
mixed in as part of it.

And above where I say "/dev/urandom", what I actually mean is
GRND_INSECURE, which is the same thing but won't generate warnings in
dmesg.
2022-03-14 19:47:13 +00:00
.clusterfuzzlite ci: merge seed corpora with public OSS-Fuzz corpora on CFLite 2022-01-30 10:17:25 +00:00
.github ci: make the concurrency group identifier unique once again 2022-03-07 19:42:14 +00:00
.lgtm/cpp-queries ci: pack-ify our custom CodeQL queries and enable them in Actions 2021-12-07 14:57:09 +01:00
.semaphore test: check systemd RPM macros 2022-03-06 13:07:20 +09:00
catalog meson: do not use split() in file lists 2022-03-02 14:49:32 +01:00
coccinelle coccinelle: automatically look for timestamp_is_set candidates 2022-02-22 22:47:12 +01:00
docs random-util: remove RDRAND usage 2022-03-14 19:47:13 +00:00
factory factory/locale.conf: mention systemd ownership 2021-12-23 14:18:02 +00:00
hwdb.d Fix mic mute on Acer TravelMate B311-31 (#22677) 2022-03-08 23:10:51 +09:00
LICENSES network: license all config files as CC0 2022-01-12 16:05:59 +01:00
man man: replace full stop with colon 2022-03-13 18:30:57 +00:00
mkosi.default.d mkosi: Add centos_epel config 2022-02-25 16:17:29 +00:00
modprobe.d meson: install the right README file in modprobe.d 2021-07-07 14:52:05 +02:00
network network: add example file that enables DHCP on ethernet links 2022-01-12 16:05:59 +01:00
po po: Translated using Weblate (Georgian) 2022-03-10 18:45:50 +00:00
presets units: enable systemd-network-generator by default 2021-12-16 09:49:39 +01:00
rules.d udev: 60-persistent-storage-tape.rules: handle duplicate device ID 2022-03-08 23:12:10 +09:00
shell-completion bus-dump: change capture output to use pcapng (#21738) 2021-12-25 15:07:40 +09:00
src random-util: remove RDRAND usage 2022-03-14 19:47:13 +00:00
sysctl.d build: preserve correct mode when generating files via jinja2 2021-11-08 12:06:48 +00:00
sysusers.d sysusers: avoid creating spurious "nobody" group 2021-11-30 16:16:25 +01:00
test Merge pull request #22714 from mrc0mmand/codeql-docs 2022-03-11 19:03:38 +00:00
tmpfiles.d factory: populate /etc/locale.conf with systemd build-time setting 2021-12-23 11:01:12 +00:00
tools docs: swap Name and Partition Type UUID in header 2022-02-21 02:46:57 +01:00
units units: drop After=systemd-resolved.service from systemd-nspawn@.service 2022-02-24 10:37:11 +01:00
xorg xorg/50-systemd-user: add a full license header 2021-10-01 14:45:00 +02:00
.clang-format clang-format: we actually typically use 16ch continuation indentation 2022-02-22 17:32:50 +01:00
.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: set maximum line length to 109 for man/*.xml files 2021-09-30 13:45:34 +02:00
.gitattributes gitattributes: introduce and use "generated" attribute 2021-10-18 09:42:55 +02:00
.gitignore gitignore: ignore mkosi.installdir 2022-03-11 09:34:04 +00:00
.lgtm.yml lgtm: disable cpp/missing-return 2022-03-11 17:19:32 +09:00
.mailmap mailmap: two more names 2021-03-30 13:17:58 +02:00
.packit.yml Packit: build SRPMs in Copr 2022-03-09 09:52:41 +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 tools: shellcheck-ify tool scripts 2021-09-30 12:27:06 +02:00
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: allow skipping optional dependencies 2022-02-22 11:17:21 +00:00
meson.build meson: move to c_std=gnu11 2022-03-11 15:13:29 +09:00
mkosi.build ci: check for failed services after boot 2021-12-10 10:25:43 +01:00
mkosi.postinst ci: check for failed services after boot 2021-12-10 10:25:43 +01:00
NEWS random-util: remove RDRAND usage 2022-03-14 19:47:13 +00:00
README meson: Drop required libfdisk version to 2.32 2022-02-24 20:06:55 +00:00
README.md Fix loading of graphs 2021-12-14 15:27:25 +09:00
TODO update TODO 2022-03-09 14:25:43 +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 Code Map for information about this repository's layout and content.

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.