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NeilBrown 83897d5470 core/mount: pass "-c" flag to /bin/umount (#6093) 
"-c", which is short for "--no-canonicalize", tells /bin/umount
that the path name is canonical (no .. or symlinks etc).

systemd always uses a canonical name, so this flag is appropriate
for systemd to use.
Knowing that the path is canonical allows umount to avoid
some calls to lstat() on the path.

From v2.30 "-c" goes further and causes umount to avoid all
attempts to 'lstat()' (or similar) the path.  This is important
when automatically unmounting a filesystem, as lstat() can
hang indefinitely in some cases such as when an NFS server
is not accessible.

"-c" has been supported since util-linux 2.17 which is before the
earliest version supported by systemd.
So "-c" is safe to use now, and once util-linux v2.30 is in use,
it will allow mounts from non-responsive NFS servers to be
unmounted.
2017-06-07 15:28:23 +03:00
.github github: comment out submitter note in ISSUE_TEMPLATE 2017-05-22 16:07:28 +03:00
.mkosi mkosi: update Debian config for mkosi (#6089) 2017-06-06 10:52:52 -04:00
catalog meson: reindent all files with 8 spaces 2017-04-23 21:47:29 -04:00
coccinelle tree-wide: drop NULL sentinel from strjoin 2016-10-23 11:43:27 -04:00
docs meson: use booleans for conf.set and drop unecessary conditionals 2017-05-02 16:29:11 -04:00
factory/etc factory: remove broken pam_limits 2014-07-30 15:21:54 +02:00
hwdb hwdb: add multimedia keys for Medion Akoya S3409 (#6062) 2017-06-01 12:16:32 +02:00
m4 build-sys: Perform flag tests in context to existing flags 2016-02-06 14:57:46 +01:00
man Merge pull request #6058 from keszybz/chrooted-test-fixes 2017-06-01 09:37:13 +02:00
network meson: use booleans for conf.set and drop unecessary conditionals 2017-05-02 16:29:11 -04:00
po l10n: update Czech Translation (#6090) 2017-06-06 11:52:25 -04:00
rules rules: watch metadata changes in mmcblk devices (#6050) 2017-05-30 15:19:03 +02:00
shell-completion zsh: add completion for add-wants and add-requires (#6082) 2017-06-06 21:32:15 -04:00
src core/mount: pass "-c" flag to /bin/umount (#6093) 2017-06-07 15:28:23 +03:00
sysctl.d meson: use booleans for conf.set and drop unecessary conditionals 2017-05-02 16:29:11 -04:00
system-preset units: make enablement of s-n-wait-online.service follow systemd-networkd.service (#5635) 2017-03-27 12:55:55 +02:00
sysusers.d meson: use booleans for conf.set and drop unecessary conditionals 2017-05-02 16:29:11 -04:00
test test: ensure 'InaccessiblePaths=/proc' option works (#6017) 2017-05-25 07:47:08 +03:00
tmpfiles.d build: *really* install tmpfiles.d/systemd-remote.conf when necessary (#6061) 2017-05-31 09:44:08 -04:00
tools Mark python scripts executable 2017-05-07 20:16:47 -04:00
units systemd-nspawn@.service: start after /var/lib/machines is mounted (#6079) 2017-06-06 11:18:22 -04:00
xorg login: support user-bus on dbus1 2015-08-31 18:12:37 +02:00
.dir-locals.el meson: also indent scripts with 8 spaces 2017-04-25 08:49:16 -04:00
.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 test-timesync: add first test for timesyncd conf parsing 2017-05-25 10:59:35 -04:00
.mailmap mailmap: add entries for recent commits from github 2017-05-30 21:36:27 -04:00
.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 tree-wide: set SA_RESTART for signal handlers we install 2016-12-01 12:41:17 +01:00
configure.ac tmpfiles: Remove unnecessary utmp file creation (#6006) 2017-05-24 11:10:59 +02:00
DISTRO_PORTING It's now ok to use Google NTP servers (#5311) 2017-02-12 00:30:40 -05:00
ENVIRONMENT.md Rename $TEST_DIR to $SYSTEMD_TEST_DATA, document it 2017-02-16 21:36:31 +01:00
HACKING HACKING: mkosi is now packaged for Fedora 2017-02-14 23:56:48 -05:00
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 build-sys: re-add systemd.directives and systemd.index to MANPAGES (#5876) 2017-05-02 15:30:14 -04:00
Makefile.am build: *really* install tmpfiles.d/systemd-remote.conf when necessary (#6061) 2017-05-31 09:44:08 -04:00
meson_options.txt Merge pull request #5928 from keszybz/libidn2 2017-05-12 12:01:40 +02:00
meson.build meson: output TAGS file in source not build directory 2017-05-30 21:36:27 -04:00
mkosi.build mkosi.build: set encoding 2017-05-05 21:19:04 -04:00
mkosi.default mkosi: create .mkosi directory 2016-10-06 11:53:58 -04:00
NEWS kernel-install: support the case /etc/machine-id is missing or empty (#5975) 2017-05-30 09:45:10 -04:00
README Merge pull request #5928 from keszybz/libidn2 2017-05-12 12:01:40 +02:00
README.md README: include small graphs of open issues and pull requests (#5576) 2017-03-13 08:10:04 +01:00
TODO update TODO 2017-04-24 18:48:10 +02:00

README.md

systemd - System and Service Manager

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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.