mirror of
https://github.com/systemd/systemd.git
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186 lines
6.4 KiB
Plaintext
186 lines
6.4 KiB
Plaintext
systemd System and Service Manager
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DETAILS:
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http://0pointer.de/blog/projects/systemd.html
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WEB SITE:
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http://www.freedesktop.org/wiki/Software/systemd
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GIT:
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git://anongit.freedesktop.org/systemd/systemd
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ssh://git.freedesktop.org/git/systemd/systemd
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GITWEB:
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http://cgit.freedesktop.org/systemd/systemd
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MAILING LIST:
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http://lists.freedesktop.org/mailman/listinfo/systemd-devel
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http://lists.freedesktop.org/mailman/listinfo/systemd-commits
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IRC:
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#systemd on irc.freenode.org
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BUG REPORTS:
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https://bugs.freedesktop.org/enter_bug.cgi?product=systemd
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AUTHOR:
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Lennart Poettering
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Kay Sievers
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...and many others
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LICENSE:
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LGPLv2.1+ for all code
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- except sd-daemon.[ch] and sd-readahead.[ch] which are MIT
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- except src/udev/ which is (currently still) GPLv2+
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REQUIREMENTS:
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Linux kernel >= 2.6.39
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CONFIG_DEVTMPFS
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CONFIG_CGROUPS (it's OK to disable all controllers)
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CONFIG_INOTIFY_USER
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CONFIG_SIGNALFD
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CONFIG_TIMERFD
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CONFIG_EPOLL
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CONFIG_NET
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CONFIG_SYSFS
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Linux kernel >= 3.8 for Smack support
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Udev will fail to work with the legacy layout:
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CONFIG_SYSFS_DEPRECATED=n
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Legacy hotplug slows down the system and confuses udev:
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CONFIG_UEVENT_HELPER_PATH=""
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Userspace firmware loading is deprecated, will go away, and
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sometimes causes problems:
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CONFIG_FW_LOADER_USER_HELPER=n
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Some udev rules and virtualization detection relies on it:
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CONFIG_DMIID
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Mount and bind mount handling might require it:
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CONFIG_FHANDLE
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Optional but strongly recommended:
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CONFIG_IPV6
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CONFIG_AUTOFS4_FS
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CONFIG_TMPFS_POSIX_ACL
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CONFIG_TMPFS_XATTR
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CONFIG_SECCOMP
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For systemd-bootchart a kernel with procfs support and several
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proc output options enabled is required:
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CONFIG_PROC_FS
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CONFIG_SCHEDSTATS
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CONFIG_SCHED_DEBUG
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For UEFI systems:
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CONFIG_EFI_VARS
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CONFIG_EFI_PARTITION
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dbus >= 1.4.0
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libcap
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libblkid >= 2.20 (from util-linux) (optional)
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libkmod >= 5 (optional)
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PAM >= 1.1.2 (optional)
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libcryptsetup (optional)
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libaudit (optional)
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libacl (optional)
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libattr (optional)
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libselinux (optional)
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liblzma (optional)
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tcpwrappers (optional)
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libgcrypt (optional)
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libqrencode (optional)
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libmicrohttpd (optional)
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libpython (optional)
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make, gcc, and similar tools
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During runtime you need the following additional dependencies:
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util-linux >= v2.19 (requires fsck -l, agetty -s)
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sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
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dracut (optional)
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PolicyKit (optional)
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When building from git you need the following additional dependencies:
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docbook-xsl
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xsltproc
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automake
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autoconf
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libtool
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intltool
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gperf
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gtkdocize (optional)
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python (optional)
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sphinx (optional)
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python-lxml (entirely optional)
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When systemd-hostnamed is used it is strongly recommended to
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install nss-myhostname to ensure that in a world of
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dynamically changing hostnames the hostname stays resolvable
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under all circumstances. In fact, systemd-hostnamed will warn
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if nss-myhostname is not installed.
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Note that D-Bus can link against libsystemd-login.so, which
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results in a cyclic build dependency. To accommodate for this
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please build D-Bus without systemd first, then build systemd,
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then rebuild D-Bus with systemd support.
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To build HTML documentation for python-systemd using sphinx,
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please first install systemd (using 'make install'), and then
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invoke sphinx-build with 'make sphinx-<target>', with <target>
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being 'html' or 'latexpdf'. If using DESTDIR for installation,
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pass the same DESTDIR to 'make sphinx-html' invocation.
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USERS AND GROUPS:
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Default udev rules use the following standard system group
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names, which need to be resolvable by getgrnam() at any time,
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even in the very early boot stages, where no other databases
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and network are available:
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tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
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During runtime the journal daemon requires the
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"systemd-journal" system group to exist. New journal files will
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be readable by this group (but not writable) which may be used
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to grant specific users read access.
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It is also recommended to grant read access to all journal
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files to the system groups "wheel" and "adm" with a command
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like the following in the post installation script of the
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package:
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# setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
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The journal gateway daemon requires the
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"systemd-journal-gateway" system user and group to
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exist. During execution this network facing service will drop
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privileges and assume this uid/gid for security reasons.
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WARNINGS:
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systemd will warn you during boot if /etc/mtab is not a
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symlink to /proc/mounts. Please ensure that /etc/mtab is a
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proper symlink.
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systemd will warn you during boot if /usr is on a different
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file system than /. While in systemd itself very little will
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break if /usr is on a separate partition many of its
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dependencies very likely will break sooner or later in one
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form or another. For example udev rules tend to refer to
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binaries in /usr, binaries that link to libraries in /usr or
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binaries that refer to data files in /usr. Since these
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breakages are not always directly visible systemd will warn
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about this, since this kind of file system setup is not really
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supported anymore by the basic set of Linux OS components.
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For more information on this issue consult
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http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
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To run systemd under valgrind, compile with VALGRIND defined
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(e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
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false positives will be triggered by code which violates
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some rules but is actually safe.
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