mirror of
https://github.com/systemd/systemd
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a24c64f03f
Previously all journal files were owned by "adm". In order to allow specific users to read the journal files without granting it access to the full "adm" powers, introduce a new specific group for this. "systemd-journal" has to be created by the packaging scripts manually at installation time. It's a good idea to assign a static UID/GID to this group, since /var/log/journal might be shared across machines via NFS. This commit also grants read access to the journal files by default to members of the "wheel" and "adm" groups via file system ACLs, since these "almost-root" groups should be able to see what's going on on the system. These ACLs are created by "make install". Packagers probably need to duplicate this logic in their postinst scripts. This also adds documentation how to grant access to the journal to additional users or groups via fs ACLs.
139 lines
4.9 KiB
Plaintext
139 lines
4.9 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 GPLv2.0+
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REQUIREMENTS:
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Linux kernel >= 2.6.39
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with devtmpfs
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with cgroups (but it's OK to disable all controllers)
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optional but strongly recommended: autofs4, ipv6
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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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For systmed-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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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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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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During runtime the journal daemon requires the
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"system-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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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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