elogind is the systemd project's "logind", extracted to be a
standalone daemon. It integrates with Linux-PAM-1.5.3 to track all the users logged
in to a system, and whether they are logged in graphically, on the
console, or remotely. Elogind
exposes this information via the standard org.freedesktop.login1
D-Bus interface, and also through
the file system using systemd's standard /run/systemd layout.
![[注記]](../images/note.png)
LFS や依存パッケージが本ブックに示す最新安定バージョンでなかった場合には、BLFS 開発版においては、パッケージのビルドや処理実行が適切に行われないことがあります。
ダウンロード (HTTP): https://github.com/elogind/elogind/archive/v252.9/elogind-252.9.tar.gz
ダウンロード MD5 sum: 2be2c43298e2fc41c5bee33dde605f01
ダウンロードサイズ: 1.8 MB
必要ディスク容量: 45 MB (with tests)
概算ビルド時間: 0.3 SBU (with parallelism=4)
dbus-1.14.10 (runtime), Linux-PAM-1.5.3 (required for Xorg), Polkit-123 (runtime), docbook-xml-4.5, docbook-xsl-nons-1.79.2, and libxslt-1.1.39 (all three to build the man pages)
lxml-4.9.4, zsh-5.9, Valgrind-3.22.0 (needed for tests), audit-userspace, bash-completion, kexec, and SELinux
Editor Notes: https://wiki.linuxfromscratch.org/blfs/wiki/Logind
Enable the following options in the kernel configuration and recompile the kernel if necessary:
File systems ---> [*] Inotify support for userspace [INOTIFY_USER] Pseudo filesystems ---> [*] Tmpfs virtual memory file system support (former shm fs) [TMPFS] [*] Tmpfs POSIX Access Control Lists [TMPFS_POSIX_ACL]
In addition, some tests need the userspace cryptographic kernel API, which is enabled with:
-*- Cryptographic API ---> [CRYPTO] Crypto core or helper ---> <*/M> Userspace cryptographic algorithm configuration [CRYPTO_USER] Userspace interface ---> <*/M> Hash algorithms [CRYPTO_USER_API_HASH]
Install elogind by running the following commands:
mkdir build &&
cd build &&
meson setup .. \
--prefix=/usr \
--buildtype=release \
-Dman=auto \
-Ddocdir=/usr/share/doc/elogind-252.9 \
-Dcgroup-controller=elogind \
-Ddev-kvm-mode=0660 \
-Ddbuspolicydir=/etc/dbus-1/system.d &&
ninja
To test the results, issue: ninja
test. A few tests are skipped if not run with
root privileges. Two tests named
test-fs-util and test-id128 require the /etc/machine-id symlink, so they will fail if
this symlink is not created following the instruction in dbus-1.14.10 yet.
Now, as the root user:
ninja install && ln -sfv libelogind.pc /usr/lib/pkgconfig/libsystemd.pc && ln -sfvn elogind /usr/include/systemd
-Ddocdir=/usr/share/doc/elogind-252.9:
This is needed to install documentation in a versioned directory.
-Dcgroup-controller=elogind: This
switch is necessary to build this package when the kernel is not
built with CONFIG_CGROUPS enabled. Note
that elogind strictly needs a
kernel with CONFIG_CGROUPS enabled at
runtime, but this switch will allow building the package first.
-Ddbuspolicydir=/etc/dbus-1/system.d:
This switch sets the location of the D-Bus policy directory.
-Ddev-kvm-mode=0660: The
LFS udev rule sets the mode of /dev/kvm to 0660. This option ensures the elogind
udev rules consistent with the LFS configuration.
-Dman=auto: The default
value of this switch is false. Setting it to auto allows building and installing the
man pages if the recommended dependencies are installed.
-Dhtml=auto: The default value of this
switch is false. Setting it
to auto allows building and
installing the html documentation if the recommended dependencies
are installed.
-Ddefault-kill-user-processes=false:
Determines whether the processes of a user should be killed when
the user logs out. The default is true, but this defeats the traditional
use of screen or
tmux. This can also
be changed in the configuration file (see below).
ln -s ...: These commands install symlinks so that software packages can find the systemd-compatible library and headers.
The installed file /etc/elogind/logind.conf contains all the
possible options with their defaults, commented out. You may wish
to disable automatically killing user processes when the user
logs out, by running, as the root
user:
sed -e '/\[Login\]/a KillUserProcesses=no' \
-i /etc/elogind/logind.conf
Each user will need to register a user session using Linux-PAM at login. The /etc/pam.d/system-session file needs to be
modified and a new file must be created in order for elogind to work correctly. Run
the following commands as the root user:
cat >> /etc/pam.d/system-session << "EOF" &&# Begin elogind addition session required pam_loginuid.so session optional pam_elogind.so # End elogind additionEOF cat > /etc/pam.d/elogind-user << "EOF"# Begin /etc/pam.d/elogind-user account required pam_access.so account include system-account session required pam_env.so session required pam_limits.so session required pam_unix.so session required pam_loginuid.so session optional pam_keyinit.so force revoke session optional pam_elogind.so auth required pam_deny.so password required pam_deny.so # End /etc/pam.d/elogind-userEOF