8.74.1. Installation of Udev
Udev is part of the systemd-254 package. Use the systemd-254.tar.xz
file as the source tarball.
Remove two unneeded groups, render
and sgx, from the default udev
rules:
sed -i -e 's/GROUP="render"/GROUP="video"/' \
-e 's/GROUP="sgx", //' rules.d/50-udev-default.rules.in
Remove one udev rule requiring a full Systemd installation:
sed '/systemd-sysctl/s/^/#/' -i rules.d/99-systemd.rules.in
Prepare Udev for compilation:
mkdir -p build
cd build
meson setup \
--prefix=/usr \
--buildtype=release \
-Dmode=release \
-Ddev-kvm-mode=0660 \
-Dlink-udev-shared=false \
..
The meaning of the meson options:
-
--buildtype=release
-
This switch overrides the default buildtype (“debug”), which produces
unoptimized binaries.
-
-Dmode=release
-
Disable some features considered experimental by upstream.
-
-Ddev-kvm-mode=0660
-
The default udev rule would allow all users to access
/dev/kvm. The editors consider
it dangerous. This option overrides it.
-
-Dlink-udev-shared=false
-
This option prevents udev from linking to the internal
systemd shared library, libsystemd-shared. This library is
designed to be shared by many Systemd components and it's too
overkill for a udev-only installation.
Only build the components needed for udev:
ninja udevadm systemd-hwdb \
$(grep -o -E "^build (src/libudev|src/udev|rules.d|hwdb.d)[^:]*" \
build.ninja | awk '{ print $2 }') \
$(realpath libudev.so --relative-to .)
Remove one udev rule file requiring a full Systemd installation:
rm rules.d/90-vconsole.rules
Install the package:
install -vm755 -d {/usr/lib,/etc}/udev/{hwdb,rules}.d
install -vm755 -d /usr/{lib,share}/pkgconfig
install -vm755 udevadm /usr/bin/
install -vm755 systemd-hwdb /usr/bin/udev-hwdb
ln -svfn ../bin/udevadm /usr/sbin/udevd
cp -av libudev.so{,*[0-9]} /usr/lib/
install -vm644 ../src/libudev/libudev.h /usr/include/
install -vm644 src/libudev/*.pc /usr/lib/pkgconfig/
install -vm644 src/udev/*.pc /usr/share/pkgconfig/
install -vm644 ../src/udev/udev.conf /etc/udev/
install -vm644 rules.d/* ../rules.d/{*.rules,README} /usr/lib/udev/rules.d/
install -vm644 hwdb.d/* ../hwdb.d/{*.hwdb,README} /usr/lib/udev/hwdb.d/
install -vm755 $(find src/udev -type f | grep -F -v ".") /usr/lib/udev
Install some custom rules and support files useful in an LFS
environment:
tar -xvf ../../udev-lfs-20230818.tar.xz
make -f udev-lfs-20230818/Makefile.lfs install
Install the man pages:
tar -xf ../../systemd-man-pages-254.tar.xz \
--no-same-owner --strip-components=1 \
-C /usr/share/man --wildcards '*/udev*' '*/libudev*' \
'*/systemd-'{hwdb,udevd.service}.8
sed 's/systemd\(\\\?-\)/udev\1/' /usr/share/man/man8/systemd-hwdb.8 \
> /usr/share/man/man8/udev-hwdb.8
sed 's|lib.*udevd|sbin/udevd|' \
/usr/share/man/man8/systemd-udevd.service.8 \
> /usr/share/man/man8/udevd.8
rm /usr/share/man/man8/systemd-*.8