8.89. Udev from Systemd-257.3

8.89.1. Installation of Udev

Udev is part of the systemd-257.3 package. Use the systemd-257.3.tar.xz file as the source tarball.

Create the PKGBUILD for the Udev package with the following commands:

mkdir /sources/udev
cd /sources/udev
cat > PKGBUILD << "REALEOF"
# Maintainer: Linux From Scratch <lfs-dev@lists.linuxfromscratch.org>

pkgname="udev"
_pkgbase="systemd"
pkgver="257.3"
pkgrel="1"
pkgdesc="The Udev package contains programs for dynamic creation of device nodes."
arch=('x86'
      'x86_64')
url="https://www.freedesktop.org/wiki/Software/systemd/"
license=('BSD2C'
         'BSD3C'
         'CCU-1'
         'GLPv2'
         'LGPLv2.1'
         'MIT'
         'PD'
         'OFL')
install='udev.install'
groups=('core')
depends=('acl'
         'glibc'
         'libcap'
         'openssl'
         'util-linux')
makedepends=('bash'
             'binutils'
             'coreutils'
             'diffutils'
             'gawk'
             'gcc'
             'gperf'
             'grep'
             'jinja2'
             'libxcrypt'
             'meson'
             'pkgconf'
             'sed'
             'zstd')
source=('https://github.com/systemd/systemd/archive/v257.3/systemd-257.3.tar.gz'
        'https://anduin.linuxfromscratch.org/LFS/systemd-man-pages-257.3.tar.xz'
        'https://anduin.linuxfromscratch.org/LFS/udev-lfs-20230818.tar.xz')
md5sums=('8e4fc90c7aead651fa5c50bd1b34abc2'
         '9b77c3b066723d490cb10aed4fb05696'
         'acd4360d8a5c3ef320b9db88d275dae6')
noextract=('systemd-man-pages-257.3.tar.xz'
           'udev-lfs-20230818.tar.xz')
prepare(){
  cd "${_pkgbase}-${pkgver}"
  # Remove two unneeded groups, render and sgx, from the default udev rules
  sed -e 's/GROUP="render"/GROUP="video"/' \
      -e 's/GROUP="sgx", //'               \
      -i rules.d/50-udev-default.rules.in

  # Remove one udev rule requiring a full Systemd installation
  sed -i '/systemd-sysctl/s/^/#/' rules.d/99-systemd.rules.in

  # Adjust the hardcoded paths to network configuration files for the
  # standalone udev installation
  sed -e '/NETWORK_DIRS/s/systemd/udev/' \
      -i src/libsystemd/sd-network/network-util.h

  # Build udev in its own directory
  mkdir -p build
}

build(){
  cd "${_pkgbase}-${pkgver}/build"
  meson setup ..                  \
        --prefix=/usr             \
        --buildtype=release       \
        -D mode=release           \
        -D dev-kvm-mode=0660      \
        -D link-udev-shared=false \
        -D logind=false           \
        -D vconsole=false
  # Get the list of the shipped udev helpers and save it into a variable
  _udev_helpers=$(grep "'name' :" ../src/udev/meson.build | \
                  awk '{print $3}' | tr -d ",'" | grep -v 'udevadm')

  # Build the package
  ninja udevadm systemd-hwdb                                           \
        $(ninja -n | grep -Eo '(src/(lib)?udev|rules.d|hwdb.d)/[^ ]*') \
        $(realpath libudev.so --relative-to .)                         \
        ${_udev_helpers}
}

package(){
  cd "${_pkgbase}-${pkgver}/build"

  # Get the list of the shipped udev helpers and save it into a variable
  _udev_helpers=$(grep "'name' :" ../src/udev/meson.build | \
                  awk '{print $3}' | tr -d ",'" | grep -v 'udevadm')

  # Install only what is needed from the systemd package for udev
  install -vDm755 -d "${pkgdir}"{/usr/lib,/etc}/udev/{hwdb.d,rules.d,network}
  install -vDm755 -d "${pkgdir}"/usr/{lib,share}/pkgconfig
  install -vDm755 udevadm                             "${pkgdir}/usr/bin/"
  install -vDm755 systemd-hwdb                        "${pkgdir}/usr/bin/udev-hwdb"
  install -vdm755 "${pkgdir}"/usr/sbin
  ln      -svfn   ../bin/udevadm                      "${pkgdir}/usr/sbin/udevd"
  cp      -av     libudev.so{,*[0-9]}                 "${pkgdir}/usr/lib/"
  install -vDm644 ../src/libudev/libudev.h            "${pkgdir}/usr/include/"
  install -vDm644 src/libudev/*.pc                    "${pkgdir}/usr/lib/pkgconfig/"
  install -vDm644 src/udev/*.pc                       "${pkgdir}/usr/share/pkgconfig/"
  install -vDm644 ../src/udev/udev.conf               "${pkgdir}/etc/udev/"
  install -vDm644 rules.d/* ../rules.d/README         "${pkgdir}/usr/lib/udev/rules.d/"
  install -vDm644 $(find ../rules.d/*.rules \
                         -not -name '*power-switch*') "${pkgdir}/usr/lib/udev/rules.d/"
  install -vDm644 hwdb.d/*  ../hwdb.d/{*.hwdb,README} "${pkgdir}/usr/lib/udev/hwdb.d/"
  install -vDm755 ${_udev_helpers}                    "${pkgdir}/usr/lib/udev"
  install -vDm644 ../network/99-default.link          "${pkgdir}/usr/lib/udev/network"

  # Install the LFS custom rules and support files
  tar -xvf "${srcdir}/udev-lfs-20230818.tar.xz"
  make -f udev-lfs-20230818/Makefile.lfs DESTDIR="${pkgdir}" install

  # Install the man pages
  tar -xf "${srcdir}/systemd-man-pages-257.3.tar.xz                     \
      --no-same-owner --strip-components=1                              \
      -C "${pkgdir}/usr/share/man" --wildcards '*/udev*' '*/libudev*'   \
                                    '*/systemd.link.5'                  \
                                    '*/systemd-'{hwdb,udevd.service}.8

  sed 's|systemd/network|udev/network|'                                 \
      "${pkgdir}/usr/share/man/man5/systemd.link.5"                     \
    > "${pkgdir}/usr/share/man/man5/udev.link.5"

  sed 's/systemd\(\\\?-\)/udev\1/'                                      \
      "${pkgdir}/usr/share/man/man8/systemd-hwdb.8"                     \
    > "${pkgdir}/usr/share/man/man8/udev-hwdb.8"

  sed 's|lib.*udevd|sbin/udevd|'                                        \
      "${pkgdir}/usr/share/man/man8/systemd-udevd.service.8"            \
    > "${pkgdir}/usr/share/man/man8/udevd.8"

  rm "${pkgdir}"/usr/share/man/man*/systemd*
}
REALEOF

Create the udev.install file to run the udev-hwdb update on installation or upgrade:

cat > udev.install << "REALEOF"
# udev.install

post_install(){
  /usr/bin/udev-hwdb update
}

post_upgrade(){
  /usr/bin/udev-hwdb update
}

REALEOF

Prepare the build directory for the pacman user and build the package:

chown -R root:pacman .
chmod 2775 .
chmod 664 PKGBUILD
su pacman -c 'makepkg -L --nodeps'

Add the newly created package to the central package repository:

cp udev-257.3-1-$(uname -m).pkg.tar.xz \
   /srv/pacman/repos/LFS/
repo-add /srv/pacman/repos/LFS/LFS.db.tar.xz \
         /srv/pacman/repos/LFS/udev-257.3-1-$(uname -m).pkg.tar.xz

Update the local cache and install the Udev package:

pacman -Syu
pacman -S udev --overwrite \* -dd --noconfirm

Finally, copy the source files into the source repository and clean up the build directory:

mkdir /srv/pacman/source/LFS/udev
cp PKGBUILD /srv/pacman/source/LFS/udev
cd /sources
rm -rf udev

udev-hwdb update