arc-addons/eudev/install.sh

#!/usr/bin/env ash
#
# Copyright (C) 2023 AuxXxilium <https://github.com/AuxXxilium> and Ing <https://github.com/wjz304>
#
# This is free software, licensed under the MIT License.
# See /LICENSE for more information.
#

if [ "${1}" = "early" ]; then
  echo "Installing addon eudev - ${1}"
  tar -zxf /addons/eudev-7.1.tgz -C /
  [ ! -L "/usr/sbin/modinfo" ] && ln -vsf /usr/bin/kmod /usr/sbin/modinfo

elif [ "${1}" = "modules" ]; then
  echo "Installing addon eudev - ${1}"

  # mv -f /usr/lib/udev/rules.d/60-persistent-storage.rules /usr/lib/udev/rules.d/60-persistent-storage.rules.bak
  # mv -f /usr/lib/udev/rules.d/60-persistent-storage-tape.rules /usr/lib/udev/rules.d/60-persistent-storage-tape.rules.bak
  # mv -f /usr/lib/udev/rules.d/80-net-name-slot.rules /usr/lib/udev/rules.d/80-net-name-slot.rules.bak
  [ -e /proc/sys/kernel/hotplug ] && printf '\000\000\000\000' >/proc/sys/kernel/hotplug
  /usr/sbin/depmod -a
  /usr/sbin/udevd -d || {
    echo "FAIL"
    exit 1
  }
  echo "Triggering add events to udev"
  udevadm trigger --type=subsystems --action=add
  udevadm trigger --type=devices --action=add
  udevadm trigger --type=devices --action=change
  udevadm settle --timeout=30 || echo "udevadm settle failed"
  # Give more time
  sleep 10
  # Remove from memory to not conflict with RAID mount scripts
  /usr/bin/killall udevd
  # Remove kvm module
  /usr/sbin/lsmod 2>/dev/null | grep -q ^kvm_intel && /usr/sbin/rmmod kvm_intel || true # kvm-intel.ko
  /usr/sbin/lsmod 2>/dev/null | grep -q ^kvm_amd && /usr/sbin/rmmod kvm_amd || true     # kvm-amd.ko
  /usr/sbin/lsmod 2>/dev/null | grep -q ^kvm && /usr/sbin/rmmod kvm || true
  /usr/sbin/lsmod 2>/dev/null | grep -q ^irqbypass && /usr/sbin/rmmod irqbypass || true

  # getty
  # Find the getty setting in cmdline
  for I in $(cat /proc/cmdline 2>/dev/null | grep -oE 'getty=[^ ]+' | sed 's/getty=//'); do
    TTYN="$(echo "${I}" | cut -d',' -f1)"
    BAUD="$(echo "${I}" | cut -d',' -f2 | cut -d'n' -f1)"
    echo "ttyS0 ttyS1 ttyS2" | grep -qw "${TTYN}" && continue
    if [ -n "${TTYN}" ] && [ -e "/dev/${TTYN}" ]; then
      echo "Starting getty on ${TTYN}"
      if [ -n "${BAUD}" ]; then
        /usr/sbin/getty -L "${TTYN}" "${BAUD}" linux &
      else
        /usr/sbin/getty -L "${TTYN}" linux & 
      fi
    fi
  done

elif [ "${1}" = "late" ]; then
  echo "Installing addon eudev - ${1}"

  [ ! -L "/tmpRoot/usr/sbin/modinfo" ] && ln -vsf /usr/bin/kmod /tmpRoot/usr/sbin/modinfo
  [ ! -L "/tmpRoot/usr/sbin/depmod" ] && ln -vsf /usr/bin/kmod /tmpRoot/usr/sbin/depmod

  echo "copy modules"
  isChange="false"
  export LD_LIBRARY_PATH=/tmpRoot/bin:/tmpRoot/lib
  /tmpRoot/bin/cp -rnf /usr/lib/firmware/* /tmpRoot/usr/lib/firmware/
  if cat /proc/version 2>/dev/null | grep -q 'RR@RR'; then
    if [ -d /tmpRoot/usr/lib/modules.bak ]; then
      /tmpRoot/bin/rm -rf /tmpRoot/usr/lib/modules
      /tmpRoot/bin/cp -rf /tmpRoot/usr/lib/modules.bak /tmpRoot/usr/lib/modules
    else
      echo "Custom - backup modules."
      /tmpRoot/bin/cp -rf /tmpRoot/usr/lib/modules /tmpRoot/usr/lib/modules.bak
    fi
    /tmpRoot/bin/cp -rf /usr/lib/modules/* /tmpRoot/usr/lib/modules
    echo "true" >/tmp/modulesChange
  else
    if [ -d /tmpRoot/usr/lib/modules.bak ]; then
      echo "Custom - restore modules from backup."
      /tmpRoot/bin/rm -rf /tmpRoot/usr/lib/modules
      /tmpRoot/bin/mv -rf /tmpRoot/usr/lib/modules.bak /tmpRoot/usr/lib/modules
    fi
    cat /addons/modulelist 2>/dev/null | /tmpRoot/bin/sed '/^\s*$/d' | while IFS=' ' read -r O M; do
      [ "${O:0:1}" = "#" ] && continue
      [ -z "${M}" -o -z "$(ls /usr/lib/modules/${M} 2>/dev/null)" ] && continue
      if [ "${O^^}" = "F" ]; then
        /tmpRoot/bin/cp -vrf /usr/lib/modules/${M} /tmpRoot/usr/lib/modules/
      else
        /tmpRoot/bin/cp -vrn /usr/lib/modules/${M} /tmpRoot/usr/lib/modules/
      fi
      # isChange="true"
      # In Bash, the pipe operator | creates a subshell to execute the commands in the pipe.
      # This means that if you modify a variable inside a while loop,
      # the modification is not visible outside the loop because the while loop is executed in a subshell.
      echo "true" >/tmp/modulesChange
    done
  fi
  isChange="$(cat /tmp/modulesChange 2>/dev/null || echo "false")"
  echo "isChange: ${isChange}"
  [ "${isChange}" = "true" ] && /usr/sbin/depmod -a -b /tmpRoot

  # Restore kvm module
  /usr/sbin/insmod /usr/lib/modules/irqbypass.ko || true
  /usr/sbin/insmod /usr/lib/modules/kvm.ko || true
  /usr/sbin/insmod /usr/lib/modules/kvm-intel.ko || true # kvm-intel.ko
  /usr/sbin/insmod /usr/lib/modules/kvm-amd.ko || true   # kvm-amd.ko

  echo "Copy rules"
  cp -vf /usr/lib/udev/rules.d/* /tmpRoot/usr/lib/udev/rules.d/
  #echo "Copy hwdb"
  #cp -vf /etc/udev/hwdb.d/* /tmpRoot/usr/lib/udev/hwdb.d/

  mkdir -p "/tmpRoot/usr/lib/systemd/system"
  DEST="/tmpRoot/usr/lib/systemd/system/udevrules.service"
  echo "[Unit]"                                                                  >${DEST}
  echo "Description=Reload udev rules"                                          >>${DEST}
  echo                                                                          >>${DEST}
  echo "[Service]"                                                              >>${DEST}
  echo "Type=oneshot"                                                           >>${DEST}
  echo "RemainAfterExit=yes"                                                    >>${DEST}
  echo "ExecStart=/usr/bin/udevadm hwdb --update"                               >>${DEST}
  echo "ExecStart=/usr/bin/udevadm control --reload-rules"                      >>${DEST}
  echo                                                                          >>${DEST}
  echo "[Install]"                                                              >>${DEST}
  echo "WantedBy=multi-user.target"                                             >>${DEST}

  mkdir -vp /tmpRoot/usr/lib/systemd/system/multi-user.target.wants
  ln -vsf /usr/lib/systemd/system/udevrules.service /tmpRoot/usr/lib/systemd/system/multi-user.target.wants/udevrules.service
fi