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# arg 1:  the new package version
# arg 2:  the old package version

post_upgrade() {
  if [ "$(vercmp $2 100)" -lt 0 ]; then
    echo "ATTENTION UDEV:"
    echo "----------"
    echo "udev >=098 rules syntax has changed, please update your own rules."
    echo "udev >=099 Added persistent network and CD/DVD Symlink generator rules."
    echo "Please read the instructions carefully before reboot."
    echo "They are located in /etc/udev/readme-udev-arch.txt"
    echo "----------"
  fi
  if [ "$(vercmp $2 169)" -lt 0 ]; then
    echo "ATTENTION UDEV:"
    echo "---------------"
    echo "Kernel 2.6.32 or newer is now required."
    echo "OSS emulation modules are not loaded by default, add to rc.conf if needed."
    echo "Arch specific cd symlinks are now no longer created."
    echo "cd and net persistent rules will no longer be autogenerated,"
    echo "see <https://wiki.archlinux.org/index.php/Udev> for details."
    echo "Errors are now logged (possibly to the console) by default."
    echo "---------------"
  fi
  if [ "$(vercmp $2 172)" -lt 0 ]; then
    echo "ATTENTION UDEV:"
    echo "---------------"
    echo "Arch's custom blacklisting logic has been removed. MOD_AUTOLOAD and"
    echo "blacklisting in MODULES no longer works."
    echo "See 'man modprobe.conf' for a replacement to blacklisting."
    echo "To disable a module mod1 on the kernel command line, use"
    echo "mod1.disable=1"
    echo "or"
    echo "modprobe.blacklist=mod1"
    echo "  --"
    echo "The following modules are no longer unconditionally loaded:"
    echo "  pcspkr irtty-sir analog lp ppdev ide-generic"
    echo "Add them to MODULES in rc.conf if you need them."
    echo "---------------"
  fi
}

post_install() {
  # If a ramfs is mounted, we still need to make sure that /dev/{console,null,zero} exist
  # The Archlinux installer bind-mounts /dev to /mnt/dev, thus making the real /dev invisible
  ROOTDIR=""
  [ "$(stat -c %D /)" != "$(stat -c %D /dev)" ] && ROOTDIR=$(mktemp -d /tmp/udevinstall.XXXXXX)
  [ -n "${ROOTDIR}" ] && mount --bind / ${ROOTDIR}
  if [ ! -c ${ROOTDIR}/dev/console ]; then
    rm -f ${ROOTDIR}/dev/console
    mknod -m600 ${ROOTDIR}/dev/console c 5 1
  fi
  if [ ! -c ${ROOTDIR}/dev/null ]; then
    rm -f ${ROOTDIR}/dev/null
    mknod -m644 ${ROOTDIR}/dev/null c 1 3
  fi
  if [ ! -c ${ROOTDIR}/dev/zero ]; then
    rm -f ${ROOTDIR}/dev/zero
    mknod -m644 ${ROOTDIR}/dev/zero c 1 5
  fi
  if [ -n "${ROOTDIR}" ]; then
    umount ${ROOTDIR}
    rmdir ${ROOTDIR}
  fi
}