gen_bootloader.sh

   1 set_bootloader() {
   2         case "${BOOTLOADER}" in
   3                 grub)
   4                         set_bootloader_grub
   5                         ;;
   6                 *)
   7                         print_warning "Bootloader ${BOOTLOADER} is not currently supported"
   8                         ;;
   9         esac
  10 }
  11
  12 set_bootloader_read_fstab() {
  13         local ROOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "/" ) { print $1; exit }' /etc/fstab)
  14         local BOOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "'${BOOTDIR}'") { print $1; exit }' /etc/fstab)
  15
  16         # If ${BOOTDIR} is not defined in /etc/fstab, it must be the same as /
  17         [ -z "${BOOTFS}" ] && BOOTFS=${ROOTFS}
  18
  19         echo "${ROOTFS} ${BOOTFS}"
  20 }
  21
  22 set_bootloader_grub_read_device_map() {
  23         # Read GRUB device map
  24         [ ! -d ${TEMP} ] && mkdir ${TEMP}
  25         echo "quit" | grub --batch --device-map=${TEMP}/grub.map &>/dev/null
  26         echo "${TEMP}/grub.map"
  27 }
  28
  29 set_bootloader_grub() {
  30         local GRUB_CONF="${BOOTDIR}/grub/grub.conf"
  31
  32         print_info 1 "Adding kernel to ${GRUB_CONF}..."
  33
  34         if [ ! -e ${GRUB_CONF} ]
  35         then
  36                 local GRUB_BOOTFS
  37                 if [ -n "${BOOTFS}" ]
  38                 then
  39                         GRUB_BOOTFS=$BOOTFS
  40                 else
  41                         GRUB_BOOTFS=$(set_bootloader_read_fstab | cut -d' ' -f2)
  42                 fi
  43
  44                 # Get the GRUB mapping for our device
  45                 local GRUB_BOOT_DISK1=$(echo ${GRUB_BOOTFS} | sed -e 's#\(/dev/.\+\)[[:digit:]]\+#\1#')
  46                 local GRUB_BOOT_DISK=$(awk '{if ($2 == "'${GRUB_BOOT_DISK1}'") {gsub(/(\(|\))/, "", $1); print $1;}}' ${TEMP}/grub.map)
  47                 local GRUB_BOOT_PARTITION=$(($(echo ${GRUB_BOOTFS} | sed -e 's#/dev/.\+\([[:digit:]]?*\)#\1#') - 1))
  48
  49                 if [ -n "${GRUB_BOOT_DISK}" -a -n "${GRUB_BOOT_PARTITION}" ]
  50                 then
  51
  52                         # Create grub configuration directory and file if it doesn't exist.
  53                         [ ! -d `dirname ${GRUB_CONF}` ] && mkdir -p `dirname ${GRUB_CONF}`
  54
  55                         touch ${GRUB_CONF}
  56                         echo 'default 0' >> ${GRUB_CONF}
  57                         echo 'timeout 5' >> ${GRUB_CONF}
  58                         echo "root (${GRUB_BOOT_DISK},${GRUB_BOOT_PARTITION})" >> ${GRUB_CONF}
  59                         echo >> ${GRUB_CONF}
  60
  61                         # Add grub configuration to grub.conf
  62                         echo "# Genkernel generated entry, see GRUB documentation for details" >> ${GRUB_CONF}
  63                         echo "title=Gentoo Linux ($KV)" >> ${GRUB_CONF}
  64                         if [ "${BUILD_INITRD}" -eq '0' ]
  65                         then
  66                                 echo -e "\tkernel /kernel-${KNAME}-${ARCH}-${KV} root=${GRUB_ROOTFS}" >> ${GRUB_CONF}
  67                         else
  68                                 echo -e "\tkernel /kernel-${KNAME}-${ARCH}-${KV} root=/dev/ram0 init=/linuxrc real_root=${GRUB_ROOTFS}" >> ${GRUB_CONF}
  69                                 if [ "${PAT}" -gt '4' ]
  70                                 then
  71                                     echo -e "\tinitrd /initramfs-${KNAME}-${ARCH}-${KV}" >> ${GRUB_CONF}
  72                                 fi
  73                         fi
  74                         echo >> ${GRUB_CONF}
  75                 else
  76                         print_error 1 "Error! ${BOOTDIR}/grub/grub.conf does not exist and the correct settings can not be automatically detected."
  77                         print_error 1 "Please manually create your ${BOOTDIR}/grub/grub.conf file."
  78                 fi
  79
  80         else
  81                 # The grub.conf already exists, so let's try to duplicate the default entry
  82         fi
  83
  84 }