gen_bootloader.sh

   1 #!/bin/bash
   2
   3 set_bootloader() {
   4         if [ "x${BOOTLOADER}" == 'xgrub' ]
   5         then
   6                 set_grub_bootloader
   7         else
   8                 return 0
   9         fi
  10 }
  11
  12 set_grub_bootloader() {
  13         local GRUB_CONF="${BOOTDIR}/grub/grub.conf"
  14
  15         print_info 1 ''
  16         print_info 1 "Adding kernel to ${GRUB_CONF}..."
  17         if [ "${BOOTFS}" != '' ]
  18         then
  19                 GRUB_BOOTFS=${BOOTFS}
  20         else
  21                 # Extract block device information from /etc/fstab
  22                 GRUB_ROOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "/" ) { print $1; exit }' /etc/fstab)
  23                 GRUB_BOOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "'${BOOTDIR}'") { print $1; exit }' /etc/fstab)
  24
  25                 # If ${BOOTDIR} is not defined in /etc/fstab, it must be the same as /
  26                 [ "x${GRUB_BOOTFS}" == 'x' ] && GRUB_BOOTFS=${GRUB_ROOTFS}
  27         fi
  28
  29         # Read GRUB device map
  30         [ ! -d ${TEMP} ] && mkdir ${TEMP}
  31         grub --batch --device-map=${TEMP}/grub.map <<EOF >/dev/null 2>&1
  32 quit
  33 EOF
  34         # Get the GRUB mapping for our device
  35         local GRUB_BOOT_DISK1=$(echo ${GRUB_BOOTFS} | sed -e 's#\(/dev/.\+\)[[:digit:]]\+#\1#')
  36         local GRUB_BOOT_DISK=$(awk '{if ($2 == "'${GRUB_BOOT_DISK1}'") {gsub(/(\(|\))/, "", $1); print $1;}}' ${TEMP}/grub.map)
  37
  38         local GRUB_BOOT_PARTITION=$(echo ${GRUB_BOOTFS} | sed -e 's#/dev/.\+\([[:digit:]]?*\)#\1#')
  39         [ ! -d ${TEMP} ] && rm -r ${TEMP}
  40
  41         # Create grub configuration directory and file if it doesn't exist.
  42         [ ! -e `dirname ${GRUB_CONF}` ] && mkdir -p `dirname ${GRUB_CONF}`
  43
  44         if [ ! -e ${GRUB_CONF} ]
  45         then
  46                 if [ "${GRUB_BOOT_DISK}" != '' -a "${GRUB_BOOT_PARTITION}" != '' ]
  47                 then
  48                         GRUB_BOOT_PARTITION=`expr ${GRUB_BOOT_PARTITION} - 1`
  49                         # grub.conf doesn't exist - create it with standard defaults
  50                         touch ${GRUB_CONF}
  51                         echo 'default 0' >> ${GRUB_CONF}
  52                         echo 'timeout 5' >> ${GRUB_CONF}
  53                         echo >> ${GRUB_CONF}
  54
  55                         # Add grub configuration to grub.conf
  56                         echo "# Genkernel generated entry, see GRUB documentation for details" >> ${GRUB_CONF}
  57                         echo "title=Gentoo Linux ($KV)" >> ${GRUB_CONF}
  58                         echo -e "\troot (${GRUB_BOOT_DISK},${GRUB_BOOT_PARTITION})" >> ${GRUB_CONF}
  59                         if [ "${BUILD_INITRD}" -eq '0' ]
  60                         then
  61                                 echo -e "\tkernel /kernel-${KNAME}-${ARCH}-${KV} root=${GRUB_ROOTFS}" >> ${GRUB_CONF}
  62                         else
  63                                 echo -e "\tkernel /kernel-${KNAME}-${ARCH}-${KV} root=/dev/ram0 init=/linuxrc real_root=${GRUB_ROOTFS}" >> ${GRUB_CONF}
  64                                 if [ "${PAT}" -gt '4' ]
  65                                 then
  66                                     echo -e "\tinitrd /initramfs-${KNAME}-${ARCH}-${KV}" >> ${GRUB_CONF}
  67                                 fi
  68                         fi
  69                         echo >> ${GRUB_CONF}
  70                 else
  71                         print_error 1 "Error! ${BOOTDIR}/grub/grub.conf does not exist and the correct settings can not be automatically detected."
  72                         print_error 1 "Please manually create your ${BOOTDIR}/grub/grub.conf file."
  73                 fi
  74         else
  75                 # grub.conf already exists; so...
  76                 # ... Clone the first boot definition and change the version.
  77                 local TYPE
  78                 [ "${KERN_24}" -eq '1' ] && TYPE='rd' || TYPE='ramfs'
  79
  80                 cp -f ${GRUB_CONF} ${GRUB_CONF}.bak
  81                 awk 'BEGIN { RS="\n"; }
  82                      {
  83                         if(match($0, "kernel-" KNAME "-" ARCH "-" KV))
  84                         { have_k="1" }
  85                         if(match($0, "init" TYPE "-" KNAME "-" ARCH "-" KV))
  86                         { have_i="1" }
  87                         if(have_k == "1" && have_i == "1")
  88                         { exit 1; }
  89                      }' KNAME=${KNAME} ARCH=${ARCH} KV=${KV} TYPE=${TYPE} ${GRUB_CONF}.bak
  90                 if [ "$?" -eq '0' ]
  91                 then
  92                         local LIMIT=$(wc -l ${GRUB_CONF}.bak)
  93                         awk -f ${GK_BIN}/gen_bootloader_grub.awk LIMIT=${LIMIT/ */} KNAME=${KNAME} ARCH=${ARCH} KV=${KV} TYPE=${TYPE} ${GRUB_CONF}.bak > ${GRUB_CONF}
  94                 else
  95                         print_info 1 "GRUB: Definition found, not duplicating."
  96                 fi
  97         fi
  98 }