#!/bin/bash # Configure grub. Note that the various conditionals here are to handle # different distributions gracefully. if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then set -x fi set -eu set -o pipefail BOOT_DEV=$IMAGE_BLOCK_DEVICE # All available devices, handy for some bootloaders... declare -A DEVICES eval DEVICES=( $IMAGE_BLOCK_DEVICES ) function install_extlinux { install-packages -m bootloader extlinux echo "Installing Extlinux..." # Find and install mbr.bin for MBR in /usr/share/syslinux/mbr.bin /usr/lib/syslinux/mbr.bin \ /usr/lib/extlinux/mbr.bin /usr/lib/EXTLINUX/mbr.bin ; do if [ -f $MBR ]; then break fi done if [ ! -f $MBR ]; then echo "mbr.bin (from EXT/SYSLINUX) not found." exit 1 fi dd if=$MBR of=$BOOT_DEV # Find any pre-created extlinux install directory for EXTDIR in /boot/extlinux /boot/syslinux ; do if [ -d $EXTDIR ] ; then break fi done if [ ! -d $EXTDIR ] ; then # No install directory found so default to /boot/syslinux EXTDIR=/boot/syslinux mkdir -p $EXTDIR fi # Finally install extlinux extlinux --install $EXTDIR } function install_grub2 { # Check for offline installation of grub if [ -f "/tmp/grub/install" ] ; then source /tmp/grub/install # Right now we can't use pkg-map to branch by arch, so tag an architecture # specific virtual package so we can install the rigth thing based on # distribution. elif [[ "$ARCH" =~ "ppc" ]]; then install-packages -m bootloader grub-ppc64 else install-packages -m bootloader grub-pc fi # XXX: grub-probe on the nbd0/loop0 device returns nothing - workaround, manually # specify modules. https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1073731 GRUBNAME=$(type -p grub-install) || echo "trying grub2-install" if [ -z "$GRUBNAME" ]; then GRUBNAME=$(type -p grub2-install) fi # If no GRUB2 is found, fallback to extlinux if [ -z "$GRUBNAME" ] || [ $($GRUBNAME --version | grep "0.97" | wc -l) -ne 0 ]; then echo "No GRUB2 found. Fallback to Extlinux..." install_extlinux exit 0 fi echo "Installing GRUB2..." # We need --force so grub does not fail due to being installed on the # root partition of a block device. GRUB_OPTS=${GRUB_OPTS:-"--force"} # XXX: This is buggy: # - --target=i386-pc is invalid for non-i386/amd64 architectures # - and for UEFI too. # GRUB_OPTS="$GRUB_OPTS --target=i386-pc" if [[ ! $GRUB_OPTS == *--target* ]] && [[ $($GRUBNAME --version) =~ ' 2.' ]]; then # /sys/ comes from the host machine. If the host machine is using EFI # but the image being built doesn't have EFI boot-images installed we # should set the --target to use a BIOS-based boot-image. # # * --target tells grub what's the target platform # * the boot images are placed in /usr/lib/grub/- # * i386-pc is used for BIOS-based machines # http://www.gnu.org/software/grub/manual/grub.html#Installation # if [ -d /sys/firmware/efi ]; then if [ ! -d /usr/lib/grub/*-efi ]; then case $ARCH in "x86_64"|"amd64") GRUB_OPTS="$GRUB_OPTS --target=i386-pc" ;; "i386") target=i386-pc if [ -e /proc/device-tree ]; then for x in /proc/device-tree/*; do if [ -e "$x" ]; then target="i386-ieee1275" fi done fi GRUB_OPTS="$GRUB_OPTS --target=$target" ;; esac fi fi fi if [[ "$ARCH" =~ "ppc" ]] ; then # For PPC (64-Bit regardless of Endian-ness), we use the "boot" # partition as the one to point grub-install to, not the loopback # device. ppc has a dedicated PReP boot partition. # For grub2 < 2.02~beta3 this needs to be a /dev/mapper/... node after # that a dev/loopXpN node will work fine. $GRUBNAME --modules="part_msdos" $GRUB_OPTS ${DEVICES[boot]} --no-nvram else $GRUBNAME --modules="biosdisk part_msdos" $GRUB_OPTS $BOOT_DEV fi # This might be better factored out into a per-distro 'install-bootblock' # helper. if [ -d /boot/grub2 ]; then GRUB_CFG=/boot/grub2/grub.cfg elif [ -d /boot/grub ]; then GRUB_CFG=/boot/grub/grub.cfg fi # Override the root device to the default label, and disable uuid # lookup. echo "GRUB_DEVICE=LABEL=${DIB_ROOT_LABEL}" >> /etc/default/grub echo 'GRUB_DISABLE_LINUX_UUID=true' >> /etc/default/grub echo "GRUB_TIMEOUT=${DIB_GRUB_TIMEOUT:-5}" >>/etc/default/grub echo 'GRUB_TERMINAL="serial console"' >>/etc/default/grub echo 'GRUB_GFXPAYLOAD_LINUX=text' >>/etc/default/grub echo 'GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200 no_timer_check"' >>/etc/default/grub echo 'GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"' >>/etc/default/grub if type grub2-mkconfig >/dev/null; then GRUB_MKCONFIG="grub2-mkconfig -o $GRUB_CFG" else GRUB_MKCONFIG="grub-mkconfig -o $GRUB_CFG" fi DISTRO_NAME=${DISTRO_NAME:-} case $DISTRO_NAME in 'ubuntu'|'debian') sed -i -e "s/\(^GRUB_CMDLINE_LINUX.*\)\"$/\1 ${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"/" /etc/default/grub GRUB_MKCONFIG=update-grub ;; 'fedora'|'centos7'|'centos') echo "GRUB_CMDLINE_LINUX=\"${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"" >>/etc/default/grub ;; 'opensuse') sed -i -e "s/\(^GRUB_CMDLINE_LINUX.*\)\"$/\1 ${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"/" /etc/default/grub ;; esac # os-prober leaks /dev/sda into config file in dual-boot host # Disable grub-os-prober to avoid the issue while running # grub-mkconfig # Setting a flag to track whether the entry is already there in grub config PROBER_DISABLED= if ! grep -qe "^\s*GRUB_DISABLE_OS_PROBER=true" /etc/default/grub; then PROBER_DISABLED=true echo 'GRUB_DISABLE_OS_PROBER=true' >> /etc/default/grub fi $GRUB_MKCONFIG # Remove the fix to disable os_prober if [ -n "$PROBER_DISABLED" ]; then sed -i '$d' /etc/default/grub fi # grub-mkconfig generates a config with the device in it, # This shouldn't be needed, but old code has bugs DIB_RELEASE=${DIB_RELEASE:-} if [ "$DIB_RELEASE" = 'wheezy' ]; then sed -i "s%search --no.*%%" $GRUB_CFG sed -i "s%set root=.*%set root=(hd0,1)%" $GRUB_CFG fi # Fix efi specific instructions in grub config file if [ -d /sys/firmware/efi ]; then sed -i 's%\(initrd\|linux\)efi /boot%\1 /boot%g' $GRUB_CFG fi } DIB_EXTLINUX=${DIB_EXTLINUX:-0} if [ "$DIB_EXTLINUX" != "0" ]; then install_extlinux else install_grub2 fi