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executable file 154 lines (126 sloc) 5.333 kB
# $Id$
set_bootloader() {
case "${BOOTLOADER}" in
grub)
set_bootloader_grub
;;
*)
print_warning "Bootloader ${BOOTLOADER} is not currently supported"
;;
esac
}
set_bootloader_read_fstab() {
local ROOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "/" ) { print $1; exit }' /etc/fstab)
local BOOTFS=$(awk 'BEGIN{RS="((#[^\n]*)?\n)"}( $2 == "'${BOOTDIR}'") { print $1; exit }' /etc/fstab)
# If ${BOOTDIR} is not defined in /etc/fstab, it must be the same as /
[ -z "${BOOTFS}" ] && BOOTFS=${ROOTFS}
echo "${ROOTFS} ${BOOTFS}"
}
set_bootloader_grub_read_device_map() {
# Read GRUB device map
[ ! -d ${TEMP} ] && mkdir ${TEMP}
echo "quit" | grub --batch --device-map=${TEMP}/grub.map &>/dev/null
echo "${TEMP}/grub.map"
}
set_bootloader_grub() {
local GRUB_CONF="${BOOTDIR}/grub/grub.conf"
print_info 1 "Adding kernel to ${GRUB_CONF}..."
if [ ! -e ${GRUB_CONF} ]
then
local GRUB_BOOTFS
if [ -n "${BOOTFS}" ]
then
GRUB_BOOTFS=$BOOTFS
else
GRUB_BOOTFS=$(set_bootloader_read_fstab | cut -d' ' -f2)
fi
# Get the GRUB mapping for our device
local GRUB_BOOT_DISK1=$(echo ${GRUB_BOOTFS} | sed -e 's#\(/dev/.\+\)[[:digit:]]\+#\1#')
local GRUB_BOOT_DISK=$(awk '{if ($2 == "'${GRUB_BOOT_DISK1}'") {gsub(/(\(|\))/, "", $1); print $1;}}' ${TEMP}/grub.map)
local GRUB_BOOT_PARTITION=$(($(echo ${GRUB_BOOTFS} | sed -e 's#/dev/.\+\([[:digit:]]?*\)#\1#') - 1))
if [ -n "${GRUB_BOOT_DISK}" -a -n "${GRUB_BOOT_PARTITION}" ]
then
# Create grub configuration directory and file if it doesn't exist.
[ ! -d `dirname ${GRUB_CONF}` ] && mkdir -p `dirname ${GRUB_CONF}`
touch ${GRUB_CONF}
echo 'default 0' >> ${GRUB_CONF}
echo 'timeout 5' >> ${GRUB_CONF}
echo "root (${GRUB_BOOT_DISK},${GRUB_BOOT_PARTITION})" >> ${GRUB_CONF}
echo >> ${GRUB_CONF}
# Add grub configuration to grub.conf
echo "# Genkernel generated entry, see GRUB documentation for details" >> ${GRUB_CONF}
echo "title=Gentoo Linux ($KV)" >> ${GRUB_CONF}
if [ "${BUILD_INITRD}" -eq '0' ]
then
echo -e "\tkernel /kernel-${KNAME}-${ARCH}-${KV} root=${GRUB_ROOTFS}" >> ${GRUB_CONF}
else
echo -e "\tkernel /kernel-${KNAME}-${ARCH}-${KV} root=/dev/ram0 init=/linuxrc real_root=${GRUB_ROOTFS}" >> ${GRUB_CONF}
if [ "${PAT}" -gt '4' ]
then
echo -e "\tinitrd /initramfs-${KNAME}-${ARCH}-${KV}" >> ${GRUB_CONF}
fi
fi
echo >> ${GRUB_CONF}
else
print_error 1 "Error! ${BOOTDIR}/grub/grub.conf does not exist and the correct settings can not be automatically detected."
print_error 1 "Please manually create your ${BOOTDIR}/grub/grub.conf file."
fi
else
# The grub.conf already exists, so let's try to duplicate the default entry
if set_bootloader_grub_check_for_existing_entry "${GRUB_CONF}"; then
print_warning 1 "An entry was already found for a kernel/initramfs with this name...skipping update"
return 0
fi
set_bootloader_grub_duplicate_default "${GRUB_CONF}"
fi
}
set_bootloader_grub_duplicate_default_replace_kernel_initrd() {
sed -r -e "/^[[:space:]]*kernel/s/kernel-[[:alnum:][:punct:]]+/kernel-${KNAME}-${ARCH}-${KV}/" - |
sed -r -e "/^[[:space:]]*initrd/s/init(rd|ramfs)-[[:alnum:][:punct:]]+/init\1-${KNAME}-${ARCH}-${KV}/"
}
set_bootloader_grub_check_for_existing_entry() {
local GRUB_CONF=$1
if grep -q "^[[:space:]]*kernel[[:space:]=]*.*/kernel-${KNAME}-${ARCH}-${KV}\([[:space:]]\|$\)" "${GRUB_CONF}" &&
grep -q "^[[:space:]]*initrd[[:space:]=]*.*/initramfs-${KNAME}-${ARCH}-${KV}\([[:space:]]\|$\)" "${GRUB_CONF}"
then
return 0
fi
return 1
}
set_bootloader_grub_duplicate_default() {
local GRUB_CONF=$1
local GRUB_CONF_TMP="${GRUB_CONF}.tmp"
line_count=$(wc -l < "${GRUB_CONF}")
line_nums="$(grep -n "^title" "${GRUB_CONF}" | cut -d: -f1)"
if [ -z "${line_nums}" ]; then
print_error 1 "No current 'title' entries found in your grub.conf...skipping update"
return 0
fi
line_nums="${line_nums} $((${line_count}+1))"
# Find default entry
default=$(sed -rn '/^[[:space:]]*default[[:space:]=]/s/^.*default[[:space:]=]+([[:alnum:]]+).*$/\1/p' "${GRUB_CONF}")
if [ -z "${default}" ]; then
print_warning 1 "No default entry found...assuming 0"
default=0
fi
if ! echo ${default} | grep -q '^[0-9]\+$'; then
print_error 1 "We don't support non-numeric (such as 'saved') default values...skipping update"
return 0
fi
# Grub defaults are 0 based, cut is 1 based
# Figure out where the default entry lives
startstop=$(echo ${line_nums} | cut -d" " -f$((${default}+1))-$((${default}+2)))
startline=$(echo ${startstop} | cut -d" " -f1)
stopline=$(echo ${startstop} | cut -d" " -f2)
# Write out the bits before the default entry
sed -n 1,$((${startline}-1))p "${GRUB_CONF}" > "${GRUB_CONF_TMP}"
# Put in our title
echo "title=Gentoo Linux (${KV})" >> "${GRUB_CONF_TMP}"
# Pass the default entry (minus the title) through to the replacement function and pipe the output to GRUB_CONF_TMP
sed -n $((${startline}+1)),$((${stopline}-1))p "${GRUB_CONF}" | set_bootloader_grub_duplicate_default_replace_kernel_initrd >> "${GRUB_CONF_TMP}"
# Finish off with everything including the previous default entry
sed -n ${startline},${line_count}p "${GRUB_CONF}" >> "${GRUB_CONF_TMP}"
cp "${GRUB_CONF}" "${GRUB_CONF}.bak"
cp "${GRUB_CONF_TMP}" "${GRUB_CONF}"
rm "${GRUB_CONF_TMP}"
}
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