# Copyright 1999-2008 Gentoo Foundation; 2008 Chris Gianelloni, Andrew Gaffney
# Distributed under the GPL v2
+ 15 Dec 2008; Andrew Gaffney <agaffney@gentoo.org> gen_bootloader.sh:
+ Adding code that duplicates default grub.conf entry to replace old awk
+ script. Based on code written by Mike Auty <ikelos@gentoo.org>
+
15 Dec 2008; Andrew Gaffney <agaffney@gentoo.org> +gen_bootloader.sh,
gen_cmdline.sh, gen_determineargs.sh, genkernel:
Initial commit for re-adding support for --bootloader=grub
else
# The grub.conf already exists, so let's try to duplicate the default entry
+ 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_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 ! 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}"
+}