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#!/usr/bin/env bash
# Script to create a refind_linux.conf file for the current Linux
# installation.
# copyright (c) 2012-2015 by Roderick W. Smith
#
# This program is licensed under the terms of the GNU GPL, version 3,
# or (at your option) any later version.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Usage:
#
# ./mkrlconf [--force]
#
# Options:
#
# --force -- Overwrite an existing file (default is to not replace existing file)
# Revision history:
#
# 0.10.1 -- Improve extraction of kernel options from /proc/cmdline
# 0.10.0 -- Renamed from mkrlconf.sh to mkrlconf; changed to get $DefaultOptions
# from /proc/cmdline rather than from GRUB
# 0.9.0 -- Added check for OS type, to keep from running pointlessly on OS X
# 0.7.7 -- Fixed bug that caused stray PARTUUID= and line breaks in generated file
# 0.5.1 -- Initial release
#
# Note: mkrlconf version numbers match those of the rEFInd package
# with which they first appeared.
RLConfFile="/boot/refind_linux.conf"
if [[ $(uname -s) != "Linux" ]] ; then
echo "This script is intended to be run from Linux. Aborting!"
echo ""
exit 1
fi
if [[ ! -f $RLConfFile || $1 == "--force" ]] ; then
RootFS=$(df / | grep dev | cut -f 1 -d " ")
StartOfDevname=$(echo "$RootFS" | cut -b 1-7)
if [[ $StartOfDevname == "/dev/sd" || $StartOfDevname == "/dev/hd" ]] ; then
# Identify root filesystem by UUID rather than by device node, if possible
Uuid=$(blkid -o export -s UUID "$RootFS" 2> /dev/null | grep UUID=)
if [[ -n $Uuid ]] ; then
RootFS=$Uuid
fi
fi
FirstCmdlineOption=$(cut -d ' ' -f 1 < /proc/cmdline)
if [[ "$FirstCmdlineOption" =~ (vmlinuz|bzImage|kernel) ]] ; then
DefaultOptions=$(cut -d ' ' -f 2- < /proc/cmdline | sed 's/\S*initrd=\S*//g' | sed 's/ *$//' | sed 's/^ *//')
else
DefaultOptions=$(sed 's/\S*initrd=\S*//g' < /proc/cmdline | sed 's/ *$//' | sed 's/^ *//')
fi
echo "\"Boot with standard options\" \"$DefaultOptions\"" > $RLConfFile
echo "\"Boot to single-user mode\" \"$DefaultOptions single\"" >> $RLConfFile
echo "\"Boot with minimal options\" \"ro root=$RootFS\"" >> $RLConfFile
else
echo "Existing $RLConfFile found! Not overwriting!"
echo "To force overwriting, pass the --force option."
echo ""
fi
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