code.delx.au - refind/blob - mkrlconf

   1 #!/bin/bash
   2
   3 # Script to create a refind_linux.conf file for the current Linux
   4 # installation.
   5
   6 # copyright (c) 2012-2015 by Roderick W. Smith
   7 #
   8 # This program is licensed under the terms of the GNU GPL, version 3,
   9 # or (at your option) any later version.
  10 # You should have received a copy of the GNU General Public License
  11 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  12
  13 # Usage:
  14 #
  15 # ./mkrlconf [--force]
  16 #
  17 # Options:
  18 #
  19 #   --force  -- Overwrite an existing file (default is to not replace existing file)
  20
  21 # Revision history:
  22 #
  23 # 0.10.1  -- Improve extraction of kernel options from /proc/cmdline
  24 # 0.10.0  -- Renamed from mkrlconf.sh to mkrlconf; changed to get $DefaultOptions
  25 #            from /proc/cmdline rather than from GRUB
  26 # 0.9.0   -- Added check for OS type, to keep from running pointlessly on OS X
  27 # 0.7.7   -- Fixed bug that caused stray PARTUUID= and line breaks in generated file
  28 # 0.5.1   -- Initial release
  29 #
  30 # Note: mkrlconf version numbers match those of the rEFInd package
  31 # with which they first appeared.
  32
  33 RLConfFile="/boot/refind_linux.conf"
  34
  35 if [[ `uname -s` != "Linux" ]] ; then
  36     echo "This script is intended to be run from Linux. Aborting!"
  37     echo ""
  38     exit 1
  39 fi
  40
  41 if [[ ! -f $RLConfFile || $1 == "--force" ]] ; then
  42     RootFS=`df / | grep dev | cut -f 1 -d " "`
  43     StartOfDevname=`echo $RootFS | cut -b 1-7`
  44     if [[ $StartOfDevname == "/dev/sd" || $StartOfDevName == "/dev/hd" ]] ; then
  45         # Identify root filesystem by UUID rather than by device node, if possible
  46         Uuid=`blkid -o export -s UUID $RootFS 2> /dev/null | grep UUID=`
  47         if [[ -n $Uuid ]] ; then
  48             RootFS=$Uuid
  49         fi
  50     fi
  51     FirstCmdlineOption=`cat /proc/cmdline | cut -d ' ' -f 1`
  52     if [[ "$FirstCmdlineOption" =~ (vmlinuz|bzImage|kernel) ]] ; then
  53         DefaultOptions=`cat /proc/cmdline | cut -d ' ' -f 2- | sed 's/\S*initrd=\S*//g' | sed 's/ *$//' | sed 's/^ *//'`
  54     else
  55         DefaultOptions=`cat /proc/cmdline | sed 's/\S*initrd=\S*//g' | sed 's/ *$//' | sed 's/^ *//'`
  56     fi
  57     echo "\"Boot with standard options\"  \"$DefaultOptions\"" > $RLConfFile
  58     echo "\"Boot to single-user mode\"    \"$DefaultOptions single\"" >> $RLConfFile
  59     echo "\"Boot with minimal options\"   \"ro root=$RootFS\"" >> $RLConfFile
  60 else
  61     echo "Existing $RLConfFile found! Not overwriting!"
  62     echo "To force overwriting, pass the --force option."
  63     echo ""
  64 fi