iankelling.org Git - automated-distro-installer/blob - install-chboot

   1 #!/bin/bash
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License
   6 # as published by the Free Software Foundation; either version 2
   7 # of the License, or (at your option) any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17
  18 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  19
  20 set -e; . /usr/local/lib/bash-bear; set +e
  21
  22 usage() {
  23     cat <<'EOF'
  24 Usage: isntall-chboot [-h|--help]
  25 reinstall chboot to /boot subvols, for chboot updates.
  26
  27 We install to /boot in case there is an issue booting and only the /boot
  28 vol is readily available. For the bootstrap subvol, this is the normal
  29 case.
  30 EOF
  31     exit 0
  32 }
  33 case $1 in
  34     -h|--help) usage ;;
  35 esac
  36
  37
  38 e() { echo "$@"; "$@"; }
  39
  40 boot_dev=$(mount | sed -rn "s#^(\S+) on /boot .*#\1#p")
  41 mount_point=$(mktemp -d)
  42 e mount -o subvolid=0 $boot_dev $mount_point
  43
  44 shopt -s nullglob
  45 for dir in "$mount_point"/*; do
  46     btrfs subvol show $dir &>/dev/null || continue
  47     if [[ -e $dir/boot ]]; then
  48         dir=$dir/boot
  49     fi
  50     e install -m 755 -o root -g root chboot $dir
  51 done
  52 e umount $mount_point
  53 e rmdir $mount_point