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" "$@"
  19
  20 set -eE -o pipefail
  21 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
  22
  23
  24 x=$(readlink -f "$BASH_SOURCE"); cd ${x%/*}
  25
  26 usage() {
  27     cat <<EOF
  28 Usage: ${0##*/} [-h|--help]
  29 reinstall chboot to /boot subvols, for chboot updates.
  30
  31 We install to /boot in case there is an issue booting and only the /boot
  32 vol is readily available. For the bootstrap subvol, this is the normal
  33 case.
  34 EOF
  35     exit $1
  36 }
  37 case $1 in
  38     -h|--help) usage ;;
  39 esac
  40
  41
  42 e() { echo "$@"; "$@"; }
  43
  44 boot_dev=$(mount | sed -rn "s#^(\S+) on /boot .*#\1#p")
  45 mount_point=$(mktemp -d)
  46 e mount -o subvolid=0 $boot_dev $mount_point
  47
  48 shopt -s nullglob
  49 for dir in $mount_point/*; do
  50     btrfs subvol show $dir &>/dev/null || continue
  51     if [[ -e $dir/boot ]]; then
  52         dir=$dir/boot
  53     fi
  54     e install -m 755 -o root -g root chboot $dir
  55 done
  56 e umount $mount_point
  57 e rmdir $mount_point