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 $?" >&2' ERR
  22
  23 # usage install-chboot: isntalls chboot to all /boot subvols,
  24 # in case there is an issue booting and it is needed.
  25 # Run this when chboot changes.
  26
  27 cd "${BASH_SOURCE%/*}"
  28
  29 e() { echo "$@"; "$@"; }
  30
  31 boot_dev=$(mount | sed -rn "s#^(\S+) on /boot .*#\1#p")
  32 mount_point=$(mktemp -d)
  33 e mount -o subvolid=0 $boot_dev $mount_point
  34
  35 shopt -s nullglob
  36 for dir in $mount_point/*; do
  37     btrfs subvol show $dir &>/dev/null || continue
  38     if [[ -e $dir/boot ]]; then
  39         dir=$dir/boot
  40     fi
  41     e install -m 755 -o root -g root chboot $dir
  42 done
  43 e umount $mount_point
  44 e rmdir $mount_point