iankelling.org Git - distro-setup/blob - keyscript-on

   1 #!/bin/bash
   2 # Copyright (C) 2019 Ian Kelling
   3 # SPDX-License-Identifier: AGPL-3.0-or-later
   4
   5
   6 # setup automatic decryption on boot using host-specific key file.
   7 # When changing a hostname, that key needs updating.
   8
   9 set -eE -o pipefail
  10 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
  11
  12 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  13 if [[ $- != *i* ]]; then
  14   exec &>>/var/log/keyscript-on.log
  15   echo "$0: starting. $(date)"
  16 fi
  17
  18 sed="sed --follow-symlinks"
  19
  20 # for running under corn, we need this, else, if we call
  21 # /sbin/update-initramfs , it will fail with:
  22 # /sbin/update-initramfs: 157: mkinitramfs: not found
  23 PATH="/sbin:$PATH"
  24
  25 if [[ $INVOCATION_ID ]]; then
  26   if [[ -e /b/bash_unpublished/source-state ]]; then
  27     # this is the canonical one
  28     source /b/bash_unpublished/source-state
  29   elif [[ -e /dev/shm/iank-status ]]; then
  30     # This one gets copied by system-status and is useful because it
  31     # exists when /a is unmounted.
  32     source /dev/shm/iank-status
  33   fi
  34   if [[ $MAIL_HOST && $MAIL_HOST != "$HOSTNAME" ]]; then
  35     echo "$0: exiting early: running under systemd as MAIL_HOST"
  36     exit 0
  37   fi
  38 fi
  39
  40 if [[ ! -e /tmp/keyscript-off ]]; then
  41   if [[ $($sed -rn 's/^ID=(.*)/\1/p' /etc/os-release) == arch ]]; then
  42     if ! grep -q '^\s*FILES=' /etc/mkinitcpio.conf; then
  43       $sed -ri 's/^#(\s*FILES=.*)/\1/' /etc/mkinitcpio.conf # uncomment
  44       mkinitcpio -p linux
  45     fi
  46   else
  47     x=decrypt_keyctl
  48     if grep -q "${x}," /etc/crypttab; then
  49       $sed -i "s#${x},#/root/keyscript,#" /etc/crypttab
  50       update-initramfs -u
  51     fi
  52   fi
  53 fi
  54 # switch to easy or hard login pass which is the same as luks
  55 f=/q/root/shadow/traci-simple
  56 [[ $HOSTNAME != tpnew ]] || usermod -p "$(cat $f)" iank
  57
  58 echo "$0: finished. $(date)"