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. $(date)"
  16 fi
  17 rootn=1
  18
  19 sed="sed --follow-symlinks"
  20
  21 # for running under corn, we need this, else, if we call
  22 # /sbin/update-initramfs , it will fail with:
  23 # /sbin/update-initramfs: 157: mkinitramfs: not found
  24 PATH="/sbin:$PATH"
  25
  26 if [[ $INVOCATION_ID ]]; then
  27   if [[ -e /b/bash_unpublished/source-state ]]; then
  28     # this is the canonical one
  29     source /b/bash_unpublished/source-state
  30   elif [[ -e /dev/shm/iank-status ]]; then
  31     # This one gets copied by system-status and is useful because it
  32     # exists when /a is unmounted.
  33     source /dev/shm/iank-status
  34   fi
  35   if [[ $MAIL_HOST && $MAIL_HOST != $HOSTNAME ]]; then
  36     echo "$0: exiting early: running under systemd as MAIL_HOST"
  37     exit 0
  38   fi
  39 fi
  40
  41 if [[ ! -e /tmp/keyscript-off ]]; then
  42   if [[ $($sed -rn 's/^ID=(.*)/\1/p' /etc/os-release) == arch ]]; then
  43     if ! grep -q '^\s*FILES=' /etc/mkinitcpio.conf; then
  44       $sed -ri 's/^#(\s*FILES=.*)/\1/' /etc/mkinitcpio.conf # uncomment
  45       mkinitcpio -p linux
  46     fi
  47   else
  48     x=decrypt_keyctl
  49     if grep -q "${x}," /etc/crypttab; then
  50       $sed -i "s#${x},#/root/keyscript,#" /etc/crypttab
  51       update-initramfs -u
  52     fi
  53   fi
  54 fi
  55 # switch to easy or hard login pass which is the same as luks
  56 f=/q/root/shadow/traci-simple
  57 [[ $HOSTNAME != tpnew ]] || usermod -p "$(cat $f)" iank
  58
  59 echo "$0: finished. $(date)"