iankelling.org Git - distro-setup/blob - gen-amy-fstab

   1 #!/bin/bash
   2 # I, Ian Kelling, follow the GNU license recommendations at
   3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
   4 # recommend that small programs, < 300 lines, be licensed under the
   5 # Apache License 2.0. This file contains or is part of one or more small
   6 # programs. If a small program grows beyond 300 lines, I plan to switch
   7 # its license to GPL.
   8
   9 # Copyright 2024 Ian Kelling
  10
  11 # Licensed under the Apache License, Version 2.0 (the "License");
  12 # you may not use this file except in compliance with the License.
  13 # You may obtain a copy of the License at
  14
  15 #     http://www.apache.org/licenses/LICENSE-2.0
  16
  17 # Unless required by applicable law or agreed to in writing, software
  18 # distributed under the License is distributed on an "AS IS" BASIS,
  19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 # See the License for the specific language governing permissions and
  21 # limitations under the License.
  22
  23
  24 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
  25 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
  26 set -eE -o pipefail
  27 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
  28 source /a/bin/bash-bear-trap/bash-bear
  29
  30 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  31
  32 subvol=$1 # eg ubuntubionic
  33 nr=$2 # new root
  34
  35 if (( $# != 2 )); then
  36   echo $0: error expected 2 arguments
  37   exit 1
  38 fi
  39
  40 # lots of this is taken from default.PARTITION
  41
  42 if (($(nproc) > 2)); then
  43   mopts=,compress=zstd
  44 fi
  45
  46 rm -f $nr/etc/{fs,crypt}tab
  47 while read -r line; do
  48   printf "%s none  keyscript=decrypt_keyctl,discard,luks,initramfs\n" "$line" >>$nr/etc/crypttab
  49 done < <(awk '{print $1,$2}' /mnt/root/root2-crypttab)
  50 awk '$3 == "/dev/urandom" {print}' /etc/crypttab >>$nr/etc/crypttab
  51
  52
  53 rootdev=$(awk '$2 == "/mnt/root2" {print $1}' /mnt/root/root2-fstab)
  54 fstabstd=x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s
  55 bootdev=$(awk '$2 == "/mnt/boot2" {print $1}' /mnt/root/root2-fstab)
  56
  57
  58 cat >> $nr/etc/fstab <<EOF
  59 $rootdev  /  btrfs $fstabstd,noatime,subvol=root_$subvol$mopts  0 0
  60 $rootdev  /mnt/root  btrfs  $fstabstd,noatime,subvolid=0$mopts  0 0
  61 $bootdev  /boot btrfs  nofail,$fstabstd,noatime,subvol=boot_$subvol  0 0
  62 $bootdev  /mnt/boot  btrfs  nofail,$fstabstd,noatime,subvolid=0  0 0
  63 tmpfs     /tmp tmpfs     nodev,nosuid,size=50%,mode=1777   0    0
  64 EOF
  65 awk '$2 == "/boot/efi" {print}' /etc/fstab >>$nr/etc/fstab
  66
  67
  68 while read -r mdname; do
  69   cat >> $nr/etc/fstab <<EOF
  70 /dev/mapper/$mdname  none  swap  nofail,$fstabstd,sw  0 0
  71 EOF
  72 done < <(awk '$3 == "/dev/urandom" {print $1}' /etc/crypttab)