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

   1 #!/bin/bash
   2 # Copyright (C) 2019 Ian Kelling
   3 # SPDX-License-Identifier: Apache-2.0
   4
   5 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
   6 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
   7 set -eE -o pipefail
   8 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
   9 # alternatively, using https://iankelling.org/git/?p=errhandle;a=tree
  10 # source /path/errhandle/err
  11 # on my machine
  12 source /a/bin/errhandle/err
  13
  14 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  15
  16 subvol=$1 # eg ubuntubionic
  17 nr=$2 # new root
  18
  19 if (( $# != 2 )); then
  20   echo $0: error expected 2 arguments
  21   exit 1
  22 fi
  23
  24 # lots of this is taken from default.PARTITION
  25
  26 if (($(nproc) > 2)); then
  27   mopts=,compress=zstd
  28 fi
  29
  30 rm -f $nr/etc/{fs,crypt}tab
  31 while read -r line; do
  32   printf "%s none  keyscript=decrypt_keyctl,discard,luks,initramfs\n" "$line" >>$nr/etc/crypttab
  33 done < <(awk '{print $1,$2}' /mnt/root/root2-crypttab)
  34 awk '$3 == "/dev/urandom" {print}' /etc/crypttab >>$nr/etc/crypttab
  35
  36
  37 rootdev=$(awk '$2 == "/mnt/root2" {print $1}' /mnt/root/root2-fstab)
  38 fstabstd=x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s
  39 bootdev=$(awk '$2 == "/mnt/boot2" {print $1}' /mnt/root/root2-fstab)
  40
  41
  42 cat >> $nr/etc/fstab <<EOF
  43 $rootdev  /  btrfs $fstabstd,noatime,subvol=root_$subvol$mopts  0 0
  44 $rootdev  /mnt/root  btrfs  $fstabstd,noatime,subvolid=0$mopts  0 0
  45 $bootdev  /boot btrfs  nofail,$fstabstd,noatime,subvol=boot_$subvol  0 0
  46 $bootdev  /mnt/boot  btrfs  nofail,$fstabstd,noatime,subvolid=0  0 0
  47 tmpfs     /tmp tmpfs     nodev,nosuid,size=50%,mode=1777   0    0
  48 EOF
  49 awk '$2 == "/boot/efi" {print}' /etc/fstab >>$nr/etc/fstab
  50
  51
  52 while read -r mdname; do
  53   cat >> $nr/etc/fstab <<EOF
  54 /dev/mapper/$mdname  none  swap  nofail,$fstabstd,sw  0 0
  55 EOF
  56 done < <(awk '$3 == "/dev/urandom" {print $1}' /etc/crypttab)