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 source /a/bin/bash-bear-trap/bash-bear
  10
  11 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  12
  13 subvol=$1 # eg ubuntubionic
  14 nr=$2 # new root
  15
  16 if (( $# != 2 )); then
  17   echo $0: error expected 2 arguments
  18   exit 1
  19 fi
  20
  21 # lots of this is taken from default.PARTITION
  22
  23 if (($(nproc) > 2)); then
  24   mopts=,compress=zstd
  25 fi
  26
  27 rm -f $nr/etc/{fs,crypt}tab
  28 while read -r line; do
  29   printf "%s none  keyscript=decrypt_keyctl,discard,luks,initramfs\n" "$line" >>$nr/etc/crypttab
  30 done < <(awk '{print $1,$2}' /mnt/root/root2-crypttab)
  31 awk '$3 == "/dev/urandom" {print}' /etc/crypttab >>$nr/etc/crypttab
  32
  33
  34 rootdev=$(awk '$2 == "/mnt/root2" {print $1}' /mnt/root/root2-fstab)
  35 fstabstd=x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s
  36 bootdev=$(awk '$2 == "/mnt/boot2" {print $1}' /mnt/root/root2-fstab)
  37
  38
  39 cat >> $nr/etc/fstab <<EOF
  40 $rootdev  /  btrfs $fstabstd,noatime,subvol=root_$subvol$mopts  0 0
  41 $rootdev  /mnt/root  btrfs  $fstabstd,noatime,subvolid=0$mopts  0 0
  42 $bootdev  /boot btrfs  nofail,$fstabstd,noatime,subvol=boot_$subvol  0 0
  43 $bootdev  /mnt/boot  btrfs  nofail,$fstabstd,noatime,subvolid=0  0 0
  44 tmpfs     /tmp tmpfs     nodev,nosuid,size=50%,mode=1777   0    0
  45 EOF
  46 awk '$2 == "/boot/efi" {print}' /etc/fstab >>$nr/etc/fstab
  47
  48
  49 while read -r mdname; do
  50   cat >> $nr/etc/fstab <<EOF
  51 /dev/mapper/$mdname  none  swap  nofail,$fstabstd,sw  0 0
  52 EOF
  53 done < <(awk '$3 == "/dev/urandom" {print $1}' /etc/crypttab)