iankelling.org Git - distro-setup/blob - check-crypttab

   1 #!/bin/bash
   2
   3 # I somehow ended up with an empty crypttab, and had to rescue my
   4 # system. So, lets check for some basic validity.
   5
   6 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
   7 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
   8 set -eE -o pipefail
   9 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
  10
  11 debug=false
  12 if [[ $1 ]]; then
  13   debug=true
  14 fi
  15 d() {
  16   if $debug; then
  17     printf "%s\n" "$*"
  18   fi
  19 }
  20
  21 metric_dir=/var/lib/prometheus/node-exporter
  22 mnt="$(findmnt -fn -o SOURCE /)"
  23 case $mnt in
  24   /dev/mapper/crypt_dev_*)
  25     tmp=${mnt#/dev/mapper/}
  26     dev=${tmp%%\[*}
  27     if ! grep -qF $dev /etc/crypttab; then
  28       d $dev
  29       if [[ -e $metric_dir  ]]; then
  30         echo "crypttab_check 1" > $metric_dir/crypttab_check.prom
  31         exit 0
  32       fi
  33     fi
  34     ;;
  35 esac
  36 if [[ -e $metric_dir  ]]; then
  37   echo "crypttab_check 0" > $metric_dir/crypttab_check.prom
  38 fi