iankelling.org Git - distro-setup/blob - switch-primary-host

   1 #!/bin/bash
   2
   3 # this pulls from host $1 to the current host.
   4 # not currently used, but it might be useful at some point
   5
   6 source /a/bin/errhandle/err
   7
   8 cd /
   9
  10 old=$1
  11 new=$HOSTNAME
  12
  13 if [[ ! $old ]]; then
  14     echo "$0: error: no \$1 given, should be old host"
  15     exit 1
  16 fi
  17
  18 if ! timeout -s 9 2 ssh $old : ; then
  19     echo "$0: error: can't ssh to $old"
  20 fi
  21
  22 for p in emacs firefox pidgin; do
  23     ssh $old killall $p ||:
  24 done
  25
  26 # note: duplicated in check-subvol-stale
  27 last_a=$(
  28     vol=a
  29     for s in /mnt/root/btrbk/$vol.*; do
  30         f=${s##*/}
  31         unix_time=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#$vol.}) +%s)
  32         printf "%s\n" $unix_time
  33     done | sort -r | head -n 1
  34       )
  35
  36 if [[ $last_a != [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9] ]]; then
  37     echo "$0: error: last_a bad value: $last_a"
  38     exit 1
  39 fi
  40
  41 # if last_a is recent enough, skip doing btrbk
  42 if  (( last_a < $(date +%s) - 60*60 )); then
  43     if ! ssh $old btrbk-run -pvt $new; then
  44         echo "$0: error: failed btrbk-run"
  45         exit 1
  46     fi
  47 fi
  48
  49 switch-mail-host $old $new