zfs/debian/zfsutils-linux.postinst

   1 #!/bin/sh
   2 set -e
   3 # The hostname and hostid of the last system to access a ZFS pool are stored in
   4 # the ZFS pool itself. A pool is foreign if, during `zpool import`, the
   5 # current hostname and hostid are different than the stored values thereof.
   6 #
   7 # The only way of having a stable hostid is to define it in /etc/hostid.
   8 # This postinst helper will check if we already have the hostid stabilized by
   9 # checking the existence of the file /etc/hostid to be 4 bytes at least.
  10 # If this file don't already exists on our system or has less than 4 bytes, then
  11 # a new (random) value is generated with zgenhostid (8) and stored in
  12 # /etc/hostid
  13
  14 if [ ! -f /etc/hostid ] || [ "$(stat -c %s /etc/hostid)" -lt 4 ] ; then
  15         zgenhostid
  16 fi
  17
  18 #DEBHELPER#
  19