[zfsonlinux.git] / debian / zfsutils-linux.postinst

#!/bin/sh
set -e
# The hostname and hostid of the last system to access a ZFS pool are stored in
# the ZFS pool itself. A pool is foreign if, during `zpool import`, the
# current hostname and hostid are different than the stored values thereof.
#
# The only way of having a stable hostid is to define it in /etc/hostid.
# This postinst helper will check if we already have the hostid stabilized by
# checking the existence of the file /etc/hostid to be 4 bytes at least.
# If this file don't already exists on our system or has less than 4 bytes, then
# a new (random) value is generated with zgenhostid (8) and stored in
# /etc/hostid

if [ ! -f /etc/hostid ] || [ "$(stat -c %s /etc/hostid)" -lt 4 ] ; then
	zgenhostid
fi

#DEBHELPER#
Commit	Line	Data
5b9cd1ad SI	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