#!/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 hostid on Solaris is intrinsic, but is not on Linux (see #595790), so the
-# spl kernel module invokes /usr/bin/hostid from the userland in its initialization
-# routine.
-#
-# /usr/bin/hostid will return the 4 first bytes of the file /etc/hostid.
-# If this file is not present or contains less than 4 bytes, then /usr/bin/hostid
-# will return the bytes of the IP address of $(hostname) flipped, or zero if
-# such IP couldn't be obtained
-#
-# This means that things like a DHCP lease change can affect the hostid.
-#
-# Therefore the only way of having a stable hostid is to define it on /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
-# we will stabilize our current hostid by writing its value to /etc/hostid
-# Run depmod first
+# Run depmod after module installation.
depmod
-# Deal with hostid issue as usual
-if [ ! -f /etc/hostid ] || [ $(stat -c %s /etc/hostid) -lt 4 ] ; then
-
- # Write our current hostid to /etc/hostid
- HOSTID=$(hostid)
- AA=$(echo $HOSTID | cut -b 1,2)
- BB=$(echo $HOSTID | cut -b 3,4)
- CC=$(echo $HOSTID | cut -b 5,6)
- DD=$(echo $HOSTID | cut -b 7,8)
-
- # Big Endian
- if echo | gcc -E -dM - | grep -q "__BYTE_ORDER__.*__ORDER_BIG_ENDIAN__"; then
- # Invoke the printf from coreutils. shell builtin lacks the byte format.
- /usr/bin/printf "\x$AA\x$BB\x$CC\x$DD" >/etc/hostid
- else
- # Little Endian
- /usr/bin/printf "\x$DD\x$CC\x$BB\x$AA" >/etc/hostid
- fi
-fi
-
#DEBHELPER#