dee2ef0e31
based on Debian's packaging work, but simplified: - no DKMS and remove old patches which were based on top of Debian's packaging. Reviewed-by: Stoiko Ivanov <s.ivanov@proxmox.com> Tested-by: Stoiko Ivanov <s.ivanov@proxmox.com> Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
50 lines
2.0 KiB
Bash
50 lines
2.0 KiB
Bash
#!/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
|
|
|
|
# Detect if /etc/hostid is a conffile of previous spl package, migrate if yes
|
|
# hostid file should preserve even when package is purged
|
|
if $(dpkg-query --showformat='${Conffiles}\n' --show spl >/dev/null 2>&1); then
|
|
dpkg-maintscript-helper rm_conffile /etc/hostid -- "$@"
|
|
fi
|
|
|
|
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 -n I | od -to2 | awk 'FNR==1{ print substr($2,6,1)}' 2>/dev/null) = 0 ]; then
|
|
# Invoke the printf from coreutils. shell builtin lacks the byte format.
|
|
/usr/bin/printf "\x$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#
|