preinst is in isc-dhcp-server 4.1.ESV-R4-0ubuntu5.10.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | #!/bin/sh
set -e
if dpkg --compare-versions "$2" lt 4.0 &&
[ -f /etc/default/dhcp3-server ] &&
[ ! -f /etc/default/isc-dhcp-server ]; then
echo "Copying /etc/default/dhcp3-server to /etc/default/isc-dhcp-server"
cp /etc/default/dhcp3-server /etc/default/isc-dhcp-server
fi
# Automatically added by dh_installinit
if [ "$1" = install ] || [ "$1" = upgrade ]; then
if [ -e "/etc/init.d/isc-dhcp-server" ] && [ ! -L "/etc/init.d/isc-dhcp-server" ]; then
if [ "`md5sum \"/etc/init.d/isc-dhcp-server\" | sed -e \"s/ .*//\"`" != \
"`dpkg-query -W -f='${Conffiles}' isc-dhcp-server | sed -n -e \"\\\\' /etc/init.d/isc-dhcp-server '{s/ obsolete$//;s/.* //p}\"`" ]
then
echo "Obsolete conffile /etc/init.d/isc-dhcp-server has been modified by you, renaming to .dpkg-bak"
mv -f "/etc/init.d/isc-dhcp-server" "/etc/init.d/isc-dhcp-server.dpkg-bak"
else
rm -f "/etc/init.d/isc-dhcp-server"
fi
fi
fi
# End automatically added section
# Automatically added by dh_installinit
if [ "$1" = install ] || [ "$1" = upgrade ]; then
if [ -e "/etc/init.d/isc-dhcp-server6" ] && [ ! -L "/etc/init.d/isc-dhcp-server6" ]; then
if [ "`md5sum \"/etc/init.d/isc-dhcp-server6\" | sed -e \"s/ .*//\"`" != \
"`dpkg-query -W -f='${Conffiles}' isc-dhcp-server | sed -n -e \"\\\\' /etc/init.d/isc-dhcp-server6 '{s/ obsolete$//;s/.* //p}\"`" ]
then
echo "Obsolete conffile /etc/init.d/isc-dhcp-server6 has been modified by you, renaming to .dpkg-bak"
mv -f "/etc/init.d/isc-dhcp-server6" "/etc/init.d/isc-dhcp-server6.dpkg-bak"
else
rm -f "/etc/init.d/isc-dhcp-server6"
fi
fi
fi
# End automatically added section
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