preinst is in isc-dhcp-server 4.2.4-7ubuntu12.
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 | #!/bin/sh
set -e
# 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" ] \
&& [ $(readlink -f "/etc/init.d/isc-dhcp-server") = /lib/init/upstart-job ]
then
rm -f "/etc/init.d/isc-dhcp-server"
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" ] \
&& [ $(readlink -f "/etc/init.d/isc-dhcp-server6") = /lib/init/upstart-job ]
then
rm -f "/etc/init.d/isc-dhcp-server6"
fi
fi
# End automatically added section
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