preinst is in proftpd-basic 1.3.5a-1build1.
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 | #!/bin/sh
set -e
# summary of how this script can be called:
# * <new-preinst> `install'
# * <new-preinst> `install' <old-version>
# * <new-preinst> `upgrade' <old-version>
# * <old-preinst> `abort-upgrade' <new-version>
#
if [ "$1" = "upgrade" ]; then
if [ -e /usr/sbin/invoke-rc.d ]; then
invoke-rc.d proftpd stop >/dev/null 2>&1 || true
else
/etc/init.d/proftpd stop >/dev/null 2>&1 || true
fi
# Scoreboard file format changed in 1.2.9
# Now stopping all inetd sessions and removing it to ensure
# a clean upgrade
if dpkg --compare-versions "$2" lt "1.2.9-1"; then
if [ `pgrep proftpd|wc -l` -ne 0 ]; then
pkill proftpd
sleep 2
fi
rm -f /run/proftpd/proftpd.scoreboard
fi
fi
exit 0
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