preinst is in fetchmail 6.3.26-2.
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 | #!/bin/sh
#
# Preinst script for fetchmail
# $Id: fetchmail.preinst 486 2008-12-22 15:13:12Z nion $
#
set -e
# Remove a possibly fucked ip-up.d, which was unfortunately not
# removed due of being a conffile. This is ugly but the only "clean"
# way I see right now.
if [ -f /etc/network/if-up.d/fetchmail ] && [ "$2" = "6.2.4-3" ]; then
rm -f /etc/network/if-up.d/fetchmail
fi
exit 0
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