preinst is in syslog-ng-core 3.3.4.dfsg-2ubuntu1.
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 | #! /bin/sh
set -e
if [ "$1" = "install" -a -n "$2" ] ; then
[ -f /etc/logrotate.d/syslog-ng.disabled ] && mv -f /etc/logrotate.d/syslog-ng.disabled /etc/logrotate.d/syslog-ng
fi
exit 0
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