preinst is in libhtml-mason-perl 1:1.52-1.
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 | #!/bin/bash
set -e
##
# Create mason data directory
case "$1" in
configure)
webuser=www-data
webgroup=www-data
if [ "`getent passwd $webuser`" -a "`getent group $webgroup `" ]; then
chown $webuser:$webgroup /var/cache/mason/cache /var/cache/mason/obj
chmod 0700 /var/cache/mason/cache /var/cache/mason/obj
fi
;;
esac
exit 0
|