preinst is in xcwcp 3.5.1-2.
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 | #!/bin/sh
set -e
DOCLINK=/usr/share/doc/xcwcp
# Previously in version 2.3-13 $DOCLINK was a symlink to /usr/share/doc/unixcw.
# Removing this symlink must be handled explicitly so that
# the new version of the package can be placed into a real directory
# there otherwise the symlink will be preserved and the doc files
# will be missing after the install. This is required to upgrade
# from Squeeze to Wheezy. This may be removed after Wheezy.
if [ -h $DOCLINK ]; then
rm -f $DOCLINK
fi
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