preinst is in openafs-dbserver 1.6.7-1.
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 | #!/bin/sh
set -e
# In version 1.6.3-1, we switched from symlinking the doc directory to
# openafs-client to having our own doc directory so that we could weaken the
# versioned dependency. dpkg doesn't remove symlinks on upgrade, so we need
# to remove the symlink in preinst to avoid overwriting the old files.
#
# This cleanup can be removed after the jessie release.
test ! -L /usr/share/doc/openafs-dbserver \
|| rm /usr/share/doc/openafs-dbserver
|