preinst is in bcache-tools 1.0.8-2.
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 19 20 21 22 23 24 | #!/bin/sh
oldscript=/etc/initramfs-tools/hooks/bcache
dpkg-maintscript-helper rm_conffile $oldscript 1.0.1-1~ -- "$@"
case "$1" in
install|upgrade)
if [ -f $oldscript ]; then
for hash in ca5a1c3f716e3ec69057f657cb79cee2f47c7ef6619983d86e647ac1f9f1f099 \
74c5338e21c926d3cbbc1b44c5525667dc964fe91189ffa6b11352974ef56950
do
if echo "$hash $oldscript" |
sha256sum --check --status -; then
# Old conffile was not modified, let's just remove it
rm -f $oldscript
fi
done
if [ -f $oldscript ]; then
# Otherwise, disable and rename it
chmod -x $oldscript
mv $oldscript $oldscript.dpkg-remove
fi
fi
;;
esac
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