preinst is in libsane-extras 1.0.22.2.
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 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #!/bin/sh
set -e
# From http://wiki.debian.org/DpkgConffileHandling
# Remove a no-longer used conffile
rm_conffile() {
PKGNAME="$1"
CONFFILE="$2"
if [ -e "$CONFFILE" ]; then
md5sum="`md5sum \"$CONFFILE\" | sed -e \"s/ .*//\"`"
old_md5sum="`dpkg-query -W -f='${Conffiles}' $PKGNAME | sed -n -e \"\\\\' $CONFFILE '{s/ obsolete$//;s/.* //p}\"`"
if [ "$md5sum" != "$old_md5sum" ]; then
echo "Obsolete conffile $CONFFILE has been modified by you."
echo "Saving as $CONFFILE.dpkg-bak ..."
mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
else
echo "Removing obsolete conffile $CONFFILE ..."
rm -f "$CONFFILE"
fi
fi
}
## Transition from the old-style udev setup to the old-style dh_installudev setup
## Then dh_installudev will take care of the transition to the new dh_installudev setup
if [ "$1" = install ] || [ "$1" = upgrade ]; then
if [ -e "/etc/udev/rules.d/025_libsane-extras.rules" ]; then
mv /etc/udev/rules.d/025_libsane-extras.rules /etc/udev/rules.d/z60_libsane-extras.rules
fi
## Remove obsolete /etc/sane.d/epkowa.conf conffile
if dpkg --compare-versions "$2" le "1.0.19.14"; then
## iscan not installed
if ! dpkg-query -W -f '${Status}\n' iscan > /dev/null 2>&1; then
rm_conffile libsane-extras /etc/sane.d/epkowa.conf
fi
fi
## Remove obsolete /etc/sane.d/hp_rts88xx.conf
if dpkg --compare-versions "$2" le "1.0.19.16"; then
rm_conffile libsane-extras /etc/sane.d/hp_rts88xx.conf
fi
fi
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