preinst is in linux-wlan-ng 0.2.9+dfsg-5.
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 | #!/bin/sh -e
rm_conffile()
{
CONFFILE="$1"
if [ -e "$CONFFILE" ]; then
md5sum=`md5sum "$CONFFILE" | cut -d ' ' -f 1`
old_md5sum=`dpkg-query -W -f='${Conffiles}' linux-wlan-ng | grep $CONFFILE | cut -d ' ' -f 3`
if [ "$md5sum" != "$old_md5sum" ]; then
echo "Obsolete conffile $CONFFILE has been modified by you, renaming to .dpkg-bak"
mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
else
echo "Removing obsolete conffile $CONFFILE"
rm -f "$CONFFILE"
fi
fi
}
# Uncomment when debian completely drops #HOTPLUG#
if [ "$1" = install -o "$1" = upgrade ]; then
if dpkg --compare-versions "$2" lt "0.2.8+svn1839+dfsg-2"; then
rm_conffile /etc/hotplug/wlan.agent
fi
fi
# The old modutils file could be there
if [ "$1" = install -o "$1" = upgrade ]; then
if dpkg --compare-versions "$2" lt "0.2.8+svn1839+dfsg-3"; then
rm_conffile /etc/modutils/linux-wlan-ng
fi
fi
# udev rules have moved to /lib/udev
if [ "$1" = install -o "$1" = upgrade ]; then
if dpkg --compare-versions "$2" lt "0.2.9+dfsg-3"; then
rm_conffile /etc/udev/rules.d/84-linux-wlan-ng.rules
fi
fi
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