-#!/bin/sh
-set -e
-
-# Get the configuration from /etc/apt/apt.conf
-OPTS="-f"
-APTGET="/usr/bin/apt-get"
-APTCACHE="/usr/bin/apt-cache"
-DPKG="/usr/bin/dpkg"
-CACHEDIR="/var/cache/apt"
-PROMPT="no"
-RES=`apt-config shell OPTS DSelect::UpdateOptions \
- DPKG Dir::Bin::dpkg APTGET Dir::Bin::apt-get \
- APTCACHE Dir::Bin::apt-cache CACHEDIR Dir::Cache \
- PROMPT DSelect::PromptAfterUpdate`
-eval $RES
-
-$APTGET $OPTS update
-
-echo "Merging Available information"
-rm -f /var/cache/apt/available
-$APTCACHE dumpavail > $CACHEDIR/available
-$DPKG --update-avail $CACHEDIR/available
-rm -f $CACHEDIR/available
-
-if [ $PROMPT = "yes" ]; then
- echo "Press enter to continue." && read RES;
-fi
-
-exit 0
+#!/bin/sh
+set -e
+
+# Get the configuration from /etc/apt/apt.conf
+CLEAN="prompt"
+OPTS="-f"
+APTGET="/usr/bin/apt-get"
+APTCACHE="/usr/bin/apt-cache"
+DPKG="/usr/bin/dpkg"
+DPKG_OPTS="--admindir=$1"
+APT_OPT0="-oDir::State::status=$1/status"
+APT_OPT1="-oDPkg::Options::=$DPKG_OPTS"
+CACHEDIR="/var/cache/apt"
+PROMPT="false"
+RES=`apt-config shell CLEAN DSelect::Clean OPTS DSelect::UpdateOptions \
+ DPKG Dir::Bin::dpkg/f APTGET Dir::Bin::apt-get/f \
+ APTCACHE Dir::Bin::apt-cache/f CACHEDIR Dir::Cache/d \
+ PROMPT DSelect::PromptAfterUpdate/b`
+eval $RES
+
+# It looks slightly ugly to have a double / in the dpkg output
+CACHEDIR=`echo $CACHEDIR | sed -e "s|/$||"`
+
+STATUS=1
+if $APTGET $OPTS "$APT_OPT0" "$APT_OPT1" update
+then
+ echo "Merging Available information"
+ rm -f $CACHEDIR/available
+ $APTCACHE dumpavail > $CACHEDIR/available
+ $DPKG "$DPKG_OPTS" --update-avail $CACHEDIR/available
+ rm -f $CACHEDIR/available
+
+ case "$CLEAN" in
+ Pre-Auto|PreAuto|pre-auto)
+ $APTGET "$APT_OPT0" "$APT_OPT1" autoclean;;
+ esac
+
+ STATUS=0
+fi
+
+if [ x$PROMPT = "xtrue" ]; then
+ echo "Press enter to continue." && read RES;
+fi
+
+exit $STATUS