+# A script to restore /bin/busybox and delete the symlinks made during
+# installation.
+#
+# Symbolic links to applets are only removed if they are
+# 1) created by the installer script ("install-binary.sh")
+# 2) not replaced by a binary (i.e. they are still a symbolic link)
+# 3) pointing to a busybox binary
+#
+# By Dennis Groenen <tj.groenen@gmail.com>
+# GPLv3 licensed
+#
+
+INSTALLDIR="/opt/busybox-power"
+EXECPWR="$INSTALLDIR/busybox.power"
+DISTBIN="/bin/busybox.distrib"
+
+VERBOSE="0"
+MODIFIEDBIN="0"
+
+INSTBINARY_SHA1=`sha1sum $EXECPWR | awk '{ print $1 }'`
+if test -e $DISTBIN; then
+ ORIGBINARY_SHA1=`sha1sum $DISTBIN | awk '{ print $1 }'`; fi
+
+# Load shared functions
+source $INSTALLDIR/functions
+
+# Check whether we can load the list of created symlinks during installation
+CHECK_SYMLINKSFILE() {
+ if test ! -e $INSTALLDIR/busybox-power.symlinks; then
+ echo -e "Warning: cannot find the list of symlinks to be removed. No" \
+ "symlinks will be removed at all!\n" >> /tmp/busybox-power-error
+ fi
+}
+
+# Check the (integrity) of our BusyBox backup
+CHECK_BACKUP() {
+ # Firstly, check whether the backup still exists
+ if test ! -e $DISTBIN; then
+ if test "$ENVIRONMENT" == "SDK"; then return; fi # SDK comes without BB
+ echo -e "Warning: the backup of the original BusyBox binary is missing!" \
+ "/bin/busybox will not be touched.\n" >> /tmp/busybox-power-error
+ return
+ fi
+
+ # Secondly, check the integrity of the backup
+ if test -e $INSTALLDIR/busybox.distrib.sha1; then
+ if test "`cat $INSTALLDIR/busybox.distrib.sha1`" != "$ORIGBINARY_SHA1"; then
+ if test "`cat $INSTALLDIR/busybox.distrib.version`" == "`GETBBVERSION`"; then
+ # The backup has been changed whilst busybox hasn't been upgraded
+ echo -e "Warning: the backup of the original BusyBox binary has" \
+ "been modified since installing busybox-power (invalid SHA1" \
+ "checksum). Do not continue unless you're sure that $DISTBIN" \
+ "is not corrupted.\n" >> /tmp/busybox-power-error
+ fi
+ fi
+ else
+ echo -e "Warning: could not load the saved SHA1 checksum of the backup" \
+ "of the original BusyBox binary; the integrity of the backup of the" \
+ "original binary can not be guaranteed.\n" >> /tmp/busybox-power-error
+ fi
+}
+
+# Check whether /bin/busybox has been modified after bb-power's installation
+CHECK_INSTALLEDBIN() {
+ if test "$INSTBINARY_SHA1" != "`sha1sum /bin/busybox | awk '{ print $1 }'`"; then
+ echo -e "Warning: /bin/busybox has been modified since installing" \
+ "busybox-power (invalid SHA1 checksum). Your current /bin/busybox" \
+ "won't be touched and the diversion of /bin/busybox to $DISTBIN will" \
+ "not be removed. \n" >> /tmp/busybox-power-error
+ MODIFIEDBIN="1"
+ fi
+}
+
+# Display encountered errors
+DISPLAY_ERRORS() {
+ case $ENVIRONMENT in
+ SDK)
+ echo -e "\n\n-----------Attention!-----------"
+ cat /tmp/busybox-power-error
+ rm /tmp/busybox-power-error
+ echo "-> Please press [enter] to ignore the above errors/warnings."
+ echo " Hit [ctrl-c] to break"
+ read
+ ;;
+ FREMANTLE)
+ echo "Click \"I Agree\" to ignore the above errors/warnings. Ask for" \
+ "help if you don't know what to do." >> /tmp/busybox-power-error
+ echo "Please confirm the text on the screen of your device"
+ maemo-confirm-text "Attention!" /tmp/busybox-power-error
+ res=$?
+ rm /tmp/busybox-power-error
+ if test ! $res == 0; then exit 1; fi
+ ;;
+ esac
+}
+
+# Uninstallation of the enhanced binary
+UNINSTALL() {
+ if test $MODIFIEDBIN == 1; then
+ # /bin/busybox has been modified since installing busybox-power
+ # Leave both the file and the diversion in place
+ return
+ elif test -e $DISTBIN; then
+ cp -af $DISTBIN /bin/busybox
+ if test -e /bin/busybox; then
+ rm $DISTBIN; fi
+ elif test "$ENVIRONMENT" == "SDK"; then
+ # There was no /bin/busybox to begin with..
+ rm /bin/busybox
+ fi
+
+ /usr/sbin/dpkg-divert --remove /bin/busybox
+}
+
+# Remove all symlinks that the installation script has made
+UNSYMLINK() {
+ # Load list of installed symlinks
+ touch $INSTALLDIR/busybox-power.symlinks
+ source $INSTALLDIR/busybox-power.symlinks
+
+ # Walk through all possible destinations
+ for DESTDIR in $DESTINATIONS; do
+ # Enable us to see all entries in $DESTINATIONS as variables
+ eval "APPLICATIONS=\$$DESTDIR"
+ # Set destination directory accordingly
+ case $DESTDIR in
+ DEST_BIN)
+ DIR="/bin"
+ ;;
+ DEST_SBIN)
+ DIR="/sbin"
+ ;;
+ DEST_USRBIN)
+ DIR="/usr/bin"
+ ;;
+ DEST_USRSBIN)
+ DIR="/usr/sbin"
+ ;;
+ esac
+
+ ECHO_VERBOSE "\nRemoving symlinks in $DIR"
+ # Walk through all applications from the current destination
+ for APP in $APPLICATIONS; do
+ # The following code is executed for every application in the current
+ # destination
+ if test -h $DIR/$APP; then
+ # Good, this app is still a symbolic link ..
+ if test -n "`ls -l $DIR/$APP | grep busybox`"; then
+ ECHO_VERBOSE "Removing link: $DIR/$APP"
+ rm $DIR/$APP
+ fi
+ fi
+ done
+ done
+}
+
+# Action to be performed after restoring original busybox
+CLEANUP() {
+ OLDFILES="busybox-power.symlinks
+ busybox.distrib.version
+ busybox.distrib.sha1"
+
+ for file in $OLDFILES; do
+ if test -e $INSTALLDIR/$file; then
+ rm $INSTALLDIR/$file
+ fi
+ done
+
+ # Clean up trap (from busybox-power <= 1.20.2power1)
+ # Should be removed by the old prerm, but may be left behind when that one
+ # fails and dpkg uses this one instead. Therefore, keep this cleanup
+ # included for a few busybox-power releases.
+ line="trap exit SIGHUP #by busybox-power"
+ if grep -F -q "$line" /etc/profile; then
+ sed "/$line/d" /etc/profile > /tmp/profile.sed
+ mv /tmp/profile.sed /etc/profile
+ fi
+}
+
+### Codepath ###
+ECHO_VERBOSE "busybox-power: verbose mode"
+ECHO_VERBOSE " binary: $EXECPWR"
+ECHO_VERBOSE " version string: `$EXECPWR | $EXECPWR head -n 1`"
+CHECK_ENV && ECHO_VERBOSE " environment: $ENVIRONMENT"
+
+CHECK_STANDALONE
+CHECK_SYMLINKSFILE
+if test "$ENVIRONMENT" != "SDK"; then
+ CHECK_ROOT
+ CHECK_BACKUP
+ CHECK_INSTALLEDBIN
+fi
+if test -e /tmp/busybox-power-error; then
+ # An error has occured during the checks
+ DISPLAY_ERRORS
projects / busybox-power / commitdiff