#!/bin/sh
-# A script to restore /bin/busybox and delete created symlinks as defined in $INSTALLDIR/installed-symlinks
+# A script to restore /bin/busybox and delete the symlinks made during
+# installation.
#
-# Symbolic links are only removed if they are
-# a) created by the installer script ("install-binary.sh")
-# b) not replaced by a binary (i.e. they are still a symbolic link)
-# c) pointing to a busybox binary
-
-# By Dennis Groenen <dennis_groenen@hotmail.com>
+# Symbolic links to applets are only removed if they are
+# 1) created by the installer script ("install-binary.sh")
+# 2) not replaced by a binary (i.e. they are still a symbolic link)
+# 3) pointing to a busybox binary
+#
+# By Dennis Groenen <tj.groenen@gmail.com>
# GPLv3 licensed
-
-# Version 0.3 06-03-2011 (MM-DD-YYYY)
-# 0.1: Initial release
-# 0.2: Minor clean-ups and be quieter
-# 0.3: Add support for multiple environments
-# Make use of functions in this script
-# Implement additional checks
+#
INSTALLDIR="/opt/busybox-power"
EXECPWR="$INSTALLDIR/busybox.power"
+DISTBIN="/bin/busybox.distrib"
VERBOSE="0"
+MODIFIEDBIN="0"
-# Print extra information in verbose mode
-if test $VERBOSE == 1; then
- echo "busybox-power: verbose mode" \
- echo " binary: $EXECPWR" \
- echo " version string: `$EXECPWR | $EXECPWR head -n 1`"
-fi
-
-# Detect environment
-CHECK_ENV() {
- if test -d /scratchbox
- then
- ENVIRONMENT="SDK"
- else
- PROD=$(cat /proc/component_version | grep product | cut -d" " -f 6)
- case $PROD in
- RX-51)
- ENVIRONMENT="N900"
- ;;
- *)
- # Unsupported, use the least strict environment (SDK)
- ENVIRONMENT="SDK"
- ;;
- esac
- fi
-
- if test $VERBOSE == 1; then echo " environment: $ENVIRONMENT"; fi
-}
+INSTBINARY_SHA1=`sha1sum $EXECPWR | awk '{ print $1 }'`
+if test -e $DISTBIN; then
+ ORIGBINARY_SHA1=`sha1sum $DISTBIN | awk '{ print $1 }'`; fi
-# Environment-independent checks before continuing
-GENERIC_CHECKS() {
- #if test -n "`pgrep dpkg`" -o "`pgrep apt`"
- if ! lsof /var/lib/dpkg/lock >> /dev/null; then
- echo "error: you're running me as a stand-alone application"
- echo " do not do this, I will be called automatically upon"
- echo " deinstallation of busybox-power"
- exit 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 "Error: cannot find the list of symlinks to be removed. No symlinks will be removed at all!\n" >> /tmp/busybox-power-error
fi
}
-# Additional checks for the N900
-E_N900_CHECKS() {
- if test "`id -u`" -ne 0; then
- echo "error: you're not running me as root, aborting"
- echo " also, DO NOT run me as a stand-alone application"
- echo " I will be called automatically upon deinstallation"
- echo " of busybox-power"
- exit 1
- fi
+# Check the (integrity) of our BusyBox backup
+CHECK_BACKUP() {
+ # SDK doesn't ship with BusyBox by default, there might be no backup at all
+ if test ! -e $DISTBIN -a "$ENVIRONMENT" == "SDK" ; then
+ return; fi
- if test ! -e $INSTALLDIR/busybox.original; then
+ # Firstly, check whether the backup still exists
+ if test ! -e $DISTBIN; then
echo -e "Error: original binary is missing! Continuing will only remove the symlinks made during installation, /bin/busybox stays untouched.\n" >> /tmp/busybox-power-error
+ return
fi
-}
-# N900-specific code executed prior to uninstalling the enhanced binary
-E_N900_PRERM() {
- if test -e $INSTALLDIR/busybox.power.md5
- then
- INSTBINARY_MD5=`md5sum /bin/busybox | awk '{ print $1 }'`
- ORIGBINARY_MD5=`cat $INSTALLDIR/busybox.power.md5`
- if test ! "$INSTBINARY_MD5" == "$ORIGBINARY_MD5"; then
- echo -e "Warning: /bin/busybox has been modified since installing busybox-power (invalid md5 checksum). The original BusyBox binary at the time of installation will replace it if you continue.\n" >> /tmp/busybox-power-error
- 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
+ echo -e "Warning: the backed-up original binary has been modified since installing busybox-power (invalid SHA1 checksum). Do not continue unless you're sure $DISTBIN isn't corrupted.\n" >> /tmp/busybox-power-error
+ fi
+ else
+ echo -e "Warning: couldn't load the saved SHA1 checksum of the original binary; the integrity of the backup of the original binary can not be guaranteed.\n" >> /tmp/busybox-power-error
fi
+}
- if test -e $INSTALLDIR/busybox.original.md5
- then
- INSTBINARY_MD5=`cat $INSTALLDIR/busybox.original.md5`
- ORIGBINARY_MD5=`md5sum $INSTALLDIR/busybox.original | awk '{ print $1 }'`
- if test ! "$INSTBINARY_MD5" == "$ORIGBINARY_MD5"; then
- echo -e "Warning: the backed-up original binary has been modified since installing busybox-power (invalid md5 checksum). Do not continue unless you're sure $INSTALLDIR/busybox.original isn't corrupted.\n" >> /tmp/busybox-power-error
- fi
- else
- echo -e "Warning: couldn't load the saved md5 checksum of the original binary; the integrity of the backup of the original binary can not be guaranteed.\n" >> /tmp/busybox-power-error
+# Check whether /bin/busybox has been modified after bb-power's installation
+CHECK_INSTALLEDBIN() {
+ if test ! "$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. Hit [ctrl-c] to break"
- read
+ case $ENVIRONMENT in
+ SDK)
+ echo -e "\n\n-----------Attention!-----------"
+ cat /tmp/busybox-power-error
+ rm /tmp/busybox-power-error
+ echo "-> Please press [enter] to ignore the above errors/warnings."
+ echo " Hit [ctrl-c] to break"
+ read
;;
- N900)
- echo "Click \"I Agree\" to ignore the above errors/warnings. Ask for help if you don't know what to do." >> /tmp/busybox-power-error
- maemo-confirm-text "Attention!" /tmp/busybox-power-error
- res=$?
- rm /tmp/busybox-power-error
- if test ! $res == 0; then exit 1; fi
+ FREMANTLE)
+ echo "Click \"I Agree\" to ignore the above errors/warnings. Ask for help if you don't know what to do." >> /tmp/busybox-power-error
+ echo "Please confirm the text on the screen of your device"
+ maemo-confirm-text "Attention!" /tmp/busybox-power-error
+ res=$?
+ rm /tmp/busybox-power-error
+ if test ! $res == 0; then exit 1; fi
;;
esac
-
- touch $INSTALLDIR/busybox-power.symlinks
}
-# Uninstallation of the enhanced binary on the N900
-E_N900_UNINST() {
- if test -e $INSTALLDIR/busybox.original
- then
- cp -f $INSTALLDIR/busybox.original /bin/busybox
- if test -e /bin/busybox; then rm $INSTALLDIR/busybox.original; fi
- fi
-}
-
-# Uninstallation of the enhanced binary in Maemo's SDK
-E_SDK_UNINST() {
- if test -e $INSTALLDIR/busybox.original
- then
- cp -f $INSTALLDIR/busybox.original /bin/busybox
- if test -e /bin/busybox; then rm $INSTALLDIR/busybox.original; fi
- else
- rm /bin/busybox
+# 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 busybox-power has made
+# 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 $DESTIONATION as variables
- eval "APPLICATIONS=\$$DESTDIR"
- # Set destination dirrectory accordingly
- case $DESTDIR in
- DEST_BIN)
- DIR="/bin"
+ 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_SBIN)
+ DIR="/sbin"
;;
- DEST_USRBIN)
- DIR="/usr/bin"
+ DEST_USRBIN)
+ DIR="/usr/bin"
;;
- DEST_USRSBIN)
- DIR="/usr/sbin"
+ DEST_USRSBIN)
+ DIR="/usr/sbin"
;;
- esac
+ esac
- if test $VERBOSE == 1; then echo -e "\nRemoving symlinks in $DIR"; fi
+ 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 # Check if the app is a symbolic link
- then
- if test -n "`ls -l $DIR/$APP | grep busybox`" # Check if the symbolic link points to busybox
- then
- if test $VERBOSE == 1; then echo "Removing link: $DIR/$APP"; fi
- rm $DIR/$APP
- fi
+ 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
-POST_UNINST() {
+CLEANUP() {
OLDFILES="busybox-power.symlinks
- busybox.power.md5
- busybox.original.md5"
-
- for file in $OLDFILES
- do
- if test -e $INSTALLDIR/$file; then
- rm $INSTALLDIR/$file
- fi
- done
+ busybox.distrib.sha1"
+
+ for file in $OLDFILES; do
+ if test -e $INSTALLDIR/$file; then
+ rm $INSTALLDIR/$file
+ fi
+ done
}
### Codepath ###
-CHECK_ENV
-GENERIC_CHECKS
-case $ENVIRONMENT in
- SDK)
- # Check for errors before restoring BusyBox
- if test -e /tmp/busybox-power-error
- then DISPLAY_ERRORS; fi
- E_SDK_UNINST
- ;;
- N900)
- E_N900_CHECKS
- E_N900_PRERM
- # Check for errors before restoring BusyBox
- if test -e /tmp/busybox-power-error
- then DISPLAY_ERRORS; fi
- E_N900_UNINST
- ;;
-esac
+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
+fi
UNSYMLINK
-POST_UNINST
+UNINSTALL
+CLEANUP
projects / busybox-power / blobdiff