1 #!/opt/busybox-power/busybox.power sh
2 # A script to replace /bin/busybox and create missing symlinks to its applets.
4 # The target directories for BusyBox' applets are defined in the "applets" file.
5 # This script will only create symbolic links when 1) they do not already exist
6 # in the filesystem, and 2) the BusyBox binary supports the applet. A list of
7 # all made symbolic links is written out to the file "busybox-power.symlinks",
8 # which will be used during uninstallation of busybox-power.
10 # NB The BusyBox binary needs to support the install applet.
12 # By Dennis Groenen <tj.groenen@gmail.com>
16 INSTALLDIR="/opt/busybox-power"
17 EXECPWR="$INSTALLDIR/busybox.power"
18 DISTBIN="/bin/busybox.distrib"
23 INSTBINARY_SHA1=`$EXECPWR sha1sum $EXECPWR | $EXECPWR awk '{ print $1 }'`
24 ORIGBINARY_SHA1=`$EXECPWR sha1sum /bin/busybox | $EXECPWR awk '{ print $1 }'`
26 # Load shared functions
27 source $INSTALLDIR/functions
29 # Check whether the applets file exists
31 if test ! -e $INSTALLDIR/applets; then
32 echo "error: cannot find list of defined applets"
37 # Check whether symlinks have been made before
38 CHECK_SYMLINKSFILE() {
39 if test -e $INSTALLDIR/busybox-power.symlinks; then
40 ECHO_VERBOSE "symlinks are already made, skipping creation"
45 # Backup the original BusyBox binary
47 if test ! -e /bin/busybox; then
48 # Scratchbox does not ship with BusyBox by default
52 if test "$INSTBINARY_SHA1" != "$ORIGBINARY_SHA1"; then
53 $EXECPWR cp -a /bin/busybox $DISTBIN
54 $EXECPWR sha1sum $DISTBIN | $EXECPWR awk '{ print $1 }' \
55 > $INSTALLDIR/busybox.distrib.sha1
56 GETBBVERSION > $INSTALLDIR/busybox.distrib.version
60 # Overwrite the installed binary with the enhanced binary
62 /usr/sbin/dpkg-divert --local --divert $DISTBIN /bin/busybox
63 $EXECPWR cp -f $EXECPWR /bin/busybox
66 # Create missing symlinks to the enhanced binary
68 # Load defined BusyBox applets
69 source $INSTALLDIR/applets
71 # Get a list of supported applets by busybox-power
72 if test -d /tmp/busybox-power; then
73 $EXECPWR rm -Rf /tmp/busybox-power; fi
74 $EXECPWR mkdir -p /tmp/busybox-power
75 $EXECPWR --install -s /tmp/busybox-power
76 $EXECPWR ls /tmp/busybox-power/ > $INSTALLDIR/applets_supported
77 $EXECPWR rm -Rf /tmp/busybox-power
79 # Prepare file that will keep track of installed symlinks by busybox-power
80 echo "# Automatically generated by busybox-power. DO NOT EDIT" > $INSTALLDIR/busybox-power.symlinks
81 echo -e "\nDESTINATIONS=\"$DESTINATIONS\"" >> $INSTALLDIR/busybox-power.symlinks
82 echo -e "\n# Installed symlinks" >> $INSTALLDIR/busybox-power.symlinks
84 # Walk through all possible destinations
85 for DESTDIR in $DESTINATIONS; do
86 # Enable us to see all entries in $DESTINATION as variables
87 eval "APPLICATIONS=\$$DESTDIR"
89 # Set destination directory accordingly
105 # Keep track of installed symlinks per destination
106 SYMLINKS="$DESTDIR=\""
108 ECHO_VERBOSE "\nSymlinking applets in $DIR"
109 # Walk through all applications from the current destination
110 for APP in $APPLICATIONS; do
111 # The following code is executed for all applets in the current destination
112 if test ! -e $DIR/$APP; then
113 # Check whether the applet is supported by the busybox binary
114 if `$EXECPWR grep -Fq "$APP" $INSTALLDIR/applets_supported`; then
115 ECHO_VERBOSE "Symlinking: /bin/busybox -> $DIR/$APP"
116 $EXECPWR ln -s /bin/busybox $DIR/$APP
117 SYMLINKS="$SYMLINKS $APP"
122 # Write out installed symlinks
123 echo "$SYMLINKS\"" >> $INSTALLDIR/busybox-power.symlinks
126 $EXECPWR rm $INSTALLDIR/applets_supported
130 ECHO_VERBOSE "busybox-power: verbose mode"
131 ECHO_VERBOSE " binary: $EXECPWR"
132 ECHO_VERBOSE " version string: `$EXECPWR | $EXECPWR head -n 1`"
133 CHECK_ENV && ECHO_VERBOSE " environment: $ENVIRONMENT"
137 if test "$ENVIRONMENT" != "SDK"; then
142 if test $SYMLINK == 1; then