git.maemo.org Git - busybox-power/blob - debian/busybox-power.postinst

   1 #!/opt/busybox-power/busybox.power sh
   2 # A script to replace /bin/busybox and create missing symlinks to its applets.
   3 #
   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.
   9 #
  10 # NB The BusyBox binary needs to support the install applet.
  11 #
  12 # By Dennis Groenen <tj.groenen@gmail.com>
  13 # GPLv3 licensed
  14 #
  15
  16 INSTALLDIR="/opt/busybox-power"
  17 EXECPWR="$INSTALLDIR/busybox.power"
  18 DISTBIN="/bin/busybox.distrib"
  19
  20 VERBOSE="0"
  21 SYMLINK="1"
  22
  23 INSTBINARY_SHA1=`$EXECPWR sha1sum $EXECPWR | $EXECPWR awk '{ print $1 }'`
  24 ORIGBINARY_SHA1=`$EXECPWR sha1sum /bin/busybox | $EXECPWR awk '{ print $1 }'`
  25
  26 # Load shared functions
  27 source $INSTALLDIR/functions
  28
  29 # Check whether the applets file exists
  30 CHECK_APPLETSFILE() {
  31     if test ! -e $INSTALLDIR/applets; then
  32       echo "error: cannot find list of defined applets"
  33       exit 1
  34     fi
  35 }
  36
  37 # Check whether symlinks have been made before
  38 CHECK_SYMLINKSFILE() {
  39     if test -e $INSTALLDIR/busybox-power.symlinks; then
  40       ECHO_VERBOSE "symlinks are already made, skipping creation"
  41       SYMLINK="0"
  42     fi
  43 }
  44
  45 # Backup the original BusyBox binary
  46 BACKUP() {
  47     if test ! -e /bin/busybox; then
  48       # Scratchbox does not ship with BusyBox by default
  49       return
  50     fi
  51
  52     if test "$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
  57     fi
  58 }
  59
  60 # Rollback procedure for Harmattan based devices
  61 ROLLBACK_HARMATTAN() {
  62     echo -e "\nWarning: an error has occured! Rolling back..."
  63     $EXECPWR cp -af $TMPBINBAK /bin/busybox
  64     $EXECPWR cp -a $TMPHASHBAK /var/lib/aegis/refhashlist
  65     echo "End of roll-back"
  66     exit 1
  67 }
  68
  69 # Overwrite the installed binary with the enhanced binary
  70 # dpkg-divert is disallowed on Harmattan, do not use it there!
  71 INSTALL() {
  72     case $ENVIRONMENT in
  73       SDK|FREMANTLE)
  74         /usr/sbin/dpkg-divert --local --divert $DISTBIN /bin/busybox
  75         $EXECPWR cp -f $EXECPWR /bin/busybox
  76         ;;
  77       HARMATTAN)
  78         TMPHASHBAK=`$EXECPWR mktemp`
  79         TMPBINBAK=`$EXECPWR mktemp`
  80         ORIGINCHECK=`GETORIGINCHECK_STATUS`
  81
  82         # Useful information for Harmattan-based devices
  83         ECHO_VERBOSE "refhashlist backup: $TMPHASHBAK"
  84         ECHO_VERBOSE "busybox backup: $TMPBINBAK"
  85         ECHO_VERBOSE "instbinary: $INSTBINARY_SHA1"
  86         ECHO_VERBOSE "origbinary: $ORIGBINARY_SHA1"
  87         ECHO_VERBOSE "device mode: $DEVICEMODE"
  88         ECHO_VERBOSE "origincheck: $ORIGINCHECK"
  89
  90         if test $ORIGINCHECK -eq 1; then
  91           SETORIGINCHECK_STATUS 0; fi
  92
  93         $EXECPWR cp -a /bin/busybox $TMPBINBAK || exit 1
  94         $EXECPWR cp -a /var/lib/aegis/refhashlist $TMPHASHBAK || exit 1
  95         $EXECPWR cp -af $EXECPWR /bin/busybox || ROLLBACK_HARMATTAN
  96         $EXECPWR sed -i "s/$ORIGBINARY_SHA1/$INSTBINARY_SHA1/" /var/lib/aegis/refhashlist || ROLLBACK_HARMATTAN
  97         /usr/bin/accli -c tcb-sign -F /var/lib/aegis/refhashlist < /var/lib/aegis/refhashlist || ROLLBACK_HARMATTAN
  98         /usr/sbin/validator-init
  99
 100         if test $ORIGINCHECK -eq 1; then
 101           SETORIGINCHECK_STATUS 1; fi
 102
 103         $EXECPWR rm $TMPBINBAK
 104         $EXECPWR rm $TMPHASHBAK
 105         ;;
 106     esac
 107 }
 108
 109 # Create missing symlinks to the enhanced binary
 110 SYMLINK() {
 111     # Load defined BusyBox applets
 112     source $INSTALLDIR/applets
 113
 114     # Get a list of supported applets by busybox-power
 115     if test -d /tmp/busybox-power; then
 116       $EXECPWR rm -Rf /tmp/busybox-power; fi
 117     $EXECPWR mkdir -p /tmp/busybox-power
 118     $EXECPWR --install -s /tmp/busybox-power
 119     $EXECPWR ls /tmp/busybox-power/ > $INSTALLDIR/applets_supported
 120     $EXECPWR rm -Rf /tmp/busybox-power
 121
 122     # Prepare file that will keep track of installed symlinks by busybox-power
 123     echo "# Automatically generated by busybox-power. DO NOT EDIT" > $INSTALLDIR/busybox-power.symlinks
 124     echo -e "\nDESTINATIONS=\"$DESTINATIONS\"" >> $INSTALLDIR/busybox-power.symlinks
 125     echo -e "\n# Installed symlinks" >> $INSTALLDIR/busybox-power.symlinks
 126
 127     # Walk through all possible destinations
 128     for DESTDIR in $DESTINATIONS; do
 129       # Enable us to see all entries in $DESTINATION as variables
 130       eval "APPLICATIONS=\$$DESTDIR"
 131
 132       # Set destination directory accordingly
 133       case $DESTDIR in
 134         DEST_BIN)
 135           DIR="/bin"
 136           ;;
 137         DEST_SBIN)
 138           DIR="/sbin"
 139           ;;
 140         DEST_USRBIN)
 141           DIR="/usr/bin"
 142           ;;
 143         DEST_USRSBIN)
 144           DIR="/usr/sbin"
 145           ;;
 146       esac
 147
 148       # Keep track of installed symlinks per destination
 149       SYMLINKS="$DESTDIR=\""
 150
 151       ECHO_VERBOSE "\nSymlinking applets in $DIR"
 152       # Walk through all applications from the current destination
 153       for APP in $APPLICATIONS; do
 154         # The following code is executed for all applets in the current destination
 155         if test ! -e $DIR/$APP; then
 156           # Check whether the applet is supported by the busybox binary
 157           if `$EXECPWR grep -Fq "$APP" $INSTALLDIR/applets_supported`; then
 158             ECHO_VERBOSE "Symlinking: /bin/busybox -> $DIR/$APP"
 159             $EXECPWR ln -s /bin/busybox $DIR/$APP
 160             SYMLINKS="$SYMLINKS $APP"
 161           fi
 162         fi
 163       done
 164
 165       # Write out installed symlinks
 166       echo "$SYMLINKS\"" >> $INSTALLDIR/busybox-power.symlinks
 167     done
 168
 169     $EXECPWR rm $INSTALLDIR/applets_supported
 170 }
 171
 172 ### Codepath ###
 173 ECHO_VERBOSE "busybox-power: verbose mode"
 174 ECHO_VERBOSE "  binary: $EXECPWR"
 175 ECHO_VERBOSE "  version string: `$EXECPWR | $EXECPWR head -n 1`"
 176 CHECK_ENV && ECHO_VERBOSE "  environment: $ENVIRONMENT"
 177
 178 CHECK_APPLETSFILE
 179 CHECK_SYMLINKSFILE
 180 if test "$ENVIRONMENT" != "SDK"; then
 181   CHECK_ROOT
 182 fi
 183 BACKUP
 184 INSTALL
 185 if test $SYMLINK == 1; then
 186   SYMLINK
 187 fi
 188