Last Updated on Dec 26, 2022

Welcome to egingell’s SGS2 info page

You’re here because you’re curious about what I have done to my phone, otherwise you wouldn’t have clicked. Well, read on.

• Use Link2SD Without a Second Partition – E4GT
• Clean up Link2SD’s Trail.
• Copy Multi DPI Google Play Store and Google Services Framework
  apps to system compensating for the /preload partition.
• Delete Bloatware – SGS2

• My ROM: Stock Rooted Jelly Bean 4.1.2-GB27 – I’m sticking with stock until Samsung allows one-click toggling of WiMAX.
• Recovery: Stock GB27 – I have no need or desire to flash a custom Recovery. You can do everything a Recovery can do from a live boot.
  That’s right, kids, one can clear the dalvik cache, clear all app data, clear the cache, and push files to /system or /preload without using
  a custom recovery. You can even flash a modem, recovery, or kernel. I use
  Root Explorer. The latest version incorporates a SMB client, so I can get files from my PC easily and paste them directy to whichever
  protected directory I want and set appropriate permissions. I use ADB only when I don’t want to type out shell commands on the phone’s
  tiny keyboard or “oops” emergencies.
• I have enabled init.d boot up scripts by renaming ‘/system/bin/debuggerd’ to ‘/system/bin/debuggerd.bin’ and I’m using ‘/system/bin/debuggerd’
  as a middle-man script for the debugger daemon to use busybox’s ‘run-parts’ to execute the scripts in ‘/data/local/init.d’
  as well as do the mounting and binding and then execute ‘/system/bin/debuggerd.bin’.
• I lifted ‘/system/bin/bootanimation’ from rujelus22’s Blu Kuban – JB ROM
  and replaced the original with it to enable custom boot animations.
• I changed my boot splash screen using Hellcat’s SGS2
  BootScreen Changer.
• My SanDisk 32GB SDHC card is layed out thusly:

  root@android:/ # cat /sdcard/extSdCardInfo.txt
                       Device   Blocks Info
  /dev/block/cyasblkdevblk0p1 30843904 ->/storage/sdcard0
  /dev/block/cyasblkdevblk0p2   320512 x>/storage/extSdCard - not mounted
  root@android:/ #

• My internal SD card is layed out thisly:

  root@android:/ # cat /sdcard/intSdCardInfo.txt
                 Device   Blocks Info
   /dev/block/mmcblk0p1    20480 EFS
   /dev/block/mmcblk0p2     1280 Boot 1
   /dev/block/mmcblk0p3     1280 Boot 2
   /dev/block/mmcblk0p4     8192 Param
   /dev/block/mmcblk0p5     8192 Kernel
   /dev/block/mmcblk0p6     8192 Recovery
   /dev/block/mmcblk0p7   307200 ->/cache
   /dev/block/mmcblk0p8    16384 Modem
   /dev/block/mmcblk0p9   524288 ->/system
  /dev/block/mmcblk0p10  2097152 ->/data
  /dev/block/mmcblk0p11 12066816 ->/data/sdext2 - reformated as EXT4.
  /dev/block/mmcblk0p12   319488 ->/preload
  root@android:/ #

• I have a bootup script in /data/local/init.d that scans /data/sdext2/data for directories to bind to matching directories in
  ‘/data/data’.
• My ‘/system/bin/debuggerd’.

  root@android:/ # cat /system/bin/debuggerd
  #!/system/bin/sh
  #added by link2sd
  LOG=/data/link2sd-debuggerd.log
  echo "$(date) mounting..." > $LOG
  
  mount -t ext4 -o rw,noatime,barrier=0,nobh,errors=continue /dev/block/mmcblk0p11 /data/sdext2 1>>$LOG 2>>$LOG
  
  echo "" >> $LOG
  echo "init.d" >> $LOG
  
  /system/xbin/busybox run-parts /data/local/init.d 1>>$LOG 2>>$LOG
  
  echo "" >> $LOG
  
  mount >> $LOG
  echo "$(date) mount finished" >> $LOG
  echo debuggerd.bin launched >> $LOG
  exec /system/bin/debuggerd.bin
  root@android:/ #

• My ‘/system/etc/vold.fstab’.

  root@android:/ # cat /system/etc/vold.fstab
  ## Vold 2.0 Generic fstab
  ## - San Mehat (san@android.com)
  ##
  
  #######################
  ## Regular device mount
  ##
  ## Format: dev_mount  <mount_point><sysfs_path1...>
  ## label        - Label for the volume
  ## mount_point  - Where the volume will be mounted
  ## part         - Partition # (1 based), or 'auto' for first usable partition.
  ## <sysfs_path> - List of sysfs paths to source devices
  ## storage_struct - ex) series, "/mnt/sdcard/extStorages" / parallel
  ######################
  # internal sdcard
  {
          ums_sys_path = /sys/class/android_usb/f_mass_storage/lun0/file
          secure_format = enable
          discard = enable
  }
  #dev_mount sdcard /storage/sdcard0 11 /devices/platform/dw_mmc/mmc_host/mmc0/mmc0 encryptable_nonremovable
  dev_mount sdcard /storage/sdcard0 1 /devices/virtual/block/cyasblkdevblk0
  
  # external sdcard
  {
          ums_sys_path = /sys/class/android_usb/f_mass_storage/lun1/file
          android_secure_containers = enable
  }
  dev_mount sdcard1 /storage/extSdCard 2 /devices/virtual/block/cyasblkdevblk0
  
  
  #usb host device
  {
          media_type = usb
  }
  dev_mount sda /storage/UsbDriveA auto /devices/platform/s3c_otghcd/usb
  
  #usb host device
  {
          media_type = usb
  }
  dev_mount sdb /storage/UsbDriveB auto /devices/platform/s3c_otghcd/usb
  
  #usb host device
  {
          media_type = usb
  }
  dev_mount sdc /storage/UsbDriveC auto /devices/platform/s3c_otghcd/usb
  
  #usb host device
  {
          media_type = usb
  }
  dev_mount sdd /storage/UsbDriveD auto /devices/platform/s3c_otghcd/usb
  
  #usb host device
  {
          media_type = usb
  }
  dev_mount sde /storage/UsbDriveE auto /devices/platform/s3c_otghcd/usb
  
  #usb host device
  {
          media_type = usb
  }
  dev_mount sdf /storage/UsbDriveF auto /devices/platform/s3c_otghcd/usb
  #EOF
  root@android:/ #
  

• My binding script.

  root@android:/ # cat /data/local/init.d/12symlink
  #!/system/bin/sh
  LOG=/data/symlink.log;
  echo "Symlink" > $LOG
  
  busybox mount -o rw,remount /system
  
  cd /data/sdext2/data/
  
  for APP in *; do
          mount -o bind "/data/sdext2/data/$APP" "/data/data/$APP" 1>>$LOG 2>>$LOG;
  done
  
  busybox mount -o ro,remount /system
  root@android:/ #