How to mount the android img file under linux

Question

Recently  I m interest in the android rom  I want to change and rebuild them  So  I did some test on my XOOM  it s very easy to flash something into the machine  I got some ROM from MOTOROLA  http   developer motorola com products software    they are some img file  and I want to know what s inside  I hope to unpack them   I tried the unyaffs  it said broken img file  I try to mount them  it works great on the system img  and I can get the file inside   When I want to mount userdata img by mount -o loop userdata img  mnt userdata  the same as system img   it tells me mount  you must specify the filesystem type so I try the mount -t ext2 -o loop userdata img  mnt userdata  it said mount  wrong fs type  bad option  bad superblock on     So  how to get the file from the inside of userdata img

User · Answer

In Android file system   system img  and  userdata img  are VMS Alpha executable   system img  and  userdata img  have the contents of  system and  data directory on root file system  They are mapped on NAND devices with yaffs2 file system  Now  yaffs2 image file can not be mounted on linux PC  If you can  maybe you got some rom that not packed in yaffs2 file system  You can check those rom file by execute the command   file  lt system img userdata img gt    If it show  VMS Alpha executable  then you can use  unyaffs  to extract it

User · Answer

Another option would be to use the File Explorer in DDMS  Eclipse SDK   you can see the whole file system there and download upload files to the desired place  That way you don t have to mount and deal with images  Just remember to set your device as USB debuggable  from Developer Tools

User · Answer

See the answer at  http   omappedia org wiki Android eMMC Booting Modifying  IMG Files  First you need to  uncompress  userdata img with simg2img  then you can mount it via the loop device

User · Answer

I have found a simple solution  http   andwise net  p 403  Quote   with slight adjustments for better readability        This is for all who want to unpack and modify the original system img that you can flash using recovery    system img  which you get from the google factory images for example  represents a sparse ext4 loop mounted file system    It is mounted into  system of your device  Note that this tutorial is for ext4 file system  You may have system image which is yaffs2  for example       The way it is mounted on Galaxy Nexus     dev block platform omap omap hsmmc 0 by-name system  system ext4 ro relatime barrier 1 data ordered 0 0      Prerequisites          Linux box or virtual machine   simg2img and make ext4fs binaries  which can be downloaded from the linux package android-tools-fsutils         Procedure       Place your system img and the 2 binaries in one directory  and make sure the binaries have exec permission       Part 1     mount the file-system   mkdir sys   simg2img system img sys raw sudo mount -t ext4 -o loop sys raw sys       Then you have your system partition mounted in    sys     and you can modify whatever you want in    sys      For example de-odex apks and framework jars       Part 2     create a new flashable system image   sudo   make ext4fs -s -l 512M -a system new img sys  sudo umount sys rm -fr sys      Now you can simply type    fastboot flash system new img

User · Answer

I have found that Furius ISO mount works best for me  I am using a Debian based distro Knoppix  I use this to Open system img files all the time   Furius ISO mount  https   packages debian org sid otherosfs furiusisomount   When I want to mount userdata img by mount -o loop userdata img  mnt userdata  the same as system img   it tells me mount  you must specify the filesystem type so I try the mount -t ext2 -o loop userdata img  mnt userdata  it said mount  wrong fs type  bad option  bad superblock on     So  how to get the file from the inside of userdata img   To load  img files you have to select loop and load the  img Select loop  Next you select mount Select mount  Furius ISO mount handles all the other options loading the  img file to your  home dir

[android] How to mount the android img file under linux?

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