HowTo: use Link2sd with Cyanogenmod 7.0.3

Android, How to, Nexus One, , , , , ,

Here’s how I got Link2sd working on Nexus One with Cyanogenmod 7.0.3.

Preamble

I tried everything I found on the web (see here for example), but I had no success.

First of all here are the device details I got from “CurveFish DeviceInfo” app:

[System]
Model: Nexus One
Manufacturer: HTC
Device: passion
Product: passion
Brand: google
Bootloader ver.: 0.35.0017
CPI ABI: armeabi-v7a
CPI ABI 2: armeabi
Hardware: mahimahi
Radio: unknown
Kernel Version: 2.6.37.4-cyanogenmod-01332-g7f230e8
shade@toxygene )
#1 PREEMPT Tue Apr 12 12:54:14 EDT 2011
Build Number: GRI40
Release: 2.3.3
SDK: 10

Prerequisites

  • a PC (mine is powered by Ubuntu 11.04 Natty Narwhal)
  • an usb cable for your mobile
  • adb configured and running on the PC (find more info here)
  • a Nexus One set up with Cyanogenmod 7.0.3 ROM
  • Link2sd app installed from Android Market

The problem

If you try to run Link2sd, you’ll receive these outputs:

 

 

 

 

 

 

The exact message is

mount: mounting /dev/block/vold/179:2 on /data/sdext2/ failed: Device or resource busy

Step by step guide

From your pc, connect the phone via adb (I prefer use bash for easy navigation through terminal).
You have to go to the init scripts path and umount /sd-ext/:
$ adb shell
# bash
localhost / # cd /system/etc/init.d
localhost init.d # ls -lAtr
-rwxr-x--- 1 root shell 925 Aug 1 2008 20userinit
-rwxr-x--- 1 root shell 272 Aug 1 2008 06mountdl
-rwxr-x--- 1 root shell 1452 Aug 1 2008 05mountsd
-rwxr-x--- 1 root shell 201 Aug 1 2008 04modules
-rwxr-x--- 1 root shell 229 Aug 1 2008 03firstboot
-rwxr-x--- 1 root shell 27 Aug 1 2008 01sysctl
-rwxr-x--- 1 root shell 365 Aug 1 2008 00banner
localhost init.d # umount /sd-ext/
localhost init.d #

Now run Link2sd from your phone and repeat the procedure:

 

 

 

 

 

 

Exit app, but don’t restart.
It’s time to restore /sd-ext/ on the phone (via adb) and check if we have the new init script from the app:
localhost init.d # mount /dev/block/mmcblk0p2 /sd-ext/
localhost init.d # cd /system/etc/init.d
localhost init.d # ls -lAtr
-rwxr-x--- 1 root shell 925 Aug 1 2008 20userinit
-rwxr-x--- 1 root shell 272 Aug 1 2008 06mountdl
-rwxr-x--- 1 root shell 1452 Aug 1 2008 05mountsd
-rwxr-x--- 1 root shell 201 Aug 1 2008 04modules
-rwxr-x--- 1 root shell 229 Aug 1 2008 03firstboot
-rwxr-x--- 1 root shell 27 Aug 1 2008 01sysctl
-rwxr-x--- 1 root shell 365 Aug 1 2008 00banner
-rwxr-x--- 1 root root 154 Aug 11 16:26 11link2sd
localhost init.d # cat 11link2sd
#!/system/bin/sh
#added by link2sd
sleep 2
mount -t ext2 -o rw /dev/block/vold/179:2 /data/sdext2
mount -t ext2 -o rw /dev/block/mmcblk0p2 /data/sdext2
localhost init.d #
The script has to be modified as here:
#!/system/bin/sh
#added by link2sd
sleep 2
#mount -t ext2 -o rw /dev/block/vold/179:2 /data/sdext2
#mount -t ext2 -o rw /dev/block/mmcblk0p2 /data/sdext2
#
mount -t ext2 -o bind /sd-ext/ /data/sdext2/
Pay attention to the highlighted parts!

For this purpose you can use vi, but first grant read/write permissions to the filesystem:
localhost init.d # mount -o rw,remount /system/
localhost init.d # vi 11link2sd

Verify your work and restore filesystem permissions:
localhost init.d # cat 11link2sd
#!/system/bin/sh
#added by link2sd
sleep 2
#mount -t ext2 -o rw /dev/block/vold/179:2 /data/sdext2
#mount -t ext2 -o rw /dev/block/mmcblk0p2 /data/sdext2
#
mount -t ext2 -o bind /sd-ext/ /data/sdext2/
localhost init.d # mount -o ro,remount /system/
localhost init.d #

Run the script:
localhost init.d # ./11link2sd
localhost init.d #

Verify Link2sd

Choose an application with a widget (in standard Android system, apps with widget cannot be moved to SD).

For this test I used Evernote.
In Link2sd I clicked the “Create link” button.

 

 

 

 

 

 

Now try to use the widget

 

 

 

 

 

 

Done

 

HowTo: root your Xperia x10 mini pro 2.1.1.A.0.6 – 2.1-update1

Android, Featured, How to, Xperia X10 Mini Pro, , , , , , ,

In this post I’m going to show you how I manually achieved root on this device.

Preamble

I tried every possible automated tool I found (z4root, SuperOneClick), but I had no luck.
My setup involves a GNU/Linux box and this may be the cause.
First of all here are the device details I got from “CurveFish DeviceInfo” app:
Model: U20i
Manufacturer: Sony Ericsson
Device: U20i
Product: U20i_1238-0129
Brand: SEMC
CPI ABI: armeabi
Kernel Version: 2.6.29
SEMCUser@SEMCHost )
#1 PREEMPT Fri Dec 17 18:35:45 2010
Build Number: 2.1.1.A.0.6
Release: 2.1-update1
SDK: 7
Full log here Xperia X10 Mini Pro.deviceinfo.txt.

Prerequisites

Here’s the required tools:

  • a PC (mine is powered by Ubuntu 11.04 Natty Narwhal)
  • an usb cable for your mobile
  • adb configured and  running on the PC (find more info here)

Software used:

Once you have all the necessary stuff, we can start!

Step by step guide

  1. Start putting device in “debug mode”: Settings – Applications – Development – USB debugging
  2. Connect device to pc using usb cable and start adb with
    adb shell
    You may to choose “Charge phone”, so you can still access your sdcard within the phone.
  3. Check you can write in this specific directory:
    $ cd /sqlite_stmt_journals
    $ touch testfile
    $ ls -l
    -rw-rw-rw- shell    shell           0 2011-08-02 16:23 testfile
    $ rm testfile
    $ ls -l
    $ exit
  4. If everything went ok, put the needed files in the previous directory; from your pc terminal type:
    $ adb push psneuter /sqlite_stmt_journals
    3157 KB/s (585731 bytes in 0.181s)
    $ adb push su-v2 /sqlite_stmt_journals/su
    630 KB/s (26264 bytes in 0.040s)
    $ adb push Superuser_2.3.6.1.apk /sqlite_stmt_journals
    3533 KB/s (196521 bytes in 0.054s)
  5. Prepare the software on the phone:
    $ adb shell
    $ cd /sqlite_stmt_journals
    $ ls -l
    -rw-rw-rw- shell    shell      196521 2011-08-03 13:16 Superuser_2.3.6.1.apk
    -rw-rw-rw- shell    shell       26264 2011-08-03 13:16 su
    -rw-rw-rw- shell    shell      585731 2011-08-03 13:15 psneuter
    $ chmod 755 psneuter
  6. Now you can exec psneuter. You will lose the active shell.
    You could see this message or not, that’s not a problem:$ ./psneuter
    property service neutered.
    killing adbd. (should restart in a second or two)
    Your phone will detach and reattach usb connection automatically.
  7. Once more you have to connect to the device with adb shell, but you’ll see a different prompt:$ adb shell
    # id
    uid=0(root) gid=0(root)
  8. Now we have a temporary access to root user via adb.
    Let’s do the trick on the system:
    # mount -o remount,rw /dev/block/mtdblock0 /system
    # mkdir /system/xbin
    # chmod 755 /system/xbin
    # cat /sqlite_stmt_journals/su > /system/xbin/su
    # chmod 6755 /system/xbin/su
    # ls -l /system/xbin/su
    -rwsr-sr-x root root 26264 2011-08-02 18:19 su
    # cat /sqlite_stmt_journals/Superuser_2.3.6.1.apk > /system/app/Superuser_2.3.6.1.apk
    # chmod 777 /system/app/Superuser_2.3.6.1.apk
  9. It’s time to reboot:
    # reboot

That’s it.

Verify

One easy way to verify the process is to install “Android Terminal Emulator” from market and type:
$ su
#

if you get the Superuser popup and the right prompt “#” it’s all ok.

Further reading

Why don’t you install ClockworkMod Recovery now?

Maybe Ice Cream Sandwich?

iphone-gcc: compilare C/C++ su iPhone

Programming,

Finalmente torna a funzionare gcc sul mio iPhone, stavolta con firmware 3.0.
Prerequisiti

  • connessione internet da iPhone
  • iPhone jailbroken

Procedura

  1. collegarsi via ssh al telefono
  2. scaricare ed installare fake-libgcc

    root # wget http://files.getdropbox.com/u/876743/fake-libgcc_1.0_iphoneos-arm.deb
    root # dpkg -i fake-libgcc_1.0_iphoneos-arm.deb

 

  • installare com.bigboss.20toolchain e libstdc++

    root # aptitude install com.bigboss.20toolchain libstdc++

 

Esempio: Hello world!
Questa è una verifica del funzionamento:

root # cat main.c
#include “/private/var/include/stdio.h”
int main(int argc, char** argv) {
printf(“Hello World!\n”);
  return 0;
}
root # gcc -Wall -I/private/var/include/ main.c
root # ./a.out
Killed
root # ldid -S a.out
root # ./a.out
Hello World!
root #