Stupid question - Android Software/Hacking General [Developers Only]

When I run under a terminal emulator, are the programs that are being run, i.e. busybox, run in the dalvik vm or are they run as elf binaries on the actual arm processor(s)?

If you use programs like su or busybox you run the native elf file. Of course you can run programs on the dalvikvm from terminal, but most of them do the same as you would start it from your launcher
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Related

GUI Shortcut to Execute Linux Shell Script

To run a shell script quickly, I open Terminal Emulator and paste command from Clipper+ archives. Is there a faster way?
I want to tap a shortcut on homescreen to execute the shell script. Is it possible without diving into app development? Any hack etc?
Script manager in combination with the sm widget. I used to use it to run reboot scripts while on ICS.
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What if I want to have a shortcut to a script to be executed with Terminal Emulator? Not in/with any other program...
This seems to be not possible.

Android Command Line Tools

Hi all, here is a package of command line tools I've put together, here's the readme with a few of the tools listed.
Android Command Line Tools
This Is Working Prefectly On Samsung Galaxy S3 'GT-I9305'
Your Phone Should Be Rooted To Perform These Steps!!!
Installation:
1. Copy The android-tools.zip To Your SD Card (Internal Or External) And Extract It
You Should Now Have A Directory Called 'android-tools'.
2. Open A Terminal On Your Phone And Type The Following
su
mkdir /data/tmp
cat /sdcard/android-tools/busybox > /data/tmp/busybox
cat /sdcard/android-tools/busybox-installer > /data/tmp/busybox-installer
cat /sdcard/android-tools/pkgs.tar > /data/tmp/pkgs.tar
cat /sdcard/android-tools/install.sh > /data/tmp/install.sh
cd /data/tmp
chmod 755 *
./install.sh
3. In Android Terminal Emulator Preferences, Set The Shell Path to '/system/bin/bash'
And Leave The Initial Command Blank.
4. Quit Terminal Emulator And Restart.
OpenSSH: ssh-keygen Save To '/data/local/home/root/.ssh/id_rsa'.
'ssh' And 'scp' Binaries Will Look For Keys In '/data/local/home/root/.ssh/'
So You Dont Need The '-i' Option, 'ssh-copy-id' Gets It From There Too.
Arduino:
There Is A Build Environment To Build And Upload Arduino Sketches With A Script Called 'arduino' To Wrap It Up
Type 'arduino --help' In Terminal To See Its Options, It Uses The Arduino-1.0 Core Library And I have Tested
Every Board And Can Confirm It Builds For All Boards Including 'micro' And 'leonardo'. It Uses 'avrdude'
'avr-libc-1.6.7' 'gcc-avr-4.5.1', I Wrote A 'arduino.nanorc' File For Writing Sketches Which Has All The
Functions And Constants Of The Arduino Core Library With The Same Colours As In The IDE.
Other Tools:
Some Other Binaries I Have Added Or Modified Are 'tar' With All Options Enabled, 'iwconfig', 'grep egrep fgrep'
With Colour And PCRE Enabled, '7zip', 'ipctool', 'shc' For Compiling Shell Scripts, 'ssh-copy-id', 'sed' With All Options
Enabled, 'macchanger', 'bootimg_baseaddr' In bash/sh, Compiled GNU 'core-utils', 'ncurses-hexedit', 'nmap', 'ngrep', 'nano'
'strace', 'gcc', 'g++', 'unpack-bootimg' In bash, 'unrar' And 'vim'.
Backtrack 5 ARM Is Configured And Ready To Go, Just 'mkdir /sdcard/Chroot'
And Copy Your bt5.img File Into It And Type 'bootbt', Then Edit The Scripts
For VNC Server 'startvnc' And 'stopvnc' To Reflect Your Screen Size, These
Are In The pkgs.tar
Replacing '/system/etc/mkshrc' With The One Included In This Package Enables Bash As Default In ADB Shell
If The Bash Binary Is Found In '/system/bin/bash' Else The Default Shell Will Drop Back To mksh.
Nano Does Not Save Through ADB Shell Using ^O Or '^X Then y' Method, Works Fine In Terminal Emulator App On Device.
There are more tools than listed above, here's the link> https://www.dropbox.com/s/yjumfljy7e1yoyc/android-tools.zip
If you're on an custom ROM and can't use the terminal emulator when you restart terminal emulator, get /system/lib/libncurses.so from stock ROM and use adb to copy it into /system/lib on your current ROM, I will fix this tomorrow.
Sent from my GT-I9305 using xda app-developers app
Please post the right link... this one is malformed.
sciurius said:
Please post the right link... this one is malformed.
Click to expand...
Click to collapse
op just updated the link, package is now ready for download again!
thank you, andreotti09!!!
greetz,
sUsH

Need Android Terminal Command Reference

Does anyone have a list or link to the android terminal command set? I found a few for Unix/Linux but some commands don't work and others I know work on Android aren't even listed. Who has a complete list of terminal commands for say the market app "Android Terminal Emmulator"
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elfaure said:
Does anyone have a list or link to the android terminal command set? I found a few for Unix/Linux but some commands don't work and others I know work on Android aren't even listed. Who has a complete list of terminal commands for say the market app "Android Terminal Emmulator"
Click to expand...
Click to collapse
The terminal emulator only emulates a terminal. The commands available depend on the programs installed on your device.
You can use the busybox documentation as a guide for the common Unix commands implemented in busybox:
http://www.busybox.net/downloads/BusyBox.html
For some commands which have a more limited implementation in Android (look into /bin), e.g. chmod, run "busybox chmod" instead of "chmod" to get the more capable version.
But you can also install more programs, or advanced versions of the commands busybox provides.
_that
Thks. With as many emails as you entertain daily, I really appreciate you taking the time to always give a detailed and educating explanation with great links.
I like Jack's explanation on wiki for his market app "Android Terminal Emulator". He says you can:
echo $PATH
then
ls -al /PATH for each PATH in $PATH to list all the commands available on your device

Need to Single-Click a sh script

I've got a sh script that when I run it kills the mediaserver process and saves lots of battery. But right now to run it I have to start Sh Script Runner, load the script, execute it, exit script runner
Can someone please show me a way to single-click from my desktop to run this script? I'm running CM7.
Thanks!

[GUIDE/DEV] Microsoft Android "Emulator"

I can't find much of any information on hacking the microsoft android emulator. Ideally, I'd like to get it working with superuser, exposed, etc, so it can be a fully functional way to see how android itself and apps work in different environments, all from my desktop. Also, I can just play around with stuff that I wouldn't touch on my tablet for fear of bricking it. I like playing with things.
Disclaimer: I'm not interested in maintaining anything, but as mentioned above, I can't find any information. Therefore, I'm simply posting what information I have here, in the hopes it will interest someone else enough to take a harder look at it. My original post was over here, but I've expanded beyond simply adding supersu to the image.
Things I can't do:
- Install superuser
- Install Xposed
- Install Google Play for anything more recent than KitKat
- Install recovery scripts
Things I can do:
- Run commands as root.
- Install Google Play Services on KitKat
- Change the screen resolution
- Change the amount of internal disk space
- Change the amount of memory and cpu cores available.
- Install busybox
- Flash simple scripts that don't require recent versions of cwm/twrp/other modern recovery.
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Background information: The Microsoft Android "Emulator" is actually a HyperV virtual machine. When you install it, it enables the HyperV virtualization service in windows*. The effect of this is that instead of running android by emulating an arm processor, it runs android natively, with far better performance, by using Microsoft's hypervisor that's built into windows (win8+). You can work with it with Visual Studio and with Android Studio, but I don't use either much, so I can't help you with that. You can download it from Visual Studio if you want to (VS 2015 is free), or you can download a standalone version. I don't know if there's a difference between the two.
* I'm not sure if it installs the HyperV GUI as well, as I already use HyperV for other things and had it already installed. If you need to do so, you can install the GUI by going to add-remove windows features in the control panel ('appwiz.cpl' from the control panel).
----------------------------------------
Modifying the properties of the emulated system.
Configuration file location: After you create a device, the .cfg file for it will be located in %localappdata%\Microsoft\VisualStudioEmulator\Android\Containers\Local\Devices
To change the resolution: So far, I haven't identified any supported resolutions other than those listed in the device profiles list. So far, supported resolutions that I've used successfully are 480x800, 720x1080. You can edit the .cfg file for the specific device that you want to change the resolution of, and change the `device.screen.resolution=` line to any supported (see previous) resolution.
To change the size of the internal storage, follow the instructions here. You'll need an ubuntu cd; minimal install cd is fine if you have slow internet/computer or low ram.
To change the amount of ram or processors allocated to the virtual machine: Open Hyper-V manager, right-click the appropriate VM and click settings.
- Change the ram allocation by clicking Memory in the list at left. I do not know what happens if you try using Dynamic Memory; if it works, it should be more memory-efficient, but I left that alone. Now update the `device.vm.ram.size=` line in the .cfg file.
- Change the cpu allocation by clicking the Processor field. Please note that if you have hyper-threading, you should only use half your logical processors as cpus; the hyperthreaded 'cores' won't work as well (according to information online; you can check number of logical processors in windows task manager's performance tab). Now update the 'device.vm.cpu.count=' line in the .cfg file
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Info on "recovery" and "flashing" - Installing google play
So far, I have only managed to get Google Play Services working on KitKat. I can't get it to work on Lollipop or Marshmallow (and haven't tried earlier versions at all); the virtual machine does *not* have a recovery or fastboot because of the way it works, and I haven't figured out any way of installing such. Instead, there's a simple shell file called install_zip.sh. It does not work with modern flashable zips that require TWRP/CWM; it only works with the old style zip designed for a specific architecture. As such, opengapps flashable zips will not work.
To install Google Play Services on KitKat (4.4.4)
1. Inside the emulator, open the browser and go to http://www.teamandroid.com/gapps/ and download the file linked under Gapps CyanogenMod 11.
2. Open the window the the android VM from the Hyper-V Manager to get console access. If you have ADB installed locally, you can use that in the future, but getting the VM's shared IP requires terminal access anyways (run `ip addr` as root inside the emulator to get the list of IPs).
3. Run `adb shell` to get access to the root shell (yes, it's that easy).
4. Run `install_zip.sh /sdcard/Downloads/gapps-kk-20140105-signed.zip` (or whatever the name/path for the downloaded gapps file is).
5. It should complete successfully. Now type exit to exit the adb shell, and close the hyper-v console window (the android emulator will continue running).
6. Click the 'X' at the top right of the Emulator to shut down/close the VM
7. Start the emulator back up. You should now have access to Google Play Services.
----------------------------------------
Busybox
The emulator does not come with a preinstalled copy of busybox. It does come with the android toolbox, but this has only a very minimal amount of commands in it. The instructions below are for installing stericson's busybox.
1. Get a copy of stericson's busybox from somewhere--your personal device, etc, it doesn't matter. The easiest way is to either install it on a real android device and grab it with airdroid (or other), or to use a play store scanner to get it. The file name will probably be something like stericson.busybox.apk.
2. Rename it to .zip so you can access the contents.
3. Extract the busybox-x86.png file from the 'assets' folder inside the zip, and rename it to `busybox`.
4. In the Android Emulator, click the >> button for tools, and click the sdcard header. Choose a folder (a new one on your dekstop will do) and tell it to pull the contents of the sdcard to the folder.
5. Move the busybox file into the Download folder that you just pulled from the sdcard. If you created a folder for this, you can delete it now.
6. Back in the android emulator, push the folder structure back into the sdcard; this will move the busybox onto the emulator.
7. Open the HyperV console for the emulator or open a terminal app in the android emulator (installing it is up to you)
8. Run `adb shell` to get a root prompt.
9. Run `mount -o rw,remount /system` to remount the system partition as writable
10. Run `cp /sdcard/Download/busybox /system/xbin` to copy the busybox binary over
11. Run `chmod 777 /system/xbin/busybox` to make the busybox binary executable.
12. Run `busybox --install /system/xbin` to copy the busybox binary for all the included applets. I think the -s paramter will symlink the applets to the main binary instead, but I'm not sure.
13. Type exit in the adb shell.
14. You can now run busybox commands in the terminal, and use apps that require busybox to be installed.
Now that you have busybox installed, you can use unzip, etc.
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Hacking the OS itself.
The android emulator uses a VHD file for the disks. I've mounted the vhd file inside an ubuntu server to play with, and discovered several things about the way it works. The first partition is the boot partition, it contains 3 files:
- kernel - the android/linux kernel
- ramdisk - the ramdisk for the root filesystem. gzipped cpio archive.
- cmdline - the kernel parameters(? not sure what to call this)
I've tried modifying the ramdisk to add the init files for the superuser, but this doesn't seem to work properly; when I boot up the vhd file, I can open the console with hyper-v manager (the android emulator machines show up there automatically), and when it gets to the ramdisk, it says so--then the caps/num/scroll lights start flashing and it hangs. I haven't gotten any further than that at this time.

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