I was trying to take screenshot of the Android screen programatically. I had done the following code:
private void getsnap(){
try{
Process sh = R
EPIPE issue usually happens when you either try to execute command which needs root permissions (getRuntime().exec) in your case on the device without it or run several root commands simultaneously. If you work on the emulator and need to root it I think you you can try this while the emulator is running:
adb shell mount -o rw,remount -t yaffs2 /dev/block/mtdblock03 /system
adb push su /system/xbin/su
adb shell chmod 06755 /system
adb shell chmod 06755 /system/xbin/su
Here http://abd-tech.blogspot.com/2011/05/test-root-apps-on-android-emulator.html more detail explanation.