get_filesystem_config

#!/bin/bash
#
# Copyright (C) 2016, Miui Patchrom
#

ACTION=$1
LINE_TERMINATION=$'\r\n'
OLD_IFS=$IFS
IFS=$'\n'
BUSYBOX="$2"
if [ -n "$(adb shell id | grep "uid=0")" ];then
    root='true'
elif [ -z "$(adb shell su -c "id" | grep "uid=0")" ];then
    echo "Please root your device, and try again."
    exit 1
fi

if [ -n $root ];then
    fileSystemInfo=$(adb shell ls -aRZ /system)
else
    fileSystemInfo=$(adb shell su -c "ls -aRZ /system")
fi

if [ "$ACTION" = '--info' ];then
    for line in $fileSystemInfo
    do
        if [ $line == $LINE_TERMINATION -o ${line:0:1} == 'd' ];then
            continue
        fi
        # lrwxrwxrwx root root u:object_r:system_file:s0 chmod -> toybox
        # cut line before the string " ->"
        line=${line%% ->*}
        if [ $(echo $line | cut -d ':' -f2) == $LINE_TERMINATION ];then
            dir=$(echo $line | cut -d ':' -f1)
            path=$dir
            if [ -n $root ];then
                line=$(adb shell ls -dZ $path)
            else
                line=$(adb shell su -c "ls -dZ $path")
            fi
        else
            path=$dir/$(echo ${line##*:s0} | tr -d $LINE_TERMINATION | sed 's/^[ ]*//')
        fi
        selabel="u:${line##*u:}"
        selabel=${selabel%% *}
        if [ -n $root ];then
            uid=$(adb shell $BUSYBOX stat -c %u $path | tr -d $LINE_TERMINATION)
            gid=$(adb shell $BUSYBOX stat -c %g $path | tr -d $LINE_TERMINATION)
            perm=$(adb shell $BUSYBOX stat -c %a $path | tr -d $LINE_TERMINATION)
        else
            uid=$(adb shell su -c "$BUSYBOX stat -c %u $path" | tr -d $LINE_TERMINATION)
            gid=$(adb shell su -c "$BUSYBOX stat -c %g $path" | tr -d $LINE_TERMINATION)
            perm=$(adb shell su -c "$BUSYBOX stat -c %a $path" | tr -d $LINE_TERMINATION)
        fi
        #Remove blank in filename, it cause ota_from_target_files failed.
        path=$(echo $path | sed 's/ //g')
        echo "${path#\/} $uid $gid $perm selabel=$selabel capabilities=0x0"
    done
elif [ "$ACTION" = '--link' ];then
    for line in $fileSystemInfo
    do
        if [ $line == $LINE_TERMINATION];then
            continue
        fi
        line=${line%% ->*}
        if [ $(echo $line | cut -d ':' -f2) == $LINE_TERMINATION ];then
            dir=$(echo $line | cut -d ':' -f1)
            path=$dir
            if [ -n $root ];then
                line=$(adb shell ls -dZ $path)
            else
                line=$(adb shell su -c "ls -dZ $path")
            fi
        fi
        
        if [ ${line:0:1} == 'l' ];then
            path=$dir/$(echo ${line##*:s0} | tr -d $LINE_TERMINATION | sed 's/^[ ]*//')
            if [ -n $root ];then
                link=$(adb shell $BUSYBOX readlink $path | tr -d $LINE_TERMINATION)
            else
                link=$(adb shell su -c "$BUSYBOX readlink $path" | tr -d $LINE_TERMINATION)
            fi
            echo "${path#\/}|$link"
        fi
    done
fi