surya: Add Optimus scripts & defconfigHEADs12.1

1 files changed, 825 insertions, 0 deletions

diff --git a/AnyKernel3/tools/ak3-core.sh b/AnyKernel3/tools/ak3-core.sh
new file mode 100755
index 000000000000..5e592ca062c8
--- /dev/null
+++ b/AnyKernel3/tools/ak3-core.sh
@@ -0,0 +1,825 @@
+### AnyKernel methods (DO NOT CHANGE)
+## osm0sis @ xda-developers
+
+OUTFD=$1;
+
+# set up working directory variables
+[ "$home" ] || home=$PWD;
+bootimg=$home/boot.img;
+bin=$home/tools;
+patch=$home/patch;
+ramdisk=$home/ramdisk;
+split_img=$home/split_img;
+
+### output/testing functions:
+# ui_print "<text>" [...]
+ui_print() {
+  until [ ! "$1" ]; do
+    echo "ui_print $1
+      ui_print" >> /proc/self/fd/$OUTFD;
+    shift;
+  done;
+}
+
+# abort ["<text>" [...]]
+abort() {
+  ui_print " " "$@";
+  exit 1;
+}
+
+# contains <string> <substring>
+contains() {
+  [ "${1#*$2}" != "$1" ];
+}
+
+# file_getprop <file> <property>
+file_getprop() {
+  grep "^$2=" "$1" | tail -n1 | cut -d= -f2-;
+}
+###
+
+### file/directory attributes functions:
+# set_perm <owner> <group> <mode> <file> [<file2> ...]
+set_perm() {
+  local uid gid mod;
+  uid=$1; gid=$2; mod=$3;
+  shift 3;
+  chown $uid:$gid "$@" || chown $uid.$gid "$@";
+  chmod $mod "$@";
+}
+
+# set_perm_recursive <owner> <group> <dir_mode> <file_mode> <dir> [<dir2> ...]
+set_perm_recursive() {
+  local uid gid dmod fmod;
+  uid=$1; gid=$2; dmod=$3; fmod=$4;
+  shift 4;
+  while [ "$1" ]; do
+    chown -R $uid:$gid "$1" || chown -R $uid.$gid "$1";
+    find "$1" -type d -exec chmod $dmod {} +;
+    find "$1" -type f -exec chmod $fmod {} +;
+    shift;
+  done;
+}
+###
+
+### dump_boot functions:
+# split_boot (dump and split image only)
+split_boot() {
+  local dumpfail;
+
+  if [ ! -e "$(echo $block | cut -d\  -f1)" ]; then
+    abort "Invalid partition. Aborting...";
+  fi;
+  if [ "$(echo $block | grep ' ')" ]; then
+    block=$(echo $block | cut -d\  -f1);
+    customdd=$(echo $block | cut -d\  -f2-);
+  elif [ ! "$customdd" ]; then
+    local customdd="bs=1048576";
+  fi;
+  if [ -f "$bin/nanddump" ]; then
+    $bin/nanddump -f $bootimg $block;
+  else
+    dd if=$block of=$bootimg $customdd;
+  fi;
+  [ $? != 0 ] && dumpfail=1;
+
+  mkdir -p $split_img;
+  cd $split_img;
+  if [ -f "$bin/unpackelf" ] && $bin/unpackelf -i $bootimg -h -q 2>/dev/null; then
+    if [ -f "$bin/elftool" ]; then
+      mkdir elftool_out;
+      $bin/elftool unpack -i $bootimg -o elftool_out;
+    fi;
+    $bin/unpackelf -i $bootimg;
+    [ $? != 0 ] && dumpfail=1;
+    mv -f boot.img-kernel kernel.gz;
+    mv -f boot.img-ramdisk ramdisk.cpio.gz;
+    mv -f boot.img-cmdline cmdline.txt 2>/dev/null;
+    if [ -f boot.img-dt -a ! -f "$bin/elftool" ]; then
+      case $(od -ta -An -N4 boot.img-dt | sed -e 's/ del//' -e 's/   //g') in
+        QCDT|ELF) mv -f boot.img-dt dt;;
+        *)
+          gzip -c kernel.gz > kernel.gz-dtb;
+          cat boot.img-dt >> kernel.gz-dtb;
+          rm -f boot.img-dt kernel.gz;
+        ;;
+      esac;
+    fi;
+  elif [ -f "$bin/mboot" ]; then
+    $bin/mboot -u -f $bootimg;
+  elif [ -f "$bin/dumpimage" ]; then
+    dd bs=$(($(printf '%d\n' 0x$(hexdump -n 4 -s 12 -e '16/1 "%02x""\n"' $bootimg)) + 64)) count=1 conv=notrunc if=$bootimg of=boot-trimmed.img;
+    $bin/dumpimage -l boot-trimmed.img > header;
+    grep "Name:" header | cut -c15- > boot.img-name;
+    grep "Type:" header | cut -c15- | cut -d\  -f1 > boot.img-arch;
+    grep "Type:" header | cut -c15- | cut -d\  -f2 > boot.img-os;
+    grep "Type:" header | cut -c15- | cut -d\  -f3 | cut -d- -f1 > boot.img-type;
+    grep "Type:" header | cut -d\( -f2 | cut -d\) -f1 | cut -d\  -f1 | cut -d- -f1 > boot.img-comp;
+    grep "Address:" header | cut -c15- > boot.img-addr;
+    grep "Point:" header | cut -c15- > boot.img-ep;
+    $bin/dumpimage -p 0 -o kernel.gz boot-trimmed.img;
+    [ $? != 0 ] && dumpfail=1;
+    case $(cat boot.img-type) in
+      Multi) $bin/dumpimage -p 1 -o ramdisk.cpio.gz boot-trimmed.img;;
+      RAMDisk) mv -f kernel.gz ramdisk.cpio.gz;;
+    esac;
+  elif [ -f "$bin/rkcrc" ]; then
+    dd bs=4096 skip=8 iflag=skip_bytes conv=notrunc if=$bootimg of=ramdisk.cpio.gz;
+  else
+    $bin/magiskboot unpack -h $bootimg;
+    case $? in
+      1) dumpfail=1;;
+      2) touch chromeos;;
+    esac;
+  fi;
+
+  if [ $? != 0 -o "$dumpfail" ]; then
+    abort "Dumping/splitting image failed. Aborting...";
+  fi;
+  cd $home;
+}
+
+# unpack_ramdisk (extract ramdisk only)
+unpack_ramdisk() {
+  local comp;
+
+  cd $split_img;
+  if [ -f ramdisk.cpio.gz ]; then
+    if [ -f "$bin/mkmtkhdr" ]; then
+      mv -f ramdisk.cpio.gz ramdisk.cpio.gz-mtk;
+      dd bs=512 skip=1 conv=notrunc if=ramdisk.cpio.gz-mtk of=ramdisk.cpio.gz;
+    fi;
+    mv -f ramdisk.cpio.gz ramdisk.cpio;
+  fi;
+
+  if [ -f ramdisk.cpio ]; then
+    comp=$($bin/magiskboot decompress ramdisk.cpio 2>&1 | grep -v 'raw' | sed -n 's;.*\[\(.*\)\];\1;p');
+  else
+    abort "No ramdisk found to unpack. Aborting...";
+  fi;
+  if [ "$comp" ]; then
+    mv -f ramdisk.cpio ramdisk.cpio.$comp;
+    $bin/magiskboot decompress ramdisk.cpio.$comp ramdisk.cpio;
+    if [ $? != 0 ]; then
+      echo "Attempting ramdisk unpack with busybox $comp..." >&2;
+      $comp -dc ramdisk.cpio.$comp > ramdisk.cpio;
+    fi;
+  fi;
+
+  [ -d $ramdisk ] && mv -f $ramdisk $home/rdtmp;
+  mkdir -p $ramdisk;
+  chmod 755 $ramdisk;
+
+  cd $ramdisk;
+  EXTRACT_UNSAFE_SYMLINKS=1 cpio -d -F $split_img/ramdisk.cpio -i;
+  if [ $? != 0 -o ! "$(ls)" ]; then
+    abort "Unpacking ramdisk failed. Aborting...";
+  fi;
+  if [ -d "$home/rdtmp" ]; then
+    cp -af $home/rdtmp/* .;
+  fi;
+}
+### dump_boot (dump and split image, then extract ramdisk)
+dump_boot() {
+  split_boot;
+  unpack_ramdisk;
+}
+###
+
+### write_boot functions:
+# repack_ramdisk (repack ramdisk only)
+repack_ramdisk() {
+  local comp packfail mtktype;
+
+  cd $home;
+  case $ramdisk_compression in
+    auto|"") comp=$(ls $split_img/ramdisk.cpio.* 2>/dev/null | grep -v 'mtk' | rev | cut -d. -f1 | rev);;
+    none|cpio) comp="";;
+    gz) comp=gzip;;
+    lzo) comp=lzop;;
+    bz2) comp=bzip2;;
+    lz4-l) comp=lz4_legacy;;
+    *) comp=$ramdisk_compression;;
+  esac;
+
+  if [ -f "$bin/mkbootfs" ]; then
+    $bin/mkbootfs $ramdisk > ramdisk-new.cpio;
+  else
+    cd $ramdisk;
+    find . | cpio -H newc -o > $home/ramdisk-new.cpio;
+  fi;
+  [ $? != 0 ] && packfail=1;
+
+  cd $home;
+  $bin/magiskboot cpio ramdisk-new.cpio test;
+  magisk_patched=$?;
+  [ $((magisk_patched & 3)) -eq 1 ] && $bin/magiskboot cpio ramdisk-new.cpio "extract .backup/.magisk $split_img/.magisk";
+  if [ "$comp" ]; then
+    $bin/magiskboot compress=$comp ramdisk-new.cpio;
+    if [ $? != 0 ]; then
+      echo "Attempting ramdisk repack with busybox $comp..." >&2;
+      $comp -9c ramdisk-new.cpio > ramdisk-new.cpio.$comp;
+      [ $? != 0 ] && packfail=1;
+      rm -f ramdisk-new.cpio;
+    fi;
+  fi;
+  if [ "$packfail" ]; then
+    abort "Repacking ramdisk failed. Aborting...";
+  fi;
+
+  if [ -f "$bin/mkmtkhdr" -a -f "$split_img/boot.img-base" ]; then
+    mtktype=$(od -ta -An -N8 -j8 $split_img/ramdisk.cpio.gz-mtk | sed -e 's/ nul//g' -e 's/   //g' | tr '[:upper:]' '[:lower:]');
+    case $mtktype in
+      rootfs|recovery) $bin/mkmtkhdr --$mtktype ramdisk-new.cpio*;;
+    esac;
+  fi;
+}
+
+# flash_boot (build, sign and write image only)
+flash_boot() {
+  local varlist i kernel ramdisk fdt cmdline comp part0 part1 nocompflag signfail pk8 cert avbtype;
+
+  cd $split_img;
+  if [ -f "$bin/mkimage" ]; then
+    varlist="name arch os type comp addr ep";
+  elif [ -f "$bin/mkbootimg" -a -f "$bin/unpackelf" -a -f boot.img-base ]; then
+    mv -f cmdline.txt boot.img-cmdline 2>/dev/null;
+    varlist="cmdline base pagesize kernel_offset ramdisk_offset tags_offset";
+  fi;
+  for i in $varlist; do
+    if [ -f boot.img-$i ]; then
+      eval local $i=\"$(cat boot.img-$i)\";
+    fi;
+  done;
+
+  cd $home;
+  for i in zImage zImage-dtb Image Image-dtb Image.gz Image.gz-dtb Image.bz2 Image.bz2-dtb Image.lzo Image.lzo-dtb Image.lzma Image.lzma-dtb Image.xz Image.xz-dtb Image.lz4 Image.lz4-dtb Image.fit; do
+    if [ -f $i ]; then
+      kernel=$home/$i;
+      break;
+    fi;
+  done;
+  if [ "$kernel" ]; then
+    if [ -f "$bin/mkmtkhdr" -a -f "$split_img/boot.img-base" ]; then
+      $bin/mkmtkhdr --kernel $kernel;
+      kernel=$kernel-mtk;
+    fi;
+  elif [ "$(ls $split_img/kernel* 2>/dev/null)" ]; then
+    kernel=$(ls $split_img/kernel* | grep -v 'kernel_dtb' | tail -n1);
+  fi;
+  if [ "$(ls ramdisk-new.cpio* 2>/dev/null)" ]; then
+    ramdisk=$home/$(ls ramdisk-new.cpio* | tail -n1);
+  elif [ -f "$bin/mkmtkhdr" -a -f "$split_img/boot.img-base" ]; then
+    ramdisk=$split_img/ramdisk.cpio.gz-mtk;
+  else
+    ramdisk=$(ls $split_img/ramdisk.cpio* 2>/dev/null | tail -n1);
+  fi;
+  for fdt in dt recovery_dtbo dtb; do
+    for i in $home/$fdt $home/$fdt.img $split_img/$fdt; do
+      if [ -f $i ]; then
+        eval local $fdt=$i;
+        break;
+      fi;
+    done;
+  done;
+
+  cd $split_img;
+  if [ -f "$bin/mkimage" ]; then
+    [ "$comp" == "uncompressed" ] && comp=none;
+    part0=$kernel;
+    case $type in
+      Multi) part1=":$ramdisk";;
+      RAMDisk) part0=$ramdisk;;
+    esac;
+    $bin/mkimage -A $arch -O $os -T $type -C $comp -a $addr -e $ep -n "$name" -d $part0$part1 $home/boot-new.img;
+  elif [ -f "$bin/elftool" ]; then
+    [ "$dt" ] && dt="$dt,rpm";
+    [ -f cmdline.txt ] && cmdline="cmdline.txt@cmdline";
+    $bin/elftool pack -o $home/boot-new.img header=elftool_out/header $kernel $ramdisk,ramdisk $dt $cmdline;
+  elif [ -f "$bin/mboot" ]; then
+    cp -f $kernel kernel;
+    cp -f $ramdisk ramdisk.cpio.gz;
+    $bin/mboot -d $split_img -f $home/boot-new.img;
+  elif [ -f "$bin/rkcrc" ]; then
+    $bin/rkcrc -k $ramdisk $home/boot-new.img;
+  elif [ -f "$bin/mkbootimg" -a -f "$bin/unpackelf" -a -f boot.img-base ]; then
+    [ "$dt" ] && dt="--dt $dt";
+    $bin/mkbootimg --kernel $kernel --ramdisk $ramdisk --cmdline "$cmdline" --base $base --pagesize $pagesize --kernel_offset $kernel_offset --ramdisk_offset $ramdisk_offset --tags_offset "$tags_offset" $dt --output $home/boot-new.img;
+  else
+    [ "$kernel" ] && cp -f $kernel kernel;
+    [ "$ramdisk" ] && cp -f $ramdisk ramdisk.cpio;
+    [ "$dt" -a -f extra ] && cp -f $dt extra;
+    for i in dtb recovery_dtbo; do
+      [ "$(eval echo \$$i)" -a -f $i ] && cp -f $(eval echo \$$i) $i;
+    done;
+    case $kernel in
+      *Image*)
+        if [ ! "$magisk_patched" ]; then
+          $bin/magiskboot cpio ramdisk.cpio test;
+          magisk_patched=$?;
+        fi;
+        if [ $((magisk_patched & 3)) -eq 1 ]; then
+          ui_print " " "Magisk detected! Patching kernel so reflashing Magisk is not necessary...";
+          comp=$($bin/magiskboot decompress kernel 2>&1 | grep -vE 'raw|zimage' | sed -n 's;.*\[\(.*\)\];\1;p');
+          ($bin/magiskboot split $kernel || $bin/magiskboot decompress $kernel kernel) 2>/dev/null;
+          if [ $? != 0 -a "$comp" ] && $comp --help 2>/dev/null; then
+            echo "Attempting kernel unpack with busybox $comp..." >&2;
+            $comp -dc $kernel > kernel;
+          fi;
+          $bin/magiskboot hexpatch kernel 736B69705F696E697472616D667300 77616E745F696E697472616D667300;
+          if [ "$(file_getprop $home/anykernel.sh do.systemless)" == 1 ]; then
+            strings kernel | grep -E -m1 'Linux version.*#' > $home/vertmp;
+          fi;
+          if [ "$comp" ]; then
+            $bin/magiskboot compress=$comp kernel kernel.$comp;
+            if [ $? != 0 ] && $comp --help 2>/dev/null; then
+              echo "Attempting kernel repack with busybox $comp..." >&2;
+              $comp -9c kernel > kernel.$comp;
+            fi;
+            mv -f kernel.$comp kernel;
+          fi;
+          [ ! -f .magisk ] && $bin/magiskboot cpio ramdisk.cpio "extract .backup/.magisk .magisk";
+          export $(cat .magisk);
+          [ $((magisk_patched & 8)) -ne 0 ] && export TWOSTAGEINIT=true;
+          for fdt in dtb extra kernel_dtb recovery_dtbo; do
+            [ -f $fdt ] && $bin/magiskboot dtb $fdt patch;
+          done;
+        else
+          case $kernel in
+            *-dtb) rm -f kernel_dtb;;
+          esac;
+        fi;
+        unset magisk_patched KEEPFORCEENCRYPT KEEPVERITY SHA1 TWOSTAGEINIT; # leave PATCHVBMETAFLAG set for repack
+      ;;
+    esac;
+    case $ramdisk_compression in
+      none|cpio) nocompflag="-n";;
+    esac;
+    case $patch_vbmeta_flag in
+      auto|"") [ "$PATCHVBMETAFLAG" ] || export PATCHVBMETAFLAG=false;;
+      1) export PATCHVBMETAFLAG=true;;
+      *) export PATCHVBMETAFLAG=false;;
+    esac;
+    $bin/magiskboot repack $nocompflag $bootimg $home/boot-new.img;
+    unset PATCHVBMETAFLAG;
+  fi;
+  if [ $? != 0 ]; then
+    abort "Repacking image failed. Aborting...";
+  fi;
+  [ -f .magisk ] && touch $home/magisk_patched;
+
+  cd $home;
+  if [ -f "$bin/futility" -a -d "$bin/chromeos" ]; then
+    if [ -f "$split_img/chromeos" ]; then
+      echo "Signing with CHROMEOS..." >&2;
+      $bin/futility vbutil_kernel --pack boot-new-signed.img --keyblock $bin/chromeos/kernel.keyblock --signprivate $bin/chromeos/kernel_data_key.vbprivk --version 1 --vmlinuz boot-new.img --bootloader $bin/chromeos/empty --config $bin/chromeos/empty --arch arm --flags 0x1;
+    fi;
+    [ $? != 0 ] && signfail=1;
+  fi;
+  if [ -f "$bin/boot_signer-dexed.jar" -a -d "$bin/avb" ]; then
+    pk8=$(ls $bin/avb/*.pk8);
+    cert=$(ls $bin/avb/*.x509.*);
+    case $block in
+      *recovery*|*SOS*) avbtype=recovery;;
+      *) avbtype=boot;;
+    esac;
+    if [ "$(/system/bin/dalvikvm -Xnoimage-dex2oat -cp $bin/boot_signer-dexed.jar com.android.verity.BootSignature -verify boot.img 2>&1 | grep VALID)" ]; then
+      echo "Signing with AVBv1..." >&2;
+      /system/bin/dalvikvm -Xnoimage-dex2oat -cp $bin/boot_signer-dexed.jar com.android.verity.BootSignature /$avbtype boot-new.img $pk8 $cert boot-new-signed.img;
+    fi;
+  fi;
+  if [ $? != 0 -o "$signfail" ]; then
+    abort "Signing image failed. Aborting...";
+  fi;
+  mv -f boot-new-signed.img boot-new.img 2>/dev/null;
+
+  if [ ! -f boot-new.img ]; then
+    abort "No repacked image found to flash. Aborting...";
+  elif [ "$(wc -c < boot-new.img)" -gt "$(wc -c < boot.img)" ]; then
+    abort "New image larger than target partition. Aborting...";
+  fi;
+  blockdev --setrw $block 2>/dev/null;
+  if [ -f "$bin/flash_erase" -a -f "$bin/nandwrite" ]; then
+    $bin/flash_erase $block 0 0;
+    $bin/nandwrite -p $block boot-new.img;
+  elif [ "$customdd" ]; then
+    dd if=/dev/zero of=$block $customdd 2>/dev/null;
+    dd if=boot-new.img of=$block $customdd;
+  else
+    cat boot-new.img /dev/zero > $block 2>/dev/null || true;
+  fi;
+  if [ $? != 0 ]; then
+    abort "Flashing image failed. Aborting...";
+  fi;
+}
+
+# flash_generic <name>
+flash_generic() {
+  local file img imgblock isro path;
+
+  cd $home;
+  for file in $1 $1.img; do
+    if [ -f $file ]; then
+      img=$file;
+      break;
+    fi;
+  done;
+
+  if [ "$img" -a ! -f ${1}_flashed ]; then
+    for path in /dev/block/bootdevice/by-name /dev/block/mapper; do
+      for file in $1 $1$slot; do
+        if [ -e $path/$file ]; then
+          imgblock=$path/$file;
+          break 2;
+        fi;
+      done;
+    done;
+    if [ ! "$imgblock" ]; then
+      abort "$1 partition could not be found. Aborting...";
+    fi;
+    # TODO: add dynamic partition resizing using lptools_static instead of aborting
+    if [ "$(wc -c < $img)" -gt "$(wc -c < $imgblock)" ]; then
+      abort "New $1 image larger than $1 partition. Aborting...";
+    fi;
+    isro=$(blockdev --getro $imgblock 2>/dev/null);
+    blockdev --setrw $imgblock 2>/dev/null;
+    if [ ! "$no_block_display" ]; then
+      ui_print " " "$imgblock";
+    fi;
+    if [ -f "$bin/flash_erase" -a -f "$bin/nandwrite" ]; then
+      $bin/flash_erase $imgblock 0 0;
+      $bin/nandwrite -p $imgblock $img;
+    elif [ "$customdd" ]; then
+      dd if=/dev/zero of=$imgblock 2>/dev/null;
+      dd if=$img of=$imgblock;
+    else
+      cat $img /dev/zero > $imgblock 2>/dev/null || true;
+    fi;
+    if [ $? != 0 ]; then
+      abort "Flashing $1 failed. Aborting...";
+    fi;
+    if [ "$isro" != 0 ]; then
+      blockdev --setro $imgblock 2>/dev/null;
+    fi;
+    touch ${1}_flashed;
+  fi;
+}
+
+# flash_dtbo (backwards compatibility for flash_generic)
+flash_dtbo() { flash_generic dtbo; }
+
+### write_boot (repack ramdisk then build, sign and write image, vendor_dlkm and dtbo)
+write_boot() {
+  flash_generic vendor_dlkm; # TODO: move below boot once resizing is supported
+  repack_ramdisk;
+  flash_boot;
+  flash_generic vendor_boot; # temporary until hdr v4 can be unpacked/repacked fully by magiskboot
+  flash_generic dtbo;
+}
+###
+
+### file editing functions:
+# backup_file <file>
+backup_file() { [ ! -f $1~ ] && cp -fp $1 $1~; }
+
+# restore_file <file>
+restore_file() { [ -f $1~ ] && cp -fp $1~ $1; rm -f $1~; }
+
+# replace_string <file> <if search string> <original string> <replacement string> <scope>
+replace_string() {
+  [ "$5" == "global" ] && local scope=g;
+  if ! grep -q "$2" $1; then
+    sed -i "s;${3};${4};${scope}" $1;
+  fi;
+}
+
+# replace_section <file> <begin search string> <end search string> <replacement string>
+replace_section() {
+  local begin endstr last end;
+  begin=$(grep -n -m1 "$2" $1 | cut -d: -f1);
+  if [ "$begin" ]; then
+    if [ "$3" == " " -o ! "$3" ]; then
+      endstr='^[[:space:]]*$';
+      last=$(wc -l $1 | cut -d\  -f1);
+    else
+      endstr="$3";
+    fi;
+    for end in $(grep -n "$endstr" $1 | cut -d: -f1) $last; do
+      if [ "$end" ] && [ "$begin" -lt "$end" ]; then
+        sed -i "${begin},${end}d" $1;
+        [ "$end" == "$last" ] && echo >> $1;
+        sed -i "${begin}s;^;${4}\n;" $1;
+        break;
+      fi;
+    done;
+  fi;
+}
+
+# remove_section <file> <begin search string> <end search string>
+remove_section() {
+  local begin endstr last end;
+  begin=$(grep -n -m1 "$2" $1 | cut -d: -f1);
+  if [ "$begin" ]; then
+    if [ "$3" == " " -o ! "$3" ]; then
+      endstr='^[[:space:]]*$';
+      last=$(wc -l $1 | cut -d\  -f1);
+    else
+      endstr="$3";
+    fi;
+    for end in $(grep -n "$endstr" $1 | cut -d: -f1) $last; do
+      if [ "$end" ] && [ "$begin" -lt "$end" ]; then
+        sed -i "${begin},${end}d" $1;
+        break;
+      fi;
+    done;
+  fi;
+}
+
+# insert_line <file> <if search string> <before|after> <line match string> <inserted line>
+insert_line() {
+  local offset line;
+  if ! grep -q "$2" $1; then
+    case $3 in
+      before) offset=0;;
+      after) offset=1;;
+    esac;
+    line=$((`grep -n -m1 "$4" $1 | cut -d: -f1` + offset));
+    if [ -f $1 -a "$line" ] && [ "$(wc -l $1 | cut -d\  -f1)" -lt "$line" ]; then
+      echo "$5" >> $1;
+    else
+      sed -i "${line}s;^;${5}\n;" $1;
+    fi;
+  fi;
+}
+
+# replace_line <file> <line replace string> <replacement line> <scope>
+replace_line() {
+  local lines line;
+  if grep -q "$2" $1; then
+    lines=$(grep -n "$2" $1 | cut -d: -f1 | sort -nr);
+    [ "$4" == "global" ] || lines=$(echo "$lines" | tail -n1);
+    for line in $lines; do
+      sed -i "${line}s;.*;${3};" $1;
+    done;
+  fi;
+}
+
+# remove_line <file> <line match string> <scope>
+remove_line() {
+  local lines line;
+  if grep -q "$2" $1; then
+    lines=$(grep -n "$2" $1 | cut -d: -f1 | sort -nr);
+    [ "$3" == "global" ] || lines=$(echo "$lines" | tail -n1);
+    for line in $lines; do
+      sed -i "${line}d" $1;
+    done;
+  fi;
+}
+
+# prepend_file <file> <if search string> <patch file>
+prepend_file() {
+  if ! grep -q "$2" $1; then
+    echo "$(cat $patch/$3 $1)" > $1;
+  fi;
+}
+
+# insert_file <file> <if search string> <before|after> <line match string> <patch file>
+insert_file() {
+  local offset line;
+  if ! grep -q "$2" $1; then
+    case $3 in
+      before) offset=0;;
+      after) offset=1;;
+    esac;
+    line=$((`grep -n -m1 "$4" $1 | cut -d: -f1` + offset));
+    sed -i "${line}s;^;\n;" $1;
+    sed -i "$((line - 1))r $patch/$5" $1;
+  fi;
+}
+
+# append_file <file> <if search string> <patch file>
+append_file() {
+  if ! grep -q "$2" $1; then
+    echo -ne "\n" >> $1;
+    cat $patch/$3 >> $1;
+    echo -ne "\n" >> $1;
+  fi;
+}
+
+# replace_file <file> <permissions> <patch file>
+replace_file() {
+  cp -pf $patch/$3 $1;
+  chmod $2 $1;
+}
+
+# patch_fstab <fstab file> <mount match name> <fs match type> block|mount|fstype|options|flags <original string> <replacement string>
+patch_fstab() {
+  local entry part newpart newentry;
+  entry=$(grep "$2[[:space:]]" $1 | grep "$3");
+  if [ ! "$(echo "$entry" | grep "$6")" -o "$6" == " " -o ! "$6" ]; then
+    case $4 in
+      block) part=$(echo "$entry" | awk '{ print $1 }');;
+      mount) part=$(echo "$entry" | awk '{ print $2 }');;
+      fstype) part=$(echo "$entry" | awk '{ print $3 }');;
+      options) part=$(echo "$entry" | awk '{ print $4 }');;
+      flags) part=$(echo "$entry" | awk '{ print $5 }');;
+    esac;
+    newpart=$(echo "$part" | sed -e "s;${5};${6};" -e "s; ;;g" -e 's;,\{2,\};,;g' -e 's;,*$;;g' -e 's;^,;;g');
+    newentry=$(echo "$entry" | sed "s;${part};${newpart};");
+    sed -i "s;${entry};${newentry};" $1;
+  fi;
+}
+
+# patch_cmdline <cmdline entry name> <replacement string>
+patch_cmdline() {
+  local cmdfile cmdtmp match;
+  if [ -f "$split_img/cmdline.txt" ]; then
+    cmdfile=$split_img/cmdline.txt;
+  else
+    cmdfile=$home/cmdtmp;
+    grep "^cmdline=" $split_img/header | cut -d= -f2- > $cmdfile;
+  fi;
+  if ! grep -q "$1" $cmdfile; then
+    cmdtmp=$(cat $cmdfile);
+    echo "$cmdtmp $2" > $cmdfile;
+    sed -i -e 's;  *; ;g' -e 's;[ \t]*$;;' $cmdfile;
+  else
+    match=$(grep -o "$1.*$" $cmdfile | cut -d\  -f1);
+    sed -i -e "s;${match};${2};" -e 's;  *; ;g' -e 's;[ \t]*$;;' $cmdfile;
+  fi;
+  if [ -f "$home/cmdtmp" ]; then
+    sed -i "s|^cmdline=.*|cmdline=$(cat $cmdfile)|" $split_img/header;
+    rm -f $cmdfile;
+  fi;
+}
+
+# patch_prop <prop file> <prop name> <new prop value>
+patch_prop() {
+  if ! grep -q "^$2=" $1; then
+    echo -ne "\n$2=$3\n" >> $1;
+  else
+    local line=$(grep -n -m1 "^$2=" $1 | cut -d: -f1);
+    sed -i "${line}s;.*;${2}=${3};" $1;
+  fi;
+}
+
+# patch_ueventd <ueventd file> <device node> <permissions> <chown> <chgrp>
+patch_ueventd() {
+  local file dev perm user group newentry line;
+  file=$1; dev=$2; perm=$3; user=$4;
+  shift 4;
+  group="$@";
+  newentry=$(printf "%-23s   %-4s   %-8s   %s\n" "$dev" "$perm" "$user" "$group");
+  line=$(grep -n -m1 "$dev" $file | cut -d: -f1);
+  if [ "$line" ]; then
+    sed -i "${line}s;.*;${newentry};" $file;
+  else
+    echo -ne "\n$newentry\n" >> $file;
+  fi;
+}
+###
+
+### configuration/setup functions:
+# reset_ak [keep]
+reset_ak() {
+  local current i;
+
+  current=$(dirname $home/*-files/current);
+  if [ -d "$current" ]; then
+    for i in $bootimg $home/boot-new.img; do
+      [ -e $i ] && cp -af $i $current;
+    done;
+    for i in $current/*; do
+      [ -f $i ] && rm -f $home/$(basename $i);
+    done;
+  fi;
+  [ -d $split_img ] && rm -rf $ramdisk;
+  rm -rf $bootimg $split_img $home/*-new* $home/*-files/current;
+
+  if [ "$1" == "keep" ]; then
+    [ -d $home/rdtmp ] && mv -f $home/rdtmp $ramdisk;
+  else
+    rm -rf $patch $home/rdtmp;
+  fi;
+  if [ ! "$no_block_display" ]; then
+    ui_print " ";
+  fi;
+  setup_ak;
+}
+
+# setup_ak
+setup_ak() {
+  local blockfiles parttype name part mtdmount mtdpart mtdname target;
+
+  # slot detection enabled by is_slot_device=1 or auto (from anykernel.sh)
+  case $is_slot_device in
+    1|auto)
+      slot=$(getprop ro.boot.slot_suffix 2>/dev/null);
+      [ "$slot" ] || slot=$(grep -o 'androidboot.slot_suffix=.*$' /proc/cmdline | cut -d\  -f1 | cut -d= -f2);
+      if [ ! "$slot" ]; then
+        slot=$(getprop ro.boot.slot 2>/dev/null);
+        [ "$slot" ] || slot=$(grep -o 'androidboot.slot=.*$' /proc/cmdline | cut -d\  -f1 | cut -d= -f2);
+        [ "$slot" ] && slot=_$slot;
+      fi;
+      if [ "$slot" ]; then
+        if [ -d /postinstall/tmp -a ! "$slot_select" ]; then
+          slot_select=inactive;
+        fi;
+        case $slot_select in
+          inactive)
+            case $slot in
+              _a) slot=_b;;
+              _b) slot=_a;;
+            esac;
+          ;;
+        esac;
+      fi;
+      if [ ! "$slot" -a "$is_slot_device" == 1 ]; then
+        abort "Unable to determine active slot. Aborting...";
+      fi;
+    ;;
+  esac;
+
+  # automate simple multi-partition setup for boot_img_hdr_v3 + vendor_boot
+  cd $home;
+  if [ -e "/dev/block/bootdevice/by-name/vendor_boot$slot" -a ! -f vendor_setup ] && [ -f dtb -o -d vendor_ramdisk -o -d vendor_patch ]; then
+    echo "Setting up for simple automatic vendor_boot flashing..." >&2;
+    (mkdir boot-files;
+    mv -f Image* ramdisk patch boot-files;
+    mkdir vendor_boot-files;
+    mv -f dtb vendor_boot-files;
+    mv -f vendor_ramdisk vendor_boot-files/ramdisk;
+    mv -f vendor_patch vendor_boot-files/patch) 2>/dev/null;
+    touch vendor_setup;
+  fi;
+
+  # allow multi-partition ramdisk modifying configurations (using reset_ak)
+  if [ "$block" ] && [ ! -d "$ramdisk" -a ! -d "$patch" ]; then
+    blockfiles=$home/$(basename $block)-files;
+    if [ "$(ls $blockfiles 2>/dev/null)" ]; then
+      cp -af $blockfiles/* $home;
+    else
+      mkdir $blockfiles;
+    fi;
+    touch $blockfiles/current;
+  fi;
+
+  # target block partition detection enabled by block=boot recovery or auto (from anykernel.sh)
+  case $block in
+     auto|"") block=boot;;
+  esac;
+  case $block in
+    boot|recovery|vendor_boot)
+      case $block in
+        boot) parttype="ramdisk init_boot boot BOOT LNX android_boot bootimg KERN-A kernel KERNEL";;
+        recovery) parttype="ramdisk_recovery recovery RECOVERY SOS android_recovery";;
+        vendor_boot) parttype="vendor_boot";;
+      esac;
+      for name in $parttype; do
+        for part in $name$slot $name; do
+          if [ "$(grep -w "$part" /proc/mtd 2> /dev/null)" ]; then
+            mtdmount=$(grep -w "$part" /proc/mtd);
+            mtdpart=$(echo $mtdmount | cut -d\" -f2);
+            if [ "$mtdpart" == "$part" ]; then
+              mtdname=$(echo $mtdmount | cut -d: -f1);
+            else
+              abort "Unable to determine mtd $block partition. Aborting...";
+            fi;
+            if [ -e /dev/mtd/$mtdname ]; then
+              target=/dev/mtd/$mtdname;
+            fi;
+          elif [ -e /dev/block/by-name/$part ]; then
+            target=/dev/block/by-name/$part;
+          elif [ -e /dev/block/bootdevice/by-name/$part ]; then
+            target=/dev/block/bootdevice/by-name/$part;
+          elif [ -e /dev/block/platform/*/by-name/$part ]; then
+            target=/dev/block/platform/*/by-name/$part;
+          elif [ -e /dev/block/platform/*/*/by-name/$part ]; then
+            target=/dev/block/platform/*/*/by-name/$part;
+          elif [ -e /dev/$part ]; then
+            target=/dev/$part;
+          fi;
+          [ "$target" ] && break 2;
+        done;
+      done;
+      if [ "$target" ]; then
+        block=$(ls $target 2>/dev/null);
+      else
+        abort "Unable to determine $block partition. Aborting...";
+      fi;
+    ;;
+    *)
+      if [ "$slot" ]; then
+        [ -e "$block$slot" ] && block=$block$slot;
+      fi;
+    ;;
+  esac;
+  if [ ! "$no_block_display" ]; then
+    ui_print "$block";
+  fi;
+}
+###
+
+### end methods
+
+setup_ak;