My attempt to make update.zip sane (top of the script) + easy way for messing with initramfs contents on galaxy mini (tass)

update-binary

#!/sbin/sh
# Author: Swift Geek
#Break on any errors
set -e
#
# arg 1 is API version, according to source should be 3, previous ones can trash radio.
#
# arg 2 is the pipefd "API", https://github.com/CyanogenMod/android_bootable_recovery/blob/7d531818bdd94f7dc02bd5faeb882b4f14643999/install.c
# communicate with it using the recovery api (Whole 3 commands)
# progress <frac> <secs> # Unavailable on my devices
# set_progress <frac> # Unavailable on my devices
# ui_print <string> # Doesn't interpret new lines inside string, no arg == print new line
#
# arg 3 is the zip file path including filename
pipefd="$2"
zippath="$3" # if path to zipfile - change to $*_path
# TODO: redo all "API" functions from edify
# TODO: check lockfiles
# TODO: Clean tmpdir and delete it afterwards
# TODO: Actually flash image "usage: flash_image partition file.img"
# TODO: dump_image instead of dd (so no need to guess partition)


ui_print () {
  # TIP: the lowest line is never visible on tass!! So making dotted progress bar is impossible for now
  n_sub='\nui_print\n' # substitute every new line with this
  #ui_string="${*//\\\n/$n_sub}"
  printf "ui_print ${*//\\\n/$n_sub}\n" > "/proc/self/fd/$pipefd"
  #  printf "ui_print\n" > "/proc/self/fd/$pipefd" #Assume that every line should be visible, for now
}

set_progress () {
  # Doens't work on Apollo with CWM5.0.2.8 and any of my CWM6 devices
  #TODO: check if arg is only one (otherwise print warning that perhaps "progress" should be used instead), check if parse-able
  #WARNING: set_progress\n will kill update-binary . Make sure that this doesn't happen
  printf "set_progress $1\n" > "/proc/self/fd/$pipefd"
}

progress () {
  #Works for me only in CWM5, also in very strange way: has to be commited with `progress 0 0` if $2 was 0
  #   Progress 0 0 to end timer
  #   Also accepts negative values!
  #TODO: ignore or parse comma as separator (find and replace propably to space, somehow recall function to get args reparsed, check if not too deep with export var)
  # change ', ' to ' ', then ',' to ' ' to make sure that comma-edify-compatibility exist in easiest way
  printf "progress $*\n" > "/proc/self/fd/$pipefd"
}

ui_print "Pipefd:	${pipefd}\n"
ui_print "PID: $$\n"
#ui_print "ZIP path:	$zippath\n"
#sleep 360
#exit 0

#### REPACKING PART ORIGINALLY FROM:
#### PSN>> Memory-MOD-v2 & SWAPALL-v3.0
####         CM10.1 JB
######################################
#### This script (containing snippets and binary from one mentioned above) is just for easier manual editting of initramfs all it does is:
#### 1. Extract&&Unpack initramfs
#### 2. Creates "lock"file and waits for its deletion
#### 3. Repackages and flashes resulting boot.img
#### TODO: Find open source version of mkbootimg and unpack_bootimg
#### TODO: Clean dirs in /tmp first or create own tmpdir; USE `mktemp` from shell -.-!
#### Changes brought to You by: Swift Geek

tmpdir='/tmp/bootimg_edit'
bootimg="$tmpdir/bootimg"
patching="$tmpdir/patching"
workboot="$tmpdir/workboot"
tools="$tmpdir/tools"

#TODO: Unpack, chmod and create dirs
rm -rf $tmpdir || true
mkdir -p $tools
mkdir -p $bootimg
mkdir -p $patching
mkdir -p $workboot
cd $tmpdir
unzip $zippath tools/bootimgtools # $2 here is path inside zip
cd $tools
ln -s ./bootimgtools mkbootimg
ln -s ./bootimgtools unpack_bootimg
chmod a+x bootimgtools
chmod a+x mkbootimg
chmod a+x unpack_bootimg


set_progress 0.3, 0
ui_print "|                              |\n"
ui_print "| Extracting RAMDISK from your |\n"
ui_print "|  current kernel to:          |\n"
ui_print "|$patching\n"

#dd if=/dev/block/bml8 of=$workboot/boot.img bs=4096
dump_image boot $workboot/boot.img

$tools/unpack_bootimg -i $workboot/boot.img -o $workboot/
set_progress 0.4, 0
ui_print "|                              |\n"
cp $workboot/boot.img-zImage $bootimg/boot.img-zImage
cp $workboot/boot.img-ramdisk.gz $patching/boot.img-ramdisk.gz
cd $patching; gunzip -c $patching/boot.img-ramdisk.gz | cpio -i
rm $patching/boot.img-ramdisk.gz
set_progress 0.5, 0

ui_print "|Entering infinity loop ...    |\n"
ui_print "|Delete lockfile to continue:  |\n"
ui_print "| /tmp/psn.lock                |\n"
touch /tmp/psn.lock;
while [ -e /tmp/psn.lock ]; do sleep 1; done;

set_progress 0.6, 0
ui_print "|                              |\n"
ui_print "|Compressing RAMDISK...        |\n"
cd $patching
find . | cpio -o -H newc | gzip > $bootimg/boot.img-ramdisk.gz;

set_progress 0.7, 0
ui_print "|                              |\n"
ui_print "|Creating boot.img for flashing|\n"
$tools/mkbootimg --kernel $bootimg/boot.img-zImage --ramdisk $bootimg/boot.img-ramdisk.gz --base 13600000 --pagesize 4096 -o /tmp/boot.img
set_progress 0.8, 0

ui_print "|                              |\n"
ui_print "|Flashing modified boot.img ...|\n"
flash_image boot /tmp/boot.img
ui_print "|  Done!  Reboot system now!   |\n"
# TODO: Clean, add cases for unsuccesful flash and catch errors for stuff before flash_image line - to display "nothing wrong happened"
# TODO: Add cases where flash_image and/or dump_image are not included in recovery
# TODO: Instructions on how to pass update.zip to recovery from android systemy, check Xposed source perhaps
ui_print "|______________________________|\n"