termux_adbroot.sh

#!/bin/bash
set -euo pipefail

process() {
  local adb_addr pair_code pair_addr vars="$(
    set -euo pipefail
    magick "$1" -white-threshold 30% -black-threshold 20% PNG:- |
    tesseract --psm 3 stdin stdout |
    sed -E 's/^\w\s//' |
    tr '\n' '#' |
    grep -oEe '#(IP address & Port#[0-9.]+:[0-9]+|Wi-Fi pairing code#[0-9]+)#' |
    tee /dev/stderr |
    cut -d# -f3 |
    xargs printf 'adb_addr=%q\npair_code=%q\npair_addr=%q\n'
  )" || {
    echo failed to process screenshot >&2
    return 1
  }
  eval "$vars"

  if [[ -n "$adb_addr" ]] && [[ -n "$pair_code" ]] && [[ -z "$pair_addr" ]]
  then
    pair_addr="$pair_code"
    pair_code="$adb_addr"
    adb_addr=
  fi

  printf "adb_addr=%q\npair_code=%q\npair_addr=%q\n" "$adb_addr" "$pair_code" "$pair_addr" >&2

  if [[ -n "$adb_addr" ]]
  then
    if [[ "$adb_addr" != *":"* ]]
    then
      echo invalid adb addr >&2
      return 1
    fi
  fi

  if [[ -n "$pair_code" ]] || [[ -n "$pair_addr" ]]
  then
    if [[ "$pair_addr" != *":"* ]]
    then
      echo invalid pair addr >&2
      return 1
    fi
    if [[ -z "$pair_code" ]]
    then
      echo invalid pair code >&2
      return 1
    fi
  fi

  printf "adb_addr=%q\npair_code=%q\npair_addr=%q\n" "$adb_addr" "$pair_code" "$pair_addr"
}

screenshot() {
  local scr
  while true
  do
    sleep .1
    for spec in "2 seconds ago" "1 second ago" "now" "1 second" "2 seconds"
    do
      for scr in "/sdcard/Pictures/Screenshots/Screenshot_$(date --date="$spec" +"%Y%m%d-%I%M%S")_Settings.png"
      do
        if [[ -f "$scr" ]]
        then
          echo "$scr"
          return 0
        fi
      done
    done
  done
}

while true
do
  echo waiting for screenshot
  scr="$(set -e; screenshot)"

  echo "processing $scr"
  eval "$(set -e; process "$scr")"
  rm -v "$scr"

  if [[ -n "$pair_code" ]]
  then
    echo pairing
    adb disconnect
    adb pair "$pair_addr" "$pair_code"
    continue
  fi

  echo connecting
  adb disconnect
  adb connect "$adb_addr"

  echo checking if rooted
  whoami="$(set -e; adb shell whoami)"

  if [[ -z "$whoami" ]]
  then
    echo failed to get user >&2
    exit 1
  fi

  if [[ "$whoami" != "root" ]]
  then
    echo rooting
    timeout 1 adb root || true
    adb disconnect
    continue
  fi

  break
done

echo starting shizuku
adb shell sh /storage/emulated/0/Android/data/moe.shizuku.privileged.api/start.sh