amx_boost

#!/bin/bash

# ====================================================
# AMX_Manager Copyright(C) 2018 Furkan Türkal
# This program comes with ABSOLUTELY NO WARRANTY; This is free software,
# and you are welcome to redistribute it under certain conditions; See
# file LICENSE, which is part of this source code package, for details.
# ====================================================

# Reference -> https://gist.github.com/pklaus/837023

ICON_RAM='/usr/share/icons/gnome/32x32/status/stock_dialog-info.png'

# Check for required applications
command -v notify-send >/dev/null 2>&1 || { echo >&2 "AMX_Boost: I require 'notify-send' but it's not installed! Aborting.";   exit 1; }
command -v sudo        >/dev/null 2>&1 || { echo >&2 "AMX_Boost: I require 'sudo' but it's not installed! Aborting.";          exit 1; }
command -v sync        >/dev/null 2>&1 || { echo >&2 "AMX_Boost: I require 'sync' but it's not installed! Aborting.";          exit 1; }

if [ "$(whoami)" != "root" ]; then
  echo "You have to run this script as Root!"
  exit 1
fi

function boost_RAM() {
  # Get Memory Information
  memory_total=$(cat /proc/meminfo | grep MemTotal | tr -s ' ' | cut -d ' ' -f2) && memory_total=$(echo "$memory_total/1024.0" | bc)
  memory_free_before=$(cat /proc/meminfo | grep MemFree | tr -s ' ' | cut -d ' ' -f2) && memory_free_before=$(echo "$memory_free_before/1024.0" | bc)
  memory_cached_before=$(cat /proc/meminfo | grep "^Cached" | tr -s ' ' | cut -d ' ' -f2) && memory_cached_before=$(echo "$memory_cached_before/1024.0" | bc)

  # Output Information
  echo -e "[RAM] Boost operation starting..."
  echo -e "Cached : $memory_cached_before MiB" 
  echo -e "Free   : $memory_free_before MiB"

  # Test sync
  if [ "$?" != "0" ]
  then
    echo "Something went wrong!"
    exit 1
  fi

  # Clear Filesystem Buffer using "sync" and Clear Caches
  sync && echo 3 > /proc/sys/vm/drop_caches

  memory_free_after=$(cat /proc/meminfo | grep MemFree | tr -s ' ' | cut -d ' ' -f2) && memory_free_after=$(echo "$memory_free_after/1024.0" | bc)

  # Output Summary
  percentage_free_before=$((100 * $memory_free_before / $memory_total))
  percentage_free_after=$((100 * $memory_free_after / $memory_total))
  percentage_freed=$(($percentage_free_after - $percentage_free_before))

  echo -e "[RAM] Boost operation completed successfully!"
  echo -e "Freed : (%$percentage_freed) -> $(echo "$memory_free_after - $memory_free_before" | bc) MiB " 
  echo -e "Free  : $memory_free_after MiB"

  DISPLAY=:0.0 su $USER -c "/usr/bin/notify-send -i "$ICON_RAM" -a 'AMX_Boost' -u normal 'RAM Boosted (percentage_freed)'"
}

function boost_TEMP() {
  echo -e "...SOON..."
  exit 2
}

function boost_CACHE() {
  echo -e "...SOON..."
  exit 2
}

main() {
  case "$1" in
        ram)
            boost_RAM
            ;;
        temp) 
            boost_TEMP
            ;;
        cache)
            boost_CACHE
            ;;
        pacman-soft)
            paccache -dvuk0
            ;;
        pacman)
            paccache -rv
            ;;
        pacman-hard)
            pacman -Scc
            ;;
        *)
            printf "amx_boost <command>\\n"
            printf "          ram\\n"
            printf "          temp\\n"
            printf "          cache\\n"

        esac
}

main "$@"