#!/bin/bash

help() {
    echo "$0 -p <packageName> [-v]"
}

SHORT_PARAM="vp:"
LONG_PARAM="pkg"

GETOPT="getopt"

FILE_FDS="/tmp/fds"
FILE_LAST_FDS="/tmp/last_fds"

if [ "$SHORT_PARAM" ] ; then GETOPT="$GETOPT -o $SHORT_PARAM" ; fi
if [ "$LONG_PARAM" ] ; then GETOPT="$GETOPT --long $LONG_PARAM" ; fi

NEW_PARAMS=`$GETOPT -n $0 -- "$@"`

eval set -- "$NEW_PARAMS"

verbose=false
while true ; do
    case $1 in
        -v) verbose=true ; shift ;;
        -p|--pkg) packageName="$2"; shift 2;;
        --) shift ; break ;;
    esac
done

if [ ! "$packageName" ] ; then echo "Usage: $0 -p <packageName>"; exit 1; fi

pid=`adb shell ps -ef|grep com.android.browser$|sed 's/[[:space:]]\+/ /g'|cut -d' ' -f2`

if [ ! "$pid" ] ; then echo "pid of $packageName is not exists"; exit 1; fi

if [ -f "${FILE_FDS}_$pid" ] ; then mv "${FILE_FDS}_$pid" "${FILE_LAST_FDS}_$pid"; fi

adb shell ls -l /proc/$pid/fd |cut -d' ' -f1,2,3,4,5,8,9,10 | sort > "${FILE_FDS}_$pid"

if [ ! -f "${FILE_LAST_FDS}_$pid" ] ; then echo "Fds file init finished."; exit 0; fi

newFds=`comm -13 "${FILE_LAST_FDS}_$pid" "${FILE_FDS}_$pid"`
freedFds=`comm -23 "${FILE_LAST_FDS}_$pid" "${FILE_FDS}_$pid"`

if [ "$newFds" ] ; then newCount=`echo "$newFds" |wc -l`; else newCount="0" ; fi
if [ "$freedFds" ] ; then freedCount=`echo "$freedFds"|wc -l`; else freedCount="0" ; fi
totalCount=`wc -l ${FILE_FDS}_$pid |cut -d' ' -f1`

if $verbose ; then
    if [ "$newFds" ] ; then
        echo "New fds: $newCount"
        echo "$newFds"
        echo
    fi

    if [ "$freedFds" ] ; then
        echo "Freed fds: $freedCount"
        echo "$freedFds"
        echo
    fi
fi

echo "total: $totalCount"
echo "New fds: $newCount"
echo "Freed fds: $freedCount"