A painter and a black cat

#!/bin/bash

# zlib_extraction.sh ver 2.0

# 引数のファイルに含まれるzlib圧縮部分を抽出・展開してファイルに保存する

# 2015.10.06 kanata

if [ ! -f "${1}" ]

then

echo "file open error ($1)"

exit 1

fi

if echo "${2}" |egrep '(BOOST|boost|Boost)' >/dev/null

then

MODE="BOOST_MODE"

else

MODE="NORMAL_MODE"

fi

FILESIZE=`ls -l ${1}|awk '{print $5}'`

ZLIBPART="${1##*/}"

ZLIBPART="${ZLIBPART%.*}"

I="0"

FORK_COUNT="0"

if [ "${MODE}" = "NORMAL_MODE" ]

then

#--------------#

# シリアル処理 #

#--------------#

while [ "${I}" -lt "${FILESIZE}" ]

do

ZLIBPART_FILE="${ZLIBPART}_${I}.bin"

cat ${1} | dd bs=1 skip=${I} | openssl zlib -d > ${ZLIBPART_FILE} 2>/dev/null

if [ -s ${ZLIBPART_FILE} ]

then

file ${ZLIBPART_FILE}

else

rm -f ${ZLIBPART_FILE}

fi

echo -ne "checking.. "`printf "%d/%d" "${I}" "${FILESIZE}"`" \r"

I=$(( I + 1 ))

done

else

#----------#

# 並列処理 #

#----------#

while [ "${I}" -lt "${FILESIZE}" ]

do

ZLIBPART_FILE="${ZLIBPART}_${I}.bin"

( cat ${1} | dd bs=1 skip=${I} | openssl zlib -d > ${ZLIBPART_FILE} 2>/dev/null ; if [ -s ${ZLIBPART_FILE} ] ; then file ${ZLIBPART_FILE} ; else rm -f ${ZLIBPART_FILE} ; fi )&

# 並列実行時のサブシェルが増大していくのを抑止

# 同時35多重までに抑止 25回に1度チェック ( 数値を弄ってチューニングできます )

if [ $(( I % 25 )) -eq "0" ] ; then FORK_COUNT=`ps -u |fgrep -c ${0}` ; fi

while [ "${FORK_COUNT}" -gt "35" ]

do

printf "[WARNING] SubProcess Exceed Limit. fork:%s offset:%s\n" ${FORK_COUNT} ${I}

FORK_COUNT=`ps -u |fgrep -c ${0}`

done

echo -ne "checking.. "`printf "%d/%d" "${I}" "${FILESIZE}"`" \r"

I=$(( I + 1 ))

done

fi

exit 0