zlib_extraction.sh
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#!/bin/bash |
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# zlib_extraction.sh ver 2.0 |
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# 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 |
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# 2015.10.06 kanata |
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if [ ! -f "${1}" ]
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then |
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echo "file open error ($1)" |
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exit 1 |
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fi |
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if echo "${2}" |egrep '(BOOST|boost|Boost)' >/dev/null
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then |
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MODE="BOOST_MODE" |
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else |
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MODE="NORMAL_MODE" |
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fi |
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FILESIZE=`ls -l ${1}|awk '{print $5}'`
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ZLIBPART="${1##*/}"
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ZLIBPART="${ZLIBPART%.*}"
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I="0" |
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FORK_COUNT="0" |
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if [ "${MODE}" = "NORMAL_MODE" ]
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then |
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#--------------# |
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# シリアル処理 # |
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#--------------# |
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while [ "${I}" -lt "${FILESIZE}" ]
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do |
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ZLIBPART_FILE="${ZLIBPART}_${I}.bin"
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cat ${1} | dd bs=1 skip=${I} | openssl zlib -d > ${ZLIBPART_FILE} 2>/dev/null
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if [ -s ${ZLIBPART_FILE} ]
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then |
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file ${ZLIBPART_FILE}
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else |
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rm -f ${ZLIBPART_FILE}
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fi |
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echo -ne "checking.. "`printf "%d/%d" "${I}" "${FILESIZE}"`" \r"
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I=$(( I + 1 )) |
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done |
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else |
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#----------# |
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# 並列処理 # |
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#----------# |
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while [ "${I}" -lt "${FILESIZE}" ]
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do |
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ZLIBPART_FILE="${ZLIBPART}_${I}.bin"
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( 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 )&
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# 並列実行時のサブシェルが増大していくのを抑止 |
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# 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 ) |
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if [ $(( I % 25 )) -eq "0" ] ; then FORK_COUNT=`ps -u |fgrep -c ${0}` ; fi
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while [ "${FORK_COUNT}" -gt "35" ]
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do |
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printf "[WARNING] SubProcess Exceed Limit. fork:%s offset:%s\n" ${FORK_COUNT} ${I}
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FORK_COUNT=`ps -u |fgrep -c ${0}`
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done |
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echo -ne "checking.. "`printf "%d/%d" "${I}" "${FILESIZE}"`" \r"
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I=$(( I + 1 )) |
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done |
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fi |
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exit 0 |
