特に説明する部分でもないですが、cron等の繰り返し設定で２重に起動しないようにするbashです。該当シェルスクリプトの先頭に追加しておくと便利
# 二重起動防止
_process=`basename $0`
_pcnt=`pgrep -fo ${_process} | wc -l`
if [ ${_pcnt} -gt 1 ]; then
echo "This script has been running now. proc : ${_pcnt}"
exit 1
fi
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