http://d.hatena.ne.jp/MKMK/20100118 http://zetcode.com/lang/rubytutorial/io/ http://hibariya.github.io/entries/20120326/a0.html http://qiita.com/ogomr/items/27e9fc7af5b978b5ced6 http://www.fireproject.jp/feature/c-language/process/fork-wai…

http://www.masudak.net/blog/2013/05/30/201305302308/ http://blog.0xc.info/2012/09/processspawnpid.html