>>296-297
http://perldoc.com/perl5.8.4/pod/func/system.html
http://www.jp.freebsd.org/cgi/mroff.cgi?subdir=man&lc=1&cmd=&man=tar&dir=jpman-4.7.0%2Fman§=1
http://www.kt.rim.or.jp/%7Ekbk/perl5.005/perlfaq8.html#How_can_I_capture_STDERR_from_an