[1] [CITE[perlvar - search.cpan.org]]
([TIME[2015-02-26 19:34:25 +09:00]] 版)
<http://search.cpan.org/dist/perl/pod/perlvar.pod#Error_Variables>

[2] [CITE[perlvar - search.cpan.org]]
([TIME[2015-02-26 19:34:25 +09:00]] 版)
<http://search.cpan.org/dist/perl/pod/perlvar.pod#$?>