This is Perl module Sub::Retry. INSTALLATION Sub::Retry installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan Sub::Retry Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install DOCUMENTATION Sub::Retry documentation is available as in POD. So you can do: % perldoc Sub::Retry