This is Perl module POSIX::pselect. INSTALLATION Install cpanm (App::cpanminus) and then run the following command to install POSIX::pselect: $ cpanm POSIX::pselect If you get an archive of this distribution, unpack it and build it as per the usual: $ tar xzf POSIX-pselect-$version.tar.gz $ cd POSIX-pselect-$version $ perl Makefile.PL $ make && make test Then install it: $ make install DOCUMENTATION POSIX::pselect documentation is available as in POD. So you can do: $ perldoc POSIX::pselect to read the documentation online with your favorite pager. LICENSE AND COPYRIGHT Copyright (c) 2011, Fuji, Goro (gfx). All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.