FAQ 8.31 Can I use perl to run a telnet or ftp session?


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PerlFAQ Server

This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

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8.31: Can I use perl to run a telnet or ftp session?

Try the "Net::FTP", "TCP::Client", and "Net::Telnet" modules (available
from CPAN). http://www.cpan.org/scripts/netstuff/telnet.emul.shar will
also help for emulating the telnet protocol, but "Net::Telnet" is quite
probably easier to use.

If all you want to do is pretend to be telnet but don't need the initial
telnet handshaking, then the standard dual-process approach will
suffice:

use IO::Socket; # new in 5.004
$handle = IO::Socket::INET->new('www.perl.com:80')
or die "can't connect to port 80 on www.perl.com: $!";
$handle->autoflush(1);
if (fork()) { # XXX: undef means failure
select($handle);
print while <STDIN>; # everything from stdin to socket
} else {
print while <$handle>; # everything from socket to stdout
}
close $handle;
exit;



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