Net::EmptyPort man page on Alpinelinux

Net::EmptyPort man page on Alpinelinux

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Net::EmptyPort(3)     User Contributed Perl Documentation    Net::EmptyPort(3)

NAME
       Net::EmptyPort - find a free TCP/UDP port

SYNOPSIS
	   use Net::EmptyPort qw(empty_port check_port);

	   # get a random free port
	   my $port = empty_port();

	   # check if a port is already used
	   if (check_port(5000)) {
	       say "Port 5000 already in use";
	   }

DESCRIPTION
       Net::EmptyPort helps finding an empty TCP/UDP port.

METHODS
       "empty_port()"
	       my $port = empty_port();

	   Get the available port number, you can use.

	   Normally, empty_port() finds empty port number from 49152..65535.
	   See <http://www.iana.org/assignments/port-numbers>

	   But you want to use another range, use a following form:

	       # 5963..65535
	       my $port = empty_port(5963);

	   You can also find an empty UDP port by specifying the protocol as
	   the second parameter:

	       my $port = empty_port(1024, 'udp');
	       # use 49152..65535 range
	       my $port = empty_port(undef, 'udp');

       "check_port($port:Int)"
	       my $true_or_false = check_port(5000);

	   Checks if the given port is already in use. Returns true if it is
	   in use (i.e. if the port is NOT free). Returns false if the port is
	   free.

	   Also works for UDP:

	       my $true_or_false = check_port(5000, 'udp');

       "wait_port($port:Int[, $max_wait:Number,$proto:String])"
	   Waits for a particular port is available for connect.

	   This method waits the $port number is ready to accept a request.

	   $port is a port number to check.

	   Sleep up to $max_wait seconds for checking the port.

	   Return value : Return true if the port is available, false
	   otherwise.

	   Incompatible changes: Before 2.0, "wait_port($port:Int[,
	   $sleep:Number, $retry:Int, $proto:String])" is a signature.

AUTHOR
       Tokuhiro Matsuno <tokuhirom@gmail.com>

THANKS TO
       kazuhooku

       dragon3

       charsbar

       Tatsuhiko Miyagawa

       lestrrat

SEE ALSO
LICENSE
       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

perl v5.18.2			  2014-05-14		     Net::EmptyPort(3)

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