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# Author: John Southworth <john.southworth@vyatta.com>
# Date: 2012
# Description: vyatta ioctl functions
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2008 Vyatta, Inc.
# All Rights Reserved.
# **** End License ****
package Vyatta::ioctl;
use strict;
use warnings;
use Socket;
use Socket6;
{
local $^W = 0;
require 'sys/ioctl.ph';
}
our @EXPORT = qw(get_terminal_size get_interface_flags);
use base qw(Exporter);
# returns (rows, columns) for terminal size;
sub get_terminal_size {
# undefined if not terminal attached
open(my $TTY, '>', '/dev/tty')
or return;
my $winsize = '';
# undefined if output not going to terminal
return unless (ioctl($TTY, &TIOCGWINSZ, $winsize));
close($TTY);
my ($rows, $cols, undef, undef) = unpack('S4', $winsize);
return ($rows, $cols);
}
#Do SIOCGIFFLAGS ioctl in perl
sub get_interface_flags {
my $name = shift;
socket (my $sock, AF_INET, SOCK_DGRAM, 0)
or die "open UDP socket failed: $!";
my $ifreq = pack('a16', $name);
ioctl($sock, &SIOCGIFFLAGS, $ifreq)
or return; #undef
my (undef, $flags) = unpack('a16s', $ifreq);
return $flags;
}
1;
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