#!/usr/bin/perl -w
# $Id: telnet_wrapper 832 2016-12-28 09:49:47Z mueller $
#
# Copyright 2009-2013 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
#
# This program is free software; you may redistribute and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 2, or at your option any later version.
#
# 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 complete details.
#
#  Revision History:
# Date         Rev  Vers    Comment
# 2009-11-07   246   1.0    Initial version
#

use 5.14.0;                                 # require Perl 5.14 or higher
use strict;                                 # require strict checking

if (scalar(@ARGV) != 2) {
  print STDERR "usage: telnet_wrapper host port\n";
  exit 1;
}

my $host = $ARGV[0];
my $port = $ARGV[1];

print "$host $port\n";

my $telnet = `which telnet`;
chomp $telnet;

while(1) {
  my $rc = system $telnet, $host, $port;
  if ($rc != 0) {
    print STDERR "telnet failed with rc=$rc\n";
  }
  print "enter q or <^D> to quit, otherwise hit <ENTER> to reconnect: ";
  my $buf;
  my $nc = read STDIN, $buf, 1;
  if (not defined $nc) {
    print "\n";
    exit 1;
  }
  if ($nc == 0) {
    print "\n";
    exit 0;
  }
  if ($buf eq "q") {
    exit 0;
  }
}