#! /usr/bin/perl -w
#
# (c) 2009-2011 Technische Universität Dresden
# This file is part of TUD:OS and distributed under the terms of the
# GNU General Public License 2.
# Please see the COPYING-GPL-2 file for details.
#
# Adam Lackorzynski <adam@os.inf.tu-dresden.de>
#
# Do not use 'perl -W' here, as with perl-5.20 we'll get
# Use of uninitialized value in string ne at /usr/lib/..../perl/5.20/File/Spec/Unix.pm line 92.
# Maybe sometime later we could use -W again?

use strict;
use File::Temp qw/tempfile/;

BEGIN { unshift @INC, $ENV{L4DIR}.'/tool/lib'
           if $ENV{L4DIR} && -d $ENV{L4DIR}.'/tool/lib/L4';}

use L4::ModList;

unless (defined $ARGV[1]) {
  print "ERROR: Need to give command and modules file!\n";
  exit 1;
}

my @e = L4::ModList::get_entries($ARGV[1]);

if ($ARGV[0] eq 'menu')
  {
    my ($tmpfd, $tmpfilename) = tempfile();

    my $backtitle = '';
    if (defined $ENV{BACKTITLE})
      {
        $backtitle = $ENV{BACKTITLE};
        $backtitle =~ s/"/\\"/g;
        $backtitle = "--backtitle \"$backtitle\"";
      }

    system("dialog $backtitle --title 'Entry selection' "
        ." --menu 'Select entry to launch' 18 65 18 ".
        join(' ', map { "$_ '$e[$_]'" } (0 .. $#e) )." 2> $tmpfilename");

    if ($?)
      {
        print "ERROR: dialog aborted!\n";
        exit 1;
      }

    my $o;
    read $tmpfd, $o, 100;
    close $tmpfd;
    unlink $tmpfilename;

    chomp $o;

    if ($o !~ /^\d+$/)
      {
        print "ERROR: Invalid return value from dialog!\n";
        exit 1;
      }

    print STDERR $e[$o];
    exit 0;
  }
elsif ($ARGV[0] eq 'list')
  {
    print join("\n ", "Entries in modules file:", @e), "\n";
  }