#!/usr/bin/perl
#


use strict;
use POSIX ":sys_wait_h";

my $minus = shift;
my $plus = 1;
my $status = 0;

if ($minus eq '-') {
  $plus = 0;
}
elsif ($minus eq "-s") {
  $status = 1;
}

if ($status) {
  my($vol, $jack) = &getstate;
  if ($vol =~ /(\d+?):/) {
    print "Vol: $1% $jack\n";
    
  }
    exit;
}
else {
  if($plus) {
    system("mixer vol +5:+5");
  }
  else {
    system("mixer vol -5:-5");
  }
}


1;

sub getstate {
  my $vol = `mixer vol`;
  chomp $vol;
  $vol =~ s/Mixer vol\s*//;

  my $jack = `sysctl hw.snd.default_unit`;
  chomp $jack;
  if ($jack =~ /1/) {
    $jack = "Jack: off";
  }
  else {
    $jack = "Jack: on";
  }
  return($vol, $jack);
}