Re: [MonAMI-users] unable to see some graphs

[Arnau B. <arn...@pi...>]

Hi all,

> arnau@lx-arnau ~ $ hexdump -C torque-graph.png | head -20
> 00000000  0a 89 50 4e 47 0d 0a 1a  0a 00 00 00 0d 49 48 44
> |..PNG........IHD| 00000010  52 00 00 01 8d 00 00 00  ac 08 06 00 00
> 00 87 20  |R.............. | 00000020  f0 f6 00 00 00 4a 74 45  58 74
> 53 6f 66 74 77 61  |.....JtEXtSoftwa| 00000030  72 65 00 52 52 44 74
> 6f  6f 6c 2c 20 54 6f 62 69  |re.RRDtool, Tobi| 00000040  61 73 20 4f
> 65 74 69 6b  65 72 20 3c 74 6f 62 69  |as Oetiker <tobi|
> 
> good one (generated with rrdtool)
> 
> arnau@lx-arnau ~ $ hexdump -C rrdoutput | head -20
> 00000000  89 50 4e 47 0d 0a 1a 0a  00 00 00 0d 49 48 44 52
> |.PNG........IHDR| 00000010  00 00 02 b9 00 00 00 e9  08 06 00 00 00
> 20 4f 2f  |............. O/| 00000020  6a 00 00 00 4a 74 45 58  74 53
> 6f 66 74 77 61 72  |j...JtEXtSoftwar| 00000030  65 00 52 52 44 74 6f
> 6f  6c 2c 20 54 6f 62 69 61  |e.RRDtool, Tobia| 00000040  73 20 4f 65
> 74 69 6b 65  72 20 3c 74 6f 62 69 40  |s Oetiker <tobi@|
> 
> 
> notice that bad  one starts with ..PNG and the good one with .PNG (0a
> 89 50 vs 89 50)
> 
> I've opened it with mc and saw some blank line at the beggining of the
> file. After removing it, the png is displayed again.
> 
> What could be insertering that blank line?

in multiple-graphs.php

function mg_pref_order_cmp($a, $b) {
    if ($a == $b) return 0;
    global $mg_preferred_order;
    static $pref_values;
    if (!$pref_values) $pref_values = array_values($mg_preferred_order);
    $x = array_search($a, $pref_values);
    $y = array_search($b, $pref_values);

    $found_x = ($x !== FALSE) && ($x !== NULL);
    $found_y = ($y !== FALSE) && ($y !== NULL);

    if( $found_x && $found_y)
      return ($x < $y ? -1 : 1);

    if( $found_x)
      return -1;

    if( $found_y)
      return 1;

    return $a < $b ? -1 : 1;
  }
return (0);
^^^^^^^^^^^^^

that return (0); does the trick... 

Thanks to all for the help!

Cheers,
Arnau