1 #! @PERL@
3 use lib qw( @prefix@/lib/perl );
5 use RRDs;
6 my $start=time;
7 my $rrd="randome.rrd";
8 my $name = $0;
9 $name =~ s/\.pl.*//g;
11 RRDs::create ($rrd, "--start",$start-1, "--step",300,
12 "DS:a:GAUGE:600:U:U",
13 "RRA:AVERAGE:0.5:1:300",
14 "RRA:MIN:0.5:12:300",
15 "RRA:MAX:0.5:12:300",
16 );
17 my $ERROR = RRDs::error;
18 die "$0: unable to create `$rrd': $ERROR\n" if $ERROR;
20 # dropt some data into the rrd
21 my $t;
22 for ($t=$start; $t<$start+300*300; $t+=300){
23 RRDs::update $rrd, "$t:".(sin($t/3000)*50+50);
24 if ($ERROR = RRDs::error) {
25 die "$0: unable to update `$rrd': $ERROR\n";
26 }
27 }
29 RRDs::graph "$name.png",
30 "--title", uc($name)." Demo",
31 "--start", "now",
32 "--end", "start+1d",
33 "--lower-limit=0",
34 "--interlace",
35 "--imgformat","PNG",
36 "--width=450",
37 "DEF:a=$rrd:a:AVERAGE",
38 "DEF:b=$rrd:a:MIN",
39 "DEF:c=$rrd:a:MAX",
40 "AREA:a#00b6e4:real",
41 "LINE1:b#0022e9:min",
42 "LINE1:c#00ee22:max",
43 ;
45 if ($ERROR = RRDs::error) {
46 print "ERROR: $ERROR\n";
47 };
50 print "This script has created $name.png in the current directory\n";
51 print "This demonstrates the use of the TIME and % RPN operators\n";