1 #! @PERL@
2 # this is for after install
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/.*\///g;
10 $name =~ s/\.pl.*//g;
12 RRDs::create ($rrd, "--start",$start-1, "--step",300,
13 "DS:a:GAUGE:600:U:U",
14 "DS:b:GAUGE:600:U:U",
15 "RRA:AVERAGE:0.5:1:300");
16 my $ERROR = RRDs::error;
17 die "$0: unable to create `$rrd': $ERROR\n" if $ERROR;
19 # dropt some data into the rrd
20 my $t;
21 for ($t=$start; $t<$start+300*300; $t+=300){
22 RRDs::update $rrd, "$t:".rand(100).":".(sin($t/800)*50+50);
23 if ($ERROR = RRDs::error) {
24 die "$0: unable to update `$rrd': $ERROR\n";
25 }
26 }
28 RRDs::graph "$name.png",
29 "--title", uc($name)." Demo",
30 "--start", "$start + 1 h",
31 "--end", "start + 1000 min",
32 "--interlace",
33 "--imgformat","PNG",
34 "--width=450",
35 "DEF:a=$rrd:a:AVERAGE",
36 "DEF:b=$rrd:b:AVERAGE",
37 "CDEF:line=TIME,2400,%,300,LT,a,UNKN,IF",
38 "AREA:b#00b6e4:beta",
39 "AREA:line#0022e9:alpha",
40 "LINE3:line#ff0000",
42 ;
44 if ($ERROR = RRDs::error) {
45 die "ERROR: $ERROR\n";
46 };
49 print "This script has created $name.png in the current directory\n";
50 print "This demonstrates the use of the TIME and % RPN operators\n";