51 lines
1.2 KiB
Raku
Executable File
51 lines
1.2 KiB
Raku
Executable File
#! /usr/bin/perl
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# this is for after install
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use lib qw( /usr/lib/perl );
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use RRDs;
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my $start=time;
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my $rrd="randome.rrd";
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my $name = $0;
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$name =~ s/.*\///g;
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$name =~ s/\.pl.*//g;
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RRDs::create ($rrd, "--start",$start-1, "--step",300,
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"DS:a:GAUGE:600:U:U",
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"DS:b:GAUGE:600:U:U",
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"RRA:AVERAGE:0.5:1:300");
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my $ERROR = RRDs::error;
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die "$0: unable to create `$rrd': $ERROR\n" if $ERROR;
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# dropt some data into the rrd
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my $t;
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for ($t=$start; $t<$start+300*300; $t+=300){
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RRDs::update $rrd, "$t:".rand(100).":".(sin($t/800)*50+50);
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if ($ERROR = RRDs::error) {
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die "$0: unable to update `$rrd': $ERROR\n";
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}
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}
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RRDs::graph "$name.png",
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"--title", uc($name)." Demo",
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"--start", "$start + 1 h",
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"--end", "start + 1000 min",
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"--interlaced",
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"--imgformat","PNG",
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"--width=450",
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"DEF:a=$rrd:a:AVERAGE",
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"DEF:b=$rrd:b:AVERAGE",
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"CDEF:line=TIME,2400,%,300,LT,a,UNKN,IF",
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"AREA:b#00b6e4:beta",
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"AREA:line#0022e9:alpha",
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"LINE3:line#ff0000",
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;
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if ($ERROR = RRDs::error) {
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die "ERROR: $ERROR\n";
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};
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print "This script has created $name.png in the current directory\n";
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print "This demonstrates the use of the TIME and % RPN operators\n";
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