use config files
[upsgraph] / upsgraph.pl
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1#!/usr/bin/perl -w
2
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3if ((@ARGV != 1) && (@ARGV != 2)) {
4 print STDERR "Syntax: ${0} configfile [uid]\n";
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5 exit(1);
6}
7
1c9fb9df 8use Net::SNMP;
e18c93b3 9
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10$UPSGRAPH::host = "";
11$UPSGRAPH::rrdfile = "";
12$UPSGRAPH::outdir = "";
13$UPSGRAPH::community = "public";
14$UPSGRAPH::step = 60;
15@UPSGRAPH::fields = ();
16$UPSGRAPH::vars = {};
e18c93b3 17
1c9fb9df 18do $ARGV[0] or die "can't read config: $!";
e18c93b3 19
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20my $host = $UPSGRAPH::host;
21my $rrdfile = $UPSGRAPH::rrdfile;
22my $outdir = $UPSGRAPH::outdir;
23my $community = $UPSGRAPH::community;
24my $step = $UPSGRAPH::step;
25my @fields = @UPSGRAPH::fields;
26my $vars = $UPSGRAPH::vars;
e18c93b3 27
af4abf85 28if ($> == 0) {
1c9fb9df 29 if (@ARGV != 2) {
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30 print STDERR "Running as root, please provide UID as 4th argument!\n";
31 exit(1);
32 }
33
34 print "Running as root, switching to ".$ARGV[3]."\n";
1c9fb9df 35 $< = $> = $ARGV[1];
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36}
37
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38if (! -e "${rrdfile}") {
39 my $cmd = "rrdtool create \"${rrdfile}\" ";
40 foreach my $var (@fields) {
41 $cmd .= "DS:${var}:GAUGE:600:" .
42 $vars->{$var}->{'min'} . ":" .
43 $vars->{$var}->{'max'} . " ";
44 }
45 $cmd .= "RRA:AVERAGE:0.5:1:10080 --step ${step}";
46
47 print "Creating ${rrdfile}...\n";
48 print `${cmd}`;
49}
50
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51my $child = fork();
52
53die "fork failed!" if (!defined($child));
54
55exit 0 if ($child != 0);
56
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57while(1) {
58 ($session,$error) = Net::SNMP->session(Hostname => $host,
59 Community => $community);
60
61 die "session error: $error" unless ($session);
62
63 $session->translate(0);
64
65 foreach my $var (@fields) {
66 delete $vars->{$var}->{'value'};
67
68 my $result = $session->get_request($vars->{$var}->{'oid'});
69 next unless (defined $result);
70
71 $vars->{$var}->{'value'} = $result->{$vars->{$var}->{'oid'}};
72 if (defined($vars->{$var}->{'factor'})) {
73 $vars->{$var}->{'value'} *= $vars->{$var}->{'factor'};
74 }
75 }
76
77 $session->close;
78
79 my $cmd = "rrdtool update \"${rrdfile}\" \"N";
80 foreach my $var (@fields) {
81 if (!(defined($vars->{$var}->{'value'}))) {
82 $vars->{$var}->{'value'} = 'U';
83 }
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84 $cmd .= ":" . $vars->{$var}->{'value'};
85 }
86 $cmd .= "\"";
87 print `${cmd}`;
88
89 open(HTML, ">${outdir}/index.html.new");
90
91 print HTML '<html><head><meta http-equiv="refresh" content="60"/><meta http-equiv="cache-control" content="no-cache"/><meta http-equiv="pragma" content="no-cache"/><meta http_equiv="expires" content="Sat, 26 Jul 1997 05:00:00 GMT"/><title>USV status</title></head>';
92 print HTML '<body bgcolor="#ffffff">';
93
94 foreach my $var (@fields) {
95 my $graphdef = "-t \"" . $vars->{$var}->{'name'} . "\" \"DEF:${var}=${rrdfile}:${var}:AVERAGE\" \"LINE1:${var}#FF0000\"";
96 my $cmd = "rrdtool graph \"${outdir}/${var}.png.new\" -w 720 ${graphdef}";
97 my $size = `$cmd`;
98 rename("${outdir}/${var}.png.new", "${outdir}/${var}.png");
99 (my $width, my $height) = split(/x/,$size);
100
101 my $cmd2 = "rrdtool graph \"${outdir}/${var}.long.png.new\" -w 1008 -e now -s end-1w ${graphdef}";
102 my $size2 = `$cmd2`;
103 rename("${outdir}/${var}.long.png.new", "${outdir}/${var}.long.png");
104
105 print HTML "<a href=\"${var}.long.png\"><img src=\"${var}.png\" width=\"${width}\" height=\"${height}\" border=\"0\"></a>";
106 }
107
108 print HTML "</body></html>\n";
109 print HTML "<br>Generated on: " . localtime(time());
863e62dc 110 print HTML ' by <a href="http://git.zerfleddert.de/cgi-bin/gitweb.cgi/upsgraph">upsgraph</a>.';
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111
112 close(HTML);
113
114 rename("${outdir}/index.html.new", "${outdir}/index.html");
115
116 sleep(${step}/2);
117}
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