#!/usr/bin/perl
use CGI::Carp qw(fatalsToBrowser);
use CGI::Request;
use Date::Calc qw(Add_Delta_Days); # http://www.engelschall.com/u/sb/download/Date-Calc/
my $req = new CGI::Request;
my $TBOX = lc($req->param('tbox'));
my $AUTOSCALE = lc($req->param('autoscale'));
my $DAYS = lc($req->param('days'));
my $DATAFILE = "db/$TBOX";
sub make_machine_list {
my @result;
chdir "db";
while(<*>) {
if( $_ ne 'config.txt' ) {
push @result, $_;
}
}
chdir "..";
return @result;
}
# no tbox, print out a list of machines in db directory, with links.
sub print_machines {
# HTTP header
print "Content-type: text/html\n\n\n";
print "
Startup times:
";
print "
";
print "
Select one of the following machines:
";
print "
\n";
print "
\n";
my @machines = make_machine_list();
my $machines_string = join(" ", @machines);
foreach (@machines) {
print "
";
}
sub show_graph {
die "$TBOX: no data file found"
unless -e $DATAFILE;
my $PNGFILE = "/tmp/gnuplot.$$";
# Find gnuplot, sorry this is for solaris.
my $gnuplot;
if(-f "/usr/bin/gnuplot") {
$gnuplot = "/usr/bin/gnuplot";
} elsif(-f "/usr/local/bin/gnuplot") {
$gnuplot = "/usr/local/bin/gnuplot";
$ENV{LD_LIBRARY_PATH} .= "/usr/local/lib";
} else {
die "Can't find gnuplot.";
}
# Set scaling for x-axis (time)
my $xscale;
my $today;
my $n_days_ago;
# Get current time, $today.
my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdat) = localtime();
$year += 1900;
$mon += 1;
$today = sprintf "%04d:%02d:%02d:%02d:%02d:%02d", $year, $mon, $mday, $hour, $min, $sec;
# Calculate date $DAYS before $today.
my ($year2, $mon2, $mday2) = Add_Delta_Days($year, $mon, $mday, -$DAYS);
$n_days_ago= sprintf "%04d:%02d:%02d:%02d:%02d:%02d", $year2, $mon2, $mday2, $hour, $min, $sec;
if($DAYS) {
# Assume we want to see 7 days on the graph, so we set the max value also.
$xscale = "set xrange [\"$n_days_ago\" : \"$today\"]";
} else {
$xscale = "";
}
# Set scaling for y-axis.
my $yscale;
if($AUTOSCALE) {
$yscale = "";
} else {
$yscale = "set yrange [ 0 : ]";
}
# interpolate params into gnuplot command
my $cmds = qq{
reset
set term png color
set output "$PNGFILE"
set title "$TBOX Startup Times"
set key graph 0.1,0.95 reverse spacing .75 width -18
set linestyle 1 lt 1 lw 1 pt 7 ps 0
set linestyle 2 lt 1 lw 1 pt 7 ps 1
set data style points
set timefmt "%Y:%m:%d:%H:%M:%S"
set xdata time
$xscale
$yscale
set ylabel "Startup time (ms)"
set timestamp "Generated: %d/%b/%y %H:%M" 0,0
set format x "%h %d"
set grid
plot "$DATAFILE" using 1:2 with points ls 1, "$DATAFILE" using 1:2 with lines ls 2
};
# Set up command string for gnuplot
open (GNUPLOT, "| $gnuplot") || die "can't fork: $!";
print GNUPLOT $cmds;
close (GNUPLOT) || die "Empty data set? Gnuplot failed to set up the plot command string : $!";
# Actually do the gnuplot command.
open (GNUPLOT, "< $PNGFILE") || die "can't read: $!";
{ local $/; $blob = ; }
close (GNUPLOT) || die "can't close: $!";
unlink $PNGFILE || die "can't unlink $PNGFILE: $!";
print "Content-type: image/png\n\n";
print $blob;
}
# main
{
unless ($TBOX) {
print_machines();
} else {
show_graph();
}
}
exit 0;