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dpavlin |
1.1 |
#!/usr/bin/perl -w |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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use POSIX; |
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use RRDs; |
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use strict; |
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# |
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# Basic setup |
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# |
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my $iface = 'wlan0'; # wireless interface |
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my $step = 10; # sec |
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my $next1_factor = 60; # $step * $next1_factor = 10*60 = 600 sec = 10 min |
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my $next2_factor = 360; # $step * $next2_factor = 10*360 = 3600 sec = 1 hour |
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my $update_graph_period = 10; # How often will be graph updated (1..1000) |
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# |
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# Setup files locations |
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# |
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my $wifi_proc_file='/proc/net/wireless'; |
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my $dev_proc_file='/proc/net/dev'; |
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my $rrd='./istatd.rrd'; |
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my $signal_image='signal.png'; |
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my $transfer_image='transfer.png'; |
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my $pid_file='./istatd.pid'; |
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# |
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# End setup |
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# |
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############################################################ |
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my $start=time; |
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my $syncrorun; |
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my $switcher=$ARGV[0]; |
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if (!($switcher)) { $switcher='undef'; } |
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if ($switcher eq 'start') { |
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&start(); |
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} |
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elsif ($switcher eq 'stop') { |
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&stop(); |
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} |
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elsif ($switcher eq 'graph') { |
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&update_graph(); |
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} |
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elsif ($switcher eq 'install') { |
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&install(); |
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} |
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else { |
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print qq(Usage: ./istatd.pl option |
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option: start - Starting daemon |
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stop - Stopping daemon |
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graph - Get the latest graph |
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install - Init database |
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); |
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} |
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############################################################### |
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sub install { |
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my $sec_in_the_day=86400; |
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my $sec_in_the_week=$sec_in_the_day*7; |
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my $sec_in_the_month=$sec_in_the_day*31; |
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my $minvalue=0; |
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my $maxvalue=255; |
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my $xfiles_factor=0.5; |
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my $max_interval=$step/$xfiles_factor; |
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my $number_steps_day=floor($sec_in_the_day/$step); |
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my $number_steps_week=floor($sec_in_the_week/($step*$next1_factor)); |
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my $number_steps_month=floor($sec_in_the_month/($step*$next2_factor)); |
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RRDs::create ($rrd, "--start",$start-1, "--step",$step, |
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"DS:link:GAUGE:$max_interval:$minvalue:$maxvalue", |
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"DS:level:GAUGE:$max_interval:$minvalue:$maxvalue", |
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"DS:noise:GAUGE:$max_interval:$minvalue:$maxvalue", |
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"DS:in:COUNTER:$max_interval:0:U", |
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"DS:out:COUNTER:$max_interval:0:U", |
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"RRA:AVERAGE:$xfiles_factor:1:$number_steps_day", |
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"RRA:AVERAGE:$xfiles_factor:$next1_factor:$number_steps_week", |
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"RRA:AVERAGE:$xfiles_factor:$next2_factor:$number_steps_month"); |
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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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print "Done.\n"; |
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} |
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############################################################### |
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sub start { |
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my $pid=fork; |
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exit if $pid; |
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die "Could't fork: $!" unless defined($pid); |
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POSIX::setsid() or die "Can't start a new session: $!"; |
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$SIG{INT}=$SIG{TERM}=$SIG{HUP}=\&syncro_handler; |
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$syncrorun=1; |
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my $pid_id=$$; |
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open(FILE, ">>$pid_file") || die "Cant write to $pid_file file: $!"; |
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print FILE $pid_id; |
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close(FILE); |
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my $counter=0; |
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while ($syncrorun) { |
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$counter++; |
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if (!( -e $pid_file)) { $syncrorun=0; } |
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&get_data(); |
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if ($counter == $update_graph_period) { |
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&update_graph(); |
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$counter=0; |
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} |
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sleep($step); |
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} |
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} |
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############################################################## |
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sub stop { |
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my $pid=`cat $pid_file`; |
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`kill $pid`; |
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} |
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############################################################## |
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sub update_graph { |
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RRDs::graph "$signal_image", |
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"--title", " $iface signal statistics", |
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"--start", "now-12h", |
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"--end", "now", |
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"--lower-limit=0", |
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"--interlace", |
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"--imgformat","PNG", |
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"--width=450", |
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"DEF:link=$rrd:link:AVERAGE", |
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# "DEF:level=$rrd:level:AVERAGE", |
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# "DEF:noise=$rrd:noise:AVERAGE", |
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"AREA:link#00b6e4:link", |
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# "LINE1:level#0022e9:level", |
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# "LINE1:noise#cc0000:noise" |
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; |
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print "ERROR ".RRDs::error."\n" if (RRDs::error); |
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RRDs::graph "$transfer_image", |
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"--title", " $iface transfer statistics", |
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"--start", "now-12h", |
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"--end", "now", |
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"--lower-limit=0", |
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"--interlace", |
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"--imgformat","PNG", |
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"--width=450", |
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"DEF:in=$rrd:in:AVERAGE", |
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"DEF:out=$rrd:out:AVERAGE", |
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"AREA:in#00b6e4:in", |
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"LINE1:out#0022e9:out", |
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; |
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print "ERROR ".RRDs::error."\n" if (RRDs::error); |
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} |
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############################################################### |
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sub get_data { |
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my ($link,$level,$noise,$in,$out) = ("U","U","U","U","U"); |
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open(FILE, "$wifi_proc_file") || die "Cant open $wifi_proc_file file: $!"; |
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while (my $line=<FILE>) { |
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($link,$level,$noise) = ($1,$2,$3) if ($line=~/\s*?$iface\:\s+?\d+?\s+?(\d+)\.*?\d*?\s+?(\d+)\.*?\d*?\s+?(\d+)\.*?\d*?.*/); |
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} |
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close(FILE); |
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open(FILE, "$dev_proc_file") || die "Cant open $dev_proc_file file: $!"; |
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while (my $line=<FILE>) { |
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if ($line=~/\s*?$iface\:\s*?(\d+.*)$/) { |
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my @v = split(/\s+/,$1,16); |
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($in,$out) = ($v[0],$v[8]); |
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} |
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} |
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close(FILE); |
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RRDs::update ("$rrd", "--template", "link:level:noise:in:out", "N:$link:$level:$noise:$in:$out"); |
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print "ERROR ".RRDs::error."\n" if (RRDs::error); |
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} |
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############################################################### |
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sub syncro_handler { |
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unlink($pid_file) || die "Cant unlink $pid_file file: $!"; |
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$syncrorun=0; |
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} |
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