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root/i-scream/projects/cms/source/reports/rrdgraphing/graph.pl
Revision: 1.13
Committed: Thu Mar 4 11:27:30 2004 UTC (20 years, 9 months ago) by tdb
Content type: text/plain
Branch: MAIN
Changes since 1.12: +33 -20 lines
Log Message:
Latest versions of the rrdgraphing code. Some graphs now use areas, others
use stacks. Added cache memory, and our mail queue graphs.

File Contents

# User Rev Content
1 tdb 1.1 #!/usr/bin/perl -w
2    
3 tdb 1.2 #
4     # i-scream central monitoring system
5 tdb 1.11 # http://www.i-scream.org.uk
6 tdb 1.2 # Copyright (C) 2000-2002 i-scream
7     #
8     # This program is free software; you can redistribute it and/or
9     # modify it under the terms of the GNU General Public License
10     # as published by the Free Software Foundation; either version 2
11     # of the License, or (at your option) any later version.
12     #
13     # This program is distributed in the hope that it will be useful,
14     # but WITHOUT ANY WARRANTY; without even the implied warranty of
15     # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16     # GNU General Public License for more details.
17     #
18     # You should have received a copy of the GNU General Public License
19     # along with this program; if not, write to the Free Software
20     # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21     #
22    
23 tdb 1.1 # -----------------------------------------------------------
24     # i-scream graph generation script
25     # http://www.i-scream.org.uk
26     #
27     # Generates graphs from rrd databases for i-scream data.
28     #
29     # $Author: tdb $
30 tdb 1.13 # $Id: graph.pl,v 1.12 2003/03/10 11:34:43 tdb Exp $
31 tdb 1.1 #------------------------------------------------------------
32    
33     ## TODO
34     # possibly make more configurable?
35     # -- allow configurable periods of graphs
36     # -- comments, types, etc
37 tdb 1.5
38 tdb 1.13 BEGIN {
39     push (@INC, "/usr/local/packages/rrdtool/lib/perl5/site_perl/5.8.2/sun4-solaris");
40     }
41    
42     my($version) = '$Id: graph.pl,v 1.12 2003/03/10 11:34:43 tdb Exp $';
43 tdb 1.1
44     $| = 1;
45 tdb 1.5
46 tdb 1.1 use strict;
47 tdb 1.5 use Getopt::Std;
48 tdb 1.1 use RRDs;
49    
50 tdb 1.5 # define variables that will be read from the config
51     # nb. keep this insync with the config file!
52     use vars qw{
53     $imgdir $rrddir
54     $maxrrdage $maximgage $deleterrds $deleteimgs
55     $hex_slash $hex_underscore
56     $rrdstep $retry_wait
57     $verbose $quiet
58     };
59    
60     # default locate of the config file
61     my($configfile) = "rrdgraphing.conf";
62    
63     # check for command line arguments
64     my(%opts);
65     my($ret) = getopts('hvqVc:', \%opts);
66    
67     # if invalid argument given, $ret will not be 1
68     &usage() if $ret != 1;
69    
70     # first process the arguments which might mean we exit now
71    
72     # -h is usage
73     if($opts{h}) {
74     &usage();
75     }
76     # -V is version
77     if($opts{V}) {
78     print "graph.pl version: $version\n";
79     exit(1);
80     }
81    
82     # Then try getting the config
83    
84     # -c specifies the config file location
85     if($opts{c}) {
86     $configfile = $opts{c};
87     }
88     # suck in the config
89     &log("reading config from $configfile\n");
90     do $configfile;
91    
92     # Then any options we might want to override the config with
93    
94     # -v is verbose
95     if($opts{v}) {
96     $verbose = $opts{v};
97     }
98     # -q is verbose
99     if($opts{q}) {
100     $quiet = $opts{q};
101     # if we're meant to be quiet, we can hardly be verbose!
102     $verbose = 0;
103     }
104    
105 tdb 1.1 # Read the contents of the base directory
106     # and pull out the list of subdirectories (except . and .. :)
107     opendir(DIR, $rrddir);
108 tdb 1.13 my(@rrddirlist) = sort grep { -d "$rrddir/$_" && !/^\.$/ && !/^\.\.$/ } readdir(DIR);
109 tdb 1.1 closedir DIR;
110    
111 tdb 1.13 # look through each directory, as they might
112 tdb 1.1 # contain rrds for a particular machine
113     foreach my $machine (@rrddirlist) {
114     # Read the contents of the directory
115     opendir(DIR, "$rrddir/$machine");
116     my(@rrdlist) = grep { /\.rrd$/ && -f "$rrddir/$machine/$_" } readdir(DIR);
117     closedir DIR;
118    
119     # See what rrd we have, and generate the graphs accordingly
120     foreach my $rrd (@rrdlist) {
121     chomp $rrd;
122 tdb 1.3 # stat the file
123     my($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,
124     $ctime,$blksize,$blocks) = stat("$rrddir/$machine/$rrd");
125     # check if it's old enough to be deleted
126     if((time - $mtime) > $maxrrdage) {
127 tdb 1.4 # do we delete the rrd, or just ignore it?
128     if($deleterrds) {
129     # if so, delete it
130     unlink("$rrddir/$machine/$rrd");
131 tdb 1.5 &log("deleted old rrd $rrddir/$machine/$rrd\n");
132     }
133     else {
134     &log("ignored old rrd $rrddir/$machine/$rrd\n");
135 tdb 1.4 }
136 tdb 1.3 # no more processing required for this rrd
137     next;
138     }
139 tdb 1.1 if($rrd =~ /^(cpu)\.rrd$/) {
140     my(@data);
141     my(@rawdata);
142 tdb 1.13 push @data, "AREA:$1:swap:swap#FF00FF:OK:swap cpu ";
143     push @data, "STACK:$1:iowait:iowait#FF0000:OK:iowait cpu";
144     push @data, "STACK:$1:kernel:kernel#00FFFF:OK:kernel cpu";
145     push @data, "STACK:$1:user:user#0000FF:OK:user cpu ";
146     #push @data, "STACK:$1:idle:idle#00FF00:OK:idle cpu ";
147 tdb 1.1 push @rawdata, "--upper-limit=100";
148 tdb 1.10 &makegraph($machine, $1, "CPU Usage for $machine", "% cpu time", \@data, \@rawdata);
149 tdb 1.1 }
150     if($rrd =~ /^(mem)\.rrd$/) {
151     my(@data);
152     my(@rawdata);
153 tdb 1.11 # we don't actually want to display free or total memory,
154     # although we need it to work out peruse...
155 tdb 1.7 push @data, "NONE:$1:free:free#CCCCFF:NONE:free memory";
156 tdb 1.11 push @data, "NONE:$1:total:total#0000FF:NONE:total memory\\n";
157 tdb 1.13 push @data, "NONE:$1:cache:cache#0000FF:NONE:cache memory\\n";
158 tdb 1.11 # calculate peruse - note that we only use 'free' if it's less than total
159     # (this is to avoid negative percentages :)
160     push @rawdata, "CDEF:peruse=total,free,total,LT,free,0,IF,-,total,/,100,*";
161 tdb 1.13 push @rawdata, "CDEF:percacuse=cache,total,LT,cache,0,IF,total,/,100,*";
162 tdb 1.1 # and add it to the graph
163 tdb 1.11 push @rawdata, "AREA:peruse#CCCCFF:% memory in use";
164 tdb 1.13 &addlegend(\@rawdata, "peruse");
165     push @rawdata, "LINE2:percacuse#0000FF:% memory cache ";
166     &addlegend(\@rawdata, "percacuse");
167 tdb 1.11 push @rawdata, "--upper-limit=100";
168 tdb 1.12 push @rawdata, "--base=1024";
169 tdb 1.11 # put the total memory on the graph so we can map percentages to real values
170 tdb 1.12 push @rawdata, "GPRINT:total:LAST:Current total memory\\: \%.2lf %sb\\c";
171 tdb 1.11 &makegraph($machine, $1, "Memory Usage for $machine", "% memory in use", \@data, \@rawdata);
172 tdb 1.1 }
173     if($rrd =~ /^(load)\.rrd$/) {
174     my(@data);
175 tdb 1.8 push @data, "LINE2:$1:load1:load1#CCCCFF:OK: 1 min load average";
176     push @data, "LINE2:$1:load5:load5#7777FF:OK: 5 min load average";
177     push @data, "LINE2:$1:load15:load15#0000FF:OK:15 min load average";
178 tdb 1.10 &makegraph($machine, $1, "Loads for $machine", "load average", \@data);
179 tdb 1.1 }
180     if($rrd =~ /^(proc)\.rrd$/) {
181     my(@data);
182 tdb 1.13 push @data, "AREA:$1:stopped:stopped#00FFFF:OK:stopped processes ";
183     push @data, "STACK:$1:zombie:zombie#FF0000:OK:zombie processes ";
184     push @data, "STACK:$1:cpu:cpu#00FF00:OK:cpu processes ";
185     push @data, "STACK:$1:sleeping:sleeping#0000FF:OK:sleeping processes";
186     #push @data, "LINE2:$1:total:total#FF00FF:OK:total processes ";
187 tdb 1.10 &makegraph($machine, $1, "Processes on $machine", "no. of processes", \@data);
188 tdb 1.1 }
189     if($rrd =~ /^(swap)\.rrd$/) {
190     my(@data);
191     my(@rawdata);
192 tdb 1.11 # we don't actually want to display free or total swap,
193     # although we need it to work out peruse...
194 tdb 1.7 push @data, "NONE:$1:free:free#CCCCFF:NONE:free swap";
195 tdb 1.11 push @data, "NONE:$1:total:total#0000FF:NONE:total swap\\n";
196     # calculate peruse - note that we only use 'free' if it's less than total
197     # (this is to avoid negative percentages :)
198     push @rawdata, "CDEF:peruse=total,free,total,LT,free,0,IF,-,total,/,100,*";
199 tdb 1.1 # and add it to the graph
200 tdb 1.11 push @rawdata, "AREA:peruse#CCCCFF:% swap in use";
201     push @rawdata, "--upper-limit=100";
202 tdb 1.12 push @rawdata, "--base=1024";
203 tdb 1.7 # add some nice values to the legend
204 tdb 1.11 &addlegend(\@rawdata, "peruse");
205     # put the total swap on the graph so we can map percentages to real values
206 tdb 1.12 push @rawdata, "GPRINT:total:LAST:Current total swap\\: \%.2lf %sb\\c";
207 tdb 1.11 &makegraph($machine, $1, "Swap Usage for $machine", "% swap in use", \@data, \@rawdata);
208 tdb 1.1 }
209     if($rrd =~ /^(users)\.rrd$/) {
210     my(@data);
211 tdb 1.7 push @data, "AREA:$1:count:count#CCCCFF:OK:user count";
212 tdb 1.10 &makegraph($machine, $1, "User Count for $machine", "no. of users", \@data);
213 tdb 1.1 }
214 tdb 1.11 if($rrd =~ /^(paging)\.rrd$/) {
215     my(@data);
216 tdb 1.13 push @data, "AREA:$1:pageins:pageins#00FF00:OK:pages paged in ";
217 tdb 1.12 push @data, "LINE2:$1:pageouts:pageouts#0000FF:OK:pages paged out";
218 tdb 1.11 &makegraph($machine, $1, "Paging on $machine", "pages per second", \@data);
219     }
220 tdb 1.12 if($rrd =~ /^(disk)-(\S+)\.rrd$/) {
221 tdb 1.1 my(@data);
222     my(@rawdata);
223 tdb 1.11 # we need this lot for our calculations, but we'll never show them
224 tdb 1.12 push @data, "NONE:$1-$2:total:total#0000FF:NONE:total size\\n";
225 tdb 1.11 push @data, "NONE:$1-$2:used:used#CCCCFF:NONE:used space";
226     push @data, "NONE:$1-$2:totalinodes:totalinodes#000000:NONE:total inodes";
227     push @data, "NONE:$1-$2:freeinodes:freeinodes#000000:NONE:free inodes";
228     # calculate peruse, add it to the graph, and add a legend
229 tdb 1.12 push @rawdata, "CDEF:peruse=used,total,/,100,*";
230 tdb 1.11 push @rawdata, "AREA:peruse#CCCCFF:% disk used ";
231     &addlegend(\@rawdata, "peruse");
232     # put the total space on the graph so we can map percentages to real values
233 tdb 1.12 push @rawdata, "GPRINT:total:LAST:Current total space\\: \%.2lf %sb\\c";
234 tdb 1.11 # calculate perinodeuse, add it to the graph, and add a legend
235     push @rawdata, "CDEF:perinodeuse=totalinodes,freeinodes,totalinodes,LT,freeinodes,0,IF,-,totalinodes,/,100,*";
236     push @rawdata, "LINE2:perinodeuse#FF4444:% inodes used";
237     push @rawdata, "--upper-limit=100";
238 tdb 1.12 push @rawdata, "--base=1024";
239 tdb 1.11 &addlegend(\@rawdata, "perinodeuse");
240     # put the total inodes on the graph so we can map percentages to real values
241     push @rawdata, "GPRINT:totalinodes:LAST:Current total inodes\\: \%.2lf %s\\c";
242     # some name tidting
243 tdb 1.1 my($type) = $1;
244     my($name) = $2;
245     my($nicename) = $2;
246     $nicename =~ s/$hex_slash/\//g;
247     $nicename =~ s/$hex_underscore/_/g;
248 tdb 1.11 &makegraph($machine, "$type-$name", "Disk Usage for $machine on $nicename", "% usage", \@data, \@rawdata);
249 tdb 1.1 }
250 tdb 1.12 if($rrd =~ /^(diskio)-(\S+)\.rrd$/) {
251     my(@data);
252     my(@rawdata);
253 tdb 1.13 push @data, "AREA:$1-$2:rbytes:rbytes#00FF00:OK:read bytes ";
254 tdb 1.12 push @data, "LINE2:$1-$2:wbytes:wbytes#0000FF:OK:write bytes";
255     push @rawdata, "--base=1024";
256     &makegraph($machine, "$1-$2", "Disk IO for $machine on $2", "bytes per second", \@data, \@rawdata);
257     }
258     if($rrd =~ /^(net)-(\S+)\.rrd$/) {
259     my(@data);
260     my(@rawdata);
261 tdb 1.13 push @data, "AREA:$1-$2:rx:rx#00FF00:OK:received bytes ";
262 tdb 1.12 push @data, "LINE2:$1-$2:tx:tx#0000FF:OK:transfered bytes";
263     push @rawdata, "--base=1024";
264     &makegraph($machine, "$1-$2", "Network IO for $machine on $2", "bytes per second", \@data, \@rawdata);
265     }
266 tdb 1.13 if($rrd =~ /^(mailq)-(\S+)\.rrd$/) {
267     my(@data);
268     my(@rawdata);
269     push @data, "LINE2:$1-$2:size:size#0000FF:OK:messages";
270     &makegraph($machine, "$1-$2", "Mail Queue ($2) Size for $machine", "messages in queue", \@data, \@rawdata);
271     }
272 tdb 1.1 # probably a queue with a name like this :)
273     if($rrd =~ /^(\d+)_0\.rrd$/) {
274     my(@data);
275     my(@rawdata);
276     my($baserrd) = $1;
277     my($i) = 0;
278     while( -f "$rrddir/$machine/$baserrd\_$i.rrd" ) {
279 tdb 1.7 push @data, "LINE2:$baserrd\_$i:size:size$i" . &get_colour($i) . ":OK:queue$i size ";
280 tdb 1.1 ++$i;
281     }
282 tdb 1.9 push @data, "LINE2:$baserrd\_0:total:total#FF0000:OK:packets/sec ";
283 tdb 1.1 my($comment);
284     if(-f "$rrddir/$machine/$baserrd.def") {
285     open(DEF, "$rrddir/$machine/$baserrd.def");
286     $comment = <DEF>;
287     chomp $comment if defined $comment;
288     }
289     $comment = "unknown queue" if not defined $comment;
290 tdb 1.10 &makegraph($machine, $baserrd, $comment, "", \@data, \@rawdata);
291 tdb 1.1 }
292 tdb 1.3 }
293     # have a last check, maybe we can remove the directory now?
294 tdb 1.4 # (only if we're deleting stuff)
295     if($deleterrds) {
296     # Read the contents of the directory
297     opendir(DIR, "$rrddir/$machine");
298     my(@dirlist) = grep { !/^\.$/ && !/^\.\.$/ } readdir(DIR);
299     closedir DIR;
300     if($#dirlist == -1) {
301     rmdir "$rrddir/$machine";
302 tdb 1.5 &log("deleting empty rrd directory $rrddir/$machine\n");
303 tdb 1.4 }
304 tdb 1.3 }
305     }
306    
307 tdb 1.4 if($deleteimgs) {
308     # Read the contents of the graphs directory
309     # and pull out the list of subdirectories (except . and .. :)
310     opendir(DIR, $imgdir);
311 tdb 1.13 my(@imgdirlist) = sort grep { -d "$imgdir/$_" && !/^\.$/ && !/^\.\.$/ } readdir(DIR);
312 tdb 1.3 closedir DIR;
313    
314 tdb 1.4 # look through each directoty, as they might
315     # contain images for a particular machine
316     foreach my $machine (@imgdirlist) {
317     # Read the contents of the directory
318     opendir(DIR, "$imgdir/$machine");
319     my(@imglist) = grep { /\.png$/ && -f "$imgdir/$machine/$_" } readdir(DIR);
320     closedir DIR;
321    
322     # See what rrd we have, and generate the graphs accordingly
323     foreach my $img (@imglist) {
324     chomp $img;
325     # stat the img
326     my($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,
327     $ctime,$blksize,$blocks) = stat("$imgdir/$machine/$img");
328     # check if it's old enough to be deleted
329     if((time - $mtime) > $maximgage) {
330     # if so, delete it
331     unlink("$imgdir/$machine/$img");
332 tdb 1.5 &log("deleted old image $imgdir/$machine/$img\n");
333 tdb 1.4 }
334     }
335     # have a last check, maybe we can remove the directory now?
336     # Read the contents of the directory
337     opendir(DIR, "$imgdir/$machine");
338     my(@dirlist) = grep { !/^\.$/ && !/^\.\.$/ } readdir(DIR);
339     closedir DIR;
340     if($#dirlist == -1) {
341     rmdir "$imgdir/$machine";
342 tdb 1.5 &log("deleted empty image directory $imgdir/$machine\n");
343 tdb 1.3 }
344     }
345 tdb 1.1 }
346 tdb 1.4
347     exit(0);
348    
349 tdb 1.1
350     #
351     # subroutine to make some graphs
352     #
353     # $machine = name of the machine
354     # (eg. kernow.ukc.ac.uk)
355     # $type = the type of graph for the machine
356     # (eg. cpu)
357     # $title = the title for the graph
358     # (eg. kernow CPU usage)
359 tdb 1.10 # $vlabel = the vertical label to apply to the left side of the graph
360     # (eg. kb/s)
361 tdb 1.1 # $dataref = a reference to an array containing information for the graph
362 tdb 1.7 # elements of format: "gtype:rrdname:dsname:name#colour:legend:comment with spaces"
363 tdb 1.1 # (if gtype is "NONE" only a DEF of 'name' will be defined, no line will be plotted)
364 tdb 1.7 # (if legend is "NONE" the latest/average/max/min legend won't be printed)
365 tdb 1.1 # $rawcmdref = a reference to an array containing raw rrd commands
366     # elements a single command each, no spaces
367     #
368    
369     sub makegraph() {
370 tdb 1.10 my($machine, $type, $title, $vlabel, $dataref, $rawcmdref) = @_;
371 tdb 1.1 # pass in these arrays by reference
372     my(@data) = @$dataref if defined $dataref;
373     my(@rawcmd) = @$rawcmdref if defined $rawcmdref;
374     # check if directory exists for images
375     if(! -d "$imgdir/$machine") {
376     # not sure on this umask, but it seems to work?
377     mkdir "$imgdir/$machine", 0777;
378 tdb 1.5 &log("created directory $imgdir/$machine\n");
379 tdb 1.1 }
380     my(@rrdcmd);
381     foreach my $dataitem (@data) {
382 tdb 1.7 # dataitem should be: "gtype:rrdname:dsname:name#colour:legend:comment with spaces"
383 tdb 1.1 # (if gtype is "NONE" only a DEF of 'name' will be defined, no line will be plotted)
384 tdb 1.7 # (if legend is "NONE" the latest/average/max/min legend won't be printed)
385     if($dataitem =~ /^(\S+):(\S+):(\S+):(\S+)#(.{6}):(\S+):(.*)$/) {
386 tdb 1.1 push @rrdcmd, "DEF:$4=$rrddir/$machine/$2.rrd:$3:AVERAGE";
387     if($1 ne "NONE") {
388 tdb 1.8 push @rrdcmd, "$1:$4#$5:$7";
389 tdb 1.7 if($6 ne "NONE") {
390     # add some nice values to the legend
391     &addlegend(\@rrdcmd, $4);
392     }
393 tdb 1.1 }
394     }
395     }
396     push @rrdcmd, "--title=$title";
397     push @rrdcmd, "--imgformat=PNG";
398     push @rrdcmd, "--lower-limit=0";
399 tdb 1.10 push @rrdcmd, "--vertical-label=$vlabel";
400 tdb 1.1 # not entirely convinced this is good...
401     push @rrdcmd, "--alt-autoscale-max";
402     # add any further raw commands
403     push @rrdcmd, @rawcmd;
404     RRDs::graph ("$imgdir/$machine/$type-3h.png", "--start=-10800", @rrdcmd);
405     my($err_3h) = RRDs::error;
406 tdb 1.5 &log("created $imgdir/$machine/$type-3h.png\n") unless $err_3h;
407     &error("Error generating 3h graph for $machine/$type: $err_3h\n") if $err_3h;
408 tdb 1.1 RRDs::graph ("$imgdir/$machine/$type-1d.png", "--start=-86400", @rrdcmd);
409     my($err_1d) = RRDs::error;
410 tdb 1.5 &log("created $imgdir/$machine/$type-1d.png\n") unless $err_1d;
411     &error("Error generating 1d graph for $machine/$type: $err_1d\n") if $err_1d;
412 tdb 1.1 RRDs::graph ("$imgdir/$machine/$type-1w.png", "--start=-604800", @rrdcmd);
413     my($err_1w) = RRDs::error;
414 tdb 1.5 &log("created $imgdir/$machine/$type-1w.png\n") unless $err_1w;
415     &error("Error generating 1w graph for $machine/$type: $err_1w\n") if $err_1w;
416 tdb 1.1 RRDs::graph ("$imgdir/$machine/$type-1m.png", "--start=-2678400", @rrdcmd);
417     my($err_1m) = RRDs::error;
418 tdb 1.5 &log("created $imgdir/$machine/$type-1m.png\n") unless $err_1m;
419     &error("Error generating 1m graph for $machine/$type: $err_1m\n") if $err_1m;
420 tdb 1.1 RRDs::graph ("$imgdir/$machine/$type-1y.png", "--start=-31536000", @rrdcmd);
421     my($err_1y) = RRDs::error;
422 tdb 1.5 &log("created $imgdir/$machine/$type-1y.png\n") unless $err_1y;
423     &error("Error generating 1y graph for $machine/$type: $err_1y\n") if $err_1y;
424 tdb 1.1 return;
425 tdb 1.7 }
426    
427     # subroutine to add a legend
428     # accepts reference to an array and a name
429     sub addlegend() {
430     my($dataref, $name) = @_;
431 tdb 1.8 push @$dataref, "GPRINT:$name:LAST:Current\\: \%8.2lf %s";
432     push @$dataref, "GPRINT:$name:AVERAGE:Average\\: \%8.2lf %s";
433     push @$dataref, "GPRINT:$name:MAX:Max\\: \%8.2lf %s\\n";
434 tdb 1.1 }
435    
436     # hacky subroutine to return a colour
437     # could be done much better somehow :/
438     sub get_colour {
439     my($col) = @_;
440     if($col == 0) {
441     return "#0000FF";
442     }
443     elsif($col == 1) {
444     return "#00FF00";
445     }
446     elsif($col == 2) {
447     return "#FF00FF";
448     }
449     elsif($col == 3) {
450     return "#FFFF00";
451     }
452     elsif($col == 4) {
453     return "#00FFFF";
454     }
455     else {
456     return "#000066";
457     }
458 tdb 1.5 }
459    
460     # prints out usage information then exits
461     sub usage() {
462     print "Usage: graph.pl [options]\n";
463     print "Options\n";
464     print " -c config Specifies the configuration file\n";
465     print " default: rrdgraphing.conf\n";
466     print " -v Be verbose about what's happening\n";
467     print " -q Be quiet, even supress errors\n";
468     print " -V Print version number\n";
469     print " -h Prints this help page\n";
470     exit(1);
471     }
472    
473     # prints a log message if verbose is turned on
474     sub log() {
475     my($msg) = @_;
476     print $msg if $verbose;
477     }
478    
479     # prints an error message unless quiet is turned on
480     sub error() {
481     my($msg) = @_;
482     print STDERR $msg unless $quiet;
483 tdb 1.1 }