/[cricket]/parse_df.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /parse_df.pl

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Revision 1.7 - (show annotations)
Thu Jul 18 10:23:24 2002 UTC (21 years, 8 months ago) by dpavlin
Branch: MAIN
Changes since 1.6: +22 -7 lines
File MIME type: text/plain
use Cache::FileCache if available (that way, we will connect to each host
only once and cache result)

1 #!/usr/bin/perl -w
2 #
3 # cricket module which creates configuration file (when called with
4 # apropriate option), re-reads configuration (so that it can report
5 # filesystems in same order always)
6 #
7 # Dobrica Pavlinusic <dpavlin@rot13.org>
8 #
9 # Usage:
10 #
11 # parse_df.pl "ssh -i ~cricket/.ssh/df host.dom" /mount_point
12 # ssh into remote host and get data for /mount_point
13 #
14 # parse_df.pl "ssh -i ~cricket/.ssh/df --config"
15 # dump configuration file to stdout
16 #
17
18 use strict;
19
20 my $ssh = shift @ARGV || "";
21 my $mount = shift @ARGV || "/";
22
23 # do we have Cache::FileCache installed?
24
25 my $USE_CACHE = 0;
26 eval("use Cache::FileCache;");
27 if (! $@) { $USE_CACHE = 1; }
28
29 my $df;
30
31 my $cache = new Cache::FileCache() if ($USE_CACHE);
32
33 sub parse_df {
34 my $ssh = shift @_;
35 if ($USE_CACHE) {
36 print STDERR " [using cache] ";
37 $df = $cache->get( $ssh );
38 return if (defined $df);
39 print STDERR " [cache miss] ";
40 }
41 open(DF,"$ssh df -klP |") || die "$ssh df: $!";
42 while(<DF>) {
43 chomp;
44 my ($node,$total,$used,$aval,$use_pcnt,$mount) = split(/\s+/,$_,6);
45 if ($use_pcnt && $use_pcnt =~ s/(\d+)%/$1/) {
46 # print STDERR "$_\n";
47 # $df->{$mount}=$use_pcnt;
48 $df->{$mount}=$used * 100 / $total if ($total != 0);
49 # print $df->{$mount}," == $use_pcnt\n";
50 }
51 }
52 close(DF);
53 $cache->set( $ssh, $df, "1 min" ) if ($USE_CACHE);
54 }
55
56 parse_df($ssh);
57
58 if ($mount eq "--config") {
59 print <<"EOF";
60 target --default--
61 ssh = "$ssh"
62 long-desc = "edit name of your host here"
63
64 EOF
65 my @targets;
66
67 foreach my $mnt (keys %{$df}) {
68 my $target = $mnt;
69 if ($mnt eq "/") {
70 $target = "root";
71 } else {
72 $target =~ s,^/,,;
73 $target =~ s,/,_,g;
74 }
75 push @targets,$target;
76 print <<"EOF";
77 target $target
78 target-type = usage
79 display-name = "$mnt"
80 skip-overview = 1
81
82 EOF
83 }
84 print "target overview
85 mtargets = \"",join("; ",@targets),"\"
86 target-type = usage
87 y-min = 0
88 y-max = 100\n";
89 exit 1;
90 }
91
92 # dump free %
93 #
94 print $df->{$mount} || "unknown";
95 print "\n";

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