/[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 1.11 - (show annotations)
Tue May 13 16:00:53 2003 UTC (15 years, 10 months ago) by dpavlin
Branch: MAIN
CVS Tags: HEAD
Changes since 1.10: +1 -1 lines
File MIME type: text/plain
moved alarm off to avoid hanging on df command (if nfs shares are involved
it's quote often!)

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 # http://www.rot13.org/~dpavlin/sysadm.html
9 #
10 # Usage:
11 #
12 # parse_df.pl "ssh -i ~cricket/.ssh/df target.host" /mount_point
13 # ssh into remote host and get data for /mount_point
14 #
15 # parse_df.pl "ssh -i ~cricket/.ssh/df target.host" --config
16 # dump configuration file to stdout
17 #
18
19 use strict;
20
21 my $ssh = shift @ARGV || "";
22 my $mount = shift @ARGV || "/";
23
24 # do we have Cache::FileCache installed?
25
26 my $USE_CACHE = 0;
27 eval("use Cache::FileCache;");
28 if (! $@) { $USE_CACHE = 1; }
29
30 my $df;
31
32 my $cache = new Cache::FileCache() if ($USE_CACHE);
33
34 sub parse_df {
35 my $ssh = shift @_;
36 if ($USE_CACHE) {
37 print STDERR " [using cache] ";
38 $df = $cache->get( $ssh );
39 return if (defined $df);
40 print STDERR " [cache miss] ";
41 }
42 eval {
43 local $SIG{ALRM} = sub { die "ssh timeout\n"; };
44 alarm 10; # wait for ssh to connect and return first line
45 open(DF,"$ssh df -klP |") || die "$ssh df: $!";
46 };
47 print STDERR " read DF eof=",eof(DF);
48 while(<DF>) {
49 chomp;
50 my ($node,$total,$used,$aval,$use_pcnt,$mount) = split(/\s+/,$_,6);
51 if ($use_pcnt && $use_pcnt =~ s/(\d+)%/$1/) {
52 # print STDERR "$_\n";
53 # $df->{$mount}=$use_pcnt;
54 $df->{$mount}=$used * 100 / $total if ($total != 0);
55 # print $df->{$mount}," == $use_pcnt\n";
56 }
57 }
58 close(DF);
59 alarm 0; # turn alarm off
60 $cache->set( $ssh, $df, "1 min" ) if ($USE_CACHE);
61 }
62
63 parse_df($ssh);
64
65 if ($mount eq "--config") {
66 print <<"EOF";
67 target --default--
68 ssh = "$ssh"
69 long-desc = "edit name of your host here"
70
71 EOF
72 my @targets;
73
74 foreach my $mnt (keys %{$df}) {
75 my $target = $mnt;
76 if ($mnt eq "/") {
77 $target = "root";
78 } else {
79 $target =~ s,^/,,;
80 $target =~ s,/,_,g;
81 }
82 push @targets,$target;
83 print <<"EOF";
84 target $target
85 target-type = usage
86 display-name = "$mnt"
87 skip-overview = 1
88
89 EOF
90 }
91 print "target overview
92 mtargets = \"",join("; ",@targets),"\"
93 target-type = usage
94 y-min = 0
95 y-max = 100\n";
96 exit 1;
97 }
98
99 # dump free %
100 #
101 print $df->{$mount} || "unknown";
102 print "\n";

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