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|
#!/usr/bin/perl
use strict;
use Getopt::Long;
use IPC::Run qw< start >;
use Time::HiRes qw< sleep >;
#
# main
# ----
MAIN: {
run() unless caller();
}
#
# run()
# ---
sub run {
# default options
my %options = (
count => 5,
);
# process comand line options
Getopt::Long::Configure(qw< no_auto_abbrev no_ignore_case >);
GetOptions(\%options, qw{
help|h! version|V!
loop|l! count|c=i
debug|d! format|as|F=s
}) or pod2usage(1);
# handle --help and --version
$options{help} and pod2usage(2);
$options{version} and version();
# debug mode forces normal output
$options{format} = "human" if $options{debug};
# check the output format to use
if (lc $options{format} eq "json") {
if (eval "use JSON; 1") {
# use JSON v2 API even with JSON v1
if (JSON->VERSION < 2.00) {
no warnings;
*to_json = *JSON::encode = \&JSON::objToJson;
*from_json = *JSON::decode = \&JSON::jsonToObj;
}
}
else {
$options{format} = "human";
}
}
# read the rest of the arguments
my ($first_oid, $extsnmp_bin, @extsnmp_args) = @ARGV;
# prepare the command
my @cmd = ( $extsnmp_bin, @extsnmp_args );
my ($in, $out, $err) = ("", "", "");
# execute the program
my $process = start(\@cmd, \$in, \$out, \$err)
or die "fatal: Can't execute '$extsnmp_bin'. Exit status: $?\n";
# wait for the program to initialise
sleep .5;
my $oid = $first_oid;
my $count = $options{count};
my $i = 1;
my @data;
while ($process->pumpable) {
$oid = $oid eq "NONE" ? $first_oid : $oid;
$in = "getnext\n$oid\n";
print "--> getnext\n--> $oid\n" if $options{debug};
$process->pump until index($out, $/) > 0;
($oid, my $type, my $value) = split /$\//, $out;
$out =~ s/^/<-- /gm, print $out if $options{debug};
$out = "";
if ($oid eq "NONE") {
if ($options{loop} and $count > 0) {
$count--;
if ($options{format} eq "json") {
print to_json(\@data), $/;
@data = ();
}
else {
print "-" x 10, $/;
}
next
}
else {
last
}
}
if ($options{format} eq "csv") {
print "$oid;$type;$value\n";
}
elsif ($options{format} eq "json") {
push @data, { oid => $oid, type => $type, value => $value };
}
else {
print "$oid ($type) = $value\n";
}
}
print to_json(\@data), $/ if $options{format} eq "json";
$process->finish;
}
#
# pod2usage()
# ---------
sub pod2usage {
my ($level) = @_;
if (eval { require Pod::Usage }) {
Pod::Usage::pod2usage({
-exitval => 0, -verbose => $level, -noperldoc => 1,
});
}
else {
require Pod::Text;
Pod::Text::pod2text(__FILE__, \*STDOUT);
exit;
}
}
#
# version()
# -------
sub version {
print "$::PROGRAM v$::VERSION\n";
exit;
}
32272
__END__
=head1 NAME
pseudo-walk - Manually walk the OID tree provided by a Net-SNMP extension
=head1 SYNOPSIS
pseudo-walk [--debug] [--loop] [--count N] [--format type]
first-oid path/to/snmpext [snmpext args ..]
pseudo-walk --help
pseudo-walk --version
=head1 OPTIONS
B<Behaviour options>
=over
=item B<-l>, B<--loop>
Run in loop mode.
=item B<-c>, B<--count> I<number>
Specify the number of times to loop over. Defaults to 5.
=back
B<Output options>
=over
=item B<-d>, B<--debug>
Enable debug mode, printing the communication with the SNMP extension.
=item B<-F>, B<--format> I<type>
Specify how to print the data from the SNMP extension.
Available types are C<csv>, C<json> and C<human>. Defaults to C<human>.
=back
B<Standard options>
=over
=item B<-h>, B<--help>
Print this help screen and exit.
=item B<-V>, B<---version>
Print the program name and version and exit.
=back
=head1 DESCRIPTION
This program is a tool to help developers of Net-SNMP C<pass_persist>
extensions by manually walking the OID tree it provides, as Net-SNMP
would do if queried by snmpwalk.
=head1 AUTHOR
SE<eacute>bastien Aperghis-Tramoni, C<< <sebastien at aperghis.net> >>
=head1 COPYRIGHT & LICENSE
Copyright 2008-2010 SE<eacute>bastien Aperghis-Tramoni, all rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=cut
|
