/usr/share/perl5/Rex/Commands/Sysctl.pm is in rex 1.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# (c) Jan Gehring <jan.gehring@gmail.com>
#
# vim: set ts=2 sw=2 tw=0:
# vim: set expandtab:
=head1 NAME
Rex::Commands::Sysctl - Manipulate sysctl
=head1 DESCRIPTION
With this module you can set and get sysctl parameters.
Version <= 1.0: All these functions will not be reported.
All these functions are not idempotent.
This function doesn't persist the entries in /etc/sysctl.conf.
=head1 SYNOPSIS
use Rex::Commands::Sysctl;
my $data = sysctl "net.ipv4.tcp_keepalive_time";
sysctl "net.ipv4.tcp_keepalive_time" => 1800;
=head1 EXPORTED FUNCTIONS
=cut
package Rex::Commands::Sysctl;
use strict;
use warnings;
our $VERSION = '1.4.1'; # VERSION
use Rex::Logger;
use Rex::Commands::Run;
require Rex::Exporter;
use base qw(Rex::Exporter);
use vars qw(@EXPORT);
@EXPORT = qw(sysctl);
=head2 sysctl($key [, $val])
This function will read the sysctl key $key.
If $val is given, then this function will set the sysctl key $key.
task "tune", "server01", sub {
if( sysctl("net.ipv4.ip_forward") == 0 ) {
sysctl "net.ipv4.ip_forward" => 1;
}
};
=cut
sub sysctl {
my ( $key, $val ) = @_;
if ($val) {
Rex::Logger::debug("Setting sysctl key $key to $val");
my $ret = run "/sbin/sysctl -n $key";
if ( $ret ne $val ) {
run "/sbin/sysctl -w $key=$val";
if ( $? != 0 ) {
die("Sysctl failed $key -> $val");
}
}
else {
Rex::Logger::debug("$key has already value $val");
}
}
else {
my $ret = run "/sbin/sysctl -n $key";
if ( $? == 0 ) {
return $ret;
}
else {
Rex::Logger::info( "Error getting sysctl key: $key", "warn" );
die("Error getting sysctl key: $key");
}
}
}
1;
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