Munin::Node::OS(3pm)					User Contributed Perl Documentation				      Munin::Node::OS(3pm)

NAME

       Munin::Node::OS - OS related utility methods for the Munin node.

SYNOPSIS

	use Munin::Node::OS;
	my $uid  = Munin::Node::OS->get_uid('foo');
	my $host = Munin::Node::OS->get_fq_hostname();

METHODS

       get_uid
	    $uid = $class->get_uid($user)

	   Returns the user ID. $user might either be a user name or a user ID. Returns undef if the user doesn't exist.

       get_gid
	    $gid = $class->get_gid($group)

	   Returns the group ID. $group might either be a group name or a group ID. Returns undef if the group doesn't exist.

       get_fq_hostname
	    $host = $class->get_fq_hostname()

	   Returns the fully qualified host name of the machine.

       check_perms_if_paranoid
	    $bool = $class->check_perms_if_paranoid($target);

	   If paranoia is enabled, returns false unless $target is owned by root, and has safe permissions.  If $target is a file, also checks the
	   directory it inhabits.

       run_as_child
	     $result = run_as_child($timeout, $coderef, @arguments);

	   Creates a child process to run $code and waits for up to $timeout seconds for it to complete.  Returns a hashref containing the
	   following keys:

	   "stdout", "stderr"
	       Array references containing the output of these filehandles;

	   "retval"
	       The result of wait();

	   "timed_out"
	       True if the child had to be interrupted.

	   System errors will cause it to carp.

       reap_child_group
	    $class->reap_child_group($pid);

	   Sends SIGHUP and SIGKILL to the process group identified by $pid.

	   Sleeps for 2 seconds between SIGHUP and SIGKILL.

       possible_to_signal_process
	    my $bool = $class->possible_to_signal_process($pid)

	   Check whether it's possible to send a signal to $pid (that means, to be brief, that the process is owned by the same user, or we are
	   the super-user).  This is a useful way to check that a child process is alive (even if only as a zombie) and hasn't changed its UID.

       set_effective_user_id
	    eval {
		$class->set_effective_user_id($uid);
	    };
	    if ($@) {
		# Failed to set EUID
	    }

	   The name says it all ...

       set_effective_group_id
	   See documentation for set_effective_user_id()

       set_real_user_id
	   See documentation for set_effective_user_id()

       set_real_group_id
	   See documentation for set_effective_user_id()

       set_umask
	   Set umask so that files created by plugins are group writable Only call right before exec-ing a plugin.

perl v5.14.2							    2013-11-12						      Munin::Node::OS(3pm)