services in linux

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services

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munin::node::service

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

NAME

       Munin::Node::Service - Methods related to handling of Munin services

SYNOPSIS

	my $services = Munin::Node::Service->new(timeout => 30);
	$services->prepare_plugin_environment;
	if ($services->is_a_runnable_service($file_name)) {
	   $services->fork_service($file_name);
	}

METHODS

       new
	    my $services = Munin::Node::Service->new(%args);

	   Constructor.  All arguments are optional.  Valid arguments are:

	   "servicedir"
		   The directory that will be searched for services.

	   "defuser", "defgroup"
		   The default uid and gid that services will run as.  Service-specific user and group directives (as set by the service
		   configuration files) will override this.

	   "timeout"
		   The default timeout for services.  Services taking longer than this to run will be killed.  Service-specific timeouts will (as
		   set in the service configuration files) will override this value.

       is_a_runnable_service
	    my $bool = $services->is_a_runnable_service($file_name);

	   Runs miscellaneous tests on $file_name in the service directory, to try and establish whether it is a runnable service.

       list
	     my @services = $services->list;

	   Returns a list of all the runnable services in the directory.

       prepare_plugin_environment
	    $services->prepare_plugin_environment(@services);

	   Carries out various tasks that plugins require before being run, such as loading service configurations and exporting common
	   environment variables.

       export_service_environment
	    $services->export_service_enviromnent($service);

	   Exports all the environment variables specific to service $service.

       change_real_and_effective_user_and_group
	    $service->change_real_and_effective_user_and_group($service);

	   Changes the current process' effective group and user IDs to those specified in the configuration, or the default user or group
	   otherwise.  Also changes the real group and user IDs if the operating system supports it.

	   On failure, causes the process to exit.

       exec_service
	    $service->exec_service($service, [$argument]);

	   Replaces the current process with an instance of service $service in $directory, running with the correct environment and privileges.

	   This function never returns.  The process will exit(2) if the service to be run failed the paranoia check.

       fork_service
	    $result = $service->fork_service($service, [$argument]);

	   Identical to exec_service(), except it runs the service in a subprocess.  If the service takes longer than the timeout, it will be
	   terminated.

	   Returns a hash reference containing (among other things) the service's output and exit value.  (See documentation for run_as_child() in
	   Munin::Node::Service for a comprehensive description.)

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

UNIX for Dummies Questions & Answers