svc.startd(1M)															    svc.startd(1M)

NAME

       svc.startd - Service Management Facility master restarter

SYNOPSIS

       /lib/svc/bin/svc.startd

       svc:/system/svc/restarter:default

       svc.startd  is  the  master  restarter  daemon for Service Management Facility (SMF) and the default restarter for all services. svc.startd
       starts, stops, and restarts services based on administrative requests, system failures, or application failures.

       svc.startd maintains service state, as well as being responsible for managing faults in accordance with the dependencies of each service.

       svc.startd is invoked automatically during system startup. It is restarted if any  failures  occur.  svc.startd	should	never  be  invoked
       directly.

       See smf_restarter(5) for information on configuration and behavior common to all restarters.

       svcs(1)	reports status for all services managed by the Service Configuration Facility. svcadm(1M) allows manipulation of service instances
       with respect to the service's restarter.

   Environment Variables
       Environment variables with the "SMF_" prefix are reserved and may be overwritten.

       svc.startd supplies the "SMF_" environment variables specified in smf_method(5) to the method.  PATH  is  set  to  "/usr/sbin:/usr/bin"	by
       default. By default, all other environment variables supplied to svc.startd are those inherited from init(1M).

       Duplicate  entries are reduced to a single entry. The value used is undefined. Environment entries that are not prefixed with "<name>=" are
       ignored.

   Restarter Options
       svc.startd is not configured by command line options. Instead, configuration is read from the service configuration repository. You can use
       svccfg(1M) to set all options and properties.

       The following configuration variables in the options property group are available to developers and administrators:

       boot_messages

	   An  astring (as defined in scf_value_is_type; see scf_value_is_type(3SCF)) that describes the default level of messages to print to the
	   console during boot. The supported message options include quiet and verbose. The quiet option prints minimal messages to console  dur-
	   ing	boot.	The  verbose  option  prints  a single message per service started to indicate success or failure. You can use the boot -m
	   option to override the boot_messages setting at boot time. See kernel(1M).

       logging

	   Control  the  level	of  framework  and  service  logging  of  svc.startd.  An  astring   (as   defined   in   scf_value_is_type;   see
	   scf_value_is_type(3SCF))  that  describes  the  default  level  of  messages to print to the console during boot. The supported message
	   options include quiet, verbose, and debug.  The quiet option prints standard per-service output and error messages  requiring  adminis-
	   trative  intervention.  The verbose option prints standard per-service output with more informational messages. The debug option prints
	   standard per-service output and all svc.startd messages to log.

       milestone

	   An FMRI which determines the milestone used as the default boot level. Acceptable options include only the major milestones:

	   svc:/milestone/single-user:default
	   svc:/milestone/multi-user:default
	   svc:/milestone/multi-user-server:default

	   or the special values all or none. all represents an idealized milestone that depends on every service. none  is  a	special  milestone
	   where  no  services	are  running apart from the master svc:/system/svc/restarter:default. By default, svc.startd uses all, a synthetic
	   milestone that depends on every service. If this property is specified, it overrides any initdefault setting in inittab(4).

       system/reconfigure

	   Indicates that a reconfiguration reboot has been requested. Services with actions that must key off of  a  reconfiguration  reboot  may
	   check that this property exists and is set to 1 to confirm a reconfiguration boot has been requested.

	   This property is managed by svc.startd and should not be modified by the administrator.

       Configuration errors, such as disabling svc.startd are logged by syslog, but ignored.

   SERVICE STATES
       Services managed by svc.startd can appear in any of the states described in smf(5). The state definitions are unmodified by this restarter.

   SERVICE REPORTING
       In addition to any logging done by the managed service, svc.startd provides a common set of service reporting and logging mechanisms.

       Reporting properties svc.startd updates a common set of properties on all services it manages. These properties are a common interface that
       can be used to take action based on service instance health. The svcs(1) command can be used to easily display these properties.

       restarter/state
       restarter/next_state

	   The current and next (if currently in transition) state for an instance.

       restarter/auxiliary_state

	   A caption detailing additional information about the current instance state. The auxiliary state  available	for  services  managed	by
	   svc.startd is:

	   maintenance
			   fault_threshold_reached
			   stop_method_failed
			   administrative_request

       restarter/state_timestamp

	   The time when the current state was reached.

       restarter/contract

	   The primary process contract ID, if any, that under which the service instance is executing.

       Logs

       By  default,  svc.startd  provides  logging of significant restarter actions for the service as well as method standard output and standard
       error file descriptors to /var/svc/log/service:instance.log. The level of restarter action logging  is  specified  by  the  options/logging
       property.

   SERVICE DEFINITION
       When  developing  or configuring a service managed by svc.startd, a common set of properties are used to affect the interaction between the
       service instance and the restarter.

       Methods

       The general form of methods for the fork/exec model provided by svc.startd are presented in smf_method(5). The following methods  are  sup-
       ported as required or optional by services managed by svc.startd.

       refresh

	   Reload  any appropriate configuration parameters from the repository or config file, without interrupting service. This is often imple-
	   mented using SIGHUP for system daemons. If the service is unable to recognize configuration	changes  without  a  restart,  no  refresh
	   method is provided.

	   This method is optional.

       start

	   Start  the service. Return success only after the application is available to consumers. Fail if a conflicting instance is already run-
	   ning, or if the service is unable to start.

	   This method is required.

       stop

	   Stop the service. In some cases, the stop method can be invoked when some or all of the service has already been stopped.  Only  return
	   an error if the service is not entirely stopped on method return.

	   This method is required.

       If the service does not need to take any action in a required method, it must specify the :true token for that method.

       svc.startd  honors  any	method	context  specified  for  the  service  or  any	specific  method. The method expansion tokens described in
       smf_method(5) are available for use in all methods invoked by svc.startd.

       Properties

       An overview of the general properties is available in smf(5). The specific way in which these general properties interacts with	svc.startd
       follows:

       general/enabled

	   If  enabled	is  set to true, the restarter attempts to start the service once all its dependencies are satisfied. If set to false, the
	   service remains in the disabled state, not running.

       general/restarter

	   If this FMRI property is empty or set to svc:/system/svc/restarter:default, the  service  is  managed  by  svc.startd.  Otherwise,  the
	   restarter specified is responsible (once it is available) for managing the service.

       general/single_instance

	   If single_instance is set to true, svc.startd only allows one instance of this service to transition to online or degraded at any time.

       Additionally, svc.startd managed services can define the optional properties listed below in the startd property group.

       startd/duration

	   The	duration  property defines the service's model. It can be set to transient, child also known as "wait" model services, or contract
	   (the default).

       startd/ignore_error

	   The ignore_error property, if set, specifies a comma-separated list of ignored events. Legitimate string values in that list  are  core
	   and signal. The default is to restart on all errors.

       startd/need_session

	   The	need_session property, if set to true, indicates that the instance should be launched in its own session. The default is not to do
	   so.

       startd/utmpx_prefix

	   The utmpx_prefix string property defines that the instance requires a valid utmpx entry prior to start method execution. The default is
	   not to create a utmpx entry.

   SERVICE FAILURE
       svc.startd assumes that a method has failed if it returns a non-zero exit code. If $SMF_EXIT_ERR_CONFIG or $SMF_EXIT_ERR_FATAL is returned,
       svc.startd immediately places the service in the maintenance state. For all other failures, svc.startd places the service  in  the  offline
       state.If a service is offline and its dependencies are satisfied, svc.startd tries again to start the service (see smf(5)).

       If  three  method  failures  happen in a row, or if the service is restarting more than once a second, svc.startd places the service in the
       maintenance state.

       The conditions of service failure are defined by a combination of the service model (defined by the startd/duration property) and the value
       of the startd/ignore_error property.

       A contract model service fails if any of the following conditions occur:

	 o  all processes in the service exit

	 o  any processes in the service produce a core dump

	 o  a  process outside the service sends a service process a fatal signal (for example, an administrator terminates a service process with
	    the pkill command)

       The last two conditions may be ignored by the service by specifying core and/or signal in startd/ignore_error.

       Defining a service as transient means that svc.startd does not track processes for that service. Thus, the potential faults  described  for
       contract model services are not considered failures for transient services. A transient service only enters the maintenance state if one of
       the method failure conditions occurs.

       "Wait" model services are restarted whenever the child process associated with the service exits. A child process that exits is not consid-
       ered an error for "wait" model services, and repeated failures do not lead to a transition to maintenance state.

   LEGACY SERVICES
       svc.startd  continues  to  provide support for services invoked during the startup run level transitions. Each /etc/rc?.d directory is pro-
       cessed after all managed services which constitute the equivalent run level milestone have transitioned to the online state.  Standard init
       scripts placed in the /etc/rc?.d directories are run in the order of their sequence numbers.

       The milestone to run-level mapping is:

       milestone/single-user

	   Single-user (S)

       milestone/multi-user

	   Multi-user(2)

       milestone/multi-user-server

	   Multi-user with network services(3)

       Additionally,  svc.startd  gives  these	legacy	services  visibility in SMF by inserting an instance per script into the repository. These
       legacy instances are visible using standard SMF interfaces such as svcs(1), always appear in the LEGACY-RUN state, cannot be modified,  and
       can  not  be specified as dependencies of other services. The initial start time of the legacy service is captured as a convenience for the
       administrator.

       /var/svc/log	       Directory where svc.startd stores log files.

       /etc/svc/volatile       Directory where svc.startd stores log files in early stages of boot, before /var is mounted read-write.

EXAMPLE

       Example 1: Turning on Verbose Logging

       To turn on verbose logging, type the following:

       # /usr/sbin/svccfg -s system/svc/restarter:default
       svc:/system/svc/restarter:default> addpg options application
       svc:/system/svc/restarter:default> setprop options/logging = 
       astring: verbose
       svc:/system/svc/restarter:default> exit

       This request will take effect on the next restart of svc.startd.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

       svcs(1), svcprop(1), kernel(1M), init(1M), svcadm(1M), svccfg(1M), svc.configd(1M), setsid(2), libscf(3LIB), scf_value_is_type(3SCF),  con-
       tract(4), init.d(4), process(4), inittab(4), attributes(5), smf(5), smf_method(5)

								    2 Aug 2005							    svc.startd(1M)