<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE erlref SYSTEM "erlref.dtd">

<erlref>
  <header>
    <copyright>
      <year>2007</year><year>2018</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
      You may obtain a copy of the License at
 
          http://www.apache.org/licenses/LICENSE-2.0

      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      See the License for the specific language governing permissions and
      limitations under the License.
    
    </legalnotice>

    <title>inets</title>
    <prepared>Ingela Anderton Andin</prepared>
    <responsible></responsible>
    <docno></docno>
    <date></date>
    <rev></rev>
  </header>
  <module since="">inets</module>
  <modulesummary>The Inets services API.</modulesummary>
  <description>
    <p>This module provides the most basic API to the 
    clients and servers that are part of the <c>Inets</c> application,
    such as start and stop.</p>

    <marker id="common_data_types"></marker>
  </description>

  <section>
    <title>DATA TYPES</title>
    <p>Type definitions that are used more than once in
      this module:</p>
    <p><c>service() = ftpc | tftp | httpc | httpd</c></p>
    <p><c>property() = atom()</c></p>
    <marker id="functions"></marker>
    <marker id="services"></marker>
  </section>

  <funcs>
    <func>
      <name since="">services() -> [{Service, Pid}]</name>
      <fsummary>Returns a list of currently running services.</fsummary>
      <type>
        <v>Service = service()</v>
        <v>Pid = pid()</v>
      </type>
      <desc>
        <p>Returns a list of currently running services.</p>
        <note>
	  <p>Services started as <c>stand_alone</c> are not listed.</p>
        </note>

	<marker id="services_info"></marker>
      </desc>
    </func>

    <func>
      <name since="">services_info() -> [{Service, Pid, Info}]</name>
      <fsummary>Returns a list of currently running services where
      each service is described by an <c>[{Option, Value}]</c>
      list.</fsummary>
      <type>
        <v>Service = service()</v>
        <v>Pid = pid()</v>
        <v>Info = [{Option, Value}]</v>
        <v>Option = property()</v>
        <v>Value = term()</v>
      </type>
      <desc>
        <p>Returns a list of currently running services where each
	service is described by an <c>[{Option, Value}]</c> list. The
	information in the list is specific for each service
	and each service has probably its own info
	function that gives more details about the service.</p>

	<marker id="service_names"></marker>
      </desc>
    </func>
    
    <func>
      <name since="">service_names() -> [Service] </name>
      <fsummary>Returns a list of available service names.</fsummary>
      <type>
	<v>Service = service()</v>
      </type>
      <desc>
        <p>Returns a list of available service names.</p>

	<marker id="start"></marker>
      </desc>
    </func>
    
    <func>
      <name since="">start() -> </name>
      <name since="">start(Type) -> ok | {error, Reason}</name>
      <fsummary>Starts the <c>Inets</c> application.</fsummary>
      <type>
        <v>Type = permanent | transient | temporary</v>
      </type>
      <desc>
        <p>Starts the <c>Inets</c> application. Default type
	is <c>temporary</c>. See also
	<seealso marker="kernel:application">application(3)</seealso>.</p>

	<marker id="stop"></marker>
      </desc>
    </func>

    <func>
      <name since="">start(Service, ServiceConfig) -> {ok, Pid} | {error, Reason}</name>
      <name since="">start(Service, ServiceConfig, How) -> {ok, Pid} | {error, Reason}</name>
      <fsummary>Dynamically starts an <c>Inets</c>
      service after the <c>Inets</c> application has been started.</fsummary>
      <type>
        <v>Service = service()</v>
        <v>ServiceConfig = [{Option, Value}]</v>
	<v>Option = property()</v>
	<v>Value = term()</v>
        <v>How = inets | stand_alone - default is inets.</v>
      </type>
      <desc>
        <p>Dynamically starts an <c>Inets</c> service after the <c>Inets</c>
          application has been started.</p>
        <note>
          <p>Dynamically started services are not handled by
            application takeover and failover behavior when <c>Inets</c> is
            run as a distributed application. Nor are they
            automatically restarted when the <c>Inets</c> application is
            restarted. As long as the <c>Inets</c> application is operational,
	    they are supervised and can be soft code upgraded.</p>
	    <p>A service started as <c>stand_alone</c>, that is, the service 
	    is not started as part of the <c>Inets</c> application, 
	    lose all OTP application benefits, such as soft upgrade. 
	    The <c>stand_alone</c>-service is linked to
            the process that started it. Usually some
            supervision functionality is still in place and in
            some sense the calling process becomes the top
            supervisor.</p>
        </note>
	
	<marker id="stop2"></marker>
      </desc>
    </func>

     <func>
      <name since="">stop() -> ok </name>
      <fsummary>Stops the <c>Inets</c> application.</fsummary>
      <desc>
        <p>Stops the <c>Inets</c> application. See also
	<seealso marker="kernel:application">application(3)</seealso>.</p>
	
	<marker id="start2"></marker>
      </desc>
    </func>
    
    <func>
      <name since="">stop(Service, Reference) -> ok | {error, Reason} </name>
      <fsummary>Stops a started service of the <c>Inets</c> application or takes
          down a <c>stand_alone </c>service gracefully.</fsummary>
      <type>
	<v>Service = service() | stand_alone</v>
	<v>Reference = pid() | term() - service-specified reference</v>
	<v>Reason = term()</v>
      </type>
      <desc>
        <p>Stops a started service of the <c>Inets</c> application or takes
	down a <c>stand_alone</c>-service gracefully. When option
	<c>stand_alone</c> is used in start,
	only the pid is a valid argument to stop.</p>
	
	<marker id="see_also"></marker>
      </desc>
    </func>
  </funcs>

  <section>
    <title>SEE ALSO</title>
    <p><seealso marker="httpc">httpc(3)</seealso>,
    <seealso marker="httpd">httpd(3)</seealso>
    </p>
  </section>
  
</erlref>


