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  <header>
    <copyright>
      <year>2004</year><year>2013</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.
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    <title>snmpa_supervisor</title>
    <prepared></prepared>
    <responsible></responsible>
    <docno></docno>
    <approved></approved>
    <checked></checked>
    <date></date>
    <rev></rev>
    <file>snmpa_supervisor.xml</file>
  </header>
  <module>snmpa_supervisor</module>
  <modulesummary>A supervisor for the SNMP agent Processes</modulesummary>
  <description>
    <p>This is the top supervisor for the agent part of the SNMP 
      application. There is always one supervisor at each node with 
      an SNMP agent (master agent or sub-agent).
      </p>
  </description>
  <funcs>
    <func>
      <name>start_sub_sup(Opts) -> {ok, pid()} | {error, {already_started, pid()}} | {error, Reason}</name>
      <fsummary>Start the SNMP supervisor for sub-agents only</fsummary>
      <type>
        <v>Opts = [opt()]</v>
        <v>opt() = {db_dir, string()} | ...</v>
      </type>
      <desc>
        <p>Starts a supervisor for the SNMP agent system without a
          master agent.  The supervisor starts all involved SNMP
          processes, but no agent processes.  Sub-agents should be
          started by calling <c>start_sub_agent/3</c>.
          </p>
        <p><c>db_dir</c> is mandatory.</p>
        <p>See <seealso marker="snmp_config#configuration_params">configuration parameters</seealso> for 
          a description of the options.</p>
      </desc>
    </func>
    <func>
      <name>start_master_sup(Opts) -> {ok, pid()} |  {error, {already_started, pid()}} | {error, Reason}</name>
      <fsummary>Start the SNMP supervisor for all agents</fsummary>
      <type>
        <v>Opts = [opt()]</v>
        <v>opt() = {db_dir, string()} | {config, ConfOpts()} | ...</v>
        <v>ConfOpts = [conf_opts()]</v>
        <v>conf_opts() = {dir, string()} | ...</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Starts a supervisor for the SNMP agent system.  The
          supervisor starts all involved SNMP processes, including the
          master agent.  Sub-agents should be started by calling
          <c>start_subagent/3</c>.
          </p>
        <p><c>db_dir</c> is mandatory.</p>
        <p><c>dir</c> in config is mandatory.</p>
        <p>See <seealso marker="snmp_config">snmp config</seealso> for 
          a description of the options.</p>
      </desc>
    </func>
    <func>
      <name>start_sub_agent(ParentAgent,Subtree,Mibs) -> {ok, pid()} | {error, Reason}</name>
      <fsummary>Start a sub-agent</fsummary>
      <type>
        <v>ParentAgent = pid()</v>
        <v>SubTree = oid()</v>
        <v>Mibs = [MibName]</v>
        <v>MibName = [string()]</v>
      </type>
      <desc>
        <p>Starts a sub-agent on the node where the function is
          called.  The <c>snmpa_supervisor</c> must be running.
          </p>
        <p>If the supervisor is not running, the function fails with the
          reason <c>badarg</c>.</p>
      </desc>
    </func>
    <func>
      <name>stop_sub_agent(SubAgent) -> ok | no_such_child</name>
      <fsummary>Stop a sub-agent</fsummary>
      <type>
        <v>SubAgent = pid()</v>
      </type>
      <desc>
        <p>Stops the sub-agent on the node where the function is
          called.  The <c>snmpa_supervisor</c> must be running.
          </p>
        <p>If the supervisor is not running, the function fails with the
          reason <c>badarg</c>.</p>
      </desc>
    </func>
  </funcs>
  
</erlref>

