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  <header>
    <copyright>
      <year>1997</year><year>2016</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>mod_auth</title>
    <prepared>Joakim Greben&ouml;</prepared>
    <docno></docno>
    <date>1997-10-14</date>
    <rev>2.3</rev>
    <file>mod_auth.sgml</file>
  </header>
  <module since="">mod_auth</module>
  <modulesummary>User authentication using text files, Dets, or Mnesia database.</modulesummary>
  <description>
    <p>This module provides for basic user authentication using
    textual files, Dets databases, or Mnesia databases.</p>
  </description>

  <funcs>
     <func>
      <name since="">add_group_member(GroupName, UserName, Options) -> true | {error, Reason}</name>
      <name since="">add_group_member(GroupName, UserName, Port, Dir) -> true | {error, Reason}</name>
      <name since="">add_group_member(GroupName, UserName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Adds a user to a group.</fsummary>
      <type>
        <v>GroupName = string()</v>
        <v>UserName = string()</v>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p><c>add_group_member/3, add_group_member/4</c>, and 
	<c>add_group_member/5</c> each
	adds a user to a group. If the group does not exist, it 
	is created and the user is added to the group. Upon successful 
	operation, this function returns <c>true</c>. 
	When <c>add_group_members/3</c> 
	is called, options <c>Port</c> and <c>Dir</c> are mandatory.</p>
      </desc>
    </func>
    
    <func>
      <name since="">add_user(UserName, Options) -> true| {error, Reason}</name>
      <name since="">add_user(UserName, Password, UserData, Port, Dir) -> true | {error, Reason}</name>
      <name since="">add_user(UserName, Password, UserData, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Adds a user to the user database.</fsummary>
      <type>
        <v>UserName = string()</v>
        <v>Options = [Option]</v>
        <v>Option = {password,Password} | {userData,UserData} | {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Password = string()</v>
        <v>UserData = term()</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>AuthPassword =string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p><c>add_user/2, add_user/5</c>, and <c>add_user/6</c> each adds a 
	user to the user database. If the operation is successful, 
	this function returns <c>true</c>. If an error occurs, 
	<c>{error,Reason}</c> is returned. 
	When <c>add_user/2</c> is called, options <c>Password</c>, 
	<c>UserData</c>, <c>Port</c>, and <c>Dir</c> are mandatory.</p>
      </desc>
    </func>

     <func>
      <name since="">delete_group(GroupName, Options) -> true | {error,Reason} &lt;name>delete_group(GroupName, Port, Dir) -> true | {error, Reason}</name>
      <name since="">delete_group(GroupName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Deletes a group.</fsummary>
      <type>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>GroupName = string()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
	<p><c>delete_group/2, delete_group/3</c>, and <c>delete_group/4</c> 
	each deletes the group specified and returns <c>true</c>. 
	If there is an error, <c>{error, Reason}</c> is returned. 
	When <c>delete_group/2</c> is called, option
	<c>Port</c> and <c>Dir</c> are mandatory.</p>
      </desc>
    </func>

     <func>
      <name since="">delete_group_member(GroupName, UserName, Options) -> true | {error, Reason}</name>
      <name since="">delete_group_member(GroupName, UserName, Port, Dir) -> true | {error, Reason}</name>
      <name since="">delete_group_member(GroupName, UserName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Removes a user from a group.</fsummary>
      <type>
        <v>GroupName = string()</v>
        <v>UserName = string()</v>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
	<p><c>delete_group_member/3, delete_group_member/4</c>, and 
	<c>delete_group_member/5</c> each deletes a user from a group. 
	If the group or the user does not exist, 
	this function returns an error, otherwise <c>true</c>.
	When <c>delete_group_member/3</c> is called, the options <c>Port</c> 
	and <c>Dir</c> are mandatory.</p>
      </desc>
    </func>
    
    <func>
      <name since="">delete_user(UserName,Options) -> true | {error, Reason}</name>
      <name since="">delete_user(UserName, Port, Dir) -> true | {error, Reason}</name>
      <name since="">delete_user(UserName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Deletes a user from the user database.</fsummary>
      <type>
        <v>UserName = string()</v>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p><c>delete_user/2, delete_user/3</c>, and <c>delete_user/4</c> 
	each deletes a user from the user database. 
	If the operation is successful, this function returns <c>true</c>. 
	If an error occurs, <c>{error,Reason}</c> is returned. 
	When <c>delete_user/2</c> is called, options <c>Port</c> and <c>Dir</c> 
	are mandatory.</p>
      </desc>
    </func>

    <func>
      <name since="">get_user(UserName,Options) -> {ok, #httpd_user} |{error, Reason}</name>
      <name since="">get_user(UserName, Port, Dir) -> {ok, #httpd_user} | {error, Reason}</name>
      <name since="">get_user(UserName, Address, Port, Dir) -> {ok, #httpd_user} | {error, Reason}</name>
      <fsummary>Returns a user from the user database.</fsummary>
      <type>
        <v>UserName = string()</v>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p><c>get_user/2, get_user/3</c>, and <c>get_user/4</c> each 
	returns an <c>httpd_user</c> record containing the userdata for a 
	specific user. If the user cannot be found, <c>{error, Reason}</c> 
	is returned. When <c>get_user/2</c> is called, options <c>Port</c> and <c>Dir</c> 
	are mandatory.</p>
      </desc>
    </func>

     <func>
      <name since="">list_groups(Options) -> {ok, Groups} | {error, Reason}</name>
      <name since="">list_groups(Port, Dir) -> {ok, Groups} | {error, Reason}</name>
      <name since="">list_groups(Address, Port, Dir) -> {ok, Groups} | {error, Reason}</name>
      <fsummary>Lists all the groups.</fsummary>
      <type>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>Groups = list()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
	<p><c>list_groups/1, list_groups/2</c>, and <c>list_groups/3</c> 
	each lists all the groups available. 
	If there is an error, <c>{error, Reason}</c> is returned. 
	When <c>list_groups/1</c> is called, options <c>Port</c> 
	and <c>Dir</c> are mandatory.</p>
      </desc>
    </func>
   
    <func>
      <name since="">list_group_members(GroupName, Options) -> {ok, Users} | {error, Reason}</name>
      <name since="">list_group_members(GroupName, Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <name since="">list_group_members(GroupName, Address, Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <fsummary>Lists the members of a group.</fsummary>
      <type>
        <v>GroupName = string()</v>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>Users = list()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p><c>list_group_members/2, list_group_members/3</c>, and 
	<c>list_group_members/4</c> each
	lists the members of a specified group. If the group does not 
	exist or there is an error, <c>{error, Reason}</c> is returned.
	When <c>list_group_members/2</c> is called, options <c>Port</c> 
	and <c>Dir</c> are mandatory.</p>
      </desc>
    </func>

     <func>
      <name since="">list_users(Options) -> {ok, Users} | {error, Reason}</name>
      <name since="OTP R14B01">list_users(Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <name since="">list_users(Address, Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <fsummary>Lists users in the user database.</fsummary>
      <type>
        <v>Options = [Option]</v>
        <v>Option = {port,Port} | {addr,Address} | {dir,Directory} | {authPassword,AuthPassword}</v>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>Users = list()</v>
        <v>AuthPassword = string()</v>
        <v>Reason = atom()</v>
      </type>
      <desc>
        <p><c>list_users/1, list_users/2</c>, and <c>list_users/3</c> 
	each returns a list 
	of users in the user database for a specific <c>Port/Dir</c>.
	When <c>list_users/1</c> is called, options <c>Port</c> and <c>Dir</c> 
	are mandatory.</p>
      </desc>
    </func>
    
    <func>
      <name since="">update_password(Port, Dir, OldPassword, NewPassword, NewPassword) -> ok | {error, Reason}</name>
      <name since="">update_password(Address,Port, Dir, OldPassword, NewPassword, NewPassword) -> ok | {error, Reason}</name>
      <fsummary>Changes <c>AuthAcessPassword</c>.</fsummary>
      <type>
        <v>Port = integer()</v>
        <v>Address = {A,B,C,D} | string() | undefined</v>
        <v>Dir = string()</v>
        <v>GroupName = string()</v>
        <v>OldPassword = string()</v>
        <v>NewPassword = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p><c>update_password/5</c> and <c>update_password/6</c> each
	updates <c>AuthAccessPassword</c> for the specified directory. 
	If <c>NewPassword</c> is equal to "NoPassword", no password is required to
	change authorisation data. 
	If <c>NewPassword</c> is equal to "DummyPassword", no changes can be done 
	without changing the password first.</p>
      </desc>
    </func>
  </funcs>

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