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<?xml version="1.0" encoding="latin1" ?>
<!DOCTYPE erlref SYSTEM "erlref.dtd">

<erlref>
  <header>
    <copyright>
      <year>1997</year><year>2009</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      The contents of this file are subject to the Erlang Public License,
      Version 1.1, (the "License"); you may not use this file except in
      compliance with the License. You should have received a copy of the
      Erlang Public License along with this software. If not, it can be
      retrieved online at http://www.erlang.org/.
    
      Software distributed under the License is distributed on an "AS IS"
      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
      the License for the specific language governing rights 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>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 as well as mnesia databases. </p>
  </description>
  <funcs>
    <func>
      <name>add_user(UserName, Options) ->  true| {error, Reason}</name>
      <name>add_user(UserName, Password, UserData, Port, Dir) -> true | {error, Reason}</name>
      <name>add_user(UserName, Password, UserData, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Add 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>
        <marker id="user_api"></marker>
        <marker id="add_user"></marker>
        <p><c>add_user/2, add_user/5</c> and <c>add_user/6</c> 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 the Password, UserData Port and Dir options is mandatory.</p>
      </desc>
    </func>
    <func>
      <name>delete_user(UserName,Options)  -> true | {error, Reason}</name>
      <name>delete_user(UserName, Port, Dir) -> true | {error, Reason}</name>
      <name>delete_user(UserName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Delete 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>
        <marker id="delete_user"></marker>
        <p><c>delete_user/2, delete_user/3</c> and <c>delete_user/4</c> 
          deletes a user 
          from the user database. If the operation is succesfull, this 
          function returns <c>true</c>. If an error occurs, 
          <c>{error,Reason}</c> is returned. When <c>delete_user/2</c> is
          called the Port and Dir options are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>get_user(UserName,Options) -> {ok, #httpd_user} |{error, Reason}</name>
      <name>get_user(UserName, Port, Dir) -> {ok, #httpd_user} | {error, Reason}</name>
      <name>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>
        <marker id="get_user"></marker>
        <p><c>get_user/2, get_user/3</c> and <c>get_user/4</c> returns a 
          <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 the Port and Dir 
          options are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>list_users(Options) -> {ok, Users} | {error, Reason} &lt;name>list_users(Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <name>list_users(Address, Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <fsummary>List 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>
        <marker id="list_users"></marker>
        <p><c>list_users/1, list_users/2</c> and <c>list_users/3</c> returns a list 
          of users in the user database for a specific <c>Port/Dir</c>.
          When <c>list_users/1</c> is called the Port and Dir 
          options are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>add_group_member(GroupName, UserName, Options) -> true | {error, Reason}</name>
      <name>add_group_member(GroupName, UserName, Port, Dir) -> true | {error, Reason}</name>
      <name>add_group_member(GroupName, UserName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Add 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>
        <marker id="add_group_member"></marker>
        <p><c>add_group_member/3, add_group_member/4</c> and <c>add_group_member/5</c> 
          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 the Port and Dir options are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>delete_group_member(GroupName, UserName, Options) -> true | {error, Reason}</name>
      <name>delete_group_member(GroupName, UserName, Port, Dir) -> true | {error, Reason}</name>
      <name>delete_group_member(GroupName, UserName, Address, Port, Dir) -> true | {error, Reason}</name>
      <fsummary>Remove 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>
        <marker id="delete_group_member"></marker>
        <p><c>delete_group_member/3, delete_group_member/4</c> and <c>delete_group_member/5</c>  deletes a user from a group. 
          If the group or the user does not exist, 
          this function returns an error, otherwise it returns <c>true</c>.
          When <c>delete_group_member/3</c> is called the Port and Dir options
          are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>list_group_members(GroupName, Options) -> {ok, Users} | {error, Reason}</name>
      <name>list_group_members(GroupName, Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <name>list_group_members(GroupName, Address, Port, Dir) -> {ok, Users} | {error, Reason}</name>
      <fsummary>List 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>
        <marker id="list_group_members"></marker>
        <p><c>list_group_members/2, list_group_members/3</c> and <c>list_group_members/4</c> 
          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 the Port and Dir options
          are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>list_groups(Options) -> {ok, Groups} | {error, Reason}</name>
      <name>list_groups(Port, Dir) -> {ok, Groups} | {error, Reason}</name>
      <name>list_groups(Address, Port, Dir) -> {ok, Groups} | {error, Reason}</name>
      <fsummary>List 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>
        <marker id="list_groups"></marker>
        <p><c>list_groups/1, list_groups/2</c> and <c>list_groups/3</c> lists all 
          the groups available. If there is an error, <c>{error, Reason}</c> 
          is returned. When <c>list_groups/1</c> is called the Port and Dir options
          are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>delete_group(GroupName, Options) -> true | {error,Reason} &lt;name>delete_group(GroupName, Port, Dir) -> true | {error, Reason}</name>
      <name>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>
        <marker id="delete_group"></marker>
        <p><c>delete_group/2, delete_group/3</c> and <c>delete_group/4</c> 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 the 
          Port and Dir options are mandatory.</p>
      </desc>
    </func>
    <func>
      <name>update_password(Port, Dir, OldPassword, NewPassword, NewPassword) -> ok | {error, Reason}</name>
      <name>update_password(Address,Port, Dir, OldPassword, NewPassword, NewPassword) -> ok | {error, Reason}</name>
      <fsummary>Change the AuthAcessPassword</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>
        <marker id="update_password"></marker>
        <p><c>update_password/5</c> and <c>update_password/6</c> Updates the AuthAccessPassword
          for the specified directory. If NewPassword is equal to "NoPassword" no password is requires to
          change authorisation data. If NewPassword is equal to "DummyPassword" no changes can be done 
          without changing the password first.</p>
      </desc>
    </func>
  </funcs>

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