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Postgres documentation
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<refentry id="APP-CREATEUSER">
 <refmeta>
  <refentrytitle id="APP-CREATEUSER-TITLE">
   <application>createuser</application>
  </refentrytitle>
  <refmiscinfo>Application</refmiscinfo>
 </refmeta>
 <refnamediv>
  <refname>
   <application>createuser</application>
  </refname>
  <refpurpose>
   Create a new <productname>PostgreSQL</productname> user
  </refpurpose>
 </refnamediv>
 <refsynopsisdiv>
  <refsynopsisdivinfo>
   <date>1999-11-07</date>
  </refsynopsisdivinfo>

  <synopsis>
createuser [ <replaceable class="parameter">options</replaceable> ] [ <replaceable class="parameter">username</replaceable> ]
  </synopsis>

  <refsect2 id="R2-APP-CREATEUSER-1">
   <refsect2info>
    <date>1999-11-07</date>
   </refsect2info>
   <title>
    Inputs
   </title>
   <para>

    <variablelist>
     <varlistentry>
      <term>-h, --host <replaceable class="parameter">host</replaceable></term>
      <listitem>
       <para>
	Specifies the hostname of the machine on which the 
	<application>postmaster</application>
	is running.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-p, --port <replaceable class="parameter">port</replaceable></term>
      <listitem>
       <para>
	Specifies the Internet TCP/IP port or local Unix domain socket file 
	extension on which the <application>postmaster</application>
	is listening for connections.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-e, --echo</term>
      <listitem>
       <para>
        Echo the queries that <application>createdb</application> generates
	and sends to the backend.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-q, --quiet</term>
      <listitem>
       <para>
        Do not display a response.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-d, --createdb</term>
      <listitem>
       <para>
	Allows the new user to create databases.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-D, --no-createdb</term>
      <listitem>
       <para>
	Forbids the new user to create databases.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-a, --adduser</term>
      <listitem>
       <para>
	Allows the new user to create other users.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-A, --no-adduser</term>
      <listitem>
       <para>
	Forbids the new user to create other users.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-P, --pwprompt</term>
      <listitem>
       <para>
       If given, <application>createuser</application> will issue a prompt for
       the password of the new user. This is not necessary if you do not plan
       on using password authentication.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term>-i, --sysid <replaceable class="parameter">uid</replaceable></term>
      <listitem>
       <para>
       Allows you to pick a non-default user id for the new user. This is not
       necessary, but some people like it.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term><replaceable class="parameter">username</replaceable></term>
      <listitem>
       <para>
	Specifies the name of the <productname>PostgreSQL</productname> user to be created. 
	This name must be unique among all <productname>PostgreSQL</productname> users.
       </para>
      </listitem>
     </varlistentry>  
    </variablelist>

    You will be prompted for a name and other missing information if it is not
    specified on the command line.
    </para>

    <para>
    The options <literal>-h</literal>, <literal>-p</literal>, and <literal>-e</literal>,
    are passed on literally to <xref linkend="APP-PSQL" endterm="APP-PSQL-title">. The
    <application>psql</application> options <literal>-U</literal> and <literal>-W</literal>
    are available as well, but their use can be confusing in this context.
   </para>
  </refsect2>

  <refsect2 id="R2-APP-CREATEUSER-2">
   <refsect2info>
    <date>1999-11-07</date>
   </refsect2info>
   <title>
    Outputs
   </title>
   <para>
    <variablelist>
     <varlistentry>
      <term><computeroutput>CREATE USER</computeroutput></term>
      <listitem>
       <para>
        All is well.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry>
      <term><computeroutput>createuser: creation of user "<replaceable class="parameter">username</replaceable>" failed</computeroutput></term>
      <listitem>
       <para>
        Something went wrong. The user was not created.
       </para>
      </listitem>
     </varlistentry>

    </variablelist>

    If there is an error condition, the backend error message will be displayed.
    See <xref linkend="SQL-CREATEUSER" endterm="SQL-CREATEUSER-title">
    and <xref linkend="APP-PSQL" endterm="APP-PSQL-title"> for possibilities.
   </para>
  </refsect2>
 </refsynopsisdiv>
  
 <refsect1 id="R1-APP-CREATEUSER-1">
  <refsect1info>
   <date>1998-11-07</date>
  </refsect1info>
  <title>
   Description
  </title>
  <para>
   <application>createuser</application> creates a 
   new <productname>PostgreSQL</productname> user.  
   Only users with <literal>usesuper</literal> set in
   the <literal>pg_shadow</literal> class can create 
   new <productname>Postgres</productname> users.
  </para>

  <para>
   <application>createuser</application> is a shell script wrapper around the
   <acronym>SQL</acronym> command
   <xref linkend="SQL-CREATEUSER" endterm="SQL-CREATEUSER-title"> via
   the <productname>PostgreSQL</productname> interactive terminal
   <xref linkend="APP-PSQL" endterm="APP-PSQL-title">. Thus, there is nothing
   special about creating users via this or other methods. This means
   that the <application>psql</application> must be found by the script and that
   a database server is running at the targeted host. Also, any default
   settings and environment variables available to <application>psql</application>
   and the <application>libpq</application> front-end library do apply.
  </para>

 </refsect1>


 <refsect1 id="R1-APP-CREATEUSER-2">
  <refsect1info>
   <date>1999-11-07</date>
  </refsect1info>
  <title>
   Usage
  </title>
  <para>
   To create a user <literal>joe</literal>
   on the default database server:

   <programlisting>
$ <userinput>createuser joe</userinput>
Is the new user allowed to create databases? (y/n) <userinput>n</userinput>
Shall the new user be allowed to create more new users? (y/n) <userinput>n</userinput>
CREATE USER
   </programlisting>
  </para>

  <para>
   To create the same user <literal>joe</literal>
   using the postmaster on host eden, port 5000, avoiding
   the prompts and taking a look at the underlying query:

   <programlisting>
$ <userinput>createuser -p 5000 -h eden -D -A -e joe</userinput>
CREATE USER "joe" NOCREATEDB NOCREATEUSER
CREATE USER
   </programlisting>
  </para>
 </refsect1>

</refentry>

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