[sojka/lightdm.git] / doc / tmpl / greeter.sgml

<!-- ##### SECTION Title ##### -->
LdmGreeter

<!-- ##### SECTION Short_Description ##### -->
LightDM greeter object

<!-- ##### SECTION Long_Description ##### -->
<para>
#LdmGreeter is an object that manages the connection to the LightDM server and provides common greeter functionality.
</para>
<para>
To connect to the display manager instanciate a #LdmGreeter object from inside the greeter process:
<example>
<title>Connecting to the display manager</title>
<programlisting><![CDATA[
LdmGreeter *greeter = ldm_greeter_new ();
if (!ldm_greeter_connect (LDM_GREETER (greeter))) {
    // Log an error
    exit (0);
}
]]></programlisting>
</example>
Information on how to connect to the display manager is passed using environment variables.
</para>
<para>
Once connected, start an authentication conversation like this:
<example>
<title>Example Authorization Conversation</title>
<programlisting><![CDATA[
static void show_prompt_cb (LdmGreeter *greeter, const char *text)
{
    // Show the user the message and prompt for some response
    gchar *secret = prompt_user (text);

    // Give the result to the user
    ldm_greeter_provide_secret (greeter, secret);
}

static void authentication_complete_cb (LdmGreeter *greeter)
{
    if (ldm_greeter_get_is_authenticated (greeter)) {
        // Log in to this session.
        ldm_greeter_login (greeter, ldm_greeter_get_authentication_user (greeter), ldm_greeter_get_default_session (greeter));
    }
    else {
        // Display a warning and reset the greeter
        reset_login_screen ();
    }
}

static void quit_cb (LdmGreeter *greeter)
{
    // Clean up
    // ...
    
    exit (0);
}

g_object_connect (G_OBJECT (greeter), "show-prompt", G_CALLBACK (show_prompt_cb), NULL);
g_object_connect (G_OBJECT (greeter), "authentication-complete", G_CALLBACK (authentication_complete_cb), NULL);
g_object_connect (G_OBJECT (greeter), "quit", G_CALLBACK (quit_cb), NULL);
]]></programlisting>
</example>
</para>

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<para>

</para>

<!-- ##### SECTION Stability_Level ##### -->


<!-- ##### SECTION Image ##### -->


<!-- ##### STRUCT LdmGreeter ##### -->
<para>

</para>


<!-- ##### SIGNAL LdmGreeter::authentication-complete ##### -->
<para>

</para>

@ldmgreeter: the object which received the signal.

<!-- ##### SIGNAL LdmGreeter::quit ##### -->
<para>

</para>

@ldmgreeter: the object which received the signal.

<!-- ##### SIGNAL LdmGreeter::show-error ##### -->
<para>

</para>

@ldmgreeter: the object which received the signal.
@arg1: 

<!-- ##### SIGNAL LdmGreeter::show-message ##### -->
<para>

</para>

@ldmgreeter: the object which received the signal.
@arg1: 

<!-- ##### SIGNAL LdmGreeter::show-prompt ##### -->
<para>

</para>

@ldmgreeter: the object which received the signal.
@arg1: 

<!-- ##### SIGNAL LdmGreeter::timed-login ##### -->
<para>

</para>

@ldmgreeter: the object which received the signal.
@arg1: 

<!-- ##### ARG LdmGreeter:authentication-user ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:can-hibernate ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:can-restart ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:can-shutdown ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:can-suspend ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:default-session ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:hostname ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:is-authenticated ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:layout ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:login-delay ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:num-users ##### -->
<para>

</para>

<!-- ##### ARG LdmGreeter:timed-login-user ##### -->
<para>

</para>

<!-- ##### FUNCTION ldm_greeter_new ##### -->
<para>

</para>

@void: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_connect ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_hostname ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_theme ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_string_property ##### -->
<para>

</para>

@greeter: 
@name: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_integer_property ##### -->
<para>

</para>

@greeter: 
@name: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_boolean_property ##### -->
<para>

</para>

@greeter: 
@name: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_num_users ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_users ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_default_language ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_languages ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_default_layout ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_layouts ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_layout ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_set_layout ##### -->
<para>

</para>

@greeter: 
@layout: 


<!-- ##### FUNCTION ldm_greeter_get_sessions ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_default_session ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_timed_login_user ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_timed_login_delay ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_cancel_timed_login ##### -->
<para>

</para>

@greeter: 


<!-- ##### FUNCTION ldm_greeter_start_authentication ##### -->
<para>

</para>

@greeter: 
@username: 


<!-- ##### FUNCTION ldm_greeter_provide_secret ##### -->
<para>

</para>

@greeter: 
@secret: 


<!-- ##### FUNCTION ldm_greeter_cancel_authentication ##### -->
<para>

</para>

@greeter: 


<!-- ##### FUNCTION ldm_greeter_get_is_authenticated ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_get_authentication_user ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_login ##### -->
<para>

</para>

@greeter: 
@username: 
@session: 
@language: 


<!-- ##### FUNCTION ldm_greeter_get_can_suspend ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_suspend ##### -->
<para>

</para>

@greeter: 


<!-- ##### FUNCTION ldm_greeter_get_can_hibernate ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_hibernate ##### -->
<para>

</para>

@greeter: 


<!-- ##### FUNCTION ldm_greeter_get_can_restart ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_restart ##### -->
<para>

</para>

@greeter: 


<!-- ##### FUNCTION ldm_greeter_get_can_shutdown ##### -->
<para>

</para>

@greeter: 
@Returns: 


<!-- ##### FUNCTION ldm_greeter_shutdown ##### -->
<para>

</para>

@greeter: