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<!--
SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
nm-online(1) manual page
Copyright 2010 - 2016 Red Hat, Inc.
-->
<refentry id='nm-online'>
<refentryinfo>
<title>nm-online</title>
<author>NetworkManager developers</author>
</refentryinfo>
<refmeta>
<refentrytitle>nm-online</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo class="source">NetworkManager</refmiscinfo>
<refmiscinfo class="manual">General Commands Manual</refmiscinfo>
<refmiscinfo class="version">&NM_VERSION;</refmiscinfo>
</refmeta>
<refnamediv>
<refname>nm-online</refname>
<refpurpose>ask NetworkManager whether the network is connected</refpurpose>
</refnamediv>
<refsynopsisdiv id='synopsis'>
<cmdsynopsis>
<command>nm-online</command>
<arg choice="opt" rep="repeat"><replaceable>OPTIONS</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id='description'><title>Description</title>
<para><command>nm-online</command> is a utility to find out whether we are
online. It is done by asking NetworkManager about its status. When run,
<command>nm-online</command> waits until NetworkManager reports an active
connection, or specified timeout expires. On exit, the returned status code
should be checked (see the return codes below).</para>
<para>This tool is not very useful to call directly. It is however used by
<literal>NetworkManager-wait-online.service</literal> with
<literal>--wait-for-startup</literal> argument
(see <link linkend='NetworkManager-wait-online.service'><citerefentry><refentrytitle>NetworkManager-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></link>).
</para>
<para>By default, connections have the <literal>ipv4.may-fail</literal> and
<literal>ipv6.may-fail</literal> properties set to <literal>yes</literal>;
this means that NetworkManager waits for one of the two address families to
complete configuration before considering the connection activated. If you
need a specific address family configured before
<literal>network-online.target</literal> is reached, set the corresponding
<literal>may-fail</literal> property to <literal>no</literal>.</para>
</refsect1>
<refsect1 id='options'><title>Options</title>
<variablelist>
<varlistentry>
<term><group choice='plain'>
<arg choice='plain'><option>-h</option></arg>
<arg choice='plain'><option>--help</option></arg>
</group></term>
<listitem>
<para>Print help information.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><group choice='plain'>
<arg choice='plain'><option>-q</option></arg>
<arg choice='plain'><option>--quiet</option></arg>
</group></term>
<listitem>
<para>Don't print anything.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><group choice='plain'>
<arg choice='plain'><option>-s</option></arg>
<arg choice='plain'><option>--wait-for-startup</option></arg>
</group></term>
<listitem>
<para>Wait for NetworkManager startup to complete, rather than waiting for
network connectivity specifically. Startup is considered complete once
NetworkManager has activated (or attempted to activate) every auto-activate
connection which is available given the current network state. This corresponds
to the moment when NetworkManager logs <literal>"startup complete"</literal>.
This mode is generally only useful at boot time. After startup has completed,
<command>nm-online -s</command> will just return immediately, regardless of the
current network state.</para>
<para>There are various ways to affect when startup complete is reached.
For details see
<link linkend='NetworkManager-wait-online.service'><citerefentry><refentrytitle>NetworkManager-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></link>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<group choice='plain'>
<arg choice='plain'><option>-t</option></arg>
<arg choice='plain'><option>--timeout</option></arg>
</group>
<arg choice='plain'><replaceable>seconds</replaceable></arg>
</term>
<listitem>
<para>Time to wait for a connection, in seconds. If the option is not provided,
the environment variable <literal>NM_ONLINE_TIMEOUT</literal> is honored.
The default timeout is 30 seconds.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><group choice='plain'>
<arg choice='plain'><option>-x</option></arg>
<arg choice='plain'><option>--exit</option></arg>
</group></term>
<listitem>
<para>Exit immediately if NetworkManager is not running or connecting.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='exit_status'><title>Exit Status</title>
<para><command>nm-online</command> exits with status 0 if it succeeds, a value
greater than 0 is returned if an error occurs.</para>
<variablelist spacing='compact' termlength='3'>
<varlistentry>
<term><errorcode>0</errorcode></term>
<listitem>
<para>Success – already online or connection established within given timeout.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>1</errorcode></term>
<listitem>
<para>Offline or not online within given timeout.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>2</errorcode></term>
<listitem>
<para>Unknown or unspecified error.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='see_also'><title>See Also</title>
<para><link linkend='nmcli'><citerefentry><refentrytitle>nmcli</refentrytitle><manvolnum>1</manvolnum></citerefentry></link>,
<link linkend='NetworkManager'><citerefentry><refentrytitle>NetworkManager</refentrytitle><manvolnum>8</manvolnum></citerefentry></link>,
<link linkend='NetworkManager-wait-online.service'><citerefentry><refentrytitle>NetworkManager-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></link>.
</para>
</refsect1>
</refentry>
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