mirror of
https://github.com/systemd/systemd.git
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185 lines
7.8 KiB
XML
185 lines
7.8 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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-->
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<refentry id="systemd-socket-activate"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-socket-activate</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-socket-activate</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-socket-activate</refname>
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<refpurpose>Test socket activation of daemons</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>systemd-socket-activate</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="plain"><replaceable>daemon</replaceable></arg>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd-socket-activate</command> may be used to launch a socket-activated service program from the
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command line for testing purposes. It may also be used to launch individual instances of the service program per
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connection.
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</para>
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<para>The daemon to launch and its options should be specified
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after options intended for <command>systemd-socket-activate</command>.
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</para>
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<para>If the <option>--inetd</option> option is given, the socket file descriptor will be used as the standard
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input and output of the launched process. Otherwise, standard input and output will be inherited, and sockets will
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be passed through file descriptors 3 and higher. Sockets passed through <varname>$LISTEN_FDS</varname> to
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<command>systemd-socket-activate</command> will be passed through to the daemon, in the original positions. Other sockets
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specified with <option>--listen=</option> will use consecutive descriptors. By default,
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<command>systemd-socket-activate</command> listens on a stream socket, use <option>--datagram</option> and
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<option>--seqpacket</option> to listen on datagram or sequential packet sockets instead (see below).
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</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<variablelist>
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<varlistentry>
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<term><option>-l <replaceable>address</replaceable></option></term>
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<term><option>--listen=<replaceable>address</replaceable></option></term>
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<listitem><para>Listen on this <replaceable>address</replaceable>.
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Takes a string like <literal>2000</literal> or
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<literal>127.0.0.1:2001</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-a</option></term>
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<term><option>--accept</option></term>
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<listitem><para>Launch an instance of the service program for each connection and pass the connection
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socket.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-d</option></term>
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<term><option>--datagram</option></term>
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<listitem><para>Listen on a datagram socket (<constant>SOCK_DGRAM</constant>), instead of a stream socket
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(<constant>SOCK_STREAM</constant>). May not be combined with <option>--seqpacket</option>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--seqpacket</option></term>
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<listitem><para>Listen on a sequential packet socket (<constant>SOCK_SEQPACKET</constant>), instead of a stream
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socket (<constant>SOCK_STREAM</constant>). May not be combined with
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<option>--datagram</option>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--inetd</option></term>
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<listitem><para>Use the inetd protocol for passing file descriptors, i.e. as standard input and standard
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output, instead of the new-style protocol for passing file descriptors using <varname>$LISTEN_FDS</varname>
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(see above).</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-E <replaceable>VAR</replaceable><optional>=<replaceable>VALUE</replaceable></optional></option></term>
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<term><option>--setenv=<replaceable>VAR</replaceable><optional>=<replaceable>VALUE</replaceable></optional></option></term>
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<listitem><para>Add this variable to the environment of the
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launched process. If <replaceable>VAR</replaceable> is
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followed by <literal>=</literal>, assume that it is a
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variable–value pair. Otherwise, obtain the value from the
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environment of <command>systemd-socket-activate</command> itself.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--fdname=</option><replaceable>NAME</replaceable><optional>:<replaceable>NAME</replaceable>…</optional></term>
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<listitem><para>Specify names for the file descriptors passed. This is equivalent to setting
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<varname>FileDescriptorName=</varname> in socket unit files, and enables use of
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<citerefentry><refentrytitle>sd_listen_fds_with_names</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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Multiple entries may be specifies using separate options or by separating names with colons
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(<literal>:</literal>) in one option. In case more names are given than descriptors, superfluous ones will be
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ignored. In case less names are given than descriptors, the remaining file descriptors will be unnamed.
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</para></listitem>
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</varlistentry>
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Environment variables</title>
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<variablelist class='environment-variables'>
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<varlistentry>
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<term><varname>$LISTEN_FDS</varname></term>
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<term><varname>$LISTEN_PID</varname></term>
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<term><varname>$LISTEN_FDNAMES</varname></term>
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<listitem><para>See
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<citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>$SYSTEMD_LOG_TARGET</varname></term>
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<term><varname>$SYSTEMD_LOG_LEVEL</varname></term>
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<term><varname>$SYSTEMD_LOG_COLOR</varname></term>
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<term><varname>$SYSTEMD_LOG_LOCATION</varname></term>
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<listitem><para>Same as in
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<example>
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<title>Run an echo server on port 2000</title>
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<programlisting>$ systemd-socket-activate -l 2000 --inetd -a cat</programlisting>
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</example>
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<example>
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<title>Run a socket-activated instance of <citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry></title>
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<programlisting>$ systemd-socket-activate -l 19531 /usr/lib/systemd/systemd-journal-gatewayd</programlisting>
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</example>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_listen_fds_with_names</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>cat</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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