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diff --git a/man/systemd-notify.xml b/man/systemd-notify.xml new file mode 100644 index 0000000000..b03492c5c1 --- /dev/null +++ b/man/systemd-notify.xml @@ -0,0 +1,218 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="systemd-notify"> + + <refentryinfo> + <title>systemd-notify</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-notify</refentrytitle> + <manvolnum>1</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-notify</refname> + <refpurpose>Notify service manager about start-up completion and other daemon status changes</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>systemd-notify <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt" rep="repeat">VARIABLE=VALUE</arg></command> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><command>systemd-notify</command> may be + called by daemon scripts to notify the init system + about status changes. It can be used to send arbitrary + information, encoded in an environment-block-like list + of strings. Most importantly it can be used for + start-up completion notification.</para> + + <para>This is mostly just a wrapper around + <function>sd_notify()</function> and makes this + functionality available to shell scripts. For details + see + <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> + + <para>The command line may carry a list of + environment variables to send as part of the status + update.</para> + + <para>Note that systemd will refuse reception of + status updates from this command unless + <varname>NotifyAccess=all</varname> is set for the + service unit this command is called from.</para> + + </refsect1> + + <refsect1> + <title>Options</title> + + <para>The following options are understood:</para> + + <variablelist> + <varlistentry> + <term><option>-h</option></term> + <term><option>--help</option></term> + + <listitem><para>Prints a short help + text and exits.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--version</option></term> + + <listitem><para>Prints a short version + string and exits.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--ready</option></term> + + <listitem><para>Inform the init system + about service start-up + completion. This is equivalent to + <command>systemd-notify + READY=1</command>. For details about + the semantics of this option see + <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--pid=</option></term> + + <listitem><para>Inform the init system + about the main PID of the + daemon. Takes a PID as argument. If + the argument is omitted the PID of the + process that invoked + <command>systemd-notify</command> is + used. This is equivalent to + <command>systemd-notify + MAINPID=$PID</command>. For details + about the semantics of this option see + <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--status=</option></term> + + <listitem><para>Send a free-form + status string for the daemon to the + init systemd. This option takes the + status string as argument. This is + equivalent to <command>systemd-notify + STATUS=...</command>. For details + about the semantics of this option see + <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--booted</option></term> + + <listitem><para>Returns 0 if the + system was booted up with systemd, + non-zero otherwise. If this option is + passed no message is sent. This option + is hence unrelated to the other + options. For details about the + semantics of this option see + <citerefentry><refentrytitle>sd_booted</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--readahead=</option></term> + + <listitem><para>Controls disk + read-ahead operations. The argument + must be a string, and either "cancel", + "done" or "noreplay". For details + about the semantics of this option see + <citerefentry><refentrytitle>sd_readahead</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem> + </varlistentry> + </variablelist> + + </refsect1> + + <refsect1> + <title>Exit status</title> + + <para>On success 0 is returned, a non-zero failure + code otherwise.</para> + </refsect1> + + <refsect1> + <title>Example</title> + + <example> + <title>Start-up Notification and Status Updates</title> + + <para>A simple shell daemon that sends + start-up notifications after having set up its + communication channel. During runtime it sends + further status updates to the init + system:</para> + + <programlisting>#!/bin/bash + +mkfifo /tmp/waldo +systemd-notify --ready --status="Waiting for data..." + +while : ; do + read a < /tmp/waldo + systemd-notify --status="Processing $a" + + # Do something with $a ... + + systemd-notify --status="Waiting for data..." +done</programlisting> + </example> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_booted</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |