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authorLuke Shumaker <lukeshu@lukeshu.com>2017-05-10 15:54:51 -0400
committerLuke Shumaker <lukeshu@lukeshu.com>2017-05-10 15:54:51 -0400
commit51bf8f984974c8d60e6576b623b4ea7e0e20a470 (patch)
tree3ff14638977c50bffd735a6628842a675fc1710b /src/grp-journal/systemd-cat/systemd-cat.xml
parent88cdc57b277ec240d4c5ddfbbfaddfed2b2408c1 (diff)
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+<?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 2012 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-cat"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>systemd-cat</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-cat</refentrytitle>
+ <manvolnum>1</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-cat</refname>
+ <refpurpose>Connect a pipeline or program's output with the journal</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg> <arg>COMMAND</arg> <arg choice="opt" rep="repeat">ARGUMENTS</arg></command>
+ </cmdsynopsis>
+ <cmdsynopsis>
+ <command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg></command>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>systemd-cat</command> may be used to connect the
+ standard input and output of a process to the journal, or as a
+ filter tool in a shell pipeline to pass the output the previous
+ pipeline element generates to the journal.</para>
+
+ <para>If no parameter is passed, <command>systemd-cat</command>
+ will write everything it reads from standard input (stdin) to the
+ journal.</para>
+
+ <para>If parameters are passed, they are executed as command line
+ with standard output (stdout) and standard error output (stderr)
+ connected to the journal, so that all it writes is stored in the
+ journal.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>The following options are understood:</para>
+
+ <variablelist>
+ <xi:include href="standard-options.xml" xpointer="help" />
+ <xi:include href="standard-options.xml" xpointer="version" />
+
+ <varlistentry>
+ <term><option>-t</option></term>
+ <term><option>--identifier=</option></term>
+
+ <listitem><para>Specify a short string that is used to
+ identify the logging tool. If not specified, no identification
+ string is written to the journal.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-p</option></term>
+ <term><option>--priority=</option></term>
+
+ <listitem><para>Specify the default priority level for the
+ logged messages. Pass one of
+ <literal>emerg</literal>,
+ <literal>alert</literal>,
+ <literal>crit</literal>,
+ <literal>err</literal>,
+ <literal>warning</literal>,
+ <literal>notice</literal>,
+ <literal>info</literal>,
+ <literal>debug</literal>, or a
+ value between 0 and 7 (corresponding to the same named
+ levels). These priority values are the same as defined by
+ <citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
+ Defaults to <literal>info</literal>. Note that this simply
+ controls the default, individual lines may be logged with
+ different levels if they are prefixed accordingly. For details,
+ see <option>--level-prefix=</option> below.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--level-prefix=</option></term>
+
+ <listitem><para>Controls whether lines read are parsed for
+ syslog priority level prefixes. If enabled (the default), a
+ line prefixed with a priority prefix such as
+ <literal>&lt;5&gt;</literal> is logged at priority 5
+ (<literal>notice</literal>), and similar for the other
+ priority levels. Takes a boolean argument.</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>Examples</title>
+
+ <example>
+ <title>Invoke a program</title>
+
+ <para>This calls <filename noindex='true'>/bin/ls</filename>
+ with standard output and error connected to the journal:</para>
+
+ <programlisting># systemd-cat ls</programlisting>
+ </example>
+
+ <example>
+ <title>Usage in a shell pipeline</title>
+
+ <para>This builds a shell pipeline also invoking
+ <filename>/bin/ls</filename> and writes the output it generates
+ to the journal:</para>
+
+ <programlisting># ls | systemd-cat</programlisting>
+ </example>
+
+ <para>Even though the two examples have very similar effects the
+ first is preferable since only one process is running at a time,
+ and both stdout and stderr are captured while in the second
+ example, only stdout is captured.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>logger</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>