mirror of
https://github.com/systemd/systemd-stable.git
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11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
168 lines
5.4 KiB
XML
168 lines
5.4 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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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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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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-->
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<refentry id="systemd-cat"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-cat</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-cat</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-cat</refname>
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<refpurpose>Connect a pipeline or program's output with the journal</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg> <arg>COMMAND</arg> <arg choice="opt" rep="repeat">ARGUMENTS</arg></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg></command>
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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-cat</command> may be used to connect the
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standard input and output of a process to the journal, or as a
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filter tool in a shell pipeline to pass the output the previous
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pipeline element generates to the journal.</para>
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<para>If no parameter is passed, <command>systemd-cat</command>
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will write everything it reads from standard input (stdin) to the
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journal.</para>
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<para>If parameters are passed, they are executed as command line
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with standard output (stdout) and standard error output (stderr)
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connected to the journal, so that all it writes is stored in the
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journal.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>The following options are understood:</para>
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<variablelist>
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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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<varlistentry>
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<term><option>-t</option></term>
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<term><option>--identifier=</option></term>
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<listitem><para>Specify a short string that is used to
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identify the logging tool. If not specified, no identification
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string is written to the journal.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-p</option></term>
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<term><option>--priority=</option></term>
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<listitem><para>Specify the default priority level for the
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logged messages. Pass one of
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<literal>emerg</literal>,
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<literal>alert</literal>,
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<literal>crit</literal>,
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<literal>err</literal>,
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<literal>warning</literal>,
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<literal>notice</literal>,
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<literal>info</literal>,
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<literal>debug</literal>, or a
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value between 0 and 7 (corresponding to the same named
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levels). These priority values are the same as defined by
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<citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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Defaults to <literal>info</literal>. Note that this simply
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controls the default, individual lines may be logged with
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different levels if they are prefixed accordingly. For details,
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see <option>--level-prefix=</option> below.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--level-prefix=</option></term>
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<listitem><para>Controls whether lines read are parsed for
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syslog priority level prefixes. If enabled (the default), a
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line prefixed with a priority prefix such as
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<literal><5></literal> is logged at priority 5
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(<literal>notice</literal>), and similar for the other
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priority levels. Takes a boolean argument.</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>Exit status</title>
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<para>On success, 0 is returned, a non-zero failure code
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otherwise.</para>
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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>Invoke a program</title>
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<para>This calls <filename noindex='true'>/bin/ls</filename>
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with standard output and error connected to the journal:</para>
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<programlisting># systemd-cat ls</programlisting>
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</example>
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<example>
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<title>Usage in a shell pipeline</title>
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<para>This builds a shell pipeline also invoking
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<filename>/bin/ls</filename> and writes the output it generates
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to the journal:</para>
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<programlisting># ls | systemd-cat</programlisting>
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</example>
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<para>Even though the two examples have very similar effects the
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first is preferable since only one process is running at a time,
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and both stdout and stderr are captured while in the second
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example, only stdout is captured.</para>
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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>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>logger</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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