Lennart Poettering
0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
164 lines
5.3 KiB
XML
164 lines
5.3 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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-->
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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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