Adding upstream version 241.upstream/241upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 185 insertions, 0 deletions

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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">
+
+<!--
+  SPDX-License-Identifier: LGPL-2.1+
+-->
+
+<refentry id="systemd-escape"
+    xmlns:xi="http://www.w3.org/2001/XInclude">
+
+  <refentryinfo>
+    <title>systemd-escape</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>systemd-escape</refentrytitle>
+    <manvolnum>1</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>systemd-escape</refname>
+    <refpurpose>Escape strings for usage in systemd unit names</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>systemd-escape</command>
+      <arg choice="opt" rep="repeat">OPTIONS</arg>
+      <arg choice="opt" rep="repeat">STRING</arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><command>systemd-escape</command> may be used to escape
+    strings for inclusion in systemd unit names. The command may be
+    used to escape and to undo escaping of strings.</para>
+
+    <para>The command takes any number of strings on the command line,
+    and will process them individually, one after another. It will
+    output them separated by spaces to stdout.</para>
+
+    <para>By default, this command will escape the strings passed,
+    unless <option>--unescape</option> is passed which results in the
+    inverse operation being applied. If <option>--mangle</option> is given, a
+    special mode of escaping is applied instead, which assumes the
+    string is already escaped but will escape everything that
+    appears obviously non-escaped.</para>
+
+    <para>For details on the escaping and unescaping algorithms see the relevant section in
+    <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Options</title>
+
+    <para>The following options are understood:</para>
+
+    <variablelist>
+      <varlistentry>
+        <term><option>--suffix=</option></term>
+
+        <listitem><para>Appends the specified unit type suffix to the
+        escaped string. Takes one of the unit types supported by
+        systemd, such as <literal>service</literal> or
+        <literal>mount</literal>. May not be used in conjunction with
+        <option>--template=</option>, <option>--unescape</option> or
+        <option>--mangle</option>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--template=</option></term>
+
+        <listitem><para>Inserts the escaped strings in a unit name
+        template. Takes a unit name template such as
+        <filename>foobar@.service</filename>. With
+        <option>--unescape</option>, expects instantiated unit names
+        for this template and extracts and unescapes just the instance
+        part. May not be used in conjunction with
+        <option>--suffix=</option>,
+        <option>--instance</option> or
+        <option>--mangle</option>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--path</option></term>
+        <term><option>-p</option></term>
+
+        <listitem><para>When escaping or unescaping a string, assume it refers to a file system path. This eliminates
+        leading, trailing or duplicate <literal>/</literal> characters and rejects <literal>.</literal> and
+        <literal>..</literal> path components. This is particularly useful for generating strings suitable for
+        unescaping with the <literal>%f</literal> specifier in unit files, see
+        <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+        </para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--unescape</option></term>
+        <term><option>-u</option></term>
+
+        <listitem><para>Instead of escaping the specified strings,
+        undo the escaping, reversing the operation. May not be used in
+        conjunction with <option>--suffix=</option> or
+        <option>--mangle</option>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--mangle</option></term>
+        <term><option>-m</option></term>
+
+        <listitem><para>Like <option>--escape</option>, but only
+        escape characters that are obviously not escaped yet, and
+        possibly automatically append an appropriate unit type suffix
+        to the string. May not be used in conjunction with
+        <option>--suffix=</option>, <option>--template=</option> or
+        <option>--unescape</option>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><option>--instance</option></term>
+
+        <listitem><para>With <option>--unescape</option>, unescape
+        and print only the instance part of an instantiated unit name
+        template. Results in an error for an uninstantiated template
+        like <filename>ssh@.service</filename> or a non-template name
+        like <filename>ssh.service</filename>.
+        Must be used in conjunction with <option>--unescape</option>
+        and may not be used in conjunction with
+        <option>--template</option>.</para></listitem>
+      </varlistentry>
+
+      <xi:include href="standard-options.xml" xpointer="help" />
+      <xi:include href="standard-options.xml" xpointer="version" />
+    </variablelist>
+
+  </refsect1>
+
+  <refsect1>
+    <title>Examples</title>
+
+    <para>To escape a single string:</para>
+    <programlisting>$ systemd-escape 'Hallöchen, Meister'
+Hall\xc3\xb6chen\x2c\x20Meister</programlisting>
+
+    <para>To undo escaping on a single string:</para>
+    <programlisting>$ systemd-escape -u 'Hall\xc3\xb6chen\x2c\x20Meister'
+Hallöchen, Meister</programlisting>
+
+    <para>To generate the mount unit for a path:</para>
+    <programlisting>$ systemd-escape -p --suffix=mount "/tmp//waldi/foobar/"
+tmp-waldi-foobar.mount</programlisting>
+
+    <para>To generate instance names of three strings:</para>
+    <programlisting>$ systemd-escape --template=systemd-nspawn@.service 'My Container 1' 'containerb' 'container/III'
+systemd-nspawn@My\x20Container\x201.service systemd-nspawn@containerb.service systemd-nspawn@container-III.service</programlisting>
+
+    <para>To extract the instance part of an instantiated unit:</para>
+    <programlisting>$ systemd-escape -u --instance 'systemd-nspawn@My\x20Container\x201.service'
+My Container 1</programlisting>
+
+    <para>To extract the instance part of an instance of a particular template:</para>
+    <programlisting>$ systemd-escape -u --template=systemd-nspawn@.service 'systemd-nspawn@My\x20Container\x201.service'
+My Container 1</programlisting>
+  </refsect1>
+
+  <refsect1>
+    <title>Exit status</title>
+
+    <para>On success, 0 is returned, a non-zero failure code
+    otherwise.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>See Also</title>
+    <para>
+      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>