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diff --git a/src/systemd-mount/systemd-mount.xml b/src/systemd-mount/systemd-mount.xml new file mode 100644 index 0000000000..06b7c85bd8 --- /dev/null +++ b/src/systemd-mount/systemd-mount.xml @@ -0,0 +1,295 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!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 2016 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-mount" + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>systemd-mount</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-mount</refentrytitle> + <manvolnum>1</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-mount</refname> + <refpurpose>Establish a mount or auto-mount point transiently</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>systemd-mount</command> + <arg choice="opt" rep="repeat"><replaceable>OPTIONS</replaceable></arg> + <arg choice="plain"><replaceable>WHAT</replaceable></arg> + <arg choice="opt"><replaceable>WHERE</replaceable></arg> + </cmdsynopsis> + <cmdsynopsis> + <command>systemd-mount</command> + <arg choice="opt" rep="repeat"><replaceable>OPTIONS</replaceable></arg> + <arg choice="plain"><option>--list</option></arg> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><command>systemd-mount</command> may be used to create and start a transient <filename>.mount</filename> or + <filename>.automount</filename> unit of the file system <replaceable>WHAT</replaceable> on the mount point + <replaceable>WHERE</replaceable>.</para> + + <para>In many ways, <command>systemd-mount</command> is similar to the lower-level + <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry> command, however instead + of executing the mount operation directly and immediately, <command>systemd-mount</command> schedules it through + the service manager job queue, so that it may pull in further dependencies (such as parent mounts, or a file system + checker to execute a priori), and may make use of the auto-mounting logic.</para> + + <para>The command takes either one or two arguments. If only one argument is specified it should refer to a block + device containing a file system (e.g. <literal>/dev/sdb1</literal>), which is then probed for a label and other + metadata, and is mounted to a directory whose name is generated from the label. In this mode the block device must + exist at the time of invocation of the command, so that it may be probed. If the device is found to be a removable + block device (e.g. a USB stick) an automount point instead of a regular mount point is created (i.e. the + <option>--automount=</option> option is implied, see below).</para> + + <para>If two arguments are specified the first indicates the mount source (the <replaceable>WHAT</replaceable>) and + the second indicates the path to mount it on (the <replaceable>WHERE</replaceable>). In this mode no probing of the + source is attempted, and a backing device node doesn't have to exist yet. However, if this mode is combined with + <option>--discover</option>, device node probing for additional metadata is enabled, and – much like in the + single-argument case discussed above – the specified device has to exist at the time of invocation of the + command.</para> + + <para>Use the <option>--list</option> command to show a terse table of all local, known block devices with file + systems that may be mounted with this command.</para> + </refsect1> + + <refsect1> + <title>Options</title> + + <para>The following options are understood:</para> + + <variablelist> + + <varlistentry> + <term><option>--no-block</option></term> + + <listitem> + <para>Do not synchronously wait for the requested operation to finish. If this is not specified, the job will + be verified, enqueued and <command>systemd-mount</command> will wait until the mount or automount unit's + start-up is completed. By passing this argument, it is only verified and enqueued.</para> + </listitem> + </varlistentry> + + <xi:include href="standard-options.xml" xpointer="no-pager"/> + <xi:include href="standard-options.xml" xpointer="no-ask-password"/> + + <varlistentry> + <term><option>--quiet</option></term> + <term><option>-q</option></term> + + <listitem><para>Suppresses additional informational output while running.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--discover</option></term> + + <listitem><para>Enable probing of the mount source. This switch is implied if a single argument is specified on + the command line. If passed, additional metadata is read from the device to enhance the unit to create. For + example, a descriptive string for the transient units is generated from the file system label and device + model. Moreover if a removable block device (e.g. USB stick) is detected an automount unit instead of a regular + mount unit is created, with a short idle time-out, in order to ensure the file-system is placed in a clean + state quickly after each access.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--type=</option></term> + <term><option>-t</option></term> + + <listitem><para>Specifies the file system type to mount (e.g. <literal>vfat</literal>, <literal>ext4</literal>, + …). If omitted (or set to <literal>auto</literal>) the file system is determined automatically.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--options=</option></term> + <term><option>-o</option></term> + + <listitem><para>Additional mount options for the mount point.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--fsck=</option></term> + + <listitem><para>Takes a boolean argument, defaults to on. Controls whether to run a file system check + immediately before the mount operation. In the automount case (see <option>--automount=</option> below) the + check will be run the moment the first access to the device is made, which might slightly delay the + access.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--description=</option></term> + + <listitem><para>Provide a description for the mount or automount unit. See <varname>Description=</varname> in + <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--property=</option></term> + <term><option>-p</option></term> + + <listitem><para>Sets a unit property for the mount unit that is created. This takes an assignment in the same + format as <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s + <command>set-property</command> command.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--automount=</option></term> + + <listitem><para>Takes a boolean argument. Controls whether to create an automount point or a regular mount + point. If true an automount point is created that is backed by the actual file system at the time of first + access. If false a plain mount point is created that is backed by the actual file system immediately. Automount + points have the benefit that the file system stays unmounted and hence in clean state until it is first + accessed. In automount mode the <option>--timeout-idle-sec=</option> switch (see below) may be used to ensure + the mount point is unmounted automatically after the last access and an idle period passed.</para> + + <para>If this switch is not specified it defaults to false. If not specified and <option>--discover</option> is + used (or only a single argument passed, which implies <option>--discover</option>, see above), and the file + system block device is detected to be removable, it is set to true, in order to increase the chance that the + file system is in a fully clean state if the device is unplugged abruptly.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>-A</option></term> + + <listitem><para>Equivalent to <option>--automount=yes</option>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--timeout-idle-sec=</option></term> + + <listitem><para>Takes a time value that controls the idle timeout in automount mode. If set to + <literal>infinity</literal> (the default) no automatic unmounts are done. Otherwise the file system backing the + automount point is detached after the last access and the idle timeout passed. See + <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry> for details on + the time syntax supported. This option has no effect if only a regular mount is established, and automounting + is not used.</para> + + <para>Note that if <option>--discover</option> is used (or only a single argument passed, which implies + <option>--discover</option>, see above), and the file system block device is detected to be removable, + <option>--timeout-idle-sec=1s</option> is implied.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--automount-property=</option></term> + + <listitem><para>Similar to <option>--property=</option>, but applies additional properties to the automount + unit created, instead of the mount unit.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--bind-device=</option></term> + + <listitem><para>Takes a boolean argument, defaults to off. This option only has an effect in automount mode, + and controls whether the automount unit shall be bound to the backing device's lifetime. If enabled, the + automount point will be removed automatically when the backing device vanishes. If disabled the automount point + stays around, and subsequent accesses will block until backing device is replugged. This option has no effect + in case of non-device mounts, such as network or virtual file system mounts.</para> + + <para>Note that if <option>--discover</option> is used (or only a single argument passed, which implies + <option>--discover</option>, see above), and the file system block device is detected to be removable, this + option is implied.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--list</option></term> + + <listitem><para>Instead of establishing a mount or automount point, print a terse list of block devices + containing file systems that may be mounted with <literal>systemd-mount</literal>, along with useful metadata + such as labels, etc.</para></listitem> + </varlistentry> + + <xi:include href="user-system-options.xml" xpointer="user" /> + <xi:include href="user-system-options.xml" xpointer="system" /> + <xi:include href="user-system-options.xml" xpointer="host" /> + <xi:include href="user-system-options.xml" xpointer="machine" /> + + <xi:include href="standard-options.xml" xpointer="help" /> + <xi:include href="standard-options.xml" xpointer="version" /> + </variablelist> + + </refsect1> + + <refsect1> + <title>Exit status</title> + + <para>On success, 0 is returned, a non-zero failure + code otherwise.</para> + </refsect1> + + <refsect1> + <title>The udev Database</title> + + <para>If <option>--discover</option> is used, <command>systemd-mount</command> honors a couple of additional udev + properties of block devices:</para> + + <variablelist class='udev-directives'> + <varlistentry> + <term><varname>SYSTEMD_MOUNT_OPTIONS=</varname></term> + + <listitem><para>The mount options to use, if <option>--options=</option> is not used.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>SYSTEMD_MOUNT_WHERE=</varname></term> + + <listitem><para>The file system path to place the mount point at, instead of the automatically generated + one.</para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |