mirror of
https://github.com/systemd/systemd.git
synced 2024-11-23 18:23:32 +08:00
547 lines
24 KiB
XML
547 lines
24 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" >
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="org.freedesktop.portable1" conditional='ENABLE_PORTABLED'
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>org.freedesktop.portable1</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>org.freedesktop.portable1</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>org.freedesktop.portable1</refname>
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<refpurpose>The D-Bus interface of systemd-portabled</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Introduction</title>
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<para>
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<citerefentry><refentrytitle>systemd-portabled.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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is a system service that may be used to attach, detach and inspect portable services. This page describes the
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D-Bus interface.</para>
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</refsect1>
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<refsect1>
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<title>The Manager Object</title>
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<para>The service exposes the following interfaces on the Manager object on the bus:</para>
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<programlisting executable="systemd-portabled" node="/org/freedesktop/portable1" interface="org.freedesktop.portable1.Manager">
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node /org/freedesktop/portable1 {
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interface org.freedesktop.portable1.Manager {
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methods:
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GetImage(in s image,
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out o object);
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ListImages(out a(ssbtttso) images);
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GetImageOSRelease(in s image,
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out a{ss} os_release);
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GetImageMetadata(in s image,
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in as matches,
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out s image,
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out ay os_release,
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out a{say} units);
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GetImageMetadataWithExtensions(in s image,
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in as extensions,
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in as matches,
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in t flags,
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out s image,
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out ay os_release,
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out a{say} units);
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GetImageState(in s image,
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out s state);
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AttachImage(in s image,
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in as matches,
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in s profile,
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in b runtime,
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in s copy_mode,
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out a(sss) changes);
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AttachImageWithExtensions(in s image,
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in as extensions,
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in as matches,
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in s profile,
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in s copy_mode,
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in t flags,
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out a(sss) changes);
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DetachImage(in s image,
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in b runtime,
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out a(sss) changes);
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DetachImageWithExtensions(in s image,
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in as extensions,
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in t flags,
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out a(sss) changes);
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ReattachImage(in s image,
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in as matches,
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in s profile,
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in b runtime,
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in s copy_mode,
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out a(sss) changes_removed,
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out a(sss) changes_updated);
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ReattachImageWithExtensions(in s image,
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in as extensions,
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in as matches,
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in s profile,
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in s copy_mode,
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in t flags,
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out a(sss) changes_removed,
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out a(sss) changes_updated);
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RemoveImage(in s image);
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MarkImageReadOnly(in s image,
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in b read_only);
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SetImageLimit(in s image,
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in t limit);
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SetPoolLimit(in t limit);
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properties:
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly s PoolPath = '...';
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t PoolUsage = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t PoolLimit = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly as Profiles = ['...', ...];
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};
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interface org.freedesktop.DBus.Peer { ... };
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interface org.freedesktop.DBus.Introspectable { ... };
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interface org.freedesktop.DBus.Properties { ... };
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};
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</programlisting>
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<!--Autogenerated cross-references for systemd.directives, do not edit-->
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<variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.portable1.Manager"/>
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<variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.portable1.Manager"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetImage()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="ListImages()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetImageOSRelease()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetImageMetadata()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetImageMetadataWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetImageState()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="AttachImage()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="AttachImageWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="DetachImage()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="DetachImageWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="ReattachImage()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="ReattachImageWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="RemoveImage()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="MarkImageReadOnly()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="SetImageLimit()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="SetPoolLimit()"/>
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<variablelist class="dbus-property" generated="True" extra-ref="PoolPath"/>
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<variablelist class="dbus-property" generated="True" extra-ref="PoolUsage"/>
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<variablelist class="dbus-property" generated="True" extra-ref="PoolLimit"/>
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<variablelist class="dbus-property" generated="True" extra-ref="Profiles"/>
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<!--End of Autogenerated section-->
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<refsect2>
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<title>Methods</title>
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<para><function>GetImage()</function> may be used to get the image object path of the image with the
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specified name.</para>
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<para><function>ListImages()</function> returns an array of all currently known images. The
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structures in the array consist of the following fields: image name, type, read-only flag, creation
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time, modification time, current disk space, usage and image object path.</para>
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<para><function>GetImageOSRelease()</function> retrieves the OS release information of an image.
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This method returns an array of key value pairs read from the
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<citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> file in
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the image and is useful to identify the operating system used in a portable service.</para>
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<para><function>GetImageMetadata()</function> retrieves metadata associated with an image.
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This method returns the image name, the image's <citerefentry><refentrytitle>os-release</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> content in the form of a (streamable) array of bytes,
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and a list of portable units contained in the image, in the form of a string (unit name) and
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an array of bytes with the content.</para>
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<para><function>GetImageMetadataWithExtensions()</function> retrieves metadata associated with an image.
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This method is a superset of <function>GetImageMetadata()</function> with the addition of
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a list of extensions as input parameter, which were overlaid on top of the main
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image via <function>AttachImageWithExtensions()</function>.
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The <varname>flag</varname> parameter is currently unused and reserved for future purposes.</para>
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<para><function>GetImageState()</function> retrieves the image state as one of the following
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strings:
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<itemizedlist>
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<listitem><para>detached</para></listitem>
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<listitem><para>attached</para></listitem>
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<listitem><para>attached-runtime</para></listitem>
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<listitem><para>enabled</para></listitem>
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<listitem><para>enabled-runtime</para></listitem>
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<listitem><para>running</para></listitem>
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<listitem><para>running-runtime</para></listitem>
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</itemizedlist></para>
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<para><function>AttachImage()</function> attaches a portable image to the system.
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This method takes an image path or name, a list of strings that will be used to search for
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unit files inside the image (partial or complete matches), a string indicating which
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portable profile to use for the image (see <varname>Profiles</varname> property for
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a list of available profiles), a boolean indicating whether to attach the image only
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for the current boot session, and a string representing the preferred copy mode
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(whether to copy the image or to just symlink it) with the following possible values:
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<itemizedlist>
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<listitem><para>(null)</para></listitem>
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<listitem><para>copy</para></listitem>
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<listitem><para>symlink</para></listitem>
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</itemizedlist>
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This method returns the list of changes applied to the system (for example, which unit was
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added and is now available as a system service). Each change is represented as a triplet of
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strings: the type of change applied, the path on which it was applied, and the source
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(if any). The type of change applied will be one of the following possible values:
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<itemizedlist>
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<listitem><para>copy</para></listitem>
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<listitem><para>symlink</para></listitem>
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<listitem><para>write</para></listitem>
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<listitem><para>mkdir</para></listitem>
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</itemizedlist>
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Note that an image cannot be attached if a unit that it contains is already present
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on the system.</para>
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<para><function>AttachImageWithExtensions()</function> attaches a portable image to the system.
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This method is a superset of <function>AttachImage()</function> with the addition of
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a list of extensions as input parameter, which will be overlaid on top of the main
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image. When this method is used, detaching must be done by passing the same arguments via the
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<function>DetachImageWithExtensions()</function> method. For more details on this functionality,
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see the <varname>MountImages=</varname> entry on
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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and <citerefentry><refentrytitle>systemd-sysext</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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The <varname>flag</varname> parameter is currently unused and reserved for future purposes.</para>
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<para><function>DetachImage()</function> detaches a portable image from the system.
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This method takes an image path or name, and a boolean indicating whether the image to
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detach was attached only for the current boot session or persistently. This method
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returns the list of changes applied to the system (for example, which unit was removed
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and is no longer available as a system service). Each change is represented as a triplet of
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strings: the type of change applied, the path on which it was applied, and the source
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(if any). The type of change applied will be one of the following possible values:
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<itemizedlist>
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<listitem><para>unlink</para></listitem>
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</itemizedlist>
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Note that an image cannot be detached if a unit that it contains is running.</para>
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<para><function>DetachImageWithExtensions()</function> detaches a portable image from the system.
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This method is a superset of <function>DetachImage()</function> with the addition of
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a list of extensions as input parameter, which were overlaid on top of the main
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image via <function>AttachImageWithExtensions()</function>.
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The <varname>flag</varname> parameter is currently unused and reserved for future purposes.</para>
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<para><function>ReattachImage()</function> combines the effects of the
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<function>AttachImage()</function> method and the <function>DetachImage()</function> method.
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The difference is that it is allowed to reattach an image while one or more of its units
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are running. The reattach operation will fail if no matching image is attached.
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The input parameters match the <function>AttachImage()</function> method, and the return
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parameters are the combination of the return parameters of the
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<function>DetachImage()</function> method (first array, units that were removed) and the
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<function>AttachImage()</function> method (second array, units that were updated or added).</para>
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<para><function>ReattachImageWithExtensions()</function> reattaches a portable image to the system.
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This method is a superset of <function>ReattachImage()</function> with the addition of
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a list of extensions as input parameter, which will be overlaid on top of the main
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image. For more details on this functionality, see the <varname>MountImages=</varname> entry on
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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and <citerefentry><refentrytitle>systemd-sysext</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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The <varname>flag</varname> parameter is currently unused and reserved for future purposes</para>
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<para><function>RemoveImage()</function> removes the image with the specified name.</para>
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<para><function>MarkImageReadOnly()</function> toggles the read-only flag of an image.</para>
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<para><function>SetPoolLimit()</function> sets an overall quota limit on the pool of images.</para>
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<para><function>SetImageLimit()</function> sets a per-image quota limit.</para>
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<para>The <function>AttachImageWithExtensions()</function>,
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<function>DetachImageWithExtensions()</function> and
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<function>ReattachImageWithExtensions()</function> methods take in options as flags instead of
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booleans to allow for extendability, defined as follows:</para>
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<programlisting>
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#define SD_SYSTEMD_PORTABLE_RUNTIME (UINT64_C(1) << 0)
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</programlisting>
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</refsect2>
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<refsect2>
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<title>Properties</title>
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<para><varname>PoolPath</varname> specifies the file system path where images are written to.</para>
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<para><varname>PoolUsage</varname> specifies the current usage size of the image pool in bytes.</para>
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<para><varname>PoolLimit</varname> specifies the size limit of the image pool in bytes.</para>
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<para><varname>Profiles</varname> specifies the available runtime profiles for portable services.</para>
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</refsect2>
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</refsect1>
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<refsect1>
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<title>The Image Object</title>
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<para>The service exposes the following interfaces on the Image object on the bus:</para>
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<programlisting executable="systemd-portabled" node="/org/freedesktop/portable1" interface="org.freedesktop.portable1.Image">
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node /org/freedesktop/portable1 {
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interface org.freedesktop.portable1.Image {
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methods:
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GetOSRelease(out a{ss} os_release);
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GetMetadata(in as matches,
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out s image,
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out ay os_release,
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out a{say} units);
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GetMetadataWithExtensions(in as extensions,
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in as matches,
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in t flags,
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out s image,
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out ay os_release,
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out a{say} units);
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GetState(out s state);
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Attach(in as matches,
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in s profile,
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in b runtime,
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in s copy_mode,
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out a(sss) changes);
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AttachWithExtensions(in as extensions,
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in as matches,
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in s profile,
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in s copy_mode,
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in t flags,
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out a(sss) changes);
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Detach(in b runtime,
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out a(sss) changes);
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DetachWithExtensions(in as extensions,
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in t flags,
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out a(sss) changes);
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Reattach(in as matches,
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in s profile,
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in b runtime,
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in s copy_mode,
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out a(sss) changes_removed,
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out a(sss) changes_updated);
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ReattacheWithExtensions(in as extensions,
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in as matches,
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in s profile,
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in s copy_mode,
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in t flags,
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out a(sss) changes_removed,
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out a(sss) changes_updated);
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Remove();
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MarkReadOnly(in b read_only);
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SetLimit(in t limit);
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properties:
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly s Name = '...';
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly s Path = '...';
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly s Type = '...';
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly b ReadOnly = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t CreationTimestamp = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t ModificationTimestamp = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t Usage = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t Limit = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t UsageExclusive = ...;
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@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
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readonly t LimitExclusive = ...;
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};
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interface org.freedesktop.DBus.Peer { ... };
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interface org.freedesktop.DBus.Introspectable { ... };
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interface org.freedesktop.DBus.Properties { ... };
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};
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</programlisting>
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<!--method GetOSRelease is not documented!-->
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<!--method GetMetadata is not documented!-->
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<!--method GetMetadataWithExtensions is not documented!-->
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<!--method GetState is not documented!-->
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<!--method Attach is not documented!-->
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<!--method AttachWithExtensions is not documented!-->
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<!--method Detach is not documented!-->
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<!--method DetachWithExtensions is not documented!-->
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<!--method Reattach is not documented!-->
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<!--method ReattacheWithExtensions is not documented!-->
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<!--method Remove is not documented!-->
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<!--method MarkReadOnly is not documented!-->
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<!--method SetLimit is not documented!-->
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<!--Autogenerated cross-references for systemd.directives, do not edit-->
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<variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.portable1.Image"/>
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<variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.portable1.Image"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetOSRelease()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetMetadata()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetMetadataWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="GetState()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="Attach()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="AttachWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="Detach()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="DetachWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="Reattach()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="ReattacheWithExtensions()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="Remove()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="MarkReadOnly()"/>
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<variablelist class="dbus-method" generated="True" extra-ref="SetLimit()"/>
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<variablelist class="dbus-property" generated="True" extra-ref="Name"/>
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|
<variablelist class="dbus-property" generated="True" extra-ref="Path"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="Type"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="ReadOnly"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="CreationTimestamp"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="ModificationTimestamp"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="Usage"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="Limit"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="UsageExclusive"/>
|
|
|
|
<variablelist class="dbus-property" generated="True" extra-ref="LimitExclusive"/>
|
|
|
|
<!--End of Autogenerated section-->
|
|
|
|
<refsect2>
|
|
<title>Methods</title>
|
|
|
|
<para>The following methods implement the same operation as the respective methods on the
|
|
<interfacename>Manager</interfacename> object (see above). However, these methods operate on the image
|
|
object and hence does not take an image name parameter. Invoking the methods directly on the Manager
|
|
object has the advantage of not requiring a <function>GetImage()</function> call to get the image object
|
|
for a specific image name. Calling the methods on the Manager object is hence a round trip
|
|
optimization. List of methods:
|
|
<itemizedlist>
|
|
<listitem><para>GetOSRelease()</para></listitem>
|
|
|
|
<listitem><para>GetMetadata()</para></listitem>
|
|
|
|
<listitem><para>GetMetadataWithExtensions()</para></listitem>
|
|
|
|
<listitem><para>GetState()</para></listitem>
|
|
|
|
<listitem><para>Attach()</para></listitem>
|
|
|
|
<listitem><para>AttachWithExtensions()</para></listitem>
|
|
|
|
<listitem><para>Detach()</para></listitem>
|
|
|
|
<listitem><para>DetachWithExtensions()</para></listitem>
|
|
|
|
<listitem><para>Reattach()</para></listitem>
|
|
|
|
<listitem><para>ReattacheWithExtensions()</para></listitem>
|
|
|
|
<listitem><para>Remove()</para></listitem>
|
|
|
|
<listitem><para>MarkReadOnly()</para></listitem>
|
|
|
|
<listitem><para>SetLimit()</para></listitem>
|
|
</itemizedlist></para>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title>Properties</title>
|
|
|
|
<para><varname>Name</varname> specifies the image name.</para>
|
|
|
|
<para><varname>Path</varname> specifies the file system path where image is stored.</para>
|
|
|
|
<para><varname>Type</varname> specifies the image type.</para>
|
|
|
|
<para><varname>ReadOnly</varname> specifies whether the image is read-only.</para>
|
|
|
|
<para><varname>CreationTimestamp</varname> specifies the image creation timestamp.</para>
|
|
|
|
<para><varname>ModificationTimestamp</varname> specifies the image modification timestamp.</para>
|
|
|
|
<para><varname>Usage</varname> specifies the image disk usage.</para>
|
|
|
|
<para><varname>Limit</varname> specifies the image disk usage limit.</para>
|
|
|
|
<para><varname>UsageExclusive</varname> specifies the image disk usage (exclusive).</para>
|
|
|
|
<para><varname>LimitExclusive</varname> specifies the image disk usage limit (exclusive).</para>
|
|
</refsect2>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Versioning</title>
|
|
|
|
<para>These D-Bus interfaces follow <ulink url="http://0pointer.de/blog/projects/versioning-dbus.html">
|
|
the usual interface versioning guidelines</ulink>.</para>
|
|
</refsect1>
|
|
</refentry>
|