flatpak-builder/doc/flatpak-override.xml

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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">
<refentry id="flatpak-override">
<refentryinfo>
<title>flatpak override</title>
<productname>flatpak</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Alexander</firstname>
<surname>Larsson</surname>
<email>alexl@redhat.com</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>flatpak override</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>flatpak-override</refname>
<refpurpose>Override application requirements</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>flatpak override</command>
<arg choice="opt" rep="repeat">OPTION</arg>
<arg choice="plain">APP</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
Overrides the application specified runtime requirements. This can be used
to grant a sandboxed application more or less resources than it requested.
</para>
<para>
By default the application gets access to the resources it
requested when it is started. But the user can override it
on a particular instance by specifying extra arguments to
flatpak run, or every time by using flatpak override.
</para>
<para>
Unless overridden with the --user or --installation options, this command
changes the default system-wide installation.
</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>-h</option></term>
<term><option>--help</option></term>
<listitem><para>
Show help options and exit.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--user</option></term>
<listitem><para>
Update a per-user installation.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--system</option></term>
<listitem><para>
Update the default system-wide installation.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--installation=NAME</option></term>
<listitem><para>
Updates a system-wide installation specified by <arg choice="plain">NAME</arg>
among those defined in <filename>/etc/flatpak/installations.d</filename>.
Using <arg choice="plain">--installation=default</arg> is equivalent to using
<arg choice="plain">--system</arg>.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--share=SUBSYSTEM</option></term>
<listitem><para>
Share a subsystem with the host session. This overrides
the Context section from the application metadata.
SUBSYSTEM must be one of: network, ipc.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--unshare=SUBSYSTEM</option></term>
<listitem><para>
Don't share a subsystem with the host session. This overrides
the Context section from the application metadata.
SUBSYSTEM must be one of: network, ipc.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--socket=SOCKET</option></term>
<listitem><para>
Expose a well-known socket to the application. This overrides to
the Context section from the application metadata.
SOCKET must be one of: x11, wayland, pulseaudio, system-bus, session-bus.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--nosocket=SOCKET</option></term>
<listitem><para>
Don't expose a well-known socket to the application. This overrides to
the Context section from the application metadata.
SOCKET must be one of: x11, wayland, pulseaudio, system-bus, session-bus.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--device=DEVICE</option></term>
<listitem><para>
Expose a device to the application. This overrides to
the Context section from the application metadata.
DEVICE must be one of: dri, kvm, all.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--nodevice=DEVICE</option></term>
<listitem><para>
Don't expose a device to the application. This overrides to
the Context section from the application metadata.
DEVICE must be one of: dri, kvm, all.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--filesystem=FS</option></term>
<listitem><para>
Allow the application access to a subset of the filesystem.
This overrides to the Context section from the application metadata.
FS can be one of: home, host, xdg-desktop, xdg-documents, xdg-download
xdg-music, xdg-pictures, xdg-public-share, xdg-templates, xdg-videos, xdg-run,
xdg-config, xdg-cache, xdg-data,
an absolute path, or a homedir-relative path like ~/dir or paths
relative to the xdg dirs, like xdg-download/subdir.
The optional :ro suffix indicates that the location will be read-only.
The optional :create suffix indicates that the location will be read-write and created if it doesn't exist.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--env=VAR=VALUE</option></term>
<listitem><para>
Set an environment variable in the application.
This overrides to the Context section from the application metadata.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--own-name=NAME</option></term>
<listitem><para>
Allow the application to own the well-known name NAME on the session bus.
This overrides to the Context section from the application metadata.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--talk-name=NAME</option></term>
<listitem><para>
Allow the application to talk to the well-known name NAME on the session bus.
This overrides to the Context section from the application metadata.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--system-own-name=NAME</option></term>
<listitem><para>
Allow the application to own the well known name NAME on the system bus.
If NAME ends with .*, it allows the application to own all matching names.
This overrides to the Context section from the application metadata.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--system-talk-name=NAME</option></term>
<listitem><para>
Allow the application to talk to the well known name NAME on the system bus.
If NAME ends with .*, it allows the application to talk to all matching names.
This overrides to the Context section from the application metadata.
This option can be used multiple times.
</para></listitem>
</varlistentry>
`
<varlistentry>
<term><option>--persist=FILENAME</option></term>
<listitem><para>
If the application doesn't have access to the real homedir, make the (homedir-relative) path
FILENAME a bind mount to the corresponding path in the per-application directory,
allowing that location to be used for persistent data.
This overrides to the Context section from the application metadata.
This option can be used multiple times.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-v</option></term>
<term><option>--verbose</option></term>
<listitem><para>
Print debug information during command processing.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--version</option></term>
<listitem><para>
Print version information and exit.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
<command>$ flatpak override --nosocket=wayland org.gnome.GEdit</command>
</para>
<para>
<command>$ flatpak override --filesystem=home org.mozilla.Firefox</command>
</para>
</refsect1>
<refsect1>
<title>See also</title>
<para>
<citerefentry><refentrytitle>flatpak</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>flatpak-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>