FLATPAK OVERRIDE(1) flatpak override FLATPAK OVERRIDE(1)
NAME
flatpak-override - Override application requirements
SYNOPSIS
flatpak override [OPTION...] [APP]
DESCRIPTION
Overrides the application specified runtime requirements. This can be
used to grant a sandboxed application more or less resources than it
requested.
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.
If the application ID APP is not specified then the overrides affect
all applications, but the per-application overrides can override the
global overrides.
Unless overridden with the --user or --installation options, this
command changes the default system-wide installation.
OPTIONS
The following options are understood:
-h, --help
Show help options and exit.
-u, --user
Update a per-user installation.
--system
Update the default system-wide installation.
--installation=NAME
Updates a system-wide installation specified by NAME among those
defined in /etc/flatpak/installations.d/. Using
--installation=default is equivalent to using --system.
--share=SUBSYSTEM
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.
--unshare=SUBSYSTEM
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.
--socket=SOCKET
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, fallback-x11, pulseaudio, system-bus,
session-bus, ssh-auth, pcsc, cups, gpg-agent. This option can be
used multiple times.
--nosocket=SOCKET
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, fallback-x11, pulseaudio, system-bus,
session-bus, ssh-auth, pcsc, cups, gpg-agent. This option can be
used multiple times.
--device=DEVICE
Expose a device to the application. This overrides to the Context
section from the application metadata. DEVICE must be one of: dri,
kvm, shm, all. This option can be used multiple times.
--nodevice=DEVICE
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, shm, all. This option can be used multiple times.
--allow=FEATURE
Allow access to a specific feature. This updates the [Context]
group in the metadata. FEATURE must be one of: devel, multiarch,
bluetooth, canbus, per-app-dev-shm. This option can be used
multiple times.
See flatpak-build-finish(1) for the meaning of the various
features.
--disallow=FEATURE
Disallow access to a specific feature. This updates the [Context]
group in the metadata. FEATURE must be one of: devel, multiarch,
bluetooth, canbus, per-app-dev-shm. This option can be used
multiple times.
--filesystem=FILESYSTEM
Allow the application access to a subset of the filesystem. This
overrides to the Context section from the application metadata.
FILESYSTEM can be one of: home, host, host-os, host-etc,
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. See the "[Context]
filesystems" list in flatpak-metadata(5) for details of the
meanings of these filesystems.
--nofilesystem=FILESYSTEM
Undo the effect of a previous --filesystem=FILESYSTEM in the app's
manifest or a lower-precedence layer of overrides, and/or remove a
previous --filesystem=FILESYSTEM from this layer of overrides. This
overrides the Context section of the application metadata.
FILESYSTEM can take the same values as for --filesystem, but the
:ro and :create suffixes are not used here. This option can be used
multiple times.
This option does not prevent access to a more narrowly-scoped
--filesystem. For example, if an application has the equivalent of
--filesystem=xdg-config/MyApp in its manifest or as a system-wide
override, and flatpak override --user --nofilesystem=home as a
per-user override, then it will be prevented from accessing most of
the home directory, but it will still be allowed to access
$XDG_CONFIG_HOME/MyApp.
As a special case, --nofilesystem=host:reset will ignore all
--filesystem permissions inherited from the app manifest or a
lower-precedence layer of overrides, in addition to having the
behaviour of --nofilesystem=host.
--add-policy=SUBSYSTEM.KEY=VALUE
Add generic policy option. For example,
"--add-policy=subsystem.key=v1 --add-policy=subsystem.key=v2" would
map to this metadata:
[Policy subsystem]
key=v1;v2;
This option can be used multiple times.
--remove-policy=SUBSYSTEM.KEY=VALUE
Remove generic policy option. This option can be used multiple
times.
--env=VAR=VALUE
Set an environment variable in the application. This overrides to
the Context section from the application metadata. This option can
be used multiple times.
--unset-env=VAR
Unset an environment variable in the application. This overrides
the unset-environment entry in the [Context] group of the metadata,
and the [Environment] group. This option can be used multiple
times.
--env-fd=FD
Read environment variables from the file descriptor FD, and set
them as if via --env. This can be used to avoid environment
variables and their values becoming visible to other users.
Each environment variable is in the form VAR=VALUE followed by a
zero byte. This is the same format used by env -0 and
/proc/*/environ.
--own-name=NAME
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.
--talk-name=NAME
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.
--no-talk-name=NAME
Don't 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.
--system-own-name=NAME
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.
--system-talk-name=NAME
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.
--system-no-talk-name=NAME
Don't 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.
--persist=FILENAME
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.
--reset
Remove overrides. If an APP is given, remove the overrides for that
application, otherwise remove the global overrides.
--show
Shows overrides. If an APP is given, shows the overrides for that
application, otherwise shows the global overrides.
-v, --verbose
Print debug information during command processing.
--ostree-verbose
Print OSTree debug information during command processing.
EXAMPLES
$ flatpak override --nosocket=wayland org.gnome.gedit
$ flatpak override --filesystem=home org.mozilla.Firefox
SEE ALSO
flatpak(1), flatpak-run(1)
flatpak FLATPAK OVERRIDE(1)
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