GDBUS

Commands

introspect

Prints out interfaces and property values for a remote object. For this to work, the owner of the object needs to implement theorg.freedesktop.DBus.Introspectableinterface. If the--xmloption is used, the returned introspection XML is printed, otherwise a parsed pretty representation is printed. The--recurseoption can be used to introspect children (and their children and so on) and the--only-propertiesoption can be used to only print the interfaces with properties.

monitor

Monitors one or all objects owned by the owner ofbus_name.

call

Invokes a method on a remote object. Each argument to pass to the method must be specified as a serializedGVariantexcept that strings do not need explicit quotes. The return values are printed out as serializedGVariantvalues.

emit

Emits a signal. Each argument to include in the signal must be specified as a serializedGVariantexcept that strings do not need explicit quotes.

help

Prints help and exit.

BASH COMPLETION

gdbusships with a bash completion script to complete commands, destinations, bus names, object paths and interface/method names. 

EXAMPLES

  This shows how to introspect an object - note that the value of each
  property is displayed:

$ gdbus introspect --system \        --dest org.freedesktop.NetworkManager \        --object-path /org/freedesktop/NetworkManager/Devices/0node /org/freedesktop/NetworkManager/Devices/0 {  interface org.freedesktop.DBus.Introspectable {    methods:      Introspect(out s data);  };  interface org.freedesktop.DBus.Properties {    methods:      Get(in  s interface,          in  s propname,          out v value);      Set(in  s interface,          in  s propname,          in  v value);      GetAll(in  s interface,             out a{sv} props);  };  interface org.freedesktop.NetworkManager.Device.Wired {    signals:      PropertiesChanged(a{sv} arg_0);    properties:      readonly b Carrier = false;      readonly u Speed = 0;      readonly s HwAddress = '00:1D:72:88:BE:97';  };  interface org.freedesktop.NetworkManager.Device {    methods:      Disconnect();    signals:      StateChanged(u arg_0,                   u arg_1,                   u arg_2);    properties:      readonly u DeviceType = 1;      readonly b Managed = true;      readwrite o Ip6Config = '/';      readwrite o Dhcp4Config = '/';      readwrite o Ip4Config = '/';      readonly u State = 2;      readwrite u Ip4Address = 0;      readonly u Capabilities = 3;      readonly s Driver = 'e1000e';      readwrite s Interface = 'eth0';      readonly s Udi = '/sys/devices/pci0000:00/0000:00:19.0/net/eth0';  };};

The--recurseand--only-propertiesoptions can be useful when wanting to inspect all objects owned by a particular process:

$ gdbus introspect --system --dest org.freedesktop.UPower --object-path / --recurse  --only-properties node / {  node /org {    node /org/freedesktop {      node /org/freedesktop/UPower {        interface org.freedesktop.UPower {          properties:            readonly b IsDocked = true;            readonly b LidForceSleep = false;            readonly b LidIsPresent = false;            readonly b LidIsClosed = false;            readonly b OnLowBattery = false;            readonly b OnBattery = false;            readonly b CanHibernate = true;            readonly b CanSuspend = true;            readonly s DaemonVersion = '0.9.10';        };        node /org/freedesktop/UPower/Policy {        };        node /org/freedesktop/UPower/Wakeups {          interface org.freedesktop.UPower.Wakeups {            properties:              readonly b HasCapability = true;          };        };      };    };  };};

In a similar fashion, theintrospectcommand can be used to learn details about theNotifymethod:

[...]  interface org.freedesktop.Notifications {    methods:      GetServerInformation(out s return_name,                           out s return_vendor,                           out s return_version,                           out s return_spec_version);      GetCapabilities(out as return_caps);      CloseNotification(in  u id);      Notify(in  s app_name,             in  u id,             in  s icon,             in  s summary,             in  s body,             in  as actions,             in  a{sv} hints,             in  i timeout,             out u return_id);  };[...]

With this information, it's easy to use thecallcommand to display a notification

$ gdbus call --session \             --dest org.freedesktop.Notifications \             --object-path /org/freedesktop/Notifications \             --method org.freedesktop.Notifications.Notify \             my_app_name \             42 \             gtk-dialog-info \             "The Summary" \             "Here's the body of the notification" \             [] \             {} \             5000(uint32 12,)

Monitoring all objects on a service:

$ gdbus monitor --system --dest org.freedesktop.ConsoleKitMonitoring signals from all objects owned by org.freedesktop.ConsoleKitThe name org.freedesktop.ConsoleKit is owned by :1.15/org/freedesktop/ConsoleKit/Session2: org.freedesktop.ConsoleKit.Session.ActiveChanged (false,)/org/freedesktop/ConsoleKit/Seat1: org.freedesktop.ConsoleKit.Seat.ActiveSessionChanged ('',)/org/freedesktop/ConsoleKit/Session2: org.freedesktop.ConsoleKit.Session.ActiveChanged (true,)/org/freedesktop/ConsoleKit/Seat1: org.freedesktop.ConsoleKit.Seat.ActiveSessionChanged ('/org/freedesktop/ConsoleKit/Session2',)

Monitoring a single object on a service:

$ gdbus monitor --system --dest org.freedesktop.NetworkManager --object-path /org/freedesktop/NetworkManager/AccessPoint/4141Monitoring signals on object /org/freedesktop/NetworkManager/AccessPoint/4141 owned by org.freedesktop.NetworkManagerThe name org.freedesktop.NetworkManager is owned by :1.5/org/freedesktop/NetworkManager/AccessPoint/4141: org.freedesktop.NetworkManager.AccessPoint.PropertiesChanged ({'Strength': <byte 0x5c>},)/org/freedesktop/NetworkManager/AccessPoint/4141: org.freedesktop.NetworkManager.AccessPoint.PropertiesChanged ({'Strength': <byte 0x64>},)/org/freedesktop/NetworkManager/AccessPoint/4141: org.freedesktop.NetworkManager.AccessPoint.PropertiesChanged ({'Strength': <byte 0x5e>},)/org/freedesktop/NetworkManager/AccessPoint/4141: org.freedesktop.NetworkManager.AccessPoint.PropertiesChanged ({'Strength': <byte 0x64>},)

Emitting a signal:

$ gdbus emit --session --object-path /foo --signal org.bar.Foo "['foo', 'bar', 'baz']"

Emitting a signal to a specific process:

$ gdbus emit --session --object-path /bar --signal org.bar.Bar someString --dest :1.42

AUTHOR

Written by David ZeuthenzeuthenAATTgmail.comwith a lot of help from many others. 

BUGS

Please send bug reports to either the distribution bug tracker or the upstream bug tracker atm[blue]https://bugzilla.gnome.org/enter_bug.cgi?product=glibm[]. 

SEE ALSO

dbus-send(1)

Index

NAME

SYNOPSIS

DESCRIPTION

Commands

BASH COMPLETION

EXAMPLES

AUTHOR

BUGS

SEE ALSO