xev - print contents of X events
xev [-display
displayname] [-geometry
geom] [-bw
pixels] [-bs
{NotUseful,WhenMapped,Always}] [-id
windowid] [-root] [-s] [-name
string] [-rv] [-version] [-event
event_mask [-event
event_mask ...]]
Xev creates a window and then asks the X server to send it
events
whenever anything happens to the window (such as it being moved, resized,
typed in, clicked in, etc.). You can also attach it to an existing window. It
is useful for seeing what causes events to occur and to display the
information that they contain; it is essentially a debugging and development
tool, and should not be needed in normal usage.
- -display display
- This option specifies the X server to contact.
- -geometry geom
- This option specifies the size and/or location of the
window, if a window is to be created.
- -bw pixels
- This option specifies the border width for the window.
- -bs {NotUseful,WhenMapped,Always}
- This option specifies what kind of backing store to give
the window. The default is NotUseful. Backing store refers to the the
pixels saved off-screen when the X server maintains the contents of a
window; NotUseful means that the xev process will redraw its contents
itself, as necessary.
- -id windowid
- This option specifies that the window with the given id
should be monitored, instead of creating a new window.
- -root
- This option specifies that the root window should be
monitored, instead of creating a new window.
- -s
- This option specifies that save-unders should be enabled on
the window. Save unders are similar to backing store, but they refer
rather to the saving of pixels off-screen when the current window obscures
other windows. Save unders are only advisory, and are normally set for
popup dialogs and other transient windows.
- -name string
- This option specifies the name to assign to the created
window.
- -rv
- This option specifies that the window should be in reverse
video.
- -event event_mask
- Select which events to display. The -event option
can be specified multiple times to select multiple types of events. When
not specified, all events are selected. Available event masks: keyboard
mouse expose visibility structure substructure focus property colormap
owner_grab_button randr button
- -version
- This option prints the program version and exits.
X(7),
xwininfo(1),
xdpyinfo(1), Xlib Programmers Manual, X Protocol
Specification
See
X(7) for a full statement of rights and permissions.
Jim Fulton, MIT X Consortium