XkbGetKeyBehaviors - Man Page
Obtain the behaviors (the behaviors array) for a subset of the keys in a keyboard description from the server
Status XkbGetKeyBehaviors (Display *dpy, unsigned int first, unsigned int num, XkbDescPtr xkb);
connection to server
keycode of first key to get
number of keys for which behaviors are desired
Xkb description to contain the result
XkbGetKeyBehaviors sends a request to the server to obtain the behaviors for num keys on the keyboard starting with the key whose keycode is first. It waits for a reply and returns the behaviors in the server->behaviors field of xkb. If successful, XkbGetKeyBehaviors returns Success.
If the server map in the xkb parameter has not been allocated, XkbGetKeyBehaviors allocates and initializes it before obtaining the actions.
If the server does not have a compatible version of Xkb, or the Xkb extension has not been properly initialized, XkbGetKeyBehaviors returns BadAccess. If num is less than 1 or greater than XkbMaxKeyCount, XkbGetKeyBehaviors returns BadValue. If any allocation errors occur, XkbGetKeyBehaviors returns BadAlloc.
The Xkb extension has not been properly initialized
Unable to allocate storage
An argument is out of range
XkbGetMap(3), XkbGetUpdatedMap(3), XkbSetMap(3).