XkbSAGroup returns the group_XXX field of act converted to a signed int.
Actions
associated with the XkbGroupAction structure change the current group
state when keys are pressed and released:
typedef struct _XkbGroupAction { unsigned char type; /* XkbSA_{Set|Latch|Lock}Group */ unsigned char flags; /* with type, controls the effect on groups */ char group_XXX; /* represents a group index or delta */ } XkbGroupAction; WarningThis manpage seems to be incomplete