fget_only_user
error = fget_only_user(fdp, fd, &cap_event_rights, &fp);
error = fget_only_user(fdp, fd, &cap_event_rights, &fp);
error = fget_only_user(fdp, fd->fd, &cap_event_rights, &fp);
error = fget_only_user(fdp, fds->fd, &cap_event_rights, &fp);
int fget_only_user(struct filedesc *fdp, int fd,