static int
ioctl_emulate(int fd, unsigned long request, void *arg)
{
ioctl_tree *ret;
int ioctl_result = -1;
int orig_errno;
struct ioctl_fd_info *fdinfo;
if (fd_map_get(&ioctl_wrapped_fds, fd, (const void **)&fdinfo)) {
/* we default to erroring and an appropriate error code before
* tree_execute, as handlers might change errno; if they succeed, we
* reset errno */
orig_errno = errno;
/* evdev ioctls default to ENOENT; FIXME: record that instead of
* hardcoding, and handle in ioctl_tree */
if (_IOC_TYPE(request) == 'E')
errno = ENOENT;
else
errno = ENOTTY;
/* check our ioctl tree */
ret = ioctl_tree_execute(fdinfo->tree, fdinfo->last, request, arg, &ioctl_result);
DBG(DBG_IOCTL, "ioctl_emulate: tree execute ret %p, result %i, errno %i (%m); orig errno: %i\n", ret, ioctl_result, errno, orig_errno);
if (ret != NULL)
fdinfo->last = ret;
if (ioctl_result != -1 && errno != 0)
errno = orig_errno;
} else {
ioctl_result = UNHANDLED;
}
return ioctl_result;
}
static int
ioctl_emulate(int fd, unsigned long request, void *arg)
{
ioctl_tree *ret;
int ioctl_result = -2;
struct ioctl_fd_info *fdinfo;
if (fd_map_get(&ioctl_wrapped_fds, fd, (const void **)&fdinfo)) {
/* check our ioctl tree */
ret = ioctl_tree_execute(fdinfo->tree, fdinfo->last, request, arg, &ioctl_result);
if (ret != NULL)
fdinfo->last = ret;
}
/* -2 means "unhandled" */
return ioctl_result;
}
