bsd/kern/tty_ptmx.c

260 static int	ptmx_clone(dev_t dev, int minor);
284 ptsd_kevent_mtx_lock(int minor)
286 	lck_mtx_lock(&ptsd_kevent_lock[PTSD_KE_LOCK_INDEX(minor)]);
290 ptsd_kevent_mtx_unlock(int minor)
292 	lck_mtx_unlock(&ptsd_kevent_lock[PTSD_KE_LOCK_INDEX(minor)]);
345  * Given a minor number, return the corresponding structure for that minor
349  * Parameters:	minor			Minor number of ptmx device
355  *		!NULL			structure corresponding minor number
360 ptmx_get_ioctl(int minor, int open_flag)
393 		 * doing so avoids a reallocation race on the minor number.
420 		if (_state.pis_ioctl_list[minor] != NULL) {
433 		_state.pis_ioctl_list[minor] = new_ptmx_ioctl;
438 		_state.pis_ioctl_list[minor]->pt_flags |= PF_OPEN_M;
442 		_state.pis_ioctl_list[minor]->pt_devhandle = devfs_make_node(
443 				makedev(ptsd_major, minor),
445 				PTSD_TEMPLATE, minor);
446 		if (_state.pis_ioctl_list[minor]->pt_devhandle == NULL) {
451 		_state.pis_ioctl_list[minor]->pt_flags |= PF_OPEN_S;
454 	return (_state.pis_ioctl_list[minor]);
461 ptmx_free_ioctl(int minor, int open_flag)
466 	_state.pis_ioctl_list[minor]->pt_flags &= ~(open_flag);
473 	if (!(_state.pis_ioctl_list[minor]->pt_flags & (PF_OPEN_M|PF_OPEN_S))) {
475 		old_ptmx_ioctl = _state.pis_ioctl_list[ minor];
494 		_state.pis_ioctl_list[ minor] = NULL;
510  * minor number, or to return -1, if one can't be provided.
514  * Returns:	>= 0			A new minor device number
540 		 * XXX same time, we could return the same minor to two
545 		 * XXX That would require returning &minor as implict return
562 	if ((pti = ptmx_get_ioctl(minor(dev), 0)) == NULL) {
624 	pti = ptmx_get_ioctl(minor(dev), 0);
645 	ptmx_free_ioctl(minor(dev), PF_OPEN_S);
661 	pti = ptmx_get_ioctl(minor(dev), 0);
749 	pti = ptmx_get_ioctl(minor(dev), 0);
776 	pti = ptmx_get_ioctl(minor(tp->t_dev), 0);
797 	pti = ptmx_get_ioctl(minor(tp->t_dev), 0);
816 	pti = ptmx_get_ioctl(minor(dev), PF_OPEN_M);
834 			ptmx_free_ioctl(minor(dev), PF_OPEN_M);
858 	pti = ptmx_get_ioctl(minor(dev), 0);
883 	ptmx_free_ioctl(minor(dev), PF_OPEN_M);
896 	pti = ptmx_get_ioctl(minor(dev), 0);
968 	pti = ptmx_get_ioctl(minor(tp->t_dev), 0);
1044 	pti = ptmx_get_ioctl(minor(dev), 0);
1094 	pti = ptmx_get_ioctl(minor(dev), 0);
1176 	pti = ptmx_get_ioctl(minor(dev), 0);
1294 	pti = ptmx_get_ioctl(minor(dev), 0);
1426 			snprintf(data, 128, "/dev/" PTSD_TEMPLATE, minor(dev));
1554 	ptsd_kevent_mtx_lock(minor(lockdev));
1557 		pti = ptmx_get_ioctl(minor(dev), 0);
1569 	ptsd_kevent_mtx_unlock(minor(lockdev));
1580 	ptsd_kevent_mtx_lock(minor(dev));
1591 		pti = ptmx_get_ioctl(minor(dev), 0);
1626 	ptsd_kevent_mtx_unlock(minor(dev));
1642 	if ((pti = ptmx_get_ioctl(minor(dev), 0)) == NULL) {
1688 	ptsd_kevent_mtx_lock(minor(dev));
1700 	ptsd_kevent_mtx_unlock(minor(dev));
1707 	ptsd_kevent_mtx_lock(minor(dev));
1723 	ptsd_kevent_mtx_unlock(minor(dev));