1/*
2 * Copyright (c) 2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef __TTY_DEV_H__
30#define __TTY_DEV_H__
31
32/*
33 * ptmx_ioctl is a pointer to a list of pointers to tty structures which is
34 * grown, as necessary, copied, and replaced, but never shrunk.  The ioctl
35 * structures themselves pointed to from this list come and go as needed.
36 */
37struct ptmx_ioctl {
38	struct tty	*pt_tty;	/* pointer to ttymalloc()'ed data */
39	int		pt_flags;
40	struct selinfo	pt_selr;
41	struct selinfo	pt_selw;
42	u_char		pt_send;
43	u_char		pt_ucntl;
44	void		*pt_devhandle;	/* cloned slave device handle */
45};
46
47#define	PF_PKT		0x0008		/* packet mode */
48#define	PF_STOPPED	0x0010		/* user told stopped */
49#define	PF_REMOTE	0x0020		/* remote and flow controlled input */
50#define	PF_NOSTOP	0x0040
51#define PF_UCNTL	0x0080		/* user control mode */
52#define	PF_UNLOCKED	0x0100		/* slave unlock (master open resets) */
53#define	PF_OPEN_M	0x0200		/* master is open */
54#define	PF_OPEN_S	0x0400		/* slave is open */
55
56struct tty_dev_t {
57	int master;	// master major device number
58	int slave;	// slave major device number
59	unsigned int	fix_7828447:1,
60			fix_7070978:1,
61			mac_notify:1,
62			open_reset:1,
63			_reserved:28;
64#if __LP64__
65	int _pad;
66#endif
67
68	struct tty_dev_t *next;
69
70	struct ptmx_ioctl *(*open)(int minor, int flags);
71	int (*free)(int minor, int flags);
72	int (*name)(int minor, char *buffer, size_t size);
73	void (*revoke)(int minor, struct tty *tp);
74};
75
76extern void tty_dev_register(struct tty_dev_t *dev);
77
78extern int ttnread(struct tty *tp);
79
80#endif // __TTY_DEV_H__
81