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   */
37  struct 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  
56  struct 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  
76  extern void tty_dev_register(struct tty_dev_t *dev);
77  
78  extern int ttnread(struct tty *tp);
79  
80  extern void termios32to64(struct termios32 *in, struct user_termios *out);
81  extern void termios64to32(struct user_termios *in, struct termios32 *out);
82  
83  #endif // __TTY_DEV_H__