bsd/kern/tty_dev.h

   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 #endif // __TTY_DEV_H__