snoop.h revision 103167 
1/*
2 * Copyright (c) 1995 Ugen J.S.Antsilevich
3 *
4 * Redistribution and use in source forms, with and without modification,
5 * are permitted provided that this entire comment appears intact.
6 *
7 * Redistribution in binary form may occur without any restrictions.
8 * Obviously, it would be nice if you gave credit where credit is due
9 * but requiring it would be too onerous.
10 *
11 * This software is provided ``AS IS'' without any warranties of any kind.
12 *
13 * Snoop stuff.
14 *
15 * $FreeBSD: head/sys/sys/snoop.h 103167 2002-09-10 03:58:44Z arr $
16 */
17
18#ifndef _SYS_SNOOP_H_
19#define	_SYS_SNOOP_H_
20
21#ifndef _KERNEL
22#include <sys/types.h>
23#endif
24#include <sys/ioccom.h>
25
26/*
27 * These are snoop io controls
28 * SNPSTTY accepts 'struct snptty' as input.
29 * If ever type or  unit set to -1,snoop device
30 * detached from its current tty.
31 */
32
33#define SNPSTTY       _IOW('T', 90, dev_t)
34#define SNPGTTY       _IOR('T', 89, dev_t)
35
36/*
37 * These values would be returned by FIONREAD ioctl
38 * instead of number of characters in buffer in case
39 * of specific errors.
40 */
41#define SNP_OFLOW		-1
42#define SNP_TTYCLOSE		-2
43#define SNP_DETACH		-3
44
45#endif /* !_SYS_SNOOP_H_ */
46