xref: /freebsd/sys/sys/snoop.h (revision 069ac184)
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 
16 #ifndef _SYS_SNOOP_H_
17 #define	_SYS_SNOOP_H_
18 
19 #ifndef _KERNEL
20 #include <sys/types.h>
21 #endif
22 #include <sys/ioccom.h>
23 
24 /*
25  * These are snoop io controls
26  * SNPSTTY accepts a file descriptor as input.
27  */
28 
29 #define SNPSTTY       _IOW('T', 90, int)
30 #define SNPGTTY       _IOR('T', 89, dev_t)
31 
32 /*
33  * These values would be returned by FIONREAD ioctl
34  * instead of number of characters in buffer in case
35  * of specific errors.
36  */
37 #define SNP_OFLOW		-1
38 #define SNP_TTYCLOSE		-2
39 #define SNP_DETACH		-3
40 
41 #endif /* !_SYS_SNOOP_H_ */
42