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/*
* Copyright (c) 1995 Ugen J.S.Antsilevich
*
* Redistribution and use in source forms, with and without modification,
* are permitted provided that this entire comment appears intact.
*
* Redistribution in binary form may occur without any restrictions.
* Obviously, it would be nice if you gave credit where credit is due
* but requiring it would be too onerous.
*
* This software is provided ``AS IS'' without any warranties of any kind.
*
* Snoop stuff.
*/
#ifndef _SYS_SNOOP_H_
#define _SYS_SNOOP_H_
#ifndef KERNEL
#include <sys/types.h>
#endif
#include <sys/ioccom.h>
#ifdef KERNEL
#define SNOOP_MINLEN (4*1024) /* This should be power of 2.
* 4K tested to be the minimum
* for which on normal tty
* usage there is no need to
* allocate more.
*/
#define SNOOP_MAXLEN (64*1024) /* This one also,64K enough
* If we grow more,something
* really bad in this world..
*/
/*
* This is the main snoop per-device
* structure...
*/
struct snoop {
dev_t snp_target; /* major/minor number of device*/
struct tty *snp_tty; /* tty device pointer */
u_long snp_len; /* buffer data length */
u_long snp_base; /* buffer data base */
u_long snp_blen; /* Overall buffer len */
caddr_t snp_buf; /* Data buffer */
int snp_flags; /* Flags place */
#define SNOOP_ASYNC 0x0002
#define SNOOP_OPEN 0x0004
#define SNOOP_RWAIT 0x0008
#define SNOOP_OFLOW 0x0010
#define SNOOP_DOWN 0x0020
struct selinfo snp_sel; /* Selection info */
};
/* XXX several wrong storage classes and types here. */
int snpdown __P((struct snoop *snp));
int snpin __P((struct snoop *snp, char *buf, int n));
int snpinc __P((struct snoop *snp, char c));
#endif /* KERNEL */
/*
* Theese are snoop io controls
* SNPSTTY accepts 'struct snptty' as input.
* If ever type or unit set to -1,snoop device
* detached from its current tty.
*/
#define SNPSTTY _IOW('T', 90, dev_t)
#define SNPGTTY _IOR('T', 89, dev_t)
/*
* Theese values would be returned by FIONREAD ioctl
* instead of number of characters in buffer in case
* of specific errors.
*/
#define SNP_OFLOW -1
#define SNP_TTYCLOSE -2
#define SNP_DETACH -3
#endif /* !_SYS_SNOOP_H_ */
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