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Length: 2155 (0x86b)
Types: TextFile
Notes: UNIX file
Names: »sxt.h«
└─⟦a6ab2eb36⟧ Bits:30004042/kconfig3.imd SW95705I 386/ix Multi-user Release 1.2
└─⟦a6ab2eb36⟧ UNIX Filesystem
└─⟦this⟧ »kc/new/usr/include/sys/sxt.h«
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)sxt.h 1.3"
/*
** Multiplexed channels driver header
*/
#define SXTRACE 1 /* 1 to include tracing */
#define MAXLINKS 32
#define CHAN(dev) (dev&CHANMASK)
#define LINK(dev) ((dev>>CHANBITS)&(0xff>>CHANBITS))
#if (MAXPCHAN*MAXLINKS) > 256
ERROR -- product cannot be greater than minor(dev)
#endif
struct Channel
{
struct tty tty; /* Virtual tty for this channel */
};
typedef struct Channel *Ch_p;
struct Link
{
struct tty * line; /* Real tty for this link */
char controllingtty; /* the current top dog */
char old; /* Old line discipline for line */
char nchans; /* Number of channels allowed */
unsigned char chanmask; /* Allowable channel bits */
char open; /* Channel open bits */
char xopen; /* Exclusive open bits */
char wpending; /* pending writes/channel */
char iblocked; /* channels blocked for input */
char oblocked; /* channels blocked for output*/
short lwchan; /* Last channel written bit */
char wrcnt; /* Number of writes on last channel written */
dev_t dev; /* major and minor device # */
struct Channel chans[1]; /* Array of channels for this link */
};
typedef struct Link * Link_p;
/*
** Ioctl args
*/
#define SXTIOCLINK ('b'<<8)
#define SXTIOCTRACE (SXTIOCLINK|1)
#define SXTIOCNOTRACE (SXTIOCLINK|2)
#define SXTIOCSWTCH (SXTIOCLINK|3)
#define SXTIOCWF (SXTIOCLINK|4)
#define SXTIOCBLK (SXTIOCLINK|5)
#define SXTIOCUBLK (SXTIOCLINK|6)
#define SXTIOCSTAT (SXTIOCLINK|7)
/* the following structure is used for the SXTIOCSTAT ioctl call */
struct sxtblock
{
char input; /* channels blocked on input */
char output; /* channels blocked on output */
};
#define t_link t_dstat /* Use dstat in real tty for linknumber */
#define MAXPCHAN 8 /* Maximum channel number */
#define CHANBITS 3 /* Bits for channel number */
#define CHANMASK 07 /* 2**CHANBITS - 1 */
#define SXTHOG 2 /* Channel consecutive write limit */