usr/src/sys/h/mx.h

/*      mx.h    4.1     11/9/80 */

#define NGROUPS         10      /* number of mpx files permitted at one time */
#define NCHANS          20      /* number of channel structures */
#define NPORTS          30      /* number of channels to i/o ports */
#define CNTLSIZ         10
#define NLEVELS         4
#define NMSIZE          50      /* max size of mxlstn file name */

/*
 * header returned on read of mpx
 */
struct  rh {
        short   index;
        short   count;
        short   ccount;
};

/*
 * head expected on write of mpx
 */
struct  wh {
        short   index;
        short   count;
        short   ccount;
        char    *data;
};

struct  mx_args {
        char    *m_name;
        int     m_cmd;
        int     m_arg[3];
};


#ifdef KERNEL
/*
 * internal structure for channel
 */

struct chan {
        short   c_flags;
        char    c_index;
        char    c_line;
        struct  group   *c_group;
        struct  file    *c_fy;
        struct  tty     *c_ttyp;
        struct  clist   c_ctlx;
        int     c_pgrp;
        struct  tty     *c_ottyp;
        char    c_oline;
        union {
                struct  clist   datq;
        } cx;
        union {
                struct  clist   datq;
                struct  chan    *c_chan;
        } cy;
        struct  clist   c_ctly;
};

struct schan {
        short   c_flags;
        char    c_index;
        char    c_line;
        struct  group   *c_group;
        struct  file    *c_fy;
        struct  tty     *c_ttyp;
        struct  clist   c_ctlx;
        int     c_pgrp;
};


/*
 * flags
 */
#define INUSE   01
#define SIOCTL  02
#define XGRP    04
#define YGRP    010
#define WCLOSE  020
#define ISGRP   0100
#define BLOCK   0200
#define EOTMARK 0400
#define SIGBLK  01000
#define BLKMSG  01000
#define ENAMSG  02000
#define WFLUSH  04000
#define NMBUF   010000
#define PORT    020000
#define ALT     040000
#define FBLOCK  0100000

#endif

/*
 * mpxchan command codes
 */
#define MPX     5
#define MPXN    6
#define CHAN    1
#define JOIN    2
#define EXTR    3
#define ATTACH  4
#define CONNECT 7
#define DETACH  8
#define DISCON  9
#define DEBUG   10
#define NPGRP   11
#define CSIG    12
#define PACK    13

#define NDEBUGS 30
/*
 * control channel message codes
 */
#define M_WATCH 1
#define M_CLOSE 2
#define M_EOT   3
#define M_OPEN  4
#define M_BLK   5
#define M_UBLK  6
#define DO_BLK  7
#define DO_UBLK 8
#define M_IOCTL 12
#define M_IOANS 13
#define M_SIG   14

/*
 * debug codes other than mpxchan cmds
 */
#define MCCLOSE 29
#define MCOPEN  28
#define ALL     27
#define SCON    26
#define MSREAD  25
#define SDATA   24
#define MCREAD  23
#define MCWRITE 22