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- #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 COPEN 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
-
- #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_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
-
-