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Annotation of coherent/d/286_KERNEL/USRSRC/coh/ct.c, revision 1.1.1.1

1.1       root        1: /* $Header: /newbits/286_KERNEL/USRSRC/coh/RCS/ct.c,v 1.1 92/01/09 13:26:32 bin Exp Locker: bin $ */
                      2: /* (lgl-
                      3:  *     The information contained herein is a trade secret of Mark Williams
                      4:  *     Company, and  is confidential information.  It is provided  under a
                      5:  *     license agreement,  and may be  copied or disclosed  only under the
                      6:  *     terms of  that agreement.  Any  reproduction or disclosure  of this
                      7:  *     material without the express written authorization of Mark Williams
                      8:  *     Company or persuant to the license agreement is unlawful.
                      9:  *
                     10:  *     COHERENT Version 2.3.37
                     11:  *     Copyright (c) 1982, 1983, 1984.
                     12:  *     An unpublished work by Mark Williams Company, Chicago.
                     13:  *     All rights reserved.
                     14:  -lgl) */
                     15: /*
                     16:  * Coherent
                     17:  * Console terminal driver.
                     18:  *
                     19:  * $Log:       ct.c,v $
                     20:  * Revision 1.1  92/01/09  13:26:32  bin
                     21:  * Initial revision
                     22:  * 
                     23:  * Revision 1.1        88/03/24  16:18:09      src
                     24:  * Initial revision
                     25:  * 
                     26:  * 86/11/19    Allan Cornish           /usr/src/sys/drv/ct.c
                     27:  * Added support for System V.3 compatible polls.
                     28:  */
                     29: #include <sys/coherent.h>
                     30: #include <sys/con.h>
                     31: #include <errno.h>
                     32: #include <sys/proc.h>
                     33: #include <sys/stat.h>
                     34: #include <sys/uproc.h>
                     35: 
                     36: /*
                     37:  * Functions for configuration.
                     38:  */
                     39: int    ctopen();
                     40: int    ctclose();
                     41: int    ctread();
                     42: int    ctwrite();
                     43: int    ctioctl();
                     44: int    ctpoll();
                     45: int    nulldev();
                     46: int    nonedev();
                     47: 
                     48: /*
                     49:  * Configuration table.
                     50:  */
                     51: CON ctcon ={
                     52:        DFCHR|DFPOL,                    /* Flags */
                     53:        1,                              /* Major index */
                     54:        ctopen,                         /* Open */
                     55:        ctclose,                        /* Close */
                     56:        nulldev,                        /* Block */
                     57:        ctread,                         /* Read */
                     58:        ctwrite,                        /* Write */
                     59:        ctioctl,                        /* Ioctl */
                     60:        nulldev,                        /* Powerfail */
                     61:        nulldev,                        /* Timeout */
                     62:        nulldev,                        /* Load */
                     63:        nulldev,                        /* Unload */
                     64:        ctpoll                          /* Poll */
                     65: };
                     66: 
                     67: /*
                     68:  * Open.
                     69:  */
                     70: ctopen(dev, m)
                     71: dev_t dev;
                     72: {
                     73:        register dev_t ttdev;
                     74: 
                     75:        if ((ttdev=SELF->p_ttdev) == NODEV) {
                     76:                u.u_error = ENXIO;
                     77:                return;
                     78:        }
                     79:        dopen(ttdev, m, DFCHR);
                     80: }
                     81: 
                     82: /*
                     83:  * Close.
                     84:  */
                     85: ctclose(dev)
                     86: dev_t dev;
                     87: {
                     88:        dclose(SELF->p_ttdev);
                     89: }
                     90: 
                     91: /*
                     92:  * Read.
                     93:  */
                     94: ctread(dev, iop)
                     95: dev_t dev;
                     96: IO *iop;
                     97: {
                     98:        dread(SELF->p_ttdev, iop);
                     99: }
                    100: 
                    101: /*
                    102:  * Write.
                    103:  */
                    104: ctwrite(dev, iop)
                    105: dev_t dev;
                    106: IO *iop;
                    107: {
                    108:        dwrite(SELF->p_ttdev, iop);
                    109: }
                    110: 
                    111: /*
                    112:  * Ioctl.
                    113:  */
                    114: ctioctl(dev, com, vec)
                    115: dev_t dev;
                    116: struct sgttyb *vec;
                    117: {
                    118:        dioctl(SELF->p_ttdev, com, vec);
                    119: }
                    120: 
                    121: /*
                    122:  * Poll.
                    123:  */
                    124: ctpoll(dev, ev)
                    125: dev_t dev;
                    126: int ev;
                    127: {
                    128:        return dpoll(SELF->p_ttdev, ev);
                    129: }

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