# 2.11BSD#431 - /usr/src/sys/sys/tty_tty.c

##### Functions

    syioctl           X
    syopen            X
    syread            X
    syselect          X
    sywrite           X

       1: /*
       2:  * Copyright (c) 1986 Regents of the University of California.
       3:  * All rights reserved.  The Berkeley software License Agreement
       4:  * specifies the terms and conditions for redistribution.
       5:  *
       6:  *	@(#)tty_tty.c	1.2 (2.11BSD GTE) 11/29/94
       7:  */
       8:
       9: /*
      10:  * Indirect driver for controlling tty.
      11:  *
      12:  */
      13: #include "param.h"
      14: #include "user.h"
      15: #include "proc.h"
      16: #include "ioctl.h"
      17: #include "tty.h"
      18: #include "conf.h"
      19:
      20: /*ARGSUSED*/
      21: syopen(dev, flag)
      22:     dev_t dev;
      23:     int flag;
      24: {
      25:     if (u.u_ttyp == NULL)
      26:         return (ENXIO);
      27:     return((*cdevsw[major(u.u_ttyd)].d_open)(u.u_ttyd, flag));
      28: }
      29:
      30: /*ARGSUSED*/
      31: syread(dev, uio, flag)
      32:     dev_t dev;
      33:     struct uio *uio;
      34:     int flag;
      35: {
      36:     if (u.u_ttyp == NULL)
      37:         return (ENXIO);
      38:     return ((*cdevsw[major(u.u_ttyd)].d_read)(u.u_ttyd, uio, flag));
      39: }
      40:
      41: /*ARGSUSED*/
      42: sywrite(dev, uio, flag)
      43:     dev_t dev;
      44:     struct uio *uio;
      45: {
      46:     if (u.u_ttyp == NULL)
      47:         return (ENXIO);
      48:     return ((*cdevsw[major(u.u_ttyd)].d_write)(u.u_ttyd, uio, flag));
      49: }
      50:
      51: /*ARGSUSED*/
      52: syioctl(dev, cmd, addr, flag)
      53:     dev_t dev;
      54:     u_int cmd;
      55:     caddr_t addr;
      56:     int flag;
      57: {
      58:     if (cmd == TIOCNOTTY) {
      59:         u.u_ttyp = 0;
      60:         u.u_ttyd = 0;
      61:         u.u_procp->p_pgrp = 0;
      62:         return (0);
      63:     }
      64:     if (u.u_ttyp == NULL)
      65:         return (ENXIO);
      66:     return ((*cdevsw[major(u.u_ttyd)].d_ioctl)(u.u_ttyd, cmd, addr, flag));
      67: }
      68:
      69: /*ARGSUSED*/
      70: syselect(dev, flag)
      71:     dev_t dev;
      72:     int flag;
      73: {
      74:
      75:     if (u.u_ttyp == NULL) {
      76:         u.u_error = ENXIO;
      77:         return (0);
      78:     }
      79:     return ((*cdevsw[major(u.u_ttyd)].d_select)(u.u_ttyd, flag));
      80: }

#### Defined functions

syioctl defined in line 52; used 2 times

- in /usr/src/sys/pdp/conf.c line 337, 398

syopen defined in line 21; used 2 times

- in /usr/src/sys/pdp/conf.c line 337, 397

syread defined in line 31; used 2 times

- in /usr/src/sys/pdp/conf.c line 337, 397

syselect defined in line 70; used 2 times

- in /usr/src/sys/pdp/conf.c line 337, 398

sywrite defined in line 42; used 2 times

- in /usr/src/sys/pdp/conf.c line 337, 397

Last modified: 1994-11-30 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 632 |