projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| da7c5cc6 KM |
1 | /* |
| 2 | * Copyright (c) 1982 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 6.3 (Berkeley) %G% | |
| 7 | */ | |
| 63c57592 BJ |
8 | |
| 9 | /* | |
| 964bcfb1 | 10 | * Indirect driver for controlling tty. |
| 231ed58b BJ |
11 | * |
| 12 | * THIS IS GARBAGE: MUST SOON BE DONE WITH struct inode * IN PROC TABLE. | |
| 63c57592 | 13 | */ |
| 94368568 JB |
14 | #include "param.h" |
| 15 | #include "systm.h" | |
| 16 | #include "conf.h" | |
| 17 | #include "dir.h" | |
| 18 | #include "user.h" | |
| 19 | #include "ioctl.h" | |
| 20 | #include "tty.h" | |
| 21 | #include "proc.h" | |
| 22 | #include "uio.h" | |
| 63c57592 BJ |
23 | |
| 24 | /*ARGSUSED*/ | |
| 25 | syopen(dev, flag) | |
| 830bbc16 BJ |
26 | dev_t dev; |
| 27 | int flag; | |
| 63c57592 BJ |
28 | { |
| 29 | ||
| 830bbc16 BJ |
30 | if (u.u_ttyp == NULL) |
| 31 | return (ENXIO); | |
| 32 | return ((*cdevsw[major(u.u_ttyd)].d_open)(u.u_ttyd, flag)); | |
| 63c57592 BJ |
33 | } |
| 34 | ||
| 35 | /*ARGSUSED*/ | |
| be3a1208 BJ |
36 | syread(dev, uio) |
| 37 | dev_t dev; | |
| 38 | struct uio *uio; | |
| 63c57592 BJ |
39 | { |
| 40 | ||
| 840510a3 BJ |
41 | if (u.u_ttyp == NULL) |
| 42 | return (ENXIO); | |
| 43 | return ((*cdevsw[major(u.u_ttyd)].d_read)(u.u_ttyd, uio)); | |
| 63c57592 BJ |
44 | } |
| 45 | ||
| 46 | /*ARGSUSED*/ | |
| be3a1208 BJ |
47 | sywrite(dev, uio) |
| 48 | dev_t dev; | |
| 49 | struct uio *uio; | |
| 63c57592 BJ |
50 | { |
| 51 | ||
| 840510a3 BJ |
52 | if (u.u_ttyp == NULL) |
| 53 | return (ENXIO); | |
| 54 | return ((*cdevsw[major(u.u_ttyd)].d_write)(u.u_ttyd, uio)); | |
| 63c57592 BJ |
55 | } |
| 56 | ||
| 57 | /*ARGSUSED*/ | |
| 58 | syioctl(dev, cmd, addr, flag) | |
| 35c1dcdb BJ |
59 | dev_t dev; |
| 60 | int cmd; | |
| 61 | caddr_t addr; | |
| 62 | int flag; | |
| 63c57592 BJ |
63 | { |
| 64 | ||
| 9060c89c BJ |
65 | if (cmd == TIOCNOTTY) { |
| 66 | u.u_ttyp = 0; | |
| 67 | u.u_ttyd = 0; | |
| 68 | u.u_procp->p_pgrp = 0; | |
| 830bbc16 | 69 | return (0); |
| 4460d508 | 70 | } |
| 830bbc16 BJ |
71 | if (u.u_ttyp == NULL) |
| 72 | return (ENXIO); | |
| 73 | return ((*cdevsw[major(u.u_ttyd)].d_ioctl)(u.u_ttyd, cmd, addr, flag)); | |
| 63c57592 | 74 | } |
| 231ed58b | 75 | |
| a8d3bf7f | 76 | /*ARGSUSED*/ |
| 231ed58b | 77 | syselect(dev, flag) |
| a8d3bf7f BJ |
78 | dev_t dev; |
| 79 | int flag; | |
| 231ed58b BJ |
80 | { |
| 81 | ||
| e8743532 | 82 | if (u.u_ttyp == NULL) { |
| 231ed58b | 83 | u.u_error = ENXIO; |
| 9060c89c | 84 | return (0); |
| 231ed58b | 85 | } |
| 0f8a7bf9 | 86 | return ((*cdevsw[major(u.u_ttyd)].d_select)(u.u_ttyd, flag)); |
| 231ed58b | 87 | } |