projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 425a48ad | 1 | /* tty_tty.c 4.14 82/12/05 */ |
| 63c57592 BJ |
2 | |
| 3 | /* | |
| 964bcfb1 | 4 | * Indirect driver for controlling tty. |
| 231ed58b BJ |
5 | * |
| 6 | * THIS IS GARBAGE: MUST SOON BE DONE WITH struct inode * IN PROC TABLE. | |
| 63c57592 BJ |
7 | */ |
| 8 | #include "../h/param.h" | |
| 9 | #include "../h/systm.h" | |
| 10 | #include "../h/conf.h" | |
| 11 | #include "../h/dir.h" | |
| 12 | #include "../h/user.h" | |
| 425a48ad | 13 | #include "../h/ioctl.h" |
| 63c57592 BJ |
14 | #include "../h/tty.h" |
| 15 | #include "../h/proc.h" | |
| be3a1208 | 16 | #include "../h/uio.h" |
| 63c57592 BJ |
17 | |
| 18 | /*ARGSUSED*/ | |
| 19 | syopen(dev, flag) | |
| 830bbc16 BJ |
20 | dev_t dev; |
| 21 | int flag; | |
| 63c57592 BJ |
22 | { |
| 23 | ||
| 830bbc16 BJ |
24 | if (u.u_ttyp == NULL) |
| 25 | return (ENXIO); | |
| 26 | return ((*cdevsw[major(u.u_ttyd)].d_open)(u.u_ttyd, flag)); | |
| 63c57592 BJ |
27 | } |
| 28 | ||
| 29 | /*ARGSUSED*/ | |
| be3a1208 BJ |
30 | syread(dev, uio) |
| 31 | dev_t dev; | |
| 32 | struct uio *uio; | |
| 63c57592 BJ |
33 | { |
| 34 | ||
| 840510a3 BJ |
35 | if (u.u_ttyp == NULL) |
| 36 | return (ENXIO); | |
| 37 | return ((*cdevsw[major(u.u_ttyd)].d_read)(u.u_ttyd, uio)); | |
| 63c57592 BJ |
38 | } |
| 39 | ||
| 40 | /*ARGSUSED*/ | |
| be3a1208 BJ |
41 | sywrite(dev, uio) |
| 42 | dev_t dev; | |
| 43 | struct uio *uio; | |
| 63c57592 BJ |
44 | { |
| 45 | ||
| 840510a3 BJ |
46 | if (u.u_ttyp == NULL) |
| 47 | return (ENXIO); | |
| 48 | return ((*cdevsw[major(u.u_ttyd)].d_write)(u.u_ttyd, uio)); | |
| 63c57592 BJ |
49 | } |
| 50 | ||
| 51 | /*ARGSUSED*/ | |
| 52 | syioctl(dev, cmd, addr, flag) | |
| 35c1dcdb BJ |
53 | dev_t dev; |
| 54 | int cmd; | |
| 55 | caddr_t addr; | |
| 56 | int flag; | |
| 63c57592 BJ |
57 | { |
| 58 | ||
| 9060c89c BJ |
59 | if (cmd == TIOCNOTTY) { |
| 60 | u.u_ttyp = 0; | |
| 61 | u.u_ttyd = 0; | |
| 62 | u.u_procp->p_pgrp = 0; | |
| 830bbc16 | 63 | return (0); |
| 4460d508 | 64 | } |
| 830bbc16 BJ |
65 | if (u.u_ttyp == NULL) |
| 66 | return (ENXIO); | |
| 67 | return ((*cdevsw[major(u.u_ttyd)].d_ioctl)(u.u_ttyd, cmd, addr, flag)); | |
| 63c57592 | 68 | } |
| 231ed58b | 69 | |
| a8d3bf7f | 70 | /*ARGSUSED*/ |
| 231ed58b | 71 | syselect(dev, flag) |
| a8d3bf7f BJ |
72 | dev_t dev; |
| 73 | int flag; | |
| 231ed58b BJ |
74 | { |
| 75 | ||
| e8743532 | 76 | if (u.u_ttyp == NULL) { |
| 231ed58b | 77 | u.u_error = ENXIO; |
| 9060c89c | 78 | return (0); |
| 231ed58b | 79 | } |
| 0f8a7bf9 | 80 | return ((*cdevsw[major(u.u_ttyd)].d_select)(u.u_ttyd, flag)); |
| 231ed58b | 81 | } |