projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| be3a1208 | 1 | /* tty_tty.c 4.10 82/08/22 */ |
| 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" | |
| 13 | #include "../h/tty.h" | |
| 14 | #include "../h/proc.h" | |
| be3a1208 | 15 | #include "../h/uio.h" |
| 63c57592 BJ |
16 | |
| 17 | /*ARGSUSED*/ | |
| 18 | syopen(dev, flag) | |
| 19 | { | |
| 20 | ||
| e8743532 | 21 | if (u.u_ttyp == NULL) { |
| 63c57592 BJ |
22 | u.u_error = ENXIO; |
| 23 | return; | |
| 24 | } | |
| 25 | (*cdevsw[major(u.u_ttyd)].d_open)(u.u_ttyd, flag); | |
| 26 | } | |
| 27 | ||
| 28 | /*ARGSUSED*/ | |
| be3a1208 BJ |
29 | syread(dev, uio) |
| 30 | dev_t dev; | |
| 31 | struct uio *uio; | |
| 63c57592 BJ |
32 | { |
| 33 | ||
| e8743532 | 34 | if (u.u_ttyp == NULL) { |
| 4460d508 BJ |
35 | u.u_error = ENXIO; |
| 36 | return; | |
| 37 | } | |
| be3a1208 | 38 | (*cdevsw[major(u.u_ttyd)].d_read)(u.u_ttyd, uio); |
| 63c57592 BJ |
39 | } |
| 40 | ||
| 41 | /*ARGSUSED*/ | |
| be3a1208 BJ |
42 | sywrite(dev, uio) |
| 43 | dev_t dev; | |
| 44 | struct uio *uio; | |
| 63c57592 BJ |
45 | { |
| 46 | ||
| e8743532 | 47 | if (u.u_ttyp == NULL) { |
| 4460d508 BJ |
48 | u.u_error = ENXIO; |
| 49 | return; | |
| 50 | } | |
| be3a1208 | 51 | (*cdevsw[major(u.u_ttyd)].d_write)(u.u_ttyd, uio); |
| 63c57592 BJ |
52 | } |
| 53 | ||
| 54 | /*ARGSUSED*/ | |
| 55 | syioctl(dev, cmd, addr, flag) | |
| 35c1dcdb BJ |
56 | dev_t dev; |
| 57 | int cmd; | |
| 58 | caddr_t addr; | |
| 59 | int flag; | |
| 63c57592 BJ |
60 | { |
| 61 | ||
| 9060c89c BJ |
62 | if (cmd == TIOCNOTTY) { |
| 63 | u.u_ttyp = 0; | |
| 64 | u.u_ttyd = 0; | |
| 65 | u.u_procp->p_pgrp = 0; | |
| 66 | return; | |
| 67 | } | |
| e8743532 | 68 | if (u.u_ttyp == NULL) { |
| 4460d508 BJ |
69 | u.u_error = ENXIO; |
| 70 | return; | |
| 71 | } | |
| 63c57592 BJ |
72 | (*cdevsw[major(u.u_ttyd)].d_ioctl)(u.u_ttyd, cmd, addr, flag); |
| 73 | } | |
| 231ed58b BJ |
74 | |
| 75 | syselect(dev, flag) | |
| 76 | { | |
| 77 | ||
| e8743532 | 78 | if (u.u_ttyp == NULL) { |
| 231ed58b | 79 | u.u_error = ENXIO; |
| 9060c89c | 80 | return (0); |
| 231ed58b | 81 | } |
| 0f8a7bf9 | 82 | return ((*cdevsw[major(u.u_ttyd)].d_select)(u.u_ttyd, flag)); |
| 231ed58b | 83 | } |