projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 231ed58b | 1 | /* tty_tty.c 4.4 81/10/11 */ |
| 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" | |
| 15 | ||
| 16 | /*ARGSUSED*/ | |
| 17 | syopen(dev, flag) | |
| 18 | { | |
| 19 | ||
| 4460d508 | 20 | if(u.u_ttyp == NULL || (u.u_procp->p_flag&SDETACH)) { |
| 63c57592 BJ |
21 | u.u_error = ENXIO; |
| 22 | return; | |
| 23 | } | |
| 24 | (*cdevsw[major(u.u_ttyd)].d_open)(u.u_ttyd, flag); | |
| 25 | } | |
| 26 | ||
| 27 | /*ARGSUSED*/ | |
| 28 | syread(dev) | |
| 29 | { | |
| 30 | ||
| 4460d508 BJ |
31 | if (u.u_procp->p_flag&SDETACH) { |
| 32 | u.u_error = ENXIO; | |
| 33 | return; | |
| 34 | } | |
| 63c57592 BJ |
35 | (*cdevsw[major(u.u_ttyd)].d_read)(u.u_ttyd); |
| 36 | } | |
| 37 | ||
| 38 | /*ARGSUSED*/ | |
| 39 | sywrite(dev) | |
| 40 | { | |
| 41 | ||
| 4460d508 BJ |
42 | if (u.u_procp->p_flag&SDETACH) { |
| 43 | u.u_error = ENXIO; | |
| 44 | return; | |
| 45 | } | |
| 63c57592 BJ |
46 | (*cdevsw[major(u.u_ttyd)].d_write)(u.u_ttyd); |
| 47 | } | |
| 48 | ||
| 49 | /*ARGSUSED*/ | |
| 50 | syioctl(dev, cmd, addr, flag) | |
| 51 | caddr_t addr; | |
| 52 | { | |
| 53 | ||
| 4460d508 BJ |
54 | if (u.u_procp->p_flag&SDETACH) { |
| 55 | u.u_error = ENXIO; | |
| 56 | return; | |
| 57 | } | |
| 63c57592 BJ |
58 | (*cdevsw[major(u.u_ttyd)].d_ioctl)(u.u_ttyd, cmd, addr, flag); |
| 59 | } | |
| 231ed58b BJ |
60 | |
| 61 | syselect(dev, flag) | |
| 62 | { | |
| 63 | ||
| 64 | if (u.u_procp->p_flag&SDETACH) { | |
| 65 | u.u_error = ENXIO; | |
| 66 | return; | |
| 67 | } | |
| 68 | (*cdevsw[major(u.u_ttyd)].d_select)(dev, flag); | |
| 69 | } |