projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| da7c5cc6 | 1 | /* |
| 0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
| da7c5cc6 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | * | |
| 18b87772 | 6 | * @(#)tty_tty.c 7.6 (Berkeley) %G% |
| da7c5cc6 | 7 | */ |
| 63c57592 BJ |
8 | |
| 9 | /* | |
| 964bcfb1 | 10 | * Indirect driver for controlling tty. |
| 63c57592 | 11 | */ |
| 94368568 JB |
12 | #include "param.h" |
| 13 | #include "systm.h" | |
| 14 | #include "conf.h" | |
| 94368568 JB |
15 | #include "user.h" |
| 16 | #include "ioctl.h" | |
| 17 | #include "tty.h" | |
| 18 | #include "proc.h" | |
| 232c0273 MT |
19 | #include "vnode.h" |
| 20 | #include "file.h" | |
| 94368568 | 21 | #include "uio.h" |
| 63c57592 | 22 | |
| 232c0273 MT |
23 | #define cttyvp(p) ((p)->p_flag&SCTTY ? (p)->p_session->s_ttyvp : NULL) |
| 24 | ||
| 63c57592 BJ |
25 | /*ARGSUSED*/ |
| 26 | syopen(dev, flag) | |
| 830bbc16 BJ |
27 | dev_t dev; |
| 28 | int flag; | |
| 63c57592 | 29 | { |
| 232c0273 MT |
30 | struct vnode *ttyvp = cttyvp(u.u_procp); |
| 31 | int error; | |
| 63c57592 | 32 | |
| 232c0273 | 33 | if (ttyvp == NULL) |
| 830bbc16 | 34 | return (ENXIO); |
| 232c0273 MT |
35 | if (error = VOP_ACCESS(ttyvp, |
| 36 | (flag&FREAD ? VREAD : 0) | (flag&FWRITE ? VWRITE : 0), u.u_cred)) | |
| 37 | return (error); | |
| 38 | return (VOP_OPEN(ttyvp, flag, NOCRED)); | |
| 63c57592 BJ |
39 | } |
| 40 | ||
| 41 | /*ARGSUSED*/ | |
| 76e0e3c3 | 42 | syread(dev, uio, flag) |
| be3a1208 BJ |
43 | dev_t dev; |
| 44 | struct uio *uio; | |
| 63c57592 | 45 | { |
| 18b87772 KM |
46 | register struct vnode *ttyvp = cttyvp(u.u_procp); |
| 47 | int error; | |
| 63c57592 | 48 | |
| 232c0273 | 49 | if (ttyvp == NULL) |
| 840510a3 | 50 | return (ENXIO); |
| 18b87772 KM |
51 | VOP_LOCK(ttyvp); |
| 52 | error = VOP_READ(ttyvp, uio, flag, NOCRED); | |
| 53 | VOP_UNLOCK(ttyvp); | |
| 54 | return (error); | |
| 63c57592 BJ |
55 | } |
| 56 | ||
| 57 | /*ARGSUSED*/ | |
| 76e0e3c3 | 58 | sywrite(dev, uio, flag) |
| be3a1208 BJ |
59 | dev_t dev; |
| 60 | struct uio *uio; | |
| 63c57592 | 61 | { |
| 18b87772 KM |
62 | register struct vnode *ttyvp = cttyvp(u.u_procp); |
| 63 | int error; | |
| 63c57592 | 64 | |
| 232c0273 | 65 | if (ttyvp == NULL) |
| 840510a3 | 66 | return (ENXIO); |
| 18b87772 KM |
67 | VOP_LOCK(ttyvp); |
| 68 | error = VOP_WRITE(ttyvp, uio, flag, NOCRED); | |
| 69 | VOP_UNLOCK(ttyvp); | |
| 70 | return (error); | |
| 63c57592 BJ |
71 | } |
| 72 | ||
| 73 | /*ARGSUSED*/ | |
| 74 | syioctl(dev, cmd, addr, flag) | |
| 35c1dcdb BJ |
75 | dev_t dev; |
| 76 | int cmd; | |
| 77 | caddr_t addr; | |
| 78 | int flag; | |
| 63c57592 | 79 | { |
| 232c0273 | 80 | struct vnode *ttyvp = cttyvp(u.u_procp); |
| 63c57592 | 81 | |
| 232c0273 MT |
82 | if (ttyvp == NULL) |
| 83 | return (ENXIO); | |
| 9060c89c | 84 | if (cmd == TIOCNOTTY) { |
| 232c0273 MT |
85 | if (!SESS_LEADER(u.u_procp)) { |
| 86 | u.u_procp->p_flag &= ~SCTTY; | |
| 87 | return (0); | |
| 88 | } else | |
| 89 | return (EINVAL); | |
| 4460d508 | 90 | } |
| 232c0273 | 91 | return (VOP_IOCTL(ttyvp, cmd, addr, flag, NOCRED)); |
| 63c57592 | 92 | } |
| 231ed58b | 93 | |
| a8d3bf7f | 94 | /*ARGSUSED*/ |
| 231ed58b | 95 | syselect(dev, flag) |
| a8d3bf7f BJ |
96 | dev_t dev; |
| 97 | int flag; | |
| 231ed58b | 98 | { |
| 232c0273 | 99 | struct vnode *ttyvp = cttyvp(u.u_procp); |
| 231ed58b | 100 | |
| 232c0273 MT |
101 | if (ttyvp == NULL) |
| 102 | return (ENXIO); | |
| 103 | return (VOP_SELECT(ttyvp, flag, NOCRED)); | |
| 231ed58b | 104 | } |