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1.1 root 1: /*-
2: * Copyright (c) 1982, 1986, 1991 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.2 ! root 33: * from: @(#)tty_tty.c 7.15 (Berkeley) 5/28/91
! 34: * tty_tty.c,v 1.5 1993/06/27 06:01:58 andrew Exp
1.1 root 35: */
36:
37: /*
38: * Indirect driver for controlling tty.
39: */
40: #include "param.h"
41: #include "systm.h"
42: #include "conf.h"
43: #include "ioctl.h"
44: #include "tty.h"
45: #include "proc.h"
46: #include "vnode.h"
47: #include "file.h"
48:
49: #define cttyvp(p) ((p)->p_flag&SCTTY ? (p)->p_session->s_ttyvp : NULL)
50:
51: /*ARGSUSED*/
1.1.1.2 ! root 52: int
1.1 root 53: cttyopen(dev, flag, mode, p)
54: dev_t dev;
55: int flag, mode;
56: struct proc *p;
57: {
58: struct vnode *ttyvp = cttyvp(p);
59: int error;
60:
61: if (ttyvp == NULL)
62: return (ENXIO);
63: VOP_LOCK(ttyvp);
64: error = VOP_ACCESS(ttyvp,
65: (flag&FREAD ? VREAD : 0) | (flag&FWRITE ? VWRITE : 0), p->p_ucred, p);
66: if (!error)
67: error = VOP_OPEN(ttyvp, flag, NOCRED, p);
68: VOP_UNLOCK(ttyvp);
69: return (error);
70: }
71:
72: /*ARGSUSED*/
1.1.1.2 ! root 73: int
1.1 root 74: cttyread(dev, uio, flag)
75: dev_t dev;
76: struct uio *uio;
1.1.1.2 ! root 77: int flag;
1.1 root 78: {
79: register struct vnode *ttyvp = cttyvp(uio->uio_procp);
80: int error;
81:
82: if (ttyvp == NULL)
83: return (EIO);
84: VOP_LOCK(ttyvp);
85: error = VOP_READ(ttyvp, uio, flag, NOCRED);
86: VOP_UNLOCK(ttyvp);
87: return (error);
88: }
89:
90: /*ARGSUSED*/
1.1.1.2 ! root 91: int
1.1 root 92: cttywrite(dev, uio, flag)
93: dev_t dev;
94: struct uio *uio;
1.1.1.2 ! root 95: int flag;
1.1 root 96: {
97: register struct vnode *ttyvp = cttyvp(uio->uio_procp);
98: int error;
99:
100: if (ttyvp == NULL)
101: return (EIO);
102: VOP_LOCK(ttyvp);
103: error = VOP_WRITE(ttyvp, uio, flag, NOCRED);
104: VOP_UNLOCK(ttyvp);
105: return (error);
106: }
107:
108: /*ARGSUSED*/
1.1.1.2 ! root 109: int
1.1 root 110: cttyioctl(dev, cmd, addr, flag, p)
111: dev_t dev;
112: int cmd;
113: caddr_t addr;
114: int flag;
115: struct proc *p;
116: {
117: struct vnode *ttyvp = cttyvp(p);
118:
119: if (ttyvp == NULL)
120: return (EIO);
121: if (cmd == TIOCNOTTY) {
122: if (!SESS_LEADER(p)) {
123: p->p_flag &= ~SCTTY;
124: return (0);
125: } else
126: return (EINVAL);
127: }
128: return (VOP_IOCTL(ttyvp, cmd, addr, flag, NOCRED, p));
129: }
130:
131: /*ARGSUSED*/
1.1.1.2 ! root 132: int
1.1 root 133: cttyselect(dev, flag, p)
134: dev_t dev;
135: int flag;
136: struct proc *p;
137: {
138: struct vnode *ttyvp = cttyvp(p);
139:
140: if (ttyvp == NULL)
141: return (1); /* try operation to get EOF/failure */
142: return (VOP_SELECT(ttyvp, flag, FREAD|FWRITE, NOCRED, p));
143: }
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