- Document ttyname_r().
[dragonfly.git] / lib / libc / gen / termios.c
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1/*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. 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 *
33 * $FreeBSD: src/lib/libc/gen/termios.c,v 1.9.2.1 2000/03/18 23:13:25 jasone Exp $
b0e25abd 34 * $DragonFly: src/lib/libc/gen/termios.c,v 1.5 2005/11/19 22:32:53 swildner Exp $
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35 *
36 * @(#)termios.c 8.2 (Berkeley) 2/21/94
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37 */
38
17ea2221 39#include "namespace.h"
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40#include <sys/types.h>
41#include <sys/fcntl.h>
42#include <sys/ioctl.h>
43#include <sys/time.h>
44
45#include <errno.h>
46#include <termios.h>
47#include <unistd.h>
17ea2221 48#include "un-namespace.h"
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49
50int
0f52d283 51tcgetattr(int fd, struct termios *t)
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52{
53
17ea2221 54 return (_ioctl(fd, TIOCGETA, t));
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55}
56
57int
0f52d283 58tcsetattr(int fd, int opt, const struct termios *t)
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59{
60 struct termios localterm;
61
62 if (opt & TCSASOFT) {
63 localterm = *t;
64 localterm.c_cflag |= CIGNORE;
65 t = &localterm;
66 }
67 switch (opt & ~TCSASOFT) {
68 case TCSANOW:
17ea2221 69 return (_ioctl(fd, TIOCSETA, t));
984263bc 70 case TCSADRAIN:
17ea2221 71 return (_ioctl(fd, TIOCSETAW, t));
984263bc 72 case TCSAFLUSH:
17ea2221 73 return (_ioctl(fd, TIOCSETAF, t));
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74 default:
75 errno = EINVAL;
76 return (-1);
77 }
78}
79
80int
984263bc 81tcsetpgrp(int fd, pid_t pgrp)
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82{
83 int s;
84
85 s = pgrp;
17ea2221 86 return (_ioctl(fd, TIOCSPGRP, &s));
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87}
88
89pid_t
0f52d283 90tcgetpgrp(int fd)
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91{
92 int s;
93
17ea2221 94 if (_ioctl(fd, TIOCGPGRP, &s) < 0)
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95 return ((pid_t)-1);
96
97 return ((pid_t)s);
98}
99
100speed_t
0f52d283 101cfgetospeed(const struct termios *t)
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102{
103
104 return (t->c_ospeed);
105}
106
107speed_t
0f52d283 108cfgetispeed(const struct termios *t)
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109{
110
111 return (t->c_ispeed);
112}
113
114int
0f52d283 115cfsetospeed(struct termios *t, speed_t speed)
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116{
117
118 t->c_ospeed = speed;
119 return (0);
120}
121
122int
0f52d283 123cfsetispeed(struct termios *t, speed_t speed)
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124{
125
126 t->c_ispeed = speed;
127 return (0);
128}
129
130int
0f52d283 131cfsetspeed(struct termios *t, speed_t speed)
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132{
133
134 t->c_ispeed = t->c_ospeed = speed;
135 return (0);
136}
137
138/*
139 * Make a pre-existing termios structure into "raw" mode: character-at-a-time
140 * mode with no characters interpreted, 8-bit data path.
141 */
142void
0f52d283 143cfmakeraw(struct termios *t)
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144{
145
146 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
147 t->c_iflag |= IGNBRK;
148 t->c_oflag &= ~OPOST;
149 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
150 t->c_cflag &= ~(CSIZE|PARENB);
151 t->c_cflag |= CS8|CREAD;
152 t->c_cc[VMIN] = 1;
153 t->c_cc[VTIME] = 0;
154}
155
156int
b0e25abd 157tcsendbreak(int fd, int len __unused)
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158{
159 struct timeval sleepytime;
160
161 sleepytime.tv_sec = 0;
162 sleepytime.tv_usec = 400000;
17ea2221 163 if (_ioctl(fd, TIOCSBRK, 0) == -1)
984263bc 164 return (-1);
0f52d283 165 _select(0, 0, 0, 0, &sleepytime);
17ea2221 166 if (_ioctl(fd, TIOCCBRK, 0) == -1)
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167 return (-1);
168 return (0);
169}
170
171int
0f52d283 172__tcdrain(int fd)
984263bc 173{
17ea2221 174 return (_ioctl(fd, TIOCDRAIN, 0));
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175}
176
177#ifndef _THREAD_SAFE
178__weak_reference(__tcdrain, tcdrain);
179#endif
180
181int
0f52d283 182tcflush(int fd, int which)
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183{
184 int com;
185
186 switch (which) {
187 case TCIFLUSH:
188 com = FREAD;
189 break;
190 case TCOFLUSH:
191 com = FWRITE;
192 break;
193 case TCIOFLUSH:
194 com = FREAD | FWRITE;
195 break;
196 default:
197 errno = EINVAL;
198 return (-1);
199 }
17ea2221 200 return (_ioctl(fd, TIOCFLUSH, &com));
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201}
202
203int
0f52d283 204tcflow(int fd, int action)
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205{
206 struct termios term;
207 u_char c;
208
209 switch (action) {
210 case TCOOFF:
17ea2221 211 return (_ioctl(fd, TIOCSTOP, 0));
984263bc 212 case TCOON:
17ea2221 213 return (_ioctl(fd, TIOCSTART, 0));
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214 case TCION:
215 case TCIOFF:
216 if (tcgetattr(fd, &term) == -1)
217 return (-1);
218 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
219 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
220 return (-1);
221 return (0);
222 default:
223 errno = EINVAL;
224 return (-1);
225 }
226 /* NOTREACHED */
227}