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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)termios.c	8.2 (Berkeley) 2/21/94";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: src/lib/libc/gen/termios.c,v 1.16 2009/05/07 13:49:48 ed Exp $");
35
36#if __DARWIN_UNIX03
37#ifdef VARIANT_CANCELABLE
38#include <pthread.h>
39#endif /* VARIANT_CANCELABLE */
40#endif /* __DARWIN_UNIX03 */
41
42#include "namespace.h"
43#include <sys/types.h>
44#include <sys/fcntl.h>
45#include <sys/ioctl.h>
46#include <sys/time.h>
47
48#include <errno.h>
49#include <termios.h>
50#include <unistd.h>
51#include "un-namespace.h"
52
53#ifndef BUILDING_VARIANT
54int
55tcgetattr(fd, t)
56	int fd;
57	struct termios *t;
58{
59
60	return (_ioctl(fd, TIOCGETA, t));
61}
62
63int
64tcsetattr(fd, opt, t)
65	int fd, opt;
66	const struct termios *t;
67{
68	struct termios localterm;
69
70	if (opt & TCSASOFT) {
71		localterm = *t;
72		localterm.c_cflag |= CIGNORE;
73		t = &localterm;
74	}
75	switch (opt & ~TCSASOFT) {
76	case TCSANOW:
77		return (_ioctl(fd, TIOCSETA, t));
78	case TCSADRAIN:
79		return (_ioctl(fd, TIOCSETAW, t));
80	case TCSAFLUSH:
81		return (_ioctl(fd, TIOCSETAF, t));
82	default:
83		errno = EINVAL;
84		return (-1);
85	}
86}
87
88int
89tcsetpgrp(int fd, pid_t pgrp)
90{
91	int s;
92
93	if (isatty(fd) == 0)
94		return (-1);
95
96	s = pgrp;
97	return (_ioctl(fd, TIOCSPGRP, &s));
98}
99
100pid_t
101tcgetpgrp(fd)
102	int fd;
103{
104	int s;
105
106	if (isatty(fd) == 0)
107		return ((pid_t)-1);
108
109	if (_ioctl(fd, TIOCGPGRP, &s) < 0)
110		return ((pid_t)-1);
111
112	return ((pid_t)s);
113}
114
115#if 0 // Needs API review first
116pid_t
117tcgetsid(int fd)
118{
119	int s;
120
121	if (_ioctl(fd, TIOCGSID, &s) < 0)
122		return ((pid_t)-1);
123
124	return ((pid_t)s);
125}
126
127int
128tcsetsid(int fd, pid_t pid)
129{
130
131	if (pid != getsid(0)) {
132		errno = EINVAL;
133		return (-1);
134	}
135
136	return (_ioctl(fd, TIOCSCTTY, NULL));
137}
138#endif
139
140speed_t
141cfgetospeed(t)
142	const struct termios *t;
143{
144
145	return (t->c_ospeed);
146}
147
148speed_t
149cfgetispeed(t)
150	const struct termios *t;
151{
152
153	return (t->c_ispeed);
154}
155
156int
157cfsetospeed(t, speed)
158	struct termios *t;
159	speed_t speed;
160{
161
162	t->c_ospeed = speed;
163	return (0);
164}
165
166int
167cfsetispeed(t, speed)
168	struct termios *t;
169	speed_t speed;
170{
171
172	t->c_ispeed = speed;
173	return (0);
174}
175
176int
177cfsetspeed(t, speed)
178	struct termios *t;
179	speed_t speed;
180{
181
182	t->c_ispeed = t->c_ospeed = speed;
183	return (0);
184}
185
186/*
187 * Make a pre-existing termios structure into "raw" mode: character-at-a-time
188 * mode with no characters interpreted, 8-bit data path.
189 */
190void
191cfmakeraw(t)
192	struct termios *t;
193{
194
195	t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
196	t->c_iflag |= IGNBRK;
197	t->c_oflag &= ~OPOST;
198	t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
199	t->c_cflag &= ~(CSIZE|PARENB);
200	t->c_cflag |= CS8|CREAD;
201	t->c_cc[VMIN] = 1;
202	t->c_cc[VTIME] = 0;
203}
204
205int
206tcsendbreak(fd, len)
207	int fd, len;
208{
209	struct timeval sleepytime;
210
211	sleepytime.tv_sec = 0;
212	sleepytime.tv_usec = 400000;
213	if (_ioctl(fd, TIOCSBRK, 0) == -1)
214		return (-1);
215	(void)_select(0, 0, 0, 0, &sleepytime);
216	if (_ioctl(fd, TIOCCBRK, 0) == -1)
217		return (-1);
218	return (0);
219}
220#endif /* BUILDING_VARIANT */
221
222int
223__tcdrain(fd)
224	int fd;
225{
226#if __DARWIN_UNIX03
227#ifdef VARIANT_CANCELABLE
228	pthread_testcancel();
229#endif /* VARIANT_CANCELABLE */
230#endif /* __DARWIN_UNIX03 */
231	return (_ioctl(fd, TIOCDRAIN, 0));
232}
233
234__weak_reference(__tcdrain, tcdrain);
235__weak_reference(__tcdrain, _tcdrain);
236
237#ifndef BUILDING_VARIANT
238int
239tcflush(fd, which)
240	int fd, which;
241{
242	int com;
243
244	switch (which) {
245	case TCIFLUSH:
246		com = FREAD;
247		break;
248	case TCOFLUSH:
249		com = FWRITE;
250		break;
251	case TCIOFLUSH:
252		com = FREAD | FWRITE;
253		break;
254	default:
255		errno = EINVAL;
256		return (-1);
257	}
258	return (_ioctl(fd, TIOCFLUSH, &com));
259}
260
261int
262tcflow(fd, action)
263	int fd, action;
264{
265	switch (action) {
266	case TCOOFF:
267		return (_ioctl(fd, TIOCSTOP, 0));
268	case TCOON:
269		return (_ioctl(fd, TIOCSTART, 0));
270	case TCION:
271		return (_ioctl(fd, TIOCIXON, 0));
272	case TCIOFF:
273		return (_ioctl(fd, TIOCIXOFF, 0));
274	default:
275		errno = EINVAL;
276		return (-1);
277	}
278	/* NOTREACHED */
279}
280#endif /* BUILDING_VARIANT */
281