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("$FreeBSD$");
35
36#include "namespace.h"
37#include <sys/types.h>
38#include <sys/fcntl.h>
39#include <sys/ioctl.h>
40#include <sys/time.h>
41
42#include <errno.h>
43#include <string.h>
44#define	TTYDEFCHARS
45#include <termios.h>
46#include <unistd.h>
47#include "un-namespace.h"
48
49#include "libc_private.h"
50
51int
52tcgetattr(int fd, struct termios *t)
53{
54
55	return (_ioctl(fd, TIOCGETA, t));
56}
57
58int
59tcsetattr(int fd, int opt, const struct termios *t)
60{
61	struct termios localterm;
62
63	if (opt & TCSASOFT) {
64		localterm = *t;
65		localterm.c_cflag |= CIGNORE;
66		t = &localterm;
67	}
68	switch (opt & ~TCSASOFT) {
69	case TCSANOW:
70		return (_ioctl(fd, TIOCSETA, t));
71	case TCSADRAIN:
72		return (_ioctl(fd, TIOCSETAW, t));
73	case TCSAFLUSH:
74		return (_ioctl(fd, TIOCSETAF, t));
75	default:
76		errno = EINVAL;
77		return (-1);
78	}
79}
80
81int
82tcsetpgrp(int fd, pid_t pgrp)
83{
84	int s;
85
86	s = pgrp;
87	return (_ioctl(fd, TIOCSPGRP, &s));
88}
89
90pid_t
91tcgetpgrp(int fd)
92{
93	int s;
94
95	if (_ioctl(fd, TIOCGPGRP, &s) < 0)
96		return ((pid_t)-1);
97
98	return ((pid_t)s);
99}
100
101pid_t
102tcgetsid(int fd)
103{
104	int s;
105
106	if (_ioctl(fd, TIOCGSID, &s) < 0)
107		return ((pid_t)-1);
108
109	return ((pid_t)s);
110}
111
112int
113tcsetsid(int fd, pid_t pid)
114{
115
116	if (pid != getsid(0)) {
117		errno = EINVAL;
118		return (-1);
119	}
120
121	return (_ioctl(fd, TIOCSCTTY, NULL));
122}
123
124speed_t
125cfgetospeed(const struct termios *t)
126{
127
128	return (t->c_ospeed);
129}
130
131speed_t
132cfgetispeed(const struct termios *t)
133{
134
135	return (t->c_ispeed);
136}
137
138int
139cfsetospeed(struct termios *t, speed_t speed)
140{
141
142	t->c_ospeed = speed;
143	return (0);
144}
145
146int
147cfsetispeed(struct termios *t, speed_t speed)
148{
149
150	t->c_ispeed = speed;
151	return (0);
152}
153
154int
155cfsetspeed(struct termios *t, speed_t speed)
156{
157
158	t->c_ispeed = t->c_ospeed = speed;
159	return (0);
160}
161
162/*
163 * Make a pre-existing termios structure into "raw" mode: character-at-a-time
164 * mode with no characters interpreted, 8-bit data path.
165 */
166void
167cfmakeraw(struct termios *t)
168{
169
170	t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
171	t->c_iflag |= IGNBRK;
172	t->c_oflag &= ~OPOST;
173	t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
174	t->c_cflag &= ~(CSIZE|PARENB);
175	t->c_cflag |= CS8|CREAD;
176	t->c_cc[VMIN] = 1;
177	t->c_cc[VTIME] = 0;
178}
179
180/*
181 * Obtain a termios structure which is similar to the one provided by
182 * the kernel.
183 */
184void
185cfmakesane(struct termios *t)
186{
187
188	t->c_cflag = TTYDEF_CFLAG;
189	t->c_iflag = TTYDEF_IFLAG;
190	t->c_lflag = TTYDEF_LFLAG;
191	t->c_oflag = TTYDEF_OFLAG;
192	t->c_ispeed = TTYDEF_SPEED;
193	t->c_ospeed = TTYDEF_SPEED;
194	memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars);
195}
196
197int
198tcsendbreak(int fd, int len __unused)
199{
200	struct timeval sleepytime;
201
202	sleepytime.tv_sec = 0;
203	sleepytime.tv_usec = 400000;
204	if (_ioctl(fd, TIOCSBRK, 0) == -1)
205		return (-1);
206	(void)_select(0, 0, 0, 0, &sleepytime);
207	if (_ioctl(fd, TIOCCBRK, 0) == -1)
208		return (-1);
209	return (0);
210}
211
212int
213__libc_tcdrain(int fd)
214{
215
216	return (_ioctl(fd, TIOCDRAIN, 0));
217}
218
219#pragma weak tcdrain
220int
221tcdrain(int fd)
222{
223
224	return (((int (*)(int))
225	    __libc_interposing[INTERPOS_tcdrain])(fd));
226}
227
228__weak_reference(__libc_tcdrain, __tcdrain);
229__weak_reference(__libc_tcdrain, _tcdrain);
230
231int
232tcflush(int fd, int which)
233{
234	int com;
235
236	switch (which) {
237	case TCIFLUSH:
238		com = FREAD;
239		break;
240	case TCOFLUSH:
241		com = FWRITE;
242		break;
243	case TCIOFLUSH:
244		com = FREAD | FWRITE;
245		break;
246	default:
247		errno = EINVAL;
248		return (-1);
249	}
250	return (_ioctl(fd, TIOCFLUSH, &com));
251}
252
253int
254tcflow(int fd, int action)
255{
256	struct termios term;
257	u_char c;
258
259	switch (action) {
260	case TCOOFF:
261		return (_ioctl(fd, TIOCSTOP, 0));
262	case TCOON:
263		return (_ioctl(fd, TIOCSTART, 0));
264	case TCION:
265	case TCIOFF:
266		if (tcgetattr(fd, &term) == -1)
267			return (-1);
268		c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
269		if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
270			return (-1);
271		return (0);
272	default:
273		errno = EINVAL;
274		return (-1);
275	}
276	/* NOTREACHED */
277}
278