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