1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include "namespace.h"
33#include <sys/types.h>
34#include <sys/fcntl.h>
35#include <sys/ioctl.h>
36#include <sys/time.h>
37
38#include <errno.h>
39#include <string.h>
40#define	TTYDEFCHARS
41#include <termios.h>
42#include <unistd.h>
43#include "un-namespace.h"
44
45#include "libc_private.h"
46
47int
48tcgetattr(int fd, struct termios *t)
49{
50
51	return (_ioctl(fd, TIOCGETA, t));
52}
53
54int
55tcsetattr(int fd, int opt, const struct termios *t)
56{
57	struct termios localterm;
58
59	if (opt & TCSASOFT) {
60		localterm = *t;
61		localterm.c_cflag |= CIGNORE;
62		t = &localterm;
63	}
64	switch (opt & ~TCSASOFT) {
65	case TCSANOW:
66		return (_ioctl(fd, TIOCSETA, t));
67	case TCSADRAIN:
68		return (_ioctl(fd, TIOCSETAW, t));
69	case TCSAFLUSH:
70		return (_ioctl(fd, TIOCSETAF, t));
71	default:
72		errno = EINVAL;
73		return (-1);
74	}
75}
76
77int
78tcsetpgrp(int fd, pid_t pgrp)
79{
80	int s;
81
82	s = pgrp;
83	return (_ioctl(fd, TIOCSPGRP, &s));
84}
85
86pid_t
87tcgetpgrp(int fd)
88{
89	int s;
90
91	if (_ioctl(fd, TIOCGPGRP, &s) < 0)
92		return ((pid_t)-1);
93
94	return ((pid_t)s);
95}
96
97pid_t
98tcgetsid(int fd)
99{
100	int s;
101
102	if (_ioctl(fd, TIOCGSID, &s) < 0)
103		return ((pid_t)-1);
104
105	return ((pid_t)s);
106}
107
108int
109tcsetsid(int fd, pid_t pid)
110{
111
112	if (pid != getsid(0)) {
113		errno = EINVAL;
114		return (-1);
115	}
116
117	return (_ioctl(fd, TIOCSCTTY, NULL));
118}
119
120speed_t
121cfgetospeed(const struct termios *t)
122{
123
124	return (t->c_ospeed);
125}
126
127speed_t
128cfgetispeed(const struct termios *t)
129{
130
131	return (t->c_ispeed);
132}
133
134int
135cfsetospeed(struct termios *t, speed_t speed)
136{
137
138	t->c_ospeed = speed;
139	return (0);
140}
141
142int
143cfsetispeed(struct termios *t, speed_t speed)
144{
145
146	t->c_ispeed = speed;
147	return (0);
148}
149
150int
151cfsetspeed(struct termios *t, speed_t speed)
152{
153
154	t->c_ispeed = t->c_ospeed = speed;
155	return (0);
156}
157
158/*
159 * Make a pre-existing termios structure into "raw" mode: character-at-a-time
160 * mode with no characters interpreted, 8-bit data path.
161 */
162void
163cfmakeraw(struct termios *t)
164{
165
166	t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
167	t->c_iflag |= IGNBRK;
168	t->c_oflag &= ~OPOST;
169	t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
170	t->c_cflag &= ~(CSIZE|PARENB);
171	t->c_cflag |= CS8|CREAD;
172	t->c_cc[VMIN] = 1;
173	t->c_cc[VTIME] = 0;
174}
175
176/*
177 * Obtain a termios structure which is similar to the one provided by
178 * the kernel.
179 */
180void
181cfmakesane(struct termios *t)
182{
183
184	t->c_cflag = TTYDEF_CFLAG;
185	t->c_iflag = TTYDEF_IFLAG;
186	t->c_lflag = TTYDEF_LFLAG;
187	t->c_oflag = TTYDEF_OFLAG;
188	t->c_ispeed = TTYDEF_SPEED;
189	t->c_ospeed = TTYDEF_SPEED;
190	memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars);
191}
192
193int
194tcsendbreak(int fd, int len __unused)
195{
196	struct timeval sleepytime;
197
198	sleepytime.tv_sec = 0;
199	sleepytime.tv_usec = 400000;
200	if (_ioctl(fd, TIOCSBRK, 0) == -1)
201		return (-1);
202	(void)_select(0, 0, 0, 0, &sleepytime);
203	if (_ioctl(fd, TIOCCBRK, 0) == -1)
204		return (-1);
205	return (0);
206}
207
208int
209__libc_tcdrain(int fd)
210{
211
212	return (_ioctl(fd, TIOCDRAIN, 0));
213}
214
215#pragma weak tcdrain
216int
217tcdrain(int fd)
218{
219
220	return (((int (*)(int))
221	    __libc_interposing[INTERPOS_tcdrain])(fd));
222}
223
224__weak_reference(__libc_tcdrain, __tcdrain);
225__weak_reference(__libc_tcdrain, _tcdrain);
226
227int
228tcflush(int fd, int which)
229{
230	int com;
231
232	switch (which) {
233	case TCIFLUSH:
234		com = FREAD;
235		break;
236	case TCOFLUSH:
237		com = FWRITE;
238		break;
239	case TCIOFLUSH:
240		com = FREAD | FWRITE;
241		break;
242	default:
243		errno = EINVAL;
244		return (-1);
245	}
246	return (_ioctl(fd, TIOCFLUSH, &com));
247}
248
249int
250tcflow(int fd, int action)
251{
252	struct termios term;
253	u_char c;
254
255	switch (action) {
256	case TCOOFF:
257		return (_ioctl(fd, TIOCSTOP, 0));
258	case TCOON:
259		return (_ioctl(fd, TIOCSTART, 0));
260	case TCION:
261	case TCIOFF:
262		if (tcgetattr(fd, &term) == -1)
263			return (-1);
264		c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
265		if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
266			return (-1);
267		return (0);
268	default:
269		errno = EINVAL;
270		return (-1);
271	}
272	/* NOTREACHED */
273}
274
275int
276tcgetwinsize(int fd, struct winsize *w)
277{
278
279	return (_ioctl(fd, TIOCGWINSZ, w));
280}
281
282int
283tcsetwinsize(int fd, const struct winsize *w)
284{
285
286	return (_ioctl(fd, TIOCSWINSZ, w));
287}
288