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 * @(#)termios.c 8.2 (Berkeley) 2/21/94
32 * $FreeBSD: head/lib/libc/gen/termios.c 326025 2017-11-20 19:49:47Z pfg $
33 */
34
35 #include "namespace.h"
36 #include <sys/types.h>
37 #include <sys/fcntl.h>
38 #include <sys/ioctl.h>
39 #include <sys/time.h>
40
41 #include <errno.h>
42 #include <string.h>
43 #define TTYDEFCHARS
44 #include <termios.h>
45 #undef TTYDEFCHARS
46 #include <unistd.h>
47 #include "un-namespace.h"
48
49 int __tcdrain(int);
50
51 int
tcgetattr(int fd,struct termios * t)52 tcgetattr(int fd, struct termios *t)
53 {
54
55 return (_ioctl(fd, TIOCGETA, t));
56 }
57
58 int
tcsetattr(int fd,int opt,const struct termios * t)59 tcsetattr(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
81 int
tcsetpgrp(int fd,pid_t pgrp)82 tcsetpgrp(int fd, pid_t pgrp)
83 {
84 int s;
85
86 s = pgrp;
87 return (_ioctl(fd, TIOCSPGRP, &s));
88 }
89
90 pid_t
tcgetpgrp(int fd)91 tcgetpgrp(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
101 pid_t
tcgetsid(int fd)102 tcgetsid(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
112 int
tcsetsid(int fd,pid_t pid)113 tcsetsid(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
124 speed_t
cfgetospeed(const struct termios * t)125 cfgetospeed(const struct termios *t)
126 {
127
128 return (t->c_ospeed);
129 }
130
131 speed_t
cfgetispeed(const struct termios * t)132 cfgetispeed(const struct termios *t)
133 {
134
135 return (t->c_ispeed);
136 }
137
138 int
cfsetospeed(struct termios * t,speed_t speed)139 cfsetospeed(struct termios *t, speed_t speed)
140 {
141
142 t->c_ospeed = speed;
143 return (0);
144 }
145
146 int
cfsetispeed(struct termios * t,speed_t speed)147 cfsetispeed(struct termios *t, speed_t speed)
148 {
149
150 t->c_ispeed = speed;
151 return (0);
152 }
153
154 int
cfsetspeed(struct termios * t,speed_t speed)155 cfsetspeed(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 */
166 void
cfmakeraw(struct termios * t)167 cfmakeraw(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 */
184 void
cfmakesane(struct termios * t)185 cfmakesane(struct termios *t)
186 {
187 t->c_cflag = TTYDEF_CFLAG;
188 t->c_iflag = TTYDEF_IFLAG;
189 t->c_lflag = TTYDEF_LFLAG;
190 t->c_oflag = TTYDEF_OFLAG;
191 t->c_ispeed = TTYDEF_SPEED;
192 t->c_ospeed = TTYDEF_SPEED;
193 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars);
194 }
195
196 int
tcsendbreak(int fd,int len __unused)197 tcsendbreak(int fd, int len __unused)
198 {
199 struct timeval sleepytime;
200
201 sleepytime.tv_sec = 0;
202 sleepytime.tv_usec = 400000;
203 if (_ioctl(fd, TIOCSBRK, 0) == -1)
204 return (-1);
205 _select(0, 0, 0, 0, &sleepytime);
206 if (_ioctl(fd, TIOCCBRK, 0) == -1)
207 return (-1);
208 return (0);
209 }
210
211 int
__tcdrain(int fd)212 __tcdrain(int fd)
213 {
214 return (_ioctl(fd, TIOCDRAIN, 0));
215 }
216
217 #ifndef _THREAD_SAFE
218 __weak_reference(__tcdrain, tcdrain);
219 #endif
220
221 int
tcflush(int fd,int which)222 tcflush(int fd, int which)
223 {
224 int com;
225
226 switch (which) {
227 case TCIFLUSH:
228 com = FREAD;
229 break;
230 case TCOFLUSH:
231 com = FWRITE;
232 break;
233 case TCIOFLUSH:
234 com = FREAD | FWRITE;
235 break;
236 default:
237 errno = EINVAL;
238 return (-1);
239 }
240 return (_ioctl(fd, TIOCFLUSH, &com));
241 }
242
243 int
tcflow(int fd,int action)244 tcflow(int fd, int action)
245 {
246 struct termios term;
247 u_char c;
248
249 switch (action) {
250 case TCOOFF:
251 return (_ioctl(fd, TIOCSTOP, 0));
252 case TCOON:
253 return (_ioctl(fd, TIOCSTART, 0));
254 case TCION:
255 case TCIOFF:
256 if (tcgetattr(fd, &term) == -1)
257 return (-1);
258 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
259 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
260 return (-1);
261 return (0);
262 default:
263 errno = EINVAL;
264 return (-1);
265 }
266 /* NOTREACHED */
267 }
268