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 <sys/cdefs.h>
33 __SCCSID("@(#)termios.c 8.2 (Berkeley) 2/21/94");
34 #include "namespace.h"
35 #include <sys/types.h>
36 #include <sys/fcntl.h>
37 #include <sys/ioctl.h>
38 #include <sys/time.h>
39
40 #include <errno.h>
41 #include <string.h>
42 #define TTYDEFCHARS
43 #include <termios.h>
44 #include <unistd.h>
45 #include "un-namespace.h"
46
47 #include "libc_private.h"
48
49 int
tcgetattr(int fd,struct termios * t)50 tcgetattr(int fd, struct termios *t)
51 {
52
53 return (_ioctl(fd, TIOCGETA, t));
54 }
55
56 int
tcsetattr(int fd,int opt,const struct termios * t)57 tcsetattr(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
79 int
tcsetpgrp(int fd,pid_t pgrp)80 tcsetpgrp(int fd, pid_t pgrp)
81 {
82 int s;
83
84 s = pgrp;
85 return (_ioctl(fd, TIOCSPGRP, &s));
86 }
87
88 pid_t
tcgetpgrp(int fd)89 tcgetpgrp(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
99 pid_t
tcgetsid(int fd)100 tcgetsid(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
110 int
tcsetsid(int fd,pid_t pid)111 tcsetsid(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
122 speed_t
cfgetospeed(const struct termios * t)123 cfgetospeed(const struct termios *t)
124 {
125
126 return (t->c_ospeed);
127 }
128
129 speed_t
cfgetispeed(const struct termios * t)130 cfgetispeed(const struct termios *t)
131 {
132
133 return (t->c_ispeed);
134 }
135
136 int
cfsetospeed(struct termios * t,speed_t speed)137 cfsetospeed(struct termios *t, speed_t speed)
138 {
139
140 t->c_ospeed = speed;
141 return (0);
142 }
143
144 int
cfsetispeed(struct termios * t,speed_t speed)145 cfsetispeed(struct termios *t, speed_t speed)
146 {
147
148 t->c_ispeed = speed;
149 return (0);
150 }
151
152 int
cfsetspeed(struct termios * t,speed_t speed)153 cfsetspeed(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 */
164 void
cfmakeraw(struct termios * t)165 cfmakeraw(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 */
182 void
cfmakesane(struct termios * t)183 cfmakesane(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
195 int
tcsendbreak(int fd,int len __unused)196 tcsendbreak(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
210 int
__libc_tcdrain(int fd)211 __libc_tcdrain(int fd)
212 {
213
214 return (_ioctl(fd, TIOCDRAIN, 0));
215 }
216
217 #pragma weak tcdrain
218 int
tcdrain(int fd)219 tcdrain(int fd)
220 {
221
222 return (((int (*)(int))
223 __libc_interposing[INTERPOS_tcdrain])(fd));
224 }
225
226 __weak_reference(__libc_tcdrain, __tcdrain);
227 __weak_reference(__libc_tcdrain, _tcdrain);
228
229 int
tcflush(int fd,int which)230 tcflush(int fd, int which)
231 {
232 int com;
233
234 switch (which) {
235 case TCIFLUSH:
236 com = FREAD;
237 break;
238 case TCOFLUSH:
239 com = FWRITE;
240 break;
241 case TCIOFLUSH:
242 com = FREAD | FWRITE;
243 break;
244 default:
245 errno = EINVAL;
246 return (-1);
247 }
248 return (_ioctl(fd, TIOCFLUSH, &com));
249 }
250
251 int
tcflow(int fd,int action)252 tcflow(int fd, int action)
253 {
254 struct termios term;
255 u_char c;
256
257 switch (action) {
258 case TCOOFF:
259 return (_ioctl(fd, TIOCSTOP, 0));
260 case TCOON:
261 return (_ioctl(fd, TIOCSTART, 0));
262 case TCION:
263 case TCIOFF:
264 if (tcgetattr(fd, &term) == -1)
265 return (-1);
266 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
267 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
268 return (-1);
269 return (0);
270 default:
271 errno = EINVAL;
272 return (-1);
273 }
274 /* NOTREACHED */
275 }
276
277 int
tcgetwinsize(int fd,struct winsize * w)278 tcgetwinsize(int fd, struct winsize *w)
279 {
280
281 return (_ioctl(fd, TIOCGWINSZ, w));
282 }
283
284 int
tcsetwinsize(int fd,const struct winsize * w)285 tcsetwinsize(int fd, const struct winsize *w)
286 {
287
288 return (_ioctl(fd, TIOCSWINSZ, w));
289 }
290