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
47 int
tcgetattr(int fd,struct termios * t)48 tcgetattr(int fd, struct termios *t)
49 {
50
51 return (_ioctl(fd, TIOCGETA, t));
52 }
53
54 int
tcsetattr(int fd,int opt,const struct termios * t)55 tcsetattr(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
77 int
tcsetpgrp(int fd,pid_t pgrp)78 tcsetpgrp(int fd, pid_t pgrp)
79 {
80 int s;
81
82 s = pgrp;
83 return (_ioctl(fd, TIOCSPGRP, &s));
84 }
85
86 pid_t
tcgetpgrp(int fd)87 tcgetpgrp(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
97 pid_t
tcgetsid(int fd)98 tcgetsid(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
108 int
tcsetsid(int fd,pid_t pid)109 tcsetsid(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
120 speed_t
cfgetospeed(const struct termios * t)121 cfgetospeed(const struct termios *t)
122 {
123
124 return (t->c_ospeed);
125 }
126
127 speed_t
cfgetispeed(const struct termios * t)128 cfgetispeed(const struct termios *t)
129 {
130
131 return (t->c_ispeed);
132 }
133
134 int
cfsetospeed(struct termios * t,speed_t speed)135 cfsetospeed(struct termios *t, speed_t speed)
136 {
137
138 t->c_ospeed = speed;
139 return (0);
140 }
141
142 int
cfsetispeed(struct termios * t,speed_t speed)143 cfsetispeed(struct termios *t, speed_t speed)
144 {
145
146 t->c_ispeed = speed;
147 return (0);
148 }
149
150 int
cfsetspeed(struct termios * t,speed_t speed)151 cfsetspeed(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 */
162 void
cfmakeraw(struct termios * t)163 cfmakeraw(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 */
180 void
cfmakesane(struct termios * t)181 cfmakesane(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
193 int
tcsendbreak(int fd,int len __unused)194 tcsendbreak(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
208 int
__libc_tcdrain(int fd)209 __libc_tcdrain(int fd)
210 {
211
212 return (_ioctl(fd, TIOCDRAIN, 0));
213 }
214
215 #pragma weak tcdrain
216 int
tcdrain(int fd)217 tcdrain(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
227 int
tcflush(int fd,int which)228 tcflush(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
249 int
tcflow(int fd,int action)250 tcflow(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
275 int
tcgetwinsize(int fd,struct winsize * w)276 tcgetwinsize(int fd, struct winsize *w)
277 {
278
279 return (_ioctl(fd, TIOCGWINSZ, w));
280 }
281
282 int
tcsetwinsize(int fd,const struct winsize * w)283 tcsetwinsize(int fd, const struct winsize *w)
284 {
285
286 return (_ioctl(fd, TIOCSWINSZ, w));
287 }
288