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)
31 static 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
49 #include "libc_private.h"
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
188 t->c_cflag = TTYDEF_CFLAG;
189 t->c_iflag = TTYDEF_IFLAG;
190 t->c_lflag = TTYDEF_LFLAG;
191 t->c_oflag = TTYDEF_OFLAG;
192 t->c_ispeed = TTYDEF_SPEED;
193 t->c_ospeed = TTYDEF_SPEED;
194 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars);
195 }
196
197 int
tcsendbreak(int fd,int len __unused)198 tcsendbreak(int fd, int len __unused)
199 {
200 struct timeval sleepytime;
201
202 sleepytime.tv_sec = 0;
203 sleepytime.tv_usec = 400000;
204 if (_ioctl(fd, TIOCSBRK, 0) == -1)
205 return (-1);
206 (void)_select(0, 0, 0, 0, &sleepytime);
207 if (_ioctl(fd, TIOCCBRK, 0) == -1)
208 return (-1);
209 return (0);
210 }
211
212 int
__libc_tcdrain(int fd)213 __libc_tcdrain(int fd)
214 {
215
216 return (_ioctl(fd, TIOCDRAIN, 0));
217 }
218
219 #pragma weak tcdrain
220 int
tcdrain(int fd)221 tcdrain(int fd)
222 {
223
224 return (((int (*)(int))
225 __libc_interposing[INTERPOS_tcdrain])(fd));
226 }
227
228 __weak_reference(__libc_tcdrain, __tcdrain);
229 __weak_reference(__libc_tcdrain, _tcdrain);
230
231 int
tcflush(int fd,int which)232 tcflush(int fd, int which)
233 {
234 int com;
235
236 switch (which) {
237 case TCIFLUSH:
238 com = FREAD;
239 break;
240 case TCOFLUSH:
241 com = FWRITE;
242 break;
243 case TCIOFLUSH:
244 com = FREAD | FWRITE;
245 break;
246 default:
247 errno = EINVAL;
248 return (-1);
249 }
250 return (_ioctl(fd, TIOCFLUSH, &com));
251 }
252
253 int
tcflow(int fd,int action)254 tcflow(int fd, int action)
255 {
256 struct termios term;
257 u_char c;
258
259 switch (action) {
260 case TCOOFF:
261 return (_ioctl(fd, TIOCSTOP, 0));
262 case TCOON:
263 return (_ioctl(fd, TIOCSTART, 0));
264 case TCION:
265 case TCIOFF:
266 if (tcgetattr(fd, &term) == -1)
267 return (-1);
268 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
269 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
270 return (-1);
271 return (0);
272 default:
273 errno = EINVAL;
274 return (-1);
275 }
276 /* NOTREACHED */
277 }
278