2 * SPDX-License-Identifier: BSD-3-Clause
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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 $
35 #include "namespace.h"
36 #include <sys/types.h>
37 #include <sys/fcntl.h>
38 #include <sys/ioctl.h>
47 #include "un-namespace.h"
52 tcgetattr(int fd, struct termios *t)
55 return (_ioctl(fd, TIOCGETA, t));
59 tcsetattr(int fd, int opt, const struct termios *t)
61 struct termios localterm;
65 localterm.c_cflag |= CIGNORE;
68 switch (opt & ~TCSASOFT) {
70 return (_ioctl(fd, TIOCSETA, t));
72 return (_ioctl(fd, TIOCSETAW, t));
74 return (_ioctl(fd, TIOCSETAF, t));
82 tcsetpgrp(int fd, pid_t pgrp)
87 return (_ioctl(fd, TIOCSPGRP, &s));
95 if (_ioctl(fd, TIOCGPGRP, &s) < 0)
106 if (_ioctl(fd, TIOCGSID, &s) < 0)
113 tcsetsid(int fd, pid_t pid)
116 if (pid != getsid(0)) {
121 return (_ioctl(fd, TIOCSCTTY, NULL));
125 cfgetospeed(const struct termios *t)
128 return (t->c_ospeed);
132 cfgetispeed(const struct termios *t)
135 return (t->c_ispeed);
139 cfsetospeed(struct termios *t, speed_t speed)
147 cfsetispeed(struct termios *t, speed_t speed)
155 cfsetspeed(struct termios *t, speed_t speed)
158 t->c_ispeed = t->c_ospeed = speed;
163 * Make a pre-existing termios structure into "raw" mode: character-at-a-time
164 * mode with no characters interpreted, 8-bit data path.
167 cfmakeraw(struct termios *t)
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;
181 * Obtain a termios structure which is similar to the one provided by
185 cfmakesane(struct termios *t)
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);
197 tcsendbreak(int fd, int len __unused)
199 struct timeval sleepytime;
201 sleepytime.tv_sec = 0;
202 sleepytime.tv_usec = 400000;
203 if (_ioctl(fd, TIOCSBRK, 0) == -1)
205 _select(0, 0, 0, 0, &sleepytime);
206 if (_ioctl(fd, TIOCCBRK, 0) == -1)
214 return (_ioctl(fd, TIOCDRAIN, 0));
218 __weak_reference(__tcdrain, tcdrain);
222 tcflush(int fd, int which)
234 com = FREAD | FWRITE;
240 return (_ioctl(fd, TIOCFLUSH, &com));
244 tcflow(int fd, int action)
251 return (_ioctl(fd, TIOCSTOP, 0));
253 return (_ioctl(fd, TIOCSTART, 0));
256 if (tcgetattr(fd, &term) == -1)
258 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
259 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)