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>
46 #include "un-namespace.h"
49 tcgetattr(int fd, struct termios *t)
52 return (_ioctl(fd, TIOCGETA, t));
56 tcsetattr(int fd, int opt, const struct termios *t)
58 struct termios localterm;
62 localterm.c_cflag |= CIGNORE;
65 switch (opt & ~TCSASOFT) {
67 return (_ioctl(fd, TIOCSETA, t));
69 return (_ioctl(fd, TIOCSETAW, t));
71 return (_ioctl(fd, TIOCSETAF, t));
79 tcsetpgrp(int fd, pid_t pgrp)
84 return (_ioctl(fd, TIOCSPGRP, &s));
92 if (_ioctl(fd, TIOCGPGRP, &s) < 0)
103 if (_ioctl(fd, TIOCGSID, &s) < 0)
110 tcsetsid(int fd, pid_t pid)
113 if (pid != getsid(0)) {
118 return (_ioctl(fd, TIOCSCTTY, NULL));
122 cfgetospeed(const struct termios *t)
125 return (t->c_ospeed);
129 cfgetispeed(const struct termios *t)
132 return (t->c_ispeed);
136 cfsetospeed(struct termios *t, speed_t speed)
144 cfsetispeed(struct termios *t, speed_t speed)
152 cfsetspeed(struct termios *t, speed_t speed)
155 t->c_ispeed = t->c_ospeed = speed;
160 * Make a pre-existing termios structure into "raw" mode: character-at-a-time
161 * mode with no characters interpreted, 8-bit data path.
164 cfmakeraw(struct termios *t)
167 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
168 t->c_iflag |= IGNBRK;
169 t->c_oflag &= ~OPOST;
170 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
171 t->c_cflag &= ~(CSIZE|PARENB);
172 t->c_cflag |= CS8|CREAD;
178 * Obtain a termios structure which is similar to the one provided by
182 cfmakesane(struct termios *t)
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);
194 tcsendbreak(int fd, int len __unused)
196 struct timeval sleepytime;
198 sleepytime.tv_sec = 0;
199 sleepytime.tv_usec = 400000;
200 if (_ioctl(fd, TIOCSBRK, 0) == -1)
202 _select(0, 0, 0, 0, &sleepytime);
203 if (_ioctl(fd, TIOCCBRK, 0) == -1)
211 return (_ioctl(fd, TIOCDRAIN, 0));
215 __weak_reference(__tcdrain, tcdrain);
219 tcflush(int fd, int which)
231 com = FREAD | FWRITE;
237 return (_ioctl(fd, TIOCFLUSH, &com));
241 tcflow(int fd, int action)
248 return (_ioctl(fd, TIOCSTOP, 0));
250 return (_ioctl(fd, TIOCSTART, 0));
253 if (tcgetattr(fd, &term) == -1)
255 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
256 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)